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revision 1.1749 by mlosch, Tue Oct 16 07:08:56 2012 UTC revision 1.1945 by jmc, Tue Dec 3 00:37:55 2013 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o coupling interface pkgs:
8        [atm_compon_interf, ocn_compon_interf & atm_ocn_coupler]
9      - change the config check to test the agreement of Ocean Depth
10        with ATM land/sea mask (instead of ATM orography);
11      - send to coupler the number of coupler time-steps to do for this run:
12        this allows to check for consistency and don't need anymore to be
13        specified in parameter file "data";
14      in coupler:
15      - check consistency of RunOff map versus Ocean Depth and ATM land/sea mask.
16      - improve report to log-file of config setting (pass log-file unit to few S/R)
17    o pkg/compon_communic:
18      - add coupling send/receive for non-tiled integer vector;
19      - add S/R to check and stop if any proc has an error (similar to
20        eesupp/src/stop_if_error.F but single thread and across Comm_World).
21    o pkg/exch2:
22      - in exch2*_get_rx[1,2]: use new list "W2_tileIndex" to replace search
23        through list of all tiles my proc owns.
24    o model/src:
25      - AUTODIFF only: in calc_adv_flow.F, recompute rTransKp (instead of copying
26        from rTrans) to simplify dependencies (no need to store rTrans anymore in
27        calling S/R); this affects AD results at machine truncation level:
28        update AD-output (TAF) of experiments: 1D_ocean_ice_column,
29        bottom_ctrl_5x5 & obcs_ctrl (12 digits for AD grad, same FWD grad).
30    o tools/build_options:
31      - simplify Warnings options (-ieee & -devel cases) in linux_amd64_gfortran
32    o coupling interface pkgs:
33        [compon_communic, atm_compon_interf & ocn_compon_interf]
34      - move declaration of local array "ibuf" out of header file "CPLR_SIG.h"
35        to each S/R that needs it; remove un-used variables.
36      - change component tile registration (cpl_register.F in both compon_interf
37        and mitcomponent_tile_register.F) to pass the full list of tiles
38        information (including bi,bj) in 1 vector (instead of in a bi,bj matrix).
39      - with pkg/exch2: adopt the same convention used for I/O to define mapping
40        towards coupler global array (unless W2_useE2ioLayOut=F):
41         a) can now use different tiling between atm & ocn comp.
42         b) no needs to modify the run-Off map when changing tiling (was needed
43            even if using the same tiling between atm & ocn).
44         c) will allow to run with blank-tiles in 1 component (e.g., for ocean
45            full land tiles); not yet tested.
46      - check for valid mapping from comp. tile to coupler global array
47      - improve report of tile registration results to log file.
48    o pkg/exch2:
49      - in eesupp/src/eeboot.F: move call to W2_EEBOOT before Coupler
50        tile-registration (CPL_REGISTER);
51      - activate (un-comment) definition and setting of "W2_tileIndex" list to
52        store the local bi,bj indices of each tile;
53      - also print bi,bj in local report to log file;
54      - fix pkg/debug/debug_cs_corner_uv.F for the case nSy > 1 (left from
55        Jun 2009 modif of pkg/exch2).
56    o testing on baudelaire:
57      - run 2 tests at a time: no significant slow down (since enough cpu) and
58        get the full set of test done earlier
59      - switch the ifort test to "-devel" ; run the OpenAD test everyday.
60    o model/src/thermodynamics.F and routines called from it:
61      - pkg/gmredi: gmredi_residual_flow.F (replacing gmredi_calc_uvflow.F &
62        gmredi_calc_wflow.F) to update eulerian velocity (input) into residual
63        velocity (outp) by adding bolus velocity.
64      - model/src: calc_adv_flow.F (replacing calc_common_factors.F) to compute
65        mass transport from velocity + lateral grid cell area
66      - rename calc_gt.F to temp_integrate.F (includes call to TIMESTEP_TRACER)
67      - rename calc_gs.F to salt_integrate.F (includes call to TIMESTEP_TRACER)
68     in thermodynamics.F
69      - remove k from thermodynamics.F and move it to temp_integrate.F
70        salt_integrate.F and ptracers_integrate.F (now done inside the tracer
71        loop).
72      - compute locally (in thermodynamics.F) 3-D velocity field that is used to
73        advect tracers; pass it as argument to GAD_ADVECTION, GAD_SOM_ADVECT,
74        PTRACERS_ADVECTION, TEMP_INTEGRATE, SALT_INTEGRATE, PTRACERS_INTEGRATE,
75        GAD_IMPLICIT_R and PTRACERS_IMPLICIT
76      - update AD-output (TAF & OAD) of experiments: 1D_ocean_ice_column,
77        global_ocean.90x40x15, tutorial_global_oce_biogeo and
78        tutorial_tracer_adjsens (+ TLM output).
79    o tools/OAD_support and (verification/*/) code_oad:
80      - OAD_support/cb2mGetModules.csh: add PACKAGES_CONFIG.h in header file to
81        module conversion ; remove unneeded CPP_EEOPTIONS.h.
82      - code_oad/CPP_OPTIONS.h: remove PACKAGES_CONFIG.h and use a more standard
83        version (closer to model/inc/CPP_OPTIONS.h).
84    o model/src:
85      - remove parameter "useOldFreezing" from PARAMS.h and push it to the
86        retired list of parameters (routine FREEZE has been replace by surface
87        freezing (10.yrs ago) and by pkg/frazil (interior freezing).
88    o pkg/gmredi:
89      - add option (GM_CALC_TRANSP_FROM_VEL) to compute transport directly from
90        velocity (same scheme but affects machine truncation) for GM_AdvForm.
91      - update output of FWD experiments: front_relax.bvp,
92        global_ocean.90x40x15.dwnslp, global_ocean.cs32x15 and ideal_2D_oce.
93    
94    checkpoint64q (2013/11/17)
95    o verification:
96      - generate new output on baudelaire (gfortran, -ieee) for OpenAD experiments
97        tutorial_global_oce_biogeo and global_ocean.90x40x15.
98      - generate new output (growth & melt) for seaice_itd experiment after
99        updating the input pickup_seaice files (previously wrong).
100    o pkg/cost:
101      - define a "final cost function" for each tile, and use GLOBAL_SUM_TILE_RL
102        (instead of _GLOBAL_SUM_RL) to get the final cost from all procs & threads:
103        o this fixes global-sum value if multi-threads (since GLOBAL_SUM_TILE_RL
104          cannot be applied to var in common block).
105        o allows to get results independent of tile-per-proc setting (if using
106          slower GLOBAL_SUM_SEND_RECV option).
107      - update accordingly: seaice_cost_final.F, shelfice_cost_final.F,
108        thsice_cost_final.F and ecco_cost_final.F (this one affects lab_sea
109        forward gradients: update output).
110      - update */code_oad/externalDummies.F by adding dummy GLOBAL_SUM_TILE_RL
111        S/R and, for most exp., also comment out GLOBAL_SUM_R8.
112    o pkg/mom_common:
113      - move to pkg/mom_common and model/src (previously in tutorial_deep_convection
114        code) 2nd version of isotropic 3-D Smagorinsky code interface: strain and
115        viscosity are locally declared in dynmics.F and pass as argument to CALC_GW;
116        ensure that all field value that are used are set.
117    o tutorial_deep_convection (smag3d):
118      - add missing scaling in mom_calc_smag_3d.F;
119      - set smag3D_coeff in input.smag3d such that results do not change.
120    o pkg/dic:
121      - change dic_cost.F to compute cost on each tile first and then apply
122        GLOBAL_SUM_TILE_RL: this affects forward gradient of AD experiments
123        tutorial_dic_adjoffline & tutorial_global_oce_biogeo; update output.
124      - remove kLev argument and use GLOBAL_SUM_TILE_RL in tracer_meanarea.
125    o eesupp/src & pkg/mdsio:
126      - remove gather/scatter_vector.F (from eesupp) and mdsio_read/writevector.F
127        (from pkg/mdsio) since they are no longer used for tape IO.
128      - move simple C subroutine "setdir.c" from pkg/compon_communic to eesupp/src
129        (+ keep a copy in pkg/atm_ocn_coupler).
130    o verification/isomip:
131      - split domain in 8 squared tiles (instead of just 2) for FWD, AD & OAD tests.
132    o tools/build_options:
133      - optfile linux_amd64_ifort11, fast (no ieee) case:
134        to get a working restart for all experiments, add "-fp-model source"
135        to FOPTIM (also remove "-opt-streaming-stores auto" <- this is the default).
136    
137    checkpoint64p (2013/10/20)
138    o pkg/autodiff:
139      - adread_adwrite.F: when type and length do not match ALLOW_AUTODIFF_WHTAPEIO
140        criteria, return to simple (default) tape IO format.
141    o pkg/mdsio (+ eesupp/src):
142      - rewrite/simplify tape-IO S/R (new S/R MDS_READ/WRITE_TAPE replace
143        previous MDSREAD/WRITEVECTOR) with 2 array argument from each type (R4/R8);
144      - fix globalFile and singleCpuIO options using simpler global mapping.
145      - new pairs of scatter/gather vector S/R (one for each type, generated from
146        template) corresponding to simpler global mapping.
147      - adread_write.F: switch to new S/R (but leave old calls commented) and write
148        to globalFile when parameter globalFiles is set to True.
149      - switch on useSingleCpuIO in AD experiments: global_ocean.90x40x15 & isomip.
150    o pkg/autodiff:
151      - adread_adwrite.F: add a hack for RS arrays (when RS=real*4);
152        with ALLOW_AUTODIFF_WHTAPEIO defined, since corresponding (real*4) is
153        missing, just add a STOP if array type do not match.
154    o pkg/exf:
155      - to allow to use seaice-fraction from pkg/exf in other pkgs than pkg/seaice:
156         rename CPP option EXF_ALLOW_SEAICE_RELAX to EXF_SEAICE_FRACTION
157         and rename array obsSIce to exf_iceFraction.
158    o tutorial_deep_convection:
159      - add 1rst version of isotropic 3-D Smagorinsky code (from Louis-Philippe),
160        for now all in this exp. code dir.
161      - add secondary test using Smag-3D viscosity (keep very low backgroud visc for
162        testing) and flux-limter advection scheme for Temp. (no explicit diffusion).
163    o eesupp/src:
164      - added SINGLE_DISK_IO option because reading of parameter files on
165        very large number of processors did not work with existing set-up
166    
167    checkpoint64o (2013/09/25)
168    o pkg/atm_phys & atm_compon_interf:
169      - allows for coupling of gray-atmosphere (atm_phys) with ocean.
170    o tools/build_options:
171      - switch from "-fPIC" to "-mcmodel=medium" in optfiles: linux_amd64_gfortran
172        & linux_amd64_ifort11 and in linux_amd64_g77 & linux_amd64_open64 also
173        remove CPP setting (was identical to genmake2 default).
174    o pkg/gmredi & model/src: Some updating and work done on the residual model.
175      - created new file model/src/calc_eddy_stress.F to calculate the eddy stress.
176      - fixed up the calculation of the eddy stress and how it is added to the
177        external forcing via taueddy_external_forcing.F
178      - at the moment, it is very experimental and only works with the variable eddy
179        diffusivity calculated in gmredi_k3d.F
180    o pkg/seaice/seaice_check.F: add a check to catch the case of specifying
181        lw/swfluxfile instead of lw/swdownfile in data.exf together with pkg/seaice
182    o testreport (& tools/do_tst_2+2):
183      - for MPI test, set default COMMAND to 'mpirun -v -np TR_NPROC ./{executable}'
184    o tools/build_options: linux_amd64_gfortran & linux_amd64_ifort11:
185      - remove CPP='cpp -traditional -P' (this is genmake2 default)
186      - add switch (for big setups) to use 'medium' memory-model (but leave it
187        commented out for now). Note: needed with FC 19 to compile big setups.
188    o pkg/atm_compon_interf:
189      - regroup per field origin (model & pkgs) the coupling storage routines
190         (which accumalate in time each coupling field)
191      - move bi,bj loops inside atm_store_my_data.F and store also wind-stress;
192        update accordingly + simplify aim_do_physics.F
193    
194    checkpoint64n (2013/08/26)
195    o pkg/bbl:
196      - update formulation to reduce dispersion of tracer properties in bbl
197      - replaced horizontal and vertical transport parameters with velocities
198      - changes results for verification/global_with_exf.yearly
199    o verification/halfpipe_streamice:
200      - change to matrix construction; update both Fwd & AD output.
201    o verification/tutorial_tracer_adjsens:
202      - OpenAD test: switch to vector-invariant momentum since fluxform with
203        rStar causes problems with OpenAD; update output.
204    o tools:
205      - genmake2: define a common prefix for all temp-file names ; move them
206        to local /tmp disk (but would be easy to move them back);
207      - xmakedepend: apply the same switch for temp-files.
208    o pkg/offline:
209      - changes for use with rStar (NLFS): assume that we continue to provide
210        UVELMASS/hFacW_ini & VVELMASS/hFacS_ini (hFacWi,S_ini as written in grid
211        output files) and apply r* scaling at each time-step (function of the time
212        varying Eta field); use normal pickup files (needed for restart with NLFS).
213    o adjoint with OpenAD:
214      - move OpenAD-specific files from verification/OpenAD/code_oad_all to a new
215        package openad.  This package has to be compiled for all runs with OpenAD
216        instead of specifying code_oad_all as a modification directory.
217      - link the fortran templates from tools/OAD_support to the build directory
218        for preprocessing to avoid conflicts between different setups compiled
219        simultaneously and simplify cleanup.
220    o pkg/exf:
221      - in exf_getforcing.F: comment out most of the EXCH calls (fields used by
222        main model or other pkgs are exchanged in EXF_MAPFIELDS).
223    o model/src:
224      - do_stagger_fields_exchanges.F: skip EXCH calls when using pkg/offline
225        (similar to do_fields_blocking_exchanges.F).
226    o tools/genmake2:
227      - remove TAF output src code just before calling staf (when not doing a fresh
228        built, will stop if things go wrong with staf).
229      - fix target "adobj" (left from TAF version-2 transition)
230    o pkg/diagnostics:
231      - add a parameter to track the status of pkg/diagnostics activation;
232        this replace/extend the use of logical param "settingDiags" (to check
233        when adding diag to the list) to also check any DIAGNOSTICS_[]FILL* call.
234        New S/R to print error message and stop when pkgStatus is not right.
235      - to try: add a warning when "data.diagnostics" exist but useDiagnostics=F.
236    
237    checkpoint64m (2013/08/13)
238    o model/inc:
239      - move FCORI_MACROS.h from PARAMS(_MACROS).h to GRID_MACROS.h (left from
240        8 yrs ago modif when Coriolis arrays were moved from PARAMS.h to GRID.h)
241    o pkg/kpp & aim_v23:
242      - only call DIAGNOSTICS_FILL when useDiagnostics=TRUE.
243    o pkg/seaice:
244      - restore (last time on 2011/12/24) ability to compile pkg/seaice with
245        undefined pkg/exf ALLOW_ATM_TEMP or ALLOW_RUNOFF CPP-options.
246      - only call DIAGNOSTICS_FILL when useDiagnostics=TRUE.
247    o eesupp/src:
248      - fix check for overlap-size argument (myOLn.GT.MAX_OLY_EXCH)
249        in exch1_rx[_ad].template (thanks to Francois Lefeuvre report).
250    o switch to TAF version-2:
251      - add flow directives to "freeze" naming convention for ad-routines that
252        are used in I/O routines of adjoint state and associated common blocks
253        that are used in adcommon.h (backward compatible with version-1)
254      - update all ad-optfiles (in tools/adjoint_options + few local to some
255        verification exp) to switch to latest TAF version (currently 2.5.5);
256        merge "*_mpi" adoptfiles into the corresponding non-mpi (but commented
257        out except for diva).
258      - the major change with TAF version-2 is that both the differentiated
259        routines and the forward routines (new) are returned as part of the TAF
260        output source code. Update genmake2 accordingly.
261      - new output for AD experiment tutorial_global_oce_biogeo (better AD gradient
262        with version-2 when compared to TLM or FWD gradient); other experiments
263        output show minor changes (machine truncation level); update the few AD &
264        TLM output with 12 matching digits only (some prior to version-2 switch).
265    
266    checkpoint64l (2013/08/05)
267    o model/src:
268      - in dynamics.F, skip the call to CALC_VISCOSITY if momViscosity=F
269      - main_do_loop.F: no longer includes additional (AUTODIFF) header files
270        when using TAF but only if using OpenAD.
271    o pkg/mom_common+fluxform+vecinv:
272      - always set horiz. viscosity arrays to background value before calling
273        MOM_CALC_VISC (in MOM_FLUXFORM & MOM_VECINV) and call S/R MOM_CALC_VISC
274        only when using variable horiz. viscosity (useVariableVisc=T);
275      - simplify mom_vecinv.F (only 1 block for momViscosity).
276    o pkg/mom_common: variable horiz. viscosity in NH code
277      - move horiz-viscosity 3-D arrays viscAh_W & viscA4_W (used in calc_gw.F)
278        from model/inc/NH_VARS.h to pkg/mom_common/MOM_VISC.h
279      - store in common block (in MOM_VISC.h) logical parameters: useHarmonicVisc,
280        useBiharmonicVisc & useVariableVisc.
281      - fix old bug (already in 1rst implementation of variable horizontal viscosity
282        in calc_gw.F, version 1.27, 2006/06/20):
283        horizontal bi-harmonic viscosity in gW was missing when wiscA4W=0
284        even if variable bi-harmonic viscosity (e.g., viscA4Grid) was non-zero.
285      - change background horiz viscosity in vertical momentum (gW) to always be
286        viscAhW,viscA4W (instead of switching to viscAhD, viscA4D when using
287        any type of variable viscosity, e.g., viscAh/4Grid)
288      - change default value of viscAhW,viscA4W to viscAhD,viscA4D (instead of
289        viscAh,viscA4) which default to viscAh,viscA4 :  this avoid missing
290        horiz. viscosity in W eq when just setting viscAhD/Z,viscA4D/Z (since
291        default viscAh,viscA4 is zero).
292    o model/src:
293      - extend length of drC & recip_drC from Nr to Nr+1.
294    o Divided Adjoint (DIVA) with MPI:
295      - genmake2: do not create local ./mpi_headers dir when no file to copy into.
296      - remove option ALLOW_DIVIDED_ADJOINT_MPI (replaced by ALLOW_DIVIDED_ADJOINT
297        and ALLOW_USE_MPI) from model/src code and from ECCO_CPPOPTIONS.h.
298    
299    checkpoint64k (2013/07/23)
300    o tools/OAD_support:
301      - avoid the need for file "oadtempflile" in insertTemplateDir.bash
302        and remove it from genmake2.
303    o tools/build_options:
304      - remove MPI_HEADER_FILES_INC setting (no longer used) and comment out
305        MPI_HEADER_FILES list (let genmake2 find the missing headers)
306    o verification/halfpipe_streamice:
307      - change to driving stress formulation; update both Fwd & AD output.
308    o tools/genmake2 and Divided Adjoint with MPI:
309      - remove default setting of MPIINCLUDEDIR from $MPIHOME (always been broken);
310      - only create local ./mpi_headers dir if using MPI and MPIINCLUDEDIR is set;
311      - add new variable (LOCAL_MPI_HEADERS, replace MPI_HEADER_FILES_INC) in
312        Makefile, which is set by genmake2, and check which mpi-headers are needed.
313        Note: need to update adjoint_options/adjoint_diva_mpi accordingly.
314      - update target "CLEAN" (to also remove ./mpi_headers/ dir).
315    o testreport:
316      - changes for Divided Adjoint Run: when file "run_ADM_DIVA" is present,
317        perform additional runs (number of additional runs is "add_DIVA_runs" taken
318        from file run_ADM_DIVA ; should match "nchklev_3" in file "code_ad/tamc.h").
319    o verification/lab_sea (AD test):
320      - change to test Divided Adjoint Run in this set-up (both standard AD test
321        and 2 secondary AD test: noseaice + noseaicedyn); drop the evp AD test.
322    o pkg atm_ & ocn_compon_interf:
323      - remove cpl_earlyExpImpCall=F option (was mainly a hack added for the old
324        staggerTimeStep implementation) and disable (retired) corresponding
325        parameter.
326    o pkg/offline:
327      - comment out unused field-array: ICEM, ConvectCount, hflx[01], icem[01];
328      - add S/R OFFLINE_CHECK to print offline parameter summary
329        and stop if loading a file that is not used;
330      - enable to calculate GMRedi tensor, KPP mixing and convective index
331        when the corresponding file(s) is/are not specified (but pkg is used).
332      - comment out resetting of monitorFreq (to endTime) since it still useful
333        for monitoring CFL numbers and checking offline fields.
334    o OpenAD:
335      - do not define OAD_DEBUG (in tools/adjoint_options/adjoint_oad) to get
336        smaller standard output) and generate new (smaller) output (on baudelaire
337        using gfortran with -ieee) for exp. tutorial_tracer_adjsens
338    o model/src:
339      - call EXTERNAL_FORCING_SURF outside bi,bj loops (in do_oceanic_phys.F),
340        (where external_forcing_adjust was called) and change list of arguments;
341      - merge external_forcing_adjust.F into external_forcing_surf.F
342      - put surface relaxation of SST & SSS in new S/R (forcing_surf_relax.F)
343        which also contains balancing surface relaxation (ALLOW_BALANCE_RELAX,
344        previously in file "balance_relax.F", now removed); remove corresponding
345        arrays in FFIELDS.h.
346      - EXTERNAL_FORCING_SURF is now called when using pkg/offline; implement
347        a hack for getting back surfaceForcingS (loaded from file) when using
348        ALLOW_OLD_VIRTUALFLUX (pkg/dic, in DIC_OPTIONS.h) in offline set-up.
349      - update output of AD test experiment global_ocean.cs32x15.seaice_dynmix
350        (was getting only 11 digits for AD-grad, due to different truncation
351         error in AD code).
352    
353    checkpoint64j (2013/07/04)
354    o pkg/offline:
355      - to enable the use of other features with pkg offline (e.g., obcs),
356        also call S/R DO_OCEANIC_PHYS in offline run - more modifs to come.
357      - comment out "allowFreezing" (now active) in 2 offline testing exp.
358    o pkg/exf ALLOW_RUNOFTEMP
359      - fix sign and make compatible with temp_EvPrRn .NE. UNSET_RL
360      - ahdded RUNOFTEMP test to verification/global_ocean.cs32x15/input.seaice
361      - changes verification/global_ocean.cs32x15/results/output.seaice.txt
362    o pkg/atm_phys:
363      - allows to add some damping on uVel,vVel (strength only function of k).
364    o verification, ad-tests:
365      - reduce length of the simulation for AD test: global_ocean.cs32x15.seaice,
366        global_ocean_ebm and offline_exf_seaice.thsice.
367    o verification/halfpipe_streamice:
368      - found a bug in s/r pkg/streamice/streamice_advect_thickness which caused
369        flux input boundary conditions to be ignored; a fix for this bug changed
370        verification results for forward test.
371      - add adjoint test.
372    o pkg/ptracers:
373      - allow to restart without SOM pickup (resetting SOM to zero).
374    o pkg/gmredi:
375      - New parameterisation for the calculation of K and (GM_PsiX,GM_PsiY) added.
376      - It uses mixing length theory and suppression by steering level effects to
377        calculate a diffusivity used in the Redi tensor (see Bates et al., submitted
378        to JPO, for more details).
379      - It also uses the diffusivity to calculate an eddy induced streamfunction
380        based on a PV closure (rather than a buoyancy closure as in GM).
381      - New files added to pkg/gmredi:
382        gmredi_k3d.F calculates the diffusivity for the Redi tensor and the eddy
383          induced overturning streamfunction (called from gmredi_calc_tensor)
384        gmredi_calc_eigs.F calculates the eigenvalues and eigenvectors required
385          for use in gmredi_k3d
386        gmredi_calc_urms.F calculates the the rms eddy velocity used to calculate
387          the eddy diffusivity
388    
389    checkpoint64i (2013/06/18)
390    o pkg/cheapaml:
391      - take src files from MITgcm_contrib/verification_other/offline_cheapaml/code
392        that enable the use of seaice (pkg/thsice thermo & pkg/seaice dynamics)
393        with pkg/cheapaml.
394    o utils/python: add subpackage for cubed sphere function, first example is
395        simple cs.pcol to plot 2D fields on a map
396    o pkg/streamice:
397      - This is a new package in MITgcm, which solves dynamic equations for ice
398         sheets and ice streams
399      - At the moment it is independent of atmosphere/ocean dynamics, or any
400        other physical packages in MITgcm, even ShelfIce (although it is anticipat-
401        ed that this will change)
402      - There is a new verification exercise that tests it, halfpipe_streamice,
403        evolves a 40x80 km ice stream/ice shelf (at coarse resolution) in a
404        rectangular embayment
405      - halfpipe_streamice is forward-only for now, will have TAF test soon
406      - for questions, email dgoldber@mit.edu
407    o pkg/thsice:
408      - fix filling of snow-precip diagnostic (SIsnwPrc) (left from the removing
409        of snowPrc from common bloc, on May 2nd, thsice_step_fwd.F revision 1.40);
410      - remove diagnostics 'SI_FrcFx' ( now identical to 'SI_Fract' with new
411         call sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect );
412      - allow precip from pkg/cheapaml to make snow over seaice.
413    o pkg/cfc:
414      - move in separated header file (CFC_ATMOS.h) time-serie arrays of Atmos CFC
415      - remove atmos CFC 2-D arrays from common bloc (now local variables)
416      - change some hard-coded constant to run time parameter for reading and
417        and interpolating atmospheric CFC ; keep same default as previously.
418      - more flexible reading of Atmos CFC (number of records no longer hard-coded)
419      - put arguments in standard order: myTime, myIter, myThid
420      - use standard S/R GET_PERIODIC_INTERVAL for time interpolation of
421        atmospheric CFC ; fix for the case myIter < PTRACERS_iter0.
422      - fix calculation of surf tendencys for partial-cell and/or Non-Lin Free-Surf
423      - new routine to print summary of CFC params and check for consistency.
424    o pkg/seaice: add uice/vice to the parameter list of s/r seaice_advdiff,
425      similar to thsice_advdiff.
426      Note that for the B-grid case the routine parameters uc/vc are overwritten.
427    o pkg/cfc:
428      - change time interpolation for atmospheric CFC-11 (now same as for CFC-12);
429        update output (CFC-11) of experiment cfc_example and tutorial_cfc_offline.
430      - fix interpolation of atmphspheric CFC between Sorthern and Northern
431        hemisphere value.
432    o pkg/seaice:
433      - allow to use seaice dynamics without pkg/exf (e.g., using pkg/cheapaml)
434    o pkg/seaice: add Adams-Bashforth2 time discretization for ice dynamics;
435                  so far only for JFNK-solver, turn on with SEAICEuseAB2 = .TRUE.
436      - requires an additional time level that is stored in the pickup
437      - you can start with AB2 from a pickup without this time level with
438        pickupStrictlyMatch = .false.
439    
440    checkpoint64h (2013/05/26)
441    o pkg/cheapaml:
442      - replace one ()**.5 with SQRT + use temp var "cdu = tau/Du" (coare3_flux);
443        affect machine truncation (but exp cheapAML_box still pass with 13 digits).
444      - consistent treatment of uWind,vWind location: assume everywhere in
445        pkg/cheapaml that they are on C-grid (@ uVel,vVel location)
446        (Note: was already the case for Tair,Qair advection);
447        add option (INCONSISTENT_WIND_LOCATION) to recover old results.
448      - compute diabatic forcing only in the interior (excluding overlap regions)
449      - fill in array "Qsw" (for short-wave heating);
450      - add diagnostic for precip ; fill-in diagnostics for cheapAML state vars
451        before any update (consistent with MITgcm state var diagnostics);
452      - cheapaml_fields_load.F & cheapaml_init_varia.F : only fill outer edges if
453        non periodic ; + adjusted for uWind,vWind (C-grid).
454    o pkg/seaice:
455      - remove dependence of pkg/seaice versus pkg/exf (file: pkg/pkg_depend) and
456        add explicitly pkg/exf in experiments that currently use pkg/seaice.
457      - allows to compile pkg/seaice without pkg/exf.
458    o tools/OAD_support:
459      - use a local copy (ourRWCPinBd) to ensure index ourRWCP stays within bounds
460        of array "ourStepOf" in function rvNextAction (revolve.F90).
461    o pkg/aim_compon_interf renamed to pkg/atm_compon_interf
462      - change pkg name (to be used with other atmospheric physics pkg)
463        but by-pass CVS when making the new pkg so that we keep the CVS history.
464    o pkg/offline:
465      - call OFFLINE_FIELDS_LOAD from pkg/offline/offline_init_varia.F
466        (previously called from pkg/dic_surfforcing_init.F)
467    o model/src:
468      - re-order sequence of calls within packages_init_variables.F, using
469        standard order, except for:
470         DIAGNOSTICS_INIT_VARIA and OFFLINE_INIT_VARIA (called @ the top),
471         CTRL_MAP_INI and OBCS_INIT_VARIABLES (called @ the bottom)
472    o new pkg: atm_phys
473      - add entry point and source code (previously in contrib
474          verification_other/atm_gray/code_gray/) for new pkg "atm_phys"
475        (atmospheric physics pkg from P. O'Gorman and T. Schneider, JCl, 2008).
476      - re-order sequence of calls within packages_readparms.F,
477         packages_init_fixed.F and packages_write_pickup.F
478        (but skip packages_init_variables.F because of TAF issues).
479      - update contrib/*/atm_gray/ experiment.
480    o pkg/seaice (ITD code):
481      - simplify and fix the writing of pickup-files for ITD case
482    o pkg/seaice (ITD code):
483      - introduce floe size dependent lateral melt for ITD case;
484      - cleaning (avoid division by zero, change to f77 syntax, remove tabs)
485      - update seaice_itd experiment main output.
486    o pkg/thsice:
487      - remove snowPrc from common block THSICE_FLUX, in THSICE_VARS.h and
488        declared it locally (without bi,bj) in thsice_main.F & aim_do_physics.F;
489        changed accordingly pkg/atm2d.
490    
491    checkpoint64g (2013/05/01)
492    o pkg/exf ALLOW_RUNOFTEMP
493      - if defined,  river and glacier runoff temperature can be read-in from
494        runoftempfile; runoftempfile needs to have same format as runofffile
495    o pkg/thsice (& pkg/bulk_force):
496      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
497        for energy content of Precip + RunOff & Evap (like with pkg/exf).
498      - change computation domain to always be the interior (without overlap).
499      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
500    o verification/tutorial_global_oce_biogeo:
501      - add preliminary OpenAD setup (still has problems)
502    o pkg/seaice:
503      - turn some parameters for choosing the convergence criterion of
504        the inexact Newton method (JFNK) into runtime parameters for convenience
505      - clean up seaice_calc_viscosities.F: remove/retire two options for
506        SEAICetaZmethod (1,2), introduce area weighting for method 3; this changes
507        the results of lab_sea/input because a division has been replaced by
508        a multiplication with the reciprocal (sumNorm)
509      - modify offline_exf_seaice/input.dyn_jfnk/data.seaice to improve
510        convergence of solver (changes results, of course), and to test some
511        new features
512    o model/src:
513      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
514      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
515      - move forcing adjustment (balancing surface forcing) in specific S/R
516        where might also be applied exchanges (if needed) to forcing arrays.
517    o pkg/shelfice:
518      - allow to specify the Ice-Shelf mass per unit area (instead of
519        shelficeLoadAnomaly) and do the conversion from one to the other
520      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
521        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
522        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
523        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
524      - update isomip experiment forward output (get machine truncation error
525        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
526    o verification/offline_exf_seaice:
527      revise data.seaice in input.thermo and input_ad and update results accordingly
528        HO = 0.2, SEAICE_areaLossFormula = 2,
529        SEAICE_growMeltByConv = .TRUE.,
530        SEAICE_doOpenWaterMelt = .TRUE.,
531      Improve consistency with input.thsice and fix the spurious 500m ice corners
532    o verification/global_ocean.cs32x15:
533      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
534        in icedyn (thsice+seaice-dyn) test and update output.
535    o verification/offline_exf_seaice:
536      - adjust list of tested variables (with testreport) and update
537        standard test output with better slection of monitored fields.
538    o pkg/cd_code:
539      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
540        experiment lab_sea.hb87
541    o tools/genmake2:
542      - change default makedepend from the system default to tools/xmakedepend:
543        When no makedepend is specified, select tools/xmakedepend it the test pass,
544        otherwise select the system default (if exist and pass the test) or
545        try to build cyrus-makedepend ; stop if none of the 3 works.
546    o pkg/exf & pkg/thsice:
547      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
548        for energy content of Precip + RunOff & Evap. Assumes:
549       1) Rain has same temp as Air.
550       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
551       3) Run-Off comes at the temp of surface water (with same Cp)
552       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
553        put directly into Latent Heat flux & should use water-vapor heat capacity.
554       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
555        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
556    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
557        (compile when SEAICE_ALLOW_JFNK is defined)
558    o pkg/thsice:
559      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
560        implementation): move THSICE_AVE call after the advection (called directly
561        from thsice_do_advect.F).
562    o verification/global_ocean.90x40x15 and OpenAD:
563      New experiment for OpenAD is identical to the one in input_ad except that
564        multiDimAdvection=.FALSE.,
565      There is still an issue with this.
566    o pkg/thsice:
567      - account for ice velocity (ocean relative velocity) in turbulent heat flux
568        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
569        and offline_exf_seaice (main test).
570    
571    checkpoint64f (2013/03/31)
572    o verification/OpenAD:
573      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
574    o verification/isomip, pkg/shelfice and OpenAD:
575      - add OpenAD setup to this exp and make shelfice package work with OpenAD
576    o verification/tutorial_global_oce_biogeo:
577      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
578    o verification/offline_exf_seaice:
579      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
580    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
581      - add OpenAD setup to this exp and make ptracers package work with OpenAD
582    o pkg/seaice/seaice_evp.F:
583       mask the asymmetric contribution of the ice-ocean stress (when
584       the turningAngle is non-zero) over open water to avoid stripes
585       in the EVP-solutions after many EVP-substeps. This does not change
586       the verification experiment (because turningAngle=0 in that experiment),
587       but will affect other EVP solutions with turningAngle.ne.0
588    o verification, AD & TLM output:
589      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
590        additions and multiplications which affect results at machine truncation
591        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
592        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
593        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
594        digits of matching.
595    o pkg/seaice:
596       modify lsr-algorithm so that it vectorizes AND converges by using a
597       "zebra" method: split vector loop into two with step size 2; this
598       solves a general convergence problem for the JFNK solver on a vector
599       computer. It has the potential to even improve convergence for
600       non-vector machines, but it does change the results so it is turned
601       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
602       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
603    
604    checkpoint64e (2013/03/05)
605    o pkg/ecco and several verification experiments:
606       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
607       from ecco package, and revert to unified routine in model/src/
608       Adjust verification experiments accordingly, especially gloal_oce_llc90
609       Should conclude long-standing work by Gael to reconsile the_main_loop with
610       ECCO and will enable OpenAD's revolve loop in ECCO setup.
611    o pkg/generic_advdiff:
612      - implement compressible flow method for multi-dim advection (similar to
613        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
614        TAF generates many recomputations) to use it; no yet coded with implicit
615        vertical advection.
616      - change experiment advect_cs (new output) and advect_xy (same output)
617        to test compressible flow multi-dim advection.
618    o pkg/generic_advdiff:
619      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
620        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
621    o pkg/seaice:
622      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
623        bug affects two verification experiments (lab_sea and lab_sea.hb87),
624        recover old (wrong) results by setting noSlipFac = 2. in
625        seaice_calc_strainrates.F;
626      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
627      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
628        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
629      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
630    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
631      - new subroutines seaice_lsr_tridiagu/v
632      - introduce loop bounds i/jmin/max to be able to use a restricted
633        additive Schwarz method, but not used for now.
634      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
635      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
636    o OpenAD support
637       Reorganize S/R call for overall time-stepping loop to facilitate
638       OpenAD revolve loop replacement
639       (new S/R main_do_loop.F)
640    o model/src:
641      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
642      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
643        ADAMS_BASHFORTH2.
644    o pkg/cheapaml:
645      - add new parameter (default=F, same as before) to disable full domain
646        (including land) periodicity in X & Y dir.
647      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
648        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
649        into single S/R CHEAPAML_TIMESTEP.
650    
651    checkpoint64d (2013/02/17)
652    o pkg/monitor (angular momentum):
653      - do not add Eta contribution to the total AM if using rigid-lid;
654      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
655      - horizontal discretisation: compute Zonal wind contribution separately for
656        each component (instead of from cell centered averaged) and use the 4
657        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
658      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
659        FreeSurf) if using vectorInvariant momentum.
660    o model/src (horizontal grid):
661      - move initialisation of all horizontal grid arrays to null value
662        from specific horizontal grid S/R to main S/R INI_GRID;
663      - add 2 new arrays to project model C-grid velocity on to zonal direction
664        (similar to AngleCosC & -AngleSinC but at U and V point location) and
665        compute them in S/R CALC_GRID_ANGLES.
666    o pkg/seaice: replace a hard coded parameter by a runtime parameter
667        SEAICE_JFNK_tolIter
668    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
669        preconditioner for JFNK (run LSR into the overlaps as far as possible,
670        i.e OLx/y-2, but overwrite the solution in the overlaps)
671      - extend loop range in seaice_calc_viscosity
672      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
673      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
674      - slightly modify loops in tridiagonal solver lsr-preconditioner
675      - by default remove the extra exchange in seaice_preconditioner with a
676        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
677      - modify offline_exf_seaice so that old results without RAS are reproduced
678        for output.dyn_jfnk.txt
679      in seaice_fgmres.F (unrelated to RAS)
680      - add a cpp-flag option for a re-ordered mapping (potentially more
681        efficient), but because this changes the results, turn it off by
682        default
683      - replace the save statement by local common blocks
684    o utils/matlab:
685      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
686      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
687        instead of local script "load_cs.m".
688    o pkg/seaice:
689      - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
690        to the scalarProductMetric and the unrolling. By chance this does not
691        change the verification experiment, because of the particular domain
692        decomposition
693    o pkg/diagnostics:
694      - change default missing_value from UNSET_RL to -999.
695    o pkg/layers: improve vectorization of layers_fluxcalc.F
696      - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
697        time spent in this routine by more than a factor of 3 on an NEC-SX8
698      - step 2: replace search algorithm by a bisection algorithm found in
699        Press et al. Numerical Recipes in Fortran. This algorithm can be
700        vectorized and finds the correct bin in approx. log2(Nlayers) steps.
701        For now, use this algorithm only for TARGET_NEC_SX defined.
702      - moved the search algorithm into a separate subroutine, that is kept
703        within the same file for automatic inlining.
704      - modified catching potential errors
705    o pkg/ecco:
706      - add compile switches ALLOW_SHALLOW_ALTIMETRY and ALLOW_HIGHLAT_ALTIMETRY.
707    o model/src, pkg/autodiff, pkg/ctrl, pkg/grdchk :
708      - modifications for ALLOW_GENTIM2D_CONTROL
709      -- forward_step.F, the_main_loop.F : pass options and arrays for adjoint tapes.
710      -- load_fields_driver.F : add call to CTRL_MAP_GENTIM2D( myTime, myIter, myThid )
711      -- add xx_gentim2d0/1 in ctrl_ad_check_lev1_dir.h checkpoint_lev1_directives.h etc
712      -- use ctrl_swapffields.F (new) instead of exf_SwapFFields.F in ctrl_get_gen.F
713    o model/src:
714      - account for moist thermodynamics in (dry) potential temperature equation;
715        update results of experiments: aim.5l_cs (x2), fizhi-cs (std + aqualev)
716        and cpl_aim+ocn.
717      - also switch to standard compiler (gfortran, was using ifort previously)
718        for fizhi-cs experiments reference output.
719    o pkg/ctrl:
720      - 1st step toward generic time-varying control variable (2D) via CPP option
721        ALLOW_GENTIM2D_CONTROL
722      - note new namelist ctrl_nml_genarr in data.ctrl
723    o verification/global_ocean.cs32x15:
724      - switch off OLD_THSICE_CALL_SEQUENCE (both forward and AD code) to use new
725        thsice calling sequence and update "output.icedyn.txt" output file.
726    o pkg/ptracers:
727      - from Ryan A.: code to allow to restart a tracer at regular time interval
728        specifying a reset frequency and a reset-phase (for each tracers).
729    o pkg/thsice:
730      - implement new sequence of calls for thsice+seaice:
731          previously:   ice-Dyn,ice-Advect,ice-Thermo(thsice)
732          new sequence: ice-Thermo(thsice),ice-Dyn,ice-Advect
733      - allows (with temporary CPP option "#define OLD_THSICE_CALL_SEQUENCE"
734        in CPP_OPTIONS.h) to recover old sequence;
735      - update diagnostics for Intermediate State thsice diagnostics: now filled
736        just before advection (instead of just after advection in old sequence);
737      - update output of experiment offline_exf_seaice (standard test);
738      - in global_ocean.cs32x15 exp., postpone output.icedyn.txt update
739        by setting #define OLD_THSICE_CALL_SEQUENCE in CPP_OPTIONS.h
740    o pkg/aim_v23:
741      - use tiled array for aim_CO2 and surface wind speed for export to coupler;
742      - use standard pkg/mdsio routines to read & write CO2 pickup file;
743      - in-line S/R AIM_AIM2DYN_EXCHANGES in aim_do_physics.F;
744      - Implement new sequence of calls for seaice advection (with thsice and
745        seaice diffusion): do ice advection after ice-Thermodynamic (previously
746        was done before); change aim_do_physics.F (split the bi,bj loops block);
747      - use same CPP option (OLD_THSICE_CALL_SEQUENCE) to recover old sequence;
748    o pkg/thsice:
749      - add a missing EXCH of sIceLoad in thsice_main.F (ocean set-up) for the case
750        where just seaice diffusion is used without seaice-dynamics.
751    
752    checkpoint64c (2013/01/18)
753    o pkg/seaice:
754      - add a parameter JFNKres_tFac that can replace JFNKres_t
755        (= JFNKres_tFac*JFNKresidual before JFNK solver)
756      - add a line search option to the JFNK solver
757      - move update of u/vIce and computation of initial residual into a separate
758        routine (same file); makes the code a little easier to read (?)
759      - the line search requires computation of the residual and for some reason
760        I cannot do the update of u/vIce at the beginning of the Newton loop
761        without changing the results, so we move computation of the new residual
762        also to the end of the Newton loop, even without the line search
763    o pkg/mdsio:
764      - write missing value (corresponding to undefined array value) to meta files;
765        skip this if missing value is one (UNSET_RL would be a better value for the
766        case of undefined missing value but it's current the default missing-value);
767        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
768    o pkg/exf & thsice:
769      - for diagnostics purpose, fill-up and update Qsw array (+ fill the
770        diagnostics) even when SHORTWAVE_HEATING is #undef;
771    o verification/cfc_example:
772      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to
773        illustrate how to use it).
774    o verification/offline_exf_seaice:
775      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
776        files to only one time-record.
777      in input.thermo: narrow the 2 bands of low initial ice-concentration near
778        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
779        snapshot output; same mcPheePiston value as in thsice with
780        surf-current=0.2m/s.
781      in input.thsice: similar set-up as in input.thermo (channel with same seaice
782        initial conditions).
783    o verification/cfc_example:
784      - update file "data" with more standard choice (default rotationPeriod,
785        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
786        set deltaTFreeSurf to deltaTtracer) and update the output.
787    o pkg/layers:
788      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
789      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
790    o verification/offline_exf_seaice:
791      - set all {field}period to zero for constant-in-time forcing (not tested
792        anywhere else).
793    o verification/offline_exf_seaice:
794      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
795      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
796    o model/src:
797      - implement Finite-Volume method for (hydrostatic) presure gradient
798        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
799    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
800      - In order to be compatible with the default EVP code, this requires changing
801        the EVP code around a little; and because any small change immediately
802        breaks the lab_sea.hb87 verification experiment, the reference output is
803        updated two times (each time the remaining aggrement was only 2 digits):
804        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
805        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
806        The adjoint test lab_sea.evp also needed to be updated.
807      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
808        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
809        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
810        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
811        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
812        kept obscure, because I need to test it a little more.
813    o pkg/cheapaml:
814      - fix few incorrect type (_RL/_RS) in subroutine calls.
815    o pkg/seaice:
816      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
817        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
818    o model/src:
819      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
820        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
821        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
822    o pkg/cheapaml:
823      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
824        update output of experiment cheapAML_box.
825      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
826        and set them only in one place (cheapaml_readparms.F).
827      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
828      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
829        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
830    o model/src/the_main_loop.F:
831      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
832    o pkg/seaice:
833      - remove legacy branch code.
834      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
835    o verification/*/code*/SEAICE_OPTIONS.h:
836      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
837        SEAICE_CAP_HEFF).
838    o pkg/cheapaml:
839      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
840        to load new forcing fields.
841      - add missing "_d 0" where it's needed; + some editing (improve indentation).
842      - remove switch to "-r8" compiler option (no longer needed) in verification
843        cheapAML_box, keep same output (small trucation error differences).
844    o verification/offline_exf_seaice:
845      - add thermodynamics only test.
846    o verification/cheapAML_box:
847      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
848        keep same output (same 14 digits for cg2d).
849      - switch on "-r8" compiler option (some numerical values are missing
850        the "_d 0") and update output (only 6 digits for cg2d were preserved).
851    
852    checkpoint64b (2012/12/24)
853    o pkg/cheapaml:
854      - remove un-used variables (Qnet,EmPmR) from pickup files.
855      - store tendency of advected variables into cheapaml pickup file
856        and fix the AB-2 restart.
857    o verification/offline_exf_seaice and lab_sea adjoint:
858      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
859      - switch to 4 time steps in offline, consistent with lab_sea.
860      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
861      - update results after change of experiment seaice.
862    o pkg/seaice:
863      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
864        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
865        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
866        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
867    o model/src:
868      - add run-time parameter to select CG2D solver minimum-residual solution
869        (in case of a poor convergence).
870    o pkg/seaice/seaice_lsr.F
871      - move calculation of matrix coefficients into new
872        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
873        file; the main purpose of this change is to be able to reuse the code
874        in S/R SEAICE_PRECONDITIONER
875      - modify the computation of the residual so that the mass of sea-ice
876        is not used twice; this simplifies the calculations, but since
877        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
878        not tested in testreport---this does not affect the testreport results.
879    o verification/seaice_obcs:
880      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
881        verification/lab_sea/input.salt_plume; changes results/output.txt*
882    o model/src:
883      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
884    o pkg/seaice:
885      - improve description of parameters in seaice_fgmres.F and start
886        cleaning up the code
887      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
888        second argument
889      - add a metric based on grid cell area to SEAICE_SCALPROD; update
890        results of offline_exf_seaice.dyn_jfnk
891      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
892    o pkg/aim_v23:
893      - fix an other bug in dissipation heating (grid-cell area was missing).
894    o model/src + pkg/seaice:
895      - add global (multi-tile) linear solver for pair of tri-diagonal system
896        along X and Y lines, respectively for U and V component.
897        Note: 1) MPI and cube-exchange not yet coded.
898            2) probably not accurate for poorly conditioned / large size problem.
899      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
900        default: not compiled and not used.
901    o pkg/seaice:
902      - first attempt at a multi-threaded fgmres solver for the JFNK solver:
903        introduce bi/bj loops and use global_sum_tile_rl instead of
904        mpi_allreduce in seaice_fgmres.F
905      - improve diagnostics output for fgmres solver (seaice_fgmres.F)
906      - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
907      - add a verification experiment for JFNK in offline_exf_seaice
908    o verification:
909      - change (for now, only fwd test) offline_exf_seaice experiment:
910        use a re-entrant channel with idealized coastline (trapezoidal shape)
911        at southern boundary to explore seaice dynamics and thermodynamics
912        with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
913        secondary test (input.thsice) use thermodynamics only with SST relaxation.
914      - add seaice-dynamics only secondary test using LSR and pkg/thsice advection.
915    o pkg/exf:
916      - disable "sstExtrapol" when Nr=1
917    o verification:
918      - add new experiment "cheapAML_box" (simple 1 layer set-up from Bruno Deremble)
919        to test pkg/cheapaml.
920    o pkg/aim_v23 & pkg/shap_filt:
921      - fix dissipation heating (erroneous gravity multiplication factor).
922    o pkg/seaice:
923      - remove unused field pressPre from jfnk solver
924      - rename two subroutines in seaice_preconditioner.F
925    o eesupp/src:
926       - S/R MDSFINDUNIT avoids reserved unit numbers (scrUnit1, eeDataUnit ...)
927    o pkg/seaice/seaice_preconditioner.F: fix preconditioner once again
928       - remove wrong parts of the rhs and the lhs (were in there
929         because I did not understand the concept of this preconditioner)
930       - add an exchange between u- and v-sweep. This increases communication
931         by a factor of two but improves the convergence of jfnk. Ideally,
932         one would like the u- and v-sweep to be independent. So far within
933         undocumented ifdefs
934       - reorganize the extra computations for printing the residuals
935    o tools/genmake2:
936      - comment out the "mpif.h" include in NetCDF test programm (for MPI built)
937        since it's not necessary (and was preventing to use MNC in some cases).
938    
939    checkpoint64a (2012/11/16)
940    o pkg/autodiff:
941      - improve pkg-internal logical parameter switch (inAd/inFwd mode) so that
942        autodiff_readparms.F no longer depends on calling order (within
943        packages_readparms.F) and no longer requires to include ${PKG}_PARMS.h):
944        rename param turnFreeDriftInAdMode to SEAICEuseFREEDRIFTswitchInAd
945        and change param SEAICEuseDYNAMICSinAdMode to SEAICEuseDYNAMICSswitchInAd.
946    o pkg/obcs:
947      - adding tidal velocity forcing capability to obcs
948        for usage example, see verification/seaice_obcs/input.tides
949    o pkg/seaice:
950      - turn the LSR-relaxation parameters WFAU/V into runtime parameters
951        SEAICE_LSRrelaxU/V
952      - introduce runtime parameter SEAICEetaZmethod (=0 by default)
953    o pkg/aim_v23:
954      - implement heating from friction (bottom friction and stratospheric drag).
955    o pkg/shap_filt:
956      - fix diagnostic "SHAP_dKE" (was 2 time smaller); implement heating from
957        dissipation but only for Shap_funct=2, active when addFrictionHeating=T.
958    o model/src:
959      - move AddMass common block from DYNVARS.h to FFIELDS.h; allow to read-in
960        time-constant addMass field from file (addMassFile);
961      - support for heating due to friction (and Kinetic Energy dissipation):
962        add option, run-time switch and 3-D field array + support code ; each pkg
963        or S/R can add heating contribution (if there is a sink of KE); the sum is
964        accounted for as a Temperature tendency term (EXTERNAL_FORCING_T).
965    o pkg/seaice:
966      - complete merge of ITD code into seaice_growth.F
967        from MITgcm_contrib/torge/itd/code/
968        no verification so far, but Torge Martin tested
969        "1-D test case and Beaufort set up;
970        deliver okay results after 1 model year."
971      - complete merge of SEAICE_SIZE.h into all relevant routines
972      - move computation of eta at Z-points into calc_viscosities
973        + introduce global field etaZ
974        + add different methods for computing etaZ, for now the old
975          method (simple averages of eta to Z-points) is hardwired
976        + replace etaMeanZ by etaZ in seaice_lsr, seaice_calc_residual,
977          seaice_preconditioner
978      - simplify computations for SEAICE_ZETA_SMOOTHREG
979      - seaice_preconditioner:
980        + replace one remaining press by pressLoc (mistake)
981        + adjust printing of residuals
982      - improve I/O of diagnostics of JFNK in seaice_jfnk.F:
983        + add (SEAICE.h) and rename some counters (initiliased in
984          seaice_init_fixed.F)
985        + add _BEGIN/END_MASTER (myThid)  around print statements
986        + print total number of iterations and failures over SEAICE_monFreq
987          interval to STDOUT
988      - move control over output-messages by fgmres to seaice_jfnk to save
989        some operations
990      - move resetting initial guess for fgmres outside of seaice_fgmres_driver
991        in order to make restarts with sol .ne. zero (fgmres with restarts)
992        (seaice_jfnk.F, seaice_fgmres.F)
993      - seaice_calc_l/rhs.F: replace maskW/S by maskInW/S; this fixes
994        a serious convergence problem when open boundaries are involved
995    o pkg/ggl90: fix computation of control volumes for the case of
996      ALLOW_GGL90_HORIZDIFF (probably not used very often): move control volumes
997      up half a grid cell from C-centered to W-centered (pointed out by C. Eden)
998    o pkg/seaice: simplify seaice_evp by avoiding use of extra fields u/vIceC
999    o pkg/autodiff
1000      - Add inAdMode switch for SEAICEuseDYNAMICS:
1001        SEAICEuseDYNAMICSinAdMode
1002        (extend logic in ADAUTODIFF_INADMODE_SET)
1003    o pkg/seaice
1004      - Step 1 of merging ice-thickness distribution (ITD) code from
1005        MITgcm_contrib/torge/itd/ (author: Torge Martin)
1006        The code implements concept laid out in Thorndike et al. (1975);
1007        code is enabled via CPP flag SEAICE_ITD
1008        nITD (in SEAICE_SIZE.h) defines number of ice thickness categories;
1009        code is not complete yet!!
1010      - SEAICE_SIZE.h now included in almost all seaice routines
1011    o verification (using seaice):
1012      - switch back seaice-dynamics (+ lower SOLV_MAX_ITERS) in ADM exp.
1013        global_ocean.cs32x15.seaice ; update results.
1014      - compile B-grid dynamics in FW test exp 1D_ocean_ice_column ;
1015      - compile C-grid dynamics with #define SEAICE_ALLOW_JFNK in FW test exp
1016        offline_exf_seaice (previously compiling B-grid).
1017    o pkg/exf:
1018      - fix some STOP conditions in exf_check.F (from Aug 28, modifs did not allow
1019        to specify neither just 1 comp of wind or wind-stress, nor no surface momentum
1020        forcing): just replace CPP option ALLOW_ATM_WIND with run-time param useAtmWind.
1021    o pkg/layers (adjust changes from Sept 19):
1022      - do snap-shot output and fill diagnostics from inside iLa loop (layers_calc.F)
1023        this allows to remove "layers_maxNum" dimension from all layers arrays.
1024    o pkg/layers (adjust changes from Sept 19):
1025      - remove ALLOW_LAYERS_OUTPUT ; fix snap-shot and time-ave output ;
1026      - snap-shot extended to all type of layers (not just the 1rst type);
1027      - remove layers variables when corresponding CPP option is undef.
1028    o pkg/layers:
1029      - rename pkg/layers variable and add new output (layer exist & un-weighted
1030        velocity in layer)
1031    o pkg/seaice:
1032      - simplify (?) ocean-drag coefficent computations by using
1033        the same routine in all three solvers (saves some code lines)
1034      - remove global fields DRAGA and DRAGS from C-grid code and
1035        declare them locally in lsr.F (the only place where they are
1036        still used)
1037      - update AD output of lab_sea.evp (very sensitive anyway).
1038  o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics  o pkg/seaice: add Jacobian-free Newton Krylov solver for ice dynamics
1039    (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK    (Lemieux et al. 2010, 2012). Turn on with the usual SEAICE_ALLOW_JFNK
1040    and SEAICEuseJFNK=.true. A few things to note:    and SEAICEuseJFNK=.true. A few things to note:
# Line 12  o pkg/seaice: add Jacobian-free Newton K Line 1043  o pkg/seaice: add Jacobian-free Newton K
1043      orthogonalization method. Needs to be replaced. Original code      orthogonalization method. Needs to be replaced. Original code
1044      from J.-F. Lemieux      from J.-F. Lemieux
1045    - preconditioner for FGMRES is a stripped down version of LSOR    - preconditioner for FGMRES is a stripped down version of LSOR
1046    - SOLV_MAX_ITERS is now used for LSOR as a solver and as a    - SOLV_MAX_ITERS is now used for LSOR as a solver and as a
1047      preconditioner. For the preconditioner, the default is set to 10.      preconditioner. For the preconditioner, the default is set to 10.
1048    - Jacobian times vector is computed with finite differences    - Jacobian times vector is computed with finite differences
1049    - marginally related to JFNK-solver: add a smooth regularization for    - marginally related to JFNK-solver: add a smooth regularization for

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