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revision 1.26 by adcroft, Mon Apr 10 14:41:52 2000 UTC revision 1.211 by jmc, Sun Nov 23 00:44:11 2003 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint52b_pre
7    
8    o call "do_the_model_io" at the beginning (=> dump initial state)
9    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
10    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
11      (need info on NUMBER_OF_PTRACERS)
12    o missing PTRACERS headers in some routines
13    o default tamc.h in pkg/autodiff supposed to crash
14      to ensure proper customization
15    
16    checkpoint52a_post
17    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
18      - moved surfaceTendencyTice from pkg/seaice to main code
19      - subroutine FREEZE_SURFACE now limits only surface temperature
20        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
21        => new output.txt for global_ocean.cs32x15 & global_with_exf
22      - keep the old version of FREEZE for backward compatibility;
23        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
24      - corresponding modifs for TAF directives
25    o added surface flux output variables to TIMEAVE_STATVARS
26    o time-averaged output for pkg/ptracers
27    o fix problem with ECCO-related divided adjoint
28      snapshot file was missing some ad-variables,
29      but no warning issued by TAF
30    
31    checkpoint52a_pre
32    o some bug fixes for #undef REAL4_IS_SLOW
33    
34    checkpoint52 = ecco_c52_e35
35    o after testing adjoints of checkpoint51u_post
36    
37    checkpoint51u_post
38    o this is the post-merge tag of the ecco-branch
39      (needs another clean checkout and re-testing)
40    o various natl_box_adjoint configs and results
41      but no input fields
42    o obcs adjoint not yet merged!
43    o adding ECCO global 1x1 and 2x2 degree configs
44    o updated/extended some store directives for seaice
45    o pkg/ecco now containes ecco-specific part of cost function
46    o top level routines the_main_loop, forward_step
47      supersede those in model/src/
48      previous input data.cost now in data.ecco
49      (new namelist ecco_cost_nml)
50    o in ctrl/ cleaned some cross-dependencies and updated CPP options
51    
52    checkpoint51t_post
53    o this is the pre-merge tag of the ecco-branch
54    
55    checkpoint51s_post
56    o cleanup: removed various obsolete #define-s
57    o pkg/grdchk
58      - renamed 'ph-grd 3' to 'grad-res'
59      - merged from ecco-branch
60        (remaining bug fixes for obcs gradient checks)
61      - additional high-precision output for testreport
62        (grep for 'precision_grdchk_result')
63    
64    checkpoint51r_post
65    o cleaned up or removed CPP_OPTIONS.h files
66    o updated results for some of the tests to reflect the new
67      optfiles (-ieee: -O0 instead of -O3)
68    
69    checkpoint51q_post
70    o cd_code:
71      - moved cd_scheme.F -> cd_code_scheme.F
72      - separate read_checkpoint from cd_code_ini_vars.F
73      - separated cd_code part from write_checkpoint
74      - updated AD_SOURCE, generated .flow
75      - added CD_CODE_VARS.h to the_main_loop
76      - Moving cd_code specific store dir.s to pkg/cd_code
77    o ctrl package totally restructured
78      - pack/unpack now optional and decoupled from
79        xx_/adxx_ I/O
80      - ctrl_pack/unpack cleaned
81        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
82      - confined inclusion of AD_CONFIG.h to where necessary.
83    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
84    
85    checkpoint51p_post
86    o create initial cd_code package
87      - WARNING: the initialization of fields within packages
88        is broken because INI_FIELDS (where READ_CHECKPOINT is
89        called) is called *before* PACKAGES_INIT_VARIABLES.
90        This seems to be backwards since
91        1) its important to initially zero the entire field including
92           the "halo" region
93        2) zeroing needs to be done *before* reading pickup info
94           and the pickup call might or might not happen in any
95           particular run
96      - this needs an overhaul for R2
97    o cleanup verification/*/code/GMREDI_OPTIONS.h
98    o cleanup testreport
99    
100    checkpoint51o_post
101    o bringing AD-related verif's up to date with genmake2
102      - carbon/
103      - global_ocean.90x40x15/
104      - hs.94.1x64x5/
105      - (front_relax/ )
106    o (more) consistent directory structure for AD-related verif.'s
107    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
108    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
109    o bug fix in find_alpha.F for MDJWF:
110      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
111        change rho -> rho-rhoConst
112      - replace call find_rho to find_rhonum
113    o initialisation of rFlx extended to full array (required by TAF)
114      and shifted to thermodynamics
115    o removed PTRACERS.h in ptracers routine
116    o added surfacetendencyPtr to S/R parameter list pracers_forcing
117    o Correcting initialisations for fVerU, fVerV.
118    o helping TAF to recognize dependency on kUp for
119      fVerU, fVerV
120    o Replacing delZ by delR in pkg/ctrl/
121    checkpoint51o_pre
122    
123    o undid all of cp51 pending some cleanups and discussion
124    o added the [#include "AD_CONFIG.h"] statement to all files that need
125       it for adjoint/tl #defines
126     o re-worked the build logic in genmake2 to support AD_CONFIG.h
127     o removed tools/genmake since it no longer works
128    
129    checkpoint51n_post
130    o modifications to make FREEZE flux visible to pkg/kpp
131      - moved surfaceTendencyTice from pkg/seaice to main code
132      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
133      - subroutine FREEZE now limits only surface temperature
134        (this means new output.txt for global_ocean.90x40x15,
135         global_ocean.cs32x15, and global_with_exf)
136    o added surface flux output variables to TIMEAVE_STATVARS
137    
138    checkpoint51n_pre
139    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
140    o added [#include "AD_CONFIG.h"] to all files that use the following
141      defines:
142      - ALLOW_ADJOINT_RUN
143      - ALLOW_TANGENTLINEAR_RUN
144      - ALLOW_ECCO_OPTIMIZATION
145    
146    checkpoint51m_post
147    o incorporating changes to get TAMC/TAF working in genmake2
148      - added new TAMC/TAF targets to the Makefile
149      - various cleanups related to package handling
150      - these changes should have no impact on the forward model
151    
152    checkpoint51l_post
153    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
154     - faster algorithm for cal_addtime.F
155     - higher precision arithmetic, where needed
156     - pkg/exf *startdate variables changed from calendar date to
157       model integration time
158    
159    checkpoint51l_pre
160    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
161    o enable to apply restoring on S & T only in a latitude band.
162    o update output (external_forcing_surf modif. change truncation errors)
163       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
164    
165    checkpoint51k_post
166    o change default to: useNHMTerms=.FALSE.
167     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
168       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
169     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
170        exp1, ideal_2D_oce
171     - change data file of oceanic exp (leave the results unchanged for now)
172       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
173    o set gravitySign automatically according to the vertical coordinate used
174      (and change sign: back to "logical" value: +1 when R increases downward)
175    o added an include barrier to the default CPP_OPTIONS.h and
176      removed the #include "PACKAGES_CONFIG.h" from it
177    o fix a bug in mom_fluxform (from chk51j_post)
178    
179    checkpoint51j_post
180    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
181    o adjusted some flow directives (dynamics, thermodynamics)
182    o added cubed-sphere case to test cost function
183    o heckpoint_lev?_directives.h now include
184      pkg-specific directives, whenever those are enabled.
185    o Moving pkg-specific flow directives to corresponding pkg
186      Moving pkg-specific differentiation list to corresponding pkg
187      Moving pkg-specific checkpoint-lev storing to corresponding pkg
188      ---> conventions are
189           - pkg_ad.flow
190           - pkg_ad_diff.list
191           - pkg_ad_check_lev?_dir.h
192    
193    checkpoint51i_post
194    o merge of the branch-genmake2
195      - knowingly breaks the older genmake
196      - automatic generation of all ALLOW_${PKG_NAME} defines
197      - new testreport supersedes older testscript
198    o large number of package inclusion and header cleanups
199    checkpoint51i_pre
200    
201    o new output for adjoin of global ocean vector invariant
202    o fix for checkpoint of thermodynamic seaice and bulk_force
203    o Steph gchem various cleanups
204    
205    checkpoint 51h_pre
206    o fixed some single quotes
207    o modify gchem pkg to be more versatile
208    o modifications to clean up dic pkg
209    o add pkg/cfc
210    
211    checkpoint51g_post
212    o provide links for ARPACK and ADM*TLM
213    o start removing verification/vero/
214    o update AD-related stuff
215      (in particular some IF-statements in model/src/ routines)
216    o adding to verification/global_ocean.90x40x15/ adjoint of
217      vector invariant setup
218    
219    checkpoint51f_post
220    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
221    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
222      of tracer Green's fucntions for ocean inversion project.
223    
224    checkpoint51f_pre
225    o Added on-the-fly spatial interpolation capability
226        "USE_EXF_INTERPOLATION" to pkg/exf.
227      - This is a temporary Cartesian-grid hack until
228        the super-duper ESMF coupler becomes available.
229      - See verification/global_with_exf/README for usage example.
230      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
231        flags and modified pkg/seaice accordingly.
232    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
233        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
234        non-local transport term.
235    
236    checkpoint51e_post
237    o pkg/mom_vecinv:
238      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
239      - add time-ave diagnostic of vorticity advection.
240    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
241    o atmospheric geopotential: - include water vapor effect;
242                                - use p^kappa in p* scaling.
243    o land pkg: read initial state from files.
244    o AIM : add stratospheric drag in the upper level
245    
246    checkpoint51d_post
247    o change function ILNBLNK (=> last non-blank char.) to return zero
248      (instead of the string length) when the string. char is empty
249    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
250    o modif's to restore TAMC compatibility
251      - avoid "_d" constructs in PARAMETER declarations
252      - avoid interrupting lines by comment lines
253    o Use cluster local disks for purely local I/O
254      vs. globally visible disks needed for ctrl stuff
255      (merged from ecco-branch)
256      - new active_file_loc... and mdsio_..._loc routines
257      - affected packages: autodiff, ctrl, grdchk, mdsio
258    
259    checkpoint51c_post
260    o introducing integer flag debugLevel
261      - debLevZero: suppress all output
262      - debLevA: standard
263      - debLevB: equivalent to current debugMode=.TRUE.
264    o introducing pathname variable mdsioLocalDir for mdsio
265      that can be specified at runtime
266      (relevant for cluster I/O to local disk)
267    `
268    >>>checkpoint51b_post
269    adjoint of ptracers
270    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
271    o extended state in checkpoint_lev?, etc.
272    o alternative ctrl/cost with tr1 or ptracer
273    o new comlev1_bibj_ptracers
274    o new ptracers.flow
275    o made ptracers_forcing same as external_forcing_s
276    o added verification for adjoint with ptracers
277      - adm. grdchk fail so far
278      - tlm. grdchk OK
279      - checked tapelev/comlev recomputations: OK
280    <<<checkpoint51b_pre
281    
282    checkpoint51a_post
283    o added code for biogeochemistry package
284      - new pkgs: dic, gchem
285      - new subroutine in ptracers
286    o modify code for biogeo packages
287      - in model/src and pkg/ptracers
288    
289    checkpoint51
290    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
291      - autodiff, ctrl, exf, grdchk, seaice
292      kept separate packages
293      - cost, ecco, obcs
294    o updating verification/internal_wave, verification/lab_sea
295      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
296    
297    checkpoint50i_post
298    o Preparing next differentiable checkpoint and sync
299      of MAIN vs. ecco-branch
300      - 1st step: this one is differentiable
301      - 2nd step: next(! not this) checkpoint will have updated packages
302                  from ecco-branch)
303    
304    checkpoint50h_post
305    o new package "land": provide surface BC for AIM.
306    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
307    o AIM: use true log-P extrapolation for near surface temp (= as in
308        F.Molteni paper) ; update aim.5l_cs output.
309    o New variable in PARM03 for more flexible pickups
310    o somewhat cleaned package initialisation sequence for
311      ctrl/ cost/ ecco/ in packages_... routines
312    
313    checkpoint50g_post
314    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
315      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
316      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
317        made the default because of faster convergence than ADI
318    
319    checkpoint50f_post
320    o exf totally restructured
321      - replaced all exf_set_ routines by one generic exf_set_gen.F
322        and made sure it's still differentiable
323      - split exf_getffields.F into new exf_bulkformulae.F
324      - exf_inscal_/exf_outscal_ suffixes consistent with field names
325      - updated adjoint/makefile and relevant verif. accordingly
326    
327    checkpoint50f_pre
328     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
329          + change Evap over land. (update aim.5l_cs output)
330     o added missing .cvsignores and made uniform across expts
331     o changed configuration of tidal_basin_2d expt
332     o added pkg/debug functions for tracing code in fatal crashes
333     o tidied pkg/monitor to use MONITOR_OPTIONS.h
334     o new fn in pkg/monitor to stop model if solution grows too big
335     o removed lots of single quotes from comments
336    
337    checkpoint50e_post
338    o make KPP work with PTRACERS
339     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
340       nearly a copy of kpp_transport_s
341     - there is no analogue to SurfaceTendencyS, so I have to use
342       gPtr(of the surface layer) instead
343    o add a new platform SunFire+mpi (SunFire 15000) to genmake
344    checkpoint50e_pre
345    
346    checkpoint50d_post
347    o change kpp output from multiple-record state files to single-record state
348      files analogous to write_state.F
349    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
350      analogous to the cg2d-related output.
351    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
352      so that writing to internal file fn (with length 512) fails.
353    checkpoint50d_pre
354    
355    checkpoint50c_post
356    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
357    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
358    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
359    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
360    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
361    
362    checkpoint50c_pre
363    Merging from release1_p13:
364    o bug fix for pkg/seaice dynamic solver
365    o Added SEAICE_initialHEFF to pkg/seaice
366    
367    checkpoint50b_post
368    o store u*,v* in gU,V instead of in guNm1,gvNm1
369    o in order to put the momForcing out of the Adams-Bashforth:
370      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
371      to timestep.F
372    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
373    o re-generate output for highly sensitive test-exp:
374       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
375    
376    checkpoint50b_pre
377    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
378    o corrected CPP option mismatch in exf_Bulk... functions for case
379      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
380    
381    checkpoint50a_post
382    o Bug fix for merging between c50 and KPP.
383      ikey was passed from thermodynamics to kpp_calc via
384      common block rather than being recomputed in kpp_calc,
385      in contradiction with new key itdkey.
386      New key ikppkey created, and tamc.h headers updated.
387    
388    checkpoint50
389    - 2nd step of merge with ecco-branch:
390      merge changes in ecco-branch back into main trunk
391    - bug fix in find_alpha
392    - more storing in gmredi_calc_tensor.F, kpp_routines.F
393    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
394    - merged some sliced AD support routines
395    
396    checkpoint49
397    merged from ecco-branch:
398    o exf:
399      - Enable initialisation of forcing fields to constant
400        (runtime) values.
401      - in exf_getffields.F
402        Reduce i-/j-loop to interior domain, discarding overlaps.
403        That also fixes wrong TAF-key computations for key_1, key_2
404        with bulf formulae.
405      - exf_init.F modify #ifdef for exf_init_evap
406      - exf_getffieldrec.F, ctrl_getrec.F
407        The following INT-usages are not safe:
408          fldsecs  = int(fldsecs/fldperiod)*fldperiod
409          fldcount = int(fldsecs/fldperiod) + 1
410        and were modified.
411    o autodiff: checkpoint_lev...
412      - updated storing for bulk formulae (some arrays were missing)
413      - added state for seaice package
414      - synchronized with main branch
415    o DIVA:
416      Modif.s in
417      - the_main_loop.F
418      - the_model_main.F
419      and added cost_final_restore.F cost_final_store.F
420      o With these changes, it is possible to fully separate
421        the first forward run to compute the cost function (mdthe_main_loop)
422        and adjoint runs over individual DIVA intervals (adthe_main_loop)
423        into separate model executions.
424        This enables better tuning of DIVA to given queue sizes.
425      o Loss of cost function value in consecutive DIVA runs is
426        fixed by storing to 'costfinal' file.
427      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
428        beginning/end of adjoint integration is accounted for.
429      The current changes apply to TAF-1.4.26.
430      TAF has one remaining bug, requiring one manual change
431      (see MITgcm manual).
432    o cal: synchronized between MAIN and ecco-branch
433    
434    checkpoint48i_post
435    o Changes to restore differentiability of code w.r.t. previous tag
436      (mostly adding new routines to make list and replacing
437      pressure by totPhiHyd).
438    o Updated and merged grdchk package
439      - has both ADM and TLM checks
440      - works for single- and multi-proc.
441      - output cleaned
442      - worked successfully for parallel DIVA
443    o genmake:
444      - Adding -platform=SP4
445      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
446    o Modif. for DIVA:
447      ctrl_unpack should not be called in intermediate DIVA interval.
448      (similar thing would apply for active files such as
449      tbar, sbar, psbar, which should not be reinitialised;
450      only relevant for ecco-branch)
451    
452    checkpoint48h_post
453    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
454    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
455    o Added SEAICE_initialHEFF to pkg/seaice
456    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
457    
458    checkpoint48g_post
459    --- EOS:
460    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
461      store total Potential in totPhyHyd for diagnostics & EOS.
462    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
463    --- Pressure/geopotential gradient:
464    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
465    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
466      ( changes results of global_ocean_pressure )
467    o NLFS + z-coord.: add eta*Rho' contribution.
468    o accurate phiHyd when using interface-W at the middle between 2 centers
469     ( changes results of ideal_2D_oce )
470    o includes r* 2nd term in potential gradient.
471    
472    checkpoint48f_post
473    Merging from release1_p12:
474    o Modifications for using pkg/exf with pkg/seaice
475      - improved description of the various forcing configurations
476      - added basic radiation bulk formulae to pkg/exf
477      - units/sign fix for evap computation in exf_getffields.F
478      - updated verification/global_with_exf/results/output.txt
479    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
480      (SBO) core products, including oceanic mass, center-of-mass,
481      angular, and bottom pressure (see pkg/sbo/README.sbo).
482    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
483      to avoid negative values in shallow regions.
484      - updated verification/natl_box/results/output.txt
485      - updated verification/lab_sea/results/output.txt
486    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
487    o Added useSingleCpuIO option (see PARAMS.h).
488    o Updated useSingleCpuIO option in mdsio_writefield.F to
489      work with multi-field files, e.g., for single-file pickup.
490    o pkg/seaice:
491      - bug fix in growth.F: QNET for no shortwave case
492      - added HeffFile for specifying initial sea-ice thickness
493      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
494    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
495      kpp_transport_t.F, forward_step.F, and the_main_loop.F
496    o pkg/seaice:
497      - adjoint-friendly modifications
498      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
499    
500    checkpoint48e_post
501    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
502    o dynamics: change definition of computational domain & adapt mom_fluxform
503      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
504    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
505        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
506        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
507        global_ocean.90x40x15 global_with_exf global_ocean_pressure
508        inverted_barometer solid-body.cs-32x32x1
509      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
510    
511    checkpoint48d_post
512    o in preparation for r*:
513     a) use pre-computed gradient of hydrostatic potential:
514        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
515     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
516        => affects results of glob_oce_pressure (different truncation error)  
517      update output.txt of ideal_2D_oce & global_ocean_pressure
518    
519    checkpoint48d_pre
520    o in preparation for r*:
521      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
522      pass the 2 comp. of the grad. as arguments to momentum S/R.
523      but for the moment, only used if it does not change the results.
524    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
525    
526    checkpoint48c_post
527    Modifications in treatment of initial flux forcing controls
528    to avoid extra storing of flux fields.
529    
530    checkpoint48c_pre
531    o Added tidal_basin_2d experiment (currently 1D!)
532    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
533    
534    checkpoint48b_post
535    o r* coordinate added in #ifdef NONLIN_FRSURF block.
536     (modification to pressure gradient not yet implemented)
537    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
538      (for U & V) that are used for vertical advection of momentum.
539    
540    checkpoint48a_post
541    o In preparation for r*, use temp. array to compute vertical transport
542       in flux-form momentum pkg. => change results of few test-exp.
543      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
544                        lab_sea, natl_box & plume_on_slope
545    
546    checkpoint48
547    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
548    
549    checkpoint47j_post
550    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
551    o moved adexch from forward_step to addummy_in_stepping
552    o added exch in ctrl_map_...
553    o aveFreq.=0. at end of cost_final to avoid overwrite in
554      reverse checkpointing loop
555    o Yet more changes in gmredi:
556      * adgmredi_calc_tensor
557        avoiding all recomputation of gmredi_slope_limit
558      * adgmredi_x/y/rtransport
559        added flag for excessive storing to avoid recomp. of
560        u/v/rtans, dTdx/y/z
561        -> this is not really necessary and very memory-consuming
562      * adgmredi_slope_psi:
563        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
564      * gmredi_slope_limit
565        re-activated full calculation of taperfct for case 'ac02'
566    o updating verification/ adjoints of carbon, global_ocean.90x40x15
567    
568    checkpoint47i_post
569    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
570    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
571      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
572    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
573    o gmredi: fix few bugs.
574    
575    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
576    This will be a good checkpoint to plug into the ecco-branch.
577    o few modif.'s to get latest version adjointed
578      (mainly kick out code in ini_linear_phisurf)
579    o modif's to run adjoint with exactConserv
580    o case GM_BOLUS_ADVEC should be cleaned
581      S/R gmredi_slope_psi should be cleaned
582    o verification/carbon now has exactConserv=.TRUE.
583    
584    checkpoint47g_post
585    o time-average AIM output: becomes independent from statvars time-average
586      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
587    o After TAF bug fix:
588      Tested adjoint of gmredi package.
589      Tests were done with checkpoint47 rather than with latest
590      checkpoint47f_post since the latter is broken for the adjoint
591      verification/carbon/ contains both ADM and TLM gradient checks.
592    Here they are, before they get changed/lost/stolen.
593    Mostly modif.'s to fix numerical sensitivities.
594    Gradient checks OK for
595    - GM_taper_scheme:
596      * clipping
597      * ac02
598      * linear
599      * glw91
600      * dm95
601      * ldd97
602    - GMREDI_OPTIONS:
603      * GM_VISBECK_VARIABLE_K
604      * GM_NON_UNITY_DIAGONAL
605      * GM_EXTRA_DIAGONAL
606      * GM_BOLUS_ADVEC
607    in conjunction with data.gmredi parameters to be checked in
608    in a few minutes under verification/carbon/code/
609    
610    checkpoint47f_post
611    Merging from release1_p10:
612    o modifications for using pkg/exf with pkg/seaice
613      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
614        and SEAICE_EXTERNAL_FLUXES
615      - pkg/exf CPP options EXF_READ_EVAP and
616        EXF_NO_BULK_COMPUTATIONS
617      - usage examples are Experiments 8 and 9 in
618        verification/lab_sea/README
619      - verification/lab_sea default experiment now uses
620        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
621    
622    checkpoint47e_post
623    o created a tag prior to creating a branch
624    
625    checkpoint47d_post
626    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
627      at the bottom boundary had an erroneous half slip boundary condition
628    o added bottom drag and no slip boundary condition capabilities to
629      oceanic pressure coordinates code
630    o added new verification experiment global_ocean_pressure, this experiment is
631      also described in the tutorial section of the manual
632    checkpoint47d_pre
633    
634    checkpoint47c_post
635    o Added a verification experiment for a global cubed-sphere ocean run
636      -  verification/global_ocean.cubed32x32x30
637      -  uses pkg/therm_seaice and pkg/bulk_forcing
638    
639    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
640    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
641      when using P-coordinate; only implemented for atmospheric config.
642    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
643      NOTES: requires option NONLIN_FRSURF to be "#define".
644    o update advect_xz/results/output.txt (left from checkpoint44g_post)
645    
646    checkpoint47b_post
647    Merging from release1_p9:
648    o pkg/seaice
649      - removed GOTO's and added taf directives
650      - double precision constants to reduce the g77 (Linux)
651        to F77 (SGI) differences reported in release1_p8
652    o tools/genmake
653      - added SGI options
654    o verification/testscript
655      - updated to that of checkpoint47a_post
656    o verification/global_ocean.90x40x15/input/eedata
657      - modified for SGI f77 compatibility
658    o verification/lab_sea
659      - added description of sea-ice model
660      - added missing matlab routines
661      - added test of thermodynamics parallelization
662    
663    checkpoint47a_post
664    o new pkg: aim_v23
665     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
666       for now, keep the same surface forcing as before.
667     - Part-Cell implemented into AIM; check that Heat & Water are conserved
668     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
669     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
670    o add diagnostic of surface correction term in monitor output
671    
672    o bulk_force and therm_seaice
673    - Two packages:  bulk_force (Bulk forcing)
674      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
675    - Earlier integration from Stephaine Dutkiewicz
676      and Patrick Heimbach.
677    - Two ifdef statements for compile time,
678       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
679    
680    checkpoint47
681    differentiable version of checkpoint46n_post
682    o bug fix in quasihydrostaticterms
683    o * "clean" adjoint code (in terms of extensive recomputations)
684        can now be obtained for all GMREDI options (i.e. for
685        - GM_VISBECK_VARIABLE_K
686        - GM_NON_UNITY_DIAGONAL
687        - GM_EXTRA_DIAGONAL
688        - GM_BOLUS_ADVEC )
689      * However, wrong gradient check problem remains unsolved.
690      * New CPP options have been introduced for different
691        tapering schemes
692    o external_fields_load now part of differentiation list
693    o pressure needs multiple storing;
694      would be nice to have store_pressure at beginning or
695      end of forward_step, e.g. by having phiHyd global (5-dim.)
696      (NB: pressure is needed for certain cases in find_rho,
697      which is also invoked through convective_adjustment).
698    o recomputations in find_rho for cases
699     'JMD95'/'UNESCO' or 'MDJWF' are OK.
700    o #define ATMOSPHERIC_LOADING should be differentiable
701    o ini_forcing shifted to begining of initialise_varia
702    o Incorporating QNVS line search routines into MITgcm
703      (this is separate code, and therefore not under pkg)
704      lsopt/, optim/
705    o Updated verification/carbon/
706      - #define GM_VISBECK_VARIABLE_K
707      - GM_taper_scheme    = 'ldd97'    
708    
709    checkpoint46n_post
710    Merging from release1_p8:
711    o verification/natl_box:
712      updating new external_fields_load routine
713    o New package: pkg/seaice
714      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
715      The sea-ice code is based on Hibler (1979-1980).
716      Two sea-ice dynamic solvers, ADI and LSR, are included.
717      In addition to computing prognostic sea-ice variables and diagnosing
718      the forcing/external data fields that drive the ocean model,
719      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
720      The implied surface heat flux is then stored in variable
721      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
722      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
723      non-local transport term.  Because this call precedes model
724      thermodynamics, temperature under sea-ice may not be "exactly" at
725      the freezing point by the time theta is dumped or time-averaged.
726      N.B.: fairly large differences in accuracy occur across
727            different platforms/compilers; comparison between
728            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
729            generated output gives:
730       T           S           U           V
731      C D M    c        m  s        m  s        m  s        m  s
732      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
733      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
734      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
735    
736      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
737    o GAD:
738      - generated new common blocks to account for call of
739        same gad routines with differing traceridentities
740        (needed to modify tracerIdentity indices in GAD.h)
741      - generated separate common blocks for case useCubedSphereExchange
742        (Department of Futurology)
743      - parameter lists to gmredi_?transport: added tracerIdentity
744      - added new key indices to tamc.h
745    o external_fields_load:
746      - added this routine to TAF list
747      - needed to make some common blocks global and additional storing
748        along the same lines as exf package (checkpoint_lev?_directives.h)
749    o exf:
750      updated external forcing package
751      - bug fixes carried over from ecco-branch
752        (missing OBCS_OPTIONS.h in two routines)
753      - enable easy to use "no forcing".
754      - added exf I/O for atmospheric loading
755      - added exf I/O for runoff data
756      - transfered scaling between exf <-> MITgcm to exf namelist
757    o Adding new verification experiment global_with_exf.
758      This verification experiment is almost identical to the
759      global_ocean.90x40x15 experiment, except that it uses
760      the exf (and cal) package instead of the
761      external_fields_load routine (cf README file).
762    
763    checkpoint46m_post
764    o modified testscript to return -- when there are no lines of "%MON" output
765    o added new flag "quasiHydrostatic" for QH mode
766      and new routine quasihydrostaticterms()
767    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
768      New routine: mom_u_coriolis_nh()
769    o fixed sign of non-hydrostatic metric terms in u and v equations.
770      Depend on correct sign of gravitySign.
771    o added work.pc* to .cvsignore in aim directories using ifc
772    o introduced flag for controllin non-hydrostatic metric terms
773    o removed gravitySign from PARM04
774    o switched to g77/ifc from pgf77 in aim experiments
775    
776    checkpoint46l_post
777    o made convective adjustment work with pressure coordinates:
778     - changed the direction of k-loop in convective_adjustment.F for the
779       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
780     - adjusted the reference pressure k-index in convective_adjustment.F
781     - adjusted the convection condition in convect.F (in analogy to
782       calc_ivdc.F)
783     - convective_adjustment no longer computes anything on the halos
784     - removed the warnings about negative salinity from find_rho.F and
785       find_alpha.F; instead the new routine look_for_neg_salinity, called
786       at the beginning of find_rho, find_alpha, and find_beta, does a
787       check of the entire slice, if CPP-option
788       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
789    checkpoint46l_pre
790    
791    checkpoint46k_post
792    o fixed the verification/global_ocean.90x40x15 experiment:
793     - new bathymetry (the world according to A., JMC, and M.)
794     - new initial fields and forcing fields (*.bin files)
795     - new POLY3.COEFFS (for the next release one should switch to a full
796       equation of state: JMD95P or MDJWF)
797     - fixed several errors and redundancies in the data file
798     - experiment uses looped cells
799     - added matlab directory with diagnostic scripts for plotting of output
800    
801    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
802     - read AIM physics parameters from a file (data.aimphys)
803     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
804    
805    checkpoint46j_post
806    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
807    o move wVel computation at the end of the time step, in S/R integr_continuity
808    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
809    o update timeave pkg for wVel diagnostic.
810    checkpoint46j_pre
811    
812    checkpoint46i_post
813    o Clean up AIM package (and keep the results unchanged):
814      include CPP_OPTION and use IMPLICT NONE in all routines ;
815      declare all the variables _RL ; use _d 0 for all numerical constants.
816      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
817    
818    checkpoint46h_post
819    o cleaned up the use of rhoNil and rhoConst.
820      - rhoNil should only appear in the LINEAR equation of state, everywhere
821        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
822        and the dynamical equations are all divided by rhoConst
823    o introduced new parameter rhoConstFresh, a reference density of fresh
824      water, to remove the fresh water flux's dependence on rhoNil. The default
825      value is 999.8 kg/m^3
826    o cleanup up external_forcing.F and external_forcing_surf.F
827      - can now be used by both OCEANIC and OCEANICP
828    checkpoint46h_pre
829    
830     Added code to convert surface volume flux (fresh water) into
831     a mass flux when using P coordinates in the ocean (OCEANICP).
832     Note: It assumes you have set rho0=rhoConst=density of fresh water.
833    
834    checkpoint46g_post
835    o Include a new diagnostic variable phiHydLow for the ocean model
836      - in z-coordinates, it is the bottom pressure anomaly
837      - in p-coordinates, it is the sea surface elevation
838      - in both cases, these variable have global drift, reflecting the mass
839        drift in z-coordinates and the volume drift in p-coordinates
840      - included time averaging for phiHydLow, be aware of the drift!
841    o depth-dependent computation of Bo_surf for pressure coordinates
842      in the ocean (buoyancyRelation='OCEANICP')
843      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
844        Theta, Salinity, and Pressure in the parameter list. This routine is
845        presently contained in find_rho.F. This routine does not give the
846        correct density for 'POLY3', which would be a z-dependent reference
847        density.
848    o cleaned up find_rho
849      - removed obsolete 'eqn' from the parameter list.
850    o added two new verification experiments: gop and goz
851      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
852    checkpoint46g_pre
853    
854    checkpoint46f_post
855    o Enable tangent linear (forward mode) gradient checks:
856      - extended active file handling to g_... files
857      - added TANGENT_SIMULATION to theSimulationMode
858      - extended grdchk package accordingly
859    o added tangent linear setup in verification/carbon/code_ftl
860    o added adjoint setup in verification/front_relax/code_ad
861    
862    checkpoint46e_post
863    o Added new equation of state -> MDJWF
864      - EOS of McDougall et al., 2002, JAOT, submitted
865      - caveat: the equation of state is only valid for a smaller (more
866        realistic?) range of values than JMD95P/Z and UNESCO
867      - added masks to the calculation of pressure in store_pressure
868      - added more check values for density in check_eos (ini_eos.F), some of
869        the old check values are out of the range of the MDJWF-eos, so don't
870        expect perfect matches for those
871    checkpoint46e_pre
872    
873    checkpoint46d_post
874    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
875      'OCEANICP', also initialised field pressure correctly in ini_eos in the
876      case of pressure coordinates. eosType='JMD95Z' in
877      combination with buoyancyRelation='OCEANICP' now causes an error.
878    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
879      in find_alpha/beta.
880    checkpoint46d_pre
881    
882    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
883      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
884    
885    checkpoint46c_post
886    o Changes necessary for ocean in p-coordinates
887     -  Added new buoyancy relation = 'OCEANICP'
888     -  Added new parameters = gravitySign (this used to be contained inside
889        the factor dRdZ which I added when we first switched to R coordinates).
890     X GM/Redi is not compatible (yet)
891     X bottom drag and no-slip need to be debugged.
892    checkpoint46c_pre
893    
894    checkpoint46b_post
895    o Added new equation of state -> JMD95Z and JMD95P
896      - EOS of Jackett and McDougall, 1995, JAOT
897      - moved all EOS parameters into EOS.h
898      - new routines ini_eos.F, store_pressure.F
899    o Added UNESCO EOS, but not recommended because it requires
900      in-situ temperature (see JMD95)
901    o Modified formatting for knudsen2.f in utils/knudsen2 and added
902      unesco.f to be used with POLY3
903    checkpoint46b_pre
904    
905    checkpoint46a_post
906    o Added (atmospheric) pressure loading
907      - new field in FFIELDS.h, etc...
908      - new cpp flag ATMOSPHERIC_LOADING
909    o Changed hFacC to _hFacC in calc_phi_hyd.F
910    o Added SHORTWAVE_HEATING to some files for consistency
911    checkpoint46a_pre
912    
913    checkpoint46
914    further merges from release1_p5
915    o new ctrl package
916      - adopted from ECCO environment to enable optimization
917      - added Eliassen Palm fluxes to controls
918    o added Eliassen Palm flux controls to gradient check package
919    o cost package
920      - Compatible with new ctrl package
921      - added Eliassen Palm cost hooks
922      - modif's of existing cost functions
923    o Adjoint-related bug fixes in kpp:
924      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
925      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
926    o autodiff package
927      - flow directives:
928        + new for S/R do_the_model_io
929        + enhanced for S/R checkpoint
930        + new gmredi.flow
931      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
932        disable adcommon.h/g_common.h by default.
933      - fixed problem for adjoint of global_max
934    o modified verification/carbon/
935    o New setup for adjoint of global_ocean
936    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
937    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
938    o incorporated hooks for sponge layer code (external_forcing.F)
939    
940    checkpoint45d_post
941    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
942    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
943      (affects plume_on_slope "cg2d" output)
944    o add new parameter deltaTfreesurf for free-surface time stepping
945    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
946    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
947    o change phiMin in exp1 (to agree with documentation)
948    o add new flags:
949     - T,S forcing inside/outside Adams-Bashforth
950     - turn off temp,salt advection and/or forcing
951     - for each tracer, define internal flag for multiDimAdvection & A-B
952    o monitor: change definition of KE to check conservation of Energy
953    
954    checkpoint45c_post
955    o Removed f90 comments ("!")
956    o Modified initialisations to enable exf package for MITgcm
957      (without invoking ECCO_PACKAGE).
958    o modifications to gradient check package (Martin Losch)
959      - enable centered differences
960      - modified format of standard output
961    
962    checkpoint45b_post
963    o cleaned exchange calls in cg2d
964    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
965    o included CPP option SINGLE_LAYER_MODE in thermodynamics
966      to configure barotropic setup (Martin Losch)
967    o moved some initialisations within bi,bj loop in dynamics
968      (TAF flow dependency)
969    o in initialise_varia, moved call packages_init_variables
970      before convective_adjustment_init
971      (corresponding adjustment of TAF tape initialisation).
972    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
973    
974    checkpoint45a_post
975    o compute Rho over the whole domain (extend iMin,jMin indices)
976    o specific exchange for X-slice domain (case Ny=1)
977    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
978    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
979    
980    checkpoint44h_post = checkpoint45
981    o Fix to restore differentiability:
982      place at which packages_init_variables is called in
983      initialise_varia is crucial for reverse control flow.
984    o modifications in GMRedi to enable stable adjoint
985      (corresponding modif's in thermodynamics, dynamics)
986    o added missing hook for sponge layer code in external_forcing
987    o modified test cost functions
988    o storing in gad_advection (plus removal of write(0,*)!
989    o missing headers TR1.h added in convective_adjustment routines
990    o errorMessageUnit set non-equal zero in eeboot
991      (conflict on some platforms, e.g. IBM SP3)
992    o modified carbon verif.
993    
994    checkpoint44h_pre
995    o vertical grid option: allow to put the Interface at the middle between
996      2 cell-centers ; replace delZ in pkg/kpp by drF.
997    o GM Advective form: Tracers are advected using the residual transport (=
998      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
999    
1000    checkpoint44g_post
1001    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1002      results) ; ifdef missing in thermodynamics.F
1003    
1004    checkpoint44f_pre,checkpoint44f_post
1005    o added PTRACERS package
1006      This allows an arbitrary number of passive tracers to be integrated
1007      forward simultaneously with the dynamicaly model.
1008      + Implemented so far:
1009        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1010        - I/O and checkpointing
1011        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1012      + Not implemented so far:
1013        - KPP
1014        - OBCS
1015      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1016        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1017        line in data.pkg.
1018      + This package is disabled by default since it increases storage.
1019    
1020    
1021    o testscript: added -cleanup option
1022    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1023                 b) enable to filter 2D fields.
1024    
1025    checkpoint44e_pre,post
1026    o re-wrote convective adjustment to use pre-calculated weights
1027      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1028      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1029      Original calls to convect() still in place.
1030    
1031    chkpt44d_pre,post
1032    o added missing EXCLUDE_MONITOR flags
1033    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1034      (incompatible typ in MIN/MAX expressions caused problems
1035      on IBM SP3)
1036    o in genmake added variable MAKEDEPEND
1037      plus resetting for case SunOS
1038    o added timer_stats.c routine for IBM SP3
1039    o removed variables in dynamics
1040    !!! I forgot to create tag chkpt44d_pre !!!
1041    !!! But chkpt44d_pre = chkpt44c_post    !!!
1042    
1043    o real fresh water flux implemented with non-linear free-surface.
1044    
1045    chkpt44c_pre,post
1046    o few fix (mask in shap_s2, EmPmR in external_field_load,
1047      USE_NATURAL_BCS in solve_for_P);
1048    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1049    
1050    checkpoint44b_pre/_post
1051    o merge of relevant stuff from the ecco-branch:
1052      - genmake: removed $S64 overwrite for case SunOS
1053      - pkg/exf: update and corrections for field swapping and obcs
1054      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1055                  harmonized between ECCO and MITgcm
1056      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1057                      updated checkpointing_lev... lists for obcs
1058      - model/src: minor changes in forward_step, plot_field
1059                   added directive for divided adjoint in the_main_loop
1060      - pkg/mdsio: added mdsio_gl_slice
1061    
1062    o check parameters & config (chkpt44a_pre,post)
1063    o OBC and NonLin_FrSurf.
1064    
1065    checkpoint44
1066    o fix bug in mom_vi_del2uv
1067    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1068    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1069    o update AIM experiments (NCEP input files)
1070    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1071    o added some stuff for AD
1072    
1073    checkpoint43
1074    o added two new advection tests
1075    o added global 4x4 degree ocean test
1076    o added test of H&S94 with free surface on cube
1077    o some final mods for gradient check, adjoint,...
1078    
1079    checkpoint42
1080      Fixed AD-related problems:
1081    o Store directives up-to-date with re-arranged Adams-Bashforth
1082      (mainly thermodynamics.F)
1083    o New store directives for multi-dim. advection schemes
1084      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1085      * new common block and key passkey
1086      (mainly gad_advection.F)
1087    o Modified store directives for split of dynamics/thermodynamics
1088      for the case ALLOW_KPP
1089    o Cleaned argument list for timestep_tracer.F
1090    
1091    checkpoint41
1092    o re-formatted/added comments in prologues of key subroutines
1093      to work with protex
1094    
1095    checkpoint40
1096    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1097    o added FLT (floats) package from Arne along with demo. experiment
1098    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1099      implementation of forward-in-time forcing terms
1100    o more mods for non-linear free-surface including new variable
1101    o modified multi-dim method to work on cube
1102    o bug fix in KPP (from DM)
1103    
1104    checkpoint40pre9
1105    o added DST advection schemes
1106    o fix MPI bug on SGI's
1107    o modifications for non-linear free-surface
1108    o fixed conditionals for fixed flow/passive tracer only mode
1109    o added tension/strain form of stress tensor
1110    o changes to commenting of arguments for TAF/TAMC
1111    o added/updated many matlab scripts
1112    o added multi-dimensional advection method for tracers
1113      
1114    checkpoint40pre8
1115    o new package rw/
1116      Added method for dumping intermediate local arrays:
1117      mdsio_writetile - same as mdsio_writefield except works from inside
1118                        bi,bj loop
1119      mdsio_writelocal - same as mdsio_writetile except works for local
1120                         arrays
1121      write_local_r? - higher-level wrapper for mdsio_writelocal
1122      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1123      Example given at end of mom_vecinv.F that dumps some local arrays.
1124    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1125      control flux-form versus vector invariant code.
1126      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1127      or genmake -DISABLE ...
1128    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1129      (additional storing is now needed for case vecinv;
1130      currently nothing implemented to switch this storing off
1131      in case fluxform is used since no CPP flag available).
1132    
1133    checkpoint40pre7
1134    o bug fix in dynamics.F
1135      calc_viscosity called before k=1,Nr loop.
1136    o added some #ifdef's ALLOW_PASSIVE_TRACER
1137    o cleaned initialisations in ctrl_map_ini
1138      related to TAF
1139    
1140    checkpoint40pre6
1141    o split dynamics into thermodynamics & dynamics
1142    o corresponding split of calc_diffusivity into
1143      calc_diffusivity, calc_viscosity
1144      (kpp_calc_diff, kpp_calc_visc).
1145    o Added diffkr, kapgm to control variables
1146    o bug fix in gmredi_slope_limit for ldd97
1147    
1148    checkpoint40pre5
1149    o proper initialization of Adams-Bashforth time stepping
1150      + uses forward step for very first step of model (iter=0)
1151    o re-generated *all* output since almost all output is modified by this
1152      change (sorry but we've been putting this one off for about 2 years)
1153      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1154        *not* regenerated since they are already out of date and I don't
1155        want to create the impression that they are suddenly working.
1156    o removed KAP stuff for DEC's
1157    o modified/added many .cvsignore files in */code and */input
1158    o added new expt "solid-body.cs-32x32x1"
1159      + this uses an alternative form of ini_curvilinear_grid.F which
1160        is not necessarily any better than the current one...
1161    
1162    checkpoint40pre4
1163    o added re-initialisations of utrans,vtrans,rtrans in
1164      calc_common_factors which are crucial for TAF.
1165    o extended iMin,jMin range for calc_common_factors,
1166      calc_diffusivity
1167    o added option ALLOW_PASSIVE_TRACER
1168    o a few minor updates and fixes
1169    
1170    checkpoint40pre3
1171    o created calc_gtr1.F for gad package
1172    o split the_main_loop and re-introduced forward_step
1173    o some recomputations of nIter0 for TAMC
1174    
1175    checkpoint40pre2
1176    o Updated to latest branch of AJA, JMC
1177    o Added gradient check package
1178    o Added routines for passive tracer handling
1179    o Added carbon sequestration sensitivity experiment
1180    
1181    checkpoint39
1182     o Modifications and fixes to support TAMC
1183       (mainly missing or wrong directives)
1184     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1185       in addummy_in_stepping
1186     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1187     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1188     o Included following packages:
1189       cal: calendar
1190       exf: external forcing
1191       ecco: essential routines to control use of cal, exf
1192             (NB: this is not the full ECCO environment)
1193     o disabled some packages by default in genmake
1194    
1195    checkpoint38
1196     o see notes_c37_adj.txt
1197     o corrected wrong layer index in external_forcing_t
1198     o replaced the_main_loop/forward_step by the_main_loop
1199     o removed forceoutput from write_state
1200       (replaced criteria for initial/final state)
1201     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1202    
1203    checkpoint37
1204     o mdsio.F routine split and packaged in pkg/mdsio
1205       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1206        used unless genmake -disable=mdsio)
1207     o allow a more precise surface-geopotential gradient for the atmosphere
1208       taking into account the change in space of Alpha (=1/rho) at the surface.
1209     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1210       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1211     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1212       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1213       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1214     o Time-Average diagnostics defined as a pseudo package "timeave".
1215     o pickup files : old pickup (before c35) did not work with new code (c35
1216       and after) unless activating 2 commented lines in initialise-varia.
1217     o Non-Hydrostatic pickup file Pb fixed.
1218     o bug with Rigid-lid version (since c35) fixed.  
1219    
1220    checkpoint36
1221     o implement Crank-Nickelson barotropic time-stepping
1222     o recover Time-Average diagnostics
1223     o fix Pb in checkpoint (PR#19)
1224     o AIM become a standard package ; clean unused CPP_kees
1225    
1226    checkpoint35
1227     o subtantial rewrite of dynamics.f
1228     o allows staggered time-stepping
1229     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1230     o added bottom drag (linear + quadratic)
1231    
1232    checkpoint34
1233     o Modified exchange routines for correct reverse simulation.
1234     o Added verification output to comply with bug fix in impldiff.F
1235       as of c33 (exp2, natl_box).
1236     o Corrected store directives in dynamics.F
1237     o Corrected array boundaries in impldiff.F
1238     o Corrected array dimensions in gmredi.
1239       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1240     o Added routine GLOBAL_SUM_INT to global_sum.F
1241     o Added mdsio_gl.F for ECCO purposes.
1242    
1243    checkpoint33
1244     o Fixed bug in lower BC in impldiff.F
1245     o Fixed confusion about units of forcing arrays in FFIELDS.h
1246       namely Fu,Fv,Qnet,Qsw,EmPmR:
1247       - Removed verification/natl_box/code/external_fields_scale.F
1248         (did not differ from that in model/src)
1249       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1250         (see FFIELDS.h for description)
1251       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1252         kpp_calc.F and kpp_transport_t.F
1253       - Removed model/src/external_fields_scale.F and calls to it
1254       - verification/natl_box uses flux data with "atmospheric" sign so
1255         a special version of external_fields_load.F is used to
1256         change the data as it's read in. This way, the arrays
1257         have the right units and signs at all times tha a user could
1258         possibly use them.
1259     o Corrected genmake to delete a temporary file during configuration
1260    
1261    checkpoint32
1262     o Scaling of forcing fields moved from external_forcing.F to
1263       external_fields_scale.F, called directly after loading fields.
1264     o Surface relaxation terms added to surface tendency fields in
1265       extra subroutine.
1266     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1267       fields.
1268     o Changes in GMRedi to comply with packaging structure.
1269     o Modifications and bug fixes in KPP package.
1270     o Verification experiment for KPP added (verification/nat_box/)
1271    
1272    checkpoint31
1273     o Packages interface brought in line with defined standard
1274       -> new routines packages_...F
1275       -> changes in initialise_fixed.F, initialise_varia.F
1276       -> enables initialisation interface for ECCO package
1277     o Rescaling of external forcing fields immediately after read
1278       (removed from external_forcing.F)
1279       -> new: surface_fields_scale.F
1280       -> affects ini_foorcing.F, external_fields_load.F
1281     o Computation of surface tendencies before tendency updates.
1282       -> new: external_forcing_surf.F
1283     o Change of variable names useGMRedi, useKPP, useECCO
1284     o Further changes in dynamics.F, impldiff.F for TAMC
1285     o Tested for experiments 0, 2, 4.
1286       - not yet tested for GMRedi.
1287       - not yet tested for KPP.
1288    
1289    checkpoint30
1290     o Updates for OBCs
1291     o New experiment for test OBCs (internal_wave)
1292     o New output.txt in verification/exp4/results/
1293     o Updates for KPP: calculation of viscosity corrected, new variables
1294       kpp_dumpFreq and kpp_taveFreq
1295     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1296       and entry for T90 in genmake
1297    
1298    checkpoint29
1299     o packaged KPP and GM/Redi
1300    
1301    checkpoint28
1302     o Corrected initialization of hFacMin for difference vertical coordinates
1303     o Modified calculation of partial cell thickness to more robust algorithm
1304     o config_summary.F: replaced write_1D_... by write_0D_...
1305       read_write.F: added subroutines write_0D_...
1306     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1307       included some initialisations required for TAMC.
1308     o routine calc_isoslopes: modified sqrt computation to make it
1309       differentiable for zero argument.
1310     o routines dynamics, impldiff:
1311       included store directives and tape key computations required for TAMC.
1312     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1313    
1314  checkpoint27  checkpoint27
1315   o fixed calc_isoslopes() to so that cancellation of terms in tensor   o fixed calc_isoslopes() to so that cancellation of terms in tensor
1316     formulation works properly with variable resolution.     formulation works properly with variable resolution.

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