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revision 1.128 by heimbach, Thu Feb 6 22:43:09 2003 UTC revision 1.262 by edhill, Thu Feb 26 22:39:55 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o change MNC call locations and add coordinate attributes
7    o mask vorticity at the corner ; affects global_ocean.cs output
8    o fix ini_curvilinear_grid ; test CS experiments with mpi
9    o aim.5l_cs: modify sea-ice fraction input file ; update output
10    o exf: Adding simple range check routine for exf fields after read
11    
12    checkpoint52k_post
13    o removed top-level directory "diags"
14      - we migrated these functions to pkg/timeave a long time ago
15    o fixed bug introduced in pkg/monitor
16    o accuracy ctrlprec = 32 insuffient for gradient checks using
17      averaged fields (I/O via cost_averages)
18      -> use ctrl.h in active_file*.F to control I/O precision.
19    o paramter list of CALL ADTHE_MAIN_LOOP
20    o added initial do_the_model_io to ecco
21    o set all ...Freq to zero after cost_final
22      taveFreq, dumpFreq, pChkptFreq
23    o MAIN and ECCO differentiability restored
24    
25    checkpoint52j_post
26    o fix nchklev in tamc.h for global_ocean...
27    o Bringing flow and store directives up-to-date
28    o Really weird thing!
29      call do_the_model_io from the_main_loop with parameters
30      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
31      TAF places a faulty re-call of initialise_varia
32      after cost_final call which should not be there!
33    checkpoint52j_pre
34    
35    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
36      error messages
37    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
38    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
39      debug output
40    o modfied mdsio_writefield.F to handle non-global files under exch2
41    o update AIM Cubed-Sphere exp (aim.5l_cs):
42      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
43    o update AIM Equatorial Channel exp:
44      use standard aim_v23 pkg and change the SST fields to be more realistic.
45    o globalFile now works with exch2
46    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
47      mon_vort3.F to make exch2 friendly with >1 tile per cube face
48    o limit timeave output for hi-res integrations
49    
50    checkpoint52i_post
51    o removed CPP_EEOPTIONS.h from verification/*/code
52    o updated the tiling for global_ocean_pressure
53    checkpoint52i_pre
54    
55    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
56      the old pkg/aim).
57    
58    checkpoint52h_pre
59    o shortened offending lines in exch2_send_rx?.template
60    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
61    o genmake2: add build & execute test for NetCDF code
62    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
63      old grid files, moved CPP_EEMACROS.h to pkg/exch2
64    o added useSingleCPUIO flag to monitor.F and mon_out.F
65    o added temporary hack for sea-ice dynamics on the cube:
66      metric terms are ignored and it is assumed that
67      there is no sea-ice on cube faces 1, 2, 4, and 5.
68    
69    checkpoint52f_post
70    o added exch2 cube routines to pkg/exch2
71    o modified hs94.cs-32x32x5 to use it
72    o added new grid files to hs94.cs-32x32x5
73    checkpoint52f_pre
74    
75    checkpoint52e_post
76    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
77      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
78    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
79      to work with implicit vertical advection and AB ;
80    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
81    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
82     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
83    checkpoint52e_pre
84    
85    o fix bug in impldiff when Nr=1 or Nr=2.
86    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
87    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
88    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
89      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
90    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
91    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
92    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
93    
94    checkpoint52d_post
95    o re-tiled many expts to allow comparison in multi-processor mode
96      - updated output accordingly
97      - changed hs94.128x64x5 to use intial T from file rather than use the
98        random number generator
99    o add infrastructure in model routines for fizhi and gridalt packages
100    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
101    o changes to permit hi-res, cubed-sphere, configuration
102      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
103      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
104      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
105        of surface winds for the cube
106      (A verification experiment, based on global_ocean.cs32x15, but with
107       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
108       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
109       complete with example surface forcing files and matlab scripts to look
110       at the output and compare it with that of global_ocean.cs32x15.)
111    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
112       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
113       to conform to the common rule.
114    o check-in the first version of the coupler + interfaces for multi-components
115       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
116       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
117       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
118       - ocean and atmos. share the same horizontal grid (no interpolation).
119       - exchanges between component and coupler is done in forward_step
120    o new verification experiment, cpl_aim+ocn:
121       coupled ocean - AIM atmosphere on cs32 grid.
122    
123    checkpoint52d_pre
124    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
125    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
126    
127    checkpoint52c_post
128    o Fixing OPTIONS files for use of exf:
129      - ALLOW_ECCO not needed
130      - ECCO_CPPOPTIONS.h should not be included from
131        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
132        as has been the case in the past
133      - All cal/exf related options are currently set in
134        single header file. Should remain so until we
135        agree on a consistent new policy.
136    o Removed all CPP options for cal package.
137      cal has no more CPP options.
138    o modified STOREs in GAD_ADVECTION
139    o corrected key comp. for passkey
140    
141    checkpoint52b_post
142    o new version: "thsice" of thermodynamic sea-ice pkg:
143     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
144     - modify fluxes but do not change theta directly;
145     - light cleaning of bulk_force pkg (still needed with thsice).
146     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
147       + output_thsice.txt to test thsice & bulk_force pkgs.
148    o put back grid & coriolis monitor output.
149    checkpoint52b_pre
150    
151    o call "do_the_model_io" at the beginning (=> dump initial state)
152    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
153    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
154      (need info on NUMBER_OF_PTRACERS)
155    o missing PTRACERS headers in some routines
156    o default tamc.h in pkg/autodiff supposed to crash
157      to ensure proper customization
158    
159    checkpoint52a_post
160    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
161      - moved surfaceTendencyTice from pkg/seaice to main code
162      - subroutine FREEZE_SURFACE now limits only surface temperature
163        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
164        => new output.txt for global_ocean.cs32x15 & global_with_exf
165      - keep the old version of FREEZE for backward compatibility;
166        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
167      - corresponding modifs for TAF directives
168    o added surface flux output variables to TIMEAVE_STATVARS
169    o time-averaged output for pkg/ptracers
170    o fix problem with ECCO-related divided adjoint
171      snapshot file was missing some ad-variables,
172      but no warning issued by TAF
173    
174    checkpoint52a_pre
175    o some bug fixes for #undef REAL4_IS_SLOW
176    
177    checkpoint52 = ecco_c52_e35
178    o after testing adjoints of checkpoint51u_post
179    
180    checkpoint51u_post
181    o this is the post-merge tag of the ecco-branch
182      (needs another clean checkout and re-testing)
183    o various natl_box_adjoint configs and results
184      but no input fields
185    o obcs adjoint not yet merged!
186    o adding ECCO global 1x1 and 2x2 degree configs
187    o updated/extended some store directives for seaice
188    o pkg/ecco now containes ecco-specific part of cost function
189    o top level routines the_main_loop, forward_step
190      supersede those in model/src/
191      previous input data.cost now in data.ecco
192      (new namelist ecco_cost_nml)
193    o in ctrl/ cleaned some cross-dependencies and updated CPP options
194    
195    checkpoint51t_post
196    o this is the pre-merge tag of the ecco-branch
197    
198    checkpoint51s_post
199    o cleanup: removed various obsolete #define-s
200    o pkg/grdchk
201      - renamed 'ph-grd 3' to 'grad-res'
202      - merged from ecco-branch
203        (remaining bug fixes for obcs gradient checks)
204      - additional high-precision output for testreport
205        (grep for 'precision_grdchk_result')
206    
207    checkpoint51r_post
208    o cleaned up or removed CPP_OPTIONS.h files
209    o updated results for some of the tests to reflect the new
210      optfiles (-ieee: -O0 instead of -O3)
211    
212    checkpoint51q_post
213    o cd_code:
214      - moved cd_scheme.F -> cd_code_scheme.F
215      - separate read_checkpoint from cd_code_ini_vars.F
216      - separated cd_code part from write_checkpoint
217      - updated AD_SOURCE, generated .flow
218      - added CD_CODE_VARS.h to the_main_loop
219      - Moving cd_code specific store dir.s to pkg/cd_code
220    o ctrl package totally restructured
221      - pack/unpack now optional and decoupled from
222        xx_/adxx_ I/O
223      - ctrl_pack/unpack cleaned
224        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
225      - confined inclusion of AD_CONFIG.h to where necessary.
226    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
227    
228    checkpoint51p_post
229    o create initial cd_code package
230      - WARNING: the initialization of fields within packages
231        is broken because INI_FIELDS (where READ_CHECKPOINT is
232        called) is called *before* PACKAGES_INIT_VARIABLES.
233        This seems to be backwards since
234        1) its important to initially zero the entire field including
235           the "halo" region
236        2) zeroing needs to be done *before* reading pickup info
237           and the pickup call might or might not happen in any
238           particular run
239      - this needs an overhaul for R2
240    o cleanup verification/*/code/GMREDI_OPTIONS.h
241    o cleanup testreport
242    
243    checkpoint51o_post
244    o bringing AD-related verif's up to date with genmake2
245      - carbon/
246      - global_ocean.90x40x15/
247      - hs.94.1x64x5/
248      - (front_relax/ )
249    o (more) consistent directory structure for AD-related verif.'s
250    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
251    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
252    o bug fix in find_alpha.F for MDJWF:
253      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
254        change rho -> rho-rhoConst
255      - replace call find_rho to find_rhonum
256    o initialisation of rFlx extended to full array (required by TAF)
257      and shifted to thermodynamics
258    o removed PTRACERS.h in ptracers routine
259    o added surfacetendencyPtr to S/R parameter list pracers_forcing
260    o Correcting initialisations for fVerU, fVerV.
261    o helping TAF to recognize dependency on kUp for
262      fVerU, fVerV
263    o Replacing delZ by delR in pkg/ctrl/
264    checkpoint51o_pre
265    
266    o undid all of cp51 pending some cleanups and discussion
267    o added the [#include "AD_CONFIG.h"] statement to all files that need
268       it for adjoint/tl #defines
269     o re-worked the build logic in genmake2 to support AD_CONFIG.h
270     o removed tools/genmake since it no longer works
271    
272    checkpoint51n_post
273    o modifications to make FREEZE flux visible to pkg/kpp
274      - moved surfaceTendencyTice from pkg/seaice to main code
275      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
276      - subroutine FREEZE now limits only surface temperature
277        (this means new output.txt for global_ocean.90x40x15,
278         global_ocean.cs32x15, and global_with_exf)
279    o added surface flux output variables to TIMEAVE_STATVARS
280    
281    checkpoint51n_pre
282    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
283    o added [#include "AD_CONFIG.h"] to all files that use the following
284      defines:
285      - ALLOW_ADJOINT_RUN
286      - ALLOW_TANGENTLINEAR_RUN
287      - ALLOW_ECCO_OPTIMIZATION
288    
289    checkpoint51m_post
290    o incorporating changes to get TAMC/TAF working in genmake2
291      - added new TAMC/TAF targets to the Makefile
292      - various cleanups related to package handling
293      - these changes should have no impact on the forward model
294    
295    checkpoint51l_post
296    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
297     - faster algorithm for cal_addtime.F
298     - higher precision arithmetic, where needed
299     - pkg/exf *startdate variables changed from calendar date to
300       model integration time
301    
302    checkpoint51l_pre
303    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
304    o enable to apply restoring on S & T only in a latitude band.
305    o update output (external_forcing_surf modif. change truncation errors)
306       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
307    
308    checkpoint51k_post
309    o change default to: useNHMTerms=.FALSE.
310     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
311       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
312     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
313        exp1, ideal_2D_oce
314     - change data file of oceanic exp (leave the results unchanged for now)
315       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
316    o set gravitySign automatically according to the vertical coordinate used
317      (and change sign: back to "logical" value: +1 when R increases downward)
318    o added an include barrier to the default CPP_OPTIONS.h and
319      removed the #include "PACKAGES_CONFIG.h" from it
320    o fix a bug in mom_fluxform (from chk51j_post)
321    
322    checkpoint51j_post
323    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
324    o adjusted some flow directives (dynamics, thermodynamics)
325    o added cubed-sphere case to test cost function
326    o heckpoint_lev?_directives.h now include
327      pkg-specific directives, whenever those are enabled.
328    o Moving pkg-specific flow directives to corresponding pkg
329      Moving pkg-specific differentiation list to corresponding pkg
330      Moving pkg-specific checkpoint-lev storing to corresponding pkg
331      ---> conventions are
332           - pkg_ad.flow
333           - pkg_ad_diff.list
334           - pkg_ad_check_lev?_dir.h
335    
336    checkpoint51i_post
337    o merge of the branch-genmake2
338      - knowingly breaks the older genmake
339      - automatic generation of all ALLOW_${PKG_NAME} defines
340      - new testreport supersedes older testscript
341    o large number of package inclusion and header cleanups
342    checkpoint51i_pre
343    
344    o new output for adjoin of global ocean vector invariant
345    o fix for checkpoint of thermodynamic seaice and bulk_force
346    o Steph gchem various cleanups
347    
348    checkpoint 51h_pre
349    o fixed some single quotes
350    o modify gchem pkg to be more versatile
351    o modifications to clean up dic pkg
352    o add pkg/cfc
353    
354    checkpoint51g_post
355    o provide links for ARPACK and ADM*TLM
356    o start removing verification/vero/
357    o update AD-related stuff
358      (in particular some IF-statements in model/src/ routines)
359    o adding to verification/global_ocean.90x40x15/ adjoint of
360      vector invariant setup
361    
362    checkpoint51f_post
363    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
364    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
365      of tracer Green's fucntions for ocean inversion project.
366    
367    checkpoint51f_pre
368    o Added on-the-fly spatial interpolation capability
369        "USE_EXF_INTERPOLATION" to pkg/exf.
370      - This is a temporary Cartesian-grid hack until
371        the super-duper ESMF coupler becomes available.
372      - See verification/global_with_exf/README for usage example.
373      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
374        flags and modified pkg/seaice accordingly.
375    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
376        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
377        non-local transport term.
378    
379    checkpoint51e_post
380    o pkg/mom_vecinv:
381      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
382      - add time-ave diagnostic of vorticity advection.
383    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
384    o atmospheric geopotential: - include water vapor effect;
385                                - use p^kappa in p* scaling.
386    o land pkg: read initial state from files.
387    o AIM : add stratospheric drag in the upper level
388    
389    checkpoint51d_post
390    o change function ILNBLNK (=> last non-blank char.) to return zero
391      (instead of the string length) when the string. char is empty
392    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
393    o modif's to restore TAMC compatibility
394      - avoid "_d" constructs in PARAMETER declarations
395      - avoid interrupting lines by comment lines
396    o Use cluster local disks for purely local I/O
397      vs. globally visible disks needed for ctrl stuff
398      (merged from ecco-branch)
399      - new active_file_loc... and mdsio_..._loc routines
400      - affected packages: autodiff, ctrl, grdchk, mdsio
401    
402    checkpoint51c_post
403    o introducing integer flag debugLevel
404      - debLevZero: suppress all output
405      - debLevA: standard
406      - debLevB: equivalent to current debugMode=.TRUE.
407    o introducing pathname variable mdsioLocalDir for mdsio
408      that can be specified at runtime
409      (relevant for cluster I/O to local disk)
410    `
411    >>>checkpoint51b_post
412    adjoint of ptracers
413    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
414    o extended state in checkpoint_lev?, etc.
415    o alternative ctrl/cost with tr1 or ptracer
416    o new comlev1_bibj_ptracers
417    o new ptracers.flow
418    o made ptracers_forcing same as external_forcing_s
419    o added verification for adjoint with ptracers
420      - adm. grdchk fail so far
421      - tlm. grdchk OK
422      - checked tapelev/comlev recomputations: OK
423    <<<checkpoint51b_pre
424    
425    checkpoint51a_post
426    o added code for biogeochemistry package
427      - new pkgs: dic, gchem
428      - new subroutine in ptracers
429    o modify code for biogeo packages
430      - in model/src and pkg/ptracers
431    
432    checkpoint51
433    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
434      - autodiff, ctrl, exf, grdchk, seaice
435      kept separate packages
436      - cost, ecco, obcs
437    o updating verification/internal_wave, verification/lab_sea
438      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
439    
440    checkpoint50i_post
441    o Preparing next differentiable checkpoint and sync
442      of MAIN vs. ecco-branch
443      - 1st step: this one is differentiable
444      - 2nd step: next(! not this) checkpoint will have updated packages
445                  from ecco-branch)
446    
447    checkpoint50h_post
448    o new package "land": provide surface BC for AIM.
449    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
450    o AIM: use true log-P extrapolation for near surface temp (= as in
451        F.Molteni paper) ; update aim.5l_cs output.
452    o New variable in PARM03 for more flexible pickups
453    o somewhat cleaned package initialisation sequence for
454      ctrl/ cost/ ecco/ in packages_... routines
455    
456    checkpoint50g_post
457    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
458      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
459      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
460        made the default because of faster convergence than ADI
461    
462    checkpoint50f_post
463    o exf totally restructured
464      - replaced all exf_set_ routines by one generic exf_set_gen.F
465        and made sure it's still differentiable
466      - split exf_getffields.F into new exf_bulkformulae.F
467      - exf_inscal_/exf_outscal_ suffixes consistent with field names
468      - updated adjoint/makefile and relevant verif. accordingly
469    
470    checkpoint50f_pre
471     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
472          + change Evap over land. (update aim.5l_cs output)
473     o added missing .cvsignores and made uniform across expts
474     o changed configuration of tidal_basin_2d expt
475     o added pkg/debug functions for tracing code in fatal crashes
476     o tidied pkg/monitor to use MONITOR_OPTIONS.h
477     o new fn in pkg/monitor to stop model if solution grows too big
478     o removed lots of single quotes from comments
479    
480    checkpoint50e_post
481    o make KPP work with PTRACERS
482     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
483       nearly a copy of kpp_transport_s
484     - there is no analogue to SurfaceTendencyS, so I have to use
485       gPtr(of the surface layer) instead
486    o add a new platform SunFire+mpi (SunFire 15000) to genmake
487    checkpoint50e_pre
488    
489    checkpoint50d_post
490    o change kpp output from multiple-record state files to single-record state
491      files analogous to write_state.F
492    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
493      analogous to the cg2d-related output.
494    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
495      so that writing to internal file fn (with length 512) fails.
496    checkpoint50d_pre
497    
498    checkpoint50c_post
499    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
500    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
501    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
502    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
503    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
504    
505    checkpoint50c_pre
506    Merging from release1_p13:
507    o bug fix for pkg/seaice dynamic solver
508    o Added SEAICE_initialHEFF to pkg/seaice
509    
510    checkpoint50b_post
511    o store u*,v* in gU,V instead of in guNm1,gvNm1
512    o in order to put the momForcing out of the Adams-Bashforth:
513      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
514      to timestep.F
515    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
516    o re-generate output for highly sensitive test-exp:
517       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
518    
519    checkpoint50b_pre
520    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
521    o corrected CPP option mismatch in exf_Bulk... functions for case
522      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
523    
524    checkpoint50a_post
525    o Bug fix for merging between c50 and KPP.
526      ikey was passed from thermodynamics to kpp_calc via
527      common block rather than being recomputed in kpp_calc,
528      in contradiction with new key itdkey.
529      New key ikppkey created, and tamc.h headers updated.
530    
531    checkpoint50
532    - 2nd step of merge with ecco-branch:
533      merge changes in ecco-branch back into main trunk
534    - bug fix in find_alpha
535    - more storing in gmredi_calc_tensor.F, kpp_routines.F
536    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
537    - merged some sliced AD support routines
538    
539    checkpoint49
540    merged from ecco-branch:
541    o exf:
542      - Enable initialisation of forcing fields to constant
543        (runtime) values.
544      - in exf_getffields.F
545        Reduce i-/j-loop to interior domain, discarding overlaps.
546        That also fixes wrong TAF-key computations for key_1, key_2
547        with bulf formulae.
548      - exf_init.F modify #ifdef for exf_init_evap
549      - exf_getffieldrec.F, ctrl_getrec.F
550        The following INT-usages are not safe:
551          fldsecs  = int(fldsecs/fldperiod)*fldperiod
552          fldcount = int(fldsecs/fldperiod) + 1
553        and were modified.
554    o autodiff: checkpoint_lev...
555      - updated storing for bulk formulae (some arrays were missing)
556      - added state for seaice package
557      - synchronized with main branch
558    o DIVA:
559      Modif.s in
560      - the_main_loop.F
561      - the_model_main.F
562      and added cost_final_restore.F cost_final_store.F
563      o With these changes, it is possible to fully separate
564        the first forward run to compute the cost function (mdthe_main_loop)
565        and adjoint runs over individual DIVA intervals (adthe_main_loop)
566        into separate model executions.
567        This enables better tuning of DIVA to given queue sizes.
568      o Loss of cost function value in consecutive DIVA runs is
569        fixed by storing to 'costfinal' file.
570      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
571        beginning/end of adjoint integration is accounted for.
572      The current changes apply to TAF-1.4.26.
573      TAF has one remaining bug, requiring one manual change
574      (see MITgcm manual).
575    o cal: synchronized between MAIN and ecco-branch
576    
577    checkpoint48i_post
578    o Changes to restore differentiability of code w.r.t. previous tag
579      (mostly adding new routines to make list and replacing
580      pressure by totPhiHyd).
581    o Updated and merged grdchk package
582      - has both ADM and TLM checks
583      - works for single- and multi-proc.
584      - output cleaned
585      - worked successfully for parallel DIVA
586    o genmake:
587      - Adding -platform=SP4
588      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
589    o Modif. for DIVA:
590      ctrl_unpack should not be called in intermediate DIVA interval.
591      (similar thing would apply for active files such as
592      tbar, sbar, psbar, which should not be reinitialised;
593      only relevant for ecco-branch)
594    
595    checkpoint48h_post
596    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
597    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
598    o Added SEAICE_initialHEFF to pkg/seaice
599    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
600    
601    checkpoint48g_post
602    --- EOS:
603    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
604      store total Potential in totPhyHyd for diagnostics & EOS.
605    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
606    --- Pressure/geopotential gradient:
607    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
608    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
609      ( changes results of global_ocean_pressure )
610    o NLFS + z-coord.: add eta*Rho' contribution.
611    o accurate phiHyd when using interface-W at the middle between 2 centers
612     ( changes results of ideal_2D_oce )
613    o includes r* 2nd term in potential gradient.
614    
615    checkpoint48f_post
616    Merging from release1_p12:
617    o Modifications for using pkg/exf with pkg/seaice
618      - improved description of the various forcing configurations
619      - added basic radiation bulk formulae to pkg/exf
620      - units/sign fix for evap computation in exf_getffields.F
621      - updated verification/global_with_exf/results/output.txt
622    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
623      (SBO) core products, including oceanic mass, center-of-mass,
624      angular, and bottom pressure (see pkg/sbo/README.sbo).
625    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
626      to avoid negative values in shallow regions.
627      - updated verification/natl_box/results/output.txt
628      - updated verification/lab_sea/results/output.txt
629    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
630    o Added useSingleCpuIO option (see PARAMS.h).
631    o Updated useSingleCpuIO option in mdsio_writefield.F to
632      work with multi-field files, e.g., for single-file pickup.
633    o pkg/seaice:
634      - bug fix in growth.F: QNET for no shortwave case
635      - added HeffFile for specifying initial sea-ice thickness
636      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
637    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
638      kpp_transport_t.F, forward_step.F, and the_main_loop.F
639    o pkg/seaice:
640      - adjoint-friendly modifications
641      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
642    
643    checkpoint48e_post
644    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
645    o dynamics: change definition of computational domain & adapt mom_fluxform
646      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
647    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
648        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
649        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
650        global_ocean.90x40x15 global_with_exf global_ocean_pressure
651        inverted_barometer solid-body.cs-32x32x1
652      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
653    
654    checkpoint48d_post
655    o in preparation for r*:
656     a) use pre-computed gradient of hydrostatic potential:
657        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
658     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
659        => affects results of glob_oce_pressure (different truncation error)  
660      update output.txt of ideal_2D_oce & global_ocean_pressure
661    
662    checkpoint48d_pre
663    o in preparation for r*:
664      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
665      pass the 2 comp. of the grad. as arguments to momentum S/R.
666      but for the moment, only used if it does not change the results.
667    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
668    
669  checkpoint48c_post  checkpoint48c_post
670  Modifications in treatment of initial flux forcing controls  Modifications in treatment of initial flux forcing controls
671  to avoid extra storing of flux fields.  to avoid extra storing of flux fields.

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