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revision 1.17 by cnh, Mon Nov 30 16:46:45 1998 UTC revision 1.1325 by dimitri, Tue Nov 2 21:23:50 2010 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7  checkpoint18  o pkg/generic_advdiff:
8      Change OBCS in multiDim advection (gad_advection.F):
9       Use maskInC to prevent intermediate update of tracer-field in OB regions,
10       thus keeping current-time-step OB values; and remove the call to OBCS_APPLY
11       which were applying future time-step OB values.
12      This way, all explicit calculations use current-time-step OB values
13       (simpler and more consistent).
14      Affects results when set-up uses time-varying OBC and multi-dim advection;
15       update output of experiment seaice_obcs.
16    o pkg/seaice:
17      move OPTIONS (formerly locally defined) to SEAICE_OPTIONS.h:
18       this includes SEAICE_GROWTH_LEGACY (+ SEAICE_DO_OPEN_WATER_GROWTH &
19         SEAICE_OCN_MELT_ACT_ON_AREA ) and SEAICE_SOLVE4TEMP_LEGACY.
20      Default (pkg/seaice/SEAICE_OPTIONS.h) is to define SEAICE_SOLVE4TEMP_LEGACY
21       but leave SEAICE_GROWTH_LEGACY undef ; For now, keep verification exp
22       unchanged (SEAICE_GROWTH_LEGACY defined in */code*/SEAICE_OPTIONS.h)
23      For OBCS, close southern and western boundaries for sea ice solver
24       based on myYGlobalLo and myXGlobalLo instead of OB_Js and OB_Iw.
25    o pkg aim (2010/10/26):
26      - Introduce ALLOW_INSOLATION, moving toward a more general incoming solar radiation
27        formulation with obliquity, eccentricity, ... as run-time parameters,
28      - Introduce diagnostics for top-of-the-atmaophere incoming solar radiation and
29        upward shortwave radition at the surface (all-sky and clear-sky).
30    o pkg/obcs:
31      - writing sections with globalFiles=T does not work: switch to tiled-files
32        when writing sections for OBCS (change pkg/rw/write_rec.F accordingly).
33      - fix index bug (OB_Ie -> OB_Iw_) in obcs_apply_uvice.F
34      - apply OBCS_SEAICE_COMPUTE_UVICE to both uice and vice at all obcs
35    
36    checkpoint62m (2010/10/21)
37    o pkg/seaice: vectorize seaice_solve4temp.F
38      - move iterations loops outside of i/j-loops
39      - requires 2D arrays for TB and effConduct
40      - add 2D iceOrNot to replace HICE_ACTUAL.GT.0, as HICE_ACTUAL is
41        modified in this routine
42      - a little bit of clean up, adjusting indentation, etc.
43      - replaced a few TEN**a by exp(a*log(10.)) in new code for better
44        performance and '**TWO' by '**2' (because TWO is a float),
45        replaced ONE, ZERO
46    o eesupp/src:
47       fix flow dir for exch1_z_RX_cube, exch1_uv_RX_cube & exch1_bg_RX_cube
48    o pkg/seaice/seaice_growth.F
49      Revision 1.89 of seaice_growth.F completes the overall october 2010 revision and
50      merging process. The merged routine has two branches, and one activates the 'evolution'
51      branch by setting SEAICE_GROWTH_LEGACY to undef (at the top of the routine for now).
52      In summary, here is what the '10/10 revision' did consist of
53        part 1: seaice_growth.F revisions 1.71 to 1.75
54          - Preliminary seaice_growth.F clean-up, keeping test results strictly unchanged.
55            The emphasis here was on improving readability (e.g. by trying to use meaningful
56            variable names) and modularity (e.g. by adding arrays to store heff etc. updates).
57        part 1.5:
58          - revising the lab_sea experiment to make it a more useful (i.e. stable
59            and representative of an actual model run). This was done by generating a
60            (winter) pickup to start from, switching back the main experiment dynamic
61            solver from evp to lsr, having one of the experiments use the free drift solution.
62        part 2: seaice_growth.F revisions 1.76 to 1.85
63          - Sorting out hard-coded constants that prevented heat and fresh water conservation.
64          - Sorting out the various fields units and sign (set early on and reset at the end)
65            to avoid numerous scalings/re-scalings. By v1.85 the basic unit for ice, heat and
66            fresh water stock is 'effective ice meters', and >0 implies more ice/snow.
67          - Using tendency terms arrays (d_HEFF* etc.) to alleviate remaining code locks,
68            and simplifying logical expressions to further improve readibility.
69        part 3: seaice_growth.F revisions 1.86 to 1.89
70          - Re-organize the blocks of code more logically.
71          - Merging the '_if.F' pieces that add something new.
72    o pkg/thsice:
73      - vectorize thsice_solve4temp and thsice_get_exf.
74        Problem: thsice_solve4temp has an unvectorizable statement that
75        might also be problematic for TAF
76      - thsice_get_exf: add the ALLOW_BULK_LARGEYEAGER04 CPP-flag. This
77        does not change the verifcation experiment, but will change all
78        experiments that have this flag undefined (not tested in verification);
79        a little reorganization to save a few 2D fields and recomputations
80      - 1st step of revisiting thsice adjoint (major recomp. sorted out)
81      - 2nd step:  fix some store dirs
82        o seems to work somewhat, i.e. using ifort but not g77
83        o likely cause are incomplete init. or recomputation
84        o start verification/global_ocean.cs32x15/input_ad.thsice
85    o pkg/obcs: add support for exch2
86      - the position of the boundary and prescribed values are specified using
87        a global domain with exch2 facets stacked
88        - in x for N,S boundaries (like W2_mapIO=-1)
89        - in y for E,W boundaries (so E,W boundaries do not overlap)
90    o pkg/mdsio: add support for writing global sections with exch2
91        file layout is as for obcs described above:
92        - for x-z sections, facets are stacked in x (like W2_mapIO=-1)
93        - for y-z sections, facets are stacked in y
94    o pkg/thsice:
95       - change a few routines for better vectorization: thsice_albedo.F,
96         thsice_step_temp.F, and in thsice_calc_thickn.F. Results are
97         not affected, but in particular the latter routine has changed
98         dramatically (not necessarily easier to read now).
99       - re-arrange calculation in THSICE_SOLVE4TEMP: move outside of i,j loops
100       iteration loop and call to S/R THSICE_GET_BULKF & THSICE_GET_EXF.
101    o verification/lab_sea:
102      - overhaul of the forward model experiments. The main motivation
103        for this revision is that lab_sea has proven quite fragile (when
104        changing the sea-ice code, and switching platforms) to a point
105        when failures were very hard to attribute to specific code problems.
106      - the suspected reason for this fragility is noise amplification by evp so,
107        to start with, we decided to replace evp with lsr in the main experiment.
108      - the input.lsr experiment thus became obsolete and was removed.
109      - it was replaced with the input.fd experiment that uses an
110        analytical "free drift" solution as the ice velocity field.
111      - Taken together, input (lsr), input.fd (free drift) and input.hb87 (evp)
112        will hopefully allow us to discriminate problems due to dynamic solvers
113        from problems due to the thermodynamic code. input.salt_plume (lsr) allows
114        us to test additional options, along with the salt plume package.
115      - Finally a pickup was generated (at the end of a one year run) to
116        make the tests more representative of an actual model run. Previously
117        the tests starting point was a 1m thickness of ice everywhere.
118    o pkg/seaice:
119      - introducing S\R seaice_freedrift.F that compute the
120        analytical solution to an approximate ice momentum
121        equation (i.e. the simple stress/coriolis balance).
122      - define SEAICE_ALLOW_FREEDRIFT to trigger the computation
123        of the free drift velocity field, and enable its use.
124        To actually use the free drift solution as the model ice
125        velocity field set SEAICEuseFREEDRIFT to .TRUE. in data.seaice.
126    o move "useOASIS" from PARAMS.h to EEPARAMS.h and read it from "eedata"
127    
128    checkpoint62l (2010/10/04)
129    o pkg/seaice:
130      -fix the USE_ORIGINAL_SBI version (for variable freezing point);
131      -use "celsius2K" in SEAICE_VARIABLE_FREEZING_POINT and in new
132       version (with USE_ORIGINAL_SBI undef);
133    o add hooks for new packages OASIS, the package will follow
134      (hooks exclude the seaice pkg for now)
135    o pkg/autodiff: ALLOW_AUTODIFF_WHTAPEIO
136      Option to use mdsio_read_whalos.F/mdsio_write_whalos.F,
137      rather than mdsio_readvector.F/mdsio_writevector.F, within
138      adread_adwrite.F to read/write adjoint-related tapes to disk.
139    o eesupp and pkg/mdsio: ALLOW_WHIO
140      Option to write/read 2D fields to files including tiles halos.
141      The main purpose is for adjoint related "tape I/O".
142      The secondary purpose is for debugging phases.
143      A word on those rather specifically intended purposes.
144      The code was meant to be stripped down to the bare minimum.
145      Typically, there is a unique and basic mapping to the global
146      buffer (tile by tile, then proc by proc, then level by level), and
147      byteswaps and meta-files are omitted. Indeed the (*_WH*) code is not
148      meant to generate user friendly outputs of various shapes and forms.
149      Rather it is intended, for the knowledgeabale developers,
150      to be largely independent of the many mdsio options, to allow
151      outputs of tiles+halos in debugging phases and in adjoint runs,
152      and to allow some flexibility in tuning (adoint) I/O depending on each
153      file system behavior. With regard to tuning, most of the potential knobs
154      (to leave files open, to allocate the I/O indep. of usesinglecpuio,
155      to specify directories, to specify the typical size of I/O calls, etc.)
156      are not yet included, and will be added if they prove useful.
157    o pkg/seaice:
158       fix uninitialised arrays in USE_ORIGINAL_SBI version of seaice_solve4temp.F
159    o pkg/seaice:
160       new S/R seaice_solve4temp.F: this is the merged version of Ian Fenty
161       code (seaice_budget_ice_if.F) which enable to recover old standard
162       code (seaice_budget_ice.F) when option USE_ORIGINAL_SBI is defined.
163       temporary: add "#define USE_ORIGINAL_SBI" at the top of seaice_solve4temp.F.
164    o model/src (rStar):
165       use simple average (not area weighted) of rStarFac at U,V point when using
166       vectorInvariant and selectKEscheme=1,3 (consistent with mom. vertical advection)
167       update output of exp. fizhi-cs-32x32x40 and fizhi-cs-aqualev20.
168    
169    checkpoint62k (2010/09/17)
170    o adjoint
171       * changed verification/global_ocean.cs32x15 ; adjoint now tests
172         Adams-Bashforth 3 + NLFS + RSTAR
173       * some more modifs required for ECCO-GODAE v4
174    o pkg/seaice
175       add SEAICE_AGE_VOL option to use volume instead of area for
176       integrating SEAICE_AGE
177    o model/src:
178       first check-in of sigma & hybrid-sigma coordinate code ; also includes
179       non-linear free-surface parts ; but pressure-gradient not yet coded.
180    o pkg/ptracers:
181       option for ptracer to convert Salt Relax into additional EmP.
182        tested in exp. global_ocean.90x40x15.dwnslp (update output)
183    
184    checkpoint62j (2010/08/25)
185    o pkg/ggl90:
186       other minor changes: remove 3-D temp array gTKE (+ add argument myIter)
187    o pkg/dic: car_flux.F, phos_flux.F
188      - reduce number of exp-calls in order to improve performance
189      - clean up a little (replace fields by their macros, etc., fix
190        typo in CPP-flag)
191    o pkg/ggl90: minor changes
192      - GGL90diffKrS was removed --> always use GGL90diffKr
193      - GGL90viscAr was removed --> replaced with GGL90viscArU, GGL90viscArV
194      - hack of mxlMaxFlag=2 --> ensure mixing between first and second level
195        (commented out for now)
196      - change in max/min operations to ensure that smoothing is ok
197      - smoothing of GGL90viscAr was moved to ggl90_calc.F (as done for GGL90diffKr)
198      - always use diffKrNrT as background profile (i.e. never use diffKr field)
199    o pkg/cfc: bug fix, AREA(i,j,1,bi,bj) -> AREA(i,j,bi,bj)
200    o pkg/dic:
201      - model/src/impldiff.F: if TARGET_NEC_SX, extend loop ranges for better
202        vectorization
203      - small bug fix in insol for the unlikely case of a cartesian grid
204      - towards vectorizing the dic package: bio_export.F, car_flux.F, phos_flux.F
205        + now vectorize, which also removes adjoint recomputations;
206        + replace integer maksp1 by _RL maskp1
207        + replace a**x by exp(x*log(a)) in phos_flux.F for speed
208    
209    checkpoint62i (2010/07/21)
210    o pkg/flt:
211      - with OBCS: stop floats which enter the OB region
212    o model/src:
213      - use tempVertAdvScheme & saltVertAdvScheme (instead of horizontal ones)
214        for implicit vertical advection.
215    o pkg/seaice:
216     - account for melting in seaice age evolution.
217     - remove double counting of seaice ridging effect on seaice age.
218    
219    checkpoint62h (2010/06/18)
220    o pkg/exch2:
221     - remove exch2_*xy_rx files: call was replaced with exch2_*3d_rx(myNz=1).
222    o tools/genmake2
223      - remove "-pdefault" option: redundant with the use of "packages.conf";
224      - remove file pkg/pkg_default : set the default as a pkg group
225        ("default_pkg_list") defined in pkg/pkg_groups;
226      - fix for case pkg/pkg_depend is missing (was hanging before);
227      - add option "-pgroups" to specify a different pkg_groups than the default.
228    o verification/adjustment.cs-32x32x1:
229       add a "minimal" set-up test (code_min & input_min) which only compiles
230       eesupp/src and the 2 pkgs (exch2 & debug) which don't need model/src & inc.
231    o tools/genmake2
232      - extend pkg_depend rules to model & eesupp (e.g., if model depend on [pkg]))
233      - fix details of checking for mnc & profile pkg when NetCDF is unavailable.
234    o pkg/exf: merge exf_bulk_largeyeager04 into exf_bulkformulae because these
235      files are nearly the same anyway.
236      Step 1: make exf_bulkformulae look like exf_bulk_largeyeager04:
237       - redefinition of tau(i,i) (by a factor of ustar)
238       - 1./exf(Const/T) -> exf(-Const/T) (big change in the results)
239       - replace rhonil by rhoConstFresh in computation of evap (bug fix)
240       - replace u/vstress=tau*rd*ws*cw by tau*rd*u/vwind (changes results)
241       - replace
242         rd(i,j)= rdn(i,j)/(exf_one - rdn(i,j)/karman*psimh )
243         shn    = sh(i,j,bi,bj)*rd(i,j)/rdn(i,j)
244         by
245         shn    = sh(i,j,bi,bj)/(exf_one - rdn(i,j)/karman*psimh )
246         (changes results)
247       -> exf_bulkformulae v1.22,
248          update verification experiments lab_sea, offline_exf_seaice, seaice_obcs
249          (lab_sea: output.hb87.txt 1.11, output.lsr.txt 1.25, output.salt_plume.txt 1.13,
250                    output.txt 1.63
251           offline_exf_seaice: output.seaicetd.txt 1.7
252           seaice_obcs: output.txt 1.10)
253      Step 2: do the actual merge and remove exf_bulk_largeyeager04.F
254       -> exf_bulkformulae v1.23,
255          unfortunately requires updating lab_sea.salt_plume (6 matching digits),
256          and global_ocean.cs32x15.icedyn (only 11 matching digits)
257      Also update output_adm of exp. lab_sea (all 4) and offline_exf_seaice.
258    o adjoint of exch-1:
259     - pass high-level EXCH S/R through TAF (eesupp/src/exch_ad_diff.list)
260       (note: was already like this when using EXCH-2) and remove flow dir
261       and hand-written AD version of high-level EXCH S/R (pkg/autodiff);
262     - provide flow-dir for low-level exch1 S/R (eesupp/src/exch1_ad.flow);
263     - update pkg/exch2 diff list.
264    
265    checkpoint62g (2010/05/19)
266    o eesupp/src (exch-1):
267     - split exch_rx.F into Forward S/R (exch1_rx.F) and Adjoint S/R (exch1_rx_ad.F)
268       and remove argument "simulationMode"; same thing for all exch_*rx_cube.F
269       (renamed to exch1_*rx_cube.F).
270     - change accordingly exch_*_rx.template and AD version in pkg/autodiff
271       to call new exch1 S/R ; update Makefile and .cvsignore.
272     - replace call to exch2_xy_rx S/R with exch2_*3d_rx(myNz=1) (will remove
273       exch2_xy_rx later)
274      Note: after updating your code, need to run "make clean" in eesupp/src
275    o test experiment bottom_ctrl_5x5:
276       new output_adm.txt with fewer grdchk & less monitor output.
277    o model/src:
278      remove the call to ini_cori in initialise_varia.F (just keep the usual one
279       in initialise_fixed.F). More consistent with coriolis & horizontal grid
280       beeing treated in the same way (ini_grid is not called a 2nd time).
281    o pkg/exf:
282      - rewrite exf_bulk_largeyeager04.F for better vectorization, changes
283      global_ocean.cs32x15/input.icedyn (11 digits of agreement), updated
284      - fix adjoint (used worked for ALLOW_ATM_WIND defined, works for this now)
285      - cosmetic changes to exf_bulkformulae.F to make it look more like
286        exf_bulk_largeyeager04.F
287    o eesupp/src (exch-1):
288      - Fix AD EXCH code for 2-D domain special cases (Nx=1 or Ny=1).
289      - Separate buffer filling and MPI sending: allow EXCH-1 to work for local
290        array (non-shared) when using MPI+MTH. Also reduces number of BARRIER
291        (even without using MPI).
292      - Message mode: move RecvAck setting (indicator of buffer being ready)
293        from send_put to recv_get S/R (was useless before, but not sure if
294        it's much more useful now);
295      - Switch the order of sync: MPI-proc 1rst and then threads;
296      - take out spin-waiting code (#undef EXCH_USE_SPINNING), use BARRIER instead.
297      - fix AD code for communication mode ='get' (but not used).
298    o model/src:
299      initialise dPhiHydX,dPhiHydY inside calc_grad_phi_hyd.F (so that TAF does
300      not drop it in S/R mddynamics, producing NaN in hs94.1x64x5 AD-test exp).
301    o utils/matlab/rdmnc.m: adapt to be able to use the generic matlab netcdf API
302    o pkg/ctrl: require a specific set of control variables and exf-flags for
303      adjoint of seaice (stop in ctrl_check.F if conditions are not satisfied)
304    o model/src:
305     a) 1rst version of a new driver S/R to turn-off output freq and flags after the
306       1rst forward sweep, to avoid over-writing output files during recomputations
307       recomputations (& grdchk); called from cost_final.F (& ctrl_init_ctrlvar.F ?)
308     b) 2nd version:
309      - add specific pkg S/R for seaice & ptracers (called from S/R TURNOFF_MODEL_IO);
310      - switch-off more output flags (exf_monFreq, chkPtFreq, dumpInitAndLast,
311         writePickupAtEnd) + seaice & ptracers output;
312      - do not switch off MNC flags (otherwise, won't get admonitor netcdf file)
313    o model/src:
314      - new S/R rotate_uv2en_rl (..._rs) that rotates vector fields.
315    o pkg/exch2:
316      - remove "simulationMode" from arg. list of S/R EXCH2_RX1,2_CUBE ;
317      - add argument "signOption" to EXCH2_RX1_CUBE (will be needed for SM exch).
318    o pkg/autodiff & exch2:
319      process exch_uv_agrid_3d_rx.f & exch2_uv_agrid_3d_rx.f through TAF
320      (for now, only if ALLOW_EXCH2 is defined).
321    o pkg/autodiff:
322      - include PACKAGES_CONFIG.h in exch*ad.flow & exch*ad.F
323        (not supposed to be in CPP_OPTIONS.h) to get ALLOW_EXCH2 defined correctly.
324       + clean-up comments (_RS is not always real*4)
325      - fix bug in ADEXCH_UV_3D_RX (without EXCH2, was calling the forward exch S/R)
326      - add a stop in ADEXCH_UV_AGRID_3D_RX if trying to use it with EXCH2:
327        was calling a forward exch2, which is wrong ; used in SEAICE & EXF pkgs.
328    o testreport (AD-tests):
329      no longer link files from dir "../input" (1rst link files from
330      "../input_ad.[xx]" if secondary test "xx" and then from "../input_ad")
331    
332    checkpoint62f (2010/04/29)
333    o model/src/the_main_loop.F:
334      adjust store directives for seaice evp and multicategory according to
335      pkg/ecco/the_main_loop.F
336    o adjoint:
337      global_sum_ad was incomplete (noted many times by many people ;)
338      nice description by Jean U. as follows:
339      * allreduce(var) in global_sum.F can be interpreted as
340        reduce(sum) followed by broadcast of sum.
341      * The adjoint of that is
342        sum(adjoint) followed by broadcast(summed adjoint value)
343        or in other words, allreduce(sum, adjoint vars)
344      We were missing the sum(adjoint)!
345      Benign, except(!) for "global" scalars appearing in tile loops (bi,bj)
346      (noted by J.M. Campin, e.g., in cost_ssh_mean, variable offset).
347      The fix should produce 16-digit accuracy between
348      single-CPU multi-tile (e.g. nSx=2, nPx=1) and
349      multi-CPU single-tile (e.g. nSx=1, nPx-2)
350      We'll probably change this yet again shortly
351    o eesupp/src:
352      - fix global_sum_r4 (wrong from previous modif in Jun 2009; ever used ?)
353    o pkg/icefront
354      - ALLOW_SUBGLACIAL_RUNOFF option adds capability for time-evolving
355        specification of addmass array based on a 2D field, which is added
356        at bottommost wet level at each horizontal location.
357    o model/src:
358     horizontal grid initialisation (other than curvilinear): add code for Exch2 IO
359     layout; (not always compatible with delX,delY setting; commented out for now).
360    o pkg/exch2:
361     change tile to processor setting (case nSy*nPy > 1): allows default model mapping
362     (myX and myYGlobalLow) to be used for simple (1 facet, no blank tile) config.
363    
364    checkpoint62e (2010/04/15)
365    o pkg/obcs:
366      - fix wrong index in OBCS_SPONGE_V for Eastern-OB (reported by David Hebert).
367    o pkg/dic:
368      -fix bug in fe_chem.F for multi-tile (nSx*nSy > 1) set-up;
369        (note: not presently tested in any forward verification exp.)
370       update tutorial_global_oce_biogeo AD output file.
371    o pkg/exf:
372      - account for the variation of albedo as a function of zenith angle
373        by defining ALLOW_ZENITHANGLE in EXF_OPTIONS.h
374    o build_options:
375     - rename "linux_ia64_ifort+mpi_ice_nas" to "linux_amd64_ifort+mpi_ice_nas"
376    o pkg/dic:
377      change DIC atmos-CO2 box (method 3, dic_int1=3) initialisation & restart:
378      - use binary pickup file for restart;
379      - initialise atmos-CO2 box from dic_pCO2 parameter;
380      - fix multi-threaded.
381    o pkg/rbcs:
382     - clean-up RBCS code: add RBCS_OPTIONS.h file ; fix multi-threaded ;
383       change (+ fix IO calls) type of array RBC_mask from _RL to _RS.
384     - add RBCS to exp4 passive tracer 01 (rbcs was previously untested)
385       and update output.txt
386    o pkg/kpp:
387     - add diagnostics for KPP non-local flux of Temp, Salinity and pTracers;
388     - change diagnostic of KPP non-local term: output average of KPPghat*KPPdiffKzS
389       (= ratio of KPP non-local (salt) flux relative to surface-flux) when
390       using pkg/timeave & pkg/diagnostics (diag 'KPPghatK' replaces 'KPPghat ');
391     - change pkg/offline to read-in average KPPghat*KPPdiffKzS from file
392       KPP_ghatKFile (instead of the average of KPPghat from file KPP_ghatFile).
393    o pkg/offline:
394      fix bug in S/R OFFLINE_FIELDS_LOAD regarding surfaceForcing conversion factor
395      (bug was added in version 1.10 on 2007-08-23).
396    o pkg/offline:
397      - no need to specify periodicExternalForcing, etc ... to use offline pack
398      - offline input files no longer just single prec --> parameter offlineLoadPrec
399    o verification/lab_sea:
400      change AD test to multi-tile setup and update all 4 AD output.
401      NOTE: while cost function values remain very similar,
402      gradients are very different, although gradient checks are self-consistent
403      Should try to get to the bottom of this (cost function summation order?)
404    o pkg/dic:
405      in carbon_chem.F, replace log10 (AUTODIFF) with explicit form to avoid
406      a weakness of TAF that drops part of double precision in log10 derivative.
407      <= changes removed since problem has been fixed in current TAF version 1.9.71
408      update AD output of exp. tutorial_dic_adjoffline & tutorial_global_oce_biogeo.
409    o pkg/ecco:
410      add missing "_d 0" in cost_readers.F, cost_readtopex.F & cost_readtopexmean.F
411      update all 4 lab_sea AD output.
412    
413    checkpoint62d (2010/03/22)
414    o build_options:
415      remove '-r8' (and '-i4') from linux_*pgf and linux_*ifort optfiles.
416    o remove unbalanced quote (single or double) in commented line of source code
417      (may cause some warning with some preprocessor/makedepend versions).
418    o pkg/seaice:
419      fix seaice_model.F for adjoint (gael) and update AD results of experiments
420       lab_sea (std + evp + noseaicedyn) and offline_exf_seaice.
421    o testreport:
422      add option '-runonly' (short: '-ro') to just do the run part (without make).
423    o eesupp: remove JAM communication code (obsolete).
424    o add option to genmake2 & testreport to switch "_RS" type to "real*4"
425      (if allowed in CPP_EEOPTIONS.h); update default CPP_EEOPTIONS.h and return
426      to default CPP_EEOPTIONS.h for exp. inverted_barometer & solid-body.cs-32x32x1
427      (update also the output).
428    
429    checkpoint62c (2010/03/02)
430    o tools/build_options :
431       move (some) old optfiles from build_options/ to build_options/unsupported/
432    o model/src and pkg/exf
433       surface relaxation -- separating data and data.exf options
434       The point is to ensure that we specify the surface relaxation
435       either in data or in data.exf (but not half and half) and to
436       avoid an accidental relaxation to 0 (which happened if a time
437       scale was specified but the file name was left empty)
438    o model/src model/inc and pkg/mom_common
439       ALLOW_3D_VISCAH/ALLOW_3D_VISCA4 => 3D specification of Viscosity
440       => addition to the viscosity field as computed by others schemes
441    o tools/build_options:
442      - rename "_generic_mpi" -> "+mpi_generic" (like other "+mpi" optfile)
443        but keep the former optfile for few weeks for smooth transition
444    o pkg/ecco
445      - allow user defined cost function contributions
446         CPP: ALLOW_USERCOST_CONTRIBUTION
447         USAGE: compute contributions in cost_usercost_all.F
448      - note: this is identical to what ALLOW_GENCOST_CONTRIBUTION once was.
449          the two options are complementary.
450    o pkg/smooth
451      - migration from contrib to the main repository
452    
453    checkpoint62b (2010/01/26)
454    o pkg/monitor:
455      - change back mon_printstats_rl.F & mon_stats_rl.F and add a stop
456        (in case someone forgot to update customized pieces of code)
457    o nonHydrostatic:
458      - add Non-hydrostatic free-surface form (selectNHfreeSurf=1)(not fully tested);
459      - add a simple 2-D experiment (short_surf_wave) to test it.
460    o pkg/icefront:
461       adding the shell of, and the hooks to, a new package that
462       will model melting and freezing of vertical glacier ice fronts
463    o momentum:
464      add diagnostics of momentum tendency from Hydrostatic pressure gradient
465       (without surf.pressure term: would need a 2nd filling since implicit term).
466    o add 3 "_d 0"s so that fizhi compiles with xlf on iblade, and replace
467      two " &end" by " &" (in fizhi-cs-*) because S/R NML_SET_TERMINATOR
468      cannot deal with the former
469    o cleaning:
470      - remove all (except OpenAD) old TLM output from results_ad dirs.
471      - remove unused S/R (MDSWRITEMETA, DIAGNOSTICS_ADD2LIST, old DFILE IO S/R)
472      - comment out maskH definition (replaced by maskInC)
473    o pkg/monitor:
474      - change mon_printstats_rl.F & mon_stats_rl.F (were similar to mon_writestats_rl
475        & mon_calc_stats_rl) to be the RL equivalent of mon_printstats_rs & mon_stats_rs.
476    
477    checkpoint62a (2010/01/15)
478    o model/src:
479      - bottom pressure diagnostic: correct for r* (when nonlinFreeSurf >= 4)
480    o pkg/diagnostics:
481      - add optional level number diagnostics (i.e., level number to be define
482        explictly with S/R DIAGNOSTICS_SETKLEV) with parser-code(10)="X".
483      - strictly check for valid parser-code(10) ;
484      - check if adding diag to the list from the right place.
485    o pkg/longstep:
486      - change parameters and fix tracer conservation with rstar/nonlinear free surface
487    o diagnostics:
488     - in all pkgs, replace remaining calls to old S/R DIAGNOSTICS_ADD2LIST with newer
489       S/R DIAGNOSTICS_ADDTOLIST ; fix seaice VICE diagnostics.
490    o pkg/diagnostics:
491     - Add option for writing vertical integral (sum of selected levels) of an output
492        field instead of writing output field levels. Activate this option on a per
493        output-file basis, by setting the 2nd character of fileflag to 'I'.
494     - Add field-specific information relative to level integral in 3rd postion
495        of parser diagnostics code (gdiag): " "=cumulate levels, "R"=integrate
496        vertically (x level-thickness x hFac), "r"=same but without hFac.
497    o do_the_model_io:
498      - pass end-of-model-run flag as argument, from forward_step to diagnostics_write:
499        in case useSIGREG, will write (averaged) diagnostics (if dumpAtLast) before
500        writing pickups and stopping.
501    o pkg/diagnostics (for now, only with mdsio):
502      - write time information to meta file (and modify accordingly rdmds.m) :
503        time-averaged diagnostics output: write starting and ending time of the
504        time-averaging interval ; snap-shot diagnostics output remains unchanged;
505    o pkg/timeave:
506      - S/R TIMEAVE_NORMALIZ: change size of cumulated-time array (was previously
507        always Nr), now assumed to be equal to number of levels of averaged field;
508        only used for DIC_COST monthly mean arrays: this fixes dic_aver_final.F
509    o pkg/sbo:
510      - fix ocean bottom pressure global-average & 2-D time-ave output (was
511        neither initialised nor filled).
512      - add starting iteration in suffix of global-average output file
513        (to avoid over-writing the file after a restart)
514      - use standard MDSIO pkg S/R instead of SBO_WRITEVECTOR (fix byte-swap Pb).
515    o time-average:
516      - use simple cumulative-time array (no k index) in all pkgs: {PKG}_timeAve(bi,bj)
517        (pkgs: aim_v23, bulk_force, dic, gmredi, kpp, land, ocn_compon_interf,
518         ggl90, my82, opps, pp81, ptracers, sbo, seaice, shelfice, thsice)
519        this fix DIC_COST cumulative-time array (previously: bi,bj,k)
520      - fix 1rst call (nIter0) snap-shot output and accumulation (pkg/shelfice)
521      - fix missing accumulation for pkg/opps.
522      - cumulate fields only if doing time-ave output ({PKG}_taveFreq > 0)
523         (pkgs: ptracers, kpp, ocn_compon_interf, ggl90, my82, pp81);
524      - fix initialisation of time-ave vars and do only full time-step increment
525        (i.e.: no first & last "half time-step") (pkgs: ggl90, my82, opps, pp81);
526    o pkg/layers:
527      - use standard RW pkg S/R to write the output
528        and remove local write_fld version (which had a problem).
529      - use simple cumulative-time array (no level index) to fix time-ave S/R calls.
530      - fix LAYERS_CALC argument list.
531    o pkg/timeave:
532      - store cumulative-time in a simple tiled array (drop the level index)
533      - add new S/R (TIMEAVE_NORMALIZE) which uses simple cumulative-time array.
534    o pkg/ocn,aim_compon_interf
535      - changes for multi-threaded coupled run. (tested with ifort-11 on danton)
536    
537    checkpoint62  (2009/12/23)
538    o switch on useOBCSbalance in tutorial_plume_on_slope exp. and update output.
539        (was not previously tested in any other exp.)
540    o pkg/monitor:
541      - clean-up _RL/_RS version: add specific S/R for statistics with mask & volume:
542        mon_writestats_rl/s,F mon_calc_stats_rl/s.F ; will keep the old one
543        (mon_printstats_rl/s,F mon_stats_rl/s.F) just for bare statistics.
544      - use hFac & 2-D mask (instead of 3-D mask + hFac in previous mon_stats_rl.F).
545      - change del2 calculation.
546      - use interior masks (instead of maskH, <- to be remove).
547      - shorter monitor suffix for forcing stats ("forcing" instead of "extforcing").
548    o mask & obcs:
549      - define 2-D "interior" masks (i.e., zero beyond OB) at 3 locations (C, W & S).
550      - move global area computation from ini_masks_etc.F to ini_linear_phisurf.F
551        (called after packages_init_fixed)
552    o pkg/obcs:
553      - move bi,bj loops into obcs_calc, so obcs_prescribe_read is called only once.
554        Fixes bug in obcs+exf with nSx*nSy.GT.1
555      - fix multi-tile handling in obcs balance code
556    o nonHydrostatic:
557      - Implement AB-3 for non-hydrostatic vertical momentum ;
558        (change ordering of var. stored in pickup file when using NH)
559      - move NH code from solve_for_pressure.F to 2 new S/R: PRE_CG3D & POST_CG3D.
560      - add 2-D field to store Hydrostatic Surface Pressure adjusment from cg3d_x
561        (in prep. for new NH free surface form).
562    o pkg/obcs:
563      add files & OB-variables for wVel (Non-Hydrostatic) with useOBCSprescribe
564    o model/src:
565      fix 2-D solver initialisation for deep-atmosphere (p-coord) with topography
566    
567    checkpoint61z (2009/12/01)
568    o nonHydrostatic:
569      Fix missing vertical flux of vert. momentum near surface (k=1). This fixes
570        a spurious source of energy in simple baroclinic adjusment test case.
571      Update all non-hydrostatic exp output.
572    o model/src (3-d solver):
573      Change again 3-D solver free-surface RHS term when exactConserv=T:
574        simpler, consistent with exactConserv, and works with implicDiv2Dflow < 1
575        (which was not the case with previous formulation).
576      To recover previous version, just reset "oldFreeSurfTerm" to previous value.
577      Affects results of exp. global_ocean.cs32x15.viscA4 & hs94.cs-32x32x5.impIGW.
578    o nonHydrostatic:
579      - compatible with implicDiv2Dflow < 1 ; + implement implicit factor
580        for Non-Hydrostatic pressure gradient (similar to implicSurfPress).
581      - change 3-D solver to work with r* (for now, only with linear free-surf.)
582      - add few debug diagnostics (cg3d_x, residual)
583    o model/src:
584      fix missing EmPmR in 3-D solver RHS (was in cg2d_b but missing in cg3d_b).
585        update output of exp. global_ocean.cs32x15.viscA4
586    o update output of exp. global_ocean.cs32x15.icedyn after removing
587      #define SEAICE_OLD_AND_BAD_DISCRETIZATION from SEAICE_OPTIONS.h
588    o add entry points for Gianmaria's Nesting pkgs (from Contrib/nesting_sannino)
589    o mnc: add horizontal grid coordinates (XC,YC) and (XG,YG) to netcdf output
590      for complex grids, for now only to "state", "adstate", "adexf", "adseaice"
591    o model: add Christopher Wolfe's implemetation of the single reduction cg2d
592      (d'Azevedo, Eijkhout, and Romine, 1999) with CPP-flag ALLOW_SRCG and
593      runtime flag useSRCGSolver. Modify verification experiment global_with_exf
594      to test this code
595    o pkg/cd_code:
596      Change defaut D-grid time-stepping to get the same for D-grid momentum as for
597       C-grid momentum. D-grid velocity used to be stepped forward in time with
598       Adams-Bashforth only on surface pressure term. Tests show that using AB on
599       D-grid coriolis term improves stability (as expected from CD-scheme paper).
600      To reproduce old results, add 2 options (in CD_CODE_OPTIONS.h).
601      Update results of exp: global_with_exf (x2), ideal_2D_oce, isomip (x2),
602       lab_sea (3 Fwd +3 AD), natl_box (x2), tutorial_global_oce_biogeo (Fwd+AD),
603       tutorial_global_oce_latlon, tutorial_global_oce_optim & tutorial_tracer_adjsens.
604      Keep old results by adding CD_CODE_OPTIONS.h in exp: cfc_example, exp2,
605           global_ocean.90x40x15(+AD), global_ocean_ebm(+AD) and OpenAD.
606    o pkg/obcs:
607     - fix bug in initialisation (broken since Oct 1rst modification)
608       for useOBCSprescribe without useEXF.
609    
610    checkpoint61y (2009/11/15)
611    o pkg/seaice
612     - change (once again) the discretization for the evp solver: rather than
613       squaring the averages of strain rates, average the squares to give
614       a better approximation to VP behavior (in simple test); this breaks
615       verification experiments that use EVP (lab_sea and lab_sea.hb87)
616        --> update outputs
617    o add CPP-flag (in mom_calc_visc.F) and TAF directive (in gmredi_slope_limit)
618      to improve vectorization of adjoint code on TARGET_NEC_SX
619    o verification/vermix:
620      - change vermix to a more "classical" 1d column with high vertical
621        resolution, seasonal heat flux forcing and constant wind forcing
622        --> update outputs
623    o pkg/seaice
624     - fix diagnostics of principal stress components for EVP
625     - add optional diagnostics of non-linear convergence for LSOR solver
626     - make maximum zeta a runtime parameter
627    o model/src (3-d solver):
628      Undo modif from Dec 12, 2005 (solve_for_pressure.F cvs version v.49),
629       which consisted in removing the Surf. Non-Hydrostatic pressure from the
630       whole column and adding it to Eta (inspired from Casualli, 1999):
631       Only affects 3-D solver initial guess and only if using ExactConserv,
632       but tests did show a degradation of solver convergence. For this reason,
633       decide to disable this piece of code.
634       to recover previous version, just set zeroPsNH = exactConserv (line 78).
635      Update output of exp. global_ocean.cs32x15.viscA4 & hs94.cs-32x32x5.impIGW
636    o pkg/ggl90:
637     - fix previous modif (unfortunatly has not been documented here).
638    o pkg/seaice/autodiff:
639     - add CPP flag to include clipping of zeta in EVP code;
640       although clipping of zeta is not necessary for EVP and not recommended
641       it was done by default, now clipping is disabled by default
642     - modify computation and store zetaC/Z in seaice_evp for TAF
643     - add CPP-flag SEAICE_ALLOW_CLIPVELS (undefined by default)
644     - change seaice_calc_viscosities/strainrates for better
645       vectorization after AD by TAF
646     - rearrange common blocks in SEAICE.h once again for easier dumps of
647       adjoint output, adjust adcommon.h and g_common.h
648     - change flux form of default advection scheme for better vectorization
649       of adjoint code
650     - modify lab_sea/input.lsr to test the flux form of default advection
651       scheme
652    o autodiff: fix seaice fields in g_common.h (left over from 3 to 1 level
653      transition in checkpoint61r)
654    
655    checkpoint61x (2009/10/19)
656    o adjoint: adding two new verification experiments
657      * tutorial_global_biogeo: an online dic sensitivity experiment
658        (work with G. Forget)
659      * tutorial_dic_adjoffline: an offline dic sensitivity experiment
660        (an update of the Dutkiewicz et al., 2006 paper)
661      Both use the same CO2FLUX cost function, but different controls
662      Gradient checks look good, but some recomp. could still be traightened out
663      Should add xx_dic control variable to test at some point
664    o model/src:
665      add run-time parameters to check and/or mask initial Temp & Salt
666    o pkg/ptracers:
667      apply zonal filter (if used) to all passive tracers
668    
669    checkpoint61w (2009/10/12)
670    o adjoint:
671      * update and finish work on adjoint of dic package (G. Forget)
672      * start adjoint of offline package
673      * bug fix for cube-sphere TLM code (active_file_g.F)
674    o tutorial_global_oce_optim:
675      now tested with 4 tiles (change data.grdchk and update output_adm.txt)
676      and add SIZE.h_mpi for MPI testing
677    o pkg autodiff
678     - fix bug in autodiff_restore
679     - make genmake2 remove comments and empty lines from ad_input_code.f in
680       order to reduce file size (new script file remove_comments_sed)
681    o allows to specify vertical profile of vertical viscosity (viscArNr)
682    o pkg autodiff
683      autodiff_ini_model_io: comment out writing of grid information to netcdf
684      files, because at this time the grid fields are a bunch of zeros
685      (this is analogous to ini_mnc_vars.F)
686    o pkg seaice/autodiff:
687     left-over from removing the 3-time-level fields:
688     - small rearrangement of common blocks (SEAICE.h)
689     - fix field declaration in order to get meaningful output in
690       adseaice.*.nc (adcommon.h)
691    o pkg obcs:
692     - go through NH code only if nonHydrostatic=T
693     - fix restart for Orlanski (Hydrostatic; still to fix NH+Orlanski restart)
694     - move call to OBCS_CALC before SEAICE_MODEL which needs seaice-obc fields
695       => Update output of experiment seaice_obcs
696     - useOBCSbalance: code is wrong with multi-tile / proc: add a stop.
697     - fix NH+Orlanski restart (add wvel OBC value in pickup file)
698     - fix restart for useOBCSprescribe + useEXF
699    o pkg ctrl
700     - make obcs as control parameter work also with useSingleCPUio
701     - replace a few sny and snx by Ny and Nx to be consistent with
702       ctrl_set_globfld_x/yz.F
703    o pkg seaice
704     - re-introduce global field frWtrAtm for the case of
705       ALLOW_MEAN_SFLUX_COST_CONTRIBUTION defined (SEAICE.h, seaice_growth.F)
706     - catch the case of an empty filename in seaice_cost_init_fixed.F
707    o pkg ecco:
708     - small bug fixes in the_main_loop
709      . fix order of monitor arguments
710      . change SEAICE_MULTILEVEL to SEAICE_MULTICATEGORY
711      . move include DYNVARS.h up outside the ALLOW_AUTODIFF_TAMC block so
712        that ALLOW_ECCO_FORWARD_RUN works with NONLIN_FRSURF
713     - replace cos(yc*deg2rad) by _rA in cost_mean_heat/saltflux.F, fix the
714       imbalance diagnostics for wmean_h/sflux = 0
715     - add actual values to f_obcsn/s/w/e in ecco_cost_final.F
716     - catch the case of empty filenames in ecco_cost_init_fixed.F
717       and ecco_readparms.F
718     - fix the logic of wsalt=0.and.wsalt2=0 to wsalt=0.or.wsalt2=0 (and theta)
719       to make this statement meaningfull in ecco_cost_weights.F
720    o pkg zonal_filt:
721      - change ZONAL_FILTER S/R interface (allows to filter 2-D fields)
722      - when using rStar, filter uVel*hFacW instead of uVel
723       (tested without topography: fix a Pb of growing instability with NLFS)
724    o pkg/aim/thsice:
725     -Add capacity to read a Q-Flux to be applied in slab-mixed layer thsice_slab_ocean.F
726      (works as SST restoring)
727    o pkg/thsice:
728     -add specific parameter for salt restoring in slab mixed-layer
729       (by default equal to the temperature restoring)
730    
731    checkpoint61v (2009/09/21)
732    o pkg/kpp:
733     -add double diffusive contributions as a hack, turned off by default
734      for now, and the code can be excluded with a CPP-flag
735      EXCLUDE_KPP_DOUBLEDIFF just as EXCLUDE_KPP_SHEAR_MIX
736     -add a verification experiments to "vermix" to test this code
737    o pkg/mom_common:
738      Move computation of length scales to mom_init_fixed.F (avoid recomputation
739      at each time-steps*levels).
740    o pkg/layers:
741      Created a new package for computing volume fluxes in temperature or
742      [not yet implemented] density layers, e.g. for calculating residual
743      overturning circulations.
744    o pkg/diagnostics:
745      implement a RS type version for the set of DIAGNOSTICS-FILL subroutines
746    o fix few RS/RL type mismatch (check with ifort 11.1 "-warn all" option)
747    o pkg/mdsio (& pkg/rw): rework high level S/R interface:
748      To avoid mixing type (RS/RL) of input/output array argument,
749      replace single mixed-type array with a pair from each type (RS/RL).
750    o setting pickupSuff force to start from a pickup (even if nIter0=0): this
751      is now implemented for all pkgs (previously only done for the main pickup)
752    
753    checkpoint61u (2009/08/25)
754    o pkg/obcs:
755      - change OB?eta from _RS to _RL and put them into a separate commen block
756      - add code to read OB?eta from a file via obcs_prescribe_read: the code
757        compiles and does not destroy any other experiments, the data is read
758        properly, but the code is not tested in actual applications
759    o ini_mnc_vars.F: if available (ALLOW_CAL), use startTime_1 and 2 to
760      create a meaningful unit attribute for the time coordinate variable
761    o pkg/ebm: add plenty of missing "_d 0" ;
762       update results of experiment global_ocean_ebm (fwd + adjoint tests)
763      Notes: several pieces of code only works for (very) specific set up
764       (domain size, lat range, etc ...); should be documented & stop if one
765       of those assumptions is not meet.
766    o pkg/seaice: add missing "_d 0" in HSNOW initialisation
767       update results of experiments: lab_sea (3 fwd tests + 2 adjoint tests)
768          and offline_exf_seaice (seaicetd + adjoint).
769    o add missing "_d 0" in ShortWave flux penetration (S/R SWFRAC):
770       update results of experiments: lab_sea (4 fwd tests + 3 adjoint),
771        seaice_obcs, global_ocean.cs32x15 (icedyn & thsice) and natl_box (x2).
772    o few changes to pass when compiling with strick checking of arguments
773       across S/R (allow to find few bugs in S/R calls).
774    o pkg/seaice:
775     - seaice_evp: move if-statement out of loop (TEM) at the cost of 11 new
776       2d-fields, for slightly better performance
777    
778    checkpoint61t (2009/07/22)
779    o pkg/seaice:
780     - remove unused variables in seaice_evp
781     - reduce number of SQRT in seaice_evp and seaice_calc_viscosities
782    o eeset_parms.F, open_copy_data_file.F & ini_parms.F:
783       named file replacing SCRATCH files (for TARGET_BGL & TARGET_CRAYXT):
784       each processor opens a different file (a fix from Matt).
785    o cg2d:
786       use simple EXCH (overlap size = 1 and ignore corners), like in cg3d.F :
787       this reduces number of EXCH calls by 2 when using exch2.
788       For now, keep previous size array for gc2d_nsa.F to avoid Pb with store
789       directives and missing simple EXCH (exch_s3d_rx) adjoint code.
790    o pkg/thsice:
791       add code for Near Infra-Red albedo (from Jeff)
792       (turned on with run-time flag: thSIce_calc_albNIR, in data.ice).
793    o ini_model_io:
794       move (from packages_readparms.F & initialise_fixed.F) to ini_model_io.F
795       MNC & MONITOR initialisation calls; move MNC calls from {pkg}_readparms.F
796       to {pkg}_init_fixed.F for {pkg}= kpp, seaice & shelfice.
797    
798    checkpoint61s (2009/06/30)
799    o pkg/exch2 (exch2_rxN_cube*):
800       remove last BARRIER (no need to synchronise after getting data from shared
801       buffer (get) as long as any change to buffer (put,recv) is between BARRIER)
802    o change tiling of natl_box (from 2 to 4 tiles) to get it tested with MPI+MTH
803      and generate new output (for the 2 tests) using default rotationPeriod.
804    o pkg/exch2:
805      - always call exch2_*_cube, not exch-1 anymore, if useCubedSphereExchange=F
806        (was already the case with AUTODIFF_EXCH2 defined)
807      - add bj in exch2 arrays and S/R.
808      - can now use pkg/exch2 for regular (non CS) set-up; switch test experiment
809        MLAdjust to exch2 (identical results except with MPI -> truncation diff);
810    o add pkg/longstep for ptracer timestep a multiple of U/V/T/S timestep
811      - adds deltaT argument to the subroutines TIMESTEP_TRACER DWNSLP_APPLY
812        GAD_ADVECTION GAD_CALC_RHS GAD_IMPLICIT_R GAD_SOM_ADVECT
813      - verification experiment natl_box.longstep
814    o build_options: ifort+mpi_aces optfile (following Constantinos advise):
815      allow different versions of ifort (8 or 9) and different versions
816       of mpi (mpich or mpich2) to be used with the same optfile.
817      requires to load a netcdf module and set MPI_INC_DIR (see comments inside
818       optfile). Change testing scripts (example_scripts/ACESgrid) accordingly.
819    o pkg/seaice:
820      fix previous modif (3-level field removed) for old-pickup reading
821    
822    checkpoint61r (2009/06/25)
823    o pkg/seaice:
824     - clean up the 3-time levels of UICE,VICE,HEFF,AREA in three steps:
825      1. introduce fields for time step (N-1)
826      2. do not use levels 2 and 3 anymore (but keep them)
827      3. replace 3D versions of UICE,VICE,HEFF,AREA by 2D versions. This
828         includes changes to pkg/thsice/thsice_get_velocity.F,
829         model/src/external_forcing_surf.F, pkg/obcs/obcs_apply_seaice.F, and
830         pkg/obcs/obcs_apply_uvice.F.
831     - completely remove code for leap-frog time stepping for second order
832       advection
833     - adjusted adjoint accordingly;
834       gradient checks have improved by an order of magnitude!
835    
836    checkpoint61q (2009/06/22)
837    o pkg/seaice: fix bug in free slip boundary conditons for LSOR solver
838     - the boundary conditions along open boundaries are unclear, because the
839       associated masks are set to zero and are thus treated as closed when
840       applying the slip-boundary conditions.
841     - move initialisation of grid variables from seaice_init_varia to _fixed
842    o adding doc/diags_changes.txt
843    o model/src:
844      do_the_model_io: rename few pkg S/R which are called from do_the_model_io,
845       to avoid "_diags" naming if no relation to pkg/diagnostics.
846      ini_theta,ini_salt: fix (at least compile the code) reading from NetCDF
847       file and only call PLOT_FIELD_XYZ if debugMode=T.
848      remove few PLOT_FIELD_XY calls outside initialisation.
849      remove few unnecessary BARRIER.
850    o pkg/salt_plume: add SaltPlumeSouthernOcean to allow disabling
851      of salt_plume package in Southern Ocean
852    o pkg/thsice:
853     - fix hOceMxL in overlap (needed for sea-ice advection);
854       update output of experiment global_ocean.cs32x15.icedyn.
855    o pkg/seaice:
856     - make the (placeholder-)tracer IceAge a little more meaningful
857      by avoiding ridging of age due to convergent ice flow
858     - add diagnostics for surface temperature, atmospheric and oceanic
859       heat flux, and atmospheric and oceanic ice growth
860    
861    checkpoint61p (2009/06/10)
862    o eesupp (global_max & global_sum):
863     - add one more element to buffer (start at index 0) for GL_MAX/SUM output;
864     - remove starting & endding barrier (no longer needed)
865    o pkg/mdsio, writelocal:
866       works also in multi-threaded when LOCBIN_IO_THREAD_SAFE is undefined
867       (remove the STOP): uses shared buffer IO to store data from all threads
868       and then let master-thread write nThreads tiles.
869    o pkg/mdsio (read/write field):
870     - tiled IO done in 1 piece (all levels at a time);
871     - new header file "MDSIO_BUFF_3D.h" with 3-D buffers.
872     - multi-threaded: allow to read/write local (non-shared) array
873       (was already working with singleCpuIO ; now works also without);
874       => no longer needs barrier call after reading a file (added inside
875       mds_read/write field).
876     - move barrier calls outside gather/scatter_2d to mds_read/write_field
877    o pkg/obcs/exf
878      - exf_getffieldrec.F: add a few ". _d 0" and
879                            add code to catch the case fldperiod = 0.  
880      - obcs_precribe_read.F: change if statements so that they match
881                              the variable type (_RL)
882      - add a separate exf_iprec_obcs to exf_set_obcs (by default equal to
883        exf_iprec) as part of namelist EXF_NML_01
884    o pkg/mdsio:
885      - read/write tiled (local) files: read/write 1-level tile chunk at a time
886        (instead of segment of length sNx); expected to speed up tiled IO.
887    o pkg/exch2:
888      - take buffer copy from/to array out of S/R exch2_send/recv into new
889        S/R exch2_put/get ; Exch of local variable now works with MPI+MTH
890        (tested by removing commom block statement in SOLVE_FOR_PRESSURE.h).
891      - ad version of send/recv no longer needed (but needs exch2_ad_put/ad_get)
892      - simplify argument list of S/R exch2_get_uv_bounds and exch2_get_scal_bounds
893        (which replaces exch2_get_recv_bounds & exch2_get_send_bounds) by
894        including Topology header file (and common blocks).
895      - implement EXCH_IGNORE_CORNERS in scalar exchange (rx1);
896        remove 2nd exch call in exch2_s3d_rx (no longer needed).
897      - document S/R arg. list (+ update some comments)
898    o pkg/seaice:
899      - added SEAICE_CLIM_AIR code, which permits modulation of surface air
900        temperature and humidity over sea ice based on climatological values.
901      - clean up computation of Hibler+Bryan (1987) stress coupling for the case
902        of LSR (this change is expected to change the results slightly because now
903        it uses slightly difference moduli from the second last LSR solution, but
904        that is more consistent with the stress computations; this part of the code
905        is not tested in the verification experiments)
906      - fix diagnostics for flux of ice in case of B-grid
907      - turn strain rates eij and press into global fields within global
908        common block in SEAICE.h for more straighforward diagnostics
909      - fix diagnostics for principal stress components, press, zeta, eta
910        to give something meaning full
911    o change tiling of global_ocean.cs32x15 (12 tiles, 32x16) and generate
912      new output (all 4 tests) using default rotationPeriod.
913    o pkg KPP:
914      - add flag (LimitHblStable) to avoid limiting BL depth under stable conditions
915      - fix vertical indices in RI_IWMIX (match between KPP grid from 0 to Nr+1
916        and normal grid from 1 to Nr)
917    o Fix computations of L4rdt in mom_calc_visc.F
918    o eesupp:
919      new S/R ALL_PROC_DIE (like EEDIE, without irrelevant threads err msg):
920      should be called before a "stop" if we know that all process are going
921      to stop; if one Proc does call this S/R, will hang in MPI_FINALISE.
922    
923    checkpoint61o (2009/05/26)
924    o pkg/exch2: change check_depths to issue just a warning (instead of error+stop)
925    o model/src/ini_curvilinear_grid.F:
926       compute angleSin/CosC when they are not read from a file
927    o pkg/seaice:
928       add pseudo time stepping for LSOR
929    o pkg/exch2:
930       temporary fix for exch2_s3d_rx; update results of exp. hs94.cs-32x32x5.impIGW
931    o pkg/seaice:
932       Adding separate sea ice albedo, drag coefficients, and HO in Southern
933       Ocean from those in Arctic Ocean.  See *_south in SEAICE_PARAMS.h
934    o SingleCpuIO:
935       fix bug put before chkp61n (May 11), when more than 2 MPI cpu are used.
936    o pkg/seaice:
937       put exchanged variable in (local) common block for MPI+Multi-Threads
938       to work (necessary with exch1, and for now with exch2 too).
939    o verification: to get more experiments tested with mpi, mth and mpi+mth,
940      change tiling of:
941       aim.5l_Equatorial_Channel, aim.5l_LatLon, dome, exp4, global_ocean.90x40x15,
942       hs94.cs-32x32x5, MLAdjust, offline_exf_seaice & tutorial_plume_on_slope
943      update output of exp:
944       exp4, global_ocean.90x40x15(+.dwslp), MLAdjust(all 5),
945       tutorial_plume_on_slope and hs94.cs-32x32x5 (use default rotationPeriod)
946      + ideal_2D_ocean: use default rotation period + test Global_Sum_SINGLECPU
947                       (note: output.txt generated on faulks using only 1 tile)
948    o eesupp & mdsio (SingleCpuIO):
949     - remove MISSING_TILE_IO (from MDSIO_OPTIONS.h), replaced by run-time
950       parameter "W2_useE2ioLayOut" (read from file "data.exch2").
951       Note: was not effective for globalFile & useSingleCpuIO=F; now fixed.
952     - move MDSIO_SCPU.h (pkg/mdsio) to EEBUFF_SCPU.h (eesupp/inc).
953     - fix GLOBAL_SUM_SINGLECPU when using Exch2; re-use same buffers and same
954       gather/scatter S/R as with SingleCpuIO (=> 1 less 2D global RL array).
955    o pkg/exch2:
956     - new code to set-up W2-Exch2 topology (replace matlab-topology-generator):
957       read parameter file "data.exch2" if it exists; otherwise try default regular
958       cube without blank-tile; new header file "W2_EXCH2_SIZE.h";
959     - update matlab-topology-generator (exch2_setup_cs6_print.m) to be compatible
960       with new code (not to be used, just as a backup solution).
961     - add examples (e.g., for lat-lon-cap_120) of parameter file "data.exch2"
962       in utils/exch2/input.
963    
964    checkpoint61n (2009/05/12)
965    o eesupp & mdsio (SingleCpuIO):
966      - move mapping to global io-buffer inside gather_2d/scater_2d: this save
967        memory (1 less 2D global RL array); skip 1 buffer copy; and only send/
968        receive real*4 array (instead of real*8) to read/write 32.bit files.
969        (new template for gather_2d/scater_2d, new set of S/R MDS_PASS_R4,8toRL,S
970         and remove new mapping S/R)
971    o pkg/mdsio: in preparation for topology-generator within pkg/exch2:
972      - Change declaration of SingleCpuIO buffer, reduced to only 1 dim.:
973        xyBuffer_size, which is set to W2_ioBufferSize from W2_EXCH2_PARAMS.h
974        when using exch2. Add S/R to map global io-buffer to global model array.
975      - uses exch2_global_Nx,y instead of exch2_domain_nxt,nyt.
976    
977    checkpoint61m (2009/04/29)
978    o write_utils : change WRITE_1D_R8 to WRITE_1D_RL
979      and add 3 other S/R for other types (R4,R8,RS).
980      Change calls to WRITE_0D/1D_R[4,8,S,L] to match the type of argument.
981    o eesupp/inc/CPP_EEMACROS.h (EXCH & GLOBAL_SUM/MAX macros):
982     - ensure suffix (_R4,_R8,_RS,_RL) correspondance between macro and S/R ;
983     - reduce number of macro definitions (keep only those which are used);
984       can always call directly the corrresponding S/R if needed.
985     - everywhere in the code: change macros (EXCH & GLOBAL_SUM/MAX) suffix
986       _R4/_R8 to _RS/_RL when applied to _RS/_RL variable.
987     Fixed wrong type of arg in:
988       atm2d/put_ocnvars.F cheapaml/cheapaml.F ocn_compon_interf/ocn_apply_import.F
989       ctrl/ctrl_map_ini_ecco.F seaice/seaice_do_diags.F seaice/seaice_model.F
990     To fix: global_sum of var in common block is wrong (multi-threaded) in:
991       dic/dic_atmos.F ebm/ebm_area_t.F ebm/ebm_zonalmean.F sbo/sbo_calc.F
992     To fix: aim_v23/aim_do_co2.F (BARRIER & GLOBAL_SUM within bi,bj loops)
993    o adjustment.cs-32x32x1: test "blank tiles" when compiling with mpi; 2nd
994      "nlfs" mpi test is going to stop when checking for unconnected tile egdes.
995    o eesupp/src: new S/R to stop everyone when 1 (or more) Proc. find an error
996    o pkg/exch2: new S/R EXCH2_CHECK_DEPTHS to check that unconnected tile
997      edges are closed (zero depth); might happen with "blank tiles";
998      for now, disabled if using OBCS.
999    o tools/gemake2: delete modifs from March 27-29 2009 (with option "-mpi":
1000      link *_mpi files from "MODS" dir) to return to a strait-forward behavior.
1001    o move read_write.F to write_utils.F ; new parameter (maxLengthPrt1D)
1002      to reduce length of 1.D array print in STDOUT.
1003    o adjustment.cs-32x32x1: changed to oceanic test with 1 continent
1004      + use 48 tiles (16x8): this will allow to test "blank tiles".
1005    o start to test MPI + multi-threaded (change testreport to skip tests
1006      where number of tiles do not match).
1007    o genmake2: add option "-omp" to turn on Open-MP ;
1008      passed to testreport (if using -mth) ; merge few (*+mth) optfiles.
1009    o pkg/exch2 (+ utils/exch2): ignore blank tiles (instead of removing them)
1010      and keep the original tile numbering. Note: compatible with old
1011      W2_EXCH2_TOPOLOGY.h & w2_e2setup.F topology files.
1012    
1013    checkpoint61l (2009/04/07)
1014    o Overlaps had been forgotten in calculating ijk keys : fixed
1015    o fix cyrus makedepend for gcc 4.4
1016    o experiment fizhi-cs-aqualev20:
1017      switching to new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE)
1018      and generate new output. Note: new output is much closer to the old
1019      one (v1.8) generated with pgf77 -O2 on Mar 14 2007 than it is from
1020      the previous one (v1.9) generated with pgf77 -O0 on Jun 13 2007.
1021    o pkg/fizhi:
1022     - change to avoid indices going deliberately over array-bounds
1023     - remove unnecessary MPI stuff
1024     - perpetual spring equinox with "#define FIZHI_USE_FIXED_DAY"
1025     - new version of S/R GETPWHERE available with #define TRY_NEW_GETPWHERE:
1026       does not go over array-bounds and therefore returns reliable output.
1027     - in fizhi_driver.F & fizhi_turb.F, fix "get_alarm" calls:
1028       this S/R has 4 output arguments, which are used inside "get_alarm";
1029       when it is called with the same variable "ndum" in place of several
1030       output arguments, this produces weird side effect inside "get_alarm"
1031      (e.g., datein=dates(n) is overwritten by timein=times(n) since both
1032       datein & timein, resp. 2nd and 3rd arg., are pointed to the same "ndum"
1033       address) and produces error.
1034    o tools/gemake2: (March 27-29 2009)
1035      with option "-mpi": link *_mpi files from "MODS" dir (this is what
1036      testreport does).
1037    o lab_sea experiment: change from 2x1 tiles to 2x2 tiles and regenerate output
1038    o pkg/seaice: fix bug in new version of S/R SEAICE_LSR.F:
1039       update lab_sea.lsr & lab_sea.salt_plume results
1040    o pkg/seaice:
1041      Major overhaul of the LSOR solver: change discretization from original
1042      finite differences to finite volume. The old routine is still in the
1043      file seaice_lsr.F and can be turned on with the CPP-flag
1044      SEAICE_OLD_AND_BAD_DISCRETIZATION
1045      Along with this change, the discretization of the strain rates is changed.
1046      The same flag turns on the old discretization in seaice_calc_strainrates.F
1047      All verification experiments with seaice are affected (except for
1048      seaice_exf_offline); global_ocean.cs32x15/input.icedyn recovers the old
1049      results by setting the above flag.
1050      Further changes involve changes in defaults:
1051      - ALLOW_FLOODING is defined and turned on by default
1052      - SEAICEadvSnow = .true. is now the default
1053      - SEAICEadvSalt = .true. is now the default
1054      - SEAICEadvAge  = .true. is now the default
1055      - SEAICE_clipVelocities  = .false. is now the default
1056                                         (as per J. Zhang's recommendation)
1057      - B-grid, and thus not tested: SEAICE_TEST_ICE_STRESS_1/EXPLICIT_SSH_SLOPE
1058        is defined, SEAICE_TEST_ICE_STRESS_1 is renamed into SEAICE_BICE_STRESS
1059      - seaice_growth: replace computation of UG by a simple copy from wspeed
1060    
1061    checkpoint61k (2009/03/18)
1062    o pkg/seaice: a few bug fixes mostly concerning the metric terms:
1063      seaice_lsr: fixed a few metric terms,
1064                  affects lab_sea.lsr, lab_sea.salt_plume, seaice_obcs
1065                  add more debugging diagnostics
1066      seaice_evp: removed superfluous many metric terms of FV discretization
1067                  of stress divergence
1068                  affects lab_sea, lab_sea.hb87
1069      seaice_ocean_stress: removed superfluous many metric terms of FV discretization
1070                  of stress divergence for non-evp solver
1071                  (this part is not tested anywhere)
1072      seaice_calc_strainrates: fixed a bug in no-slip boundary conditions,
1073                  they were effectively only half slip
1074                  affects lab_sea.hb87
1075      updated all relevant verification experiments (except lab_sea//output_adm.txt
1076        which was left over, but fails at level 7 & 6)
1077    
1078    checkpoint61j (2009/03/17)
1079    o pkg/seaice: turn a few hard wired parameters into run time parameters
1080    o pkg/seaice/exf/monitor: turn netcdf coordinate variable T into model
1081      time in seconds as promised by the usints in seaice_monitor and exf_monitor
1082    o pkg/mnc: fix the coordinate variables for multi-tile curvi-linear grids
1083      that are not cubed-sphere grids
1084    o pkg/seaice: fix a bug for the rare case of SEAICE_VECTORIZE_LSR
1085    o pkg/ctrl:
1086      fix bug in ctrl_depth_ini.F (EXCH_XYZ was applied to 2-D field xx_r_low)
1087    o non-hydrostatic (calc_gw.F):
1088      fix viscA4 on CS-grid + fix diagnostics: Wm_Diss & Wm_Advec
1089      update output of exp. global_ocean.cs32x15.viscA4
1090    o remove backward compatibility for thetaMin,phiMin
1091      (replaced by xgOrigin,ygOrigin on Jan 27, 2009)
1092    o pkg/exf: fix a serious bug in exf_set_uv.F: do a rotation of the
1093      interpolated wind field not only for curvilineargrid=.true., but also
1094      for a rotated grid (rotateGrid=.true.)
1095    o pkg/exf: add capability to bypass interpolation for runoff
1096      by setting yet another CPP-flag
1097    o eesupp/src, B-grid exchange:
1098      add simple (6 tiles, non MPI) CS exch + standard interface S/R.
1099    o autodiff
1100      new CPP option ALLOW_TAMC_SINGLEPREC_COMLEV
1101      allows to switch to single-prec common blocks;
1102      corresponding switch occurs in tamc.h, integer isbyte
1103      TAF store directivs "byte" and "kind" seem equivalent;
1104      Most tamc.h have been updated correspondingly.
1105    
1106    checkpoint61i (2009/02/13)
1107    o autodiff:
1108      fix autodiff_sore/_restore indices for obcs
1109      (spotted by I. Hoteit, M. Mazloff)
1110    o pkg/autodiff, pkg/ctrl:
1111      Add flag to reduce all tapelev I/O to single-prec.
1112      In data.ctrl set
1113        doSinglePrecTapelev = .TRUE.
1114    o model/src/ini_curvilinear_grid.F, new grid-file format without EXCH2:
1115      check in hack for SX8 compiler (for dxV, dyU); remove it afterwards.
1116    o pkg/shelfice: fix bug with SHELFICEconserve flag, prepare for
1117      real fresh water flux (not yet)
1118    o pkg/mdsio & rw:
1119     - add argument & option to S/R MDS_WRITEVEC_LOC (avoid Open/Close & write-meta)
1120     - add simple interface S/R to MDS_WRITEVEC_LOC in pkg/rw: WRITE_GLVEC_RX.
1121    o pkg/flt:
1122     - replace FLT_INIT by 3-steps standard initialization S/R: readparms,
1123       init_fixed & ini_varia.
1124     - clean-up & simplify linear interpolation S/R:
1125       move flt_bilinear.F -> flt_interp_linear.F ; add arg. myThid.
1126     - fix some indices (mainly vertical index) ; add IMPLICIT NONE.
1127     - more efficient I/O, using new options of MDS_WRITEVEC_LOC S/R.
1128     - add vert. coordinate & horiz. indices to output files.
1129     - change vertical position in initial condition, from index to depth [m].
1130     - store horizontal (decimal) indices i,j in common block (instead of coord. x,y)
1131       (easier to get to a curvilinear grid) ; delX,delY no longer used.
1132    o pkg/ggl90: a few modifications:
1133     - fix bottom boundary condition, and interpolation of KappaE
1134       near top and bottom
1135     - use same set of viscosity/diffusivity for TKE/momnetum/tracer
1136     - add smoothing option as in Blanke and Delecluse (1993) (--> ALLOW_GGL90_SMOOTH)
1137     - add a few options for mixing-length upper limit (--> mxlMaxFlag)  
1138    o rename thetaMin,phiMin -> xgOrigin,ygOrigin
1139      (maintain temporary backward compatibility, until next checkpoint)
1140    
1141    checkpoint61h (2009/01/27)
1142    o pkg/diagnostics with "periodic averaging diagnostics":
1143      fix S/R DIAGNOSTICS_COUNT ; hack diagnostics_out.F to get NetCDF output.
1144    o pkg/my82: add missing "_d 0" ; update output of exp. vermix.my82
1145    o pkg/obcs: fix loop ranges for balancing code
1146    o pkg/flt:
1147     - improve criteria for finding which tile owns a float.
1148     - fix FLT_EXCH for case without MPI ; apply cyclic BC + fix also the MPI case.
1149    o Add well-mixed CO2 box in aim_v23 (which includes changes in pkg
1150      aim_compon_interf, ocn_compon_interf, gchem, and dic to get coupling
1151      with ocean biogeo)
1152    o pkg/flt:
1153     - do some cleaning and fix the restart ;
1154     - add output.txt in flt_example/results to get this pkg tested.
1155    o genmake2: add an EXTENDED_SRC option and flag.
1156       for now, cannot be turned on on command line (only through genmake_local)
1157    o pkg/mdsio: read/write vector:
1158     - singleCpuIO: fix RL/RS in MDSWRITEVECTOR by calling new S/R MDS_BUFFERtoRL/RS
1159     - singleCpuIO=F: fix arrType & filePrec & _BYTESWAPIO in both MDSREADVECTOR
1160       & MDSWRITEVECTOR by calling new S/R MDS_RD/WR_VEC_RL/RS.
1161     - affects gradient of test-exp "bottom_ctrl_5x5" (not due to _BYTESWAPIO)
1162      (drop to 4 digits matching for grad). But this test does not look very
1163      reliable (was already failling on eddy, fc5, at 6.digits). Update output.
1164    
1165    checkpoint61g (2008/12/29)
1166    o pkg/flt:
1167      - move FLT_CPPOPTIONS.h to FLT_OPTIONS.h (standard name)
1168       + make OPTIONS file more standard.
1169      - rename S/R MDSREADVECTOR_FLT to FLT_MDSREADVECTOR (to mach src file name)
1170      - fix _BYTESWAPIO CPP-Flag
1171      - standard reading of file-parameter "data.flt"
1172      - fix argument list of S/R FLT_RESTART
1173      still need to fix _BYTESWAPIO in pkg/mdsio/mdsio_writevector.F
1174    o pkg/obcs: fix a CPP-flag, bug reported by Jeff Blundell
1175    o gather_2d.F/scatter_2d.F: suppress vectorisation on NEC SX in respond to
1176      a still unfixed compiler/optimization bug
1177    
1178    checkpoint61f (2008/11/21)
1179    o pkg/seaice, LSR solver: fix bug in GLOBAL_MAX calls ;
1180      update results of global_ocean.cs32x15.icedyn test.
1181    o move getcon.F from model/src to pkg/fizhi.
1182    o pkg/exf: add parameter for extrapolation of temp up to the surface
1183       and option to prevent negative evap (in bulk_largeyeager04 only).
1184    o Prather Advection scheme: fix tracer conservation for divergent flow
1185      (e.g., when using NonLin Free-Surface).
1186    o kpp: retire KPPmld diagnostics --> use MXLDEPTH instead
1187    o gmredi (Visbeck-variable-K):
1188     - add more parameters to Visbeck-variable-K.
1189     - use a 5 points average for dSigmaR in Visbeck-K calculation
1190       (more "homogenous": same stencil and same weights as in dSigmaH)
1191     - update output of ideal_2D_oce experiment.
1192    o fix CPP-flag REAL4_IS_SLOW, when _RS expands into real*4
1193      (#undef REAL4_IS_SLOW)
1194     - pkg/mnc/mnc_cw_cvars.F: write _RS-grid variable as netcdf-real*4
1195       coordinate variable
1196     - pkg/monitor/monitor.F: call mon_printstats_rs for _RS variables
1197       (surface forcing fields), removes some of the functionality
1198     - model/src/write_grid.F: write _RS variables as RS-netcdf variables
1199     - model/src/diags_oceanic_surf_flux.F: fix a few diagnostics, but
1200       probably not all: copy _RS surface flux fields to RL field before
1201       calling DIAGNOSTICS_FILL
1202     - model/inc/CPP_EEMACROS.h: make the _EXCH_*_RS macros expand into
1203       real*4 (CALL EXCH_*_RS) versions.
1204     - tested in 2 experiments: inverted_barometer & solid-body.cs-32x32x1
1205       (generate new output).
1206    
1207    checkpoint61e (2008/10/23)
1208    o gmredi (Visbeck-variable-K):
1209      - fix the "OLD_VISBECK_CALC" option + move the #undef to GMREDI_OPTIONS.h
1210      - change computation of Visbeck-K where Slope > Smax :        
1211        now: N*min(Slope,Smax) (similar to OLD_VISBECK_CALC with gkw91 taperFct)
1212        previously was: M*sqrt(min(Slope,Smax)) ; update ideal_2D_oce output.
1213    o bottom-drag in P-coord.: change units of bottomDragLinear & bottomDragQuadratic
1214      to be the same as with Z-coord. (i.e., m/s & no-units respectively).
1215    o calc_viscosity: fix index range (was wrong for CD-Scheme & explicit Visc)
1216    o pkg gmredi, linear & fm07 tapering: put an upper limit on Slope^2 so that Kwz
1217      does not become too large (to avoid precision problems in implicit-diffusion
1218      solver); update ideal_2D_oce output.
1219    o pkg ggl90:
1220      - in ggl90_cal.F: compute only one set of visc/diff, used to
1221        step forward TKE/T/S/momentum
1222      - default value of GGL90viscMax/GGL90diffMax larger and equal (to
1223        have Prandlt =1)
1224    o gmredi (fm07):
1225      - add lower limit on Transition layer thickness + lower limit on 1/lambda
1226      - allow to set few more params from data.gmredi
1227    o pkg ggl90:
1228          - add missing sqrt(2) factor in computation of mixing length
1229            scale in ggl90_calc.F
1230            (see Eq. (2.35) in Blanke and Delecluse, JPO, 1993)
1231    
1232    checkpoint61d (2008/09/25)
1233    o adjoint modifs
1234      - adapt to new field rhoInSitu
1235      - allow to revert from StoreDynVars2D, StoreDynVars3D
1236        to individual fields
1237        (switches AUTODIFF_USE_OLDSTORE_2D, AUTODIFF_USE_OLDSTORE_3D)
1238    o store 3-D (in-situ) density in commom block (DYNVARS.h)
1239     - save 1 rho computation.
1240     - no longer modify T & S inland when using down_slope pkg.
1241    o gad_som : allow to switch to SOM advection for T & S without corresponding
1242      pickup files (using new S/R: MDS_CHECK4FILE).
1243    o keep removing _BEGIN/_END_MASTER between MDSIO S/R call
1244      (for useSingleCpuIO to work in multi-threaded)
1245    o pkg/shelfice:
1246     - disentangle parameters: retire shelfIceFile in data/PARM05 and substitute
1247       with SHELFICEtopoFile in data.shelfice
1248     - move code for reading ice shelf topography and modifying hFacC into separate
1249       subroutines of the shelfice package
1250     - separate initialisation of "fixed" and "variable" variables
1251     - kTopC is not (yet) replaced by kSurfC, although this is possible
1252    o fix broken diagnostic SIatmFW and changed the units from m/s to kg/m^2/s
1253    o add initialisation of deepFac if using Pcoords (new S/R set_grid_factors)
1254      and rename:
1255      ini_phiref.F          --> set_ref_state.F  (+ set anelastic factors)
1256      ini_reference_state.F --> load_ref_files.F (- set anelastic factors)
1257    o change FIND_RHO_SCALAR : return rho (instead of rho - rhoConst)
1258    
1259    checkpoint61c (2008/08/30)
1260    o add option ALLOW_ADDFLUID and run-time selector "selectAddFluid"
1261      to add mass source/sink of fluid in the interior (3-D generalisation
1262      of oceanic real-fresh water flux).
1263    o pkg/monitor: fix recip_dr argument in mon_advcflw2 call (-> advcfl_W_hf_max)
1264    o vermix test experiment: switch from LINEAR EOS to MDJWF (not tested before)
1265    o new pkg: down_slope
1266      density-driven downsloping flow parameterisation (Tellus, 1999, 412-430).
1267      - presently, modify T & S inland (dwnslp_calc_rho.F).
1268        can be avoided if rho was stored in common bloc and used in calc_phi_hyd.
1269      - implementation for ocean in P-coords not tested.
1270      - add secondary test to global_ocean.90x40x15 (input.dwnslp) to check this pkg.
1271    o move kSurfC,kSurfW & kSurfS from SURFACE.h to GRID.h (next to kLowC)
1272      (to facilitate conversion of oceanic pkg to p-coordinate).
1273    o change FIND_RHO to FIND_RHO_2D :
1274      pass arguments tFld & sFld as local (tile) 2D-arrays ; +fix EOS_CHECK.
1275    o new pkg: cheapaml
1276    
1277    checkpoint61b (2008/08/05)
1278    o exch2:
1279      change index bounds in rx2_cube exchanges (new S/R: EXCH2_GET_UV_BOUNDS)
1280      - no longer depend on the order sequence (N,S,E,W).
1281      - 3rd exchange no longer needed (tested with 24 tiles).
1282      - same modif to hand-written adjoint S/R (global_ocean.cs32x15: zero diff)
1283      - exch_UV_A-grid readily available (but not yet tested).
1284      comment out 3rd exch call and remove copy of V to U at SE & NE face-corners
1285      (both are no longer needed) in exch_uv: no effect in forward run; but
1286       get truncation error differences with adjoint exch.
1287    o exch2:
1288     - change index-bounds storage (moved from target to local tile,
1289       more intuitive this way) ; rename/remove some variables.
1290     - change utils/exch2/matlab-topology-generator & code_mods accordingly.
1291    
1292    checkpoint61a (2008/07/29)
1293    o exch2/matlab-topology-generator:
1294      fix bug in index bounds for N-S internal exchange (hard to tell if this
1295      had any effect on the solution).
1296    o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
1297      is exceeded
1298    o testreport: modify syntax of awk, so that it works also with
1299      awk, and not only with nawk and gawk
1300    
1301    checkpoint61 (2008/06/24)
1302    o autodiff
1303      Change default for TAF usage by removing argument '-nonew_arg'
1304      This changes TAF subroutine argument list (ordering of active var.)
1305      Omission of this flag leads to incompatibility w.r.t. TAMC
1306      To restore TAMC-compatibility, need following modifs:
1307      * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
1308      * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
1309      Tested TAF version is 1.9.22
1310      N.B.: exch2 hand-written adjoint code currently not TAMC compatible
1311    
1312    checkpoint60 (2008/06/19)
1313    --->>> This is the last checkpoint for which generating the adjoint
1314    --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
1315    --->>> by default.
1316    --->>> Future checkpoints will ommit this flag by default.
1317    o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
1318    o pkg/grdchk: Add gradient check to etan0 perturbations.
1319    o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
1320    o pkg/autodiff: more flexibility in zeroadj.
1321      model/src: modifying do_oceanic_phys.F accordingly.
1322    o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
1323    o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
1324      special setup of gmredi for which the adjoint is stable
1325      enough for parameter optimization.
1326    o bridging the gap between eddy stress and GM.
1327      -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
1328          along with a change in CPP option (now ALLOW_EDDYPSI).
1329      -> when using GM w/ GM_AdvForm:
1330          The total eddy streamfunction (Psi = eddyPsi + K x Slope)
1331          is applied either in the tracer Eq. or in momentum Eq.
1332          depending on data.gmredi (intro. GM_InMomAsStress).
1333      -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
1334      The key modifications are in model/src/taueddy_external_forcing.F
1335      pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
1336    
1337    checkpoint59r (2008/05/29)
1338    o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
1339      from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
1340      fix option to read coriolis(@ cell-corner) from files with CS-grid.
1341    o pkg/mnc: add some attributes to standard 1D-coordinate variables
1342    o pkg/diagnostics: enforce missing_value attribute for scalar variables at
1343      mass points, when using mnc for output
1344      - add runtime parameter (missing_value, missing_value_int) to override
1345        default (which is the value of getcon('UNDEF'))
1346    o pkg/mnc: prepare mnc for the actual use of missing values with the
1347      diagnostics package: small fix in mnc_cw_readwrite.template and more
1348      initialisation of never used fields
1349      - replace mnc_common.h and mnc_id_header.h with corresponding upper case
1350      versions
1351    o pkg/thsice/thsice_ini_vars.F added default initial values so that
1352      thermodynamics sea ice solver does not blow up when some initial fields
1353      are missing.
1354    o move from external_forcing_surf.F to ini_forcing.F
1355      the p-coord. hack consisting in using pLoad to set phi0surf ;
1356      update output of tutorial_global_oce_in_p (affected @ truncation level).
1357    o Freshen up a bit hs94.1x64x5, notably:
1358      remove rotationPeriod and tRef=5*0. (adjoint only), and add
1359      exactConserv=.TRUE.
1360    o pkg/generic_advdiff:
1361      change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
1362      applies to files where Temperature & Salinity 2nd Order moments are used.
1363    o pkg/ptracers: add second-order moment advection schemes (80 and 81);
1364      this uses a dynamically allocated internal state data structure
1365      (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
1366      and requires a fortran 90 compiler
1367    
1368    checkpoint59q (2008/05/06)
1369    o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
1370       (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
1371    o Refresh tutorial_global_oce_biogeo, notably:
1372      - change bathymetry (put back seamounts in ACC, use hFacs)
1373      - change EOS (POLY3 --> JMD95Z)
1374      - use Bryan-Lewis vertical diffusivity
1375      - use multidimensional advection
1376      - remove old virtual virtual in dic pkg, now done through ptracer pkg
1377      - change a couple of parameters in dic pkg
1378    o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
1379    o pkg/obcs: change default to OBCSfixTopo = .true.,
1380      - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
1381      - replace "debugMode" with "debugLevel .GE. debLevB"
1382    o implementation of TAF directives for gchem,cfc,dic
1383    o remove "exp5" (replaced by tutorial_deep_convection).
1384    o pkg/obcs: add code to fix topography gradients normal to open boundaries;
1385      this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
1386      the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
1387      --> changes results in exp4, seaice_obcs
1388    o tutorial_deep_convection :
1389      update the set-up and increase resolution and domain size ; start
1390      from pseudo initial conditions = output at t=120mn in order to see
1391      something happening when running testreport.
1392    o pkg/seaice: add os7mp as an advection scheme
1393                  add check for advection schemes
1394                  add a flag for restoring T and S underneath sea ice
1395    o pkg/my82: add netcdf-support and diagnostics
1396    o thsice pkg:
1397      - Now hsMax limits snow height by turning it into ice following
1398        flooding scheme (and now conserving energy)
1399      - Slight rewriting of the formula in thsice_calc_thick.F
1400      - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
1401      --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
1402    
1403    checkpoint59p (2008/04/10)
1404    o gchem / dic / cfc :
1405      - add useDIC, useCFC , read from "data.gchem" (& hold in GCHEM.h);
1406      - add new parameter files: "data.dic" & "data.cfc" ;
1407      - various re-arrangement in initialisation & header file ;
1408      - fix tutorial_global_oce_biogeo for multi-threaded test.
1409    o pkg/dic: test for "pickup_dic" file when restarting ;
1410      if no pickup-file, can restart with a re-initialised pH (same as it did
1411      before) providing pickupStrictlyMatch is set to False.
1412    o change argument list of S/R PTRACERS_WRITE_PICKUP & MYPACKAGE_WRITE_PICKUP
1413      + fix call to S/R GGL90_WRITE_PICKUP & DIC_WRITE_PICKUP
1414    o add a "warning" (to Error msg file) when an Active Tracer is not using AB-2
1415      and staggerTimeStep is off (needed for stability of Internal-wave dynamics).
1416    o move out of PARAMS.h & data the last pieces of old-ptracer code: tauTr1ClimRelax,
1417     & lambdaTr1ClimRelax ; put those 2 params in PTRACERS_PARAMS.h & data.ptracers
1418       (note: not clear to me what lambdaTr1ClimRelax is still used for ...)
1419    o pkg/mom_vecinv: - new parameter "selectVortScheme" to select which
1420       scheme to use for vorticty-term ;
1421     - compute upwindVorticity=T case within mom_vi_u/v_coriolis_c4.F
1422       (with default selectVortScheme, return to original discretisation)
1423     - remove weird combination (e.g.: upwindVorticity & highOrderVorticity)
1424    o pkg/seaice: add a line to the summary to indicate grid type (B/C)
1425    o in mom_calc_visc, fix average value of viscAh_W & viscA4_W next to the
1426      bottom ; only used with variable horizontal viscosity and non-hydrostatic.
1427      also fix diagnostics VISCAHW & VISCA4W.
1428    
1429    checkpoint59o (2008/03/07)
1430    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
1431    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
1432      move a few statemens out the main loop into separate loops
1433    o pkg/shelfice:
1434      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
1435        (kg/m^2/s), does not break tests, because in verification/isomip,
1436        rhoConstFresh=rhoConst (by accident)
1437      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
1438      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
1439        new file model/src/seawater.F, so that they are available for all pkgs.
1440      - convert potential temperature into in-situ temperature. This changes the
1441        isomip tests => update tests
1442    o add a flag writePickupAtEnd (default=true) to be able to suppress
1443      writing a pickup at the last timestep
1444    o tools/mpack-1.6 :
1445      - disable automake (not working) and autoconf (not needed).
1446      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
1447        also cleaner with much less compilation warnings.
1448    o pkg/profiles:
1449      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
1450      (for "less than 32 characters name" compiler requirement)
1451    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
1452      conditions that have a different sampling frequency than S/T/U/V obcs
1453    o pkg/diagnostics (stats-diags):
1454      - fix global Min/Max in case 1 processor get only empty tiles
1455    o genmake2: replace (4 times)
1456         make genmake_tc_1.o >> genmake_warnings 2>&1
1457      with
1458         COMM="$CC $CFLAGS -c genmake_tc_1.c"
1459         echo $COMM >> genmake_warnings
1460         $COMM >> genmake_warnings 2>&1
1461      to make genmake2 always see the value of CC as specified in the optfile.
1462    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
1463      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
1464      - modify verification advect_cs test to test SOM-advection on CS-grid.
1465    o pkg/ctrl:
1466      - Rewrite of ctrl_map_ini_ecco.F,
1467        introducing a generic routine (ctrl_map_ini_gen.F).
1468      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
1469    
1470    checkpoint59n (2008/02/09)
1471    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
1472      number in dedicate array "hdiag":
1473      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
1474        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
1475      - many small changes (integer format) for large number of diagnostics
1476      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
1477        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
1478    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
1479      usingSphericalGrid, this allows to define the rotated grid coordinates
1480      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
1481      geographical coordinates according to the inverse of the rotation defined
1482      by the Euler angles, so that Coriolis parameter and online-interpolation by
1483      exf works with the geographical coordinates on XC/YC/XG/YG.
1484      Naturally, this feature does not work with all packages, so some
1485      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
1486      profiles), because there the coordinates are assumed to be regular
1487      spherical grid coordinates.
1488    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
1489      - introduce isopycnal diffusion coefficient control.
1490    o tools/adjoint_options:
1491      - additional control vector components.
1492    o pkg/mnc: have mnc create marginally meaning full coordinate variables
1493      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
1494    o pkg/mypackage:
1495      - add example of read/write pickup for state-var ;
1496      - add entry points to the main code for state-vars diags & write-pickup.
1497    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
1498      transitions for useExfYearlyFields
1499      - add new subroutine that determines the file to read from for
1500        use*YearlyFields = .TRUE. and .FALSE.
1501      - add a verification experiment to global_with_exf that tests
1502        useExfYearlyFields with USE_EXF_INTERPOLATION defined
1503    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
1504      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
1505      subroutines (which could be generated from a template, because they are
1506      almost identical), for now they are included in obcs_prescribe_read.F for
1507      simplicity
1508    o pkg/exf:
1509      - add a little more diagnostic to exf_interp_read (in analogy to
1510        mds_read_field, can be turned off with debugLevel < debugLevA=1)
1511      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
1512        ugly but fast by unrolling short inner loops, inserting a unroll=8
1513        directive in routine lagran, and splitting a loop and making do while the
1514        outermost loop (the latter requires the intoduction of index arrays)
1515    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
1516    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
1517      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
1518    o verification/seaice_obcs: updated for restart test and latest options
1519    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
1520      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
1521      for now this is only available for the C-grid code and also within
1522      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
1523    
1524    checkpoint59m (2008/01/14)
1525    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
1526      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
1527    o gad_som : fix flux output (& diagnostics) to have same units as other  
1528      advection scheme fluxes (was previously multiplied by deltaT).  
1529    o added verification/seaice_obcs both to test seaice open boundaries
1530      and to provide an example matlab scrpt for generating them
1531    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
1532    o pkg/salt_plume: clean up salt_plume_frac.F to
1533      remove redundancy in PlumeMethod 1 and 4
1534    o pkg/kpp: added saltplume diagnostics
1535    o pkg/obcs and pkg/seaice:
1536      - do not set uice and vice to zero when OB*icefile are unspecified
1537      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
1538      - moved seaice tracer obcs after call to seaice_growth
1539    o pkg/salt_plume: added various options for salt plume depth
1540      criterion and for vertical distribution of the salt
1541    
1542    checkpoint59l (2007/12/18)
1543    o pkg/ptracers: new version of ptracers pickup:
1544      read meta file and write only fields which are needed to restart.
1545      ( same logic as main pickup file ; also using pickupStrictlyMatch )
1546    o pkg/seaice:
1547      - add timescale for melting due to warm mixed layer as a means of
1548        setting SEAICE_availHeatFrac more conveniently
1549      - add a CPP-flag/runtime parameter check for flooding algorithm
1550      - reformulated availHeat in seaice_growth.F to be independent of AREA
1551    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
1552      unit changes
1553    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
1554    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
1555      SX vector computer.
1556    o pkg/seaice:
1557      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
1558        seaice forcing fields can now be read only through pkg/exf
1559      - removed some unused halos
1560    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
1561    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
1562      or U/VICE from U/VWIND before computing U/VSTRESS
1563    
1564    checkpoint59k (2007/11/30)
1565    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
1566      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
1567    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
1568      all experiments pass when compile with un-initialised var. checking option.
1569    o added pkg/salt_plume
1570    o script to test restart (for now, in MITgcm_contrib/jmc_script)
1571    o pkg/seaice: new read/write pickup version.
1572      read meta file and write only fields which are needed to restart.
1573      ( same logic as main pickup file ; also using pickupStrictlyMatch )
1574    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
1575    o lab_sea.hb87: modify the domain & update output.hb87.txt :
1576      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
1577      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
1578      process. Fixed here by closing the domain at the Northern boundary.
1579    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
1580    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
1581      a set of consecutive levels in/from a 3-D array.
1582    o pkg/ptracers:
1583      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
1584      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
1585    
1586    checkpoint59j (2007/11/09)
1587    o in pkgs: dic, obcs, offline, rbcs:
1588      standard way to compute coeff. for time interpolation between 2 time reccords
1589      which retains full precision (& make results less dependent on compiler).
1590      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
1591    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
1592      packages instead of reading ice cover and wind speed separately
1593    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
1594     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
1595      to allow to compile customized code before the update)
1596    o cleaning-up:
1597      - fix CPP instruction syntax in pkg/obcs
1598      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
1599        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
1600      - fix some threads issue in IO parts.
1601    o pkg/dic:
1602      - add tons of "_d 0" (--> much better testreports !)
1603       and then update outputs of tutorial_global_oce_biogeo
1604    o pkg/mom_fluxform:
1605      add a special version of momentum advection intended to conserve momentum
1606      next to a bathymetry step or a coastline edge. (default = off = #undef)
1607    o new read/write pickup version:
1608      - for now, only implemented for main (mdsio) pickup file.
1609      - write out only what is needed to restart; merge pickup_nh , pickup_ph
1610        and main pickup together.
1611      - read meta file; read only what is needed to restart; stop if a field
1612        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
1613        if it make sense (even if the restart is not perfect).
1614      - if no meta file, assume that pickup to read corresponds exactly to
1615        a pickup that would currently be written.
1616      - read pickup written in the old format (until checkpoint59i) if it
1617        recognizes an old meta file (no field-list).
1618      - add a meta file in exp. which starts from a pickup: 2 cases:
1619        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
1620         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
1621        b) a meta file describing the content of the associated pickup file
1622         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
1623    o pkg/mdsio & pkg/rw:
1624      - new routine to read a meta file ; new set of routine to read
1625        Multiple-fields file (with meta file).
1626    o added open boundary conditions capability for seaice
1627        HSNOW, HSALT, UICE, and VICE
1628    
1629    checkpoint59i (2007/10/21)
1630    o adjoint:
1631      * fix multiDimAdvection adjoint
1632        (partial recomputation problem by TAF for fVerT(:,:,kDown)
1633        and comlev1 size definition (maxpass vs. max. number of tracers)
1634      * verification/global_ocean.90x45x15 adjoint now tests
1635        NLFS and multiDimAdvection using DST3 (=30)
1636      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
1637    o pkg/kpp: add "_d 0" to real constant (if missing);
1638      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
1639      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
1640    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
1641      for internal parameters related to restart process (formerly from PARAMS.h)
1642      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
1643    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
1644      as argument. (only atm2d & obcs write_pickup have not yet been updated)
1645    o pkg/monitor:
1646      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
1647      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
1648      - account for deep Atmosphere factor and density factor (anelastic)
1649    o added open boundary conditions capability for seaice HEFF and AREA
1650    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
1651      thermodynamics
1652      - requires a little reorganization, which affects the testreport results
1653        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
1654        so that now the conservative form is tested
1655      - add a few comments
1656    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
1657    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
1658    o add new diagnostics to seaice: advective, diffusive fluxes (only for
1659      multidim-advection, for scheme 2 they are not filled) and transports,
1660      thermodynamic growth rates
1661    o change units of EmPmR (inside the code, + within coupling interface)
1662      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
1663      Affects results @ truncation level (cg2d match) and update output of
1664       experiments: lab_sea(6), global_ocean.90x40x15(10),
1665      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
1666      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
1667      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
1668      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
1669    
1670    checkpoint59h (2007/09/29)
1671    o pkg/exf:
1672      - improve vectorization by moving if-statement out of loops in
1673        exf_mapfields, exf_radiation
1674      - exf_bulkformulae.F: introduce 2D fields and vectorize code
1675    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
1676    o testreport:
1677      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
1678        monitor & update offline_exf_seaice exp. output.
1679      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
1680    o pkg/seaice:
1681      - bug fix in the evp solver: boundary conditions were affected be
1682        masking of zMax/zMin (changes results)
1683      - minor bug fix in boundary conditions in seaice_calc_strainrates
1684        (changes results for no_slip)
1685      - seaice_lsr.F: make interpolation of eta dependent on boundaries
1686      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
1687      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
1688        stress formulation and no-slip boundary conditions
1689    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
1690      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
1691    o pkg/seaice: a first HSALT time stepping equation has been checked in
1692    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
1693      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
1694      without requiring DO-IF statements
1695    o pkg/thsice:
1696      use continuous power-law function for partition of energy between lateral
1697      melting/freezing and thinning/thickening ; old code using step function
1698      still available with #undef THSICE_FRACEN_POWERLAW
1699      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
1700    o testreport: change AD testing : check against results/output_adm.txt
1701      using same scripts as for forward test.
1702    
1703    checkpoint59g (2007/09/17)
1704    o adjoint testing: in preparation for changing testreport:
1705      - output format: cost and grad written on separated lines
1706      - ad output results in directory "results" (instead of "results_ad")
1707    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
1708    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
1709    o pkg/ecco: allow user defined cost function contributions
1710    o testreport:
1711      Allow to choose (per experiment) the list of tested output variables
1712       and the main variable (used to issue a pass/FAIL ) ;
1713      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
1714      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
1715      Also modify printing of summary:
1716       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
1717       b) echo the list of tested variables in the individual summary.txt of
1718          each experiment.
1719    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
1720      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
1721      (but still depend on the tile decompostion of the domain).
1722    o pkg/seaice: change a discretization detail to make the B-grid code
1723      "more symmetric". This change is likely to remove all "ridges/leads" that
1724      where quasi-aligned with the grid in B-grid solutions. It may also be
1725      the solution to the stress coupling issues with the B-grid.
1726    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
1727      remove .cvsignore from input dir. (since testreport no longer run here).
1728    o pkg/thsice:
1729     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
1730     - fix reshaping of sea-ice just after advection:
1731       melt all the ice only if ice-volume is too small.
1732     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
1733       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
1734     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
1735    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
1736      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
1737    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
1738      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
1739      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
1740      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
1741      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
1742      -> update output.txt
1743    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
1744     this affects truncation error: -> update output.txt of exp:
1745      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
1746      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
1747    
1748    checkpoint59f (2007/08/21)
1749    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
1750    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
1751      a bounded range (in forward mode)
1752    o pkg/ecco, ctrl, autodiff and mom_common:
1753     internal parameter controls, completements of implementations
1754    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
1755    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
1756      (not seem any difference in testing results).
1757    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
1758       at face corners.
1759    o pkg/generic_advdiff:
1760     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
1761      loop range indices for computing vertical advection tendency
1762      and do the calculation in the interior only (no overlap) ;
1763      for now, only implemented for SOM advection (to save CPU time).
1764     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
1765    o exch2 adjoint
1766      First set of changes:
1767      - add exch2 hand-written adjoint templates
1768      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
1769        This will require cleanup in pkg/autodiff/*.F
1770        (changed routines currently kept separate in verif. code/)
1771      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
1772        that used to hide exch2 or cubed-sphere specific code
1773        (commented via 'cph-exch2')
1774    o pkg/seaice
1775      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
1776    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
1777       output of global_ocean.cs32x15.thsice .
1778    
1779    checkpoint59e (2007/07/26)
1780    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
1781      for B-grid vector (not yet tested) and C-grid vector (<- only used
1782      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
1783    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
1784      (#ifdef ALLOW_SALT_PLUME)
1785    o gather_2d/scatter_2d: removed halo regions
1786    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
1787      scheme and the corresponding test case (under front_relax dir). For now,
1788      only available with Skew-flux form and not yet tested in realistic set-up.
1789      adjoint: store directives updated, but gradient checks deteriorated,
1790      so maybe GM/Redi adjoint is now broken.
1791    o seaice adjoint
1792      * add AREA, HEFF, HSNOW as control variable
1793        (should not change lab_sea results)
1794      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
1795    o pkg/seaice:
1796      * added computation of saltFlux in seaice_growth;
1797        For time being, sea ice salinity is assumed constant
1798        contribution of snow flooding to freshening of sea ice is neglected.
1799        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
1800        defaults to 0.0 in order to maintain backward compatibility.
1801        Typical values for SEAICE_salinity are 4 to 10 g/kg.
1802      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
1803      * added SEAICE_availHeatFrac, which specifies fraction of surface level
1804        heat content used to melt or grow ice
1805      * commented out cap of HICE: it helps keep ice thinner
1806      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
1807      * applied OBCS T/S mask to HEFFM sea ice mask
1808    
1809    checkpoint59d (2007/06/21)
1810    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
1811     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
1812     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
1813    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
1814     and change default value of parameter "GM_Small_Number";
1815     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
1816       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
1817       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
1818    o pkg/ecco: cost function when applying pkg/smooth to controls
1819    o pkg/ctrl: add forcingPrecond run time parameter
1820    o pkg/seaice:
1821     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
1822     - fix bug in metric terms of u-equation in LSR solver (implicit part),
1823       changes verification/lab_sea
1824     - rearrange implicit part of u-equation in LSR solver to make it easier to
1825       read, understand, and debug. This causes changes at the truncation level.
1826     - fix (serious) bug in the boundary conditions (sign error in the implicit
1827       part) of the LSR solver. Changes all LSR results.
1828     - fixed problem with HSNOW initialization to avoid thick snow when AREA
1829       is initilized with small values - does not change lab_sea results.
1830     - added HsnowFile initialization capability
1831    o pkg/smooth: addition to model/src and pkg/ctrl so allow
1832     initialization of pkg/smooth and application to control vector
1833    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
1834    o dependencies: pkg/profiles requires pkg/cal
1835    o pkg/profiles:
1836     - added option ALLOW_PROFILES_GENERICGRID
1837         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
1838         that interpolation information (grid points and coefficients) is provided
1839         within the netcdf input files.
1840         -> sample matlab scripts can be found in MITgcm_contrib/gael
1841         that allow you to prepare netcdf input files.
1842     - also modified: cleaner include statements, cleaner error print statements,
1843       cleaner stops when error, and more tests of the netcdf input files consistency.
1844    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
1845    o pkg/seaice:
1846     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
1847       requires a new routine: seaice_diagnostics_fill.F
1848     - make sure that seaice does not move if not forced (pressure replacement
1849       method, Hibler and Ip, 1995), changes results
1850     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
1851     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
1852       It is turned off by default (=-1.), because it changes the results.
1853     - make it possible to read AREA from a file, too.
1854    
1855    checkpoint59c (2007/06/04)
1856    o add S/R and diagnostics for oceanic mixed-layer depth
1857    o move GMRedi call after all vertical mixing schemes (including KPP)
1858    o pkg/thsice:
1859     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
1860      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
1861    o pkg/obcs:
1862     - bug fix for balance code
1863    o pkg/seaice:
1864      - allow values of SEAICE_elasticParm > 1
1865      - add new parameter SEAICE_evpTauRelax as an alternative
1866        to SEAICE_elasticParm
1867      - make lsr boundary conditions free slip (by default), changes result
1868      - add code for no slip boundary conditions for lsr
1869      - set minimum of zeta to zero (and not 4e8) (changes results)
1870      - add a cap on AREA after advecting AREA if seaice_growth is not called
1871    o change calculation of Visbeck K:
1872      - no longer depend on tapering scheme; instead, compute slope (limited
1873        by GM_maxSlope). this is equivalent to what was comuted before with
1874        clipping or linear tappering.
1875      - fix vertical averaging (wrong by 1/2 level)
1876      - leave the old version (but will not be maintained) within
1877        #ifdef OLD_VISBECK_CALC / #endif
1878      - update output of exp. ideal_2D_oce
1879    o change error catch in calc_r_star to improve vectorization
1880    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
1881      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
1882    o adjoint:
1883      Re-organized adjoint checkpointing according to Matt Mazloff
1884      (but with modifs/completions/cleanups)
1885      Storing is now bundled into large arrays to optimized I/O
1886      (and second step in cleanup of the_main_loop)
1887    
1888    checkpoint59b (2007/05/16)
1889    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
1890      - export/import (between ocean & coupler) fields needed for ocean DIC.
1891    o pkg/seaice:
1892      - get rid of three more exchanges seaice_calc_viscosities (required
1893        different loop boundaries in seaice_lsr and seaice_ocean_stress)
1894      - bug fix in seaice_ocean_stress (update of lab_sea required)
1895      - reduce loop boundaries to necessary minimum also in seaice_evp
1896      - go back to the old way of computing deltaC/Z as the adjoint likes that
1897        better
1898    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
1899      passive tracer to an Age Tracer) + update output.txt
1900    o pkg/exf:
1901      - implement A-grid / C-grid selection for wind-stress input files.
1902      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
1903      for now, in exf_bulk_largeyeager04.F only :
1904      - change implementation for case where windspeed + 2. components wind-stress
1905        are read-in. AND use rhoConstFresh to convert evap.
1906    o pkg/seaice:
1907      - use correct EXCH_UV for wind-forcing (on A-grid).
1908      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
1909        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
1910    o pkg/exf:
1911      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
1912      EXF_INTERPOLATION:
1913      - merge global_with_exf/code version of exf_interp_read.F
1914        to the main code ;
1915      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
1916        reading the file ; Important: This options needs to be defined to recover
1917        previous code.
1918        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
1919      - no longer loose real*8 precision along the way when using exf_iprec=64.
1920    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
1921      - change discretisation of evp-solver in order to avoid another exchange
1922        (changes lab_sea) and clean up a little
1923      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
1924        help the adjoint (this also changes the results slightly)
1925      - add a few "_d 0" where they had been missing in seaice_evp.F
1926      - cleaning up: remove unused seaice_calc_rhs.F
1927    o pkg/exf: some cleaning-up:
1928      - change various "constants" into runtime parameters
1929      - cleaned-up Large&Yeager04 routine which should eventually
1930        replace exf_bulkformulae.F (changed names of S/R and CPP)
1931        and merged various ALLOW_ATM_WIND options
1932     only used with thsice pkg (in thsice_get_exf.F):
1933      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
1934        which are used when useStabilityFct_overIce=TRUE (= the default)
1935      - change default values of ice & snow emissivity and scale downward LW
1936        by ice & snow emissivity.
1937    o pkg/thsice:
1938     fix few little problems, in thsice_calc_thickn.F:
1939      - growth vertically (and not laterally) if iceFrac == iceMaskMax
1940      - melt only laterally if hIce < hThinIce (as the comments say)
1941      and in thsice_extend.F:
1942      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
1943      - start to form ice as soon as the minimum ice-volume is reachable.
1944     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
1945      and cpl_aim+ocn
1946    o pkg/kpp
1947     - move computation of surface related input fields to KPP into a new
1948       subroutine kpp_forcing_surf.F
1949     - remove wrong (within bi,bj loops) EXCH calls.
1950     - little cleaning (add argument myThid in last position, cvs header ...)
1951     - for now, fix conservation problem by exchanging KPPviscAz (may not
1952       be the best fix)
1953    o pkg/seaice
1954     - check for inconsistent evp parameter/cpp-flag combination
1955     - remove leftover errIO flat for obsolete name list error handling
1956    o OpenAD
1957     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
1958    
1959    checkpoint59a (2007/05/01)
1960    o pkg/seaice: some parameter clarifications and a little bit of clean up
1961    o pkg/thsice: rename run-time parameters:
1962       himin       -> hIceMin
1963       himin0      -> hThinIce
1964       hihig       -> hThickIce
1965       i0          -> i0swFrac
1966       transCoef   -> bMeltCoef
1967       frac_energy -> fracMelting
1968      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
1969       with default values (for now) that do not change the results.
1970      remove old version of thsice vars advection in pkg/seaice.
1971    o in FFIELDS.h:
1972      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
1973      - make pLoad & sIceLoad always available (but still only used if
1974         ATMOSPHERIC_LOADING is #define).
1975    o pkg/kpp: replaced _KPP_RL with _RL
1976    o bug fixes for vertical diffusivity computations when both KPP and
1977        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
1978        are no longer updating the vertical diffusivity array
1979        (passed as argument) but are (re-) setting those arrays.
1980    o pkg/seaice: fix bug in evp solver, while doing that
1981      - change (improve?) discretization of stress computations for both
1982        cgrid-lsr and evp solver
1983      - add a new routine to compute strain rates
1984      - the above changes lab_sea results
1985      - add no slip conditions for evp solver (off by default), lsr-version
1986        may follow
1987      - fix exchange for shear at Z-points (does not change lab_sea)
1988      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
1989        (to force the user to pick a time step since there is not "safe" way
1990        of choosing it)
1991      - add principal stress diagnostics
1992      - rearrange fields for evp a little to avoid having to call a: too many
1993        exchanges and b: exchanges for stress trensor components which we do
1994        not have.
1995      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
1996        of evp, complete rewrite for lsr case (latter is does not yet work
1997        in all cases)
1998    o pkg/kpp: add code to have mixing in shelf ice caverns
1999      - add myThid to all kpp routines (long overdue)
2000    
2001    checkpoint59 (2007/04/19)
2002    o pkg/exf:
2003      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
2004        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
2005      - move exf header files from lower_case.h to UPPER_CASE.h ;
2006        add missing cvs Header & Name
2007      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
2008      - add namelist param. selectStressGridPosition, exf_monFreq
2009      - retire many _CLIM routines, and remove data.exf_clim
2010        + params moved to data.exf
2011        + climsst, climsss now handled by exf_set_gen, i.e.
2012          climss?period=0 refers to constant field,
2013          climss?period=-12 to monthly forcing
2014      - split up namelists in data.exf
2015    o pkg/seaice:
2016      - remove seaice_exch and seaice_exch_uv
2017      - remove superfluous exchange of theta
2018      - add myThid to seaice_budget_ocean/ice
2019      - add new interface for atmospheric wind forcing (C-grid only)
2020        + new routine
2021        + two new field (taux, tauy for stress over ice)
2022        + removed one global field (DAIRN) for C-grid case only
2023    o pkg/thsise
2024      - 2nd set of modifs for thsice adjoint in conjunction with exf
2025    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
2026    
2027    checkpoint58y_post (2007/04/15)
2028    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
2029      vertical diffusivity, similar to that in MOM4; turned on using
2030      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
2031      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
2032    o Added capability for 3D specification of background vertical diffusion
2033      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
2034      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
2035      "data" file that contains the 3D vertical diffusivity coefficients.
2036    o ice dynamics (pkg/seaice) with thsice thermodynamics:
2037      - add code within pkg thsice to advect & diffuse sea-ice fields
2038      similar to (and will replace) what has been added in  seaice_advdiff.F,
2039      but: - conserving Mass, Heat & Salt.
2040           - better when using non-linear advection scheme (not yet fully tested)
2041           - can also be used in atmospheric set-up (for now, only the diffusion).
2042    
2043    checkpoint58x_post (2007/04/04)
2044    o IO option for global-file compact format:
2045      - add options when generating topology (utils/exch2/matlab-topology-generator)
2046      - add I/O capability (pkg/mdsio).
2047      - adapt utils/matlab/rdmds.m to read this format.
2048      for now long-line format not yet supported by pkg/mdsio (& exch2).
2049    o shelfice: add a few diagnostics
2050    
2051    checkpoint58w_post (2007/03/13)
2052    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
2053      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
2054      (and replace horiVertRatio in NH code).
2055      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
2056                         and tutorial_plume_on_slope (sensitive to truncation)
2057    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
2058      directly to drive seaice model (C-grid only)
2059    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
2060     - reintroduce computation of wind from stress,
2061     - compute tau (in exf_bulkformulae.F) from windstress averaged to
2062       mass points to avoid tau = 0
2063     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
2064    o rdmnc.m: make it work with "global" files created with gluemnc
2065    o rdmnc.m : some improvements in dealing with singleton dimension
2066      (tested on all testreport mnc output files).
2067    o genmake2: disable pkg/profiles if netcdf test fails.
2068    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
2069    o move call to cal_readparms up to make calendar parameters/variable available
2070      to all packages
2071    
2072    checkpoint58v_post (2007/02/08)
2073    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
2074      useDynP_inEos_Zc tested.
2075    o pkg/exf: changes to properly interpolate/mask/scale initial fields
2076    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
2077      and portions thereof.  See read_cs.txt for description and examples.
2078    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
2079      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
2080      following the great-circle arc between those 2 points.
2081    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
2082      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
2083    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
2084     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
2085     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
2086     - still needs work (not working with some options ; efficiency to improve)
2087       and serious testing.
2088     - use this scheme for temperature & salinity in 2 advection test exp.:
2089       advect_xy & advect_xz, respectively.
2090    
2091    checkpoint58u_post (2007/01/12)
2092    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
2093    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
2094    o testreport: add option "-skipdir" to skip some test.
2095    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
2096      momentum calculation.
2097    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
2098    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
2099      remove checkpoint.F and the_correction_step.F (no longer used);
2100      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
2101    o add option (linFSConserveTr) to correct for tracer source/sink due to
2102      Linear Free surface
2103    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
2104    o pkg/thsice: fix reading mnc-pickups
2105    
2106    checkpoint58t_post (2006/12/30)
2107    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
2108    o pkg/mdsio:
2109     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
2110       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
2111       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
2112     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
2113     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
2114       either MDS_READ_FIELD or MDS_WRITE_FIELD )
2115     - new S/R (to replace MDSWRITEMETA), which allows to write more
2116       informations (variable names, time ...) to meta files.
2117     - modify rdmds.m to give back the meta file content.
2118    o pkg/diagnostics: change vertical interpolation to be safer, and more
2119       flexible (define p-levels to interpolate to in data.diagnostics);
2120      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
2121       diagnostic pointer.
2122    o pkg/seaice: more cleaning up of seaice_growth, added many comments
2123    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
2124    o fix multi-category seaice:
2125     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
2126       SEAICE_MULTICATEGORY
2127     - fix short wave heat flux
2128    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
2129       and allow to use EVP solver. Change forward lab_sea: test both EVP
2130       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
2131    o Initial check-in of lab_sea adjoint
2132      (very similar to natl_box_adjoint/code_seaice)
2133      * used C-grid and EVP solver
2134      * used KPP, GM/Redi
2135      * uses inAdExact=.TRUE.
2136      * gradient checks fail for both ADM and TLM
2137        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
2138        f.d. gradients actually seem more problematic than ADM, TLM gradients;
2139        issue is related to forward mismatch between g77 an ifort
2140    o pkg/seaice: overhaul of thermodynamics
2141     - growth.F and groatb.F are replaced by new routine seaice_growth.F
2142     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
2143     - move a few global fields out of SEAICE.h into seaice_growth.F and
2144       make them 2D (FICE/QNETO/ ...)
2145     - remove FO (it is the same as QNETO)
2146     - introduce a few local fields to avoid modifying external fields such
2147       as atemp, etc.
2148    
2149    checkpoint58s_post (2006/12/11)
2150    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
2151      changed exf_set_gen.F so that
2152        genperiod=0 means input file is one time-constant field and
2153        genperiod=-12 means input file contains 12 monthly means
2154    o CG2D: use pre-computed solver main-diagonal (stored in common block);
2155      this affects truncation error ; generate new output file for exp. which
2156      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
2157        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
2158        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
2159        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
2160        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
2161        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
2162    o start implementation of deep-atmosphere and anelastic formulation
2163    o verification: remove 2nd copy of input files and use script "prepare_run"
2164      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
2165    o mom_common/vecinv/fluxform: fix a few initialisation isssues
2166    o profiles: fix for multithreaded case
2167    
2168    o diagnostics: rename few diags:
2169      s/'PRESSURE'/'RCENTER '/g
2170      s/'TICE    '/'oceFreez'/g
2171      s/'TAUX    '/'oceTAUX '/g
2172      s/'TAUY    '/'oceTAUY '/g
2173      s/'SWFLUX  '/'oceQsw  '/g
2174      s/DIFx/DFxE/g
2175      s/DIFy/DFyE/g
2176      and add few ocean-forcing diagnostics:
2177      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
2178    o modifications to pkg/seaice/growth.F and budget.F, which change results of
2179      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
2180      as actual snow thickness.  It now refers everywhere to effective snow
2181      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
2182    
2183    checkpoint58r_post (2006/11/17)
2184    o modifications to pkg/seaice/growth.F, which change results of
2185      lab_sea experiment: fixes pertain to melting snow over open water, to
2186      masking EVAP under sea ice, and to using the correct AREA variable for
2187      computations of EVAP, PRECIP, HSNOW, and GHEFF
2188    o add ability to read bathy, salt, and theta using MNC (off by def)
2189    o add flooding algorithm and advection of HSNOW for pkg/seaice;
2190      both are turned off by default and do no change any results
2191    o seaice advection with pkg/thsice: a step toward the use of non-linear
2192      advection scheme, but #ifdef or commented out for now (requires more EXCH).
2193    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
2194      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
2195      in natl_box (affects results @ truncation level: update output.txt)
2196    o multi-threading and IO:
2197      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
2198      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
2199        (needed to work with SingleCpuIO): tested in all verif. exp.
2200    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
2201      affects the results (but none of the verification test uses this scheme).
2202    o Adding some pkg/diagnostics capability to pkg/seaice
2203      (will certainly be subject to changes)
2204    o ctrl: adding new control variables:
2205      lwflux, lwdown, evap, snowprecip, apressure, runoff
2206    
2207    checkpoint58q_post (2006/10/20)
2208    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
2209      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
2210      high_res_cube configuration by 4% on Columbia.
2211    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
2212      add (in global_with_exf/code) a version of EXF_INTERP_READ without
2213      dynamical allocation (seems to work in multi-threaded).
2214    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
2215      single CPU io) so that TAF does not have to see EESUPPORT.h
2216    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
2217    
2218    checkpoint58p_post (2006/09/08)
2219    o obcs: stop if obcs is used with useCDscheme = .true.
2220    o shelfice:
2221     - fix a sign error so that no slip at shelfice interface works
2222     - remove stop for combination non-hydrostatic code and shelfice. That does
2223       not mean, that the results are correct, but at least they are numerically
2224       stable
2225    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
2226    o added adjoint exch routined for all exch*3d* routines
2227      and updated flow directives
2228    
2229    checkpoint58o_post (2006/08/28)
2230    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
2231      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
2232    o change controling S/R for writing pickup file (new S/R do_write_pickup)
2233      and clean-up reading/writing of pickup files.
2234    o fix local version of read/write pickup (NH part) in rotating_tank/code
2235    o simplify EXCH interface:
2236     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
2237     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
2238    o added the regrid package
2239    o shelfice:
2240     - add a simple boundary layer scheme to reduce noise
2241     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
2242    
2243    checkpoint58n_post (2006/08/14)
2244    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
2245       local variable (not in common block).
2246    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
2247      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
2248      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
2249        to work with SingleCpuIO.
2250    o add "_d 0" to real constant of pkg/cfc subroutines ;
2251       update exp. cfc_exemple & tutorial_cfc_offline output files.
2252    o multi-threading and IO:
2253      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
2254        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
2255      - barrier before and after reading.
2256      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
2257      - avoid using MDS_WRITELOCAL for LAND pkg output.
2258      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
2259        common-block variables ; Allows multi-threading with master-thread IO.
2260    o change default MAX_NO_THREADS from 32 to 4 ;
2261      and stop cleanly when MAX_NO_THREADS is too small.
2262    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
2263    
2264    checkpoint58m_post (2006/07/17)
2265    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
2266       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
2267    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
2268       keep global_ocean.90x40x15 (for AD testing) with former secondary test
2269       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
2270    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
2271        add MITgcm_tutorials (= code + all the tutorials)
2272    o ecco, option to compute cost for total ssh (mean+anom)
2273    o consistent with addition of ptracer and ssh in pkg/profiles
2274    o profiles: adding ptracer and ssh
2275    o testreport: change multi-test output-file name
2276      (from output.txt.{name} to output.{name}.txt)
2277    o profiles: now ok for mutli-tiles case
2278    o seaice: add 4 parameters for different advection schemes for area,
2279      (effective) seaice thickness, enthalphy, and snow height. Their default
2280      is the standard parameter SEAICEadvScheme
2281    o calc_gw:
2282     - add cosFacU in zonal viscous flux (harmonic.visc.).
2283     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
2284       of tutorial_plume_on_slope.
2285    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
2286    o calc_gw: true flux-form, account for horizontal grid spacing.
2287      update rotating_tank results, but not plume_on_slope (affected at
2288      truncation level, 11 digits).
2289    
2290    checkpoint58l_post (2006/07/12)
2291    o calc_gw:
2292     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
2293     - remove side-drag for now (need to fix it); update plume_on_slope results.
2294     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
2295    o commit code to make SST/SSS weights spatially variable
2296      (based on either variable in-situ or variable initial T/S weights)
2297    o pkg/ecco:
2298      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
2299        now based on horizontally varying weights wthetaLev, wsaltLev
2300      * cost_averagesflags now returns year indices in addition to day, month
2301      * sflux balance is performed on annual basis
2302        (sflxumm, sfluxmm2, bal_sfluxmm)
2303      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
2304        including separate counting and multipliers
2305    o pkg/rbcs
2306      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
2307    
2308    checkpoint58k_post (2006/07/06)
2309    o testreport:
2310     - always build in dir. "build" (if not there, mkdir build instead of building
2311       & running in input)
2312     - run in dir run (if it exists), in build otherwise.
2313     - call prepare_run (if input/prepare_run exists)
2314     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
2315    o pkg/exf modifications to interpolation and rotation routines for more
2316       reasonable treatment of North Pole singularity: for tracers North Pole
2317       value is set to northernmost zonal-mean value, for zonal velocity it is
2318       set to zero, and for meridional velocity it is set to northernmost value.
2319    o pkg/exf/exf_check_range.F
2320     - add tile index to diagnostics and move stop statement to the very
2321       end of the routine.
2322    o pkg/diagnostics: (diagnostics_main_init.F)
2323      define title of isomorphic variables according to the current config.
2324    o pkg/thsice with pkg/seaice dynamics:
2325    - fix domain of computation (interior only, required for exf) and do exchanges
2326    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
2327    o towards a standard way of dealing with multi-threading in MONITOR
2328      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
2329    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
2330       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
2331    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
2332    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
2333    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
2334       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
2335    o tracer advection:
2336     - clean-up and simplify calc_common_factors.F
2337     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
2338       advection subroutine (but still not used within DST advection S/R)
2339    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
2340    
2341    checkpoint58j_post (2006/06/15)
2342    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
2343      from file (collects calls previously in FORWARD_STEP)
2344    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
2345    o adjoint store dir. adjusted accordingly
2346    o genmake2
2347      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
2348    
2349    checkpoint58i_post (2006/06/14)
2350    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
2351      on wind stress (SEAICEstressFactor defaults to 1.)
2352    o Total number of Timers is finite (<=40): comment out 2 non-essential one
2353      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
2354    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
2355      on CS-grid: no longer loosing mass.
2356    o exf & curvilinear-grid: no longer modify longitude xC & xG.
2357    o pkg/ggl90: fix sloppy output and fix a bug
2358    o pkg/seaice: added SEAICEuseEVPpickup parameter
2359      - Set to false in order to start EVP solver with
2360        non-EVP pickup files when using SEAICEuseEVP
2361      - fix sign error in diffusion in seaice_calc_rhs
2362    
2363    checkpoint58h_post (2006/06/07)
2364    * Modifications for bottom topography control
2365      o replace hFacC by _hFacC at various places
2366      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
2367      o add non-self-adjoint cg2d_nsa
2368      o update autodiff support routines
2369      o re-initialise hfac after ctrl_depth_ini
2370      o works for 5x5 box, doesnt work for global_ocean.90x40x15
2371    * Adding verification for 5x5 box (4-layer) bottom topography control
2372    
2373    checkpoint58g_post (2006/06/07)
2374    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
2375       used for mean seasonal cycle, mean diurnal cycle); add an example
2376       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
2377    o pkg/ggl90:
2378      - add parameter (minimum surface kinetic energy)
2379      - fix bug (avoiding division by zero)
2380    o couple pkg/thsice to pkg/seaice:
2381      - modify advection in seaice to accomodate new scalar fields to be advected
2382      - only muliDimAdection scheme work with seaice/thsice
2383      - mapping of thsice-variables to seaice-variables, back and forth
2384      - does not break the verification experiments, but does not give the
2385        desired results either
2386    o pkg/seaice
2387      - make (default) second order advection a bit less confusing?
2388    
2389    checkpoint58f_post (2006/06/05)
2390    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
2391      to pkg/seaice):
2392      - new routines thsice_map_exf and thsice_get_exf provide the interface
2393      - add an additional formal parameter to thsice_solve4temp
2394    o pkg/exf:
2395      - add new fields wspeed, snowprecip (to be able to couple to thsice)
2396      - correct Stefan-Boltzmann constant
2397      - new parameter for longwave surface emittance
2398      - separate some stuff from exf_bulkformulae into new routines  
2399        exf_radiation, exf_wind
2400      - add new parameters and constants: longwave emissivity for ocean, ice
2401        and snow, evaporation parameters over ice
2402      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
2403        either wind from stress or stress from wind
2404    o pkg/thSIce:
2405    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
2406    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
2407       and THSICE_CALC_THICKN
2408    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
2409    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
2410      to make debugging easier.
2411    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
2412    o pkg/bulk_force:
2413      - clean-up comments and parameters ;
2414      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
2415    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
2416      generate new output for test-experiment: aim.5l_cs.thSI
2417    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
2418      testreport accordingly
2419    
2420    checkpoint58e_post (2006/05/17)
2421    o SEAICE_CGRID adjoint done
2422    o R_STAR adjoint implemented.
2423      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
2424      * need to sort out init. of h0facc, etc.
2425    o Make pkg/profile fully independent of ecco,cost, etc. stuff
2426      to be able to use it in pure forward.
2427    
2428    checkpoint58d_post (2006/04/21)
2429    o upgrade simple test-experiment to tutorial example:
2430     step.1: duplicate the experiment and (step.2) will remove the old copy.
2431      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
2432      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
2433      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
2434      tutorial_global_oce_biogeo    <- copy of dic_example
2435      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
2436      tutorial_plume_on_slope       <- copy of plume_on_slope
2437      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
2438      tutorial_global_oce_optim     <- empty for now (David ?)
2439      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
2440     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
2441    o correct a sign problem in cost_scat.F
2442    o obcs and ptracers: fix boundary conditions for advections schemes
2443      with larger stencil
2444    o thsice adjoint: start
2445    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
2446      completeness
2447    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
2448      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
2449    o ptracers adjoint:
2450      * avoid extensive recomputatations
2451      * fix missing re-init. of gptr (missed by TAF)
2452    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
2453      me to turn off the excessive output to STDOUT that this package produces
2454    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
2455      and add those terms in Vector-Invariant formulation.
2456    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
2457      if the control period (xx_hfluxperiod etc) is 0
2458    o in profiles pkg, clean routines and fix details
2459    o in ecco pkg, reading ssh data:
2460      fix problem in case the model does not start at iter0=0
2461    o fix mnc-pickup/restart for ptracers
2462    o new package prifiles:
2463      code to compute profile-based cost by Gael Forget
2464      (modifs in ecco, ctrl, autodiff)
2465    o Benign bug fix in initialization (spotted by M. Mazloff) of
2466      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
2467    
2468    checkpoint58c_post (2006/03/23)
2469    o adjoint: finish NLFS adjoint and provide reference output in
2470      verification/global_ocean.90x40x15/results_ad_nlfs
2471    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
2472      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
2473      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
2474      with SEAICE_CGRID defined.
2475    o move calendarDumps from "data" to "data.cal" and clean-up the code
2476      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
2477    o add useEXF & useCAL flags (for now, set in hard-coded way)
2478    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
2479      (were missing in NH mode, and wrong in quasihydrostatic mode).
2480      waiting for Chris updated version of calc_gw to add those CALLs.
2481    o fix bug in quasihydrostatic S/R ;
2482      add a test for this option: global_ocean.90x40x15.qshyd
2483    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
2484      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
2485    o add on/off flag useOffLine for package OFFLINE
2486    o seaice:
2487      - modify advection so that it works also on the C-grid
2488      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
2489        problem in multi-tile runs with C-grid
2490      - add flags for clipping ice velocities and/or masking solver forcing
2491      - fix drag (ocean on ice) formulation and a bug that caused noise in the
2492        C-grid solver
2493      - added a few comments to seaice_diffusion.F
2494      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
2495        are now exclusive)
2496      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
2497        required re-ordering the code a little:
2498       + make DAIRN global variable (defined in SEAICE)
2499       + move computation of the viscosities eta and zeta into a new separate
2500         routine (because I need to recompute them in seaice_ocean_stress.F)
2501    
2502    checkpoint58b_post (2006/03/13)
2503    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
2504      update output.txt of exp. aim.5l_cs.thSI
2505    o various mnc cleanups and improvements:
2506      + shrink lookup tables by factor of ~4
2507      + better error reporting when running out of lookup space
2508      + able to handle longer path/file names (up to 500 chars)
2509    o adjoint:
2510      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
2511      - TBD: "hidden" mom_vecinv recomp. in dynamics
2512    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
2513     (allow to differentiate between forcing components using new integer flags:
2514      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
2515     and add new flag to put Dissipation tendency out of Adams-Bashforth.
2516    o ecco
2517      - enable trend removal from SSH anomaly obs.
2518    o adjoint
2519      - a fix for PmEpR when #undef EXACT_CONSERV
2520      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
2521      - try to fix "hidden" recomp. in forward_step for NLFS
2522        (NLFS seems broken sometimes after I checked it in)
2523    o seaice:
2524     - add c-grid version of the dynamic solver:
2525       + three new routines that are the c-grid substitute lsr, dynsolver
2526         and ostres
2527       + put a few fields that were local to dynsolver into global common
2528         blocks, so that I can move the computation of stresses etc into
2529         seaice_lsr (saves coding but may break the adjoint).
2530     - replace more hardwired parameters by runtime parameters
2531     - add ice masks that mask the rhs of the implicit solvers where there
2532       is no ice (commented out in seaice_dynsolver, because i am not sure
2533       if this works properly), eventually this should replace the clipping
2534       of ice velocities in seaice_dynsolver to +/-40cm/s.
2535    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
2536      include it only where its needed
2537    o move balancing of fluxes before the call of external_forcing_surf
2538    o seaice:
2539      - correct units of turning angles (now they are really in degrees)
2540      - move computation of GWATX/Y out of main routine into dynsolver
2541      - initialize GWATX/Y in seaice_init
2542    o Apply mask on Fresh-Water flux (needed for SSH forcing).
2543      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
2544    o seaice: add runtime flags for turning angles (default to zero)
2545    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
2546      and trend from exf forcing and ctrl control adjustments
2547    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
2548      (since checkpoint57x_post)
2549    o change the default rotation period to 86164.s = the Earth rotation
2550    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
2551      and based on a reference stratification. Tested within hs94.cs-32x32x5.
2552    o seaice advection: add code for choosing between the default (2nd order
2553      central differences) and multiDim advection schemes provided by
2554      pkg/generic_advdiff
2555    o seaice:
2556      - removed all references to SEAICE_GRID.h fields from
2557        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
2558        (cubed-sphere configuration will change a little)
2559      - grid computations in seaice_init are obsolete now.
2560      - cleaned up code a little so that is easier to read (hopefully).
2561      - added new (better?) discretizations of default advection and diffusion
2562        (turn on with SEAICEuseFluxForm)
2563      - replace 1 in 3d global fields by kSurface in growth.F
2564      
2565    checkpoint58a_post (2006/02/13)
2566    o seaice:
2567      - bug fix in advect.F
2568    o shelfice:
2569      - separate shelfice load anomaly from pload (breaks with time
2570        dependent forcing), => introduce constant field shelficeLoadAnomaly.
2571        Its default is 0., but it may be computed more cleverly from (unknown)
2572        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
2573        done offline. A good approximation of the pressure load anomaly is
2574        necessary to avoid large initial adjustment processes underneath
2575        deep-reaching shelfice.
2576      - small fix in ISOMIP shelfice_thermodynamics
2577      - add more sophisticated thermodynamics of Hellmer (1989), this is
2578        now the default
2579      - give a few constants more intuitive names
2580    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
2581      if bulk formulae are used in long integration (especially EmPmR). Turn
2582      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
2583      if balancePrintMean, the imbalance that is substracted is printed to
2584      STDOUT.
2585    o fix bug (typo) in obcs_apply_eta.F
2586    o add a new package shelfice which enables us to model the circulation
2587      underneath shelf-ice with draughts of hundreds of meters.
2588     - works
2589     - to do: + include improved thermodynamics
2590              + check whether kSurfC (from model/inc/SURFACE.h) can be used
2591                instead of new field kTopC
2592              + can we use topoFile, Ro_surf and existing code in ini_depth.F
2593                instead of new field R_shelfIce and new code in ini_depth.F
2594                and ini_mask_etc.F?
2595              + adjust vertical mixing schemes?
2596    o seaice pkg:
2597     - add a cpp-flag to include a simple formula for a salinity dependent
2598       freezing point of sea water at the surface
2599     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
2600       meridional stresses are now different (and hopefully correct)
2601    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
2602       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
2603       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
2604    o pkg/diagnostics: add options and parameters for regional-statistics
2605       diagnostics ; define regions by reading a region-mask from a file
2606       (might add other options later)
2607    o pkg/bulk_force:
2608     - add option and parameters to use AIM surface-flux formulae.
2609     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
2610       others forcing fields (defined in PARM05, parameter file "data") are loaded
2611       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
2612     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
2613     - use the right EXCH call for uwind,vwind (to work on CS-grid).
2614     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
2615       and parameters (note: calcWindStress replaces .NOT.readwindstress).
2616     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
2617    
2618    checkpoint58 (2006/01/12)
2619    o add "--embed-source" option to genmake2 which, when the supporting
2620      tools can be compiled (as determined by genmake2) will turn on the
2621      embed_files package which then embeds the entire MITgcm source code
2622      (*.[fFhc] + Makefile) used for the build within the executable
2623      - requested by CNH but off by default
2624      - adds a paltry <9MB to the mitgcmuv executable in most cases
2625      - only writes the output when useEMBEDSRC in eedata is true
2626    o clean up 3-dim. relaxation codes:
2627      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
2628      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
2629      * Thanks to Tom Haine for testing!
2630    
2631    checkpoint57z_post (2005/12/31)
2632    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
2633      affects output (@ truncation level) of exp. plume_on_slope ; updated.
2634    o fix the pickup behavior for obcs in combination with ptracers
2635    o fix a bug in ptracers_external_fields_load
2636    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
2637      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
2638    o transfered surface NH pressure to eta field (if exactConserv).
2639    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
2640         and update lab_sea output.txt file.
2641    o completing 3-dim. relaxation code: additional term
2642         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
2643      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
2644      * At compile time, in "EXF_OPTIONS.h" set
2645          #define  ALLOW_CLIMTEMP_RELAXATION
2646          #define  ALLOW_CLIMSALT_RELAXATION
2647      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
2648          tauThetaClimRelax3Dim = 15552000.0,
2649          tauSaltClimRelax3Dim  = 15552000.0,
2650      * 3 cases:
2651          1) Use a constant-in-time 3-dim. field
2652          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
2653          3) Real-time relax. to time-evolving prescribed field
2654    o Adding Laplacian-type smoothness constraint on
2655      initial and boundary (forcing) controls (ic, bc)
2656      * enable at compile-time via
2657        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
2658      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
2659      * Absolute scale somewhat unclear so far
2660      * no area weighting was included since no other cost term does so far
2661    
2662    checkpoint57y_post (2005/12/08)
2663    First step for a NLFS adjoint
2664    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
2665    o new init. routines for calc_r_star, calc_surf_dr
2666    o still need to deal with ini_masks_etc
2667    o testreport seemed happy
2668    checkpoint57y_pre (2005/12/08)
2669    
2670    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
2671    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
2672    o add new offset feature to offline pkg (plus minor cleanup)
2673    o cfc fixes for final year of integration
2674    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
2675      be in GCHEM_OPTIONS).
2676    
2677    checkpoint57x_post (2005/12/04)
2678    o fix testreport Pb in multiple test experiment.
2679    o cleanup our namelist syntax in verification:
2680      - make it more F95 standards compliant (some work still needed)
2681      - allows the vast majority of our tests to work with gfortran
2682    o Non-Hydrostatic:
2683     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
2684     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
2685    o Allow to apply AB on T,S rather than on AB(gT,gS):
2686     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
2687     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
2688       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
2689     - need a "clever" read_pickup to restart from the other AB formulation
2690    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
2691    o remove some unused variables (reduces number of compiler warnings)
2692    o adjoint
2693      * Disable useVariableViscosity for adjoint for time being
2694        (there are a number of extensive recomputations)
2695      * Initialize certain variables needed for adjoint
2696    
2697    checkpoint57w_post (2005/11/03)
2698    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
2699                 fix the singleCpuIO RS version of MDSWRITEFIELD
2700       and add a WARNING if using globalFiles=T with multi-processors.
2701    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
2702      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
2703    o tracer advection scheme:
2704      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
2705       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
2706       was not very convenient).
2707      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
2708       (further tests needed for the implicit DST & Flux-Limiter schemes).
2709    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
2710      and sRef for convenience, handy, when you want to initialize
2711      ptracers in a large domain with a constant non-zero value. Also,
2712      untangle ptracers_init.F a little.
2713    
2714    checkpoint57v_post (2005/10/13)
2715    o change dome exp. to use variable viscosity in side-drag terms.
2716    o remove all the files from the cfc_offline test since they are now
2717      incorporated into tutorial_cfc_offline which has been producing
2718      identical results for a few days of testing
2719    o add new parameter: sideDragFactor to enable half-slip-side BC
2720      and change side-drag S/R to use viscosity from mom_calc_visc
2721      (can switch back by setting sideDragFactor=0.); affects results at
2722      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
2723       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
2724    o vorticity & strain are now computed without masking, to account for
2725      no-slip-side BC in variable viscosity calculation ; mask is applied
2726      anyway later on, before computing advection/coriolis terms.
2727    o modify exp4 to test new obcs support for reading from external files
2728      and for passive tracers
2729    o fix behavior of ptracers_monitor when monitor output is written to a
2730      netcdf-file; still not independent of monitor.F (writes in the same
2731      file).
2732    o change default value of tRef (put a uniform, meaningful value for ocean
2733      & atmos) and initialize sRef (was missing, as Martin mentioned).
2734    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
2735      to be proportional to enstrophy dissipation length.  Thus,
2736       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
2737      This is now consistent with Smagorinsky and with the manual.
2738    
2739    checkpoint57u_post
2740    o OBCS and PTRACERS: add open boundary support for passive tracers
2741      - either use homogenous (pseudo) v.Neumann conditions or prescribe
2742        OB-values from file; this is not different from the way theta and salinity
2743        are treated
2744      - however, Orlanski-radiation conditions are not supported, and the model
2745        will stop if you use pTracers and Orlanski at the same time.
2746      - beefed up the rountine obcs_external_fields_load: now only those open
2747        boundary values are overwritten with values from files for which there
2748        are really files, otherwise the OB-fields remain untouched. This makes
2749        it possible to use different OBs at different ends of the domain (as
2750        with EXF)
2751    o reduce number of exch calls in shap_filt (s2).
2752    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
2753      truncation level) 4/5 MLAdjust test results (11&12 digits match).
2754    
2755    checkpoint57t_post (2005/10/03)
2756    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
2757    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
2758      same truncation, independent of the face number: affects affects several
2759      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
2760    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
2761      note that biharmonic viscosity + no-slip was not tested in any experiment.
2762    o fix bug in non-linear free-surf side-drag ; generate new output for
2763      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
2764    o make mnc honor the writeBinaryPrec flag for most kinds of output
2765    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
2766    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
2767      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
2768    o add brackets in multi-terms sum to get same truncation, independent of
2769      the face number (manage to get exactly same value of gU,gV at the cs-edge)
2770      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
2771    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
2772      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
2773      a maximum grid-scale Reynolds number.  Also, changes all length calculations
2774      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
2775      Suggested values of viscosity parameters found in mom_calc_visc.
2776      Many new viscosity diagnostics available.
2777    
2778    checkpoint57s_post (2005/09/20)
2779    o Add clearing-house for viscosity calculations, mom_calc_visc and
2780      correct numerous bugs in LeithD and Smagorinsky discretizations.  
2781      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
2782      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
2783      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
2784      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
2785      The Strain-Tension form is now called with useStrainTensonVisc=.true.
2786      ViscAhStrain and viscAhTension are now retired.
2787    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
2788    o In response to JMC's bug report, genmake2 now ignores any soft-links
2789      that it finds in the *current* directory when searching for files.
2790      Soft-links found in any other source directories will still work as
2791      they did before.
2792    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
2793      a C routine to unlimit the stack size
2794    o mnc-ify pkg/aim snapshot vars
2795    o mnc-ify pkg/land as requested by Daniel
2796    o various changes to mnc including:
2797      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
2798      - output can now be grouped so that all files within a group
2799          change the ITER portion of their names in lock-step together
2800      - can now read ("global") PER-FACE (in addition to PER-TILE) files
2801          and works with both EXCH1 and EXCH2 (but needs more testing)
2802      - writing works for all verification test cases w/ g77 on Linux
2803    
2804    checkpoint57r_post (2005/09/07)
2805    o make MNC variable initialization happen earlier
2806    o add diagnostics for (almost) each term of the momentum Eq.
2807    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
2808    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
2809    o remove MINIMAL_TAVE_OUTPUT option ;
2810      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
2811    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
2812      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
2813    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
2814    o add time-dependent SST, SSS control
2815    o cost terms in ecco/ modularized (new cost_generic.F)
2816    o cost_averages routines are modularized (new cost_averagesgeneric.F)
2817    o new infrastructure for seaice model vs. obs misfits in seaice/
2818      * driver from the_main_loop.F is seaice_cost_driver.F
2819      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
2820      * gradient check in Exp. 6a of natl_box_adjoint/
2821    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
2822      (see README file)
2823    
2824    checkpoint57q_post (2005/08/19)
2825    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
2826    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
2827      - bug was reported by Jean-Michel and Ian Fenty
2828    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
2829      update exp. cpl_aim+ocn output.
2830    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
2831      Needed for high-res. runs with large global files
2832      to be able to limit tapelev size
2833    o Changed some tests for adjoint:
2834      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
2835      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
2836      * global_ocean.90x40x15/ back to default 3-level checkpointing
2837    o Modifications to enable scripted COMMON to MODULE conversion
2838      * verification/OpenAD/code/ has necessary scripts and description;
2839      * converts, compiles and runs successfully;
2840    
2841    checkpoint57p_post (2005/08/01)
2842    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
2843    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
2844      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
2845    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
2846    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
2847      (was already the case for dissipation with mom_vecinv,
2848       and also the case for grad.PhiHyd when staggered-timeStep)
2849      This will allow to put dissipation out-off the AB time-stepping.
2850     Unfortunately, affects truncation error. Update output of exp. that "fails"
2851      (cg2d matching number) and leave the others for later: front_relax(10),
2852      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
2853      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
2854    
2855    checkpoint57o_post (2005/07/30)
2856    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
2857      (2) its ready to be documented during the 20050801 DocFest
2858    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
2859      for ideal_2D_oce and lab_sea on linux_ia32_g77
2860    o set to #undef CTRL_SET_OLD_MAXCVARS_30
2861      in global1x1_tot/code_seaice_adj to access indices 32, 33
2862      (worth another tag)
2863    
2864    checkpoint57n_post (2005/07/29)
2865    o adding precip control xx_precip 32
2866    o adding swflux control xx_swflux 33
2867    o Replacing 10 forcing penalty cost routines by 1 generic.
2868    o Implementing partitioning in time-mean and variable adjustment
2869      for atmos. state.
2870    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
2871    o in natl_box_adjoint:
2872      * updated exp 1 to 10
2873        (but does not have time-mean vs. variable split results yet)
2874    o updated global1x1/*_seaice_adj/
2875      to incorporate latest changes
2876    o enable useSingleCpuIO for mdsio vector routines
2877      (applies in particular to tapelev I/O)
2878    o removed inefficient K-loop in all active_file*control*.F
2879    
2880    checkpoint57m_post (2005/07/28)
2881    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
2882      and advect_cs (use EXCH-2 and standard cs-32 grid files).
2883    o pkg/exch2: filling of face-corner halo regions is optional
2884      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
2885    
2886    checkpoint57l_post (2005/07/14)
2887     tag before updating tutorials (pre-release-2)
2888    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
2889       for output and interpolation of input fields onto model grid)
2890    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
2891       Affects results of exp. rotating_tank ; update output.txt.
2892    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
2893          and taking the square quantity and/or using a fraction-weight field.
2894    o fix aim_diagnostics_init.F mate numbers.
2895    o add mnc output capability to diagnostics/diagstat and update
2896      our cvsignore files for the ACSII output generated
2897    
2898    checkpoint57k_post (2005/07/02)
2899    o lab_sea now uses diagnostics package and provides a suite of
2900      new EXF diagnostics output.
2901    
2902    checkpoint57j_post (2005/06/30)
2903    o exf
2904      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
2905        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
2906        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
2907      * extended diagnostics output
2908        - now includes all EXF variables
2909        - hs, hl moved to common block
2910        - separate S/R for diagnostics, called after ctrl vector is added
2911        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
2912        - EXFqnet contains true Qnet (i.e. includes qsw)
2913      * updated verif. lab_sea, global_with_exf
2914      * Rearranging hflux (exf_mapfields -> exf_getforcing)
2915        to ensure that diagnostics sees a true EXFqnet
2916    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
2917    o diagnostics pkg: change pointers so that 1 diagnostic can be used
2918      several times with different frequencies.
2919    o mnc-ify the thsice package as requested by Daniel Enderton
2920      - the monitor--MNC output needs work
2921      - many attributes need to be added (most are currently blank)
2922    o mnc-ify theaim_v23 package as requested by Daniel Enderton
2923      - many attributes need to be added (most are currently blank)
2924    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
2925    o add Sadourny like discretization to the 4th.O vorticity advection scheme
2926    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
2927      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
2928         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
2929    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
2930     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
2931    
2932    checkpoint57i_post (2005/06/19)
2933    o Diagnostics package was changed: diagnostic allocation is now deactivated
2934      by setting an empty file name in the namelist (used to be by setting 0 frequency)
2935    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
2936      add 1rst Order upwind vertical Shear.
2937    o add a quick fix for A/B checkpointing in OFFLINE mode
2938    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
2939      end-run around the C/Fortran linking horror in eesup/src/timers.F
2940    o added pkg/runclock: allows user to terminate run based on wall clock
2941    o added non-hydrostatic scaling parameter: nh_am2
2942    o pkg/my82: futile attempt to make results compiler-independent by adding
2943      some "_d 0", etc. no effect.
2944    o for mnc output, fill the 'T' coordinate var with myTime and create a
2945      separate 'iter' variable for iteration count
2946    o pkg/diagnostics:
2947      add new capability: output of Global/Regional & per-level statistics ;
2948      tested against monitor output (including land & thSIce) on various exp.
2949    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
2950    
2951    checkpoint57h_done (2005/05/19)
2952      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
2953      data.diagnostics, data.gchem, data.ptracers) is done.
2954    
2955    o pkg/diagnostics: prepare for Global/Regional statistics.
2956      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
2957    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
2958      and rename it: DIFFERENT_MULTIPLE
2959    
2960    checkpoint57h_post (2005/05/14)
2961    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
2962    o pkg/diagnostics: change output frequency, now in seconds (instead
2963      of Nb of iterations). This requires to change data.diagnostics.
2964    checkpoint57h_pre (2005/05/12)
2965    
2966    o in mnc, let the user create the output dir if both mnc_outdir_date
2967      and mnc_outdir_num are false
2968    o add fflags() to pkg/diagnostics which allows one to specify, on a
2969      per-file basis, the file precision [default behavior is unchanged]
2970    o added diagnostics to pkg/kpp, including computation of mixed layer
2971      depth based on a temperature/density criterion
2972    o updated verification/natl_box to test the new pkg/kpp diagnostics
2973    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
2974    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
2975    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
2976      not mnc -- this mistake was found by JMC and is now corrected
2977    
2978    checkpoint57g_post (2005/04/15)
2979    o add Adams-Bashforth 3rd Order time stepping:
2980      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
2981      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
2982    checkpoint57g_pre (2005/04/15)
2983    
2984    o make lambda[Theta,Salt]ClimRelax spatially varying
2985      (default remains spatially uniform constant based on tau)
2986    o added new control variables
2987      * init. uVel, vVel, etanN
2988      * lambda[Theta,Salt]ClimRelax
2989    o separate masks used for ctrl_pack/unpack 'from write_grid' output
2990      (suggested by G. Forget)
2991    
2992    checkpoint57f_post (2005/04/06)
2993    o add parameter "baseTime" = model base time = time at iteration zero
2994      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
2995      account for baseTime shift
2996    o move Coriolis arrays from PARAMS.h to GRID.h
2997    checkpoint57f_pre (2005/04/06)
2998    
2999    o mnc-ifying the seaice package
3000    o introduced an alternative length scale calculation for use in the limiting
3001      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
3002    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
3003    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
3004      as well as grad(vort3).  Made it compatible with both approximate form
3005      for the cubed sphere and full form of these gradients.  Added flag
3006      useFullLeith to select between approximate and full form.  
3007    o add "d0" in getcon.F to reduce differences between compilers/platforms
3008      update output.txt of exp. fizhi-gridalt-hs
3009    o change port_rand funtion to allow to set the seed.
3010    o fix obscure MNC bug involving conversion between reals and integers
3011      - it caused no problems with certain (eg. gcc, ifc) compilers but the
3012        new version is now more standards-compliant
3013    o adjoint-related modifications
3014      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
3015      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
3016      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
3017    
3018    checkpoint57e_post (2005/02/28)
3019    o Adding eddy stress controls a la Ferreira et al.
3020    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
3021    
3022    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
3023      update output.txt of exp. fizhi-gridalt-hs
3024    o add more "Z" dimensions and associated coordinate vars to MNC
3025    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
3026    o parameter calendarDumps: when set, approximate months (30-31 days) and years
3027      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
3028      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
3029      months and years.  Requires pkg/cal.
3030    o diagnostics: add pickup functionality
3031      - off by default for backwards compatibility
3032      - current version only uses MDSIO -- MNC will be added
3033    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
3034    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
3035    
3036    checkpoint57d_post (2005/02/11)
3037    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
3038    o modify verification/ideal_2D_oce so that it tests the creation of mnc
3039      output from the diagnostics package
3040    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
3041    o make genmake2 more portable by using ".$FS" instead of ".f" for more
3042      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
3043    o add coordinate variables to the MNC output from the diagnostics package
3044    o change MNC-flags default value: true when useMNC=TRUE
3045    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
3046      the ability (off by default) to read the grid information using MNC
3047    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
3048    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
3049    o do snap-shot diagnostics at the middle of the time-interval (instead of
3050      at the end).
3051    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
3052      new test for AIM with thSIce + slab-ocean
3053    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
3054    o move state variable diagnostics to the beginning of the time step ;
3055      (note: still needs some work specially for snap-shot diagnostics)
3056      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
3057    
3058    checkpoint57c_post (2005/01/27)
3059    o Change testing option (-ieee) to get closer agreement between g77 & ifort
3060    o generate new output.txt files on faulks with g77 & the new -ieee option
3061    checkpoint57c_pre (2005/01/27)
3062    
3063    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
3064      update output.txt of exp. global_ocean.90x40x15
3065    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
3066      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
3067    o add saltFlux(+File) forcing capability with periodicExternalForcing
3068    o allow to use pkg diagnostics for GM-Redi & ThSIce output
3069    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
3070    o improvements for the MNC output from DIAGNOSTICS:
3071      - correct handling of the unlimitied dimension
3072      - all dims now have associated coordinate variables
3073      - variables located at U, V, and Corner ("Z") points are now written
3074        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
3075        *all* data points are output
3076    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
3077    o added pkg/seaice/seaice_monitor.F
3078    o mdsio_readfield.F can now read files visible only to master MPI process.
3079    o pkg/seaice: some test code for ice-modified ocean stress
3080    o exf_getffields interpolation defaults to bilinear for all scalar forcing
3081      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
3082      spurious negative numbers for precipitation and humidity.  Will cause
3083      some small numerical differences for integrations using pkg/exf/exf_interp.F.
3084    o pkg/ctrl/
3085      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
3086        May be enabled via doPackDiag
3087      *  introduce z-scaling of
3088         + gradient (doZscalePack) and
3089         + control (doZscaleUnpack)
3090    o pkg/mdsio/
3091      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
3092      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
3093    
3094    checkpoint57b_post (2004/12/20)
3095    o simplify options in diagnostics_fill arguments (remove weird combinations)
3096    o fix MNC coordinate variables so that they now contain per-face index
3097      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
3098      general, EXCH2 grids are only aligned to a "local" coordinate system
3099    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
3100    o Implement instantaneous output within pkg diagnostics:
3101      setting a negative frequency in data.diagnostics produces
3102     "snap-shot" output (as opposed to time-average if freq > 0)
3103    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
3104      NOTE: change ptracer diagnostics name: use 2 characters to work with
3105            more than 9 tracers. Add also diagnostics of advect & diffus flux.
3106    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
3107      becomes the coordinate variable for the 'T' dimension
3108    o add CF-style coordinate variables to MNC
3109      - just a first cut:  numbers are meaningless on the cubesphere and
3110        missing along the T axis but otherwise it works!
3111    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
3112    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
3113    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
3114      this is based directly on what the model compute, so that the content of
3115      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
3116    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
3117    o clean up build options files for SunOS, in particular
3118      - remove -traditional from xmakedepend
3119      - change -xarch=v9 to -xarch=native for f77
3120      - restore use of make (not gmake)
3121      - add CC=gcc if using g77
3122    o changes per discussion of AM, JMC, & EH3 today:
3123      - move redundant "grid" variables out of "state" -- in preparation of
3124        creating proper CF-style coordinate variables and in recognition
3125        that any/all grid variables can be easily copied (eg. w/NCO) from
3126        the grid files into any of the other NetCDF files
3127      - *always* output grid variables with MDSIO (this will eventually be
3128        changed)
3129      - output MNC grid file if useMNC is true
3130    o every instance of _END_MASTER() has been found and replaced with
3131      _END_MASTER( myThid ) in order to satisfy certain picky Sun
3132      preprocessors
3133    o re-arrange diagnostics pkg initialisation:
3134     - allow each package to extend the available diagnostics list
3135     - add some checking and fix small problems (multi-threaded, ...)
3136     - new S/R diagnostics_fill (replace fill_diagnostics):
3137       look through the short list of active diag. (instead of the long list)
3138       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
3139    
3140    checkpoint57a_post (2004/12/10)
3141    o this set of changes restores TAMC compatibility
3142      tested for global_ocean.90x40x15 adjoint on trough
3143      (what a pain)
3144    
3145    checkpoint57a_pre (2004/12/10)
3146    o some modifs in tools/build_options for sunos
3147    o call ctrl_pack for ctrl at end for optimcycle=0
3148    
3149    checkpoint57 (2004/12/09)
3150    o add horizontal bi-harmonic viscosity for vertical velocity
3151      - new parameter viscA4W (defaults to viscA4)
3152      - affects only non-hydrostatic code
3153      - to be done: no-slip lateral boundary conditions
3154    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
3155    o implement Implicit Vertical advection for pTracers
3156    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
3157      (implemented also for implicit vertical diffusion & advection)
3158    o OBCS: extend application of tracer open boundary conditions
3159      to a strip beyond the boundary of width Olx/Oly
3160    o add call monitor to TAF set of required calls (flow directives)
3161      and include in natl_box_adjoint
3162    o untangle a few ifdefs related to cost, ctrl, autodiff
3163      untangel a few ALLOW_ECCO_OPTIMIZATION
3164    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
3165      (theta2, salt2 in ecco_cost_weights)
3166    
3167    checkpoint56c_post (2004/12/03)
3168    o OBCS as control variables
3169      - update ctrl_ad_diff.list, obcs_ad_diff.list
3170      - remove balance of obcs controls from default
3171      - fix index bug nobcs in ctrl_init
3172      - fix dummy fields filen in ctrl_pack
3173      - add dummy weights for obcs
3174    o lsopt: comment out fort.94 output
3175    o optim:
3176      - remove unnecessary header files
3177      - adjusted namelists
3178      - add xerbla.F to Makefile
3179    o exf:
3180      - multiple modifications of exf_check_range
3181      - unit change in exf_init_runoff from [m/year] to [m/s]
3182    o mdsio:
3183      - i/o-vector change debugLevel from debLevA to debLevB
3184    
3185    checkpoint56b_post (2004/12/01)
3186    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
3187      is called from DO_THE_MODEL_IO
3188      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
3189      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
3190      - clean up PTRACERS_WRITE_TIMEAVE a little
3191    o add another verification experiment that tests both the cfc-pkg and
3192      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
3193      reactive tendencies treated inline with regular timestepping
3194    o testreport previously did a lousy job of comparing small numbers, so
3195      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
3196      implemented in the little c-progam tmp_cmpnum.c which is embedded in
3197      testreport.
3198    o ptracers_monitor: bug fix for MPI
3199    
3200    checkpoint56a_post (2004/11/28)
3201    o GCHEM: finish reorganizating the package
3202      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
3203        (introduces another 3D-array for each passive tracer, but only if
3204        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
3205        gchemTendency is not needed because the timestep is done separately)
3206      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
3207      - GCHEM is now---more or less cleanly---separate from PTRACERS
3208      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
3209        so clear to me how that should be done in a general way.
3210    o CFC: improve formatting of output in CFC_ATMOS
3211    o PTRACERS:
3212      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
3213        that ALL experiments with ptracers enable can be checked. This makes
3214        GCHEM_MONITOR obsolete.
3215      - include a runtime parameter PTRACERS_monitorFreq that defaults to
3216        monitorFreq
3217      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
3218    o add PTRACERS (PTR0[1-5]) to testreport output
3219    o exf_check_range:
3220      * default changed to .TRUE.
3221      * will check values for niter0 if debLevA, every timestep if debLevB
3222      * STOP in exf_check_range if 'out of range'
3223      * range chosen generous to allow for potential extema
3224      TBD: a version with stricter range
3225           permitted range would be runtime parameters
3226    o GMredi:
3227      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
3228      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
3229      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
3230    o GCHEM:
3231      - move call to GCHEM_FORCING_SEP, so that it is now called before
3232        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
3233      - introduced a useGCHEM runtime flag and applied it everywhere.
3234      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
3235        this flag is now only visible within GCHEM-pkg routines.
3236      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
3237        be replaced by a 3D array that is computed before thermodynamics; for
3238        this, the tracer ID iTracer had to be included into the parameter list
3239        of ptracers_forcing
3240      - set up forward_step to call gchem_forcing, that will replace
3241        gchem_forcing_int in ptracers_forcing
3242      - cleaning up
3243    o small cleaning of exch2: remove files that are also in eesupp/src
3244    
3245    checkpoint56 (2004/11/17)
3246    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
3247    o mnc: cleanup "full" files--fixes out-of-memory problem
3248    o ECCO-GODAE
3249      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
3250      * fully merged and updated from SIO code
3251        windstress sign change affects
3252        - exf_inscal_[u/v]stress
3253        - sign of xx_tau[u/v] adjustments
3254        - signs in cost_scat
3255      * ctrl_get_gen: avoid update of tau[u/v] for first few days
3256      * natl_box_adjoint updated and compressed
3257      * 2-level checkpoint switch added
3258        (tested in EXP. 1 of natl_box_adjoint)
3259      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
3260    o SVD
3261      * first complete, non-hacked version for SVD calculations
3262      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
3263        performed via direct access files admtlm_vector.it????
3264        (via ctrl_[un]pack)
3265      * optimcycle is used for ARPACK iteration counter
3266        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
3267      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
3268        and add linear transforms where necessary
3269      * controls are initial/final SST, SSS (can be extended; need to check
3270        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
3271    o mdsio: filename info to both stderr, stdout
3272    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
3273      from sign change
3274    
3275    checkpoint55j_post (2004/11/10)
3276    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
3277      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
3278    o add consistent build directories and .cvsignore files to verification
3279    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
3280    o make all subroutines 30 or less characters in length for certain older
3281      compilers to work (a thorough search only turns up two routines in
3282      pkg/ptracers)
3283    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
3284      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
3285    
3286    checkpoint55i_post (2004/10/28)
3287    o change arrays for total vertical diffusivity (2.D if explicit,
3288      3.D if implicit) ; each ptracer uses its own background value.
3289    o added mnc/NetCDF output capability to ocn_compon_interf
3290      - added bits to verification/cpl_aim+ocn so that it can run on
3291        ITRDA and other clusters without the mpirun "-wd" option
3292    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
3293      configuration
3294    o give MNC the ability to create additional files rather than
3295      exceeding a specified file size limit "MNC_MAX_FILESIZE"
3296      - the default is just less than 2GB which is a practical limit
3297        on many systems
3298    o Compute the non-local term using either KPP vertical diffusivity (=default)
3299       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
3300    
3301    checkpoint55h_post (2004/10/20)
3302    o add verification test "vermix"
3303    o remove all the *_ioinc flags and replace with the single global
3304      outputTypesInclusive flag
3305    o allow to set a vertical profile of vertical diffusivity for T & S
3306    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
3307    o useMNC moved from data.mnc to data.pkg
3308    
3309    checkpoint55g_post (2004/10/14)
3310    o Renaming carbon AD experiments to comply with testreport conventions
3311    o Updating adjoint of Held-Suarez hs94.1x64x5
3312    o Fixing directives for non-ECCO forward_step, after ECCO directives
3313      have been fixed to avoid recomp. of do_oceanic_phys
3314      Works well for global_ocean.90x40x15,
3315      but recomp. issue remains for carbon
3316    o Updating adjoint output for natl_box_adjoint after
3317      pkg/ecco has been modified (see taga c55d_post)
3318    
3319    checkpoint55f_post (2004/10/13)
3320    o rename to timeave_init_fixed
3321    
3322    checkpoint55e_post (2004/10/13)
3323    o some delicate re-shuffle of store directives to avoid one
3324      extra call of do_oceanic_physics
3325      affects ecco_the_main_loop.F, do_oceanic_physics.F
3326      checkpoint_lev1_directives.h
3327    o NB: this may break global_ocean adjoint temporarily,
3328      but it is clear how to fix it. Will do later, need this now.
3329    
3330    checkpoint55d_post (2004/10/11)
3331    o ECCO specific cost function terms (up-to-date with 1x1 runs)
3332    o ecco_cost_weights is modified to 1x1 runs
3333    o modifs to allow observations to be read in as
3334      single file or yearly files
3335    o enable to read exf forcing fields as either
3336      single file or yearly files (flag useExfYearlyFields)
3337    checkpoint55d_pre (2004/10/08)
3338    
3339    o switch between 2-level and 3-level checkpointing
3340    o add ability of MNC to write local and "partial" (eg. 2D slices where
3341      the full 3D field is never actually stored) arrays to NetCDF files
3342      with the correct (that is, the complete multi-dimensional) set of
3343      array indicies
3344      - used in mom_vecinv() to write the diagFreq output
3345      - tested (demonstrated) in verification/aim.5l_cs
3346    o further mnc-ification
3347      - add verification/lab_sea to the list with mnc setups
3348      - fix undefined mnc v-names in cd_code
3349      - add kpp to mnc output (both snapshot and timeave)
3350    o non-hydrostatic code
3351      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
3352        in calc_gw.F
3353      - defaults to viscAh
3354      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
3355        friction or Leith) in non-hydrostatic mode, as long as there is
3356        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
3357    o pkg/cost
3358      extend simple cost functions to treat time mean quantities
3359      (T,U,V) via cost_accumulate_state from cost_tile
3360    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
3361        be 2 times larger than the minimum size the advection scheme requires.
3362        now get a perfect conservation of salt in advect_cs test-exp (updated)
3363    o GGL90 (Gaspar's TKE mixed layer)
3364      - add horizontal diffusion of TKE, requires exchanges in
3365        do_fields_blocking_exchanges, horizontal diffusivity is zero by
3366        default. In OPA there is no horizontal diffusion of TKE but the
3367        mixing coefficients are computed from a horizontal average of TKE of
3368        6 points or so. I think that diffusion has a little more physical
3369        justification.
3370      - clean up ggl90_calc in the hope of reducing memory usage (this hope
3371        was in vain)
3372      - mask tke-variable in ggl90_init
3373    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
3374    o fix biharmonic diffusion on CS-grid.
3375    o more obcs stuff
3376      - added obcs_external_fields_load as an alternative to the EXF-pkg option
3377        for reading boundary values. This routine is called from
3378        obcs_prescribe_read
3379      - updated obcs_check
3380      - changed sponge layer relaxation parameter units for days to seconds
3381      - turned off sponge layer by default
3382      - changed argument list of OBCS_CALC to myTime+deltaTclock
3383      - fixed about 35 bugs in obcs_external_fields_load
3384    
3385    checkpoint55c_post (2004/09/23)
3386    o obcs stuff
3387      - new runtime flags useOBCSprescribe, useOBCSbalance
3388      - re-arranged obcs_calc
3389      - moved exf_getobcs to obcs_prescibe_read
3390        obcs_prescibe_read is called after ORLANSKI stuff
3391        and independent of it (executable can contain all).
3392      - updated obcs_check
3393      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
3394        These may be necessary only if tangential velocities are
3395        prescribed at OB, not sure, needs testing.
3396    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
3397      which simplifies the calls and passes the ifc check-bounds test
3398    
3399    checkpoint55b_post (2004/09/22)
3400    o add a 2D scalar, Z location, exchange_2 routine.
3401    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
3402      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
3403      affects advect_cs results (for the wrong reason): update output.txt
3404    o use a more standard discretization for biharmonic viscosity ;
3405     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
3406      affects results of dome set-up: update output.txt
3407    o fix gad_advection.F (CubedSphere part), back to version 1.23
3408    o fix bug in mom_vi_del2uv.F (CubedSphere part).
3409    
3410    checkpoint55a_post (2004/09/20)
3411    o merged code to
3412      * prescribe/read time-dependent open boundaries
3413        (works in conjunction with exf, cal)
3414      * sponge layer code for open boundaries
3415      * each boundary N/S/E/W now has its own CPP option
3416        (healthy for the adjoint)
3417    
3418    checkpoint55 (2004/09/17)
3419    o up-to-date adjoint of previous breaks
3420      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
3421      - global_ocean_ebm: adjoint still needs fix (TLM ok)
3422      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
3423      - carbon: * remove tr1-related adjoint verification
3424                * add ptracer as control variable
3425    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
3426      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
3427    
3428    checkpoint54f_post (2004/09/16)
3429    o in verification/carbin/ remove experiment related to
3430      ALLOW_PASSIVE_TRACER (array tr1 etc)
3431      code_ad/ input_ad/ results_ad
3432    
3433    o add two new packages
3434      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
3435        + subject to optimization (memory)
3436      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
3437        + subject to reordering (many GOTOs in the original code)
3438        + so far opps is called for every (i,j) point, and then operates in
3439          the vertical; one may want to reorder the scheme in order operate in
3440          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
3441          fields)
3442    o overhaul of IO so that we now have flags for MDSIO and/or MNC
3443      - all verification tests compile and run with linux_ia32_g77
3444      - defaults are compatible with current input files--nothing
3445        should change if you were not previously using MNC
3446      - MNC output has been added in numerous places (eg. timeave)
3447        but there are still a few writes not yet do-able with MNC
3448        (this is in progress)
3449      - flags now allow for either/or/both use of MDSIO and MNC and
3450        documentation will soon follow
3451      - numerous small formatting cleanups for ProTeX
3452    o add version info (via BUILD_INFO.h) to MNC and stdout
3453    
3454    checkpoint54e_post (2004/09/02)
3455    o add two new packages
3456      - pp81 (Packanowski and Philander, 1981), Richardson number and
3457        stratification dependent mixing
3458      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
3459      - these scheme operate in a similar manner as KPP (without ghat, of
3460        course), however there is only one diffusivity that is used for both
3461        temperature and salinity (and passive tracers)
3462    o add offline package
3463    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
3464      provided by Stephanie Dutkiewicz
3465    o genmake2: add ability to search for C compilers and cleanup test output
3466      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
3467    
3468    checkpoint54d_post (2004/07/27)
3469    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
3470    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
3471      leading to additional shift by 5 days each year of integration
3472       (i.e. leading to considerable offset over the years)
3473    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
3474    o start with no AB and no initial filtering (staggerTimeStep):
3475      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
3476    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
3477      (external loading & cpl import/export stay in forward_step.F)
3478    o update coupling interface to work with new staggerTimeStep
3479    o change MDSIO ptracers_pickup.
3480    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
3481    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
3482    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
3483    
3484    checkpoint54c_post (2004/07/18)
3485    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
3486      this affects (truncation error) output.txt of test-exp:
3487       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
3488    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
3489    o change Qnet to always be the net heat flux, (+upward).
3490      affects (truncation error) output of natl_box exp.: updated
3491    o define the max number of passive tracers in PTRACERS_SIZE.h
3492    o start to test mnc routinely in exp0
3493    o add sea-ice loading (sIceLoad) as a new forcing field.
3494    
3495    checkpoint54b_post (2004/07/08)
3496    o add testreport "-j JOBS" option for parallel builds (tested and pretty
3497       impressive on Altix and Opteron systems)
3498    o diagnostics can now write NetCDF files through the mnc package
3499    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
3500    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
3501    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
3502      affects (truncation error) output of lab_sea & natl_box exp.: updated
3503    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
3504    
3505    checkpoint54a_post (2004/07/06)
3506    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
3507    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
3508    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
3509    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
3510      + internal_wave (shift in writing cg2d_ini_res)
3511    checkpoint54a_pre (2004/07/05)
3512    
3513    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
3514      - modified verification/lab_sea and natl_box_adjoint accordingly
3515    
3516    checkpoint54 (2004/07/02)
3517    checkpoint53g_post (2004/07/02)
3518    o prepare splitting of thermodynamics: store convect.counter in common block
3519    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
3520      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
3521    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
3522    o new parameter "nShapS": allow to treat differently S from T (nShapT)
3523    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
3524    o restore adjointability
3525    
3526    checkpoint53f_post (2004/06/25)
3527    o modifications that affect AIM experiment results (update output.txt):
3528      - no advection of S at top interface Nr (pkg/generic_advdiff)
3529      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
3530    o AIM pkg:
3531      - include stability function into surf.Flux derivative relative to Tsurf
3532      - calculate clear-sky radiation & surface temp. change (for diagnostics)
3533    
3534    checkpoint53e_post
3535    o merged cylindrical coord configuration
3536    o added rotating_tank experiment
3537    checkpoint53e_pre
3538    
3539    checkpoint53d_post (2004/06/14)
3540    o faulks upgraded: re-generate output.txt that have changed:
3541       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
3542    o Added Bryan and Lewis, 1979, vertical diffusivity profile
3543    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
3544    o added Sadourny discretization of Coriolis
3545      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
3546      - re-enabled use of omega3 (useAbsVorticity)
3547    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
3548      vector-invariant equations
3549      - note: does *NOT* yet use same variable visc. for no-slip BC's.
3550    o recoded the lateral boundary conditions for non-hydrostatic w, this time
3551      hopefully without new bugs
3552      - still to do: biharmonic friction for non-hydrostatic w
3553    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
3554    o regenerated output for global_ocean_ebm (using -ieee)
3555    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
3556      of mom_common/
3557      - simple re-arrangement of instructions within computing loop
3558    checkpoint53d_pre (2004/05/21)
3559    
3560    checkpoint53c_post (2004/05/21)
3561    o new version of coupler for AIM+thSIce and Ocean models
3562     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
3563     - land: change Evaporation of snow
3564     - aim with thSIce: fix bug in snow-precip.
3565    o changes to calc_gw.F
3566     - bug fix for w^2 term near the bottom boundary
3567     - (hopefully) improve the lateral slip boundary condtions for use with
3568        partial/looped cells
3569      - because the bug fix changes two verification experiments anyway (exp5
3570        and plume on slope), change the lateral boundary condition from half slip
3571        to the value of no_slip_sides
3572    o ebm package wasnt quite up to the parallel task. Fixed that.
3573    o Adjoint of EBM package + verification
3574      * TLM OK
3575      * ADM not sufficient accuracy yet (needs further testing)
3576    
3577    checkpoint53b_post (2004/05/14)
3578    o Commiting new energy balance model to repository
3579      * package is pkg/ebm
3580      * verif. is verification/global_ocean_ebm
3581      * references are in ebm_driver.F
3582    C      * X. Wang, P. Stone and J. Marotzke, 1999:
3583    C        Global thermohaline circulation. Part I:
3584    C        Sensitivity to atmospheric moisture transport.
3585    C        J. Climate 12(1), 71-82
3586    C      * X. Wang, P. Stone and J. Marotzke, 1999:
3587    C        Global thermohaline circulation. Part II:
3588    C        Sensitivity with interactive transport.
3589    C        J. Climate 12(1), 83-91
3590    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
3591    C        Destabilization of the thermohaline circulation
3592    C        by atmospheric eddy transports.
3593    C        J. Climate 7(12), 1870-1882
3594    o Will need long integration testing.
3595    checkpoint53b_pre (2004/05/14)
3596    
3597    o created pkg/mom_common in preparation for variable viscosity code
3598    o renamed and split ini_mnc_io
3599    o pkg/land: only liquid water can diffuse or run-off
3600    o AIM using land: soil wetness availability account for snow
3601    o added printMapIncludesZeros to EEPARMS namelist
3602    
3603    checkpoint53a_post (2004/05/11)
3604    o restore TAMC compatiility for exf_constants.h
3605      (no usage of _d in .h)
3606    o Additional storing in KPP in an attempt to fix
3607      TAMC problem with adjoint of KPP code.
3608      (no success...)
3609      Identical code works fine with TAF.
3610    o Fixed verification/natl_box_adjoint experiments.
3611      Initial conditions for Experiments 4 and 5 are now
3612      set to "SEAICE_initialHEFF=0", which is more reasonable,
3613      and hence gives results closer to that of Experiment 2.
3614      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
3615    
3616    checkpoint53 (2004/05/06)
3617    o stable checkpoint with up to date adjoint
3618      TLM tests only run for 1st grdchk at the moment. Its unclear if
3619      this is a code problem or a problem with resetting code for g_
3620      variables that is being autogenerated wrong.
3621      Otherwise:
3622       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
3623       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
3624         are both still in chaos following their security messes.
3625    
3626    checkpoint52n_post (2004/05/06)
3627    o various build (mostly genmake2) changes including:
3628      - ability to build/run more easily within Cygwin and MacOS X
3629      - more complicated Makefiles with a stronger dependence on Gnu Make
3630    o pkg/seaice modifications
3631      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
3632        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
3633        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
3634      - changed proxy for geostrophic velocity and updated
3635        verification/lab_sea/results/* accordingly
3636      - removed ADI dynamic solver from pkg/seaice
3637      - replaced all occurrences of 1/CSTICE or 1/CSUICE
3638        they caused a segmentation fault under certain circumstances
3639      - removed unused field WATR
3640    o bug fix in exf-package:
3641      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
3642         now reflect that.
3643    o small fixes in the cal-package:
3644      - set reference date to first of January for the 'model'-calendar
3645      - failing of cal_CheckDate in cal_FullDate now actually results in a
3646        warning
3647    o small modifications in exf-package to increase flexibility:
3648      - change climtempfreeze from a constant to a runtime parameter that
3649        is specified in data.exf_clim (default = -1.9)
3650      - introduce runtime parameter windstressmax (default = 2.0) that is
3651        specified in data.exf
3652    o fix in pkg/thsice:
3653      - update Evap (Tsf changes) to be consistent with Latent heat flux
3654      - maintain snow precipitation unchanged (even if Tsf >=0).
3655     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
3656    
3657    checkpoint52m_post (2004/04/18)
3658    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
3659      this does not change any of the results, because myIter=0 in swfrac always
3660      lead to jwtype=2 (the default anyway), but the call makes little sense
3661      as a default
3662    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
3663    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
3664      atmospheric model (AIM) to use it ; add a "slab ocean" component.
3665    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
3666    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
3667    o extending useSingleCpuIO option to work with new exch2 I/O format
3668      - old-style, missing-tile I/O is still accessible by defining CPP
3669        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
3670    o monitor package can write to NetCDF files and/or STDOUT
3671    o fix re-definition bug in MNC_GRID_INIT_ALL()
3672    o doc/api_reference added
3673      - a framework for building an API Reference Manual using all
3674        the "protex" comments embedded in the code
3675      - see pkg/generic_advdiff, pkg/mnc for examples
3676    o MNC:
3677      - make myThid the last argument for all subroutines
3678      - new default for the grid files: NO halos
3679      - add useMNC and other run-time flags
3680      - separate per-file-group handling of the unlimited dimension
3681      - early initialization of MNC w/ flags read at the eeboot stage
3682        and lookup tables set in initialize_fixed
3683      - write all MNC output to a freshly-created directory
3684    o thermodynamics sea-ice (thsice) is now tested with testreport.
3685    o test exp. advect_cs: use the standard cs32 grid ; update output.
3686    o Added functionality to grdchk:
3687      pick global i,j,k position (or nearest wet) where to perform check.
3688    
3689    checkpoint52l_post (2004/03/11)
3690    o new land formulation:
3691      a) use ground enthalpy as prognostic variable to ensure exact
3692         energy conservation.
3693      b) account for water temperature and for latent heat of freezing
3694         in all processes (rain, run-off, ground storage)
3695      c) compute surface and ground temperature implicitly.
3696    o aim_v23 modification for new land model:
3697      a) Treat separately land / ocean / sea-ice surface fluxes
3698         to allow implicit computation of land & sea-ice surface temp.
3699      b) add snow precipitation.
3700    checkpoint52l_pre (2004/03/11)
3701    
3702    o fix problem (when 1 tile is empty) in min/max monitor.
3703    o fix bug in timeAve (u,vZetatave in common block)
3704    o no restoring terms under ice for pkg/seaice
3705    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
3706    o bug fix for pkg/seaice pickups
3707    o change MNC call locations and add coordinate attributes
3708    o mask vorticity at the corner ; affects global_ocean.cs output
3709    o fix ini_curvilinear_grid ; test CS experiments with mpi
3710    o aim.5l_cs: modify sea-ice fraction input file ; update output
3711    o exf: Adding simple range check routine for exf fields after read
3712    
3713    checkpoint52k_post (2004/02/23)
3714    o removed top-level directory "diags"
3715      - we migrated these functions to pkg/timeave a long time ago
3716    o fixed bug introduced in pkg/monitor
3717    o accuracy ctrlprec = 32 insuffient for gradient checks using
3718      averaged fields (I/O via cost_averages)
3719      -> use ctrl.h in active_file*.F to control I/O precision.
3720    o paramter list of CALL ADTHE_MAIN_LOOP
3721    o added initial do_the_model_io to ecco
3722    o set all ...Freq to zero after cost_final
3723      taveFreq, dumpFreq, pChkptFreq
3724    o MAIN and ECCO differentiability restored
3725    
3726    checkpoint52j_post (2004/02/18)
3727    o fix nchklev in tamc.h for global_ocean...
3728    o Bringing flow and store directives up-to-date
3729    o Really weird thing!
3730      call do_the_model_io from the_main_loop with parameters
3731      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
3732      TAF places a faulty re-call of initialise_varia
3733      after cost_final call which should not be there!
3734    checkpoint52j_pre (2004/02/03)
3735    
3736    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
3737      error messages
3738    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
3739    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
3740      debug output
3741    o modfied mdsio_writefield.F to handle non-global files under exch2
3742    o update AIM Cubed-Sphere exp (aim.5l_cs):
3743      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
3744    o update AIM Equatorial Channel exp:
3745      use standard aim_v23 pkg and change the SST fields to be more realistic.
3746    o globalFile now works with exch2
3747    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
3748      mon_vort3.F to make exch2 friendly with >1 tile per cube face
3749    o limit timeave output for hi-res integrations
3750    
3751    checkpoint52i_post (2004/01/21)
3752    o removed CPP_EEOPTIONS.h from verification/*/code
3753    o updated the tiling for global_ocean_pressure
3754    checkpoint52i_pre (2004/01/20)
3755    
3756    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
3757      the old pkg/aim).
3758    
3759    checkpoint52h_pre (2004/01/20)
3760    o shortened offending lines in exch2_send_rx?.template
3761    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
3762    o genmake2: add build & execute test for NetCDF code
3763    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
3764      old grid files, moved CPP_EEMACROS.h to pkg/exch2
3765    o added useSingleCPUIO flag to monitor.F and mon_out.F
3766    o added temporary hack for sea-ice dynamics on the cube:
3767      metric terms are ignored and it is assumed that
3768      there is no sea-ice on cube faces 1, 2, 4, and 5.
3769    
3770    checkpoint52f_post (2004/01/09)
3771    o added exch2 cube routines to pkg/exch2
3772    o modified hs94.cs-32x32x5 to use it
3773    o added new grid files to hs94.cs-32x32x5
3774    checkpoint52f_pre (2004/01/07)
3775    
3776    checkpoint52e_post (2004/01/07)
3777    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
3778      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
3779    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
3780      to work with implicit vertical advection and AB ;
3781    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
3782    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
3783     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
3784    checkpoint52e_pre (2004/01/02)
3785    
3786    o fix bug in impldiff when Nr=1 or Nr=2.
3787    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
3788    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
3789    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
3790      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
3791    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
3792    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
3793    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
3794    
3795    checkpoint52d_post (2003/12/16)
3796    o re-tiled many expts to allow comparison in multi-processor mode
3797      - updated output accordingly
3798      - changed hs94.128x64x5 to use intial T from file rather than use the
3799        random number generator
3800    o add infrastructure in model routines for fizhi and gridalt packages
3801    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
3802    o changes to permit hi-res, cubed-sphere, configuration
3803      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
3804      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
3805      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
3806        of surface winds for the cube
3807      (A verification experiment, based on global_ocean.cs32x15, but with
3808       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
3809       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
3810       complete with example surface forcing files and matlab scripts to look
3811       at the output and compare it with that of global_ocean.cs32x15.)
3812    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
3813       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
3814       to conform to the common rule.
3815    o check-in the first version of the coupler + interfaces for multi-components
3816       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
3817       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
3818       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
3819       - ocean and atmos. share the same horizontal grid (no interpolation).
3820       - exchanges between component and coupler is done in forward_step
3821    o new verification experiment, cpl_aim+ocn:
3822       coupled ocean - AIM atmosphere on cs32 grid.
3823    
3824    checkpoint52d_pre (2003/12/06)
3825    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
3826    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
3827    
3828    checkpoint52c_post (2003/11/25)
3829    o Fixing OPTIONS files for use of exf:
3830      - ALLOW_ECCO not needed
3831      - ECCO_CPPOPTIONS.h should not be included from
3832        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
3833        as has been the case in the past
3834      - All cal/exf related options are currently set in
3835        single header file. Should remain so until we
3836        agree on a consistent new policy.
3837    o Removed all CPP options for cal package.
3838      cal has no more CPP options.
3839    o modified STOREs in GAD_ADVECTION
3840    o corrected key comp. for passkey
3841    
3842    checkpoint52b_post (2003/11/23)
3843    o new version: "thsice" of thermodynamic sea-ice pkg:
3844     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
3845     - modify fluxes but do not change theta directly;
3846     - light cleaning of bulk_force pkg (still needed with thsice).
3847     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
3848       + output_thsice.txt to test thsice & bulk_force pkgs.
3849    o put back grid & coriolis monitor output.
3850    checkpoint52b_pre (2003/11/23)
3851    
3852    o call "do_the_model_io" at the beginning (=> dump initial state)
3853    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
3854    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
3855      (need info on NUMBER_OF_PTRACERS)
3856    o missing PTRACERS headers in some routines
3857    o default tamc.h in pkg/autodiff supposed to crash
3858      to ensure proper customization
3859    
3860    checkpoint52a_post (2003/11/17)
3861    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
3862      - moved surfaceTendencyTice from pkg/seaice to main code
3863      - subroutine FREEZE_SURFACE now limits only surface temperature
3864        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
3865        => new output.txt for global_ocean.cs32x15 & global_with_exf
3866      - keep the old version of FREEZE for backward compatibility;
3867        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
3868      - corresponding modifs for TAF directives
3869    o added surface flux output variables to TIMEAVE_STATVARS
3870    o time-averaged output for pkg/ptracers
3871    o fix problem with ECCO-related divided adjoint
3872      snapshot file was missing some ad-variables,
3873      but no warning issued by TAF
3874    
3875    checkpoint52a_pre (2003/11/12)
3876    o some bug fixes for #undef REAL4_IS_SLOW
3877    
3878    checkpoint52 = ecco_c52_e35
3879    o after testing adjoints of checkpoint51u_post
3880    
3881    checkpoint51u_post (2003/11/06)
3882    o this is the post-merge tag of the ecco-branch
3883      (needs another clean checkout and re-testing)
3884    o various natl_box_adjoint configs and results
3885      but no input fields
3886    o obcs adjoint not yet merged!
3887    o adding ECCO global 1x1 and 2x2 degree configs
3888    o updated/extended some store directives for seaice
3889    o pkg/ecco now containes ecco-specific part of cost function
3890    o top level routines the_main_loop, forward_step
3891      supersede those in model/src/
3892      previous input data.cost now in data.ecco
3893      (new namelist ecco_cost_nml)
3894    o in ctrl/ cleaned some cross-dependencies and updated CPP options
3895    
3896    checkpoint51t_post (2003/11/04)
3897    o this is the pre-merge tag of the ecco-branch
3898    
3899    checkpoint51s_post (2003/11/04)
3900    o cleanup: removed various obsolete #define-s
3901    o pkg/grdchk
3902      - renamed 'ph-grd 3' to 'grad-res'
3903      - merged from ecco-branch
3904        (remaining bug fixes for obcs gradient checks)
3905      - additional high-precision output for testreport
3906        (grep for 'precision_grdchk_result')
3907    
3908    checkpoint51r_post (2003/11/03)
3909    o cleaned up or removed CPP_OPTIONS.h files
3910    o updated results for some of the tests to reflect the new
3911      optfiles (-ieee: -O0 instead of -O3)
3912    
3913    checkpoint51q_post (2003/10/30)
3914    o cd_code:
3915      - moved cd_scheme.F -> cd_code_scheme.F
3916      - separate read_checkpoint from cd_code_ini_vars.F
3917      - separated cd_code part from write_checkpoint
3918      - updated AD_SOURCE, generated .flow
3919      - added CD_CODE_VARS.h to the_main_loop
3920      - Moving cd_code specific store dir.s to pkg/cd_code
3921    o ctrl package totally restructured
3922      - pack/unpack now optional and decoupled from
3923        xx_/adxx_ I/O
3924      - ctrl_pack/unpack cleaned
3925        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
3926      - confined inclusion of AD_CONFIG.h to where necessary.
3927    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
3928    
3929    checkpoint51p_post (2003/10/30)
3930    o create initial cd_code package
3931      - WARNING: the initialization of fields within packages
3932        is broken because INI_FIELDS (where READ_CHECKPOINT is
3933        called) is called *before* PACKAGES_INIT_VARIABLES.
3934        This seems to be backwards since
3935        1) its important to initially zero the entire field including
3936           the "halo" region
3937        2) zeroing needs to be done *before* reading pickup info
3938           and the pickup call might or might not happen in any
3939           particular run
3940      - this needs an overhaul for R2
3941    o cleanup verification/*/code/GMREDI_OPTIONS.h
3942    o cleanup testreport
3943    
3944    checkpoint51o_post (2003/10/27)
3945    o bringing AD-related verif's up to date with genmake2
3946      - carbon/
3947      - global_ocean.90x40x15/
3948      - hs.94.1x64x5/
3949      - (front_relax/ )
3950    o (more) consistent directory structure for AD-related verif.'s
3951    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
3952    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
3953    o bug fix in find_alpha.F for MDJWF:
3954      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
3955        change rho -> rho-rhoConst
3956      - replace call find_rho to find_rhonum
3957    o initialisation of rFlx extended to full array (required by TAF)
3958      and shifted to thermodynamics
3959    o removed PTRACERS.h in ptracers routine
3960    o added surfacetendencyPtr to S/R parameter list pracers_forcing
3961    o Correcting initialisations for fVerU, fVerV.
3962    o helping TAF to recognize dependency on kUp for
3963      fVerU, fVerV
3964    o Replacing delZ by delR in pkg/ctrl/
3965    checkpoint51o_pre (2003/10/24)
3966    
3967    o undid all of cp51 pending some cleanups and discussion
3968    o added the [#include "AD_CONFIG.h"] statement to all files that need
3969       it for adjoint/tl #defines
3970     o re-worked the build logic in genmake2 to support AD_CONFIG.h
3971     o removed tools/genmake since it no longer works
3972    
3973    checkpoint51n_post (2003/10/23)
3974    o modifications to make FREEZE flux visible to pkg/kpp
3975      - moved surfaceTendencyTice from pkg/seaice to main code
3976      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
3977      - subroutine FREEZE now limits only surface temperature
3978        (this means new output.txt for global_ocean.90x40x15,
3979         global_ocean.cs32x15, and global_with_exf)
3980    o added surface flux output variables to TIMEAVE_STATVARS
3981    
3982    checkpoint51n_pre (2003/10/23)
3983    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
3984    o added [#include "AD_CONFIG.h"] to all files that use the following
3985      defines:
3986      - ALLOW_ADJOINT_RUN
3987      - ALLOW_TANGENTLINEAR_RUN
3988      - ALLOW_ECCO_OPTIMIZATION
3989    
3990    checkpoint51m_post (2003/10/21)
3991    o incorporating changes to get TAMC/TAF working in genmake2
3992      - added new TAMC/TAF targets to the Makefile
3993      - various cleanups related to package handling
3994      - these changes should have no impact on the forward model
3995    
3996    checkpoint51l_post (2003/10/20)
3997    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
3998     - faster algorithm for cal_addtime.F
3999     - higher precision arithmetic, where needed
4000     - pkg/exf *startdate variables changed from calendar date to
4001       model integration time
4002    
4003    checkpoint51l_pre (2003/10/17)
4004    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
4005    o enable to apply restoring on S & T only in a latitude band.
4006    o update output (external_forcing_surf modif. change truncation errors)
4007       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
4008    
4009    checkpoint51k_post (2003/10/16)
4010    o change default to: useNHMTerms=.FALSE.
4011     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
4012       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
4013     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
4014        exp1, ideal_2D_oce
4015     - change data file of oceanic exp (leave the results unchanged for now)
4016       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
4017    o set gravitySign automatically according to the vertical coordinate used
4018      (and change sign: back to "logical" value: +1 when R increases downward)
4019    o added an include barrier to the default CPP_OPTIONS.h and
4020      removed the #include "PACKAGES_CONFIG.h" from it
4021    o fix a bug in mom_fluxform (from chk51j_post)
4022    
4023    checkpoint51j_post (2003/10/10)
4024    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
4025    o adjusted some flow directives (dynamics, thermodynamics)
4026    o added cubed-sphere case to test cost function
4027    o heckpoint_lev?_directives.h now include
4028      pkg-specific directives, whenever those are enabled.
4029    o Moving pkg-specific flow directives to corresponding pkg
4030      Moving pkg-specific differentiation list to corresponding pkg
4031      Moving pkg-specific checkpoint-lev storing to corresponding pkg
4032      ---> conventions are
4033           - pkg_ad.flow
4034           - pkg_ad_diff.list
4035           - pkg_ad_check_lev?_dir.h
4036    
4037    checkpoint51i_post (2003/10/09)
4038    o merge of the branch-genmake2
4039      - knowingly breaks the older genmake
4040      - automatic generation of all ALLOW_${PKG_NAME} defines
4041      - new testreport supersedes older testscript
4042    o large number of package inclusion and header cleanups
4043    checkpoint51i_pre (2003/10/08)
4044    
4045    o new output for adjoin of global ocean vector invariant
4046    o fix for checkpoint of thermodynamic seaice and bulk_force
4047    o Steph gchem various cleanups
4048    
4049    checkpoint 51h_pre
4050    o fixed some single quotes
4051    o modify gchem pkg to be more versatile
4052    o modifications to clean up dic pkg
4053    o add pkg/cfc
4054    
4055    checkpoint51g_post (2003/10/02)
4056    o provide links for ARPACK and ADM*TLM
4057    o start removing verification/vero/
4058    o update AD-related stuff
4059      (in particular some IF-statements in model/src/ routines)
4060    o adding to verification/global_ocean.90x40x15/ adjoint of
4061      vector invariant setup
4062    
4063    checkpoint51f_post (2003/10/02)
4064    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
4065    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
4066      of tracer Green's fucntions for ocean inversion project.
4067    
4068    checkpoint51f_pre (2003/08/07)
4069    o Added on-the-fly spatial interpolation capability
4070        "USE_EXF_INTERPOLATION" to pkg/exf.
4071      - This is a temporary Cartesian-grid hack until
4072        the super-duper ESMF coupler becomes available.
4073      - See verification/global_with_exf/README for usage example.
4074      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
4075        flags and modified pkg/seaice accordingly.
4076    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
4077        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
4078        non-local transport term.
4079    
4080    checkpoint51e_post (2003/08/03)
4081    o pkg/mom_vecinv:
4082      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
4083      - add time-ave diagnostic of vorticity advection.
4084    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
4085    o atmospheric geopotential: - include water vapor effect;
4086                                - use p^kappa in p* scaling.
4087    o land pkg: read initial state from files.
4088    o AIM : add stratospheric drag in the upper level
4089    
4090    checkpoint51d_post (2003/07/18)
4091    o change function ILNBLNK (=> last non-blank char.) to return zero
4092      (instead of the string length) when the string. char is empty
4093    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
4094    o modif's to restore TAMC compatibility
4095      - avoid "_d" constructs in PARAMETER declarations
4096      - avoid interrupting lines by comment lines
4097    o Use cluster local disks for purely local I/O
4098      vs. globally visible disks needed for ctrl stuff
4099      (merged from ecco-branch)
4100      - new active_file_loc... and mdsio_..._loc routines
4101      - affected packages: autodiff, ctrl, grdchk, mdsio
4102    
4103    checkpoint51c_post (2003/07/08)
4104    o introducing integer flag debugLevel
4105      - debLevZero: suppress all output
4106      - debLevA: standard
4107      - debLevB: equivalent to current debugMode=.TRUE.
4108    o introducing pathname variable mdsioLocalDir for mdsio
4109      that can be specified at runtime
4110      (relevant for cluster I/O to local disk)
4111    `
4112    >>>checkpoint51b_post
4113    adjoint of ptracers
4114    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
4115    o extended state in checkpoint_lev?, etc.
4116    o alternative ctrl/cost with tr1 or ptracer
4117    o new comlev1_bibj_ptracers
4118    o new ptracers.flow
4119    o made ptracers_forcing same as external_forcing_s
4120    o added verification for adjoint with ptracers
4121      - adm. grdchk fail so far
4122      - tlm. grdchk OK
4123      - checked tapelev/comlev recomputations: OK
4124    <<<checkpoint51b_pre
4125    
4126    checkpoint51a_post (2003/06/25)
4127    o added code for biogeochemistry package
4128      - new pkgs: dic, gchem
4129      - new subroutine in ptracers
4130    o modify code for biogeo packages
4131      - in model/src and pkg/ptracers
4132    
4133    checkpoint51 (2003/06/24)
4134    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
4135      - autodiff, ctrl, exf, grdchk, seaice
4136      kept separate packages
4137      - cost, ecco, obcs
4138    o updating verification/internal_wave, verification/lab_sea
4139      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
4140    
4141    checkpoint50i_post (2003/06/23)
4142    o Preparing next differentiable checkpoint and sync
4143      of MAIN vs. ecco-branch
4144      - 1st step: this one is differentiable
4145      - 2nd step: next(! not this) checkpoint will have updated packages
4146                  from ecco-branch)
4147    
4148    checkpoint50h_post (2003/06/20)
4149    o new package "land": provide surface BC for AIM.
4150    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
4151    o AIM: use true log-P extrapolation for near surface temp (= as in
4152        F.Molteni paper) ; update aim.5l_cs output.
4153    o New variable in PARM03 for more flexible pickups
4154    o somewhat cleaned package initialisation sequence for
4155      ctrl/ cost/ ecco/ in packages_... routines
4156    
4157    checkpoint50g_post (2003/05/23)
4158    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
4159      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
4160      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
4161        made the default because of faster convergence than ADI
4162    
4163    checkpoint50f_post (2003/05/23)
4164    o exf totally restructured
4165      - replaced all exf_set_ routines by one generic exf_set_gen.F
4166        and made sure it's still differentiable
4167      - split exf_getffields.F into new exf_bulkformulae.F
4168      - exf_inscal_/exf_outscal_ suffixes consistent with field names
4169      - updated adjoint/makefile and relevant verif. accordingly
4170    
4171    checkpoint50f_pre (2003/05/23)
4172     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
4173          + change Evap over land. (update aim.5l_cs output)
4174     o added missing .cvsignores and made uniform across expts
4175     o changed configuration of tidal_basin_2d expt
4176     o added pkg/debug functions for tracing code in fatal crashes
4177     o tidied pkg/monitor to use MONITOR_OPTIONS.h
4178     o new fn in pkg/monitor to stop model if solution grows too big
4179     o removed lots of single quotes from comments
4180    
4181    checkpoint50e_post (2003/05/14)
4182    o make KPP work with PTRACERS
4183     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
4184       nearly a copy of kpp_transport_s
4185     - there is no analogue to SurfaceTendencyS, so I have to use
4186       gPtr(of the surface layer) instead
4187    o add a new platform SunFire+mpi (SunFire 15000) to genmake
4188    checkpoint50e_pre (2003/05/13)
4189    
4190    checkpoint50d_post (2003/05/13)
4191    o change kpp output from multiple-record state files to single-record state
4192      files analogous to write_state.F
4193    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
4194      analogous to the cg2d-related output.
4195    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
4196      so that writing to internal file fn (with length 512) fails.
4197    checkpoint50d_pre (2003/05/12)
4198    
4199    checkpoint50c_post (2003/05/12)
4200    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
4201    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
4202    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
4203    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
4204    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
4205    
4206    checkpoint50c_pre (2003/04/30)
4207    Merging from release1_p13:
4208    o bug fix for pkg/seaice dynamic solver
4209    o Added SEAICE_initialHEFF to pkg/seaice
4210    
4211    checkpoint50b_post (2003/04/17)
4212    o store u*,v* in gU,V instead of in guNm1,gvNm1
4213    o in order to put the momForcing out of the Adams-Bashforth:
4214      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
4215      to timestep.F
4216    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
4217    o re-generate output for highly sensitive test-exp:
4218       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
4219    
4220    checkpoint50b_pre (2003/04/17)
4221    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
4222    o corrected CPP option mismatch in exf_Bulk... functions for case
4223      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
4224    
4225    checkpoint50a_post (2003/03/21)
4226    o Bug fix for merging between c50 and KPP.
4227      ikey was passed from thermodynamics to kpp_calc via
4228      common block rather than being recomputed in kpp_calc,
4229      in contradiction with new key itdkey.
4230      New key ikppkey created, and tamc.h headers updated.
4231    
4232    checkpoint50 (2003/03/08)
4233    - 2nd step of merge with ecco-branch:
4234      merge changes in ecco-branch back into main trunk
4235    - bug fix in find_alpha
4236    - more storing in gmredi_calc_tensor.F, kpp_routines.F
4237    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
4238    - merged some sliced AD support routines
4239    
4240    checkpoint49 (2003/03/06)
4241    merged from ecco-branch:
4242    o exf:
4243      - Enable initialisation of forcing fields to constant
4244        (runtime) values.
4245      - in exf_getffields.F
4246        Reduce i-/j-loop to interior domain, discarding overlaps.
4247        That also fixes wrong TAF-key computations for key_1, key_2
4248        with bulf formulae.
4249      - exf_init.F modify #ifdef for exf_init_evap
4250      - exf_getffieldrec.F, ctrl_getrec.F
4251        The following INT-usages are not safe:
4252          fldsecs  = int(fldsecs/fldperiod)*fldperiod
4253          fldcount = int(fldsecs/fldperiod) + 1
4254        and were modified.
4255    o autodiff: checkpoint_lev...
4256      - updated storing for bulk formulae (some arrays were missing)
4257      - added state for seaice package
4258      - synchronized with main branch
4259    o DIVA:
4260      Modif.s in
4261      - the_main_loop.F
4262      - the_model_main.F
4263      and added cost_final_restore.F cost_final_store.F
4264      o With these changes, it is possible to fully separate
4265        the first forward run to compute the cost function (mdthe_main_loop)
4266        and adjoint runs over individual DIVA intervals (adthe_main_loop)
4267        into separate model executions.
4268        This enables better tuning of DIVA to given queue sizes.
4269      o Loss of cost function value in consecutive DIVA runs is
4270        fixed by storing to 'costfinal' file.
4271      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
4272        beginning/end of adjoint integration is accounted for.
4273      The current changes apply to TAF-1.4.26.
4274      TAF has one remaining bug, requiring one manual change
4275      (see MITgcm manual).
4276    o cal: synchronized between MAIN and ecco-branch
4277    
4278    checkpoint48i_post (2003/03/05)
4279    o Changes to restore differentiability of code w.r.t. previous tag
4280      (mostly adding new routines to make list and replacing
4281      pressure by totPhiHyd).
4282    o Updated and merged grdchk package
4283      - has both ADM and TLM checks
4284      - works for single- and multi-proc.
4285      - output cleaned
4286      - worked successfully for parallel DIVA
4287    o genmake:
4288      - Adding -platform=SP4
4289      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
4290    o Modif. for DIVA:
4291      ctrl_unpack should not be called in intermediate DIVA interval.
4292      (similar thing would apply for active files such as
4293      tbar, sbar, psbar, which should not be reinitialised;
4294      only relevant for ecco-branch)
4295    
4296    checkpoint48h_post (2003/02/28)
4297    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
4298    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
4299    o Added SEAICE_initialHEFF to pkg/seaice
4300    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
4301    
4302    checkpoint48g_post (2003/02/18)
4303    --- EOS:
4304    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
4305      store total Potential in totPhyHyd for diagnostics & EOS.
4306    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
4307    --- Pressure/geopotential gradient:
4308    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
4309    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
4310      ( changes results of global_ocean_pressure )
4311    o NLFS + z-coord.: add eta*Rho' contribution.
4312    o accurate phiHyd when using interface-W at the middle between 2 centers
4313     ( changes results of ideal_2D_oce )
4314    o includes r* 2nd term in potential gradient.
4315    
4316    checkpoint48f_post (2003/02/18)
4317    Merging from release1_p12:
4318    o Modifications for using pkg/exf with pkg/seaice
4319      - improved description of the various forcing configurations
4320      - added basic radiation bulk formulae to pkg/exf
4321      - units/sign fix for evap computation in exf_getffields.F
4322      - updated verification/global_with_exf/results/output.txt
4323    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
4324      (SBO) core products, including oceanic mass, center-of-mass,
4325      angular, and bottom pressure (see pkg/sbo/README.sbo).
4326    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
4327      to avoid negative values in shallow regions.
4328      - updated verification/natl_box/results/output.txt
4329      - updated verification/lab_sea/results/output.txt
4330    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
4331    o Added useSingleCpuIO option (see PARAMS.h).
4332    o Updated useSingleCpuIO option in mdsio_writefield.F to
4333      work with multi-field files, e.g., for single-file pickup.
4334    o pkg/seaice:
4335      - bug fix in growth.F: QNET for no shortwave case
4336      - added HeffFile for specifying initial sea-ice thickness
4337      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
4338    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
4339      kpp_transport_t.F, forward_step.F, and the_main_loop.F
4340    o pkg/seaice:
4341      - adjoint-friendly modifications
4342      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
4343    
4344    checkpoint48e_post (2003/02/12)
4345    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
4346    o dynamics: change definition of computational domain & adapt mom_fluxform
4347      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
4348    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
4349        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
4350        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
4351        global_ocean.90x40x15 global_with_exf global_ocean_pressure
4352        inverted_barometer solid-body.cs-32x32x1
4353      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
4354    
4355    checkpoint48d_post (2003/02/09)
4356    o in preparation for r*:
4357     a) use pre-computed gradient of hydrostatic potential:
4358        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
4359     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
4360        => affects results of glob_oce_pressure (different truncation error)  
4361      update output.txt of ideal_2D_oce & global_ocean_pressure
4362    
4363    checkpoint48d_pre (2003/02/08)
4364    o in preparation for r*:
4365      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
4366      pass the 2 comp. of the grad. as arguments to momentum S/R.
4367      but for the moment, only used if it does not change the results.
4368    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
4369    
4370    checkpoint48c_post (2003/02/06)
4371    Modifications in treatment of initial flux forcing controls
4372    to avoid extra storing of flux fields.
4373    
4374    checkpoint48c_pre (2003/01/21)
4375    o Added tidal_basin_2d experiment (currently 1D!)
4376    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
4377    
4378    checkpoint48b_post (2003/01/27)
4379    o r* coordinate added in #ifdef NONLIN_FRSURF block.
4380     (modification to pressure gradient not yet implemented)
4381    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
4382      (for U & V) that are used for vertical advection of momentum.
4383    
4384    checkpoint48a_post (2003/01/24)
4385    o In preparation for r*, use temp. array to compute vertical transport
4386       in flux-form momentum pkg. => change results of few test-exp.
4387      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
4388                        lab_sea, natl_box & plume_on_slope
4389    
4390    checkpoint48 (2003/01/23)
4391    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
4392    
4393    checkpoint47j_post (2003/01/21)
4394    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
4395    o moved adexch from forward_step to addummy_in_stepping
4396    o added exch in ctrl_map_...
4397    o aveFreq.=0. at end of cost_final to avoid overwrite in
4398      reverse checkpointing loop
4399    o Yet more changes in gmredi:
4400      * adgmredi_calc_tensor
4401        avoiding all recomputation of gmredi_slope_limit
4402      * adgmredi_x/y/rtransport
4403        added flag for excessive storing to avoid recomp. of
4404        u/v/rtans, dTdx/y/z
4405        -> this is not really necessary and very memory-consuming
4406      * adgmredi_slope_psi:
4407        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
4408      * gmredi_slope_limit
4409        re-activated full calculation of taperfct for case 'ac02'
4410    o updating verification/ adjoints of carbon, global_ocean.90x40x15
4411    
4412    checkpoint47i_post (2003/01/13)
4413    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
4414    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
4415      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
4416    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
4417    o gmredi: fix few bugs.
4418    
4419    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
4420    This will be a good checkpoint to plug into the ecco-branch.
4421    o few modif.'s to get latest version adjointed
4422      (mainly kick out code in ini_linear_phisurf)
4423    o modif's to run adjoint with exactConserv
4424    o case GM_BOLUS_ADVEC should be cleaned
4425      S/R gmredi_slope_psi should be cleaned
4426    o verification/carbon now has exactConserv=.TRUE.
4427    
4428    checkpoint47g_post (2003/01/10)
4429    o time-average AIM output: becomes independent from statvars time-average
4430      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
4431    o After TAF bug fix:
4432      Tested adjoint of gmredi package.
4433      Tests were done with checkpoint47 rather than with latest
4434      checkpoint47f_post since the latter is broken for the adjoint
4435      verification/carbon/ contains both ADM and TLM gradient checks.
4436    Here they are, before they get changed/lost/stolen.
4437    Mostly modif.'s to fix numerical sensitivities.
4438    Gradient checks OK for
4439    - GM_taper_scheme:
4440      * clipping
4441      * ac02
4442      * linear
4443      * glw91
4444      * dm95
4445      * ldd97
4446    - GMREDI_OPTIONS:
4447      * GM_VISBECK_VARIABLE_K
4448      * GM_NON_UNITY_DIAGONAL
4449      * GM_EXTRA_DIAGONAL
4450      * GM_BOLUS_ADVEC
4451    in conjunction with data.gmredi parameters to be checked in
4452    in a few minutes under verification/carbon/code/
4453    
4454    checkpoint47f_post (2002/12/28)
4455    Merging from release1_p10:
4456    o modifications for using pkg/exf with pkg/seaice
4457      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
4458        and SEAICE_EXTERNAL_FLUXES
4459      - pkg/exf CPP options EXF_READ_EVAP and
4460        EXF_NO_BULK_COMPUTATIONS
4461      - usage examples are Experiments 8 and 9 in
4462        verification/lab_sea/README
4463      - verification/lab_sea default experiment now uses
4464        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
4465    
4466    checkpoint47e_post (2002/12/27)
4467    o created a tag prior to creating a branch
4468    
4469    checkpoint47d_post (2002/12/16)
4470    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
4471      at the bottom boundary had an erroneous half slip boundary condition
4472    o added bottom drag and no slip boundary condition capabilities to
4473      oceanic pressure coordinates code
4474    o added new verification experiment global_ocean_pressure, this experiment is
4475      also described in the tutorial section of the manual
4476    checkpoint47d_pre (2002/12/16)
4477    
4478    checkpoint47c_post (2002/12/16)
4479    o Added a verification experiment for a global cubed-sphere ocean run
4480      -  verification/global_ocean.cubed32x32x30
4481      -  uses pkg/therm_seaice and pkg/bulk_forcing
4482    
4483    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
4484    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
4485      when using P-coordinate; only implemented for atmospheric config.
4486    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
4487      NOTES: requires option NONLIN_FRSURF to be "#define".
4488    o update advect_xz/results/output.txt (left from checkpoint44g_post)
4489    
4490    checkpoint47b_post (2002/12/05)
4491    Merging from release1_p9:
4492    o pkg/seaice
4493      - removed GOTO's and added taf directives
4494      - double precision constants to reduce the g77 (Linux)
4495        to F77 (SGI) differences reported in release1_p8
4496    o tools/genmake
4497      - added SGI options
4498    o verification/testscript
4499      - updated to that of checkpoint47a_post
4500    o verification/global_ocean.90x40x15/input/eedata
4501      - modified for SGI f77 compatibility
4502    o verification/lab_sea
4503      - added description of sea-ice model
4504      - added missing matlab routines
4505      - added test of thermodynamics parallelization
4506    
4507    checkpoint47a_post (2002/11/23)
4508    o new pkg: aim_v23
4509     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
4510       for now, keep the same surface forcing as before.
4511     - Part-Cell implemented into AIM; check that Heat & Water are conserved
4512     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
4513     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
4514    o add diagnostic of surface correction term in monitor output
4515    
4516    o bulk_force and therm_seaice
4517    - Two packages:  bulk_force (Bulk forcing)
4518      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
4519    - Earlier integration from Stephaine Dutkiewicz
4520      and Patrick Heimbach.
4521    - Two ifdef statements for compile time,
4522       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
4523    
4524    checkpoint47 (2002/11/15)
4525    differentiable version of checkpoint46n_post
4526    o bug fix in quasihydrostaticterms
4527    o * "clean" adjoint code (in terms of extensive recomputations)
4528        can now be obtained for all GMREDI options (i.e. for
4529        - GM_VISBECK_VARIABLE_K
4530        - GM_NON_UNITY_DIAGONAL
4531        - GM_EXTRA_DIAGONAL
4532        - GM_BOLUS_ADVEC )
4533      * However, wrong gradient check problem remains unsolved.
4534      * New CPP options have been introduced for different
4535        tapering schemes
4536    o external_fields_load now part of differentiation list
4537    o pressure needs multiple storing;
4538      would be nice to have store_pressure at beginning or
4539      end of forward_step, e.g. by having phiHyd global (5-dim.)
4540      (NB: pressure is needed for certain cases in find_rho,
4541      which is also invoked through convective_adjustment).
4542    o recomputations in find_rho for cases
4543     'JMD95'/'UNESCO' or 'MDJWF' are OK.
4544    o #define ATMOSPHERIC_LOADING should be differentiable
4545    o ini_forcing shifted to begining of initialise_varia
4546    o Incorporating QNVS line search routines into MITgcm
4547      (this is separate code, and therefore not under pkg)
4548      lsopt/, optim/
4549    o Updated verification/carbon/
4550      - #define GM_VISBECK_VARIABLE_K
4551      - GM_taper_scheme    = 'ldd97'    
4552    
4553    checkpoint46n_post (2002/11/12)
4554    Merging from release1_p8:
4555    o verification/natl_box:
4556      updating new external_fields_load routine
4557    o New package: pkg/seaice
4558      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
4559      The sea-ice code is based on Hibler (1979-1980).
4560      Two sea-ice dynamic solvers, ADI and LSR, are included.
4561      In addition to computing prognostic sea-ice variables and diagnosing
4562      the forcing/external data fields that drive the ocean model,
4563      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
4564      The implied surface heat flux is then stored in variable
4565      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
4566      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
4567      non-local transport term.  Because this call precedes model
4568      thermodynamics, temperature under sea-ice may not be "exactly" at
4569      the freezing point by the time theta is dumped or time-averaged.
4570      N.B.: fairly large differences in accuracy occur across
4571            different platforms/compilers; comparison between
4572            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
4573            generated output gives:
4574       T           S           U           V
4575      C D M    c        m  s        m  s        m  s        m  s
4576      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
4577      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
4578      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
4579    
4580      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
4581    o GAD:
4582      - generated new common blocks to account for call of
4583        same gad routines with differing traceridentities
4584        (needed to modify tracerIdentity indices in GAD.h)
4585      - generated separate common blocks for case useCubedSphereExchange
4586        (Department of Futurology)
4587      - parameter lists to gmredi_?transport: added tracerIdentity
4588      - added new key indices to tamc.h
4589    o external_fields_load:
4590      - added this routine to TAF list
4591      - needed to make some common blocks global and additional storing
4592        along the same lines as exf package (checkpoint_lev?_directives.h)
4593    o exf:
4594      updated external forcing package
4595      - bug fixes carried over from ecco-branch
4596        (missing OBCS_OPTIONS.h in two routines)
4597      - enable easy to use "no forcing".
4598      - added exf I/O for atmospheric loading
4599      - added exf I/O for runoff data
4600      - transfered scaling between exf <-> MITgcm to exf namelist
4601    o Adding new verification experiment global_with_exf.
4602      This verification experiment is almost identical to the
4603      global_ocean.90x40x15 experiment, except that it uses
4604      the exf (and cal) package instead of the
4605      external_fields_load routine (cf README file).
4606    
4607    checkpoint46m_post (2002/11/07)
4608    o modified testscript to return -- when there are no lines of "%MON" output
4609    o added new flag "quasiHydrostatic" for QH mode
4610      and new routine quasihydrostaticterms()
4611    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
4612      New routine: mom_u_coriolis_nh()
4613    o fixed sign of non-hydrostatic metric terms in u and v equations.
4614      Depend on correct sign of gravitySign.
4615    o added work.pc* to .cvsignore in aim directories using ifc
4616    o introduced flag for controllin non-hydrostatic metric terms
4617    o removed gravitySign from PARM04
4618    o switched to g77/ifc from pgf77 in aim experiments
4619    
4620    checkpoint46l_post (2002/11/01)
4621    o made convective adjustment work with pressure coordinates:
4622     - changed the direction of k-loop in convective_adjustment.F for the
4623       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
4624     - adjusted the reference pressure k-index in convective_adjustment.F
4625     - adjusted the convection condition in convect.F (in analogy to
4626       calc_ivdc.F)
4627     - convective_adjustment no longer computes anything on the halos
4628     - removed the warnings about negative salinity from find_rho.F and
4629       find_alpha.F; instead the new routine look_for_neg_salinity, called
4630       at the beginning of find_rho, find_alpha, and find_beta, does a
4631       check of the entire slice, if CPP-option
4632       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
4633    checkpoint46l_pre (2002/10/23)
4634    
4635    checkpoint46k_post (2002/10/23)
4636    o fixed the verification/global_ocean.90x40x15 experiment:
4637     - new bathymetry (the world according to A., JMC, and M.)
4638     - new initial fields and forcing fields (*.bin files)
4639     - new POLY3.COEFFS (for the next release one should switch to a full
4640       equation of state: JMD95P or MDJWF)
4641     - fixed several errors and redundancies in the data file
4642     - experiment uses looped cells
4643     - added matlab directory with diagnostic scripts for plotting of output
4644    
4645    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
4646     - read AIM physics parameters from a file (data.aimphys)
4647     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
4648    
4649    checkpoint46j_post (2002/10/07)
4650    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
4651    o move wVel computation at the end of the time step, in S/R integr_continuity
4652    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
4653    o update timeave pkg for wVel diagnostic.
4654    checkpoint46j_pre (2002/09/27)
4655    
4656    checkpoint46i_post (2002/09/25)
4657    o Clean up AIM package (and keep the results unchanged):
4658      include CPP_OPTION and use IMPLICT NONE in all routines ;
4659      declare all the variables _RL ; use _d 0 for all numerical constants.
4660      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
4661    
4662    checkpoint46h_post (2002/09/25)
4663    o cleaned up the use of rhoNil and rhoConst.
4664      - rhoNil should only appear in the LINEAR equation of state, everywhere
4665        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
4666        and the dynamical equations are all divided by rhoConst
4667    o introduced new parameter rhoConstFresh, a reference density of fresh
4668      water, to remove the fresh water flux's dependence on rhoNil. The default
4669      value is 999.8 kg/m^3
4670    o cleanup up external_forcing.F and external_forcing_surf.F
4671      - can now be used by both OCEANIC and OCEANICP
4672    checkpoint46h_pre (2002/09/18)
4673    
4674     Added code to convert surface volume flux (fresh water) into
4675     a mass flux when using P coordinates in the ocean (OCEANICP).
4676     Note: It assumes you have set rho0=rhoConst=density of fresh water.
4677    
4678    checkpoint46g_post (2002/09/18)
4679    o Include a new diagnostic variable phiHydLow for the ocean model
4680      - in z-coordinates, it is the bottom pressure anomaly
4681      - in p-coordinates, it is the sea surface elevation
4682      - in both cases, these variable have global drift, reflecting the mass
4683        drift in z-coordinates and the volume drift in p-coordinates
4684      - included time averaging for phiHydLow, be aware of the drift!
4685    o depth-dependent computation of Bo_surf for pressure coordinates
4686      in the ocean (buoyancyRelation='OCEANICP')
4687      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
4688        Theta, Salinity, and Pressure in the parameter list. This routine is
4689        presently contained in find_rho.F. This routine does not give the
4690        correct density for 'POLY3', which would be a z-dependent reference
4691        density.
4692    o cleaned up find_rho
4693      - removed obsolete 'eqn' from the parameter list.
4694    o added two new verification experiments: gop and goz
4695      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
4696    checkpoint46g_pre (2002/09/16)
4697    
4698    checkpoint46f_post (2002/09/16)
4699    o Enable tangent linear (forward mode) gradient checks:
4700      - extended active file handling to g_... files
4701      - added TANGENT_SIMULATION to theSimulationMode
4702      - extended grdchk package accordingly
4703    o added tangent linear setup in verification/carbon/code_ftl
4704    o added adjoint setup in verification/front_relax/code_ad
4705    
4706    checkpoint46e_post (2002/09/05)
4707    o Added new equation of state -> MDJWF
4708      - EOS of McDougall et al., 2002, JAOT, submitted
4709      - caveat: the equation of state is only valid for a smaller (more
4710        realistic?) range of values than JMD95P/Z and UNESCO
4711      - added masks to the calculation of pressure in store_pressure
4712      - added more check values for density in check_eos (ini_eos.F), some of
4713        the old check values are out of the range of the MDJWF-eos, so don't
4714        expect perfect matches for those
4715    checkpoint46e_pre (2002/08/19)
4716    
4717    checkpoint46d_post (2002/08/19)
4718    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
4719      'OCEANICP', also initialised field pressure correctly in ini_eos in the
4720      case of pressure coordinates. eosType='JMD95Z' in
4721      combination with buoyancyRelation='OCEANICP' now causes an error.
4722    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
4723      in find_alpha/beta.
4724    checkpoint46d_pre (2002/08/15)
4725    
4726    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
4727      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
4728    
4729    checkpoint46c_post (2002/08/15)
4730    o Changes necessary for ocean in p-coordinates
4731     -  Added new buoyancy relation = 'OCEANICP'
4732     -  Added new parameters = gravitySign (this used to be contained inside
4733        the factor dRdZ which I added when we first switched to R coordinates).
4734     X GM/Redi is not compatible (yet)
4735     X bottom drag and no-slip need to be debugged.
4736    checkpoint46c_pre (2002/08/07)
4737    
4738    checkpoint46b_post (2002/08/07)
4739    o Added new equation of state -> JMD95Z and JMD95P
4740      - EOS of Jackett and McDougall, 1995, JAOT
4741      - moved all EOS parameters into EOS.h
4742      - new routines ini_eos.F, store_pressure.F
4743    o Added UNESCO EOS, but not recommended because it requires
4744      in-situ temperature (see JMD95)
4745    o Modified formatting for knudsen2.f in utils/knudsen2 and added
4746      unesco.f to be used with POLY3
4747    checkpoint46b_pre (2002/07/31)
4748    
4749    checkpoint46a_post (2002/07/31)
4750    o Added (atmospheric) pressure loading
4751      - new field in FFIELDS.h, etc...
4752      - new cpp flag ATMOSPHERIC_LOADING
4753    o Changed hFacC to _hFacC in calc_phi_hyd.F
4754    o Added SHORTWAVE_HEATING to some files for consistency
4755    checkpoint46a_pre (2002/07/13)
4756    
4757    checkpoint46 (2002/07/13)
4758    further merges from release1_p5
4759    o new ctrl package
4760      - adopted from ECCO environment to enable optimization
4761      - added Eliassen Palm fluxes to controls
4762    o added Eliassen Palm flux controls to gradient check package
4763    o cost package
4764      - Compatible with new ctrl package
4765      - added Eliassen Palm cost hooks
4766      - modif's of existing cost functions
4767    o Adjoint-related bug fixes in kpp:
4768      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
4769      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
4770    o autodiff package
4771      - flow directives:
4772        + new for S/R do_the_model_io
4773        + enhanced for S/R checkpoint
4774        + new gmredi.flow
4775      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
4776        disable adcommon.h/g_common.h by default.
4777      - fixed problem for adjoint of global_max
4778    o modified verification/carbon/
4779    o New setup for adjoint of global_ocean
4780    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
4781    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
4782    o incorporated hooks for sponge layer code (external_forcing.F)
4783    
4784    checkpoint45d_post (2002/07/12)
4785    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
4786    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
4787      (affects plume_on_slope "cg2d" output)
4788    o add new parameter deltaTfreesurf for free-surface time stepping
4789    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
4790    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
4791    o change phiMin in exp1 (to agree with documentation)
4792    o add new flags:
4793     - T,S forcing inside/outside Adams-Bashforth
4794     - turn off temp,salt advection and/or forcing
4795     - for each tracer, define internal flag for multiDimAdvection & A-B
4796    o monitor: change definition of KE to check conservation of Energy
4797    
4798    checkpoint45c_post (2002/05/30)
4799    o Removed f90 comments ("!")
4800    o Modified initialisations to enable exf package for MITgcm
4801      (without invoking ECCO_PACKAGE).
4802    o modifications to gradient check package (Martin Losch)
4803      - enable centered differences
4804      - modified format of standard output
4805    
4806    checkpoint45b_post (2002/05/30)
4807    o cleaned exchange calls in cg2d
4808    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
4809    o included CPP option SINGLE_LAYER_MODE in thermodynamics
4810      to configure barotropic setup (Martin Losch)
4811    o moved some initialisations within bi,bj loop in dynamics
4812      (TAF flow dependency)
4813    o in initialise_varia, moved call packages_init_variables
4814      before convective_adjustment_init
4815      (corresponding adjustment of TAF tape initialisation).
4816    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
4817    
4818    checkpoint45a_post (2002/05/01)
4819    o compute Rho over the whole domain (extend iMin,jMin indices)
4820    o specific exchange for X-slice domain (case Ny=1)
4821    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
4822    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
4823    
4824    checkpoint44h_post = checkpoint45
4825    o Fix to restore differentiability:
4826      place at which packages_init_variables is called in
4827      initialise_varia is crucial for reverse control flow.
4828    o modifications in GMRedi to enable stable adjoint
4829      (corresponding modif's in thermodynamics, dynamics)
4830    o added missing hook for sponge layer code in external_forcing
4831    o modified test cost functions
4832    o storing in gad_advection (plus removal of write(0,*)!
4833    o missing headers TR1.h added in convective_adjustment routines
4834    o errorMessageUnit set non-equal zero in eeboot
4835      (conflict on some platforms, e.g. IBM SP3)
4836    o modified carbon verif.
4837    
4838    checkpoint44h_pre (2002/03/14)
4839    o vertical grid option: allow to put the Interface at the middle between
4840      2 cell-centers ; replace delZ in pkg/kpp by drF.
4841    o GM Advective form: Tracers are advected using the residual transport (=
4842      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
4843    
4844    checkpoint44g_post (2002/03/05)
4845    o fix surface correction term in multiDimAdvection (affects plume_on_slope
4846      results) ; ifdef missing in thermodynamics.F
4847    
4848    checkpoint44f_pre,checkpoint44f_post
4849    o added PTRACERS package
4850      This allows an arbitrary number of passive tracers to be integrated
4851      forward simultaneously with the dynamicaly model.
4852      + Implemented so far:
4853        - basic forward algorithm (time-stepping, advection, diffusion, convection)
4854        - I/O and checkpointing
4855        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
4856      + Not implemented so far:
4857        - KPP
4858        - OBCS
4859      + No specific example supplied (yet) but global_ocean.90x40x15 has the
4860        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
4861        line in data.pkg.
4862      + This package is disabled by default since it increases storage.
4863    
4864    
4865    o testscript: added -cleanup option
4866    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
4867                 b) enable to filter 2D fields.
4868    
4869    checkpoint44e_pre,post
4870    o re-wrote convective adjustment to use pre-calculated weights
4871      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
4872      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
4873      Original calls to convect() still in place.
4874    
4875    chkpt44d_pre,post
4876    o added missing EXCLUDE_MONITOR flags
4877    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
4878      (incompatible typ in MIN/MAX expressions caused problems
4879      on IBM SP3)
4880    o in genmake added variable MAKEDEPEND
4881      plus resetting for case SunOS
4882    o added timer_stats.c routine for IBM SP3
4883    o removed variables in dynamics
4884    !!! I forgot to create tag chkpt44d_pre !!!
4885    !!! But chkpt44d_pre = chkpt44c_post    !!!
4886    
4887    o real fresh water flux implemented with non-linear free-surface.
4888    
4889    chkpt44c_pre,post
4890    o few fix (mask in shap_s2, EmPmR in external_field_load,
4891      USE_NATURAL_BCS in solve_for_P);
4892    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
4893    
4894    checkpoint44b_pre/_post
4895    o merge of relevant stuff from the ecco-branch:
4896      - genmake: removed $S64 overwrite for case SunOS
4897      - pkg/exf: update and corrections for field swapping and obcs
4898      - pkg/ecco: parameter lists for the_model_main, the_main_loop
4899                  harmonized between ECCO and MITgcm
4900      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
4901                      updated checkpointing_lev... lists for obcs
4902      - model/src: minor changes in forward_step, plot_field
4903                   added directive for divided adjoint in the_main_loop
4904      - pkg/mdsio: added mdsio_gl_slice
4905    
4906    o check parameters & config (chkpt44a_pre,post)
4907    o OBC and NonLin_FrSurf.
4908    
4909    checkpoint44 (2002/01/18)
4910    o fix bug in mom_vi_del2uv
4911    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
4912    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
4913    o update AIM experiments (NCEP input files)
4914    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
4915    o added some stuff for AD
4916    
4917    checkpoint43 (2001/09/28)
4918    o added two new advection tests
4919    o added global 4x4 degree ocean test
4920    o added test of H&S94 with free surface on cube
4921    o some final mods for gradient check, adjoint,...
4922    
4923    checkpoint42 (2001/09/27)
4924      Fixed AD-related problems:
4925    o Store directives up-to-date with re-arranged Adams-Bashforth
4926      (mainly thermodynamics.F)
4927    o New store directives for multi-dim. advection schemes
4928      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
4929      * new common block and key passkey
4930      (mainly gad_advection.F)
4931    o Modified store directives for split of dynamics/thermodynamics
4932      for the case ALLOW_KPP
4933    o Cleaned argument list for timestep_tracer.F
4934    
4935    checkpoint41 (2001/09/27)
4936    o re-formatted/added comments in prologues of key subroutines
4937      to work with protex
4938    
4939    checkpoint40 (2001/09/27)
4940    o moved calc_gs, calc_gt and calc_tr1 back to model/src
4941    o added FLT (floats) package from Arne along with demo. experiment
4942    o re-arranged Adams-Bashforth scheme for tracers to allow easier
4943      implementation of forward-in-time forcing terms
4944    o more mods for non-linear free-surface including new variable
4945    o modified multi-dim method to work on cube
4946    o bug fix in KPP (from DM)
4947    
4948    checkpoint40pre9 (2001/09/27)
4949    o added DST advection schemes
4950    o fix MPI bug on SGI's
4951    o modifications for non-linear free-surface
4952    o fixed conditionals for fixed flow/passive tracer only mode
4953    o added tension/strain form of stress tensor
4954    o changes to commenting of arguments for TAF/TAMC
4955    o added/updated many matlab scripts
4956    o added multi-dimensional advection method for tracers
4957      
4958    checkpoint40pre8 (2001/09/05)
4959    o new package rw/
4960      Added method for dumping intermediate local arrays:
4961      mdsio_writetile - same as mdsio_writefield except works from inside
4962                        bi,bj loop
4963      mdsio_writelocal - same as mdsio_writetile except works for local
4964                         arrays
4965      write_local_r? - higher-level wrapper for mdsio_writelocal
4966      Controlled by diagFreq. Defaults to zero (ie. no dumps)
4967      Example given at end of mom_vecinv.F that dumps some local arrays.
4968    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
4969      control flux-form versus vector invariant code.
4970      Switch is runtime flag vectorInvariantMomentum (defaults to false)
4971      or genmake -DISABLE ...
4972    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
4973      (additional storing is now needed for case vecinv;
4974      currently nothing implemented to switch this storing off
4975      in case fluxform is used since no CPP flag available).
4976    
4977    checkpoint40pre7 (2001/08/14)
4978    o bug fix in dynamics.F
4979      calc_viscosity called before k=1,Nr loop.
4980    o added some #ifdef's ALLOW_PASSIVE_TRACER
4981    o cleaned initialisations in ctrl_map_ini
4982      related to TAF
4983    
4984    checkpoint40pre6 (2001/08/13)
4985    o split dynamics into thermodynamics & dynamics
4986    o corresponding split of calc_diffusivity into
4987      calc_diffusivity, calc_viscosity
4988      (kpp_calc_diff, kpp_calc_visc).
4989    o Added diffkr, kapgm to control variables
4990    o bug fix in gmredi_slope_limit for ldd97
4991    
4992    checkpoint40pre5 (2001/07/31)
4993    o proper initialization of Adams-Bashforth time stepping
4994      + uses forward step for very first step of model (iter=0)
4995    o re-generated *all* output since almost all output is modified by this
4996      change (sorry but we've been putting this one off for about 2 years)
4997      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
4998        *not* regenerated since they are already out of date and I don't
4999        want to create the impression that they are suddenly working.
5000    o removed KAP stuff for DEC's
5001    o modified/added many .cvsignore files in */code and */input
5002    o added new expt "solid-body.cs-32x32x1"
5003      + this uses an alternative form of ini_curvilinear_grid.F which
5004        is not necessarily any better than the current one...
5005    
5006    checkpoint40pre4 (2001/07/30)
5007    o added re-initialisations of utrans,vtrans,rtrans in
5008      calc_common_factors which are crucial for TAF.
5009    o extended iMin,jMin range for calc_common_factors,
5010      calc_diffusivity
5011    o added option ALLOW_PASSIVE_TRACER
5012    o a few minor updates and fixes
5013    
5014    checkpoint40pre3 (2001/07/13)
5015    o created calc_gtr1.F for gad package
5016    o split the_main_loop and re-introduced forward_step
5017    o some recomputations of nIter0 for TAMC
5018    
5019    checkpoint40pre2 (2001/07/13)
5020    o Updated to latest branch of AJA, JMC
5021    o Added gradient check package
5022    o Added routines for passive tracer handling
5023    o Added carbon sequestration sensitivity experiment
5024    
5025    checkpoint39 (2001/05/14)
5026     o Modifications and fixes to support TAMC
5027       (mainly missing or wrong directives)
5028     o Corrected common blocks when fooling TAMC to produce adjoint I/O
5029       in addummy_in_stepping
5030     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
5031     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
5032     o Included following packages:
5033       cal: calendar
5034       exf: external forcing
5035       ecco: essential routines to control use of cal, exf
5036             (NB: this is not the full ECCO environment)
5037     o disabled some packages by default in genmake
5038    
5039    checkpoint38 (2001/04/10)
5040     o see notes_c37_adj.txt
5041     o corrected wrong layer index in external_forcing_t
5042     o replaced the_main_loop/forward_step by the_main_loop
5043     o removed forceoutput from write_state
5044       (replaced criteria for initial/final state)
5045     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
5046    
5047    checkpoint37 (2001/03/13)
5048     o mdsio.F routine split and packaged in pkg/mdsio
5049       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
5050        used unless genmake -disable=mdsio)
5051     o allow a more precise surface-geopotential gradient for the atmosphere
5052       taking into account the change in space of Alpha (=1/rho) at the surface.
5053     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
5054       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
5055     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
5056       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
5057       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
5058     o Time-Average diagnostics defined as a pseudo package "timeave".
5059     o pickup files : old pickup (before c35) did not work with new code (c35
5060       and after) unless activating 2 commented lines in initialise-varia.
5061     o Non-Hydrostatic pickup file Pb fixed.
5062     o bug with Rigid-lid version (since c35) fixed.  
5063    
5064    checkpoint36 (2001/02/20)
5065     o implement Crank-Nickelson barotropic time-stepping
5066     o recover Time-Average diagnostics
5067     o fix Pb in checkpoint (PR#19)
5068     o AIM become a standard package ; clean unused CPP_kees
5069    
5070    checkpoint35 (2001/02/08)
5071     o subtantial rewrite of dynamics.f
5072     o allows staggered time-stepping
5073     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
5074     o added bottom drag (linear + quadratic)
5075    
5076    checkpoint34 (2001/01/30)
5077     o Modified exchange routines for correct reverse simulation.
5078     o Added verification output to comply with bug fix in impldiff.F
5079       as of c33 (exp2, natl_box).
5080     o Corrected store directives in dynamics.F
5081     o Corrected array boundaries in impldiff.F
5082     o Corrected array dimensions in gmredi.
5083       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
5084     o Added routine GLOBAL_SUM_INT to global_sum.F
5085     o Added mdsio_gl.F for ECCO purposes.
5086    
5087    checkpoint33 (2000/11/30)
5088     o Fixed bug in lower BC in impldiff.F
5089     o Fixed confusion about units of forcing arrays in FFIELDS.h
5090       namely Fu,Fv,Qnet,Qsw,EmPmR:
5091       - Removed verification/natl_box/code/external_fields_scale.F
5092         (did not differ from that in model/src)
5093       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
5094         (see FFIELDS.h for description)
5095       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
5096         kpp_calc.F and kpp_transport_t.F
5097       - Removed model/src/external_fields_scale.F and calls to it
5098       - verification/natl_box uses flux data with "atmospheric" sign so
5099         a special version of external_fields_load.F is used to
5100         change the data as it's read in. This way, the arrays
5101         have the right units and signs at all times tha a user could
5102         possibly use them.
5103     o Corrected genmake to delete a temporary file during configuration
5104    
5105    checkpoint32 (2000/11/13)
5106     o Scaling of forcing fields moved from external_forcing.F to
5107       external_fields_scale.F, called directly after loading fields.
5108     o Surface relaxation terms added to surface tendency fields in
5109       extra subroutine.
5110     o impldiff.F changed to avoid storing by TAMC of huge intermediate
5111       fields.
5112     o Changes in GMRedi to comply with packaging structure.
5113     o Modifications and bug fixes in KPP package.
5114     o Verification experiment for KPP added (verification/nat_box/)
5115    
5116    checkpoint31 (2000/09/11)
5117     o Packages interface brought in line with defined standard
5118       -> new routines packages_...F
5119       -> changes in initialise_fixed.F, initialise_varia.F
5120       -> enables initialisation interface for ECCO package
5121     o Rescaling of external forcing fields immediately after read
5122       (removed from external_forcing.F)
5123       -> new: surface_fields_scale.F
5124       -> affects ini_foorcing.F, external_fields_load.F
5125     o Computation of surface tendencies before tendency updates.
5126       -> new: external_forcing_surf.F
5127     o Change of variable names useGMRedi, useKPP, useECCO
5128     o Further changes in dynamics.F, impldiff.F for TAMC
5129     o Tested for experiments 0, 2, 4.
5130       - not yet tested for GMRedi.
5131       - not yet tested for KPP.
5132    
5133    checkpoint30 (2000/07/13)
5134     o Updates for OBCs
5135     o New experiment for test OBCs (internal_wave)
5136     o New output.txt in verification/exp4/results/
5137     o Updates for KPP: calculation of viscosity corrected, new variables
5138       kpp_dumpFreq and kpp_taveFreq
5139     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
5140       and entry for T90 in genmake
5141    
5142    checkpoint29 (2000/06/21)
5143     o packaged KPP and GM/Redi
5144    
5145    checkpoint28 (2000/06/09)
5146     o Corrected initialization of hFacMin for difference vertical coordinates
5147     o Modified calculation of partial cell thickness to more robust algorithm
5148     o config_summary.F: replaced write_1D_... by write_0D_...
5149       read_write.F: added subroutines write_0D_...
5150     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
5151       included some initialisations required for TAMC.
5152     o routine calc_isoslopes: modified sqrt computation to make it
5153       differentiable for zero argument.
5154     o routines dynamics, impldiff:
5155       included store directives and tape key computations required for TAMC.
5156     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
5157    
5158    checkpoint27 (2000/04/10)
5159     o fixed calc_isoslopes() to so that cancellation of terms in tensor
5160       formulation works properly with variable resolution.
5161     o restructured the calling tree between the_model_main() and dynamics()
5162     o split initialise() into initialise_fixed() and initialise_varia()
5163     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
5164       in new routine ini_psurf()
5165    
5166    checkpoint26 (2000/04/05)
5167     o moved some #ifdef in optional routines to encompass everything
5168       except the argument declarations. This was using up some memory.
5169     o fixed macros like _ADT to work with both versions of Linux cpp
5170     o cleaned up some unused and uninitialized variables
5171       (helps when debugging with strict compile options)
5172     o split up CPP_EEOPTIONS.h into options and macros
5173       (macros are now in eesupp/inc/CPP_EEMACROS.h)
5174     o patch for 2 processor JAM mode
5175    
5176    checkpoint25 (2000/03/15)
5177     o updates for OBCs and NH
5178     o dramatically reduced memory usage
5179     o added "JAM" routines for use on Artic network
5180     o parameterization of convection by implicit vertical diffusion
5181     o added a diagnostic of convective index
5182     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
5183       (this is was partly for OBCs and NH but also in anticipation of
5184        an explicit free-surface option)
5185     o initial state input files for U and V
5186    
5187    checkpoint24 (1999/08/02)
5188     o Removed some spurious "REAL"s
5189     o Updated KPP to latest version from JPL
5190     o Added a COS(latitude) in horizontal viscosity
5191    
5192    checkpoint23 (1999/05/26)
5193     o Added del^4 diffusion for salt and temperature
5194     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
5195    
5196    checkpoint22 (1999/05/18)
5197     o Made many small changes: implicit none, format(i5), etc...
5198     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
5199    
5200    checkpoint21 (1999/05/18)
5201     o Introduced new I/O package that supports direct-access records (mdsio.F)
5202     o Split-up mid-level I/O routines
5203     o Updated input data for experiments 0,1,2,4 and 5
5204     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
5205    
5206    checkpoint20 (1999/03/22)
5207     o Tidied up open-boundaries some more
5208     o Added non-hydrostatic code
5209     o Fixed some input data
5210     o Modified MPI start-up to work in "coupled" context.
5211    
5212    checkpoint19 (1998/12/15)
5213     o Tidied up directory structure for verification experiments.
5214     o Added new code for open boundaries.
5215     o Corrected advective terms near boundaries.
5216     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
5217     o Implemented free-slip/no-slip BCs and del^4 dissipation.
5218     o Split default parameters out of ini_parms.F into set_defaults.F.
5219    
5220    checkpoint18 (1998/11/30)
5221   o Further changes for optional code generation with   o Further changes for optional code generation with
5222     CPP - ugh!     CPP - ugh!
5223    
5224  checkpoint17  checkpoint17 (1998/11/03)
5225   o Beginning to incorporating modularity   o Beginning to incorporating modularity
5226     for supporting atmos. and ocean configs.     for supporting atmos. and ocean configs.
5227   o Small changes for TAMC complinace   o Small changes for TAMC complinace
5228   o New ultra simple test case. Barotropic box   o New ultra simple test case. Barotropic box
5229     configuration "exp0".     configuration "exp0".
5230    
5231  checkpoint16  checkpoint16 (1998/10/28)
5232   o Minor changes to exchange routines to support   o Minor changes to exchange routines to support
5233     accumulation in reverse mode. Adjoint of an     accumulation in reverse mode. Adjoint of an
5234     assignment is an addition.     assignment is an addition.
# Line 22  checkpoint16 Line 5236  checkpoint16
5236     syntax) and by g77 under Linux ( 72 character     syntax) and by g77 under Linux ( 72 character
5237     limit ).     limit ).
5238    
5239  checkpoint15  checkpoint15 (1998/09/29)
5240   Rewrote exchange routines to allow   Rewrote exchange routines to allow
5241   o General tile <-> tile connectivity.   o General tile <-> tile connectivity.
5242   o TAMC reverse mode flag ( is this really needed? )   o TAMC reverse mode flag ( is this really needed? )
# Line 31  checkpoint15 Line 5245  checkpoint15
5245     shmput/shmget, VIA, SYSV shmem and every other cool     shmput/shmget, VIA, SYSV shmem and every other cool
5246     communication method.     communication method.
5247    
5248  checkpoint14  checkpoint14 (1998/09/09)
5249   Consistent isomorphism chages made. These allow dynamical core   Consistent isomorphism chages made. These allow dynamical core
5250   to support both pressure and meters as a vertical coordinate.   to support both pressure and meters as a vertical coordinate.
5251    
5252  checkpoint13  checkpoint13 (1998/07/17)
5253   Release which corrects global_max problem and a couple   Release which corrects global_max problem and a couple
5254   of KGM time-averaging diagnostic errors. Also contains   of KGM time-averaging diagnostic errors. Also contains
5255   a double-gyre experiment setup as well as the baseline   a double-gyre experiment setup as well as the baseline
# Line 50  branch-point-rdot Line 5264  branch-point-rdot
5264   I don't want to commit the rDot to the main-trunk until   I don't want to commit the rDot to the main-trunk until
5265   we've actually tested it...   we've actually tested it...
5266    
5267  checkpoint12  checkpoint12 (1998/07/08)
5268   Tidy up and added generic genmake script (formerly   Tidy up and added generic genmake script (formerly
5269   configure script).   configure script).
5270   Released to testers.   Released to testers.
5271    
5272  checkpoint11  checkpoint11 (1998/07/02)
5273   Re-arranged initialise() and introduced ini_vertical_grid()   Re-arranged initialise() and introduced ini_vertical_grid()
5274   and ini_masks_etc().   and ini_masks_etc().
5275    
5276  checkpoint10  checkpoint10 (1998/07/01)
5277   Introduced the configure script.   Introduced the configure script.
5278   Separated out the diags package.   Separated out the diags package.
5279   Added template for writing time-averages of tile/intermediate quantities.   Added template for writing time-averages of tile/intermediate quantities.
5280   Updated SIZE.h in exp2 and made the data big-endian.   Updated SIZE.h in exp2 and made the data big-endian.
5281    
5282  checkpoint9  checkpoint9 (1998/06/22)
5283   MPI fix. Filename changes (meta/data). salbin*y stuff.   MPI fix. Filename changes (meta/data). salbin*y stuff.
5284   General tidy-up.   General tidy-up.
5285   SST.bin SSS.bin added to verification/exp2   SST.bin SSS.bin added to verification/exp2
5286    
5287  checkpoint8  checkpoint8 (1998/06/22)
5288   Inludes time-dependant forcing and time-averaging.   Inludes time-dependant forcing and time-averaging.
5289   Works at 4x4 and 2.8125x2.8125 global   Works at 4x4 and 2.8125x2.8125 global
5290    
# Line 80  checkpoint7-4degree-ref Line 5294  checkpoint7-4degree-ref
5294   model etc..   model etc..
5295   Configured for verification/exp2 - 4 degree global, two process.   Configured for verification/exp2 - 4 degree global, two process.
5296    
5297  checkpoint7  checkpoint7 (1998/06/15)
5298   Created by cnh   Created by cnh
5299   Simple 4 degree global simulation   Simple 4 degree global simulation
5300   configuration.   configuration.
# Line 88  checkpoint7 Line 5302  checkpoint7
5302   hydrography, bathymetry etc   hydrography, bathymetry etc
5303   Does not include Heat Flux and E-P   Does not include Heat Flux and E-P
5304    
5305  checkpoint6  checkpoint6 (1998/06/08)
5306   Created by cnh   Created by cnh
5307   merged checkpoint5 with CD and   merged checkpoint5 with CD and
5308   spherical polar code.   spherical polar code.
5309   Still some problems with GM Redi   Still some problems with GM Redi
5310   abd full topography.   abd full topography.
5311    
5312  checkpoint5  checkpoint5 (1998/06/08)
5313   Created by AJA   Created by AJA
5314   contains updates to GM Redi   contains updates to GM Redi
5315   and reordered timestepping loop   and reordered timestepping loop
5316   for Implicit Diffusion.   for Implicit Diffusion.
5317    
5318  checkpoint4  checkpoint4 (1998/05/30)
5319   Created by cnh   Created by cnh
5320   Contains memory saving macros ( _rdxc etc..) for when   Contains memory saving macros ( _rdxc etc..) for when
5321   grid variations are limited.   grid variations are limited.
5322   Contains polynomial coeffs for EOS and knudsen program   Contains polynomial coeffs for EOS and knudsen program
5323   for generation.   for generation.
5324    
5325  checkpoint3  checkpoint3 (1998/05/26)
5326   Created by cnh   Created by cnh
5327   Added extra flags for runtime options   Added extra flags for runtime options
5328   Added this file   Added this file

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