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revision 1.32 by adcroft, Thu Nov 30 16:51:40 2000 UTC revision 1.1011 by jmc, Tue Jul 29 21:17:45 2008 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    o exch2:
8     - change index-bounds storage (moved from target to local tile,
9       more intuitive this way) ; rename/remove some variables.
10     - change utils/exch2/matlab-topology-generator accordingly.
11    
12    checkpoint61a
13    o exch2/matlab-topology-generator:
14      fix bug in index bounds for N-S internal exchange (hard to tell if this
15      had any effect on the solution).
16    o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
17      is exceeded
18    o testreport: modify syntax of awk, so that it works also with
19      awk, and not only with nawk and gawk
20    
21    checkpoint61
22    o autodiff
23      Change default for TAF usage by removing argument '-nonew_arg'
24      This changes TAF subroutine argument list (ordering of active var.)
25      Omission of this flag leads to incompatibility w.r.t. TAMC
26      To restore TAMC-compatibility, need following modifs:
27      * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
28      * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
29      Tested TAF version is 1.9.22
30      N.B.: exch2 hand-written adjoint code currently not TAMC compatible
31    
32    checkpoint60
33    --->>> This is the last checkpoint for which generating the adjoint
34    --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
35    --->>> by default.
36    --->>> Future checkpoints will ommit this flag by default.
37    o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
38    o pkg/grdchk: Add gradient check to etan0 perturbations.
39    o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
40    o pkg/autodiff: more flexibility in zeroadj.
41      model/src: modifying do_oceanic_phys.F accordingly.
42    o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
43    o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
44      special setup of gmredi for which the adjoint is stable
45      enough for parameter optimization.
46    o bridging the gap between eddy stress and GM.
47      -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
48          along with a change in CPP option (now ALLOW_EDDYPSI).
49      -> when using GM w/ GM_AdvForm:
50          The total eddy streamfunction (Psi = eddyPsi + K x Slope)
51          is applied either in the tracer Eq. or in momentum Eq.
52          depending on data.gmredi (intro. GM_InMomAsStress).
53      -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
54      The key modifications are in model/src/taueddy_external_forcing.F
55      pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
56    
57    checkpoint59r
58    o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
59      from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
60      fix option to read coriolis(@ cell-corner) from files with CS-grid.
61    o pkg/mnc: add some attributes to standard 1D-coordinate variables
62    o pkg/diagnostics: enforce missing_value attribute for scalar variables at
63      mass points, when using mnc for output
64      - add runtime parameter (missing_value, missing_value_int) to override
65        default (which is the value of getcon('UNDEF'))
66    o pkg/mnc: prepare mnc for the actual use of missing values with the
67      diagnostics package: small fix in mnc_cw_readwrite.template and more
68      initialisation of never used fields
69      - replace mnc_common.h and mnc_id_header.h with corresponding upper case
70      versions
71    o pkg/thsice/thsice_ini_vars.F added default initial values so that
72      thermodynamics sea ice solver does not blow up when some initial fields
73      are missing.
74    o move from external_forcing_surf.F to ini_forcing.F
75      the p-coord. hack consisting in using pLoad to set phi0surf ;
76      update output of tutorial_global_oce_in_p (affected @ truncation level).
77    o Freshen up a bit hs94.1x64x5, notably:
78      remove rotationPeriod and tRef=5*0. (adjoint only), and add
79      exactConserv=.TRUE.
80    o pkg/generic_advdiff:
81      change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
82      applies to files where Temperature & Salinity 2nd Order moments are used.
83    o pkg/ptracers: add second-order moment advection schemes (80 and 81);
84      this uses a dynamically allocated internal state data structure
85      (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
86      and requires a fortran 90 compiler
87    
88    checkpoint59q
89    o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
90       (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
91    o Refresh tutorial_global_oce_biogeo, notably:
92      - change bathymetry (put back seamounts in ACC, use hFacs)
93      - change EOS (POLY3 --> JMD95Z)
94      - use Bryan-Lewis vertical diffusivity
95      - use multidimensional advection
96      - remove old virtual virtual in dic pkg, now done through ptracer pkg
97      - change a couple of parameters in dic pkg
98    o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
99    o pkg/obcs: change default to OBCSfixTopo = .true.,
100      - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
101      - replace "debugMode" with "debugLevel .GE. debLevB"
102    o implementation of TAF directives for gchem,cfc,dic
103    o remove "exp5" (replaced by tutorial_deep_convection).
104    o pkg/obcs: add code to fix topography gradients normal to open boundaries;
105      this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
106      the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
107      --> changes results in exp4, seaice_obcs
108    o tutorial_deep_convection :
109      update the set-up and increase resolution and domain size ; start
110      from pseudo initial conditions = output at t=120mn in order to see
111      something happening when running testreport.
112    o pkg/seaice: add os7mp as an advection scheme
113                  add check for advection schemes
114                  add a flag for restoring T and S underneath sea ice
115    o pkg/my82: add netcdf-support and diagnostics
116    o thsice pkg:
117      - Now hsMax limits snow height by turning it into ice following
118        flooding scheme (and now conserving energy)
119      - Slight rewriting of the formula in thsice_calc_thick.F
120      - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
121      --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
122    
123    checkpoint59p
124    o gchem / dic / cfc :
125      - add useDIC, useCFC , read from "data.gchem" (& hold in GCHEM.h);
126      - add new parameter files: "data.dic" & "data.cfc" ;
127      - various re-arrangement in initialisation & header file ;
128      - fix tutorial_global_oce_biogeo for multi-threaded test.
129    o pkg/dic: test for "pickup_dic" file when restarting ;
130      if no pickup-file, can restart with a re-initialised pH (same as it did
131      before) providing pickupStrictlyMatch is set to False.
132    o change argument list of S/R PTRACERS_WRITE_PICKUP & MYPACKAGE_WRITE_PICKUP
133      + fix call to S/R GGL90_WRITE_PICKUP & DIC_WRITE_PICKUP
134    o add a "warning" (to Error msg file) when an Active Tracer is not using AB-2
135      and staggerTimeStep is off (needed for stability of Internal-wave dynamics).
136    o move out of PARAMS.h & data the last pieces of old-ptracer code: tauTr1ClimRelax,
137     & lambdaTr1ClimRelax ; put those 2 params in PTRACERS_PARAMS.h & data.ptracers
138       (note: not clear to me what lambdaTr1ClimRelax is still used for ...)
139    o pkg/mom_vecinv: - new parameter "selectVortScheme" to select which
140       scheme to use for vorticty-term ;
141     - compute upwindVorticity=T case within mom_vi_u/v_coriolis_c4.F
142       (with default selectVortScheme, return to original discretisation)
143     - remove weird combination (e.g.: upwindVorticity & highOrderVorticity)
144    o pkg/seaice: add a line to the summary to indicate grid type (B/C)
145    o in mom_calc_visc, fix average value of viscAh_W & viscA4_W next to the
146      bottom ; only used with variable horizontal viscosity and non-hydrostatic.
147      also fix diagnostics VISCAHW & VISCA4W.
148    
149    checkpoint59o
150    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
151    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
152      move a few statemens out the main loop into separate loops
153    o pkg/shelfice:
154      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
155        (kg/m^2/s), does not break tests, because in verification/isomip,
156        rhoConstFresh=rhoConst (by accident)
157      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
158      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
159        new file model/src/seawater.F, so that they are available for all pkgs.
160      - convert potential temperature into in-situ temperature. This changes the
161        isomip tests => update tests
162    o add a flag writePickupAtEnd (default=true) to be able to suppress
163      writing a pickup at the last timestep
164    o tools/mpack-1.6 :
165      - disable automake (not working) and autoconf (not needed).
166      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
167        also cleaner with much less compilation warnings.
168    o pkg/profiles:
169      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
170      (for "less than 32 characters name" compiler requirement)
171    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
172      conditions that have a different sampling frequency than S/T/U/V obcs
173    o pkg/diagnostics (stats-diags):
174      - fix global Min/Max in case 1 processor get only empty tiles
175    o genmake2: replace (4 times)
176         make genmake_tc_1.o >> genmake_warnings 2>&1
177      with
178         COMM="$CC $CFLAGS -c genmake_tc_1.c"
179         echo $COMM >> genmake_warnings
180         $COMM >> genmake_warnings 2>&1
181      to make genmake2 always see the value of CC as specified in the optfile.
182    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
183      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
184      - modify verification advect_cs test to test SOM-advection on CS-grid.
185    o pkg/ctrl:
186      - Rewrite of ctrl_map_ini_ecco.F,
187        introducing a generic routine (ctrl_map_ini_gen.F).
188      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
189    
190    checkpoint59n
191    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
192      number in dedicate array "hdiag":
193      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
194        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
195      - many small changes (integer format) for large number of diagnostics
196      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
197        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
198    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
199      usingSphericalGrid, this allows to define the rotated grid coordinates
200      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
201      geographical coordinates according to the inverse of the rotation defined
202      by the Euler angles, so that Coriolis parameter and online-interpolation by
203      exf works with the geographical coordinates on XC/YC/XG/YG.
204      Naturally, this feature does not work with all packages, so some
205      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
206      profiles), because there the coordinates are assumed to be regular
207      spherical grid coordinates.
208    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
209      - introduce isopycnal diffusion coefficient control.
210    o tools/adjoint_options:
211      - additional control vector components.
212    o pkg/mnc: have mnc create marginally meaning full coordinate variables
213      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
214    o pkg/mypackage:
215      - add example of read/write pickup for state-var ;
216      - add entry points to the main code for state-vars diags & write-pickup.
217    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
218      transitions for useExfYearlyFields
219      - add new subroutine that determines the file to read from for
220        use*YearlyFields = .TRUE. and .FALSE.
221      - add a verification experiment to global_with_exf that tests
222        useExfYearlyFields with USE_EXF_INTERPOLATION defined
223    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
224      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
225      subroutines (which could be generated from a template, because they are
226      almost identical), for now they are included in obcs_prescribe_read.F for
227      simplicity
228    o pkg/exf:
229      - add a little more diagnostic to exf_interp_read (in analogy to
230        mds_read_field, can be turned off with debugLevel < debugLevA=1)
231      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
232        ugly but fast by unrolling short inner loops, inserting a unroll=8
233        directive in routine lagran, and splitting a loop and making do while the
234        outermost loop (the latter requires the intoduction of index arrays)
235    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
236    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
237      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
238    o verification/seaice_obcs: updated for restart test and latest options
239    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
240      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
241      for now this is only available for the C-grid code and also within
242      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
243    
244    checkpoint59m
245    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
246      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
247    o gad_som : fix flux output (& diagnostics) to have same units as other  
248      advection scheme fluxes (was previously multiplied by deltaT).  
249    o added verification/seaice_obcs both to test seaice open boundaries
250      and to provide an example matlab scrpt for generating them
251    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
252    o pkg/salt_plume: clean up salt_plume_frac.F to
253      remove redundancy in PlumeMethod 1 and 4
254    o pkg/kpp: added saltplume diagnostics
255    o pkg/obcs and pkg/seaice:
256      - do not set uice and vice to zero when OB*icefile are unspecified
257      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
258      - moved seaice tracer obcs after call to seaice_growth
259    o pkg/salt_plume: added various options for salt plume depth
260      criterion and for vertical distribution of the salt
261    
262    checkpoint59l
263    o pkg/ptracers: new version of ptracers pickup:
264      read meta file and write only fields which are needed to restart.
265      ( same logic as main pickup file ; also using pickupStrictlyMatch )
266    o pkg/seaice:
267      - add timescale for melting due to warm mixed layer as a means of
268        setting SEAICE_availHeatFrac more conveniently
269      - add a CPP-flag/runtime parameter check for flooding algorithm
270      - reformulated availHeat in seaice_growth.F to be independent of AREA
271    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
272      unit changes
273    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
274    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
275      SX vector computer.
276    o pkg/seaice:
277      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
278        seaice forcing fields can now be read only through pkg/exf
279      - removed some unused halos
280    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
281    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
282      or U/VICE from U/VWIND before computing U/VSTRESS
283    
284    checkpoint59k
285    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
286      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
287    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
288      all experiments pass when compile with un-initialised var. checking option.
289    o added pkg/salt_plume
290    o script to test restart (for now, in MITgcm_contrib/jmc_script)
291    o pkg/seaice: new read/write pickup version.
292      read meta file and write only fields which are needed to restart.
293      ( same logic as main pickup file ; also using pickupStrictlyMatch )
294    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
295    o lab_sea.hb87: modify the domain & update output.hb87.txt :
296      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
297      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
298      process. Fixed here by closing the domain at the Northern boundary.
299    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
300    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
301      a set of consecutive levels in/from a 3-D array.
302    o pkg/ptracers:
303      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
304      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
305    
306    checkpoint59j
307    o in pkgs: dic, obcs, offline, rbcs:
308      standard way to compute coeff. for time interpolation between 2 time reccords
309      which retains full precision (& make results less dependent on compiler).
310      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
311    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
312      packages instead of reading ice cover and wind speed separately
313    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
314     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
315      to allow to compile customized code before the update)
316    o cleaning-up:
317      - fix CPP instruction syntax in pkg/obcs
318      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
319        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
320      - fix some threads issue in IO parts.
321    o pkg/dic:
322      - add tons of "_d 0" (--> much better testreports !)
323       and then update outputs of tutorial_global_oce_biogeo
324    o pkg/mom_fluxform:
325      add a special version of momentum advection intended to conserve momentum
326      next to a bathymetry step or a coastline edge. (default = off = #undef)
327    o new read/write pickup version:
328      - for now, only implemented for main (mdsio) pickup file.
329      - write out only what is needed to restart; merge pickup_nh , pickup_ph
330        and main pickup together.
331      - read meta file; read only what is needed to restart; stop if a field
332        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
333        if it make sense (even if the restart is not perfect).
334      - if no meta file, assume that pickup to read corresponds exactly to
335        a pickup that would currently be written.
336      - read pickup written in the old format (until checkpoint59i) if it
337        recognizes an old meta file (no field-list).
338      - add a meta file in exp. which starts from a pickup: 2 cases:
339        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
340         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
341        b) a meta file describing the content of the associated pickup file
342         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
343    o pkg/mdsio & pkg/rw:
344      - new routine to read a meta file ; new set of routine to read
345        Multiple-fields file (with meta file).
346    o added open boundary conditions capability for seaice
347        HSNOW, HSALT, UICE, and VICE
348    
349    checkpoint59i
350    o adjoint:
351      * fix multiDimAdvection adjoint
352        (partial recomputation problem by TAF for fVerT(:,:,kDown)
353        and comlev1 size definition (maxpass vs. max. number of tracers)
354      * verification/global_ocean.90x45x15 adjoint now tests
355        NLFS and multiDimAdvection using DST3 (=30)
356      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
357    o pkg/kpp: add "_d 0" to real constant (if missing);
358      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
359      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
360    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
361      for internal parameters related to restart process (formerly from PARAMS.h)
362      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
363    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
364      as argument. (only atm2d & obcs write_pickup have not yet been updated)
365    o pkg/monitor:
366      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
367      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
368      - account for deep Atmosphere factor and density factor (anelastic)
369    o added open boundary conditions capability for seaice HEFF and AREA
370    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
371      thermodynamics
372      - requires a little reorganization, which affects the testreport results
373        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
374        so that now the conservative form is tested
375      - add a few comments
376    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
377    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
378    o add new diagnostics to seaice: advective, diffusive fluxes (only for
379      multidim-advection, for scheme 2 they are not filled) and transports,
380      thermodynamic growth rates
381    o change units of EmPmR (inside the code, + within coupling interface)
382      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
383      Affects results @ truncation level (cg2d match) and update output of
384       experiments: lab_sea(6), global_ocean.90x40x15(10),
385      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
386      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
387      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
388      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
389    
390    checkpoint59h
391    o pkg/exf:
392      - improve vectorization by moving if-statement out of loops in
393        exf_mapfields, exf_radiation
394      - exf_bulkformulae.F: introduce 2D fields and vectorize code
395    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
396    o testreport:
397      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
398        monitor & update offline_exf_seaice exp. output.
399      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
400    o pkg/seaice:
401      - bug fix in the evp solver: boundary conditions were affected be
402        masking of zMax/zMin (changes results)
403      - minor bug fix in boundary conditions in seaice_calc_strainrates
404        (changes results for no_slip)
405      - seaice_lsr.F: make interpolation of eta dependent on boundaries
406      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
407      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
408        stress formulation and no-slip boundary conditions
409    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
410      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
411    o pkg/seaice: a first HSALT time stepping equation has been checked in
412    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
413      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
414      without requiring DO-IF statements
415    o pkg/thsice:
416      use continuous power-law function for partition of energy between lateral
417      melting/freezing and thinning/thickening ; old code using step function
418      still available with #undef THSICE_FRACEN_POWERLAW
419      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
420    o testreport: change AD testing : check against results/output_adm.txt
421      using same scripts as for forward test.
422    
423    checkpoint59g
424    o adjoint testing: in preparation for changing testreport:
425      - output format: cost and grad written on separated lines
426      - ad output results in directory "results" (instead of "results_ad")
427    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
428    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
429    o pkg/ecco: allow user defined cost function contributions
430    o testreport:
431      Allow to choose (per experiment) the list of tested output variables
432       and the main variable (used to issue a pass/FAIL ) ;
433      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
434      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
435      Also modify printing of summary:
436       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
437       b) echo the list of tested variables in the individual summary.txt of
438          each experiment.
439    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
440      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
441      (but still depend on the tile decompostion of the domain).
442    o pkg/seaice: change a discretization detail to make the B-grid code
443      "more symmetric". This change is likely to remove all "ridges/leads" that
444      where quasi-aligned with the grid in B-grid solutions. It may also be
445      the solution to the stress coupling issues with the B-grid.
446    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
447      remove .cvsignore from input dir. (since testreport no longer run here).
448    o pkg/thsice:
449     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
450     - fix reshaping of sea-ice just after advection:
451       melt all the ice only if ice-volume is too small.
452     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
453       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
454     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
455    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
456      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
457    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
458      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
459      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
460      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
461      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
462      -> update output.txt
463    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
464     this affects truncation error: -> update output.txt of exp:
465      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
466      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
467    
468    checkpoint59f
469    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
470    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
471      a bounded range (in forward mode)
472    o pkg/ecco, ctrl, autodiff and mom_common:
473     internal parameter controls, completements of implementations
474    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
475    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
476      (not seem any difference in testing results).
477    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
478       at face corners.
479    o pkg/generic_advdiff:
480     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
481      loop range indices for computing vertical advection tendency
482      and do the calculation in the interior only (no overlap) ;
483      for now, only implemented for SOM advection (to save CPU time).
484     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
485    o exch2 adjoint
486      First set of changes:
487      - add exch2 hand-written adjoint templates
488      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
489        This will require cleanup in pkg/autodiff/*.F
490        (changed routines currently kept separate in verif. code/)
491      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
492        that used to hide exch2 or cubed-sphere specific code
493        (commented via 'cph-exch2')
494    o pkg/seaice
495      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
496    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
497       output of global_ocean.cs32x15.thsice .
498    
499    checkpoint59e
500    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
501      for B-grid vector (not yet tested) and C-grid vector (<- only used
502      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
503    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
504      (#ifdef ALLOW_SALT_PLUME)
505    o gather_2d/scatter_2d: removed halo regions
506    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
507      scheme and the corresponding test case (under front_relax dir). For now,
508      only available with Skew-flux form and not yet tested in realistic set-up.
509      adjoint: store directives updated, but gradient checks deteriorated,
510      so maybe GM/Redi adjoint is now broken.
511    o seaice adjoint
512      * add AREA, HEFF, HSNOW as control variable
513        (should not change lab_sea results)
514      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
515    o pkg/seaice:
516      * added computation of saltFlux in seaice_growth;
517        For time being, sea ice salinity is assumed constant
518        contribution of snow flooding to freshening of sea ice is neglected.
519        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
520        defaults to 0.0 in order to maintain backward compatibility.
521        Typical values for SEAICE_salinity are 4 to 10 g/kg.
522      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
523      * added SEAICE_availHeatFrac, which specifies fraction of surface level
524        heat content used to melt or grow ice
525      * commented out cap of HICE: it helps keep ice thinner
526      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
527      * applied OBCS T/S mask to HEFFM sea ice mask
528    
529    checkpoint59d
530    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
531     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
532     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
533    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
534     and change default value of parameter "GM_Small_Number";
535     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
536       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
537       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
538    o pkg/ecco: cost function when applying pkg/smooth to controls
539    o pkg/ctrl: add forcingPrecond run time parameter
540    o pkg/seaice:
541     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
542     - fix bug in metric terms of u-equation in LSR solver (implicit part),
543       changes verification/lab_sea
544     - rearrange implicit part of u-equation in LSR solver to make it easier to
545       read, understand, and debug. This causes changes at the truncation level.
546     - fix (serious) bug in the boundary conditions (sign error in the implicit
547       part) of the LSR solver. Changes all LSR results.
548     - fixed problem with HSNOW initialization to avoid thick snow when AREA
549       is initilized with small values - does not change lab_sea results.
550     - added HsnowFile initialization capability
551    o pkg/smooth: addition to model/src and pkg/ctrl so allow
552     initialization of pkg/smooth and application to control vector
553    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
554    o dependencies: pkg/profiles requires pkg/cal
555    o pkg/profiles:
556     - added option ALLOW_PROFILES_GENERICGRID
557         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
558         that interpolation information (grid points and coefficients) is provided
559         within the netcdf input files.
560         -> sample matlab scripts can be found in MITgcm_contrib/gael
561         that allow you to prepare netcdf input files.
562     - also modified: cleaner include statements, cleaner error print statements,
563       cleaner stops when error, and more tests of the netcdf input files consistency.
564    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
565    o pkg/seaice:
566     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
567       requires a new routine: seaice_diagnostics_fill.F
568     - make sure that seaice does not move if not forced (pressure replacement
569       method, Hibler and Ip, 1995), changes results
570     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
571     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
572       It is turned off by default (=-1.), because it changes the results.
573     - make it possible to read AREA from a file, too.
574    
575    checkpoint59c
576    o add S/R and diagnostics for oceanic mixed-layer depth
577    o move GMRedi call after all vertical mixing schemes (including KPP)
578    o pkg/thsice:
579     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
580      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
581    o pkg/obcs:
582     - bug fix for balance code
583    o pkg/seaice:
584      - allow values of SEAICE_elasticParm > 1
585      - add new parameter SEAICE_evpTauRelax as an alternative
586        to SEAICE_elasticParm
587      - make lsr boundary conditions free slip (by default), changes result
588      - add code for no slip boundary conditions for lsr
589      - set minimum of zeta to zero (and not 4e8) (changes results)
590      - add a cap on AREA after advecting AREA if seaice_growth is not called
591    o change calculation of Visbeck K:
592      - no longer depend on tapering scheme; instead, compute slope (limited
593        by GM_maxSlope). this is equivalent to what was comuted before with
594        clipping or linear tappering.
595      - fix vertical averaging (wrong by 1/2 level)
596      - leave the old version (but will not be maintained) within
597        #ifdef OLD_VISBECK_CALC / #endif
598      - update output of exp. ideal_2D_oce
599    o change error catch in calc_r_star to improve vectorization
600    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
601      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
602    o adjoint:
603      Re-organized adjoint checkpointing according to Matt Mazloff
604      (but with modifs/completions/cleanups)
605      Storing is now bundled into large arrays to optimized I/O
606      (and second step in cleanup of the_main_loop)
607    
608    checkpoint59b
609    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
610      - export/import (between ocean & coupler) fields needed for ocean DIC.
611    o pkg/seaice:
612      - get rid of three more exchanges seaice_calc_viscosities (required
613        different loop boundaries in seaice_lsr and seaice_ocean_stress)
614      - bug fix in seaice_ocean_stress (update of lab_sea required)
615      - reduce loop boundaries to necessary minimum also in seaice_evp
616      - go back to the old way of computing deltaC/Z as the adjoint likes that
617        better
618    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
619      passive tracer to an Age Tracer) + update output.txt
620    o pkg/exf:
621      - implement A-grid / C-grid selection for wind-stress input files.
622      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
623      for now, in exf_bulk_largeyeager04.F only :
624      - change implementation for case where windspeed + 2. components wind-stress
625        are read-in. AND use rhoConstFresh to convert evap.
626    o pkg/seaice:
627      - use correct EXCH_UV for wind-forcing (on A-grid).
628      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
629        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
630    o pkg/exf:
631      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
632      EXF_INTERPOLATION:
633      - merge global_with_exf/code version of exf_interp_read.F
634        to the main code ;
635      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
636        reading the file ; Important: This options needs to be defined to recover
637        previous code.
638        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
639      - no longer loose real*8 precision along the way when using exf_iprec=64.
640    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
641      - change discretisation of evp-solver in order to avoid another exchange
642        (changes lab_sea) and clean up a little
643      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
644        help the adjoint (this also changes the results slightly)
645      - add a few "_d 0" where they had been missing in seaice_evp.F
646      - cleaning up: remove unused seaice_calc_rhs.F
647    o pkg/exf: some cleaning-up:
648      - change various "constants" into runtime parameters
649      - cleaned-up Large&Yeager04 routine which should eventually
650        replace exf_bulkformulae.F (changed names of S/R and CPP)
651        and merged various ALLOW_ATM_WIND options
652     only used with thsice pkg (in thsice_get_exf.F):
653      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
654        which are used when useStabilityFct_overIce=TRUE (= the default)
655      - change default values of ice & snow emissivity and scale downward LW
656        by ice & snow emissivity.
657    o pkg/thsice:
658     fix few little problems, in thsice_calc_thickn.F:
659      - growth vertically (and not laterally) if iceFrac == iceMaskMax
660      - melt only laterally if hIce < hThinIce (as the comments say)
661      and in thsice_extend.F:
662      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
663      - start to form ice as soon as the minimum ice-volume is reachable.
664     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
665      and cpl_aim+ocn
666    o pkg/kpp
667     - move computation of surface related input fields to KPP into a new
668       subroutine kpp_forcing_surf.F
669     - remove wrong (within bi,bj loops) EXCH calls.
670     - little cleaning (add argument myThid in last position, cvs header ...)
671     - for now, fix conservation problem by exchanging KPPviscAz (may not
672       be the best fix)
673    o pkg/seaice
674     - check for inconsistent evp parameter/cpp-flag combination
675     - remove leftover errIO flat for obsolete name list error handling
676    o OpenAD
677     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
678    
679    checkpoint59a
680    o pkg/seaice: some parameter clarifications and a little bit of clean up
681    o pkg/thsice: rename run-time parameters:
682       himin       -> hIceMin
683       himin0      -> hThinIce
684       hihig       -> hThickIce
685       i0          -> i0swFrac
686       transCoef   -> bMeltCoef
687       frac_energy -> fracMelting
688      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
689       with default values (for now) that do not change the results.
690      remove old version of thsice vars advection in pkg/seaice.
691    o in FFIELDS.h:
692      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
693      - make pLoad & sIceLoad always available (but still only used if
694         ATMOSPHERIC_LOADING is #define).
695    o pkg/kpp: replaced _KPP_RL with _RL
696    o bug fixes for vertical diffusivity computations when both KPP and
697        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
698        are no longer updating the vertical diffusivity array
699        (passed as argument) but are (re-) setting those arrays.
700    o pkg/seaice: fix bug in evp solver, while doing that
701      - change (improve?) discretization of stress computations for both
702        cgrid-lsr and evp solver
703      - add a new routine to compute strain rates
704      - the above changes lab_sea results
705      - add no slip conditions for evp solver (off by default), lsr-version
706        may follow
707      - fix exchange for shear at Z-points (does not change lab_sea)
708      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
709        (to force the user to pick a time step since there is not "safe" way
710        of choosing it)
711      - add principal stress diagnostics
712      - rearrange fields for evp a little to avoid having to call a: too many
713        exchanges and b: exchanges for stress trensor components which we do
714        not have.
715      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
716        of evp, complete rewrite for lsr case (latter is does not yet work
717        in all cases)
718    o pkg/kpp: add code to have mixing in shelf ice caverns
719      - add myThid to all kpp routines (long overdue)
720    
721    checkpoint59
722    o pkg/exf:
723      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
724        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
725      - move exf header files from lower_case.h to UPPER_CASE.h ;
726        add missing cvs Header & Name
727      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
728      - add namelist param. selectStressGridPosition, exf_monFreq
729      - retire many _CLIM routines, and remove data.exf_clim
730        + params moved to data.exf
731        + climsst, climsss now handled by exf_set_gen, i.e.
732          climss?period=0 refers to constant field,
733          climss?period=-12 to monthly forcing
734      - split up namelists in data.exf
735    o pkg/seaice:
736      - remove seaice_exch and seaice_exch_uv
737      - remove superfluous exchange of theta
738      - add myThid to seaice_budget_ocean/ice
739      - add new interface for atmospheric wind forcing (C-grid only)
740        + new routine
741        + two new field (taux, tauy for stress over ice)
742        + removed one global field (DAIRN) for C-grid case only
743    o pkg/thsise
744      - 2nd set of modifs for thsice adjoint in conjunction with exf
745    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
746    
747    checkpoint58y_post
748    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
749      vertical diffusivity, similar to that in MOM4; turned on using
750      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
751      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
752    o Added capability for 3D specification of background vertical diffusion
753      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
754      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
755      "data" file that contains the 3D vertical diffusivity coefficients.
756    o ice dynamics (pkg/seaice) with thsice thermodynamics:
757      - add code within pkg thsice to advect & diffuse sea-ice fields
758      similar to (and will replace) what has been added in  seaice_advdiff.F,
759      but: - conserving Mass, Heat & Salt.
760           - better when using non-linear advection scheme (not yet fully tested)
761           - can also be used in atmospheric set-up (for now, only the diffusion).
762    
763    checkpoint58x_post
764    o IO option for global-file compact format:
765      - add options when generating topology (utils/exch2/matlab-topology-generator)
766      - add I/O capability (pkg/mdsio).
767      - adapt utils/matlab/rdmds.m to read this format.
768      for now long-line format not yet supported by pkg/mdsio (& exch2).
769    o shelfice: add a few diagnostics
770    
771    checkpoint58w_post
772    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
773      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
774      (and replace horiVertRatio in NH code).
775      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
776                         and tutorial_plume_on_slope (sensitive to truncation)
777    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
778      directly to drive seaice model (C-grid only)
779    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
780     - reintroduce computation of wind from stress,
781     - compute tau (in exf_bulkformulae.F) from windstress averaged to
782       mass points to avoid tau = 0
783     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
784    o rdmnc.m: make it work with "global" files created with gluemnc
785    o rdmnc.m : some improvements in dealing with singleton dimension
786      (tested on all testreport mnc output files).
787    o genmake2: disable pkg/profiles if netcdf test fails.
788    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
789    o move call to cal_readparms up to make calendar parameters/variable available
790      to all packages
791    
792    checkpoint58v_post
793    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
794      useDynP_inEos_Zc tested.
795    o pkg/exf: changes to properly interpolate/mask/scale initial fields
796    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
797      and portions thereof.  See read_cs.txt for description and examples.
798    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
799      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
800      following the great-circle arc between those 2 points.
801    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
802      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
803    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
804     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
805     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
806     - still needs work (not working with some options ; efficiency to improve)
807       and serious testing.
808     - use this scheme for temperature & salinity in 2 advection test exp.:
809       advect_xy & advect_xz, respectively.
810    
811    checkpoint58u_post
812    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
813    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
814    o testreport: add option "-skipdir" to skip some test.
815    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
816      momentum calculation.
817    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
818    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
819      remove checkpoint.F and the_correction_step.F (no longer used);
820      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
821    o add option (linFSConserveTr) to correct for tracer source/sink due to
822      Linear Free surface
823    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
824    o pkg/thsice: fix reading mnc-pickups
825    
826    checkpoint58t_post
827    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
828    o pkg/mdsio:
829     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
830       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
831       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
832     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
833     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
834       either MDS_READ_FIELD or MDS_WRITE_FIELD )
835     - new S/R (to replace MDSWRITEMETA), which allows to write more
836       informations (variable names, time ...) to meta files.
837     - modify rdmds.m to give back the meta file content.
838    o pkg/diagnostics: change vertical interpolation to be safer, and more
839       flexible (define p-levels to interpolate to in data.diagnostics);
840      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
841       diagnostic pointer.
842    o pkg/seaice: more cleaning up of seaice_growth, added many comments
843    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
844    o fix multi-category seaice:
845     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
846       SEAICE_MULTICATEGORY
847     - fix short wave heat flux
848    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
849       and allow to use EVP solver. Change forward lab_sea: test both EVP
850       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
851    o Initial check-in of lab_sea adjoint
852      (very similar to natl_box_adjoint/code_seaice)
853      * used C-grid and EVP solver
854      * used KPP, GM/Redi
855      * uses inAdExact=.TRUE.
856      * gradient checks fail for both ADM and TLM
857        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
858        f.d. gradients actually seem more problematic than ADM, TLM gradients;
859        issue is related to forward mismatch between g77 an ifort
860    o pkg/seaice: overhaul of thermodynamics
861     - growth.F and groatb.F are replaced by new routine seaice_growth.F
862     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
863     - move a few global fields out of SEAICE.h into seaice_growth.F and
864       make them 2D (FICE/QNETO/ ...)
865     - remove FO (it is the same as QNETO)
866     - introduce a few local fields to avoid modifying external fields such
867       as atemp, etc.
868    
869    checkpoint58s_post
870    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
871      changed exf_set_gen.F so that
872        genperiod=0 means input file is one time-constant field and
873        genperiod=-12 means input file contains 12 monthly means
874    o CG2D: use pre-computed solver main-diagonal (stored in common block);
875      this affects truncation error ; generate new output file for exp. which
876      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
877        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
878        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
879        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
880        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
881        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
882    o start implementation of deep-atmosphere and anelastic formulation
883    o verification: remove 2nd copy of input files and use script "prepare_run"
884      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
885    o mom_common/vecinv/fluxform: fix a few initialisation isssues
886    o profiles: fix for multithreaded case
887    
888    o diagnostics: rename few diags:
889      s/'PRESSURE'/'RCENTER '/g
890      s/'TICE    '/'oceFreez'/g
891      s/'TAUX    '/'oceTAUX '/g
892      s/'TAUY    '/'oceTAUY '/g
893      s/'SWFLUX  '/'oceQsw  '/g
894      s/DIFx/DFxE/g
895      s/DIFy/DFyE/g
896      and add few ocean-forcing diagnostics:
897      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
898    o modifications to pkg/seaice/growth.F and budget.F, which change results of
899      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
900      as actual snow thickness.  It now refers everywhere to effective snow
901      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
902    
903    checkpoint58r_post
904    o modifications to pkg/seaice/growth.F, which change results of
905      lab_sea experiment: fixes pertain to melting snow over open water, to
906      masking EVAP under sea ice, and to using the correct AREA variable for
907      computations of EVAP, PRECIP, HSNOW, and GHEFF
908    o add ability to read bathy, salt, and theta using MNC (off by def)
909    o add flooding algorithm and advection of HSNOW for pkg/seaice;
910      both are turned off by default and do no change any results
911    o seaice advection with pkg/thsice: a step toward the use of non-linear
912      advection scheme, but #ifdef or commented out for now (requires more EXCH).
913    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
914      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
915      in natl_box (affects results @ truncation level: update output.txt)
916    o multi-threading and IO:
917      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
918      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
919        (needed to work with SingleCpuIO): tested in all verif. exp.
920    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
921      affects the results (but none of the verification test uses this scheme).
922    o Adding some pkg/diagnostics capability to pkg/seaice
923      (will certainly be subject to changes)
924    o ctrl: adding new control variables:
925      lwflux, lwdown, evap, snowprecip, apressure, runoff
926    
927    checkpoint58q_post
928    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
929      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
930      high_res_cube configuration by 4% on Columbia.
931    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
932      add (in global_with_exf/code) a version of EXF_INTERP_READ without
933      dynamical allocation (seems to work in multi-threaded).
934    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
935      single CPU io) so that TAF does not have to see EESUPPORT.h
936    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
937    
938    checkpoint58p_post
939    o obcs: stop if obcs is used with useCDscheme = .true.
940    o shelfice:
941     - fix a sign error so that no slip at shelfice interface works
942     - remove stop for combination non-hydrostatic code and shelfice. That does
943       not mean, that the results are correct, but at least they are numerically
944       stable
945    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
946    o added adjoint exch routined for all exch*3d* routines
947      and updated flow directives
948    
949    checkpoint58o_post
950    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
951      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
952    o change controling S/R for writing pickup file (new S/R do_write_pickup)
953      and clean-up reading/writing of pickup files.
954    o fix local version of read/write pickup (NH part) in rotating_tank/code
955    o simplify EXCH interface:
956     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
957     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
958    o added the regrid package
959    o shelfice:
960     - add a simple boundary layer scheme to reduce noise
961     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
962    
963    checkpoint58n_post
964    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
965       local variable (not in common block).
966    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
967      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
968      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
969        to work with SingleCpuIO.
970    o add "_d 0" to real constant of pkg/cfc subroutines ;
971       update exp. cfc_exemple & tutorial_cfc_offline output files.
972    o multi-threading and IO:
973      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
974        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
975      - barrier before and after reading.
976      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
977      - avoid using MDS_WRITELOCAL for LAND pkg output.
978      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
979        common-block variables ; Allows multi-threading with master-thread IO.
980    o change default MAX_NO_THREADS from 32 to 4 ;
981      and stop cleanly when MAX_NO_THREADS is too small.
982    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
983    
984    checkpoint58m_post
985    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
986       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
987    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
988       keep global_ocean.90x40x15 (for AD testing) with former secondary test
989       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
990    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
991        add MITgcm_tutorials (= code + all the tutorials)
992    o ecco, option to compute cost for total ssh (mean+anom)
993    o consistent with addition of ptracer and ssh in pkg/profiles
994    o profiles: adding ptracer and ssh
995    o testreport: change multi-test output-file name
996      (from output.txt.{name} to output.{name}.txt)
997    o profiles: now ok for mutli-tiles case
998    o seaice: add 4 parameters for different advection schemes for area,
999      (effective) seaice thickness, enthalphy, and snow height. Their default
1000      is the standard parameter SEAICEadvScheme
1001    o calc_gw:
1002     - add cosFacU in zonal viscous flux (harmonic.visc.).
1003     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
1004       of tutorial_plume_on_slope.
1005    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
1006    o calc_gw: true flux-form, account for horizontal grid spacing.
1007      update rotating_tank results, but not plume_on_slope (affected at
1008      truncation level, 11 digits).
1009    
1010    checkpoint58l_post
1011    o calc_gw:
1012     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
1013     - remove side-drag for now (need to fix it); update plume_on_slope results.
1014     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
1015    o commit code to make SST/SSS weights spatially variable
1016      (based on either variable in-situ or variable initial T/S weights)
1017    o pkg/ecco:
1018      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
1019        now based on horizontally varying weights wthetaLev, wsaltLev
1020      * cost_averagesflags now returns year indices in addition to day, month
1021      * sflux balance is performed on annual basis
1022        (sflxumm, sfluxmm2, bal_sfluxmm)
1023      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
1024        including separate counting and multipliers
1025    o pkg/rbcs
1026      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
1027    
1028    checkpoint58k_post
1029    o testreport:
1030     - always build in dir. "build" (if not there, mkdir build instead of building
1031       & running in input)
1032     - run in dir run (if it exists), in build otherwise.
1033     - call prepare_run (if input/prepare_run exists)
1034     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
1035    o pkg/exf modifications to interpolation and rotation routines for more
1036       reasonable treatment of North Pole singularity: for tracers North Pole
1037       value is set to northernmost zonal-mean value, for zonal velocity it is
1038       set to zero, and for meridional velocity it is set to northernmost value.
1039    o pkg/exf/exf_check_range.F
1040     - add tile index to diagnostics and move stop statement to the very
1041       end of the routine.
1042    o pkg/diagnostics: (diagnostics_main_init.F)
1043      define title of isomorphic variables according to the current config.
1044    o pkg/thsice with pkg/seaice dynamics:
1045    - fix domain of computation (interior only, required for exf) and do exchanges
1046    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
1047    o towards a standard way of dealing with multi-threading in MONITOR
1048      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
1049    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
1050       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
1051    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
1052    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
1053    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
1054       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
1055    o tracer advection:
1056     - clean-up and simplify calc_common_factors.F
1057     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
1058       advection subroutine (but still not used within DST advection S/R)
1059    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
1060    
1061    checkpoint58j_post
1062    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
1063      from file (collects calls previously in FORWARD_STEP)
1064    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
1065    o adjoint store dir. adjusted accordingly
1066    o genmake2
1067      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
1068    
1069    checkpoint58i_post
1070    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
1071      on wind stress (SEAICEstressFactor defaults to 1.)
1072    o Total number of Timers is finite (<=40): comment out 2 non-essential one
1073      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
1074    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
1075      on CS-grid: no longer loosing mass.
1076    o exf & curvilinear-grid: no longer modify longitude xC & xG.
1077    o pkg/ggl90: fix sloppy output and fix a bug
1078    o pkg/seaice: added SEAICEuseEVPpickup parameter
1079      - Set to false in order to start EVP solver with
1080        non-EVP pickup files when using SEAICEuseEVP
1081      - fix sign error in diffusion in seaice_calc_rhs
1082    
1083    checkpoint58h_post
1084    * Modifications for bottom topography control
1085      o replace hFacC by _hFacC at various places
1086      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
1087      o add non-self-adjoint cg2d_nsa
1088      o update autodiff support routines
1089      o re-initialise hfac after ctrl_depth_ini
1090      o works for 5x5 box, doesnt work for global_ocean.90x40x15
1091    * Adding verification for 5x5 box (4-layer) bottom topography control
1092    
1093    checkpoint58g_post
1094    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
1095       used for mean seasonal cycle, mean diurnal cycle); add an example
1096       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
1097    o pkg/ggl90:
1098      - add parameter (minimum surface kinetic energy)
1099      - fix bug (avoiding division by zero)
1100    o couple pkg/thsice to pkg/seaice:
1101      - modify advection in seaice to accomodate new scalar fields to be advected
1102      - only muliDimAdection scheme work with seaice/thsice
1103      - mapping of thsice-variables to seaice-variables, back and forth
1104      - does not break the verification experiments, but does not give the
1105        desired results either
1106    o pkg/seaice
1107      - make (default) second order advection a bit less confusing?
1108    
1109    checkpoint58f_post
1110    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
1111      to pkg/seaice):
1112      - new routines thsice_map_exf and thsice_get_exf provide the interface
1113      - add an additional formal parameter to thsice_solve4temp
1114    o pkg/exf:
1115      - add new fields wspeed, snowprecip (to be able to couple to thsice)
1116      - correct Stefan-Boltzmann constant
1117      - new parameter for longwave surface emittance
1118      - separate some stuff from exf_bulkformulae into new routines  
1119        exf_radiation, exf_wind
1120      - add new parameters and constants: longwave emissivity for ocean, ice
1121        and snow, evaporation parameters over ice
1122      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
1123        either wind from stress or stress from wind
1124    o pkg/thSIce:
1125    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
1126    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
1127       and THSICE_CALC_THICKN
1128    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
1129    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
1130      to make debugging easier.
1131    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
1132    o pkg/bulk_force:
1133      - clean-up comments and parameters ;
1134      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
1135    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
1136      generate new output for test-experiment: aim.5l_cs.thSI
1137    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
1138      testreport accordingly
1139    
1140    checkpoint58e_post
1141    o SEAICE_CGRID adjoint done
1142    o R_STAR adjoint implemented.
1143      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
1144      * need to sort out init. of h0facc, etc.
1145    o Make pkg/profile fully independent of ecco,cost, etc. stuff
1146      to be able to use it in pure forward.
1147    
1148    checkpoint58d_post
1149    o upgrade simple test-experiment to tutorial example:
1150     step.1: duplicate the experiment and (step.2) will remove the old copy.
1151      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
1152      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
1153      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
1154      tutorial_global_oce_biogeo    <- copy of dic_example
1155      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1156      tutorial_plume_on_slope       <- copy of plume_on_slope
1157      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1158      tutorial_global_oce_optim     <- empty for now (David ?)
1159      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1160     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1161    o correct a sign problem in cost_scat.F
1162    o obcs and ptracers: fix boundary conditions for advections schemes
1163      with larger stencil
1164    o thsice adjoint: start
1165    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1166      completeness
1167    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1168      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1169    o ptracers adjoint:
1170      * avoid extensive recomputatations
1171      * fix missing re-init. of gptr (missed by TAF)
1172    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1173      me to turn off the excessive output to STDOUT that this package produces
1174    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1175      and add those terms in Vector-Invariant formulation.
1176    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1177      if the control period (xx_hfluxperiod etc) is 0
1178    o in profiles pkg, clean routines and fix details
1179    o in ecco pkg, reading ssh data:
1180      fix problem in case the model does not start at iter0=0
1181    o fix mnc-pickup/restart for ptracers
1182    o new package prifiles:
1183      code to compute profile-based cost by Gael Forget
1184      (modifs in ecco, ctrl, autodiff)
1185    o Benign bug fix in initialization (spotted by M. Mazloff) of
1186      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1187    
1188    checkpoint58c_post
1189    o adjoint: finish NLFS adjoint and provide reference output in
1190      verification/global_ocean.90x40x15/results_ad_nlfs
1191    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1192      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1193      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1194      with SEAICE_CGRID defined.
1195    o move calendarDumps from "data" to "data.cal" and clean-up the code
1196      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1197    o add useEXF & useCAL flags (for now, set in hard-coded way)
1198    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1199      (were missing in NH mode, and wrong in quasihydrostatic mode).
1200      waiting for Chris updated version of calc_gw to add those CALLs.
1201    o fix bug in quasihydrostatic S/R ;
1202      add a test for this option: global_ocean.90x40x15.qshyd
1203    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1204      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1205    o add on/off flag useOffLine for package OFFLINE
1206    o seaice:
1207      - modify advection so that it works also on the C-grid
1208      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1209        problem in multi-tile runs with C-grid
1210      - add flags for clipping ice velocities and/or masking solver forcing
1211      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1212        C-grid solver
1213      - added a few comments to seaice_diffusion.F
1214      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1215        are now exclusive)
1216      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1217        required re-ordering the code a little:
1218       + make DAIRN global variable (defined in SEAICE)
1219       + move computation of the viscosities eta and zeta into a new separate
1220         routine (because I need to recompute them in seaice_ocean_stress.F)
1221    
1222    checkpoint58b_post
1223    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1224      update output.txt of exp. aim.5l_cs.thSI
1225    o various mnc cleanups and improvements:
1226      + shrink lookup tables by factor of ~4
1227      + better error reporting when running out of lookup space
1228      + able to handle longer path/file names (up to 500 chars)
1229    o adjoint:
1230      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1231      - TBD: "hidden" mom_vecinv recomp. in dynamics
1232    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1233     (allow to differentiate between forcing components using new integer flags:
1234      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1235     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1236    o ecco
1237      - enable trend removal from SSH anomaly obs.
1238    o adjoint
1239      - a fix for PmEpR when #undef EXACT_CONSERV
1240      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1241      - try to fix "hidden" recomp. in forward_step for NLFS
1242        (NLFS seems broken sometimes after I checked it in)
1243    o seaice:
1244     - add c-grid version of the dynamic solver:
1245       + three new routines that are the c-grid substitute lsr, dynsolver
1246         and ostres
1247       + put a few fields that were local to dynsolver into global common
1248         blocks, so that I can move the computation of stresses etc into
1249         seaice_lsr (saves coding but may break the adjoint).
1250     - replace more hardwired parameters by runtime parameters
1251     - add ice masks that mask the rhs of the implicit solvers where there
1252       is no ice (commented out in seaice_dynsolver, because i am not sure
1253       if this works properly), eventually this should replace the clipping
1254       of ice velocities in seaice_dynsolver to +/-40cm/s.
1255    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1256      include it only where its needed
1257    o move balancing of fluxes before the call of external_forcing_surf
1258    o seaice:
1259      - correct units of turning angles (now they are really in degrees)
1260      - move computation of GWATX/Y out of main routine into dynsolver
1261      - initialize GWATX/Y in seaice_init
1262    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1263      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1264    o seaice: add runtime flags for turning angles (default to zero)
1265    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1266      and trend from exf forcing and ctrl control adjustments
1267    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1268      (since checkpoint57x_post)
1269    o change the default rotation period to 86164.s = the Earth rotation
1270    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1271      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1272    o seaice advection: add code for choosing between the default (2nd order
1273      central differences) and multiDim advection schemes provided by
1274      pkg/generic_advdiff
1275    o seaice:
1276      - removed all references to SEAICE_GRID.h fields from
1277        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1278        (cubed-sphere configuration will change a little)
1279      - grid computations in seaice_init are obsolete now.
1280      - cleaned up code a little so that is easier to read (hopefully).
1281      - added new (better?) discretizations of default advection and diffusion
1282        (turn on with SEAICEuseFluxForm)
1283      - replace 1 in 3d global fields by kSurface in growth.F
1284      
1285    checkpoint58a_post
1286    o seaice:
1287      - bug fix in advect.F
1288    o shelfice:
1289      - separate shelfice load anomaly from pload (breaks with time
1290        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1291        Its default is 0., but it may be computed more cleverly from (unknown)
1292        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1293        done offline. A good approximation of the pressure load anomaly is
1294        necessary to avoid large initial adjustment processes underneath
1295        deep-reaching shelfice.
1296      - small fix in ISOMIP shelfice_thermodynamics
1297      - add more sophisticated thermodynamics of Hellmer (1989), this is
1298        now the default
1299      - give a few constants more intuitive names
1300    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1301      if bulk formulae are used in long integration (especially EmPmR). Turn
1302      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1303      if balancePrintMean, the imbalance that is substracted is printed to
1304      STDOUT.
1305    o fix bug (typo) in obcs_apply_eta.F
1306    o add a new package shelfice which enables us to model the circulation
1307      underneath shelf-ice with draughts of hundreds of meters.
1308     - works
1309     - to do: + include improved thermodynamics
1310              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1311                instead of new field kTopC
1312              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1313                instead of new field R_shelfIce and new code in ini_depth.F
1314                and ini_mask_etc.F?
1315              + adjust vertical mixing schemes?
1316    o seaice pkg:
1317     - add a cpp-flag to include a simple formula for a salinity dependent
1318       freezing point of sea water at the surface
1319     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1320       meridional stresses are now different (and hopefully correct)
1321    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1322       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1323       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1324    o pkg/diagnostics: add options and parameters for regional-statistics
1325       diagnostics ; define regions by reading a region-mask from a file
1326       (might add other options later)
1327    o pkg/bulk_force:
1328     - add option and parameters to use AIM surface-flux formulae.
1329     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1330       others forcing fields (defined in PARM05, parameter file "data") are loaded
1331       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1332     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1333     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1334     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1335       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1336     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1337    
1338    checkpoint58
1339    o add "--embed-source" option to genmake2 which, when the supporting
1340      tools can be compiled (as determined by genmake2) will turn on the
1341      embed_files package which then embeds the entire MITgcm source code
1342      (*.[fFhc] + Makefile) used for the build within the executable
1343      - requested by CNH but off by default
1344      - adds a paltry <9MB to the mitgcmuv executable in most cases
1345      - only writes the output when useEMBEDSRC in eedata is true
1346    o clean up 3-dim. relaxation codes:
1347      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1348      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1349      * Thanks to Tom Haine for testing!
1350    
1351    checkpoint57z_post
1352    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1353      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1354    o fix the pickup behavior for obcs in combination with ptracers
1355    o fix a bug in ptracers_external_fields_load
1356    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1357      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1358    o transfered surface NH pressure to eta field (if exactConserv).
1359    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1360         and update lab_sea output.txt file.
1361    o completing 3-dim. relaxation code: additional term
1362         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1363      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1364      * At compile time, in "EXF_OPTIONS.h" set
1365          #define  ALLOW_CLIMTEMP_RELAXATION
1366          #define  ALLOW_CLIMSALT_RELAXATION
1367      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1368          tauThetaClimRelax3Dim = 15552000.0,
1369          tauSaltClimRelax3Dim  = 15552000.0,
1370      * 3 cases:
1371          1) Use a constant-in-time 3-dim. field
1372          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1373          3) Real-time relax. to time-evolving prescribed field
1374    o Adding Laplacian-type smoothness constraint on
1375      initial and boundary (forcing) controls (ic, bc)
1376      * enable at compile-time via
1377        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1378      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1379      * Absolute scale somewhat unclear so far
1380      * no area weighting was included since no other cost term does so far
1381    
1382    checkpoint57y_post
1383    First step for a NLFS adjoint
1384    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1385    o new init. routines for calc_r_star, calc_surf_dr
1386    o still need to deal with ini_masks_etc
1387    o testreport seemed happy
1388    checkpoint57y_pre
1389    
1390    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1391    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1392    o add new offset feature to offline pkg (plus minor cleanup)
1393    o cfc fixes for final year of integration
1394    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1395      be in GCHEM_OPTIONS).
1396    
1397    checkpoint57x_post
1398    o fix testreport Pb in multiple test experiment.
1399    o cleanup our namelist syntax in verification:
1400      - make it more F95 standards compliant (some work still needed)
1401      - allows the vast majority of our tests to work with gfortran
1402    o Non-Hydrostatic:
1403     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1404     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1405    o Allow to apply AB on T,S rather than on AB(gT,gS):
1406     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1407     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1408       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1409     - need a "clever" read_pickup to restart from the other AB formulation
1410    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1411    o remove some unused variables (reduces number of compiler warnings)
1412    o adjoint
1413      * Disable useVariableViscosity for adjoint for time being
1414        (there are a number of extensive recomputations)
1415      * Initialize certain variables needed for adjoint
1416    
1417    checkpoint57w_post
1418    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1419                 fix the singleCpuIO RS version of MDSWRITEFIELD
1420       and add a WARNING if using globalFiles=T with multi-processors.
1421    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1422      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1423    o tracer advection scheme:
1424      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1425       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1426       was not very convenient).
1427      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1428       (further tests needed for the implicit DST & Flux-Limiter schemes).
1429    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1430      and sRef for convenience, handy, when you want to initialize
1431      ptracers in a large domain with a constant non-zero value. Also,
1432      untangle ptracers_init.F a little.
1433    
1434    checkpoint57v_post
1435    o change dome exp. to use variable viscosity in side-drag terms.
1436    o remove all the files from the cfc_offline test since they are now
1437      incorporated into tutorial_cfc_offline which has been producing
1438      identical results for a few days of testing
1439    o add new parameter: sideDragFactor to enable half-slip-side BC
1440      and change side-drag S/R to use viscosity from mom_calc_visc
1441      (can switch back by setting sideDragFactor=0.); affects results at
1442      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1443       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1444    o vorticity & strain are now computed without masking, to account for
1445      no-slip-side BC in variable viscosity calculation ; mask is applied
1446      anyway later on, before computing advection/coriolis terms.
1447    o modify exp4 to test new obcs support for reading from external files
1448      and for passive tracers
1449    o fix behavior of ptracers_monitor when monitor output is written to a
1450      netcdf-file; still not independent of monitor.F (writes in the same
1451      file).
1452    o change default value of tRef (put a uniform, meaningful value for ocean
1453      & atmos) and initialize sRef (was missing, as Martin mentioned).
1454    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1455      to be proportional to enstrophy dissipation length.  Thus,
1456       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1457      This is now consistent with Smagorinsky and with the manual.
1458    
1459    checkpoint57u_post
1460    o OBCS and PTRACERS: add open boundary support for passive tracers
1461      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1462        OB-values from file; this is not different from the way theta and salinity
1463        are treated
1464      - however, Orlanski-radiation conditions are not supported, and the model
1465        will stop if you use pTracers and Orlanski at the same time.
1466      - beefed up the rountine obcs_external_fields_load: now only those open
1467        boundary values are overwritten with values from files for which there
1468        are really files, otherwise the OB-fields remain untouched. This makes
1469        it possible to use different OBs at different ends of the domain (as
1470        with EXF)
1471    o reduce number of exch calls in shap_filt (s2).
1472    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1473      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1474    
1475    checkpoint57t_post
1476    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1477    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1478      same truncation, independent of the face number: affects affects several
1479      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1480    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1481      note that biharmonic viscosity + no-slip was not tested in any experiment.
1482    o fix bug in non-linear free-surf side-drag ; generate new output for
1483      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1484    o make mnc honor the writeBinaryPrec flag for most kinds of output
1485    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1486    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1487      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1488    o add brackets in multi-terms sum to get same truncation, independent of
1489      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1490      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1491    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1492      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1493      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1494      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1495      Suggested values of viscosity parameters found in mom_calc_visc.
1496      Many new viscosity diagnostics available.
1497    
1498    checkpoint57s_post
1499    o Add clearing-house for viscosity calculations, mom_calc_visc and
1500      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1501      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1502      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1503      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1504      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1505      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1506      ViscAhStrain and viscAhTension are now retired.
1507    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1508    o In response to JMC's bug report, genmake2 now ignores any soft-links
1509      that it finds in the *current* directory when searching for files.
1510      Soft-links found in any other source directories will still work as
1511      they did before.
1512    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1513      a C routine to unlimit the stack size
1514    o mnc-ify pkg/aim snapshot vars
1515    o mnc-ify pkg/land as requested by Daniel
1516    o various changes to mnc including:
1517      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1518      - output can now be grouped so that all files within a group
1519          change the ITER portion of their names in lock-step together
1520      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1521          and works with both EXCH1 and EXCH2 (but needs more testing)
1522      - writing works for all verification test cases w/ g77 on Linux
1523    
1524    checkpoint57r_post
1525    o make MNC variable initialization happen earlier
1526    o add diagnostics for (almost) each term of the momentum Eq.
1527    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1528    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1529    o remove MINIMAL_TAVE_OUTPUT option ;
1530      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1531    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1532      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1533    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1534    o add time-dependent SST, SSS control
1535    o cost terms in ecco/ modularized (new cost_generic.F)
1536    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1537    o new infrastructure for seaice model vs. obs misfits in seaice/
1538      * driver from the_main_loop.F is seaice_cost_driver.F
1539      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1540      * gradient check in Exp. 6a of natl_box_adjoint/
1541    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1542      (see README file)
1543    
1544    checkpoint57q_post
1545    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1546    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1547      - bug was reported by Jean-Michel and Ian Fenty
1548    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1549      update exp. cpl_aim+ocn output.
1550    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1551      Needed for high-res. runs with large global files
1552      to be able to limit tapelev size
1553    o Changed some tests for adjoint:
1554      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1555      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1556      * global_ocean.90x40x15/ back to default 3-level checkpointing
1557    o Modifications to enable scripted COMMON to MODULE conversion
1558      * verification/OpenAD/code/ has necessary scripts and description;
1559      * converts, compiles and runs successfully;
1560    
1561    checkpoint57p_post
1562    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1563    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1564      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1565    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1566    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1567      (was already the case for dissipation with mom_vecinv,
1568       and also the case for grad.PhiHyd when staggered-timeStep)
1569      This will allow to put dissipation out-off the AB time-stepping.
1570     Unfortunately, affects truncation error. Update output of exp. that "fails"
1571      (cg2d matching number) and leave the others for later: front_relax(10),
1572      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1573      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1574    
1575    checkpoint57o_post
1576    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1577      (2) its ready to be documented during the 20050801 DocFest
1578    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1579      for ideal_2D_oce and lab_sea on linux_ia32_g77
1580    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1581      in global1x1_tot/code_seaice_adj to access indices 32, 33
1582      (worth another tag)
1583    
1584    checkpoint57n_post
1585    o adding precip control xx_precip 32
1586    o adding swflux control xx_swflux 33
1587    o Replacing 10 forcing penalty cost routines by 1 generic.
1588    o Implementing partitioning in time-mean and variable adjustment
1589      for atmos. state.
1590    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1591    o in natl_box_adjoint:
1592      * updated exp 1 to 10
1593        (but does not have time-mean vs. variable split results yet)
1594    o updated global1x1/*_seaice_adj/
1595      to incorporate latest changes
1596    o enable useSingleCpuIO for mdsio vector routines
1597      (applies in particular to tapelev I/O)
1598    o removed inefficient K-loop in all active_file*control*.F
1599    
1600    checkpoint57m_post
1601    o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)
1602      and advect_cs (use EXCH-2 and standard cs-32 grid files).
1603    o pkg/exch2: filling of face-corner halo regions is optional
1604      (ifdef W2_FILL_NULL_REGIONS) and is turned off by default.
1605    
1606    checkpoint57l_post
1607     tag before updating tutorials (pre-release-2)
1608    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
1609       for output and interpolation of input fields onto model grid)
1610    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
1611       Affects results of exp. rotating_tank ; update output.txt.
1612    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
1613          and taking the square quantity and/or using a fraction-weight field.
1614    o fix aim_diagnostics_init.F mate numbers.
1615    o add mnc output capability to diagnostics/diagstat and update
1616      our cvsignore files for the ACSII output generated
1617    
1618    checkpoint57k_post
1619    o lab_sea now uses diagnostics package and provides a suite of
1620      new EXF diagnostics output.
1621    
1622    checkpoint57j_post
1623    o exf
1624      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
1625        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
1626        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
1627      * extended diagnostics output
1628        - now includes all EXF variables
1629        - hs, hl moved to common block
1630        - separate S/R for diagnostics, called after ctrl vector is added
1631        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
1632        - EXFqnet contains true Qnet (i.e. includes qsw)
1633      * updated verif. lab_sea, global_with_exf
1634      * Rearranging hflux (exf_mapfields -> exf_getforcing)
1635        to ensure that diagnostics sees a true EXFqnet
1636    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
1637    o diagnostics pkg: change pointers so that 1 diagnostic can be used
1638      several times with different frequencies.
1639    o mnc-ify the thsice package as requested by Daniel Enderton
1640      - the monitor--MNC output needs work
1641      - many attributes need to be added (most are currently blank)
1642    o mnc-ify theaim_v23 package as requested by Daniel Enderton
1643      - many attributes need to be added (most are currently blank)
1644    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
1645    o add Sadourny like discretization to the 4th.O vorticity advection scheme
1646    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
1647      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
1648         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
1649    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
1650     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
1651    
1652    checkpoint57i_post
1653    o Diagnostics package was changed: diagnostic allocation is now deactivated
1654      by setting an empty file name in the namelist (used to be by setting 0 frequency)
1655    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
1656      add 1rst Order upwind vertical Shear.
1657    o add a quick fix for A/B checkpointing in OFFLINE mode
1658    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
1659      end-run around the C/Fortran linking horror in eesup/src/timers.F
1660    o added pkg/runclock: allows user to terminate run based on wall clock
1661    o added non-hydrostatic scaling parameter: nh_am2
1662    o pkg/my82: futile attempt to make results compiler-independent by adding
1663      some "_d 0", etc. no effect.
1664    o for mnc output, fill the 'T' coordinate var with myTime and create a
1665      separate 'iter' variable for iteration count
1666    o pkg/diagnostics:
1667      add new capability: output of Global/Regional & per-level statistics ;
1668      tested against monitor output (including land & thSIce) on various exp.
1669    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
1670    
1671    checkpoint57h_done
1672      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
1673      data.diagnostics, data.gchem, data.ptracers) is done.
1674    
1675    o pkg/diagnostics: prepare for Global/Regional statistics.
1676      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
1677    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
1678      and rename it: DIFFERENT_MULTIPLE
1679    
1680    checkpoint57h_post
1681    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
1682    o pkg/diagnostics: change output frequency, now in seconds (instead
1683      of Nb of iterations). This requires to change data.diagnostics.
1684    checkpoint57h_pre
1685    
1686    o in mnc, let the user create the output dir if both mnc_outdir_date
1687      and mnc_outdir_num are false
1688    o add fflags() to pkg/diagnostics which allows one to specify, on a
1689      per-file basis, the file precision [default behavior is unchanged]
1690    o added diagnostics to pkg/kpp, including computation of mixed layer
1691      depth based on a temperature/density criterion
1692    o updated verification/natl_box to test the new pkg/kpp diagnostics
1693    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
1694    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
1695    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
1696      not mnc -- this mistake was found by JMC and is now corrected
1697    
1698    checkpoint57g_post
1699    o add Adams-Bashforth 3rd Order time stepping:
1700      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
1701      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
1702    checkpoint57g_pre
1703    
1704    o make lambda[Theta,Salt]ClimRelax spatially varying
1705      (default remains spatially uniform constant based on tau)
1706    o added new control variables
1707      * init. uVel, vVel, etanN
1708      * lambda[Theta,Salt]ClimRelax
1709    o separate masks used for ctrl_pack/unpack 'from write_grid' output
1710      (suggested by G. Forget)
1711    
1712    checkpoint57f_post
1713    o add parameter "baseTime" = model base time = time at iteration zero
1714      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
1715      account for baseTime shift
1716    o move Coriolis arrays from PARAMS.h to GRID.h
1717    checkpoint57f_pre
1718    
1719    o mnc-ifying the seaice package
1720    o introduced an alternative length scale calculation for use in the limiting
1721      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
1722    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
1723    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
1724      as well as grad(vort3).  Made it compatible with both approximate form
1725      for the cubed sphere and full form of these gradients.  Added flag
1726      useFullLeith to select between approximate and full form.  
1727    o add "d0" in getcon.F to reduce differences between compilers/platforms
1728      update output.txt of exp. fizhi-gridalt-hs
1729    o change port_rand funtion to allow to set the seed.
1730    o fix obscure MNC bug involving conversion between reals and integers
1731      - it caused no problems with certain (eg. gcc, ifc) compilers but the
1732        new version is now more standards-compliant
1733    o adjoint-related modifications
1734      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
1735      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
1736      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
1737    
1738    checkpoint57e_post
1739    o Adding eddy stress controls a la Ferreira et al.
1740    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
1741    
1742    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
1743      update output.txt of exp. fizhi-gridalt-hs
1744    o add more "Z" dimensions and associated coordinate vars to MNC
1745    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
1746    o parameter calendarDumps: when set, approximate months (30-31 days) and years
1747      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
1748      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
1749      months and years.  Requires pkg/cal.
1750    o diagnostics: add pickup functionality
1751      - off by default for backwards compatibility
1752      - current version only uses MDSIO -- MNC will be added
1753    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
1754    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
1755    
1756    checkpoint57d_post
1757    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
1758    o modify verification/ideal_2D_oce so that it tests the creation of mnc
1759      output from the diagnostics package
1760    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
1761    o make genmake2 more portable by using ".$FS" instead of ".f" for more
1762      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
1763    o add coordinate variables to the MNC output from the diagnostics package
1764    o change MNC-flags default value: true when useMNC=TRUE
1765    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
1766      the ability (off by default) to read the grid information using MNC
1767    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
1768    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
1769    o do snap-shot diagnostics at the middle of the time-interval (instead of
1770      at the end).
1771    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
1772      new test for AIM with thSIce + slab-ocean
1773    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
1774    o move state variable diagnostics to the beginning of the time step ;
1775      (note: still needs some work specially for snap-shot diagnostics)
1776      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
1777    
1778    checkpoint57c_post
1779    o Change testing option (-ieee) to get closer agreement between g77 & ifort
1780    o generate new output.txt files on faulks with g77 & the new -ieee option
1781    checkpoint57c_pre
1782    
1783    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
1784      update output.txt of exp. global_ocean.90x40x15
1785    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
1786      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
1787    o add saltFlux(+File) forcing capability with periodicExternalForcing
1788    o allow to use pkg diagnostics for GM-Redi & ThSIce output
1789    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
1790    o improvements for the MNC output from DIAGNOSTICS:
1791      - correct handling of the unlimitied dimension
1792      - all dims now have associated coordinate variables
1793      - variables located at U, V, and Corner ("Z") points are now written
1794        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
1795        *all* data points are output
1796    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
1797    o added pkg/seaice/seaice_monitor.F
1798    o mdsio_readfield.F can now read files visible only to master MPI process.
1799    o pkg/seaice: some test code for ice-modified ocean stress
1800    o exf_getffields interpolation defaults to bilinear for all scalar forcing
1801      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
1802      spurious negative numbers for precipitation and humidity.  Will cause
1803      some small numerical differences for integrations using pkg/exf/exf_interp.F.
1804    o pkg/ctrl/
1805      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
1806        May be enabled via doPackDiag
1807      *  introduce z-scaling of
1808         + gradient (doZscalePack) and
1809         + control (doZscaleUnpack)
1810    o pkg/mdsio/
1811      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
1812      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
1813    
1814    checkpoint57b_post
1815    o simplify options in diagnostics_fill arguments (remove weird combinations)
1816    o fix MNC coordinate variables so that they now contain per-face index
1817      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
1818      general, EXCH2 grids are only aligned to a "local" coordinate system
1819    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
1820    o Implement instantaneous output within pkg diagnostics:
1821      setting a negative frequency in data.diagnostics produces
1822     "snap-shot" output (as opposed to time-average if freq > 0)
1823    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
1824      NOTE: change ptracer diagnostics name: use 2 characters to work with
1825            more than 9 tracers. Add also diagnostics of advect & diffus flux.
1826    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
1827      becomes the coordinate variable for the 'T' dimension
1828    o add CF-style coordinate variables to MNC
1829      - just a first cut:  numbers are meaningless on the cubesphere and
1830        missing along the T axis but otherwise it works!
1831    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
1832    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
1833    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
1834      this is based directly on what the model compute, so that the content of
1835      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
1836    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
1837    o clean up build options files for SunOS, in particular
1838      - remove -traditional from xmakedepend
1839      - change -xarch=v9 to -xarch=native for f77
1840      - restore use of make (not gmake)
1841      - add CC=gcc if using g77
1842    o changes per discussion of AM, JMC, & EH3 today:
1843      - move redundant "grid" variables out of "state" -- in preparation of
1844        creating proper CF-style coordinate variables and in recognition
1845        that any/all grid variables can be easily copied (eg. w/NCO) from
1846        the grid files into any of the other NetCDF files
1847      - *always* output grid variables with MDSIO (this will eventually be
1848        changed)
1849      - output MNC grid file if useMNC is true
1850    o every instance of _END_MASTER() has been found and replaced with
1851      _END_MASTER( myThid ) in order to satisfy certain picky Sun
1852      preprocessors
1853    o re-arrange diagnostics pkg initialisation:
1854     - allow each package to extend the available diagnostics list
1855     - add some checking and fix small problems (multi-threaded, ...)
1856     - new S/R diagnostics_fill (replace fill_diagnostics):
1857       look through the short list of active diag. (instead of the long list)
1858       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
1859    
1860    checkpoint57a_post
1861    o this set of changes restores TAMC compatibility
1862      tested for global_ocean.90x40x15 adjoint on trough
1863      (what a pain)
1864    
1865    checkpoint57a_pre
1866    o some modifs in tools/build_options for sunos
1867    o call ctrl_pack for ctrl at end for optimcycle=0
1868    
1869    checkpoint57
1870    o add horizontal bi-harmonic viscosity for vertical velocity
1871      - new parameter viscA4W (defaults to viscA4)
1872      - affects only non-hydrostatic code
1873      - to be done: no-slip lateral boundary conditions
1874    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
1875    o implement Implicit Vertical advection for pTracers
1876    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
1877      (implemented also for implicit vertical diffusion & advection)
1878    o OBCS: extend application of tracer open boundary conditions
1879      to a strip beyond the boundary of width Olx/Oly
1880    o add call monitor to TAF set of required calls (flow directives)
1881      and include in natl_box_adjoint
1882    o untangle a few ifdefs related to cost, ctrl, autodiff
1883      untangel a few ALLOW_ECCO_OPTIMIZATION
1884    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
1885      (theta2, salt2 in ecco_cost_weights)
1886    
1887    checkpoint56c_post
1888    o OBCS as control variables
1889      - update ctrl_ad_diff.list, obcs_ad_diff.list
1890      - remove balance of obcs controls from default
1891      - fix index bug nobcs in ctrl_init
1892      - fix dummy fields filen in ctrl_pack
1893      - add dummy weights for obcs
1894    o lsopt: comment out fort.94 output
1895    o optim:
1896      - remove unnecessary header files
1897      - adjusted namelists
1898      - add xerbla.F to Makefile
1899    o exf:
1900      - multiple modifications of exf_check_range
1901      - unit change in exf_init_runoff from [m/year] to [m/s]
1902    o mdsio:
1903      - i/o-vector change debugLevel from debLevA to debLevB
1904    
1905    checkpoint56b_post
1906    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
1907      is called from DO_THE_MODEL_IO
1908      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
1909      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
1910      - clean up PTRACERS_WRITE_TIMEAVE a little
1911    o add another verification experiment that tests both the cfc-pkg and
1912      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
1913      reactive tendencies treated inline with regular timestepping
1914    o testreport previously did a lousy job of comparing small numbers, so
1915      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
1916      implemented in the little c-progam tmp_cmpnum.c which is embedded in
1917      testreport.
1918    o ptracers_monitor: bug fix for MPI
1919    
1920    checkpoint56a_post
1921    o GCHEM: finish reorganizating the package
1922      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
1923        (introduces another 3D-array for each passive tracer, but only if
1924        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
1925        gchemTendency is not needed because the timestep is done separately)
1926      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
1927      - GCHEM is now---more or less cleanly---separate from PTRACERS
1928      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
1929        so clear to me how that should be done in a general way.
1930    o CFC: improve formatting of output in CFC_ATMOS
1931    o PTRACERS:
1932      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
1933        that ALL experiments with ptracers enable can be checked. This makes
1934        GCHEM_MONITOR obsolete.
1935      - include a runtime parameter PTRACERS_monitorFreq that defaults to
1936        monitorFreq
1937      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
1938    o add PTRACERS (PTR0[1-5]) to testreport output
1939    o exf_check_range:
1940      * default changed to .TRUE.
1941      * will check values for niter0 if debLevA, every timestep if debLevB
1942      * STOP in exf_check_range if 'out of range'
1943      * range chosen generous to allow for potential extema
1944      TBD: a version with stricter range
1945           permitted range would be runtime parameters
1946    o GMredi:
1947      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
1948      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
1949      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
1950    o GCHEM:
1951      - move call to GCHEM_FORCING_SEP, so that it is now called before
1952        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
1953      - introduced a useGCHEM runtime flag and applied it everywhere.
1954      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
1955        this flag is now only visible within GCHEM-pkg routines.
1956      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
1957        be replaced by a 3D array that is computed before thermodynamics; for
1958        this, the tracer ID iTracer had to be included into the parameter list
1959        of ptracers_forcing
1960      - set up forward_step to call gchem_forcing, that will replace
1961        gchem_forcing_int in ptracers_forcing
1962      - cleaning up
1963    o small cleaning of exch2: remove files that are also in eesupp/src
1964    
1965    checkpoint56
1966    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
1967    o mnc: cleanup "full" files--fixes out-of-memory problem
1968    o ECCO-GODAE
1969      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
1970      * fully merged and updated from SIO code
1971        windstress sign change affects
1972        - exf_inscal_[u/v]stress
1973        - sign of xx_tau[u/v] adjustments
1974        - signs in cost_scat
1975      * ctrl_get_gen: avoid update of tau[u/v] for first few days
1976      * natl_box_adjoint updated and compressed
1977      * 2-level checkpoint switch added
1978        (tested in EXP. 1 of natl_box_adjoint)
1979      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
1980    o SVD
1981      * first complete, non-hacked version for SVD calculations
1982      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
1983        performed via direct access files admtlm_vector.it????
1984        (via ctrl_[un]pack)
1985      * optimcycle is used for ARPACK iteration counter
1986        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
1987      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
1988        and add linear transforms where necessary
1989      * controls are initial/final SST, SSS (can be extended; need to check
1990        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
1991    o mdsio: filename info to both stderr, stdout
1992    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
1993      from sign change
1994    
1995    checkpoint55j_post
1996    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
1997      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
1998    o add consistent build directories and .cvsignore files to verification
1999    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
2000    o make all subroutines 30 or less characters in length for certain older
2001      compilers to work (a thorough search only turns up two routines in
2002      pkg/ptracers)
2003    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
2004      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
2005    
2006    checkpoint55i_post
2007    o change arrays for total vertical diffusivity (2.D if explicit,
2008      3.D if implicit) ; each ptracer uses its own background value.
2009    o added mnc/NetCDF output capability to ocn_compon_interf
2010      - added bits to verification/cpl_aim+ocn so that it can run on
2011        ITRDA and other clusters without the mpirun "-wd" option
2012    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
2013      configuration
2014    o give MNC the ability to create additional files rather than
2015      exceeding a specified file size limit "MNC_MAX_FILESIZE"
2016      - the default is just less than 2GB which is a practical limit
2017        on many systems
2018    o Compute the non-local term using either KPP vertical diffusivity (=default)
2019       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
2020    
2021    checkpoint55h_post
2022    o add verification test "vermix"
2023    o remove all the *_ioinc flags and replace with the single global
2024      outputTypesInclusive flag
2025    o allow to set a vertical profile of vertical diffusivity for T & S
2026    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
2027    o useMNC moved from data.mnc to data.pkg
2028    
2029    checkpoint55g_post
2030    o Renaming carbon AD experiments to comply with testreport conventions
2031    o Updating adjoint of Held-Suarez hs94.1x64x5
2032    o Fixing directives for non-ECCO forward_step, after ECCO directives
2033      have been fixed to avoid recomp. of do_oceanic_phys
2034      Works well for global_ocean.90x40x15,
2035      but recomp. issue remains for carbon
2036    o Updating adjoint output for natl_box_adjoint after
2037      pkg/ecco has been modified (see taga c55d_post)
2038    
2039    checkpoint55f_post
2040    o rename to timeave_init_fixed
2041    
2042    checkpoint55e_post
2043    o some delicate re-shuffle of store directives to avoid one
2044      extra call of do_oceanic_physics
2045      affects ecco_the_main_loop.F, do_oceanic_physics.F
2046      checkpoint_lev1_directives.h
2047    o NB: this may break global_ocean adjoint temporarily,
2048      but it is clear how to fix it. Will do later, need this now.
2049    
2050    checkpoint55d_post
2051    o ECCO specific cost function terms (up-to-date with 1x1 runs)
2052    o ecco_cost_weights is modified to 1x1 runs
2053    o modifs to allow observations to be read in as
2054      single file or yearly files
2055    o enable to read exf forcing fields as either
2056      single file or yearly files (flag useExfYearlyFields)
2057    checkpoint55d_pre
2058    
2059    o switch between 2-level and 3-level checkpointing
2060    o add ability of MNC to write local and "partial" (eg. 2D slices where
2061      the full 3D field is never actually stored) arrays to NetCDF files
2062      with the correct (that is, the complete multi-dimensional) set of
2063      array indicies
2064      - used in mom_vecinv() to write the diagFreq output
2065      - tested (demonstrated) in verification/aim.5l_cs
2066    o further mnc-ification
2067      - add verification/lab_sea to the list with mnc setups
2068      - fix undefined mnc v-names in cd_code
2069      - add kpp to mnc output (both snapshot and timeave)
2070    o non-hydrostatic code
2071      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
2072        in calc_gw.F
2073      - defaults to viscAh
2074      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
2075        friction or Leith) in non-hydrostatic mode, as long as there is
2076        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
2077    o pkg/cost
2078      extend simple cost functions to treat time mean quantities
2079      (T,U,V) via cost_accumulate_state from cost_tile
2080    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
2081        be 2 times larger than the minimum size the advection scheme requires.
2082        now get a perfect conservation of salt in advect_cs test-exp (updated)
2083    o GGL90 (Gaspar's TKE mixed layer)
2084      - add horizontal diffusion of TKE, requires exchanges in
2085        do_fields_blocking_exchanges, horizontal diffusivity is zero by
2086        default. In OPA there is no horizontal diffusion of TKE but the
2087        mixing coefficients are computed from a horizontal average of TKE of
2088        6 points or so. I think that diffusion has a little more physical
2089        justification.
2090      - clean up ggl90_calc in the hope of reducing memory usage (this hope
2091        was in vain)
2092      - mask tke-variable in ggl90_init
2093    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
2094    o fix biharmonic diffusion on CS-grid.
2095    o more obcs stuff
2096      - added obcs_external_fields_load as an alternative to the EXF-pkg option
2097        for reading boundary values. This routine is called from
2098        obcs_prescribe_read
2099      - updated obcs_check
2100      - changed sponge layer relaxation parameter units for days to seconds
2101      - turned off sponge layer by default
2102      - changed argument list of OBCS_CALC to myTime+deltaTclock
2103      - fixed about 35 bugs in obcs_external_fields_load
2104    
2105    checkpoint55c_post
2106    o obcs stuff
2107      - new runtime flags useOBCSprescribe, useOBCSbalance
2108      - re-arranged obcs_calc
2109      - moved exf_getobcs to obcs_prescibe_read
2110        obcs_prescibe_read is called after ORLANSKI stuff
2111        and independent of it (executable can contain all).
2112      - updated obcs_check
2113      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
2114        These may be necessary only if tangential velocities are
2115        prescribed at OB, not sure, needs testing.
2116    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
2117      which simplifies the calls and passes the ifc check-bounds test
2118    
2119    checkpoint55b_post
2120    o add a 2D scalar, Z location, exchange_2 routine.
2121    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
2122      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
2123      affects advect_cs results (for the wrong reason): update output.txt
2124    o use a more standard discretization for biharmonic viscosity ;
2125     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
2126      affects results of dome set-up: update output.txt
2127    o fix gad_advection.F (CubedSphere part), back to version 1.23
2128    o fix bug in mom_vi_del2uv.F (CubedSphere part).
2129    
2130    checkpoint55a_post
2131    o merged code to
2132      * prescribe/read time-dependent open boundaries
2133        (works in conjunction with exf, cal)
2134      * sponge layer code for open boundaries
2135      * each boundary N/S/E/W now has its own CPP option
2136        (healthy for the adjoint)
2137    
2138    checkpoint55
2139    o up-to-date adjoint of previous breaks
2140      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
2141      - global_ocean_ebm: adjoint still needs fix (TLM ok)
2142      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
2143      - carbon: * remove tr1-related adjoint verification
2144                * add ptracer as control variable
2145    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
2146      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
2147    
2148    checkpoint54f_post
2149    o in verification/carbin/ remove experiment related to
2150      ALLOW_PASSIVE_TRACER (array tr1 etc)
2151      code_ad/ input_ad/ results_ad
2152    
2153    o add two new packages
2154      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
2155        + subject to optimization (memory)
2156      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
2157        + subject to reordering (many GOTOs in the original code)
2158        + so far opps is called for every (i,j) point, and then operates in
2159          the vertical; one may want to reorder the scheme in order operate in
2160          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
2161          fields)
2162    o overhaul of IO so that we now have flags for MDSIO and/or MNC
2163      - all verification tests compile and run with linux_ia32_g77
2164      - defaults are compatible with current input files--nothing
2165        should change if you were not previously using MNC
2166      - MNC output has been added in numerous places (eg. timeave)
2167        but there are still a few writes not yet do-able with MNC
2168        (this is in progress)
2169      - flags now allow for either/or/both use of MDSIO and MNC and
2170        documentation will soon follow
2171      - numerous small formatting cleanups for ProTeX
2172    o add version info (via BUILD_INFO.h) to MNC and stdout
2173    
2174    checkpoint54e_post
2175    o add two new packages
2176      - pp81 (Packanowski and Philander, 1981), Richardson number and
2177        stratification dependent mixing
2178      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
2179      - these scheme operate in a similar manner as KPP (without ghat, of
2180        course), however there is only one diffusivity that is used for both
2181        temperature and salinity (and passive tracers)ç
2182    o add offline package
2183    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
2184      provided by Stephanie Dutkiewicz
2185    o genmake2: add ability to search for C compilers and cleanup test output
2186      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
2187    
2188    checkpoint54d_post
2189    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
2190    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
2191      leading to additional shift by 5 days each year of integration
2192       (i.e. leading to considerable offset over the years)
2193    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
2194    o start with no AB and no initial filtering (staggerTimeStep):
2195      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
2196    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
2197      (external loading & cpl import/export stay in forward_step.F)
2198    o update coupling interface to work with new staggerTimeStep
2199    o change MDSIO ptracers_pickup.
2200    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
2201    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
2202    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
2203    
2204    checkpoint54c_post
2205    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
2206      this affects (truncation error) output.txt of test-exp:
2207       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
2208    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
2209    o change Qnet to always be the net heat flux, (+upward).
2210      affects (truncation error) output of natl_box exp.: updated
2211    o define the max number of passive tracers in PTRACERS_SIZE.h
2212    o start to test mnc routinely in exp0
2213    o add sea-ice loading (sIceLoad) as a new forcing field.
2214    
2215    checkpoint54b_post
2216    o add testreport "-j JOBS" option for parallel builds (tested and pretty
2217       impressive on Altix and Opteron systems)
2218    o diagnostics can now write NetCDF files through the mnc package
2219    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
2220    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
2221    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
2222      affects (truncation error) output of lab_sea & natl_box exp.: updated
2223    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
2224    
2225    checkpoint54a_post
2226    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
2227    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
2228    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
2229    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
2230      + internal_wave (shift in writing cg2d_ini_res)
2231    checkpoint54a_pre
2232    
2233    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
2234      - modified verification/lab_sea and natl_box_adjoint accordingly
2235    
2236    checkpoint54
2237    checkpoint53g_post
2238    o prepare splitting of thermodynamics: store convect.counter in common block
2239    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
2240      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
2241    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
2242    o new parameter "nShapS": allow to treat differently S from T (nShapT)
2243    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
2244    o restore adjointability
2245    
2246    checkpoint53f_post
2247    o modifications that affect AIM experiment results (update output.txt):
2248      - no advection of S at top interface Nr (pkg/generic_advdiff)
2249      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
2250    o AIM pkg:
2251      - include stability function into surf.Flux derivative relative to Tsurf
2252      - calculate clear-sky radiation & surface temp. change (for diagnostics)
2253    
2254    checkpoint53e_post
2255    o merged cylindrical coord configuration
2256    o added rotating_tank experiment
2257    checkpoint53e_pre
2258    
2259    checkpoint53d_post
2260    o faulks upgraded: re-generate output.txt that have changed:
2261       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
2262    o Added Bryan and Lewis, 1979, vertical diffusivity profile
2263    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
2264    o added Sadourny discretization of Coriolis
2265      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
2266      - re-enabled use of omega3 (useAbsVorticity)
2267    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
2268      vector-invariant equations
2269      - note: does *NOT* yet use same variable visc. for no-slip BC's.
2270    o recoded the lateral boundary conditions for non-hydrostatic w, this time
2271      hopefully without new bugs
2272      - still to do: biharmonic friction for non-hydrostatic w
2273    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
2274    o regenerated output for global_ocean_ebm (using -ieee)
2275    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
2276      of mom_common/
2277      - simple re-arrangement of instructions within computing loop
2278    checkpoint53d_pre
2279    
2280    checkpoint53c_post
2281    o new version of coupler for AIM+thSIce and Ocean models
2282     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
2283     - land: change Evaporation of snow
2284     - aim with thSIce: fix bug in snow-precip.
2285    o changes to calc_gw.F
2286     - bug fix for w^2 term near the bottom boundary
2287     - (hopefully) improve the lateral slip boundary condtions for use with
2288        partial/looped cells
2289      - because the bug fix changes two verification experiments anyway (exp5
2290        and plume on slope), change the lateral boundary condition from half slip
2291        to the value of no_slip_sides
2292    o ebm package wasnt quite up to the parallel task. Fixed that.
2293    o Adjoint of EBM package + verification
2294      * TLM OK
2295      * ADM not sufficient accuracy yet (needs further testing)
2296    
2297    checkpoint53b_post
2298    o Commiting new energy balance model to repository
2299      * package is pkg/ebm
2300      * verif. is verification/global_ocean_ebm
2301      * references are in ebm_driver.F
2302    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2303    C        Global thermohaline circulation. Part I:
2304    C        Sensitivity to atmospheric moisture transport.
2305    C        J. Climate 12(1), 71-82
2306    C      * X. Wang, P. Stone and J. Marotzke, 1999:
2307    C        Global thermohaline circulation. Part II:
2308    C        Sensitivity with interactive transport.
2309    C        J. Climate 12(1), 83-91
2310    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
2311    C        Destabilization of the thermohaline circulation
2312    C        by atmospheric eddy transports.
2313    C        J. Climate 7(12), 1870-1882
2314    o Will need long integration testing.
2315    checkpoint53b_pre
2316    
2317    o created pkg/mom_common in preparation for variable viscosity code
2318    o renamed and split ini_mnc_io
2319    o pkg/land: only liquid water can diffuse or run-off
2320    o AIM using land: soil wetness availability account for snow
2321    o added printMapIncludesZeros to EEPARMS namelist
2322    
2323    checkpoint53a_post
2324    o restore TAMC compatiility for exf_constants.h
2325      (no usage of _d in .h)
2326    o Additional storing in KPP in an attempt to fix
2327      TAMC problem with adjoint of KPP code.
2328      (no success...)
2329      Identical code works fine with TAF.
2330    o Fixed verification/natl_box_adjoint experiments.
2331      Initial conditions for Experiments 4 and 5 are now
2332      set to "SEAICE_initialHEFF=0", which is more reasonable,
2333      and hence gives results closer to that of Experiment 2.
2334      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
2335    
2336    checkpoint53
2337    o stable checkpoint with up to date adjoint
2338      TLM tests only run for 1st grdchk at the moment. Its unclear if
2339      this is a code problem or a problem with resetting code for g_
2340      variables that is being autogenerated wrong.
2341      Otherwise:
2342       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
2343       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
2344         are both still in chaos following their security messes.
2345    
2346    checkpoint52n_post
2347    o various build (mostly genmake2) changes including:
2348      - ability to build/run more easily within Cygwin and MacOS X
2349      - more complicated Makefiles with a stronger dependence on Gnu Make
2350    o pkg/seaice modifications
2351      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
2352        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
2353        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
2354      - changed proxy for geostrophic velocity and updated
2355        verification/lab_sea/results/* accordingly
2356      - removed ADI dynamic solver from pkg/seaice
2357      - replaced all occurrences of 1/CSTICE or 1/CSUICE
2358        they caused a segmentation fault under certain circumstances
2359      - removed unused field WATR
2360    o bug fix in exf-package:
2361      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
2362         now reflect that.
2363    o small fixes in the cal-package:
2364      - set reference date to first of January for the 'model'-calendar
2365      - failing of cal_CheckDate in cal_FullDate now actually results in a
2366        warning
2367    o small modifications in exf-package to increase flexibility:
2368      - change climtempfreeze from a constant to a runtime parameter that
2369        is specified in data.exf_clim (default = -1.9)
2370      - introduce runtime parameter windstressmax (default = 2.0) that is
2371        specified in data.exf
2372    o fix in pkg/thsice:
2373      - update Evap (Tsf changes) to be consistent with Latent heat flux
2374      - maintain snow precipitation unchanged (even if Tsf >=0).
2375     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
2376    
2377    checkpoint52m_post
2378    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
2379      this does not change any of the results, because myIter=0 in swfrac always
2380      lead to jwtype=2 (the default anyway), but the call makes little sense
2381      as a default
2382    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
2383    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
2384      atmospheric model (AIM) to use it ; add a "slab ocean" component.
2385    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
2386    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
2387    o extending useSingleCpuIO option to work with new exch2 I/O format
2388      - old-style, missing-tile I/O is still accessible by defining CPP
2389        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
2390    o monitor package can write to NetCDF files and/or STDOUT
2391    o fix re-definition bug in MNC_GRID_INIT_ALL()
2392    o doc/api_reference added
2393      - a framework for building an API Reference Manual using all
2394        the "protex" comments embedded in the code
2395      - see pkg/generic_advdiff, pkg/mnc for examples
2396    o MNC:
2397      - make myThid the last argument for all subroutines
2398      - new default for the grid files: NO halos
2399      - add useMNC and other run-time flags
2400      - separate per-file-group handling of the unlimited dimension
2401      - early initialization of MNC w/ flags read at the eeboot stage
2402        and lookup tables set in initialize_fixed
2403      - write all MNC output to a freshly-created directory
2404    o thermodynamics sea-ice (thsice) is now tested with testreport.
2405    o test exp. advect_cs: use the standard cs32 grid ; update output.
2406    o Added functionality to grdchk:
2407      pick global i,j,k position (or nearest wet) where to perform check.
2408    
2409    checkpoint52l_post
2410    o new land formulation:
2411      a) use ground enthalpy as prognostic variable to ensure exact
2412         energy conservation.
2413      b) account for water temperature and for latent heat of freezing
2414         in all processes (rain, run-off, ground storage)
2415      c) compute surface and ground temperature implicitly.
2416    o aim_v23 modification for new land model:
2417      a) Treat separately land / ocean / sea-ice surface fluxes
2418         to allow implicit computation of land & sea-ice surface temp.
2419      b) add snow precipitation.
2420    checkpoint52l_pre
2421    
2422    o fix problem (when 1 tile is empty) in min/max monitor.
2423    o fix bug in timeAve (u,vZetatave in common block)
2424    o no restoring terms under ice for pkg/seaice
2425    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
2426    o bug fix for pkg/seaice pickups
2427    o change MNC call locations and add coordinate attributes
2428    o mask vorticity at the corner ; affects global_ocean.cs output
2429    o fix ini_curvilinear_grid ; test CS experiments with mpi
2430    o aim.5l_cs: modify sea-ice fraction input file ; update output
2431    o exf: Adding simple range check routine for exf fields after read
2432    
2433    checkpoint52k_post
2434    o removed top-level directory "diags"
2435      - we migrated these functions to pkg/timeave a long time ago
2436    o fixed bug introduced in pkg/monitor
2437    o accuracy ctrlprec = 32 insuffient for gradient checks using
2438      averaged fields (I/O via cost_averages)
2439      -> use ctrl.h in active_file*.F to control I/O precision.
2440    o paramter list of CALL ADTHE_MAIN_LOOP
2441    o added initial do_the_model_io to ecco
2442    o set all ...Freq to zero after cost_final
2443      taveFreq, dumpFreq, pChkptFreq
2444    o MAIN and ECCO differentiability restored
2445    
2446    checkpoint52j_post
2447    o fix nchklev in tamc.h for global_ocean...
2448    o Bringing flow and store directives up-to-date
2449    o Really weird thing!
2450      call do_the_model_io from the_main_loop with parameters
2451      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
2452      TAF places a faulty re-call of initialise_varia
2453      after cost_final call which should not be there!
2454    checkpoint52j_pre
2455    
2456    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
2457      error messages
2458    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
2459    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
2460      debug output
2461    o modfied mdsio_writefield.F to handle non-global files under exch2
2462    o update AIM Cubed-Sphere exp (aim.5l_cs):
2463      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
2464    o update AIM Equatorial Channel exp:
2465      use standard aim_v23 pkg and change the SST fields to be more realistic.
2466    o globalFile now works with exch2
2467    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
2468      mon_vort3.F to make exch2 friendly with >1 tile per cube face
2469    o limit timeave output for hi-res integrations
2470    
2471    checkpoint52i_post
2472    o removed CPP_EEOPTIONS.h from verification/*/code
2473    o updated the tiling for global_ocean_pressure
2474    checkpoint52i_pre
2475    
2476    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
2477      the old pkg/aim).
2478    
2479    checkpoint52h_pre
2480    o shortened offending lines in exch2_send_rx?.template
2481    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
2482    o genmake2: add build & execute test for NetCDF code
2483    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
2484      old grid files, moved CPP_EEMACROS.h to pkg/exch2
2485    o added useSingleCPUIO flag to monitor.F and mon_out.F
2486    o added temporary hack for sea-ice dynamics on the cube:
2487      metric terms are ignored and it is assumed that
2488      there is no sea-ice on cube faces 1, 2, 4, and 5.
2489    
2490    checkpoint52f_post
2491    o added exch2 cube routines to pkg/exch2
2492    o modified hs94.cs-32x32x5 to use it
2493    o added new grid files to hs94.cs-32x32x5
2494    checkpoint52f_pre
2495    
2496    checkpoint52e_post
2497    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
2498      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
2499    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
2500      to work with implicit vertical advection and AB ;
2501    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
2502    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
2503     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
2504    checkpoint52e_pre
2505    
2506    o fix bug in impldiff when Nr=1 or Nr=2.
2507    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
2508    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
2509    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
2510      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
2511    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
2512    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
2513    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
2514    
2515    checkpoint52d_post
2516    o re-tiled many expts to allow comparison in multi-processor mode
2517      - updated output accordingly
2518      - changed hs94.128x64x5 to use intial T from file rather than use the
2519        random number generator
2520    o add infrastructure in model routines for fizhi and gridalt packages
2521    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
2522    o changes to permit hi-res, cubed-sphere, configuration
2523      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
2524      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
2525      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
2526        of surface winds for the cube
2527      (A verification experiment, based on global_ocean.cs32x15, but with
2528       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
2529       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
2530       complete with example surface forcing files and matlab scripts to look
2531       at the output and compare it with that of global_ocean.cs32x15.)
2532    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
2533       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
2534       to conform to the common rule.
2535    o check-in the first version of the coupler + interfaces for multi-components
2536       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
2537       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
2538       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
2539       - ocean and atmos. share the same horizontal grid (no interpolation).
2540       - exchanges between component and coupler is done in forward_step
2541    o new verification experiment, cpl_aim+ocn:
2542       coupled ocean - AIM atmosphere on cs32 grid.
2543    
2544    checkpoint52d_pre
2545    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
2546    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
2547    
2548    checkpoint52c_post
2549    o Fixing OPTIONS files for use of exf:
2550      - ALLOW_ECCO not needed
2551      - ECCO_CPPOPTIONS.h should not be included from
2552        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
2553        as has been the case in the past
2554      - All cal/exf related options are currently set in
2555        single header file. Should remain so until we
2556        agree on a consistent new policy.
2557    o Removed all CPP options for cal package.
2558      cal has no more CPP options.
2559    o modified STOREs in GAD_ADVECTION
2560    o corrected key comp. for passkey
2561    
2562    checkpoint52b_post
2563    o new version: "thsice" of thermodynamic sea-ice pkg:
2564     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
2565     - modify fluxes but do not change theta directly;
2566     - light cleaning of bulk_force pkg (still needed with thsice).
2567     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
2568       + output_thsice.txt to test thsice & bulk_force pkgs.
2569    o put back grid & coriolis monitor output.
2570    checkpoint52b_pre
2571    
2572    o call "do_the_model_io" at the beginning (=> dump initial state)
2573    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
2574    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
2575      (need info on NUMBER_OF_PTRACERS)
2576    o missing PTRACERS headers in some routines
2577    o default tamc.h in pkg/autodiff supposed to crash
2578      to ensure proper customization
2579    
2580    checkpoint52a_post
2581    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
2582      - moved surfaceTendencyTice from pkg/seaice to main code
2583      - subroutine FREEZE_SURFACE now limits only surface temperature
2584        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
2585        => new output.txt for global_ocean.cs32x15 & global_with_exf
2586      - keep the old version of FREEZE for backward compatibility;
2587        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
2588      - corresponding modifs for TAF directives
2589    o added surface flux output variables to TIMEAVE_STATVARS
2590    o time-averaged output for pkg/ptracers
2591    o fix problem with ECCO-related divided adjoint
2592      snapshot file was missing some ad-variables,
2593      but no warning issued by TAF
2594    
2595    checkpoint52a_pre
2596    o some bug fixes for #undef REAL4_IS_SLOW
2597    
2598    checkpoint52 = ecco_c52_e35
2599    o after testing adjoints of checkpoint51u_post
2600    
2601    checkpoint51u_post
2602    o this is the post-merge tag of the ecco-branch
2603      (needs another clean checkout and re-testing)
2604    o various natl_box_adjoint configs and results
2605      but no input fields
2606    o obcs adjoint not yet merged!
2607    o adding ECCO global 1x1 and 2x2 degree configs
2608    o updated/extended some store directives for seaice
2609    o pkg/ecco now containes ecco-specific part of cost function
2610    o top level routines the_main_loop, forward_step
2611      supersede those in model/src/
2612      previous input data.cost now in data.ecco
2613      (new namelist ecco_cost_nml)
2614    o in ctrl/ cleaned some cross-dependencies and updated CPP options
2615    
2616    checkpoint51t_post
2617    o this is the pre-merge tag of the ecco-branch
2618    
2619    checkpoint51s_post
2620    o cleanup: removed various obsolete #define-s
2621    o pkg/grdchk
2622      - renamed 'ph-grd 3' to 'grad-res'
2623      - merged from ecco-branch
2624        (remaining bug fixes for obcs gradient checks)
2625      - additional high-precision output for testreport
2626        (grep for 'precision_grdchk_result')
2627    
2628    checkpoint51r_post
2629    o cleaned up or removed CPP_OPTIONS.h files
2630    o updated results for some of the tests to reflect the new
2631      optfiles (-ieee: -O0 instead of -O3)
2632    
2633    checkpoint51q_post
2634    o cd_code:
2635      - moved cd_scheme.F -> cd_code_scheme.F
2636      - separate read_checkpoint from cd_code_ini_vars.F
2637      - separated cd_code part from write_checkpoint
2638      - updated AD_SOURCE, generated .flow
2639      - added CD_CODE_VARS.h to the_main_loop
2640      - Moving cd_code specific store dir.s to pkg/cd_code
2641    o ctrl package totally restructured
2642      - pack/unpack now optional and decoupled from
2643        xx_/adxx_ I/O
2644      - ctrl_pack/unpack cleaned
2645        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
2646      - confined inclusion of AD_CONFIG.h to where necessary.
2647    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
2648    
2649    checkpoint51p_post
2650    o create initial cd_code package
2651      - WARNING: the initialization of fields within packages
2652        is broken because INI_FIELDS (where READ_CHECKPOINT is
2653        called) is called *before* PACKAGES_INIT_VARIABLES.
2654        This seems to be backwards since
2655        1) its important to initially zero the entire field including
2656           the "halo" region
2657        2) zeroing needs to be done *before* reading pickup info
2658           and the pickup call might or might not happen in any
2659           particular run
2660      - this needs an overhaul for R2
2661    o cleanup verification/*/code/GMREDI_OPTIONS.h
2662    o cleanup testreport
2663    
2664    checkpoint51o_post
2665    o bringing AD-related verif's up to date with genmake2
2666      - carbon/
2667      - global_ocean.90x40x15/
2668      - hs.94.1x64x5/
2669      - (front_relax/ )
2670    o (more) consistent directory structure for AD-related verif.'s
2671    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
2672    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
2673    o bug fix in find_alpha.F for MDJWF:
2674      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
2675        change rho -> rho-rhoConst
2676      - replace call find_rho to find_rhonum
2677    o initialisation of rFlx extended to full array (required by TAF)
2678      and shifted to thermodynamics
2679    o removed PTRACERS.h in ptracers routine
2680    o added surfacetendencyPtr to S/R parameter list pracers_forcing
2681    o Correcting initialisations for fVerU, fVerV.
2682    o helping TAF to recognize dependency on kUp for
2683      fVerU, fVerV
2684    o Replacing delZ by delR in pkg/ctrl/
2685    checkpoint51o_pre
2686    
2687    o undid all of cp51 pending some cleanups and discussion
2688    o added the [#include "AD_CONFIG.h"] statement to all files that need
2689       it for adjoint/tl #defines
2690     o re-worked the build logic in genmake2 to support AD_CONFIG.h
2691     o removed tools/genmake since it no longer works
2692    
2693    checkpoint51n_post
2694    o modifications to make FREEZE flux visible to pkg/kpp
2695      - moved surfaceTendencyTice from pkg/seaice to main code
2696      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
2697      - subroutine FREEZE now limits only surface temperature
2698        (this means new output.txt for global_ocean.90x40x15,
2699         global_ocean.cs32x15, and global_with_exf)
2700    o added surface flux output variables to TIMEAVE_STATVARS
2701    
2702    checkpoint51n_pre
2703    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
2704    o added [#include "AD_CONFIG.h"] to all files that use the following
2705      defines:
2706      - ALLOW_ADJOINT_RUN
2707      - ALLOW_TANGENTLINEAR_RUN
2708      - ALLOW_ECCO_OPTIMIZATION
2709    
2710    checkpoint51m_post
2711    o incorporating changes to get TAMC/TAF working in genmake2
2712      - added new TAMC/TAF targets to the Makefile
2713      - various cleanups related to package handling
2714      - these changes should have no impact on the forward model
2715    
2716    checkpoint51l_post
2717    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
2718     - faster algorithm for cal_addtime.F
2719     - higher precision arithmetic, where needed
2720     - pkg/exf *startdate variables changed from calendar date to
2721       model integration time
2722    
2723    checkpoint51l_pre
2724    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
2725    o enable to apply restoring on S & T only in a latitude band.
2726    o update output (external_forcing_surf modif. change truncation errors)
2727       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
2728    
2729    checkpoint51k_post
2730    o change default to: useNHMTerms=.FALSE.
2731     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
2732       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
2733     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
2734        exp1, ideal_2D_oce
2735     - change data file of oceanic exp (leave the results unchanged for now)
2736       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
2737    o set gravitySign automatically according to the vertical coordinate used
2738      (and change sign: back to "logical" value: +1 when R increases downward)
2739    o added an include barrier to the default CPP_OPTIONS.h and
2740      removed the #include "PACKAGES_CONFIG.h" from it
2741    o fix a bug in mom_fluxform (from chk51j_post)
2742    
2743    checkpoint51j_post
2744    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
2745    o adjusted some flow directives (dynamics, thermodynamics)
2746    o added cubed-sphere case to test cost function
2747    o heckpoint_lev?_directives.h now include
2748      pkg-specific directives, whenever those are enabled.
2749    o Moving pkg-specific flow directives to corresponding pkg
2750      Moving pkg-specific differentiation list to corresponding pkg
2751      Moving pkg-specific checkpoint-lev storing to corresponding pkg
2752      ---> conventions are
2753           - pkg_ad.flow
2754           - pkg_ad_diff.list
2755           - pkg_ad_check_lev?_dir.h
2756    
2757    checkpoint51i_post
2758    o merge of the branch-genmake2
2759      - knowingly breaks the older genmake
2760      - automatic generation of all ALLOW_${PKG_NAME} defines
2761      - new testreport supersedes older testscript
2762    o large number of package inclusion and header cleanups
2763    checkpoint51i_pre
2764    
2765    o new output for adjoin of global ocean vector invariant
2766    o fix for checkpoint of thermodynamic seaice and bulk_force
2767    o Steph gchem various cleanups
2768    
2769    checkpoint 51h_pre
2770    o fixed some single quotes
2771    o modify gchem pkg to be more versatile
2772    o modifications to clean up dic pkg
2773    o add pkg/cfc
2774    
2775    checkpoint51g_post
2776    o provide links for ARPACK and ADM*TLM
2777    o start removing verification/vero/
2778    o update AD-related stuff
2779      (in particular some IF-statements in model/src/ routines)
2780    o adding to verification/global_ocean.90x40x15/ adjoint of
2781      vector invariant setup
2782    
2783    checkpoint51f_post
2784    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
2785    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
2786      of tracer Green's fucntions for ocean inversion project.
2787    
2788    checkpoint51f_pre
2789    o Added on-the-fly spatial interpolation capability
2790        "USE_EXF_INTERPOLATION" to pkg/exf.
2791      - This is a temporary Cartesian-grid hack until
2792        the super-duper ESMF coupler becomes available.
2793      - See verification/global_with_exf/README for usage example.
2794      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
2795        flags and modified pkg/seaice accordingly.
2796    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
2797        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
2798        non-local transport term.
2799    
2800    checkpoint51e_post
2801    o pkg/mom_vecinv:
2802      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
2803      - add time-ave diagnostic of vorticity advection.
2804    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
2805    o atmospheric geopotential: - include water vapor effect;
2806                                - use p^kappa in p* scaling.
2807    o land pkg: read initial state from files.
2808    o AIM : add stratospheric drag in the upper level
2809    
2810    checkpoint51d_post
2811    o change function ILNBLNK (=> last non-blank char.) to return zero
2812      (instead of the string length) when the string. char is empty
2813    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
2814    o modif's to restore TAMC compatibility
2815      - avoid "_d" constructs in PARAMETER declarations
2816      - avoid interrupting lines by comment lines
2817    o Use cluster local disks for purely local I/O
2818      vs. globally visible disks needed for ctrl stuff
2819      (merged from ecco-branch)
2820      - new active_file_loc... and mdsio_..._loc routines
2821      - affected packages: autodiff, ctrl, grdchk, mdsio
2822    
2823    checkpoint51c_post
2824    o introducing integer flag debugLevel
2825      - debLevZero: suppress all output
2826      - debLevA: standard
2827      - debLevB: equivalent to current debugMode=.TRUE.
2828    o introducing pathname variable mdsioLocalDir for mdsio
2829      that can be specified at runtime
2830      (relevant for cluster I/O to local disk)
2831    `
2832    >>>checkpoint51b_post
2833    adjoint of ptracers
2834    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
2835    o extended state in checkpoint_lev?, etc.
2836    o alternative ctrl/cost with tr1 or ptracer
2837    o new comlev1_bibj_ptracers
2838    o new ptracers.flow
2839    o made ptracers_forcing same as external_forcing_s
2840    o added verification for adjoint with ptracers
2841      - adm. grdchk fail so far
2842      - tlm. grdchk OK
2843      - checked tapelev/comlev recomputations: OK
2844    <<<checkpoint51b_pre
2845    
2846    checkpoint51a_post
2847    o added code for biogeochemistry package
2848      - new pkgs: dic, gchem
2849      - new subroutine in ptracers
2850    o modify code for biogeo packages
2851      - in model/src and pkg/ptracers
2852    
2853    checkpoint51
2854    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
2855      - autodiff, ctrl, exf, grdchk, seaice
2856      kept separate packages
2857      - cost, ecco, obcs
2858    o updating verification/internal_wave, verification/lab_sea
2859      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
2860    
2861    checkpoint50i_post
2862    o Preparing next differentiable checkpoint and sync
2863      of MAIN vs. ecco-branch
2864      - 1st step: this one is differentiable
2865      - 2nd step: next(! not this) checkpoint will have updated packages
2866                  from ecco-branch)
2867    
2868    checkpoint50h_post
2869    o new package "land": provide surface BC for AIM.
2870    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
2871    o AIM: use true log-P extrapolation for near surface temp (= as in
2872        F.Molteni paper) ; update aim.5l_cs output.
2873    o New variable in PARM03 for more flexible pickups
2874    o somewhat cleaned package initialisation sequence for
2875      ctrl/ cost/ ecco/ in packages_... routines
2876    
2877    checkpoint50g_post
2878    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
2879      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
2880      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
2881        made the default because of faster convergence than ADI
2882    
2883    checkpoint50f_post
2884    o exf totally restructured
2885      - replaced all exf_set_ routines by one generic exf_set_gen.F
2886        and made sure it's still differentiable
2887      - split exf_getffields.F into new exf_bulkformulae.F
2888      - exf_inscal_/exf_outscal_ suffixes consistent with field names
2889      - updated adjoint/makefile and relevant verif. accordingly
2890    
2891    checkpoint50f_pre
2892     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
2893          + change Evap over land. (update aim.5l_cs output)
2894     o added missing .cvsignores and made uniform across expts
2895     o changed configuration of tidal_basin_2d expt
2896     o added pkg/debug functions for tracing code in fatal crashes
2897     o tidied pkg/monitor to use MONITOR_OPTIONS.h
2898     o new fn in pkg/monitor to stop model if solution grows too big
2899     o removed lots of single quotes from comments
2900    
2901    checkpoint50e_post
2902    o make KPP work with PTRACERS
2903     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
2904       nearly a copy of kpp_transport_s
2905     - there is no analogue to SurfaceTendencyS, so I have to use
2906       gPtr(of the surface layer) instead
2907    o add a new platform SunFire+mpi (SunFire 15000) to genmake
2908    checkpoint50e_pre
2909    
2910    checkpoint50d_post
2911    o change kpp output from multiple-record state files to single-record state
2912      files analogous to write_state.F
2913    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
2914      analogous to the cg2d-related output.
2915    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
2916      so that writing to internal file fn (with length 512) fails.
2917    checkpoint50d_pre
2918    
2919    checkpoint50c_post
2920    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
2921    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
2922    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
2923    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
2924    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
2925    
2926    checkpoint50c_pre
2927    Merging from release1_p13:
2928    o bug fix for pkg/seaice dynamic solver
2929    o Added SEAICE_initialHEFF to pkg/seaice
2930    
2931    checkpoint50b_post
2932    o store u*,v* in gU,V instead of in guNm1,gvNm1
2933    o in order to put the momForcing out of the Adams-Bashforth:
2934      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
2935      to timestep.F
2936    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
2937    o re-generate output for highly sensitive test-exp:
2938       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
2939    
2940    checkpoint50b_pre
2941    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
2942    o corrected CPP option mismatch in exf_Bulk... functions for case
2943      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
2944    
2945    checkpoint50a_post
2946    o Bug fix for merging between c50 and KPP.
2947      ikey was passed from thermodynamics to kpp_calc via
2948      common block rather than being recomputed in kpp_calc,
2949      in contradiction with new key itdkey.
2950      New key ikppkey created, and tamc.h headers updated.
2951    
2952    checkpoint50
2953    - 2nd step of merge with ecco-branch:
2954      merge changes in ecco-branch back into main trunk
2955    - bug fix in find_alpha
2956    - more storing in gmredi_calc_tensor.F, kpp_routines.F
2957    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
2958    - merged some sliced AD support routines
2959    
2960    checkpoint49
2961    merged from ecco-branch:
2962    o exf:
2963      - Enable initialisation of forcing fields to constant
2964        (runtime) values.
2965      - in exf_getffields.F
2966        Reduce i-/j-loop to interior domain, discarding overlaps.
2967        That also fixes wrong TAF-key computations for key_1, key_2
2968        with bulf formulae.
2969      - exf_init.F modify #ifdef for exf_init_evap
2970      - exf_getffieldrec.F, ctrl_getrec.F
2971        The following INT-usages are not safe:
2972          fldsecs  = int(fldsecs/fldperiod)*fldperiod
2973          fldcount = int(fldsecs/fldperiod) + 1
2974        and were modified.
2975    o autodiff: checkpoint_lev...
2976      - updated storing for bulk formulae (some arrays were missing)
2977      - added state for seaice package
2978      - synchronized with main branch
2979    o DIVA:
2980      Modif.s in
2981      - the_main_loop.F
2982      - the_model_main.F
2983      and added cost_final_restore.F cost_final_store.F
2984      o With these changes, it is possible to fully separate
2985        the first forward run to compute the cost function (mdthe_main_loop)
2986        and adjoint runs over individual DIVA intervals (adthe_main_loop)
2987        into separate model executions.
2988        This enables better tuning of DIVA to given queue sizes.
2989      o Loss of cost function value in consecutive DIVA runs is
2990        fixed by storing to 'costfinal' file.
2991      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
2992        beginning/end of adjoint integration is accounted for.
2993      The current changes apply to TAF-1.4.26.
2994      TAF has one remaining bug, requiring one manual change
2995      (see MITgcm manual).
2996    o cal: synchronized between MAIN and ecco-branch
2997    
2998    checkpoint48i_post
2999    o Changes to restore differentiability of code w.r.t. previous tag
3000      (mostly adding new routines to make list and replacing
3001      pressure by totPhiHyd).
3002    o Updated and merged grdchk package
3003      - has both ADM and TLM checks
3004      - works for single- and multi-proc.
3005      - output cleaned
3006      - worked successfully for parallel DIVA
3007    o genmake:
3008      - Adding -platform=SP4
3009      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
3010    o Modif. for DIVA:
3011      ctrl_unpack should not be called in intermediate DIVA interval.
3012      (similar thing would apply for active files such as
3013      tbar, sbar, psbar, which should not be reinitialised;
3014      only relevant for ecco-branch)
3015    
3016    checkpoint48h_post
3017    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
3018    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
3019    o Added SEAICE_initialHEFF to pkg/seaice
3020    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
3021    
3022    checkpoint48g_post
3023    --- EOS:
3024    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
3025      store total Potential in totPhyHyd for diagnostics & EOS.
3026    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
3027    --- Pressure/geopotential gradient:
3028    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
3029    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
3030      ( changes results of global_ocean_pressure )
3031    o NLFS + z-coord.: add eta*Rho' contribution.
3032    o accurate phiHyd when using interface-W at the middle between 2 centers
3033     ( changes results of ideal_2D_oce )
3034    o includes r* 2nd term in potential gradient.
3035    
3036    checkpoint48f_post
3037    Merging from release1_p12:
3038    o Modifications for using pkg/exf with pkg/seaice
3039      - improved description of the various forcing configurations
3040      - added basic radiation bulk formulae to pkg/exf
3041      - units/sign fix for evap computation in exf_getffields.F
3042      - updated verification/global_with_exf/results/output.txt
3043    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
3044      (SBO) core products, including oceanic mass, center-of-mass,
3045      angular, and bottom pressure (see pkg/sbo/README.sbo).
3046    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
3047      to avoid negative values in shallow regions.
3048      - updated verification/natl_box/results/output.txt
3049      - updated verification/lab_sea/results/output.txt
3050    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
3051    o Added useSingleCpuIO option (see PARAMS.h).
3052    o Updated useSingleCpuIO option in mdsio_writefield.F to
3053      work with multi-field files, e.g., for single-file pickup.
3054    o pkg/seaice:
3055      - bug fix in growth.F: QNET for no shortwave case
3056      - added HeffFile for specifying initial sea-ice thickness
3057      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
3058    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
3059      kpp_transport_t.F, forward_step.F, and the_main_loop.F
3060    o pkg/seaice:
3061      - adjoint-friendly modifications
3062      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
3063    
3064    checkpoint48e_post
3065    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
3066    o dynamics: change definition of computational domain & adapt mom_fluxform
3067      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
3068    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
3069        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
3070        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
3071        global_ocean.90x40x15 global_with_exf global_ocean_pressure
3072        inverted_barometer solid-body.cs-32x32x1
3073      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
3074    
3075    checkpoint48d_post
3076    o in preparation for r*:
3077     a) use pre-computed gradient of hydrostatic potential:
3078        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
3079     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
3080        => affects results of glob_oce_pressure (different truncation error)  
3081      update output.txt of ideal_2D_oce & global_ocean_pressure
3082    
3083    checkpoint48d_pre
3084    o in preparation for r*:
3085      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
3086      pass the 2 comp. of the grad. as arguments to momentum S/R.
3087      but for the moment, only used if it does not change the results.
3088    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
3089    
3090    checkpoint48c_post
3091    Modifications in treatment of initial flux forcing controls
3092    to avoid extra storing of flux fields.
3093    
3094    checkpoint48c_pre
3095    o Added tidal_basin_2d experiment (currently 1D!)
3096    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
3097    
3098    checkpoint48b_post
3099    o r* coordinate added in #ifdef NONLIN_FRSURF block.
3100     (modification to pressure gradient not yet implemented)
3101    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
3102      (for U & V) that are used for vertical advection of momentum.
3103    
3104    checkpoint48a_post
3105    o In preparation for r*, use temp. array to compute vertical transport
3106       in flux-form momentum pkg. => change results of few test-exp.
3107      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
3108                        lab_sea, natl_box & plume_on_slope
3109    
3110    checkpoint48
3111    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
3112    
3113    checkpoint47j_post
3114    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
3115    o moved adexch from forward_step to addummy_in_stepping
3116    o added exch in ctrl_map_...
3117    o aveFreq.=0. at end of cost_final to avoid overwrite in
3118      reverse checkpointing loop
3119    o Yet more changes in gmredi:
3120      * adgmredi_calc_tensor
3121        avoiding all recomputation of gmredi_slope_limit
3122      * adgmredi_x/y/rtransport
3123        added flag for excessive storing to avoid recomp. of
3124        u/v/rtans, dTdx/y/z
3125        -> this is not really necessary and very memory-consuming
3126      * adgmredi_slope_psi:
3127        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
3128      * gmredi_slope_limit
3129        re-activated full calculation of taperfct for case 'ac02'
3130    o updating verification/ adjoints of carbon, global_ocean.90x40x15
3131    
3132    checkpoint47i_post
3133    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
3134    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
3135      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
3136    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
3137    o gmredi: fix few bugs.
3138    
3139    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
3140    This will be a good checkpoint to plug into the ecco-branch.
3141    o few modif.'s to get latest version adjointed
3142      (mainly kick out code in ini_linear_phisurf)
3143    o modif's to run adjoint with exactConserv
3144    o case GM_BOLUS_ADVEC should be cleaned
3145      S/R gmredi_slope_psi should be cleaned
3146    o verification/carbon now has exactConserv=.TRUE.
3147    
3148    checkpoint47g_post
3149    o time-average AIM output: becomes independent from statvars time-average
3150      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
3151    o After TAF bug fix:
3152      Tested adjoint of gmredi package.
3153      Tests were done with checkpoint47 rather than with latest
3154      checkpoint47f_post since the latter is broken for the adjoint
3155      verification/carbon/ contains both ADM and TLM gradient checks.
3156    Here they are, before they get changed/lost/stolen.
3157    Mostly modif.'s to fix numerical sensitivities.
3158    Gradient checks OK for
3159    - GM_taper_scheme:
3160      * clipping
3161      * ac02
3162      * linear
3163      * glw91
3164      * dm95
3165      * ldd97
3166    - GMREDI_OPTIONS:
3167      * GM_VISBECK_VARIABLE_K
3168      * GM_NON_UNITY_DIAGONAL
3169      * GM_EXTRA_DIAGONAL
3170      * GM_BOLUS_ADVEC
3171    in conjunction with data.gmredi parameters to be checked in
3172    in a few minutes under verification/carbon/code/
3173    
3174    checkpoint47f_post
3175    Merging from release1_p10:
3176    o modifications for using pkg/exf with pkg/seaice
3177      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
3178        and SEAICE_EXTERNAL_FLUXES
3179      - pkg/exf CPP options EXF_READ_EVAP and
3180        EXF_NO_BULK_COMPUTATIONS
3181      - usage examples are Experiments 8 and 9 in
3182        verification/lab_sea/README
3183      - verification/lab_sea default experiment now uses
3184        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
3185    
3186    checkpoint47e_post
3187    o created a tag prior to creating a branch
3188    
3189    checkpoint47d_post
3190    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
3191      at the bottom boundary had an erroneous half slip boundary condition
3192    o added bottom drag and no slip boundary condition capabilities to
3193      oceanic pressure coordinates code
3194    o added new verification experiment global_ocean_pressure, this experiment is
3195      also described in the tutorial section of the manual
3196    checkpoint47d_pre
3197    
3198    checkpoint47c_post
3199    o Added a verification experiment for a global cubed-sphere ocean run
3200      -  verification/global_ocean.cubed32x32x30
3201      -  uses pkg/therm_seaice and pkg/bulk_forcing
3202    
3203    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
3204    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
3205      when using P-coordinate; only implemented for atmospheric config.
3206    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
3207      NOTES: requires option NONLIN_FRSURF to be "#define".
3208    o update advect_xz/results/output.txt (left from checkpoint44g_post)
3209    
3210    checkpoint47b_post
3211    Merging from release1_p9:
3212    o pkg/seaice
3213      - removed GOTO's and added taf directives
3214      - double precision constants to reduce the g77 (Linux)
3215        to F77 (SGI) differences reported in release1_p8
3216    o tools/genmake
3217      - added SGI options
3218    o verification/testscript
3219      - updated to that of checkpoint47a_post
3220    o verification/global_ocean.90x40x15/input/eedata
3221      - modified for SGI f77 compatibility
3222    o verification/lab_sea
3223      - added description of sea-ice model
3224      - added missing matlab routines
3225      - added test of thermodynamics parallelization
3226    
3227    checkpoint47a_post
3228    o new pkg: aim_v23
3229     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
3230       for now, keep the same surface forcing as before.
3231     - Part-Cell implemented into AIM; check that Heat & Water are conserved
3232     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
3233     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
3234    o add diagnostic of surface correction term in monitor output
3235    
3236    o bulk_force and therm_seaice
3237    - Two packages:  bulk_force (Bulk forcing)
3238      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
3239    - Earlier integration from Stephaine Dutkiewicz
3240      and Patrick Heimbach.
3241    - Two ifdef statements for compile time,
3242       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
3243    
3244    checkpoint47
3245    differentiable version of checkpoint46n_post
3246    o bug fix in quasihydrostaticterms
3247    o * "clean" adjoint code (in terms of extensive recomputations)
3248        can now be obtained for all GMREDI options (i.e. for
3249        - GM_VISBECK_VARIABLE_K
3250        - GM_NON_UNITY_DIAGONAL
3251        - GM_EXTRA_DIAGONAL
3252        - GM_BOLUS_ADVEC )
3253      * However, wrong gradient check problem remains unsolved.
3254      * New CPP options have been introduced for different
3255        tapering schemes
3256    o external_fields_load now part of differentiation list
3257    o pressure needs multiple storing;
3258      would be nice to have store_pressure at beginning or
3259      end of forward_step, e.g. by having phiHyd global (5-dim.)
3260      (NB: pressure is needed for certain cases in find_rho,
3261      which is also invoked through convective_adjustment).
3262    o recomputations in find_rho for cases
3263     'JMD95'/'UNESCO' or 'MDJWF' are OK.
3264    o #define ATMOSPHERIC_LOADING should be differentiable
3265    o ini_forcing shifted to begining of initialise_varia
3266    o Incorporating QNVS line search routines into MITgcm
3267      (this is separate code, and therefore not under pkg)
3268      lsopt/, optim/
3269    o Updated verification/carbon/
3270      - #define GM_VISBECK_VARIABLE_K
3271      - GM_taper_scheme    = 'ldd97'    
3272    
3273    checkpoint46n_post
3274    Merging from release1_p8:
3275    o verification/natl_box:
3276      updating new external_fields_load routine
3277    o New package: pkg/seaice
3278      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
3279      The sea-ice code is based on Hibler (1979-1980).
3280      Two sea-ice dynamic solvers, ADI and LSR, are included.
3281      In addition to computing prognostic sea-ice variables and diagnosing
3282      the forcing/external data fields that drive the ocean model,
3283      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
3284      The implied surface heat flux is then stored in variable
3285      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
3286      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
3287      non-local transport term.  Because this call precedes model
3288      thermodynamics, temperature under sea-ice may not be "exactly" at
3289      the freezing point by the time theta is dumped or time-averaged.
3290      N.B.: fairly large differences in accuracy occur across
3291            different platforms/compilers; comparison between
3292            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
3293            generated output gives:
3294       T           S           U           V
3295      C D M    c        m  s        m  s        m  s        m  s
3296      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
3297      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
3298      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
3299    
3300      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
3301    o GAD:
3302      - generated new common blocks to account for call of
3303        same gad routines with differing traceridentities
3304        (needed to modify tracerIdentity indices in GAD.h)
3305      - generated separate common blocks for case useCubedSphereExchange
3306        (Department of Futurology)
3307      - parameter lists to gmredi_?transport: added tracerIdentity
3308      - added new key indices to tamc.h
3309    o external_fields_load:
3310      - added this routine to TAF list
3311      - needed to make some common blocks global and additional storing
3312        along the same lines as exf package (checkpoint_lev?_directives.h)
3313    o exf:
3314      updated external forcing package
3315      - bug fixes carried over from ecco-branch
3316        (missing OBCS_OPTIONS.h in two routines)
3317      - enable easy to use "no forcing".
3318      - added exf I/O for atmospheric loading
3319      - added exf I/O for runoff data
3320      - transfered scaling between exf <-> MITgcm to exf namelist
3321    o Adding new verification experiment global_with_exf.
3322      This verification experiment is almost identical to the
3323      global_ocean.90x40x15 experiment, except that it uses
3324      the exf (and cal) package instead of the
3325      external_fields_load routine (cf README file).
3326    
3327    checkpoint46m_post
3328    o modified testscript to return -- when there are no lines of "%MON" output
3329    o added new flag "quasiHydrostatic" for QH mode
3330      and new routine quasihydrostaticterms()
3331    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
3332      New routine: mom_u_coriolis_nh()
3333    o fixed sign of non-hydrostatic metric terms in u and v equations.
3334      Depend on correct sign of gravitySign.
3335    o added work.pc* to .cvsignore in aim directories using ifc
3336    o introduced flag for controllin non-hydrostatic metric terms
3337    o removed gravitySign from PARM04
3338    o switched to g77/ifc from pgf77 in aim experiments
3339    
3340    checkpoint46l_post
3341    o made convective adjustment work with pressure coordinates:
3342     - changed the direction of k-loop in convective_adjustment.F for the
3343       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
3344     - adjusted the reference pressure k-index in convective_adjustment.F
3345     - adjusted the convection condition in convect.F (in analogy to
3346       calc_ivdc.F)
3347     - convective_adjustment no longer computes anything on the halos
3348     - removed the warnings about negative salinity from find_rho.F and
3349       find_alpha.F; instead the new routine look_for_neg_salinity, called
3350       at the beginning of find_rho, find_alpha, and find_beta, does a
3351       check of the entire slice, if CPP-option
3352       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
3353    checkpoint46l_pre
3354    
3355    checkpoint46k_post
3356    o fixed the verification/global_ocean.90x40x15 experiment:
3357     - new bathymetry (the world according to A., JMC, and M.)
3358     - new initial fields and forcing fields (*.bin files)
3359     - new POLY3.COEFFS (for the next release one should switch to a full
3360       equation of state: JMD95P or MDJWF)
3361     - fixed several errors and redundancies in the data file
3362     - experiment uses looped cells
3363     - added matlab directory with diagnostic scripts for plotting of output
3364    
3365    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
3366     - read AIM physics parameters from a file (data.aimphys)
3367     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
3368    
3369    checkpoint46j_post
3370    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
3371    o move wVel computation at the end of the time step, in S/R integr_continuity
3372    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
3373    o update timeave pkg for wVel diagnostic.
3374    checkpoint46j_pre
3375    
3376    checkpoint46i_post
3377    o Clean up AIM package (and keep the results unchanged):
3378      include CPP_OPTION and use IMPLICT NONE in all routines ;
3379      declare all the variables _RL ; use _d 0 for all numerical constants.
3380      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
3381    
3382    checkpoint46h_post
3383    o cleaned up the use of rhoNil and rhoConst.
3384      - rhoNil should only appear in the LINEAR equation of state, everywhere
3385        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
3386        and the dynamical equations are all divided by rhoConst
3387    o introduced new parameter rhoConstFresh, a reference density of fresh
3388      water, to remove the fresh water flux's dependence on rhoNil. The default
3389      value is 999.8 kg/m^3
3390    o cleanup up external_forcing.F and external_forcing_surf.F
3391      - can now be used by both OCEANIC and OCEANICP
3392    checkpoint46h_pre
3393    
3394     Added code to convert surface volume flux (fresh water) into
3395     a mass flux when using P coordinates in the ocean (OCEANICP).
3396     Note: It assumes you have set rho0=rhoConst=density of fresh water.
3397    
3398    checkpoint46g_post
3399    o Include a new diagnostic variable phiHydLow for the ocean model
3400      - in z-coordinates, it is the bottom pressure anomaly
3401      - in p-coordinates, it is the sea surface elevation
3402      - in both cases, these variable have global drift, reflecting the mass
3403        drift in z-coordinates and the volume drift in p-coordinates
3404      - included time averaging for phiHydLow, be aware of the drift!
3405    o depth-dependent computation of Bo_surf for pressure coordinates
3406      in the ocean (buoyancyRelation='OCEANICP')
3407      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
3408        Theta, Salinity, and Pressure in the parameter list. This routine is
3409        presently contained in find_rho.F. This routine does not give the
3410        correct density for 'POLY3', which would be a z-dependent reference
3411        density.
3412    o cleaned up find_rho
3413      - removed obsolete 'eqn' from the parameter list.
3414    o added two new verification experiments: gop and goz
3415      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
3416    checkpoint46g_pre
3417    
3418    checkpoint46f_post
3419    o Enable tangent linear (forward mode) gradient checks:
3420      - extended active file handling to g_... files
3421      - added TANGENT_SIMULATION to theSimulationMode
3422      - extended grdchk package accordingly
3423    o added tangent linear setup in verification/carbon/code_ftl
3424    o added adjoint setup in verification/front_relax/code_ad
3425    
3426    checkpoint46e_post
3427    o Added new equation of state -> MDJWF
3428      - EOS of McDougall et al., 2002, JAOT, submitted
3429      - caveat: the equation of state is only valid for a smaller (more
3430        realistic?) range of values than JMD95P/Z and UNESCO
3431      - added masks to the calculation of pressure in store_pressure
3432      - added more check values for density in check_eos (ini_eos.F), some of
3433        the old check values are out of the range of the MDJWF-eos, so don't
3434        expect perfect matches for those
3435    checkpoint46e_pre
3436    
3437    checkpoint46d_post
3438    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
3439      'OCEANICP', also initialised field pressure correctly in ini_eos in the
3440      case of pressure coordinates. eosType='JMD95Z' in
3441      combination with buoyancyRelation='OCEANICP' now causes an error.
3442    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3443      in find_alpha/beta.
3444    checkpoint46d_pre
3445    
3446    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
3447      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
3448    
3449    checkpoint46c_post
3450    o Changes necessary for ocean in p-coordinates
3451     -  Added new buoyancy relation = 'OCEANICP'
3452     -  Added new parameters = gravitySign (this used to be contained inside
3453        the factor dRdZ which I added when we first switched to R coordinates).
3454     X GM/Redi is not compatible (yet)
3455     X bottom drag and no-slip need to be debugged.
3456    checkpoint46c_pre
3457    
3458    checkpoint46b_post
3459    o Added new equation of state -> JMD95Z and JMD95P
3460      - EOS of Jackett and McDougall, 1995, JAOT
3461      - moved all EOS parameters into EOS.h
3462      - new routines ini_eos.F, store_pressure.F
3463    o Added UNESCO EOS, but not recommended because it requires
3464      in-situ temperature (see JMD95)
3465    o Modified formatting for knudsen2.f in utils/knudsen2 and added
3466      unesco.f to be used with POLY3
3467    checkpoint46b_pre
3468    
3469    checkpoint46a_post
3470    o Added (atmospheric) pressure loading
3471      - new field in FFIELDS.h, etc...
3472      - new cpp flag ATMOSPHERIC_LOADING
3473    o Changed hFacC to _hFacC in calc_phi_hyd.F
3474    o Added SHORTWAVE_HEATING to some files for consistency
3475    checkpoint46a_pre
3476    
3477    checkpoint46
3478    further merges from release1_p5
3479    o new ctrl package
3480      - adopted from ECCO environment to enable optimization
3481      - added Eliassen Palm fluxes to controls
3482    o added Eliassen Palm flux controls to gradient check package
3483    o cost package
3484      - Compatible with new ctrl package
3485      - added Eliassen Palm cost hooks
3486      - modif's of existing cost functions
3487    o Adjoint-related bug fixes in kpp:
3488      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
3489      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
3490    o autodiff package
3491      - flow directives:
3492        + new for S/R do_the_model_io
3493        + enhanced for S/R checkpoint
3494        + new gmredi.flow
3495      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
3496        disable adcommon.h/g_common.h by default.
3497      - fixed problem for adjoint of global_max
3498    o modified verification/carbon/
3499    o New setup for adjoint of global_ocean
3500    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
3501    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
3502    o incorporated hooks for sponge layer code (external_forcing.F)
3503    
3504    checkpoint45d_post
3505    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
3506    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
3507      (affects plume_on_slope "cg2d" output)
3508    o add new parameter deltaTfreesurf for free-surface time stepping
3509    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
3510    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
3511    o change phiMin in exp1 (to agree with documentation)
3512    o add new flags:
3513     - T,S forcing inside/outside Adams-Bashforth
3514     - turn off temp,salt advection and/or forcing
3515     - for each tracer, define internal flag for multiDimAdvection & A-B
3516    o monitor: change definition of KE to check conservation of Energy
3517    
3518    checkpoint45c_post
3519    o Removed f90 comments ("!")
3520    o Modified initialisations to enable exf package for MITgcm
3521      (without invoking ECCO_PACKAGE).
3522    o modifications to gradient check package (Martin Losch)
3523      - enable centered differences
3524      - modified format of standard output
3525    
3526    checkpoint45b_post
3527    o cleaned exchange calls in cg2d
3528    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
3529    o included CPP option SINGLE_LAYER_MODE in thermodynamics
3530      to configure barotropic setup (Martin Losch)
3531    o moved some initialisations within bi,bj loop in dynamics
3532      (TAF flow dependency)
3533    o in initialise_varia, moved call packages_init_variables
3534      before convective_adjustment_init
3535      (corresponding adjustment of TAF tape initialisation).
3536    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
3537    
3538    checkpoint45a_post
3539    o compute Rho over the whole domain (extend iMin,jMin indices)
3540    o specific exchange for X-slice domain (case Ny=1)
3541    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
3542    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
3543    
3544    checkpoint44h_post = checkpoint45
3545    o Fix to restore differentiability:
3546      place at which packages_init_variables is called in
3547      initialise_varia is crucial for reverse control flow.
3548    o modifications in GMRedi to enable stable adjoint
3549      (corresponding modif's in thermodynamics, dynamics)
3550    o added missing hook for sponge layer code in external_forcing
3551    o modified test cost functions
3552    o storing in gad_advection (plus removal of write(0,*)!
3553    o missing headers TR1.h added in convective_adjustment routines
3554    o errorMessageUnit set non-equal zero in eeboot
3555      (conflict on some platforms, e.g. IBM SP3)
3556    o modified carbon verif.
3557    
3558    checkpoint44h_pre
3559    o vertical grid option: allow to put the Interface at the middle between
3560      2 cell-centers ; replace delZ in pkg/kpp by drF.
3561    o GM Advective form: Tracers are advected using the residual transport (=
3562      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
3563    
3564    checkpoint44g_post
3565    o fix surface correction term in multiDimAdvection (affects plume_on_slope
3566      results) ; ifdef missing in thermodynamics.F
3567    
3568    checkpoint44f_pre,checkpoint44f_post
3569    o added PTRACERS package
3570      This allows an arbitrary number of passive tracers to be integrated
3571      forward simultaneously with the dynamicaly model.
3572      + Implemented so far:
3573        - basic forward algorithm (time-stepping, advection, diffusion, convection)
3574        - I/O and checkpointing
3575        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
3576      + Not implemented so far:
3577        - KPP
3578        - OBCS
3579      + No specific example supplied (yet) but global_ocean.90x40x15 has the
3580        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
3581        line in data.pkg.
3582      + This package is disabled by default since it increases storage.
3583    
3584    
3585    o testscript: added -cleanup option
3586    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
3587                 b) enable to filter 2D fields.
3588    
3589    checkpoint44e_pre,post
3590    o re-wrote convective adjustment to use pre-calculated weights
3591      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
3592      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
3593      Original calls to convect() still in place.
3594    
3595    chkpt44d_pre,post
3596    o added missing EXCLUDE_MONITOR flags
3597    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
3598      (incompatible typ in MIN/MAX expressions caused problems
3599      on IBM SP3)
3600    o in genmake added variable MAKEDEPEND
3601      plus resetting for case SunOS
3602    o added timer_stats.c routine for IBM SP3
3603    o removed variables in dynamics
3604    !!! I forgot to create tag chkpt44d_pre !!!
3605    !!! But chkpt44d_pre = chkpt44c_post    !!!
3606    
3607    o real fresh water flux implemented with non-linear free-surface.
3608    
3609    chkpt44c_pre,post
3610    o few fix (mask in shap_s2, EmPmR in external_field_load,
3611      USE_NATURAL_BCS in solve_for_P);
3612    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
3613    
3614    checkpoint44b_pre/_post
3615    o merge of relevant stuff from the ecco-branch:
3616      - genmake: removed $S64 overwrite for case SunOS
3617      - pkg/exf: update and corrections for field swapping and obcs
3618      - pkg/ecco: parameter lists for the_model_main, the_main_loop
3619                  harmonized between ECCO and MITgcm
3620      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
3621                      updated checkpointing_lev... lists for obcs
3622      - model/src: minor changes in forward_step, plot_field
3623                   added directive for divided adjoint in the_main_loop
3624      - pkg/mdsio: added mdsio_gl_slice
3625    
3626    o check parameters & config (chkpt44a_pre,post)
3627    o OBC and NonLin_FrSurf.
3628    
3629    checkpoint44
3630    o fix bug in mom_vi_del2uv
3631    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
3632    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
3633    o update AIM experiments (NCEP input files)
3634    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
3635    o added some stuff for AD
3636    
3637    checkpoint43
3638    o added two new advection tests
3639    o added global 4x4 degree ocean test
3640    o added test of H&S94 with free surface on cube
3641    o some final mods for gradient check, adjoint,...
3642    
3643    checkpoint42
3644      Fixed AD-related problems:
3645    o Store directives up-to-date with re-arranged Adams-Bashforth
3646      (mainly thermodynamics.F)
3647    o New store directives for multi-dim. advection schemes
3648      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
3649      * new common block and key passkey
3650      (mainly gad_advection.F)
3651    o Modified store directives for split of dynamics/thermodynamics
3652      for the case ALLOW_KPP
3653    o Cleaned argument list for timestep_tracer.F
3654    
3655    checkpoint41
3656    o re-formatted/added comments in prologues of key subroutines
3657      to work with protex
3658    
3659    checkpoint40
3660    o moved calc_gs, calc_gt and calc_tr1 back to model/src
3661    o added FLT (floats) package from Arne along with demo. experiment
3662    o re-arranged Adams-Bashforth scheme for tracers to allow easier
3663      implementation of forward-in-time forcing terms
3664    o more mods for non-linear free-surface including new variable
3665    o modified multi-dim method to work on cube
3666    o bug fix in KPP (from DM)
3667    
3668    checkpoint40pre9
3669    o added DST advection schemes
3670    o fix MPI bug on SGI's
3671    o modifications for non-linear free-surface
3672    o fixed conditionals for fixed flow/passive tracer only mode
3673    o added tension/strain form of stress tensor
3674    o changes to commenting of arguments for TAF/TAMC
3675    o added/updated many matlab scripts
3676    o added multi-dimensional advection method for tracers
3677      
3678    checkpoint40pre8
3679    o new package rw/
3680      Added method for dumping intermediate local arrays:
3681      mdsio_writetile - same as mdsio_writefield except works from inside
3682                        bi,bj loop
3683      mdsio_writelocal - same as mdsio_writetile except works for local
3684                         arrays
3685      write_local_r? - higher-level wrapper for mdsio_writelocal
3686      Controlled by diagFreq. Defaults to zero (ie. no dumps)
3687      Example given at end of mom_vecinv.F that dumps some local arrays.
3688    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
3689      control flux-form versus vector invariant code.
3690      Switch is runtime flag vectorInvariantMomentum (defaults to false)
3691      or genmake -DISABLE ...
3692    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
3693      (additional storing is now needed for case vecinv;
3694      currently nothing implemented to switch this storing off
3695      in case fluxform is used since no CPP flag available).
3696    
3697    checkpoint40pre7
3698    o bug fix in dynamics.F
3699      calc_viscosity called before k=1,Nr loop.
3700    o added some #ifdef's ALLOW_PASSIVE_TRACER
3701    o cleaned initialisations in ctrl_map_ini
3702      related to TAF
3703    
3704    checkpoint40pre6
3705    o split dynamics into thermodynamics & dynamics
3706    o corresponding split of calc_diffusivity into
3707      calc_diffusivity, calc_viscosity
3708      (kpp_calc_diff, kpp_calc_visc).
3709    o Added diffkr, kapgm to control variables
3710    o bug fix in gmredi_slope_limit for ldd97
3711    
3712    checkpoint40pre5
3713    o proper initialization of Adams-Bashforth time stepping
3714      + uses forward step for very first step of model (iter=0)
3715    o re-generated *all* output since almost all output is modified by this
3716      change (sorry but we've been putting this one off for about 2 years)
3717      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
3718        *not* regenerated since they are already out of date and I don't
3719        want to create the impression that they are suddenly working.
3720    o removed KAP stuff for DEC's
3721    o modified/added many .cvsignore files in */code and */input
3722    o added new expt "solid-body.cs-32x32x1"
3723      + this uses an alternative form of ini_curvilinear_grid.F which
3724        is not necessarily any better than the current one...
3725    
3726    checkpoint40pre4
3727    o added re-initialisations of utrans,vtrans,rtrans in
3728      calc_common_factors which are crucial for TAF.
3729    o extended iMin,jMin range for calc_common_factors,
3730      calc_diffusivity
3731    o added option ALLOW_PASSIVE_TRACER
3732    o a few minor updates and fixes
3733    
3734    checkpoint40pre3
3735    o created calc_gtr1.F for gad package
3736    o split the_main_loop and re-introduced forward_step
3737    o some recomputations of nIter0 for TAMC
3738    
3739    checkpoint40pre2
3740    o Updated to latest branch of AJA, JMC
3741    o Added gradient check package
3742    o Added routines for passive tracer handling
3743    o Added carbon sequestration sensitivity experiment
3744    
3745    checkpoint39
3746     o Modifications and fixes to support TAMC
3747       (mainly missing or wrong directives)
3748     o Corrected common blocks when fooling TAMC to produce adjoint I/O
3749       in addummy_in_stepping
3750     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
3751     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
3752     o Included following packages:
3753       cal: calendar
3754       exf: external forcing
3755       ecco: essential routines to control use of cal, exf
3756             (NB: this is not the full ECCO environment)
3757     o disabled some packages by default in genmake
3758    
3759    checkpoint38
3760     o see notes_c37_adj.txt
3761     o corrected wrong layer index in external_forcing_t
3762     o replaced the_main_loop/forward_step by the_main_loop
3763     o removed forceoutput from write_state
3764       (replaced criteria for initial/final state)
3765     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
3766    
3767    checkpoint37
3768     o mdsio.F routine split and packaged in pkg/mdsio
3769       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
3770        used unless genmake -disable=mdsio)
3771     o allow a more precise surface-geopotential gradient for the atmosphere
3772       taking into account the change in space of Alpha (=1/rho) at the surface.
3773     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
3774       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
3775     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
3776       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
3777       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
3778     o Time-Average diagnostics defined as a pseudo package "timeave".
3779     o pickup files : old pickup (before c35) did not work with new code (c35
3780       and after) unless activating 2 commented lines in initialise-varia.
3781     o Non-Hydrostatic pickup file Pb fixed.
3782     o bug with Rigid-lid version (since c35) fixed.  
3783    
3784    checkpoint36
3785     o implement Crank-Nickelson barotropic time-stepping
3786     o recover Time-Average diagnostics
3787     o fix Pb in checkpoint (PR#19)
3788     o AIM become a standard package ; clean unused CPP_kees
3789    
3790    checkpoint35
3791     o subtantial rewrite of dynamics.f
3792     o allows staggered time-stepping
3793     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
3794     o added bottom drag (linear + quadratic)
3795    
3796    checkpoint34
3797     o Modified exchange routines for correct reverse simulation.
3798     o Added verification output to comply with bug fix in impldiff.F
3799       as of c33 (exp2, natl_box).
3800     o Corrected store directives in dynamics.F
3801     o Corrected array boundaries in impldiff.F
3802     o Corrected array dimensions in gmredi.
3803       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
3804     o Added routine GLOBAL_SUM_INT to global_sum.F
3805     o Added mdsio_gl.F for ECCO purposes.
3806    
3807  checkpoint33  checkpoint33
3808   o Fixed bug in lower BC in impldiff.F   o Fixed bug in lower BC in impldiff.F
3809   o Fixed confusion about units of forcing arrays in FFIELDS.h   o Fixed confusion about units of forcing arrays in FFIELDS.h

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