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revision 1.519 by heimbach, Thu Jul 28 14:35:47 2005 UTC revision 1.1018 by jmc, Sun Aug 24 22:03:51 2008 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7  o adding precip control xx_precip  o add option ALLOW_ADDFLUID and run-time selector "selectAddFluid"
8  o moved ptracer ctrl index 17 -> 32    to add mass source/sink of fluid in the interior (3-D generalisation
9      of oceanic real-fresh water flux).
10    o pkg/monitor: fix recip_dr argument in mon_advcflw2 call (-> advcfl_W_hf_max)
11    o vermix test experiment: switch from LINEAR EOS to MDJWF (not tested before)
12    o new pkg: down_slope
13      density-driven downsloping flow parameterisation (Tellus, 1999, 412-430).
14      - presently, modify T & S inland (dwnslp_calc_rho.F).
15        can be avoided if rho was stored in common bloc and used in calc_phi_hyd.
16      - implementation for ocean in P-coords not tested.
17      - add secondary test to global_ocean.90x40x15 (input.dwnslp) to check this pkg.
18    o move kSurfC,kSurfW & kSurfS from SURFACE.h to GRID.h (next to kLowC)
19      (to facilitate conversion of oceanic pkg to p-coordinate).
20    o change FIND_RHO to FIND_RHO_2D :
21      pass arguments tFld & sFld as local (tile) 2D-arrays ; +fix EOS_CHECK.
22    o new pkg: cheapaml
23    
24    checkpoint61b
25    o exch2:
26      change index bounds in rx2_cube exchanges (new S/R: EXCH2_GET_UV_BOUNDS)
27      - no longer depend on the order sequence (N,S,E,W).
28      - 3rd exchange no longer needed (tested with 24 tiles).
29      - same modif to hand-written adjoint S/R (global_ocean.cs32x15: zero diff)
30      - exch_UV_A-grid readily available (but not yet tested).
31      comment out 3rd exch call and remove copy of V to U at SE & NE face-corners
32      (both are no longer needed) in exch_uv: no effect in forward run; but
33       get truncation error differences with adjoint exch.
34    o exch2:
35     - change index-bounds storage (moved from target to local tile,
36       more intuitive this way) ; rename/remove some variables.
37     - change utils/exch2/matlab-topology-generator & code_mods accordingly.
38    
39    checkpoint61a
40    o exch2/matlab-topology-generator:
41      fix bug in index bounds for N-S internal exchange (hard to tell if this
42      had any effect on the solution).
43    o pkg/mnc: small fix in mnc_handle_err: make sure that length of msgbuf
44      is exceeded
45    o testreport: modify syntax of awk, so that it works also with
46      awk, and not only with nawk and gawk
47    
48    checkpoint61
49    o autodiff
50      Change default for TAF usage by removing argument '-nonew_arg'
51      This changes TAF subroutine argument list (ordering of active var.)
52      Omission of this flag leads to incompatibility w.r.t. TAMC
53      To restore TAMC-compatibility, need following modifs:
54      * use adoptfile tools/adjoint_options/adjoint_tamc_compatibility
55      * use CPP option #define AUTODIFF_TAMC_COMPATIBILITY
56      Tested TAF version is 1.9.22
57      N.B.: exch2 hand-written adjoint code currently not TAMC compatible
58    
59    checkpoint60
60    --->>> This is the last checkpoint for which generating the adjoint
61    --->>> is done via the TAMC-compatibility TAF-flag "-nonewarg"
62    --->>> by default.
63    --->>> Future checkpoints will ommit this flag by default.
64    o pkg/generic_advdiff, os7mp: simplify and avoid division by zero.
65    o pkg/grdchk: Add gradient check to etan0 perturbations.
66    o pkg/exf: read ice area from file (#ifdef ALLOW_ICE_AREAMASK).
67    o pkg/autodiff: more flexibility in zeroadj.
68      model/src: modifying do_oceanic_phys.F accordingly.
69    o pkg/ctrl: Bounds for (kapgm,kapredi,eddypsi) parameter estimation.
70    o model/src and pkg/gmredi: GMREDI_WITH_STABLE_ADJOINT CPP option
71      special setup of gmredi for which the adjoint is stable
72      enough for parameter optimization.
73    o bridging the gap between eddy stress and GM.
74      -> eddyTau is replaced with eddyPsi (eddyTau = f x rho0 x eddyPsi)
75          along with a change in CPP option (now ALLOW_EDDYPSI).
76      -> when using GM w/ GM_AdvForm:
77          The total eddy streamfunction (Psi = eddyPsi + K x Slope)
78          is applied either in the tracer Eq. or in momentum Eq.
79          depending on data.gmredi (intro. GM_InMomAsStress).
80      -> ALLOW_EDDYPSI_CONTROL for estimation purpose.
81      The key modifications are in model/src/taueddy_external_forcing.F
82      pkg/gmredi/gmredi_calc_*F pkg/gmredi/gmredi_*transport.F
83    
84    checkpoint59r
85    o new S/R (pkg/mdsio/mdsio_facef_read.F) reading of sNx+1 x sNy+1 array
86      from per-face file (take S/R READSYMTILE_RS out of ini_curvilinear_grid.F);
87      fix option to read coriolis(@ cell-corner) from files with CS-grid.
88    o pkg/mnc: add some attributes to standard 1D-coordinate variables
89    o pkg/diagnostics: enforce missing_value attribute for scalar variables at
90      mass points, when using mnc for output
91      - add runtime parameter (missing_value, missing_value_int) to override
92        default (which is the value of getcon('UNDEF'))
93    o pkg/mnc: prepare mnc for the actual use of missing values with the
94      diagnostics package: small fix in mnc_cw_readwrite.template and more
95      initialisation of never used fields
96      - replace mnc_common.h and mnc_id_header.h with corresponding upper case
97      versions
98    o pkg/thsice/thsice_ini_vars.F added default initial values so that
99      thermodynamics sea ice solver does not blow up when some initial fields
100      are missing.
101    o move from external_forcing_surf.F to ini_forcing.F
102      the p-coord. hack consisting in using pLoad to set phi0surf ;
103      update output of tutorial_global_oce_in_p (affected @ truncation level).
104    o Freshen up a bit hs94.1x64x5, notably:
105      remove rotationPeriod and tRef=5*0. (adjoint only), and add
106      exactConserv=.TRUE.
107    o pkg/generic_advdiff:
108      change option GAD_ALLOW_SOM_ADVECT to GAD_ALLOW_TS_SOM_ADV which only
109      applies to files where Temperature & Salinity 2nd Order moments are used.
110    o pkg/ptracers: add second-order moment advection schemes (80 and 81);
111      this uses a dynamically allocated internal state data structure
112      (#define PTRACERS_ALLOW_DYN_STATE in PTRACERS_OPTIONS.h)
113      and requires a fortran 90 compiler
114    
115    checkpoint59q
116    o pkg/mom_vecinv: Add energy & enstrophy conserving scheme (selectVortScheme=3)
117       (from Sadourny, described by Burridge & Haseler, ECMWF Rep.4, 1977)
118    o Refresh tutorial_global_oce_biogeo, notably:
119      - change bathymetry (put back seamounts in ACC, use hFacs)
120      - change EOS (POLY3 --> JMD95Z)
121      - use Bryan-Lewis vertical diffusivity
122      - use multidimensional advection
123      - remove old virtual virtual in dic pkg, now done through ptracer pkg
124      - change a couple of parameters in dic pkg
125    o pkg/ctrl: change formula in adctrl_bound.F and add a parameter to ctrl_map_ini_gen.F
126    o pkg/obcs: change default to OBCSfixTopo = .true.,
127      - set OBCSfixTopo=.false. in exp4/input/data.obcs to reproduce old result
128      - replace "debugMode" with "debugLevel .GE. debLevB"
129    o implementation of TAF directives for gchem,cfc,dic
130    o remove "exp5" (replaced by tutorial_deep_convection).
131    o pkg/obcs: add code to fix topography gradients normal to open boundaries;
132      this requires computing the index fields OB_Jn/Js/Ie/Iw in obcs_readparms;
133      the code can be turned on by setting OBCSfixTopo = .true. in data.obcs
134      --> changes results in exp4, seaice_obcs
135    o tutorial_deep_convection :
136      update the set-up and increase resolution and domain size ; start
137      from pseudo initial conditions = output at t=120mn in order to see
138      something happening when running testreport.
139    o pkg/seaice: add os7mp as an advection scheme
140                  add check for advection schemes
141                  add a flag for restoring T and S underneath sea ice
142    o pkg/my82: add netcdf-support and diagnostics
143    o thsice pkg:
144      - Now hsMax limits snow height by turning it into ice following
145        flooding scheme (and now conserving energy)
146      - Slight rewriting of the formula in thsice_calc_thick.F
147      - Parameter rhowi eliminated to be replaced by floodFac = (rhosw-rhoi)/rhos
148      --> changes results of global_ocean.cs32x15.icedyn and global_ocean.cs32x15.thsice
149    
150    checkpoint59p
151    o gchem / dic / cfc :
152      - add useDIC, useCFC , read from "data.gchem" (& hold in GCHEM.h);
153      - add new parameter files: "data.dic" & "data.cfc" ;
154      - various re-arrangement in initialisation & header file ;
155      - fix tutorial_global_oce_biogeo for multi-threaded test.
156    o pkg/dic: test for "pickup_dic" file when restarting ;
157      if no pickup-file, can restart with a re-initialised pH (same as it did
158      before) providing pickupStrictlyMatch is set to False.
159    o change argument list of S/R PTRACERS_WRITE_PICKUP & MYPACKAGE_WRITE_PICKUP
160      + fix call to S/R GGL90_WRITE_PICKUP & DIC_WRITE_PICKUP
161    o add a "warning" (to Error msg file) when an Active Tracer is not using AB-2
162      and staggerTimeStep is off (needed for stability of Internal-wave dynamics).
163    o move out of PARAMS.h & data the last pieces of old-ptracer code: tauTr1ClimRelax,
164     & lambdaTr1ClimRelax ; put those 2 params in PTRACERS_PARAMS.h & data.ptracers
165       (note: not clear to me what lambdaTr1ClimRelax is still used for ...)
166    o pkg/mom_vecinv: - new parameter "selectVortScheme" to select which
167       scheme to use for vorticty-term ;
168     - compute upwindVorticity=T case within mom_vi_u/v_coriolis_c4.F
169       (with default selectVortScheme, return to original discretisation)
170     - remove weird combination (e.g.: upwindVorticity & highOrderVorticity)
171    o pkg/seaice: add a line to the summary to indicate grid type (B/C)
172    o in mom_calc_visc, fix average value of viscAh_W & viscA4_W next to the
173      bottom ; only used with variable horizontal viscosity and non-hydrostatic.
174      also fix diagnostics VISCAHW & VISCA4W.
175    
176    checkpoint59o
177    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
178    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
179      move a few statemens out the main loop into separate loops
180    o pkg/shelfice:
181      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
182        (kg/m^2/s), does not break tests, because in verification/isomip,
183        rhoConstFresh=rhoConst (by accident)
184      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
185      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
186        new file model/src/seawater.F, so that they are available for all pkgs.
187      - convert potential temperature into in-situ temperature. This changes the
188        isomip tests => update tests
189    o add a flag writePickupAtEnd (default=true) to be able to suppress
190      writing a pickup at the last timestep
191    o tools/mpack-1.6 :
192      - disable automake (not working) and autoconf (not needed).
193      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
194        also cleaner with much less compilation warnings.
195    o pkg/profiles:
196      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
197      (for "less than 32 characters name" compiler requirement)
198    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
199      conditions that have a different sampling frequency than S/T/U/V obcs
200    o pkg/diagnostics (stats-diags):
201      - fix global Min/Max in case 1 processor get only empty tiles
202    o genmake2: replace (4 times)
203         make genmake_tc_1.o >> genmake_warnings 2>&1
204      with
205         COMM="$CC $CFLAGS -c genmake_tc_1.c"
206         echo $COMM >> genmake_warnings
207         $COMM >> genmake_warnings 2>&1
208      to make genmake2 always see the value of CC as specified in the optfile.
209    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
210      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
211      - modify verification advect_cs test to test SOM-advection on CS-grid.
212    o pkg/ctrl:
213      - Rewrite of ctrl_map_ini_ecco.F,
214        introducing a generic routine (ctrl_map_ini_gen.F).
215      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
216    
217    checkpoint59n
218    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
219      number in dedicate array "hdiag":
220      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
221        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
222      - many small changes (integer format) for large number of diagnostics
223      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
224        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
225    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
226      usingSphericalGrid, this allows to define the rotated grid coordinates
227      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
228      geographical coordinates according to the inverse of the rotation defined
229      by the Euler angles, so that Coriolis parameter and online-interpolation by
230      exf works with the geographical coordinates on XC/YC/XG/YG.
231      Naturally, this feature does not work with all packages, so some
232      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
233      profiles), because there the coordinates are assumed to be regular
234      spherical grid coordinates.
235    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
236      - introduce isopycnal diffusion coefficient control.
237    o tools/adjoint_options:
238      - additional control vector components.
239    o pkg/mnc: have mnc create marginally meaning full coordinate variables
240      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
241    o pkg/mypackage:
242      - add example of read/write pickup for state-var ;
243      - add entry points to the main code for state-vars diags & write-pickup.
244    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
245      transitions for useExfYearlyFields
246      - add new subroutine that determines the file to read from for
247        use*YearlyFields = .TRUE. and .FALSE.
248      - add a verification experiment to global_with_exf that tests
249        useExfYearlyFields with USE_EXF_INTERPOLATION defined
250    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
251      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
252      subroutines (which could be generated from a template, because they are
253      almost identical), for now they are included in obcs_prescribe_read.F for
254      simplicity
255    o pkg/exf:
256      - add a little more diagnostic to exf_interp_read (in analogy to
257        mds_read_field, can be turned off with debugLevel < debugLevA=1)
258      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
259        ugly but fast by unrolling short inner loops, inserting a unroll=8
260        directive in routine lagran, and splitting a loop and making do while the
261        outermost loop (the latter requires the intoduction of index arrays)
262    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
263    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
264      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
265    o verification/seaice_obcs: updated for restart test and latest options
266    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
267      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
268      for now this is only available for the C-grid code and also within
269      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
270    
271    checkpoint59m
272    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
273      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
274    o gad_som : fix flux output (& diagnostics) to have same units as other  
275      advection scheme fluxes (was previously multiplied by deltaT).  
276    o added verification/seaice_obcs both to test seaice open boundaries
277      and to provide an example matlab scrpt for generating them
278    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
279    o pkg/salt_plume: clean up salt_plume_frac.F to
280      remove redundancy in PlumeMethod 1 and 4
281    o pkg/kpp: added saltplume diagnostics
282    o pkg/obcs and pkg/seaice:
283      - do not set uice and vice to zero when OB*icefile are unspecified
284      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
285      - moved seaice tracer obcs after call to seaice_growth
286    o pkg/salt_plume: added various options for salt plume depth
287      criterion and for vertical distribution of the salt
288    
289    checkpoint59l
290    o pkg/ptracers: new version of ptracers pickup:
291      read meta file and write only fields which are needed to restart.
292      ( same logic as main pickup file ; also using pickupStrictlyMatch )
293    o pkg/seaice:
294      - add timescale for melting due to warm mixed layer as a means of
295        setting SEAICE_availHeatFrac more conveniently
296      - add a CPP-flag/runtime parameter check for flooding algorithm
297      - reformulated availHeat in seaice_growth.F to be independent of AREA
298    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
299      unit changes
300    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
301    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
302      SX vector computer.
303    o pkg/seaice:
304      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
305        seaice forcing fields can now be read only through pkg/exf
306      - removed some unused halos
307    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
308    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
309      or U/VICE from U/VWIND before computing U/VSTRESS
310    
311    checkpoint59k
312    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
313      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
314    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
315      all experiments pass when compile with un-initialised var. checking option.
316    o added pkg/salt_plume
317    o script to test restart (for now, in MITgcm_contrib/jmc_script)
318    o pkg/seaice: new read/write pickup version.
319      read meta file and write only fields which are needed to restart.
320      ( same logic as main pickup file ; also using pickupStrictlyMatch )
321    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
322    o lab_sea.hb87: modify the domain & update output.hb87.txt :
323      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
324      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
325      process. Fixed here by closing the domain at the Northern boundary.
326    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
327    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
328      a set of consecutive levels in/from a 3-D array.
329    o pkg/ptracers:
330      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
331      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
332    
333    checkpoint59j
334    o in pkgs: dic, obcs, offline, rbcs:
335      standard way to compute coeff. for time interpolation between 2 time reccords
336      which retains full precision (& make results less dependent on compiler).
337      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
338    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
339      packages instead of reading ice cover and wind speed separately
340    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
341     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
342      to allow to compile customized code before the update)
343    o cleaning-up:
344      - fix CPP instruction syntax in pkg/obcs
345      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
346        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
347      - fix some threads issue in IO parts.
348    o pkg/dic:
349      - add tons of "_d 0" (--> much better testreports !)
350       and then update outputs of tutorial_global_oce_biogeo
351    o pkg/mom_fluxform:
352      add a special version of momentum advection intended to conserve momentum
353      next to a bathymetry step or a coastline edge. (default = off = #undef)
354    o new read/write pickup version:
355      - for now, only implemented for main (mdsio) pickup file.
356      - write out only what is needed to restart; merge pickup_nh , pickup_ph
357        and main pickup together.
358      - read meta file; read only what is needed to restart; stop if a field
359        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
360        if it make sense (even if the restart is not perfect).
361      - if no meta file, assume that pickup to read corresponds exactly to
362        a pickup that would currently be written.
363      - read pickup written in the old format (until checkpoint59i) if it
364        recognizes an old meta file (no field-list).
365      - add a meta file in exp. which starts from a pickup: 2 cases:
366        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
367         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
368        b) a meta file describing the content of the associated pickup file
369         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
370    o pkg/mdsio & pkg/rw:
371      - new routine to read a meta file ; new set of routine to read
372        Multiple-fields file (with meta file).
373    o added open boundary conditions capability for seaice
374        HSNOW, HSALT, UICE, and VICE
375    
376    checkpoint59i
377    o adjoint:
378      * fix multiDimAdvection adjoint
379        (partial recomputation problem by TAF for fVerT(:,:,kDown)
380        and comlev1 size definition (maxpass vs. max. number of tracers)
381      * verification/global_ocean.90x45x15 adjoint now tests
382        NLFS and multiDimAdvection using DST3 (=30)
383      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
384    o pkg/kpp: add "_d 0" to real constant (if missing);
385      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
386      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
387    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
388      for internal parameters related to restart process (formerly from PARAMS.h)
389      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
390    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
391      as argument. (only atm2d & obcs write_pickup have not yet been updated)
392    o pkg/monitor:
393      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
394      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
395      - account for deep Atmosphere factor and density factor (anelastic)
396    o added open boundary conditions capability for seaice HEFF and AREA
397    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
398      thermodynamics
399      - requires a little reorganization, which affects the testreport results
400        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
401        so that now the conservative form is tested
402      - add a few comments
403    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
404    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
405    o add new diagnostics to seaice: advective, diffusive fluxes (only for
406      multidim-advection, for scheme 2 they are not filled) and transports,
407      thermodynamic growth rates
408    o change units of EmPmR (inside the code, + within coupling interface)
409      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
410      Affects results @ truncation level (cg2d match) and update output of
411       experiments: lab_sea(6), global_ocean.90x40x15(10),
412      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
413      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
414      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
415      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
416    
417    checkpoint59h
418    o pkg/exf:
419      - improve vectorization by moving if-statement out of loops in
420        exf_mapfields, exf_radiation
421      - exf_bulkformulae.F: introduce 2D fields and vectorize code
422    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
423    o testreport:
424      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
425        monitor & update offline_exf_seaice exp. output.
426      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
427    o pkg/seaice:
428      - bug fix in the evp solver: boundary conditions were affected be
429        masking of zMax/zMin (changes results)
430      - minor bug fix in boundary conditions in seaice_calc_strainrates
431        (changes results for no_slip)
432      - seaice_lsr.F: make interpolation of eta dependent on boundaries
433      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
434      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
435        stress formulation and no-slip boundary conditions
436    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
437      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
438    o pkg/seaice: a first HSALT time stepping equation has been checked in
439    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
440      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
441      without requiring DO-IF statements
442    o pkg/thsice:
443      use continuous power-law function for partition of energy between lateral
444      melting/freezing and thinning/thickening ; old code using step function
445      still available with #undef THSICE_FRACEN_POWERLAW
446      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
447    o testreport: change AD testing : check against results/output_adm.txt
448      using same scripts as for forward test.
449    
450    checkpoint59g
451    o adjoint testing: in preparation for changing testreport:
452      - output format: cost and grad written on separated lines
453      - ad output results in directory "results" (instead of "results_ad")
454    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
455    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
456    o pkg/ecco: allow user defined cost function contributions
457    o testreport:
458      Allow to choose (per experiment) the list of tested output variables
459       and the main variable (used to issue a pass/FAIL ) ;
460      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
461      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
462      Also modify printing of summary:
463       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
464       b) echo the list of tested variables in the individual summary.txt of
465          each experiment.
466    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
467      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
468      (but still depend on the tile decompostion of the domain).
469    o pkg/seaice: change a discretization detail to make the B-grid code
470      "more symmetric". This change is likely to remove all "ridges/leads" that
471      where quasi-aligned with the grid in B-grid solutions. It may also be
472      the solution to the stress coupling issues with the B-grid.
473    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
474      remove .cvsignore from input dir. (since testreport no longer run here).
475    o pkg/thsice:
476     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
477     - fix reshaping of sea-ice just after advection:
478       melt all the ice only if ice-volume is too small.
479     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
480       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
481     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
482    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
483      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
484    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
485      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
486      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
487      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
488      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
489      -> update output.txt
490    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
491     this affects truncation error: -> update output.txt of exp:
492      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
493      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
494    
495    checkpoint59f
496    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
497    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
498      a bounded range (in forward mode)
499    o pkg/ecco, ctrl, autodiff and mom_common:
500     internal parameter controls, completements of implementations
501    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
502    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
503      (not seem any difference in testing results).
504    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
505       at face corners.
506    o pkg/generic_advdiff:
507     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
508      loop range indices for computing vertical advection tendency
509      and do the calculation in the interior only (no overlap) ;
510      for now, only implemented for SOM advection (to save CPU time).
511     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
512    o exch2 adjoint
513      First set of changes:
514      - add exch2 hand-written adjoint templates
515      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
516        This will require cleanup in pkg/autodiff/*.F
517        (changed routines currently kept separate in verif. code/)
518      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
519        that used to hide exch2 or cubed-sphere specific code
520        (commented via 'cph-exch2')
521    o pkg/seaice
522      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
523    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
524       output of global_ocean.cs32x15.thsice .
525    
526    checkpoint59e
527    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
528      for B-grid vector (not yet tested) and C-grid vector (<- only used
529      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
530    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
531      (#ifdef ALLOW_SALT_PLUME)
532    o gather_2d/scatter_2d: removed halo regions
533    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
534      scheme and the corresponding test case (under front_relax dir). For now,
535      only available with Skew-flux form and not yet tested in realistic set-up.
536      adjoint: store directives updated, but gradient checks deteriorated,
537      so maybe GM/Redi adjoint is now broken.
538    o seaice adjoint
539      * add AREA, HEFF, HSNOW as control variable
540        (should not change lab_sea results)
541      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
542    o pkg/seaice:
543      * added computation of saltFlux in seaice_growth;
544        For time being, sea ice salinity is assumed constant
545        contribution of snow flooding to freshening of sea ice is neglected.
546        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
547        defaults to 0.0 in order to maintain backward compatibility.
548        Typical values for SEAICE_salinity are 4 to 10 g/kg.
549      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
550      * added SEAICE_availHeatFrac, which specifies fraction of surface level
551        heat content used to melt or grow ice
552      * commented out cap of HICE: it helps keep ice thinner
553      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
554      * applied OBCS T/S mask to HEFFM sea ice mask
555    
556    checkpoint59d
557    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
558     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
559     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
560    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
561     and change default value of parameter "GM_Small_Number";
562     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
563       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
564       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
565    o pkg/ecco: cost function when applying pkg/smooth to controls
566    o pkg/ctrl: add forcingPrecond run time parameter
567    o pkg/seaice:
568     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
569     - fix bug in metric terms of u-equation in LSR solver (implicit part),
570       changes verification/lab_sea
571     - rearrange implicit part of u-equation in LSR solver to make it easier to
572       read, understand, and debug. This causes changes at the truncation level.
573     - fix (serious) bug in the boundary conditions (sign error in the implicit
574       part) of the LSR solver. Changes all LSR results.
575     - fixed problem with HSNOW initialization to avoid thick snow when AREA
576       is initilized with small values - does not change lab_sea results.
577     - added HsnowFile initialization capability
578    o pkg/smooth: addition to model/src and pkg/ctrl so allow
579     initialization of pkg/smooth and application to control vector
580    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
581    o dependencies: pkg/profiles requires pkg/cal
582    o pkg/profiles:
583     - added option ALLOW_PROFILES_GENERICGRID
584         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
585         that interpolation information (grid points and coefficients) is provided
586         within the netcdf input files.
587         -> sample matlab scripts can be found in MITgcm_contrib/gael
588         that allow you to prepare netcdf input files.
589     - also modified: cleaner include statements, cleaner error print statements,
590       cleaner stops when error, and more tests of the netcdf input files consistency.
591    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
592    o pkg/seaice:
593     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
594       requires a new routine: seaice_diagnostics_fill.F
595     - make sure that seaice does not move if not forced (pressure replacement
596       method, Hibler and Ip, 1995), changes results
597     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
598     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
599       It is turned off by default (=-1.), because it changes the results.
600     - make it possible to read AREA from a file, too.
601    
602    checkpoint59c
603    o add S/R and diagnostics for oceanic mixed-layer depth
604    o move GMRedi call after all vertical mixing schemes (including KPP)
605    o pkg/thsice:
606     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
607      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
608    o pkg/obcs:
609     - bug fix for balance code
610    o pkg/seaice:
611      - allow values of SEAICE_elasticParm > 1
612      - add new parameter SEAICE_evpTauRelax as an alternative
613        to SEAICE_elasticParm
614      - make lsr boundary conditions free slip (by default), changes result
615      - add code for no slip boundary conditions for lsr
616      - set minimum of zeta to zero (and not 4e8) (changes results)
617      - add a cap on AREA after advecting AREA if seaice_growth is not called
618    o change calculation of Visbeck K:
619      - no longer depend on tapering scheme; instead, compute slope (limited
620        by GM_maxSlope). this is equivalent to what was comuted before with
621        clipping or linear tappering.
622      - fix vertical averaging (wrong by 1/2 level)
623      - leave the old version (but will not be maintained) within
624        #ifdef OLD_VISBECK_CALC / #endif
625      - update output of exp. ideal_2D_oce
626    o change error catch in calc_r_star to improve vectorization
627    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
628      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
629    o adjoint:
630      Re-organized adjoint checkpointing according to Matt Mazloff
631      (but with modifs/completions/cleanups)
632      Storing is now bundled into large arrays to optimized I/O
633      (and second step in cleanup of the_main_loop)
634    
635    checkpoint59b
636    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
637      - export/import (between ocean & coupler) fields needed for ocean DIC.
638    o pkg/seaice:
639      - get rid of three more exchanges seaice_calc_viscosities (required
640        different loop boundaries in seaice_lsr and seaice_ocean_stress)
641      - bug fix in seaice_ocean_stress (update of lab_sea required)
642      - reduce loop boundaries to necessary minimum also in seaice_evp
643      - go back to the old way of computing deltaC/Z as the adjoint likes that
644        better
645    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
646      passive tracer to an Age Tracer) + update output.txt
647    o pkg/exf:
648      - implement A-grid / C-grid selection for wind-stress input files.
649      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
650      for now, in exf_bulk_largeyeager04.F only :
651      - change implementation for case where windspeed + 2. components wind-stress
652        are read-in. AND use rhoConstFresh to convert evap.
653    o pkg/seaice:
654      - use correct EXCH_UV for wind-forcing (on A-grid).
655      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
656        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
657    o pkg/exf:
658      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
659      EXF_INTERPOLATION:
660      - merge global_with_exf/code version of exf_interp_read.F
661        to the main code ;
662      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
663        reading the file ; Important: This options needs to be defined to recover
664        previous code.
665        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
666      - no longer loose real*8 precision along the way when using exf_iprec=64.
667    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
668      - change discretisation of evp-solver in order to avoid another exchange
669        (changes lab_sea) and clean up a little
670      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
671        help the adjoint (this also changes the results slightly)
672      - add a few "_d 0" where they had been missing in seaice_evp.F
673      - cleaning up: remove unused seaice_calc_rhs.F
674    o pkg/exf: some cleaning-up:
675      - change various "constants" into runtime parameters
676      - cleaned-up Large&Yeager04 routine which should eventually
677        replace exf_bulkformulae.F (changed names of S/R and CPP)
678        and merged various ALLOW_ATM_WIND options
679     only used with thsice pkg (in thsice_get_exf.F):
680      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
681        which are used when useStabilityFct_overIce=TRUE (= the default)
682      - change default values of ice & snow emissivity and scale downward LW
683        by ice & snow emissivity.
684    o pkg/thsice:
685     fix few little problems, in thsice_calc_thickn.F:
686      - growth vertically (and not laterally) if iceFrac == iceMaskMax
687      - melt only laterally if hIce < hThinIce (as the comments say)
688      and in thsice_extend.F:
689      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
690      - start to form ice as soon as the minimum ice-volume is reachable.
691     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
692      and cpl_aim+ocn
693    o pkg/kpp
694     - move computation of surface related input fields to KPP into a new
695       subroutine kpp_forcing_surf.F
696     - remove wrong (within bi,bj loops) EXCH calls.
697     - little cleaning (add argument myThid in last position, cvs header ...)
698     - for now, fix conservation problem by exchanging KPPviscAz (may not
699       be the best fix)
700    o pkg/seaice
701     - check for inconsistent evp parameter/cpp-flag combination
702     - remove leftover errIO flat for obsolete name list error handling
703    o OpenAD
704     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
705    
706    checkpoint59a
707    o pkg/seaice: some parameter clarifications and a little bit of clean up
708    o pkg/thsice: rename run-time parameters:
709       himin       -> hIceMin
710       himin0      -> hThinIce
711       hihig       -> hThickIce
712       i0          -> i0swFrac
713       transCoef   -> bMeltCoef
714       frac_energy -> fracMelting
715      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
716       with default values (for now) that do not change the results.
717      remove old version of thsice vars advection in pkg/seaice.
718    o in FFIELDS.h:
719      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
720      - make pLoad & sIceLoad always available (but still only used if
721         ATMOSPHERIC_LOADING is #define).
722    o pkg/kpp: replaced _KPP_RL with _RL
723    o bug fixes for vertical diffusivity computations when both KPP and
724        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
725        are no longer updating the vertical diffusivity array
726        (passed as argument) but are (re-) setting those arrays.
727    o pkg/seaice: fix bug in evp solver, while doing that
728      - change (improve?) discretization of stress computations for both
729        cgrid-lsr and evp solver
730      - add a new routine to compute strain rates
731      - the above changes lab_sea results
732      - add no slip conditions for evp solver (off by default), lsr-version
733        may follow
734      - fix exchange for shear at Z-points (does not change lab_sea)
735      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
736        (to force the user to pick a time step since there is not "safe" way
737        of choosing it)
738      - add principal stress diagnostics
739      - rearrange fields for evp a little to avoid having to call a: too many
740        exchanges and b: exchanges for stress trensor components which we do
741        not have.
742      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
743        of evp, complete rewrite for lsr case (latter is does not yet work
744        in all cases)
745    o pkg/kpp: add code to have mixing in shelf ice caverns
746      - add myThid to all kpp routines (long overdue)
747    
748    checkpoint59
749    o pkg/exf:
750      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
751        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
752      - move exf header files from lower_case.h to UPPER_CASE.h ;
753        add missing cvs Header & Name
754      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
755      - add namelist param. selectStressGridPosition, exf_monFreq
756      - retire many _CLIM routines, and remove data.exf_clim
757        + params moved to data.exf
758        + climsst, climsss now handled by exf_set_gen, i.e.
759          climss?period=0 refers to constant field,
760          climss?period=-12 to monthly forcing
761      - split up namelists in data.exf
762    o pkg/seaice:
763      - remove seaice_exch and seaice_exch_uv
764      - remove superfluous exchange of theta
765      - add myThid to seaice_budget_ocean/ice
766      - add new interface for atmospheric wind forcing (C-grid only)
767        + new routine
768        + two new field (taux, tauy for stress over ice)
769        + removed one global field (DAIRN) for C-grid case only
770    o pkg/thsise
771      - 2nd set of modifs for thsice adjoint in conjunction with exf
772    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
773    
774    checkpoint58y_post
775    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
776      vertical diffusivity, similar to that in MOM4; turned on using
777      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
778      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
779    o Added capability for 3D specification of background vertical diffusion
780      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
781      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
782      "data" file that contains the 3D vertical diffusivity coefficients.
783    o ice dynamics (pkg/seaice) with thsice thermodynamics:
784      - add code within pkg thsice to advect & diffuse sea-ice fields
785      similar to (and will replace) what has been added in  seaice_advdiff.F,
786      but: - conserving Mass, Heat & Salt.
787           - better when using non-linear advection scheme (not yet fully tested)
788           - can also be used in atmospheric set-up (for now, only the diffusion).
789    
790    checkpoint58x_post
791    o IO option for global-file compact format:
792      - add options when generating topology (utils/exch2/matlab-topology-generator)
793      - add I/O capability (pkg/mdsio).
794      - adapt utils/matlab/rdmds.m to read this format.
795      for now long-line format not yet supported by pkg/mdsio (& exch2).
796    o shelfice: add a few diagnostics
797    
798    checkpoint58w_post
799    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
800      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
801      (and replace horiVertRatio in NH code).
802      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
803                         and tutorial_plume_on_slope (sensitive to truncation)
804    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
805      directly to drive seaice model (C-grid only)
806    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
807     - reintroduce computation of wind from stress,
808     - compute tau (in exf_bulkformulae.F) from windstress averaged to
809       mass points to avoid tau = 0
810     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
811    o rdmnc.m: make it work with "global" files created with gluemnc
812    o rdmnc.m : some improvements in dealing with singleton dimension
813      (tested on all testreport mnc output files).
814    o genmake2: disable pkg/profiles if netcdf test fails.
815    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
816    o move call to cal_readparms up to make calendar parameters/variable available
817      to all packages
818    
819    checkpoint58v_post
820    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
821      useDynP_inEos_Zc tested.
822    o pkg/exf: changes to properly interpolate/mask/scale initial fields
823    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
824      and portions thereof.  See read_cs.txt for description and examples.
825    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
826      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
827      following the great-circle arc between those 2 points.
828    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
829      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
830    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
831     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
832     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
833     - still needs work (not working with some options ; efficiency to improve)
834       and serious testing.
835     - use this scheme for temperature & salinity in 2 advection test exp.:
836       advect_xy & advect_xz, respectively.
837    
838    checkpoint58u_post
839    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
840    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
841    o testreport: add option "-skipdir" to skip some test.
842    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
843      momentum calculation.
844    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
845    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
846      remove checkpoint.F and the_correction_step.F (no longer used);
847      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
848    o add option (linFSConserveTr) to correct for tracer source/sink due to
849      Linear Free surface
850    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
851    o pkg/thsice: fix reading mnc-pickups
852    
853    checkpoint58t_post
854    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
855    o pkg/mdsio:
856     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
857       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
858       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
859     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
860     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
861       either MDS_READ_FIELD or MDS_WRITE_FIELD )
862     - new S/R (to replace MDSWRITEMETA), which allows to write more
863       informations (variable names, time ...) to meta files.
864     - modify rdmds.m to give back the meta file content.
865    o pkg/diagnostics: change vertical interpolation to be safer, and more
866       flexible (define p-levels to interpolate to in data.diagnostics);
867      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
868       diagnostic pointer.
869    o pkg/seaice: more cleaning up of seaice_growth, added many comments
870    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
871    o fix multi-category seaice:
872     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
873       SEAICE_MULTICATEGORY
874     - fix short wave heat flux
875    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
876       and allow to use EVP solver. Change forward lab_sea: test both EVP
877       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
878    o Initial check-in of lab_sea adjoint
879      (very similar to natl_box_adjoint/code_seaice)
880      * used C-grid and EVP solver
881      * used KPP, GM/Redi
882      * uses inAdExact=.TRUE.
883      * gradient checks fail for both ADM and TLM
884        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
885        f.d. gradients actually seem more problematic than ADM, TLM gradients;
886        issue is related to forward mismatch between g77 an ifort
887    o pkg/seaice: overhaul of thermodynamics
888     - growth.F and groatb.F are replaced by new routine seaice_growth.F
889     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
890     - move a few global fields out of SEAICE.h into seaice_growth.F and
891       make them 2D (FICE/QNETO/ ...)
892     - remove FO (it is the same as QNETO)
893     - introduce a few local fields to avoid modifying external fields such
894       as atemp, etc.
895    
896    checkpoint58s_post
897    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
898      changed exf_set_gen.F so that
899        genperiod=0 means input file is one time-constant field and
900        genperiod=-12 means input file contains 12 monthly means
901    o CG2D: use pre-computed solver main-diagonal (stored in common block);
902      this affects truncation error ; generate new output file for exp. which
903      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
904        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
905        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
906        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
907        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
908        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
909    o start implementation of deep-atmosphere and anelastic formulation
910    o verification: remove 2nd copy of input files and use script "prepare_run"
911      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
912    o mom_common/vecinv/fluxform: fix a few initialisation isssues
913    o profiles: fix for multithreaded case
914    
915    o diagnostics: rename few diags:
916      s/'PRESSURE'/'RCENTER '/g
917      s/'TICE    '/'oceFreez'/g
918      s/'TAUX    '/'oceTAUX '/g
919      s/'TAUY    '/'oceTAUY '/g
920      s/'SWFLUX  '/'oceQsw  '/g
921      s/DIFx/DFxE/g
922      s/DIFy/DFyE/g
923      and add few ocean-forcing diagnostics:
924      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
925    o modifications to pkg/seaice/growth.F and budget.F, which change results of
926      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
927      as actual snow thickness.  It now refers everywhere to effective snow
928      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
929    
930    checkpoint58r_post
931    o modifications to pkg/seaice/growth.F, which change results of
932      lab_sea experiment: fixes pertain to melting snow over open water, to
933      masking EVAP under sea ice, and to using the correct AREA variable for
934      computations of EVAP, PRECIP, HSNOW, and GHEFF
935    o add ability to read bathy, salt, and theta using MNC (off by def)
936    o add flooding algorithm and advection of HSNOW for pkg/seaice;
937      both are turned off by default and do no change any results
938    o seaice advection with pkg/thsice: a step toward the use of non-linear
939      advection scheme, but #ifdef or commented out for now (requires more EXCH).
940    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
941      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
942      in natl_box (affects results @ truncation level: update output.txt)
943    o multi-threading and IO:
944      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
945      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
946        (needed to work with SingleCpuIO): tested in all verif. exp.
947    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
948      affects the results (but none of the verification test uses this scheme).
949    o Adding some pkg/diagnostics capability to pkg/seaice
950      (will certainly be subject to changes)
951    o ctrl: adding new control variables:
952      lwflux, lwdown, evap, snowprecip, apressure, runoff
953    
954    checkpoint58q_post
955    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
956      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
957      high_res_cube configuration by 4% on Columbia.
958    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
959      add (in global_with_exf/code) a version of EXF_INTERP_READ without
960      dynamical allocation (seems to work in multi-threaded).
961    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
962      single CPU io) so that TAF does not have to see EESUPPORT.h
963    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
964    
965    checkpoint58p_post
966    o obcs: stop if obcs is used with useCDscheme = .true.
967    o shelfice:
968     - fix a sign error so that no slip at shelfice interface works
969     - remove stop for combination non-hydrostatic code and shelfice. That does
970       not mean, that the results are correct, but at least they are numerically
971       stable
972    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
973    o added adjoint exch routined for all exch*3d* routines
974      and updated flow directives
975    
976    checkpoint58o_post
977    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
978      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
979    o change controling S/R for writing pickup file (new S/R do_write_pickup)
980      and clean-up reading/writing of pickup files.
981    o fix local version of read/write pickup (NH part) in rotating_tank/code
982    o simplify EXCH interface:
983     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
984     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
985    o added the regrid package
986    o shelfice:
987     - add a simple boundary layer scheme to reduce noise
988     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
989    
990    checkpoint58n_post
991    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
992       local variable (not in common block).
993    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
994      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
995      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
996        to work with SingleCpuIO.
997    o add "_d 0" to real constant of pkg/cfc subroutines ;
998       update exp. cfc_exemple & tutorial_cfc_offline output files.
999    o multi-threading and IO:
1000      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
1001        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
1002      - barrier before and after reading.
1003      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
1004      - avoid using MDS_WRITELOCAL for LAND pkg output.
1005      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
1006        common-block variables ; Allows multi-threading with master-thread IO.
1007    o change default MAX_NO_THREADS from 32 to 4 ;
1008      and stop cleanly when MAX_NO_THREADS is too small.
1009    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
1010    
1011    checkpoint58m_post
1012    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
1013       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
1014    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
1015       keep global_ocean.90x40x15 (for AD testing) with former secondary test
1016       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
1017    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
1018        add MITgcm_tutorials (= code + all the tutorials)
1019    o ecco, option to compute cost for total ssh (mean+anom)
1020    o consistent with addition of ptracer and ssh in pkg/profiles
1021    o profiles: adding ptracer and ssh
1022    o testreport: change multi-test output-file name
1023      (from output.txt.{name} to output.{name}.txt)
1024    o profiles: now ok for mutli-tiles case
1025    o seaice: add 4 parameters for different advection schemes for area,
1026      (effective) seaice thickness, enthalphy, and snow height. Their default
1027      is the standard parameter SEAICEadvScheme
1028    o calc_gw:
1029     - add cosFacU in zonal viscous flux (harmonic.visc.).
1030     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
1031       of tutorial_plume_on_slope.
1032    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
1033    o calc_gw: true flux-form, account for horizontal grid spacing.
1034      update rotating_tank results, but not plume_on_slope (affected at
1035      truncation level, 11 digits).
1036    
1037    checkpoint58l_post
1038    o calc_gw:
1039     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
1040     - remove side-drag for now (need to fix it); update plume_on_slope results.
1041     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
1042    o commit code to make SST/SSS weights spatially variable
1043      (based on either variable in-situ or variable initial T/S weights)
1044    o pkg/ecco:
1045      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
1046        now based on horizontally varying weights wthetaLev, wsaltLev
1047      * cost_averagesflags now returns year indices in addition to day, month
1048      * sflux balance is performed on annual basis
1049        (sflxumm, sfluxmm2, bal_sfluxmm)
1050      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
1051        including separate counting and multipliers
1052    o pkg/rbcs
1053      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
1054    
1055    checkpoint58k_post
1056    o testreport:
1057     - always build in dir. "build" (if not there, mkdir build instead of building
1058       & running in input)
1059     - run in dir run (if it exists), in build otherwise.
1060     - call prepare_run (if input/prepare_run exists)
1061     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
1062    o pkg/exf modifications to interpolation and rotation routines for more
1063       reasonable treatment of North Pole singularity: for tracers North Pole
1064       value is set to northernmost zonal-mean value, for zonal velocity it is
1065       set to zero, and for meridional velocity it is set to northernmost value.
1066    o pkg/exf/exf_check_range.F
1067     - add tile index to diagnostics and move stop statement to the very
1068       end of the routine.
1069    o pkg/diagnostics: (diagnostics_main_init.F)
1070      define title of isomorphic variables according to the current config.
1071    o pkg/thsice with pkg/seaice dynamics:
1072    - fix domain of computation (interior only, required for exf) and do exchanges
1073    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
1074    o towards a standard way of dealing with multi-threading in MONITOR
1075      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
1076    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
1077       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
1078    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
1079    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
1080    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
1081       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
1082    o tracer advection:
1083     - clean-up and simplify calc_common_factors.F
1084     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
1085       advection subroutine (but still not used within DST advection S/R)
1086    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
1087    
1088    checkpoint58j_post
1089    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
1090      from file (collects calls previously in FORWARD_STEP)
1091    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
1092    o adjoint store dir. adjusted accordingly
1093    o genmake2
1094      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
1095    
1096    checkpoint58i_post
1097    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
1098      on wind stress (SEAICEstressFactor defaults to 1.)
1099    o Total number of Timers is finite (<=40): comment out 2 non-essential one
1100      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
1101    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
1102      on CS-grid: no longer loosing mass.
1103    o exf & curvilinear-grid: no longer modify longitude xC & xG.
1104    o pkg/ggl90: fix sloppy output and fix a bug
1105    o pkg/seaice: added SEAICEuseEVPpickup parameter
1106      - Set to false in order to start EVP solver with
1107        non-EVP pickup files when using SEAICEuseEVP
1108      - fix sign error in diffusion in seaice_calc_rhs
1109    
1110    checkpoint58h_post
1111    * Modifications for bottom topography control
1112      o replace hFacC by _hFacC at various places
1113      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
1114      o add non-self-adjoint cg2d_nsa
1115      o update autodiff support routines
1116      o re-initialise hfac after ctrl_depth_ini
1117      o works for 5x5 box, doesnt work for global_ocean.90x40x15
1118    * Adding verification for 5x5 box (4-layer) bottom topography control
1119    
1120    checkpoint58g_post
1121    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
1122       used for mean seasonal cycle, mean diurnal cycle); add an example
1123       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
1124    o pkg/ggl90:
1125      - add parameter (minimum surface kinetic energy)
1126      - fix bug (avoiding division by zero)
1127    o couple pkg/thsice to pkg/seaice:
1128      - modify advection in seaice to accomodate new scalar fields to be advected
1129      - only muliDimAdection scheme work with seaice/thsice
1130      - mapping of thsice-variables to seaice-variables, back and forth
1131      - does not break the verification experiments, but does not give the
1132        desired results either
1133    o pkg/seaice
1134      - make (default) second order advection a bit less confusing?
1135    
1136    checkpoint58f_post
1137    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
1138      to pkg/seaice):
1139      - new routines thsice_map_exf and thsice_get_exf provide the interface
1140      - add an additional formal parameter to thsice_solve4temp
1141    o pkg/exf:
1142      - add new fields wspeed, snowprecip (to be able to couple to thsice)
1143      - correct Stefan-Boltzmann constant
1144      - new parameter for longwave surface emittance
1145      - separate some stuff from exf_bulkformulae into new routines  
1146        exf_radiation, exf_wind
1147      - add new parameters and constants: longwave emissivity for ocean, ice
1148        and snow, evaporation parameters over ice
1149      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
1150        either wind from stress or stress from wind
1151    o pkg/thSIce:
1152    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
1153    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
1154       and THSICE_CALC_THICKN
1155    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
1156    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
1157      to make debugging easier.
1158    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
1159    o pkg/bulk_force:
1160      - clean-up comments and parameters ;
1161      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
1162    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
1163      generate new output for test-experiment: aim.5l_cs.thSI
1164    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
1165      testreport accordingly
1166    
1167    checkpoint58e_post
1168    o SEAICE_CGRID adjoint done
1169    o R_STAR adjoint implemented.
1170      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
1171      * need to sort out init. of h0facc, etc.
1172    o Make pkg/profile fully independent of ecco,cost, etc. stuff
1173      to be able to use it in pure forward.
1174    
1175    checkpoint58d_post
1176    o upgrade simple test-experiment to tutorial example:
1177     step.1: duplicate the experiment and (step.2) will remove the old copy.
1178      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
1179      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
1180      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
1181      tutorial_global_oce_biogeo    <- copy of dic_example
1182      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1183      tutorial_plume_on_slope       <- copy of plume_on_slope
1184      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1185      tutorial_global_oce_optim     <- empty for now (David ?)
1186      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1187     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1188    o correct a sign problem in cost_scat.F
1189    o obcs and ptracers: fix boundary conditions for advections schemes
1190      with larger stencil
1191    o thsice adjoint: start
1192    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1193      completeness
1194    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1195      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1196    o ptracers adjoint:
1197      * avoid extensive recomputatations
1198      * fix missing re-init. of gptr (missed by TAF)
1199    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1200      me to turn off the excessive output to STDOUT that this package produces
1201    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1202      and add those terms in Vector-Invariant formulation.
1203    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1204      if the control period (xx_hfluxperiod etc) is 0
1205    o in profiles pkg, clean routines and fix details
1206    o in ecco pkg, reading ssh data:
1207      fix problem in case the model does not start at iter0=0
1208    o fix mnc-pickup/restart for ptracers
1209    o new package prifiles:
1210      code to compute profile-based cost by Gael Forget
1211      (modifs in ecco, ctrl, autodiff)
1212    o Benign bug fix in initialization (spotted by M. Mazloff) of
1213      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1214    
1215    checkpoint58c_post
1216    o adjoint: finish NLFS adjoint and provide reference output in
1217      verification/global_ocean.90x40x15/results_ad_nlfs
1218    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1219      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1220      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1221      with SEAICE_CGRID defined.
1222    o move calendarDumps from "data" to "data.cal" and clean-up the code
1223      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1224    o add useEXF & useCAL flags (for now, set in hard-coded way)
1225    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1226      (were missing in NH mode, and wrong in quasihydrostatic mode).
1227      waiting for Chris updated version of calc_gw to add those CALLs.
1228    o fix bug in quasihydrostatic S/R ;
1229      add a test for this option: global_ocean.90x40x15.qshyd
1230    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1231      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1232    o add on/off flag useOffLine for package OFFLINE
1233    o seaice:
1234      - modify advection so that it works also on the C-grid
1235      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1236        problem in multi-tile runs with C-grid
1237      - add flags for clipping ice velocities and/or masking solver forcing
1238      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1239        C-grid solver
1240      - added a few comments to seaice_diffusion.F
1241      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1242        are now exclusive)
1243      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1244        required re-ordering the code a little:
1245       + make DAIRN global variable (defined in SEAICE)
1246       + move computation of the viscosities eta and zeta into a new separate
1247         routine (because I need to recompute them in seaice_ocean_stress.F)
1248    
1249    checkpoint58b_post
1250    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1251      update output.txt of exp. aim.5l_cs.thSI
1252    o various mnc cleanups and improvements:
1253      + shrink lookup tables by factor of ~4
1254      + better error reporting when running out of lookup space
1255      + able to handle longer path/file names (up to 500 chars)
1256    o adjoint:
1257      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1258      - TBD: "hidden" mom_vecinv recomp. in dynamics
1259    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1260     (allow to differentiate between forcing components using new integer flags:
1261      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1262     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1263    o ecco
1264      - enable trend removal from SSH anomaly obs.
1265    o adjoint
1266      - a fix for PmEpR when #undef EXACT_CONSERV
1267      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1268      - try to fix "hidden" recomp. in forward_step for NLFS
1269        (NLFS seems broken sometimes after I checked it in)
1270    o seaice:
1271     - add c-grid version of the dynamic solver:
1272       + three new routines that are the c-grid substitute lsr, dynsolver
1273         and ostres
1274       + put a few fields that were local to dynsolver into global common
1275         blocks, so that I can move the computation of stresses etc into
1276         seaice_lsr (saves coding but may break the adjoint).
1277     - replace more hardwired parameters by runtime parameters
1278     - add ice masks that mask the rhs of the implicit solvers where there
1279       is no ice (commented out in seaice_dynsolver, because i am not sure
1280       if this works properly), eventually this should replace the clipping
1281       of ice velocities in seaice_dynsolver to +/-40cm/s.
1282    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1283      include it only where its needed
1284    o move balancing of fluxes before the call of external_forcing_surf
1285    o seaice:
1286      - correct units of turning angles (now they are really in degrees)
1287      - move computation of GWATX/Y out of main routine into dynsolver
1288      - initialize GWATX/Y in seaice_init
1289    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1290      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1291    o seaice: add runtime flags for turning angles (default to zero)
1292    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1293      and trend from exf forcing and ctrl control adjustments
1294    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1295      (since checkpoint57x_post)
1296    o change the default rotation period to 86164.s = the Earth rotation
1297    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1298      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1299    o seaice advection: add code for choosing between the default (2nd order
1300      central differences) and multiDim advection schemes provided by
1301      pkg/generic_advdiff
1302    o seaice:
1303      - removed all references to SEAICE_GRID.h fields from
1304        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1305        (cubed-sphere configuration will change a little)
1306      - grid computations in seaice_init are obsolete now.
1307      - cleaned up code a little so that is easier to read (hopefully).
1308      - added new (better?) discretizations of default advection and diffusion
1309        (turn on with SEAICEuseFluxForm)
1310      - replace 1 in 3d global fields by kSurface in growth.F
1311      
1312    checkpoint58a_post
1313    o seaice:
1314      - bug fix in advect.F
1315    o shelfice:
1316      - separate shelfice load anomaly from pload (breaks with time
1317        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1318        Its default is 0., but it may be computed more cleverly from (unknown)
1319        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1320        done offline. A good approximation of the pressure load anomaly is
1321        necessary to avoid large initial adjustment processes underneath
1322        deep-reaching shelfice.
1323      - small fix in ISOMIP shelfice_thermodynamics
1324      - add more sophisticated thermodynamics of Hellmer (1989), this is
1325        now the default
1326      - give a few constants more intuitive names
1327    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1328      if bulk formulae are used in long integration (especially EmPmR). Turn
1329      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1330      if balancePrintMean, the imbalance that is substracted is printed to
1331      STDOUT.
1332    o fix bug (typo) in obcs_apply_eta.F
1333    o add a new package shelfice which enables us to model the circulation
1334      underneath shelf-ice with draughts of hundreds of meters.
1335     - works
1336     - to do: + include improved thermodynamics
1337              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1338                instead of new field kTopC
1339              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1340                instead of new field R_shelfIce and new code in ini_depth.F
1341                and ini_mask_etc.F?
1342              + adjust vertical mixing schemes?
1343    o seaice pkg:
1344     - add a cpp-flag to include a simple formula for a salinity dependent
1345       freezing point of sea water at the surface
1346     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1347       meridional stresses are now different (and hopefully correct)
1348    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1349       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1350       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1351    o pkg/diagnostics: add options and parameters for regional-statistics
1352       diagnostics ; define regions by reading a region-mask from a file
1353       (might add other options later)
1354    o pkg/bulk_force:
1355     - add option and parameters to use AIM surface-flux formulae.
1356     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1357       others forcing fields (defined in PARM05, parameter file "data") are loaded
1358       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1359     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1360     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1361     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1362       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1363     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1364    
1365    checkpoint58
1366    o add "--embed-source" option to genmake2 which, when the supporting
1367      tools can be compiled (as determined by genmake2) will turn on the
1368      embed_files package which then embeds the entire MITgcm source code
1369      (*.[fFhc] + Makefile) used for the build within the executable
1370      - requested by CNH but off by default
1371      - adds a paltry <9MB to the mitgcmuv executable in most cases
1372      - only writes the output when useEMBEDSRC in eedata is true
1373    o clean up 3-dim. relaxation codes:
1374      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1375      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1376      * Thanks to Tom Haine for testing!
1377    
1378    checkpoint57z_post
1379    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1380      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1381    o fix the pickup behavior for obcs in combination with ptracers
1382    o fix a bug in ptracers_external_fields_load
1383    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1384      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1385    o transfered surface NH pressure to eta field (if exactConserv).
1386    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1387         and update lab_sea output.txt file.
1388    o completing 3-dim. relaxation code: additional term
1389         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1390      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1391      * At compile time, in "EXF_OPTIONS.h" set
1392          #define  ALLOW_CLIMTEMP_RELAXATION
1393          #define  ALLOW_CLIMSALT_RELAXATION
1394      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1395          tauThetaClimRelax3Dim = 15552000.0,
1396          tauSaltClimRelax3Dim  = 15552000.0,
1397      * 3 cases:
1398          1) Use a constant-in-time 3-dim. field
1399          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1400          3) Real-time relax. to time-evolving prescribed field
1401    o Adding Laplacian-type smoothness constraint on
1402      initial and boundary (forcing) controls (ic, bc)
1403      * enable at compile-time via
1404        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1405      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1406      * Absolute scale somewhat unclear so far
1407      * no area weighting was included since no other cost term does so far
1408    
1409    checkpoint57y_post
1410    First step for a NLFS adjoint
1411    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1412    o new init. routines for calc_r_star, calc_surf_dr
1413    o still need to deal with ini_masks_etc
1414    o testreport seemed happy
1415    checkpoint57y_pre
1416    
1417    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1418    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1419    o add new offset feature to offline pkg (plus minor cleanup)
1420    o cfc fixes for final year of integration
1421    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1422      be in GCHEM_OPTIONS).
1423    
1424    checkpoint57x_post
1425    o fix testreport Pb in multiple test experiment.
1426    o cleanup our namelist syntax in verification:
1427      - make it more F95 standards compliant (some work still needed)
1428      - allows the vast majority of our tests to work with gfortran
1429    o Non-Hydrostatic:
1430     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1431     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1432    o Allow to apply AB on T,S rather than on AB(gT,gS):
1433     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1434     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1435       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1436     - need a "clever" read_pickup to restart from the other AB formulation
1437    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1438    o remove some unused variables (reduces number of compiler warnings)
1439    o adjoint
1440      * Disable useVariableViscosity for adjoint for time being
1441        (there are a number of extensive recomputations)
1442      * Initialize certain variables needed for adjoint
1443    
1444    checkpoint57w_post
1445    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1446                 fix the singleCpuIO RS version of MDSWRITEFIELD
1447       and add a WARNING if using globalFiles=T with multi-processors.
1448    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1449      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1450    o tracer advection scheme:
1451      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1452       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1453       was not very convenient).
1454      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1455       (further tests needed for the implicit DST & Flux-Limiter schemes).
1456    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1457      and sRef for convenience, handy, when you want to initialize
1458      ptracers in a large domain with a constant non-zero value. Also,
1459      untangle ptracers_init.F a little.
1460    
1461    checkpoint57v_post
1462    o change dome exp. to use variable viscosity in side-drag terms.
1463    o remove all the files from the cfc_offline test since they are now
1464      incorporated into tutorial_cfc_offline which has been producing
1465      identical results for a few days of testing
1466    o add new parameter: sideDragFactor to enable half-slip-side BC
1467      and change side-drag S/R to use viscosity from mom_calc_visc
1468      (can switch back by setting sideDragFactor=0.); affects results at
1469      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1470       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1471    o vorticity & strain are now computed without masking, to account for
1472      no-slip-side BC in variable viscosity calculation ; mask is applied
1473      anyway later on, before computing advection/coriolis terms.
1474    o modify exp4 to test new obcs support for reading from external files
1475      and for passive tracers
1476    o fix behavior of ptracers_monitor when monitor output is written to a
1477      netcdf-file; still not independent of monitor.F (writes in the same
1478      file).
1479    o change default value of tRef (put a uniform, meaningful value for ocean
1480      & atmos) and initialize sRef (was missing, as Martin mentioned).
1481    o Redefine viscC?Leith*.  Change the coefficients of Leith viscosity
1482      to be proportional to enstrophy dissipation length.  Thus,
1483       viscC?leith?_new=pi*(viscC?leith?_old)^(1/3)
1484      This is now consistent with Smagorinsky and with the manual.
1485    
1486    checkpoint57u_post
1487    o OBCS and PTRACERS: add open boundary support for passive tracers
1488      - either use homogenous (pseudo) v.Neumann conditions or prescribe
1489        OB-values from file; this is not different from the way theta and salinity
1490        are treated
1491      - however, Orlanski-radiation conditions are not supported, and the model
1492        will stop if you use pTracers and Orlanski at the same time.
1493      - beefed up the rountine obcs_external_fields_load: now only those open
1494        boundary values are overwritten with values from files for which there
1495        are really files, otherwise the OB-fields remain untouched. This makes
1496        it possible to use different OBs at different ends of the domain (as
1497        with EXF)
1498    o reduce number of exch calls in shap_filt (s2).
1499    o CS-grid: fix divergence contribution to Leith viscosity. Affects (@
1500      truncation level) 4/5 MLAdjust test results (11&12 digits match).
1501    
1502    checkpoint57t_post
1503    o test biharmonic viscosity + no-slip with exp: global_ocean.cs32x15.viscA4
1504    o finish adding brackets (coriolis S/R, vecinv) in multi-terms sum to get
1505      same truncation, independent of the face number: affects affects several
1506      test. exp.: Update global_ocean.cs32x15 (+.thsice) & MLAdjust (all 5).
1507    o fix bug in mom_v_sidedrag (biharmonic viscosity was counted 2 times);
1508      note that biharmonic viscosity + no-slip was not tested in any experiment.
1509    o fix bug in non-linear free-surf side-drag ; generate new output for
1510      global_ocean.cs32x15(+.thsice) & global_ocean_pressure.
1511    o make mnc honor the writeBinaryPrec flag for most kinds of output
1512    o eesupp: split EEPARAMS into EESIZE/EEPARAMS and add a vector global sum
1513    o minor change in averaging W (mom_vi_?_vertshear.F) that affects truncation
1514      error; update output from global_ocean.cs32x15(+.thsice) & MLAdjust (all 5).
1515    o add brackets in multi-terms sum to get same truncation, independent of
1516      the face number (manage to get exactly same value of gU,gV at the cs-edge)
1517      affects several test. exp. Update global_ocean.cs32x15 (+.thsice).
1518    o Clean, new version of mom_calc_visc.  Adds a new feature, viscAhRemax
1519      and viscA4Remax, which allow one to limit the minimum viscosity by specifying
1520      a maximum grid-scale Reynolds number.  Also, changes all length calculations
1521      in the case of grid anisotropy to geometric mean of dx**2 and dy**2.
1522      Suggested values of viscosity parameters found in mom_calc_visc.
1523      Many new viscosity diagnostics available.
1524    
1525    checkpoint57s_post
1526    o Add clearing-house for viscosity calculations, mom_calc_visc and
1527      correct numerous bugs in LeithD and Smagorinsky discretizations.  
1528      mom_calc_visc now allows for Smagorinsky, Leith and LeithD to be
1529      used simultaneously, and to be used in mom_vecinv and mom_fluxform.
1530      Mom_vecinv can be used with standard viscous calculation (mom_vi_hdissip.F)
1531      and with Strain-Tension viscous term calculation (mom_hdissip.F).  
1532      The Strain-Tension form is now called with useStrainTensonVisc=.true.
1533      ViscAhStrain and viscAhTension are now retired.
1534    o diagnostics "VISCAHD" & "VISCA4D" replace "VISCAH" & "VISCA4".
1535    o In response to JMC's bug report, genmake2 now ignores any soft-links
1536      that it finds in the *current* directory when searching for files.
1537      Soft-links found in any other source directories will still work as
1538      they did before.
1539    o add HAVE_SETRLSTK define and useSETRLSTK flag (eedata) which calls
1540      a C routine to unlimit the stack size
1541    o mnc-ify pkg/aim snapshot vars
1542    o mnc-ify pkg/land as requested by Daniel
1543    o various changes to mnc including:
1544      - all files use the new "BASENAME[[.ITER].{t|f}NUM].nc" format
1545      - output can now be grouped so that all files within a group
1546          change the ITER portion of their names in lock-step together
1547      - can now read ("global") PER-FACE (in addition to PER-TILE) files
1548          and works with both EXCH1 and EXCH2 (but needs more testing)
1549      - writing works for all verification test cases w/ g77 on Linux
1550    
1551    checkpoint57r_post
1552    o make MNC variable initialization happen earlier
1553    o add diagnostics for (almost) each term of the momentum Eq.
1554    o remove SST,SSS,UVEL_k2,VVEL_k2 diagnostics.
1555    o move pkg timeave out of pkg-groups "oceanic" & "atmospheric" (pkg/pkg_groups)
1556    o remove MINIMAL_TAVE_OUTPUT option ;
1557      add "dumpInitAndLast" to replace "nodumps" (and MINIMAL_TAVE_OUTPUT).
1558    o move some basic S/R (used elsewhere in the code) from pkg/mdsio to eesupp/src
1559      allows to compile without pkg/mdsio (& test successfully hs94.1x64x5)
1560    o add MNC output for adjoint of EXF (adexf), SEAICE (adseaice)
1561    o add time-dependent SST, SSS control
1562    o cost terms in ecco/ modularized (new cost_generic.F)
1563    o cost_averages routines are modularized (new cost_averagesgeneric.F)
1564    o new infrastructure for seaice model vs. obs misfits in seaice/
1565      * driver from the_main_loop.F is seaice_cost_driver.F
1566      * first term is AREA vs. SMR observation misfit (ALLOW_SEAICE_COST_SMR_AREA)
1567      * gradient check in Exp. 6a of natl_box_adjoint/
1568    o natl_box_adjoint input_seaice for Lab. Sea now available online via wget
1569      (see README file)
1570    
1571    checkpoint57q_post
1572    o fix initialisation Pb in calc_gw (get NANs in exp5 with g77)
1573    o fix annoying months-old bug in mnc/mdsio output for seaice pkg
1574      - bug was reported by Jean-Michel and Ian Fenty
1575    o fix initialization Pb in AIM-Ocean coupled model (aim_sice2aim.F)
1576      update exp. cpl_aim+ocn output.
1577    o Implement 4-level checkpointing: AUTODIFF_4_LEVEL_CHECKPOINT
1578      Needed for high-res. runs with large global files
1579      to be able to limit tapelev size
1580    o Changed some tests for adjoint:
1581      * carbon/ now tests AUTODIFF_2_LEVEL_CHECKPOINT
1582      * natl_box_adjoint/code_bulk/ tests AUTODIFF_4_LEVEL_CHECKPOINT
1583      * global_ocean.90x40x15/ back to default 3-level checkpointing
1584    o Modifications to enable scripted COMMON to MODULE conversion
1585      * verification/OpenAD/code/ has necessary scripts and description;
1586      * converts, compiles and runs successfully;
1587    
1588    checkpoint57p_post
1589    o reading of delXfile & delYfile moved from ini_parms.F to ini_grid.F
1590    o move ${PKG}_MNC_INIT from ${PKG}_READ_PARAMS to ${PKG}_INIT_FIXED
1591      (already the case for some pkgs, including recent MNC_init, e.g. thsice)
1592    o call CALC_GW from DYNAMICS (instead of from FORWARD_STEP)
1593    o Dissipation & phiHyd gradient are always added to gU,gV in timestep.F
1594      (was already the case for dissipation with mom_vecinv,
1595       and also the case for grad.PhiHyd when staggered-timeStep)
1596      This will allow to put dissipation out-off the AB time-stepping.
1597     Unfortunately, affects truncation error. Update output of exp. that "fails"
1598      (cg2d matching number) and leave the others for later: front_relax(10),
1599      global_ocean_pressure(10),ideal_2D_oce(10),internal_wave(9),lab_sea(12),
1600      matrix_example(7!),natl_box(12),plume_on_slope(11),vermix(12x3,11x2).
1601    
1602    checkpoint57o_post
1603    o fix MNC/MDSIO flags in PTRACERS so that (1) it works, and
1604      (2) its ready to be documented during the 20050801 DocFest
1605    o MNC-ify the gmredi package -- tested and works w/ and w/o mnc
1606      for ideal_2D_oce and lab_sea on linux_ia32_g77
1607    o set to #undef CTRL_SET_OLD_MAXCVARS_30
1608      in global1x1_tot/code_seaice_adj to access indices 32, 33
1609      (worth another tag)
1610    
1611    checkpoint57n_post
1612    o adding precip control xx_precip 32
1613    o adding swflux control xx_swflux 33
1614    o Replacing 10 forcing penalty cost routines by 1 generic.
1615    o Implementing partitioning in time-mean and variable adjustment
1616      for atmos. state.
1617    o Time-mean constant error is now read in data.ecco (instead of hard-coded)
1618  o in natl_box_adjoint:  o in natl_box_adjoint:
1619    * updated: results_bulk/    * updated exp 1 to 10
1620    * not yet updated: results/, results_seaice/      (but does not have time-mean vs. variable split results yet)
1621    o updated global1x1/*_seaice_adj/
1622      to incorporate latest changes
1623    o enable useSingleCpuIO for mdsio vector routines
1624      (applies in particular to tapelev I/O)
1625    o removed inefficient K-loop in all active_file*control*.F
1626    
1627  checkpoint57m_post  checkpoint57m_post
1628  o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)  o re-arrange exp. adjustment.cs-32x32x1 (adjust_nlfs.cs-32x32x1 merge into)

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