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revision 1.29 by adcroft, Thu Jul 13 14:22:58 2000 UTC revision 1.199 by edhill, Thu Oct 30 12:00:41 2003 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    o create initial cd_code package
7      - WARNING: the initialization of fields within packages
8        is broken because INI_FIELDS (where READ_CHECKPOINT is
9        called) is called *before* PACKAGES_INIT_VARIABLES.
10        This seems to be backwards since
11        1) its important to initially zero the entire field including
12           the "halo" region
13        2) zeroing needs to be done *before* reading pickup info
14           and the pickup call might or might not happen in any
15           particular run
16      - this needs an overhaul for R2
17    o cleanup verification/*/code/GMREDI_OPTIONS.h
18    o cleanup testreport
19    
20    checkpoint51o_post
21    o bringing AD-related verif's up to date with genmake2
22      - carbon/
23      - global_ocean.90x40x15/
24      - hs.94.1x64x5/
25      - (front_relax/ )
26    o (more) consistent directory structure for AD-related verif.'s
27    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
28    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
29    o bug fix in find_alpha.F for MDJWF:
30      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
31        change rho -> rho-rhoConst
32      - replace call find_rho to find_rhonum
33    o initialisation of rFlx extended to full array (required by TAF)
34      and shifted to thermodynamics
35    o removed PTRACERS.h in ptracers routine
36    o added surfacetendencyPtr to S/R parameter list pracers_forcing
37    o Correcting initialisations for fVerU, fVerV.
38    o helping TAF to recognize dependency on kUp for
39      fVerU, fVerV
40    o Replacing delZ by delR in pkg/ctrl/
41    checkpoint51o_pre
42    
43    o undid all of cp51 pending some cleanups and discussion
44    o added the [#include "AD_CONFIG.h"] statement to all files that need
45       it for adjoint/tl #defines
46     o re-worked the build logic in genmake2 to support AD_CONFIG.h
47     o removed tools/genmake since it no longer works
48    
49    checkpoint51n_post
50    o modifications to make FREEZE flux visible to pkg/kpp
51      - moved surfaceTendencyTice from pkg/seaice to main code
52      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
53      - subroutine FREEZE now limits only surface temperature
54        (this means new output.txt for global_ocean.90x40x15,
55         global_ocean.cs32x15, and global_with_exf)
56    o added surface flux output variables to TIMEAVE_STATVARS
57    
58    checkpoint51n_pre
59    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
60    o added [#include "AD_CONFIG.h"] to all files that use the following
61      defines:
62      - ALLOW_ADJOINT_RUN
63      - ALLOW_TANGENTLINEAR_RUN
64      - ALLOW_ECCO_OPTIMIZATION
65    
66    checkpoint51m_post
67    o incorporating changes to get TAMC/TAF working in genmake2
68      - added new TAMC/TAF targets to the Makefile
69      - various cleanups related to package handling
70      - these changes should have no impact on the forward model
71    
72    checkpoint51l_post
73    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
74     - faster algorithm for cal_addtime.F
75     - higher precision arithmetic, where needed
76     - pkg/exf *startdate variables changed from calendar date to
77       model integration time
78    
79    checkpoint51l_pre
80    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
81    o enable to apply restoring on S & T only in a latitude band.
82    o update output (external_forcing_surf modif. change truncation errors)
83       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
84    
85    checkpoint51k_post
86    o change default to: useNHMTerms=.FALSE.
87     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
88       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
89     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
90        exp1, ideal_2D_oce
91     - change data file of oceanic exp (leave the results unchanged for now)
92       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
93    o set gravitySign automatically according to the vertical coordinate used
94      (and change sign: back to "logical" value: +1 when R increases downward)
95    o added an include barrier to the default CPP_OPTIONS.h and
96      removed the #include "PACKAGES_CONFIG.h" from it
97    o fix a bug in mom_fluxform (from chk51j_post)
98    
99    checkpoint51j_post
100    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
101    o adjusted some flow directives (dynamics, thermodynamics)
102    o added cubed-sphere case to test cost function
103    o heckpoint_lev?_directives.h now include
104      pkg-specific directives, whenever those are enabled.
105    o Moving pkg-specific flow directives to corresponding pkg
106      Moving pkg-specific differentiation list to corresponding pkg
107      Moving pkg-specific checkpoint-lev storing to corresponding pkg
108      ---> conventions are
109           - pkg_ad.flow
110           - pkg_ad_diff.list
111           - pkg_ad_check_lev?_dir.h
112    
113    checkpoint51i_post
114    o merge of the branch-genmake2
115      - knowingly breaks the older genmake
116      - automatic generation of all ALLOW_${PKG_NAME} defines
117      - new testreport supersedes older testscript
118    o large number of package inclusion and header cleanups
119    checkpoint51i_pre
120    
121    o new output for adjoin of global ocean vector invariant
122    o fix for checkpoint of thermodynamic seaice and bulk_force
123    o Steph gchem various cleanups
124    
125    checkpoint 51h_pre
126    o fixed some single quotes
127    o modify gchem pkg to be more versatile
128    o modifications to clean up dic pkg
129    o add pkg/cfc
130    
131    checkpoint51g_post
132    o provide links for ARPACK and ADM*TLM
133    o start removing verification/vero/
134    o update AD-related stuff
135      (in particular some IF-statements in model/src/ routines)
136    o adding to verification/global_ocean.90x40x15/ adjoint of
137      vector invariant setup
138    
139    checkpoint51f_post
140    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
141    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
142      of tracer Green's fucntions for ocean inversion project.
143    
144    checkpoint51f_pre
145    o Added on-the-fly spatial interpolation capability
146        "USE_EXF_INTERPOLATION" to pkg/exf.
147      - This is a temporary Cartesian-grid hack until
148        the super-duper ESMF coupler becomes available.
149      - See verification/global_with_exf/README for usage example.
150      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
151        flags and modified pkg/seaice accordingly.
152    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
153        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
154        non-local transport term.
155    
156    checkpoint51e_post
157    o pkg/mom_vecinv:
158      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
159      - add time-ave diagnostic of vorticity advection.
160    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
161    o atmospheric geopotential: - include water vapor effect;
162                                - use p^kappa in p* scaling.
163    o land pkg: read initial state from files.
164    o AIM : add stratospheric drag in the upper level
165    
166    checkpoint51d_post
167    o change function ILNBLNK (=> last non-blank char.) to return zero
168      (instead of the string length) when the string. char is empty
169    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
170    o modif's to restore TAMC compatibility
171      - avoid "_d" constructs in PARAMETER declarations
172      - avoid interrupting lines by comment lines
173    o Use cluster local disks for purely local I/O
174      vs. globally visible disks needed for ctrl stuff
175      (merged from ecco-branch)
176      - new active_file_loc... and mdsio_..._loc routines
177      - affected packages: autodiff, ctrl, grdchk, mdsio
178    
179    checkpoint51c_post
180    o introducing integer flag debugLevel
181      - debLevZero: suppress all output
182      - debLevA: standard
183      - debLevB: equivalent to current debugMode=.TRUE.
184    o introducing pathname variable mdsioLocalDir for mdsio
185      that can be specified at runtime
186      (relevant for cluster I/O to local disk)
187    `
188    >>>checkpoint51b_post
189    adjoint of ptracers
190    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
191    o extended state in checkpoint_lev?, etc.
192    o alternative ctrl/cost with tr1 or ptracer
193    o new comlev1_bibj_ptracers
194    o new ptracers.flow
195    o made ptracers_forcing same as external_forcing_s
196    o added verification for adjoint with ptracers
197      - adm. grdchk fail so far
198      - tlm. grdchk OK
199      - checked tapelev/comlev recomputations: OK
200    <<<checkpoint51b_pre
201    
202    checkpoint51a_post
203    o added code for biogeochemistry package
204      - new pkgs: dic, gchem
205      - new subroutine in ptracers
206    o modify code for biogeo packages
207      - in model/src and pkg/ptracers
208    
209    checkpoint51
210    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
211      - autodiff, ctrl, exf, grdchk, seaice
212      kept separate packages
213      - cost, ecco, obcs
214    o updating verification/internal_wave, verification/lab_sea
215      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
216    
217    checkpoint50i_post
218    o Preparing next differentiable checkpoint and sync
219      of MAIN vs. ecco-branch
220      - 1st step: this one is differentiable
221      - 2nd step: next(! not this) checkpoint will have updated packages
222                  from ecco-branch)
223    
224    checkpoint50h_post
225    o new package "land": provide surface BC for AIM.
226    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
227    o AIM: use true log-P extrapolation for near surface temp (= as in
228        F.Molteni paper) ; update aim.5l_cs output.
229    o New variable in PARM03 for more flexible pickups
230    o somewhat cleaned package initialisation sequence for
231      ctrl/ cost/ ecco/ in packages_... routines
232    
233    checkpoint50g_post
234    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
235      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
236      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
237        made the default because of faster convergence than ADI
238    
239    checkpoint50f_post
240    o exf totally restructured
241      - replaced all exf_set_ routines by one generic exf_set_gen.F
242        and made sure it's still differentiable
243      - split exf_getffields.F into new exf_bulkformulae.F
244      - exf_inscal_/exf_outscal_ suffixes consistent with field names
245      - updated adjoint/makefile and relevant verif. accordingly
246    
247    checkpoint50f_pre
248     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
249          + change Evap over land. (update aim.5l_cs output)
250     o added missing .cvsignores and made uniform across expts
251     o changed configuration of tidal_basin_2d expt
252     o added pkg/debug functions for tracing code in fatal crashes
253     o tidied pkg/monitor to use MONITOR_OPTIONS.h
254     o new fn in pkg/monitor to stop model if solution grows too big
255     o removed lots of single quotes from comments
256    
257    checkpoint50e_post
258    o make KPP work with PTRACERS
259     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
260       nearly a copy of kpp_transport_s
261     - there is no analogue to SurfaceTendencyS, so I have to use
262       gPtr(of the surface layer) instead
263    o add a new platform SunFire+mpi (SunFire 15000) to genmake
264    checkpoint50e_pre
265    
266    checkpoint50d_post
267    o change kpp output from multiple-record state files to single-record state
268      files analogous to write_state.F
269    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
270      analogous to the cg2d-related output.
271    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
272      so that writing to internal file fn (with length 512) fails.
273    checkpoint50d_pre
274    
275    checkpoint50c_post
276    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
277    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
278    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
279    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
280    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
281    
282    checkpoint50c_pre
283    Merging from release1_p13:
284    o bug fix for pkg/seaice dynamic solver
285    o Added SEAICE_initialHEFF to pkg/seaice
286    
287    checkpoint50b_post
288    o store u*,v* in gU,V instead of in guNm1,gvNm1
289    o in order to put the momForcing out of the Adams-Bashforth:
290      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
291      to timestep.F
292    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
293    o re-generate output for highly sensitive test-exp:
294       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
295    
296    checkpoint50b_pre
297    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
298    o corrected CPP option mismatch in exf_Bulk... functions for case
299      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
300    
301    checkpoint50a_post
302    o Bug fix for merging between c50 and KPP.
303      ikey was passed from thermodynamics to kpp_calc via
304      common block rather than being recomputed in kpp_calc,
305      in contradiction with new key itdkey.
306      New key ikppkey created, and tamc.h headers updated.
307    
308    checkpoint50
309    - 2nd step of merge with ecco-branch:
310      merge changes in ecco-branch back into main trunk
311    - bug fix in find_alpha
312    - more storing in gmredi_calc_tensor.F, kpp_routines.F
313    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
314    - merged some sliced AD support routines
315    
316    checkpoint49
317    merged from ecco-branch:
318    o exf:
319      - Enable initialisation of forcing fields to constant
320        (runtime) values.
321      - in exf_getffields.F
322        Reduce i-/j-loop to interior domain, discarding overlaps.
323        That also fixes wrong TAF-key computations for key_1, key_2
324        with bulf formulae.
325      - exf_init.F modify #ifdef for exf_init_evap
326      - exf_getffieldrec.F, ctrl_getrec.F
327        The following INT-usages are not safe:
328          fldsecs  = int(fldsecs/fldperiod)*fldperiod
329          fldcount = int(fldsecs/fldperiod) + 1
330        and were modified.
331    o autodiff: checkpoint_lev...
332      - updated storing for bulk formulae (some arrays were missing)
333      - added state for seaice package
334      - synchronized with main branch
335    o DIVA:
336      Modif.s in
337      - the_main_loop.F
338      - the_model_main.F
339      and added cost_final_restore.F cost_final_store.F
340      o With these changes, it is possible to fully separate
341        the first forward run to compute the cost function (mdthe_main_loop)
342        and adjoint runs over individual DIVA intervals (adthe_main_loop)
343        into separate model executions.
344        This enables better tuning of DIVA to given queue sizes.
345      o Loss of cost function value in consecutive DIVA runs is
346        fixed by storing to 'costfinal' file.
347      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
348        beginning/end of adjoint integration is accounted for.
349      The current changes apply to TAF-1.4.26.
350      TAF has one remaining bug, requiring one manual change
351      (see MITgcm manual).
352    o cal: synchronized between MAIN and ecco-branch
353    
354    checkpoint48i_post
355    o Changes to restore differentiability of code w.r.t. previous tag
356      (mostly adding new routines to make list and replacing
357      pressure by totPhiHyd).
358    o Updated and merged grdchk package
359      - has both ADM and TLM checks
360      - works for single- and multi-proc.
361      - output cleaned
362      - worked successfully for parallel DIVA
363    o genmake:
364      - Adding -platform=SP4
365      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
366    o Modif. for DIVA:
367      ctrl_unpack should not be called in intermediate DIVA interval.
368      (similar thing would apply for active files such as
369      tbar, sbar, psbar, which should not be reinitialised;
370      only relevant for ecco-branch)
371    
372    checkpoint48h_post
373    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
374    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
375    o Added SEAICE_initialHEFF to pkg/seaice
376    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
377    
378    checkpoint48g_post
379    --- EOS:
380    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
381      store total Potential in totPhyHyd for diagnostics & EOS.
382    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
383    --- Pressure/geopotential gradient:
384    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
385    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
386      ( changes results of global_ocean_pressure )
387    o NLFS + z-coord.: add eta*Rho' contribution.
388    o accurate phiHyd when using interface-W at the middle between 2 centers
389     ( changes results of ideal_2D_oce )
390    o includes r* 2nd term in potential gradient.
391    
392    checkpoint48f_post
393    Merging from release1_p12:
394    o Modifications for using pkg/exf with pkg/seaice
395      - improved description of the various forcing configurations
396      - added basic radiation bulk formulae to pkg/exf
397      - units/sign fix for evap computation in exf_getffields.F
398      - updated verification/global_with_exf/results/output.txt
399    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
400      (SBO) core products, including oceanic mass, center-of-mass,
401      angular, and bottom pressure (see pkg/sbo/README.sbo).
402    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
403      to avoid negative values in shallow regions.
404      - updated verification/natl_box/results/output.txt
405      - updated verification/lab_sea/results/output.txt
406    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
407    o Added useSingleCpuIO option (see PARAMS.h).
408    o Updated useSingleCpuIO option in mdsio_writefield.F to
409      work with multi-field files, e.g., for single-file pickup.
410    o pkg/seaice:
411      - bug fix in growth.F: QNET for no shortwave case
412      - added HeffFile for specifying initial sea-ice thickness
413      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
414    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
415      kpp_transport_t.F, forward_step.F, and the_main_loop.F
416    o pkg/seaice:
417      - adjoint-friendly modifications
418      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
419    
420    checkpoint48e_post
421    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
422    o dynamics: change definition of computational domain & adapt mom_fluxform
423      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
424    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
425        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
426        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
427        global_ocean.90x40x15 global_with_exf global_ocean_pressure
428        inverted_barometer solid-body.cs-32x32x1
429      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
430    
431    checkpoint48d_post
432    o in preparation for r*:
433     a) use pre-computed gradient of hydrostatic potential:
434        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
435     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
436        => affects results of glob_oce_pressure (different truncation error)  
437      update output.txt of ideal_2D_oce & global_ocean_pressure
438    
439    checkpoint48d_pre
440    o in preparation for r*:
441      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
442      pass the 2 comp. of the grad. as arguments to momentum S/R.
443      but for the moment, only used if it does not change the results.
444    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
445    
446    checkpoint48c_post
447    Modifications in treatment of initial flux forcing controls
448    to avoid extra storing of flux fields.
449    
450    checkpoint48c_pre
451    o Added tidal_basin_2d experiment (currently 1D!)
452    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
453    
454    checkpoint48b_post
455    o r* coordinate added in #ifdef NONLIN_FRSURF block.
456     (modification to pressure gradient not yet implemented)
457    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
458      (for U & V) that are used for vertical advection of momentum.
459    
460    checkpoint48a_post
461    o In preparation for r*, use temp. array to compute vertical transport
462       in flux-form momentum pkg. => change results of few test-exp.
463      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
464                        lab_sea, natl_box & plume_on_slope
465    
466    checkpoint48
467    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
468    
469    checkpoint47j_post
470    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
471    o moved adexch from forward_step to addummy_in_stepping
472    o added exch in ctrl_map_...
473    o aveFreq.=0. at end of cost_final to avoid overwrite in
474      reverse checkpointing loop
475    o Yet more changes in gmredi:
476      * adgmredi_calc_tensor
477        avoiding all recomputation of gmredi_slope_limit
478      * adgmredi_x/y/rtransport
479        added flag for excessive storing to avoid recomp. of
480        u/v/rtans, dTdx/y/z
481        -> this is not really necessary and very memory-consuming
482      * adgmredi_slope_psi:
483        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
484      * gmredi_slope_limit
485        re-activated full calculation of taperfct for case 'ac02'
486    o updating verification/ adjoints of carbon, global_ocean.90x40x15
487    
488    checkpoint47i_post
489    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
490    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
491      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
492    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
493    o gmredi: fix few bugs.
494    
495    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
496    This will be a good checkpoint to plug into the ecco-branch.
497    o few modif.'s to get latest version adjointed
498      (mainly kick out code in ini_linear_phisurf)
499    o modif's to run adjoint with exactConserv
500    o case GM_BOLUS_ADVEC should be cleaned
501      S/R gmredi_slope_psi should be cleaned
502    o verification/carbon now has exactConserv=.TRUE.
503    
504    checkpoint47g_post
505    o time-average AIM output: becomes independent from statvars time-average
506      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
507    o After TAF bug fix:
508      Tested adjoint of gmredi package.
509      Tests were done with checkpoint47 rather than with latest
510      checkpoint47f_post since the latter is broken for the adjoint
511      verification/carbon/ contains both ADM and TLM gradient checks.
512    Here they are, before they get changed/lost/stolen.
513    Mostly modif.'s to fix numerical sensitivities.
514    Gradient checks OK for
515    - GM_taper_scheme:
516      * clipping
517      * ac02
518      * linear
519      * glw91
520      * dm95
521      * ldd97
522    - GMREDI_OPTIONS:
523      * GM_VISBECK_VARIABLE_K
524      * GM_NON_UNITY_DIAGONAL
525      * GM_EXTRA_DIAGONAL
526      * GM_BOLUS_ADVEC
527    in conjunction with data.gmredi parameters to be checked in
528    in a few minutes under verification/carbon/code/
529    
530    checkpoint47f_post
531    Merging from release1_p10:
532    o modifications for using pkg/exf with pkg/seaice
533      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
534        and SEAICE_EXTERNAL_FLUXES
535      - pkg/exf CPP options EXF_READ_EVAP and
536        EXF_NO_BULK_COMPUTATIONS
537      - usage examples are Experiments 8 and 9 in
538        verification/lab_sea/README
539      - verification/lab_sea default experiment now uses
540        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
541    
542    checkpoint47e_post
543    o created a tag prior to creating a branch
544    
545    checkpoint47d_post
546    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
547      at the bottom boundary had an erroneous half slip boundary condition
548    o added bottom drag and no slip boundary condition capabilities to
549      oceanic pressure coordinates code
550    o added new verification experiment global_ocean_pressure, this experiment is
551      also described in the tutorial section of the manual
552    checkpoint47d_pre
553    
554    checkpoint47c_post
555    o Added a verification experiment for a global cubed-sphere ocean run
556      -  verification/global_ocean.cubed32x32x30
557      -  uses pkg/therm_seaice and pkg/bulk_forcing
558    
559    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
560    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
561      when using P-coordinate; only implemented for atmospheric config.
562    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
563      NOTES: requires option NONLIN_FRSURF to be "#define".
564    o update advect_xz/results/output.txt (left from checkpoint44g_post)
565    
566    checkpoint47b_post
567    Merging from release1_p9:
568    o pkg/seaice
569      - removed GOTO's and added taf directives
570      - double precision constants to reduce the g77 (Linux)
571        to F77 (SGI) differences reported in release1_p8
572    o tools/genmake
573      - added SGI options
574    o verification/testscript
575      - updated to that of checkpoint47a_post
576    o verification/global_ocean.90x40x15/input/eedata
577      - modified for SGI f77 compatibility
578    o verification/lab_sea
579      - added description of sea-ice model
580      - added missing matlab routines
581      - added test of thermodynamics parallelization
582    
583    checkpoint47a_post
584    o new pkg: aim_v23
585     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
586       for now, keep the same surface forcing as before.
587     - Part-Cell implemented into AIM; check that Heat & Water are conserved
588     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
589     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
590    o add diagnostic of surface correction term in monitor output
591    
592    o bulk_force and therm_seaice
593    - Two packages:  bulk_force (Bulk forcing)
594      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
595    - Earlier integration from Stephaine Dutkiewicz
596      and Patrick Heimbach.
597    - Two ifdef statements for compile time,
598       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
599    
600    checkpoint47
601    differentiable version of checkpoint46n_post
602    o bug fix in quasihydrostaticterms
603    o * "clean" adjoint code (in terms of extensive recomputations)
604        can now be obtained for all GMREDI options (i.e. for
605        - GM_VISBECK_VARIABLE_K
606        - GM_NON_UNITY_DIAGONAL
607        - GM_EXTRA_DIAGONAL
608        - GM_BOLUS_ADVEC )
609      * However, wrong gradient check problem remains unsolved.
610      * New CPP options have been introduced for different
611        tapering schemes
612    o external_fields_load now part of differentiation list
613    o pressure needs multiple storing;
614      would be nice to have store_pressure at beginning or
615      end of forward_step, e.g. by having phiHyd global (5-dim.)
616      (NB: pressure is needed for certain cases in find_rho,
617      which is also invoked through convective_adjustment).
618    o recomputations in find_rho for cases
619     'JMD95'/'UNESCO' or 'MDJWF' are OK.
620    o #define ATMOSPHERIC_LOADING should be differentiable
621    o ini_forcing shifted to begining of initialise_varia
622    o Incorporating QNVS line search routines into MITgcm
623      (this is separate code, and therefore not under pkg)
624      lsopt/, optim/
625    o Updated verification/carbon/
626      - #define GM_VISBECK_VARIABLE_K
627      - GM_taper_scheme    = 'ldd97'    
628    
629    checkpoint46n_post
630    Merging from release1_p8:
631    o verification/natl_box:
632      updating new external_fields_load routine
633    o New package: pkg/seaice
634      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
635      The sea-ice code is based on Hibler (1979-1980).
636      Two sea-ice dynamic solvers, ADI and LSR, are included.
637      In addition to computing prognostic sea-ice variables and diagnosing
638      the forcing/external data fields that drive the ocean model,
639      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
640      The implied surface heat flux is then stored in variable
641      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
642      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
643      non-local transport term.  Because this call precedes model
644      thermodynamics, temperature under sea-ice may not be "exactly" at
645      the freezing point by the time theta is dumped or time-averaged.
646      N.B.: fairly large differences in accuracy occur across
647            different platforms/compilers; comparison between
648            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
649            generated output gives:
650       T           S           U           V
651      C D M    c        m  s        m  s        m  s        m  s
652      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
653      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
654      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
655    
656      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
657    o GAD:
658      - generated new common blocks to account for call of
659        same gad routines with differing traceridentities
660        (needed to modify tracerIdentity indices in GAD.h)
661      - generated separate common blocks for case useCubedSphereExchange
662        (Department of Futurology)
663      - parameter lists to gmredi_?transport: added tracerIdentity
664      - added new key indices to tamc.h
665    o external_fields_load:
666      - added this routine to TAF list
667      - needed to make some common blocks global and additional storing
668        along the same lines as exf package (checkpoint_lev?_directives.h)
669    o exf:
670      updated external forcing package
671      - bug fixes carried over from ecco-branch
672        (missing OBCS_OPTIONS.h in two routines)
673      - enable easy to use "no forcing".
674      - added exf I/O for atmospheric loading
675      - added exf I/O for runoff data
676      - transfered scaling between exf <-> MITgcm to exf namelist
677    o Adding new verification experiment global_with_exf.
678      This verification experiment is almost identical to the
679      global_ocean.90x40x15 experiment, except that it uses
680      the exf (and cal) package instead of the
681      external_fields_load routine (cf README file).
682    
683    checkpoint46m_post
684    o modified testscript to return -- when there are no lines of "%MON" output
685    o added new flag "quasiHydrostatic" for QH mode
686      and new routine quasihydrostaticterms()
687    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
688      New routine: mom_u_coriolis_nh()
689    o fixed sign of non-hydrostatic metric terms in u and v equations.
690      Depend on correct sign of gravitySign.
691    o added work.pc* to .cvsignore in aim directories using ifc
692    o introduced flag for controllin non-hydrostatic metric terms
693    o removed gravitySign from PARM04
694    o switched to g77/ifc from pgf77 in aim experiments
695    
696    checkpoint46l_post
697    o made convective adjustment work with pressure coordinates:
698     - changed the direction of k-loop in convective_adjustment.F for the
699       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
700     - adjusted the reference pressure k-index in convective_adjustment.F
701     - adjusted the convection condition in convect.F (in analogy to
702       calc_ivdc.F)
703     - convective_adjustment no longer computes anything on the halos
704     - removed the warnings about negative salinity from find_rho.F and
705       find_alpha.F; instead the new routine look_for_neg_salinity, called
706       at the beginning of find_rho, find_alpha, and find_beta, does a
707       check of the entire slice, if CPP-option
708       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
709    checkpoint46l_pre
710    
711    checkpoint46k_post
712    o fixed the verification/global_ocean.90x40x15 experiment:
713     - new bathymetry (the world according to A., JMC, and M.)
714     - new initial fields and forcing fields (*.bin files)
715     - new POLY3.COEFFS (for the next release one should switch to a full
716       equation of state: JMD95P or MDJWF)
717     - fixed several errors and redundancies in the data file
718     - experiment uses looped cells
719     - added matlab directory with diagnostic scripts for plotting of output
720    
721    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
722     - read AIM physics parameters from a file (data.aimphys)
723     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
724    
725    checkpoint46j_post
726    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
727    o move wVel computation at the end of the time step, in S/R integr_continuity
728    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
729    o update timeave pkg for wVel diagnostic.
730    checkpoint46j_pre
731    
732    checkpoint46i_post
733    o Clean up AIM package (and keep the results unchanged):
734      include CPP_OPTION and use IMPLICT NONE in all routines ;
735      declare all the variables _RL ; use _d 0 for all numerical constants.
736      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
737    
738    checkpoint46h_post
739    o cleaned up the use of rhoNil and rhoConst.
740      - rhoNil should only appear in the LINEAR equation of state, everywhere
741        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
742        and the dynamical equations are all divided by rhoConst
743    o introduced new parameter rhoConstFresh, a reference density of fresh
744      water, to remove the fresh water flux's dependence on rhoNil. The default
745      value is 999.8 kg/m^3
746    o cleanup up external_forcing.F and external_forcing_surf.F
747      - can now be used by both OCEANIC and OCEANICP
748    checkpoint46h_pre
749    
750     Added code to convert surface volume flux (fresh water) into
751     a mass flux when using P coordinates in the ocean (OCEANICP).
752     Note: It assumes you have set rho0=rhoConst=density of fresh water.
753    
754    checkpoint46g_post
755    o Include a new diagnostic variable phiHydLow for the ocean model
756      - in z-coordinates, it is the bottom pressure anomaly
757      - in p-coordinates, it is the sea surface elevation
758      - in both cases, these variable have global drift, reflecting the mass
759        drift in z-coordinates and the volume drift in p-coordinates
760      - included time averaging for phiHydLow, be aware of the drift!
761    o depth-dependent computation of Bo_surf for pressure coordinates
762      in the ocean (buoyancyRelation='OCEANICP')
763      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
764        Theta, Salinity, and Pressure in the parameter list. This routine is
765        presently contained in find_rho.F. This routine does not give the
766        correct density for 'POLY3', which would be a z-dependent reference
767        density.
768    o cleaned up find_rho
769      - removed obsolete 'eqn' from the parameter list.
770    o added two new verification experiments: gop and goz
771      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
772    checkpoint46g_pre
773    
774    checkpoint46f_post
775    o Enable tangent linear (forward mode) gradient checks:
776      - extended active file handling to g_... files
777      - added TANGENT_SIMULATION to theSimulationMode
778      - extended grdchk package accordingly
779    o added tangent linear setup in verification/carbon/code_ftl
780    o added adjoint setup in verification/front_relax/code_ad
781    
782    checkpoint46e_post
783    o Added new equation of state -> MDJWF
784      - EOS of McDougall et al., 2002, JAOT, submitted
785      - caveat: the equation of state is only valid for a smaller (more
786        realistic?) range of values than JMD95P/Z and UNESCO
787      - added masks to the calculation of pressure in store_pressure
788      - added more check values for density in check_eos (ini_eos.F), some of
789        the old check values are out of the range of the MDJWF-eos, so don't
790        expect perfect matches for those
791    checkpoint46e_pre
792    
793    checkpoint46d_post
794    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
795      'OCEANICP', also initialised field pressure correctly in ini_eos in the
796      case of pressure coordinates. eosType='JMD95Z' in
797      combination with buoyancyRelation='OCEANICP' now causes an error.
798    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
799      in find_alpha/beta.
800    checkpoint46d_pre
801    
802    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
803      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
804    
805    checkpoint46c_post
806    o Changes necessary for ocean in p-coordinates
807     -  Added new buoyancy relation = 'OCEANICP'
808     -  Added new parameters = gravitySign (this used to be contained inside
809        the factor dRdZ which I added when we first switched to R coordinates).
810     X GM/Redi is not compatible (yet)
811     X bottom drag and no-slip need to be debugged.
812    checkpoint46c_pre
813    
814    checkpoint46b_post
815    o Added new equation of state -> JMD95Z and JMD95P
816      - EOS of Jackett and McDougall, 1995, JAOT
817      - moved all EOS parameters into EOS.h
818      - new routines ini_eos.F, store_pressure.F
819    o Added UNESCO EOS, but not recommended because it requires
820      in-situ temperature (see JMD95)
821    o Modified formatting for knudsen2.f in utils/knudsen2 and added
822      unesco.f to be used with POLY3
823    checkpoint46b_pre
824    
825    checkpoint46a_post
826    o Added (atmospheric) pressure loading
827      - new field in FFIELDS.h, etc...
828      - new cpp flag ATMOSPHERIC_LOADING
829    o Changed hFacC to _hFacC in calc_phi_hyd.F
830    o Added SHORTWAVE_HEATING to some files for consistency
831    checkpoint46a_pre
832    
833    checkpoint46
834    further merges from release1_p5
835    o new ctrl package
836      - adopted from ECCO environment to enable optimization
837      - added Eliassen Palm fluxes to controls
838    o added Eliassen Palm flux controls to gradient check package
839    o cost package
840      - Compatible with new ctrl package
841      - added Eliassen Palm cost hooks
842      - modif's of existing cost functions
843    o Adjoint-related bug fixes in kpp:
844      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
845      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
846    o autodiff package
847      - flow directives:
848        + new for S/R do_the_model_io
849        + enhanced for S/R checkpoint
850        + new gmredi.flow
851      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
852        disable adcommon.h/g_common.h by default.
853      - fixed problem for adjoint of global_max
854    o modified verification/carbon/
855    o New setup for adjoint of global_ocean
856    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
857    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
858    o incorporated hooks for sponge layer code (external_forcing.F)
859    
860    checkpoint45d_post
861    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
862    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
863      (affects plume_on_slope "cg2d" output)
864    o add new parameter deltaTfreesurf for free-surface time stepping
865    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
866    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
867    o change phiMin in exp1 (to agree with documentation)
868    o add new flags:
869     - T,S forcing inside/outside Adams-Bashforth
870     - turn off temp,salt advection and/or forcing
871     - for each tracer, define internal flag for multiDimAdvection & A-B
872    o monitor: change definition of KE to check conservation of Energy
873    
874    checkpoint45c_post
875    o Removed f90 comments ("!")
876    o Modified initialisations to enable exf package for MITgcm
877      (without invoking ECCO_PACKAGE).
878    o modifications to gradient check package (Martin Losch)
879      - enable centered differences
880      - modified format of standard output
881    
882    checkpoint45b_post
883    o cleaned exchange calls in cg2d
884    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
885    o included CPP option SINGLE_LAYER_MODE in thermodynamics
886      to configure barotropic setup (Martin Losch)
887    o moved some initialisations within bi,bj loop in dynamics
888      (TAF flow dependency)
889    o in initialise_varia, moved call packages_init_variables
890      before convective_adjustment_init
891      (corresponding adjustment of TAF tape initialisation).
892    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
893    
894    checkpoint45a_post
895    o compute Rho over the whole domain (extend iMin,jMin indices)
896    o specific exchange for X-slice domain (case Ny=1)
897    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
898    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
899    
900    checkpoint44h_post = checkpoint45
901    o Fix to restore differentiability:
902      place at which packages_init_variables is called in
903      initialise_varia is crucial for reverse control flow.
904    o modifications in GMRedi to enable stable adjoint
905      (corresponding modif's in thermodynamics, dynamics)
906    o added missing hook for sponge layer code in external_forcing
907    o modified test cost functions
908    o storing in gad_advection (plus removal of write(0,*)!
909    o missing headers TR1.h added in convective_adjustment routines
910    o errorMessageUnit set non-equal zero in eeboot
911      (conflict on some platforms, e.g. IBM SP3)
912    o modified carbon verif.
913    
914    checkpoint44h_pre
915    o vertical grid option: allow to put the Interface at the middle between
916      2 cell-centers ; replace delZ in pkg/kpp by drF.
917    o GM Advective form: Tracers are advected using the residual transport (=
918      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
919    
920    checkpoint44g_post
921    o fix surface correction term in multiDimAdvection (affects plume_on_slope
922      results) ; ifdef missing in thermodynamics.F
923    
924    checkpoint44f_pre,checkpoint44f_post
925    o added PTRACERS package
926      This allows an arbitrary number of passive tracers to be integrated
927      forward simultaneously with the dynamicaly model.
928      + Implemented so far:
929        - basic forward algorithm (time-stepping, advection, diffusion, convection)
930        - I/O and checkpointing
931        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
932      + Not implemented so far:
933        - KPP
934        - OBCS
935      + No specific example supplied (yet) but global_ocean.90x40x15 has the
936        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
937        line in data.pkg.
938      + This package is disabled by default since it increases storage.
939    
940    
941    o testscript: added -cleanup option
942    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
943                 b) enable to filter 2D fields.
944    
945    checkpoint44e_pre,post
946    o re-wrote convective adjustment to use pre-calculated weights
947      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
948      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
949      Original calls to convect() still in place.
950    
951    chkpt44d_pre,post
952    o added missing EXCLUDE_MONITOR flags
953    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
954      (incompatible typ in MIN/MAX expressions caused problems
955      on IBM SP3)
956    o in genmake added variable MAKEDEPEND
957      plus resetting for case SunOS
958    o added timer_stats.c routine for IBM SP3
959    o removed variables in dynamics
960    !!! I forgot to create tag chkpt44d_pre !!!
961    !!! But chkpt44d_pre = chkpt44c_post    !!!
962    
963    o real fresh water flux implemented with non-linear free-surface.
964    
965    chkpt44c_pre,post
966    o few fix (mask in shap_s2, EmPmR in external_field_load,
967      USE_NATURAL_BCS in solve_for_P);
968    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
969    
970    checkpoint44b_pre/_post
971    o merge of relevant stuff from the ecco-branch:
972      - genmake: removed $S64 overwrite for case SunOS
973      - pkg/exf: update and corrections for field swapping and obcs
974      - pkg/ecco: parameter lists for the_model_main, the_main_loop
975                  harmonized between ECCO and MITgcm
976      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
977                      updated checkpointing_lev... lists for obcs
978      - model/src: minor changes in forward_step, plot_field
979                   added directive for divided adjoint in the_main_loop
980      - pkg/mdsio: added mdsio_gl_slice
981    
982    o check parameters & config (chkpt44a_pre,post)
983    o OBC and NonLin_FrSurf.
984    
985    checkpoint44
986    o fix bug in mom_vi_del2uv
987    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
988    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
989    o update AIM experiments (NCEP input files)
990    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
991    o added some stuff for AD
992    
993    checkpoint43
994    o added two new advection tests
995    o added global 4x4 degree ocean test
996    o added test of H&S94 with free surface on cube
997    o some final mods for gradient check, adjoint,...
998    
999    checkpoint42
1000      Fixed AD-related problems:
1001    o Store directives up-to-date with re-arranged Adams-Bashforth
1002      (mainly thermodynamics.F)
1003    o New store directives for multi-dim. advection schemes
1004      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1005      * new common block and key passkey
1006      (mainly gad_advection.F)
1007    o Modified store directives for split of dynamics/thermodynamics
1008      for the case ALLOW_KPP
1009    o Cleaned argument list for timestep_tracer.F
1010    
1011    checkpoint41
1012    o re-formatted/added comments in prologues of key subroutines
1013      to work with protex
1014    
1015    checkpoint40
1016    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1017    o added FLT (floats) package from Arne along with demo. experiment
1018    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1019      implementation of forward-in-time forcing terms
1020    o more mods for non-linear free-surface including new variable
1021    o modified multi-dim method to work on cube
1022    o bug fix in KPP (from DM)
1023    
1024    checkpoint40pre9
1025    o added DST advection schemes
1026    o fix MPI bug on SGI's
1027    o modifications for non-linear free-surface
1028    o fixed conditionals for fixed flow/passive tracer only mode
1029    o added tension/strain form of stress tensor
1030    o changes to commenting of arguments for TAF/TAMC
1031    o added/updated many matlab scripts
1032    o added multi-dimensional advection method for tracers
1033      
1034    checkpoint40pre8
1035    o new package rw/
1036      Added method for dumping intermediate local arrays:
1037      mdsio_writetile - same as mdsio_writefield except works from inside
1038                        bi,bj loop
1039      mdsio_writelocal - same as mdsio_writetile except works for local
1040                         arrays
1041      write_local_r? - higher-level wrapper for mdsio_writelocal
1042      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1043      Example given at end of mom_vecinv.F that dumps some local arrays.
1044    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1045      control flux-form versus vector invariant code.
1046      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1047      or genmake -DISABLE ...
1048    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1049      (additional storing is now needed for case vecinv;
1050      currently nothing implemented to switch this storing off
1051      in case fluxform is used since no CPP flag available).
1052    
1053    checkpoint40pre7
1054    o bug fix in dynamics.F
1055      calc_viscosity called before k=1,Nr loop.
1056    o added some #ifdef's ALLOW_PASSIVE_TRACER
1057    o cleaned initialisations in ctrl_map_ini
1058      related to TAF
1059    
1060    checkpoint40pre6
1061    o split dynamics into thermodynamics & dynamics
1062    o corresponding split of calc_diffusivity into
1063      calc_diffusivity, calc_viscosity
1064      (kpp_calc_diff, kpp_calc_visc).
1065    o Added diffkr, kapgm to control variables
1066    o bug fix in gmredi_slope_limit for ldd97
1067    
1068    checkpoint40pre5
1069    o proper initialization of Adams-Bashforth time stepping
1070      + uses forward step for very first step of model (iter=0)
1071    o re-generated *all* output since almost all output is modified by this
1072      change (sorry but we've been putting this one off for about 2 years)
1073      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1074        *not* regenerated since they are already out of date and I don't
1075        want to create the impression that they are suddenly working.
1076    o removed KAP stuff for DEC's
1077    o modified/added many .cvsignore files in */code and */input
1078    o added new expt "solid-body.cs-32x32x1"
1079      + this uses an alternative form of ini_curvilinear_grid.F which
1080        is not necessarily any better than the current one...
1081    
1082    checkpoint40pre4
1083    o added re-initialisations of utrans,vtrans,rtrans in
1084      calc_common_factors which are crucial for TAF.
1085    o extended iMin,jMin range for calc_common_factors,
1086      calc_diffusivity
1087    o added option ALLOW_PASSIVE_TRACER
1088    o a few minor updates and fixes
1089    
1090    checkpoint40pre3
1091    o created calc_gtr1.F for gad package
1092    o split the_main_loop and re-introduced forward_step
1093    o some recomputations of nIter0 for TAMC
1094    
1095    checkpoint40pre2
1096    o Updated to latest branch of AJA, JMC
1097    o Added gradient check package
1098    o Added routines for passive tracer handling
1099    o Added carbon sequestration sensitivity experiment
1100    
1101    checkpoint39
1102     o Modifications and fixes to support TAMC
1103       (mainly missing or wrong directives)
1104     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1105       in addummy_in_stepping
1106     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1107     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1108     o Included following packages:
1109       cal: calendar
1110       exf: external forcing
1111       ecco: essential routines to control use of cal, exf
1112             (NB: this is not the full ECCO environment)
1113     o disabled some packages by default in genmake
1114    
1115    checkpoint38
1116     o see notes_c37_adj.txt
1117     o corrected wrong layer index in external_forcing_t
1118     o replaced the_main_loop/forward_step by the_main_loop
1119     o removed forceoutput from write_state
1120       (replaced criteria for initial/final state)
1121     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1122    
1123    checkpoint37
1124     o mdsio.F routine split and packaged in pkg/mdsio
1125       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1126        used unless genmake -disable=mdsio)
1127     o allow a more precise surface-geopotential gradient for the atmosphere
1128       taking into account the change in space of Alpha (=1/rho) at the surface.
1129     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1130       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1131     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1132       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1133       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1134     o Time-Average diagnostics defined as a pseudo package "timeave".
1135     o pickup files : old pickup (before c35) did not work with new code (c35
1136       and after) unless activating 2 commented lines in initialise-varia.
1137     o Non-Hydrostatic pickup file Pb fixed.
1138     o bug with Rigid-lid version (since c35) fixed.  
1139    
1140    checkpoint36
1141     o implement Crank-Nickelson barotropic time-stepping
1142     o recover Time-Average diagnostics
1143     o fix Pb in checkpoint (PR#19)
1144     o AIM become a standard package ; clean unused CPP_kees
1145    
1146    checkpoint35
1147     o subtantial rewrite of dynamics.f
1148     o allows staggered time-stepping
1149     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1150     o added bottom drag (linear + quadratic)
1151    
1152    checkpoint34
1153     o Modified exchange routines for correct reverse simulation.
1154     o Added verification output to comply with bug fix in impldiff.F
1155       as of c33 (exp2, natl_box).
1156     o Corrected store directives in dynamics.F
1157     o Corrected array boundaries in impldiff.F
1158     o Corrected array dimensions in gmredi.
1159       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1160     o Added routine GLOBAL_SUM_INT to global_sum.F
1161     o Added mdsio_gl.F for ECCO purposes.
1162    
1163    checkpoint33
1164     o Fixed bug in lower BC in impldiff.F
1165     o Fixed confusion about units of forcing arrays in FFIELDS.h
1166       namely Fu,Fv,Qnet,Qsw,EmPmR:
1167       - Removed verification/natl_box/code/external_fields_scale.F
1168         (did not differ from that in model/src)
1169       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1170         (see FFIELDS.h for description)
1171       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1172         kpp_calc.F and kpp_transport_t.F
1173       - Removed model/src/external_fields_scale.F and calls to it
1174       - verification/natl_box uses flux data with "atmospheric" sign so
1175         a special version of external_fields_load.F is used to
1176         change the data as it's read in. This way, the arrays
1177         have the right units and signs at all times tha a user could
1178         possibly use them.
1179     o Corrected genmake to delete a temporary file during configuration
1180    
1181    checkpoint32
1182     o Scaling of forcing fields moved from external_forcing.F to
1183       external_fields_scale.F, called directly after loading fields.
1184     o Surface relaxation terms added to surface tendency fields in
1185       extra subroutine.
1186     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1187       fields.
1188     o Changes in GMRedi to comply with packaging structure.
1189     o Modifications and bug fixes in KPP package.
1190     o Verification experiment for KPP added (verification/nat_box/)
1191    
1192    checkpoint31
1193     o Packages interface brought in line with defined standard
1194       -> new routines packages_...F
1195       -> changes in initialise_fixed.F, initialise_varia.F
1196       -> enables initialisation interface for ECCO package
1197     o Rescaling of external forcing fields immediately after read
1198       (removed from external_forcing.F)
1199       -> new: surface_fields_scale.F
1200       -> affects ini_foorcing.F, external_fields_load.F
1201     o Computation of surface tendencies before tendency updates.
1202       -> new: external_forcing_surf.F
1203     o Change of variable names useGMRedi, useKPP, useECCO
1204     o Further changes in dynamics.F, impldiff.F for TAMC
1205     o Tested for experiments 0, 2, 4.
1206       - not yet tested for GMRedi.
1207       - not yet tested for KPP.
1208    
1209  checkpoint30  checkpoint30
1210   o Updates for OBCs   o Updates for OBCs
1211   o New experiment for test OBCs (internal_wave)   o New experiment for test OBCs (internal_wave)

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