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revision 1.8 by adcroft, Wed Jul 1 22:49:29 1998 UTC revision 1.181 by stephd, Mon Oct 6 20:54:01 2003 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint 51h_pre
7    o modify gchem pkg to be more versatile
8    o modifications to clean up dic pkg
9    o add pkg/cfc
10    
11    checkpoint51f_post
12    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
13    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
14      of tracer Green's fucntions for ocean inversion project.
15    
16    checkpoint51f_pre
17    o Added on-the-fly spatial interpolation capability
18        "USE_EXF_INTERPOLATION" to pkg/exf.
19      - This is a temporary Cartesian-grid hack until
20        the super-duper ESMF coupler becomes available.
21      - See verification/global_with_exf/README for usage example.
22      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
23        flags and modified pkg/seaice accordingly.
24    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
25        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
26        non-local transport term.
27    
28    checkpoint51e_post
29    o pkg/mom_vecinv:
30      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
31      - add time-ave diagnostic of vorticity advection.
32    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
33    o atmospheric geopotential: - include water vapor effect;
34                                - use p^kappa in p* scaling.
35    o land pkg: read initial state from files.
36    o AIM : add stratospheric drag in the upper level
37    
38    checkpoint51d_post
39    o change function ILNBLNK (=> last non-blank char.) to return zero
40      (instead of the string length) when the string. char is empty
41    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
42    o modif's to restore TAMC compatibility
43      - avoid "_d" constructs in PARAMETER declarations
44      - avoid interrupting lines by comment lines
45    o Use cluster local disks for purely local I/O
46      vs. globally visible disks needed for ctrl stuff
47      (merged from ecco-branch)
48      - new active_file_loc... and mdsio_..._loc routines
49      - affected packages: autodiff, ctrl, grdchk, mdsio
50    
51    checkpoint51c_post
52    o introducing integer flag debugLevel
53      - debLevZero: suppress all output
54      - debLevA: standard
55      - debLevB: equivalent to current debugMode=.TRUE.
56    o introducing pathname variable mdsioLocalDir for mdsio
57      that can be specified at runtime
58      (relevant for cluster I/O to local disk)
59    `
60    >>>checkpoint51b_post
61    adjoint of ptracers
62    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
63    o extended state in checkpoint_lev?, etc.
64    o alternative ctrl/cost with tr1 or ptracer
65    o new comlev1_bibj_ptracers
66    o new ptracers.flow
67    o made ptracers_forcing same as external_forcing_s
68    o added verification for adjoint with ptracers
69      - adm. grdchk fail so far
70      - tlm. grdchk OK
71      - checked tapelev/comlev recomputations: OK
72    <<<checkpoint51b_pre
73    
74    checkpoint51a_post
75    o added code for biogeochemistry package
76      - new pkgs: dic, gchem
77      - new subroutine in ptracers
78    o modify code for biogeo packages
79      - in model/src and pkg/ptracers
80    
81    checkpoint51
82    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
83      - autodiff, ctrl, exf, grdchk, seaice
84      kept separate packages
85      - cost, ecco, obcs
86    o updating verification/internal_wave, verification/lab_sea
87      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
88    
89    checkpoint50i_post
90    o Preparing next differentiable checkpoint and sync
91      of MAIN vs. ecco-branch
92      - 1st step: this one is differentiable
93      - 2nd step: next(! not this) checkpoint will have updated packages
94                  from ecco-branch)
95    
96    checkpoint50h_post
97    o new package "land": provide surface BC for AIM.
98    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
99    o AIM: use true log-P extrapolation for near surface temp (= as in
100        F.Molteni paper) ; update aim.5l_cs output.
101    o New variable in PARM03 for more flexible pickups
102    o somewhat cleaned package initialisation sequence for
103      ctrl/ cost/ ecco/ in packages_... routines
104    
105    checkpoint50g_post
106    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
107      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
108      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
109        made the default because of faster convergence than ADI
110    
111    checkpoint50f_post
112    o exf totally restructured
113      - replaced all exf_set_ routines by one generic exf_set_gen.F
114        and made sure it's still differentiable
115      - split exf_getffields.F into new exf_bulkformulae.F
116      - exf_inscal_/exf_outscal_ suffixes consistent with field names
117      - updated adjoint/makefile and relevant verif. accordingly
118    
119    checkpoint50f_pre
120     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
121          + change Evap over land. (update aim.5l_cs output)
122     o added missing .cvsignores and made uniform across expts
123     o changed configuration of tidal_basin_2d expt
124     o added pkg/debug functions for tracing code in fatal crashes
125     o tidied pkg/monitor to use MONITOR_OPTIONS.h
126     o new fn in pkg/monitor to stop model if solution grows too big
127     o removed lots of single quotes from comments
128    
129    checkpoint50e_post
130    o make KPP work with PTRACERS
131     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
132       nearly a copy of kpp_transport_s
133     - there is no analogue to SurfaceTendencyS, so I have to use
134       gPtr(of the surface layer) instead
135    o add a new platform SunFire+mpi (SunFire 15000) to genmake
136    checkpoint50e_pre
137    
138    checkpoint50d_post
139    o change kpp output from multiple-record state files to single-record state
140      files analogous to write_state.F
141    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
142      analogous to the cg2d-related output.
143    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
144      so that writing to internal file fn (with length 512) fails.
145    checkpoint50d_pre
146    
147    checkpoint50c_post
148    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
149    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
150    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
151    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
152    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
153    
154    checkpoint50c_pre
155    Merging from release1_p13:
156    o bug fix for pkg/seaice dynamic solver
157    o Added SEAICE_initialHEFF to pkg/seaice
158    
159    checkpoint50b_post
160    o store u*,v* in gU,V instead of in guNm1,gvNm1
161    o in order to put the momForcing out of the Adams-Bashforth:
162      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
163      to timestep.F
164    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
165    o re-generate output for highly sensitive test-exp:
166       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
167    
168    checkpoint50b_pre
169    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
170    o corrected CPP option mismatch in exf_Bulk... functions for case
171      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
172    
173    checkpoint50a_post
174    o Bug fix for merging between c50 and KPP.
175      ikey was passed from thermodynamics to kpp_calc via
176      common block rather than being recomputed in kpp_calc,
177      in contradiction with new key itdkey.
178      New key ikppkey created, and tamc.h headers updated.
179    
180    checkpoint50
181    - 2nd step of merge with ecco-branch:
182      merge changes in ecco-branch back into main trunk
183    - bug fix in find_alpha
184    - more storing in gmredi_calc_tensor.F, kpp_routines.F
185    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
186    - merged some sliced AD support routines
187    
188    checkpoint49
189    merged from ecco-branch:
190    o exf:
191      - Enable initialisation of forcing fields to constant
192        (runtime) values.
193      - in exf_getffields.F
194        Reduce i-/j-loop to interior domain, discarding overlaps.
195        That also fixes wrong TAF-key computations for key_1, key_2
196        with bulf formulae.
197      - exf_init.F modify #ifdef for exf_init_evap
198      - exf_getffieldrec.F, ctrl_getrec.F
199        The following INT-usages are not safe:
200          fldsecs  = int(fldsecs/fldperiod)*fldperiod
201          fldcount = int(fldsecs/fldperiod) + 1
202        and were modified.
203    o autodiff: checkpoint_lev...
204      - updated storing for bulk formulae (some arrays were missing)
205      - added state for seaice package
206      - synchronized with main branch
207    o DIVA:
208      Modif.s in
209      - the_main_loop.F
210      - the_model_main.F
211      and added cost_final_restore.F cost_final_store.F
212      o With these changes, it is possible to fully separate
213        the first forward run to compute the cost function (mdthe_main_loop)
214        and adjoint runs over individual DIVA intervals (adthe_main_loop)
215        into separate model executions.
216        This enables better tuning of DIVA to given queue sizes.
217      o Loss of cost function value in consecutive DIVA runs is
218        fixed by storing to 'costfinal' file.
219      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
220        beginning/end of adjoint integration is accounted for.
221      The current changes apply to TAF-1.4.26.
222      TAF has one remaining bug, requiring one manual change
223      (see MITgcm manual).
224    o cal: synchronized between MAIN and ecco-branch
225    
226    checkpoint48i_post
227    o Changes to restore differentiability of code w.r.t. previous tag
228      (mostly adding new routines to make list and replacing
229      pressure by totPhiHyd).
230    o Updated and merged grdchk package
231      - has both ADM and TLM checks
232      - works for single- and multi-proc.
233      - output cleaned
234      - worked successfully for parallel DIVA
235    o genmake:
236      - Adding -platform=SP4
237      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
238    o Modif. for DIVA:
239      ctrl_unpack should not be called in intermediate DIVA interval.
240      (similar thing would apply for active files such as
241      tbar, sbar, psbar, which should not be reinitialised;
242      only relevant for ecco-branch)
243    
244    checkpoint48h_post
245    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
246    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
247    o Added SEAICE_initialHEFF to pkg/seaice
248    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
249    
250    checkpoint48g_post
251    --- EOS:
252    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
253      store total Potential in totPhyHyd for diagnostics & EOS.
254    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
255    --- Pressure/geopotential gradient:
256    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
257    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
258      ( changes results of global_ocean_pressure )
259    o NLFS + z-coord.: add eta*Rho' contribution.
260    o accurate phiHyd when using interface-W at the middle between 2 centers
261     ( changes results of ideal_2D_oce )
262    o includes r* 2nd term in potential gradient.
263    
264    checkpoint48f_post
265    Merging from release1_p12:
266    o Modifications for using pkg/exf with pkg/seaice
267      - improved description of the various forcing configurations
268      - added basic radiation bulk formulae to pkg/exf
269      - units/sign fix for evap computation in exf_getffields.F
270      - updated verification/global_with_exf/results/output.txt
271    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
272      (SBO) core products, including oceanic mass, center-of-mass,
273      angular, and bottom pressure (see pkg/sbo/README.sbo).
274    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
275      to avoid negative values in shallow regions.
276      - updated verification/natl_box/results/output.txt
277      - updated verification/lab_sea/results/output.txt
278    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
279    o Added useSingleCpuIO option (see PARAMS.h).
280    o Updated useSingleCpuIO option in mdsio_writefield.F to
281      work with multi-field files, e.g., for single-file pickup.
282    o pkg/seaice:
283      - bug fix in growth.F: QNET for no shortwave case
284      - added HeffFile for specifying initial sea-ice thickness
285      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
286    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
287      kpp_transport_t.F, forward_step.F, and the_main_loop.F
288    o pkg/seaice:
289      - adjoint-friendly modifications
290      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
291    
292    checkpoint48e_post
293    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
294    o dynamics: change definition of computational domain & adapt mom_fluxform
295      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
296    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
297        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
298        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
299        global_ocean.90x40x15 global_with_exf global_ocean_pressure
300        inverted_barometer solid-body.cs-32x32x1
301      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
302    
303    checkpoint48d_post
304    o in preparation for r*:
305     a) use pre-computed gradient of hydrostatic potential:
306        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
307     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
308        => affects results of glob_oce_pressure (different truncation error)  
309      update output.txt of ideal_2D_oce & global_ocean_pressure
310    
311    checkpoint48d_pre
312    o in preparation for r*:
313      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
314      pass the 2 comp. of the grad. as arguments to momentum S/R.
315      but for the moment, only used if it does not change the results.
316    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
317    
318    checkpoint48c_post
319    Modifications in treatment of initial flux forcing controls
320    to avoid extra storing of flux fields.
321    
322    checkpoint48c_pre
323    o Added tidal_basin_2d experiment (currently 1D!)
324    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
325    
326    checkpoint48b_post
327    o r* coordinate added in #ifdef NONLIN_FRSURF block.
328     (modification to pressure gradient not yet implemented)
329    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
330      (for U & V) that are used for vertical advection of momentum.
331    
332    checkpoint48a_post
333    o In preparation for r*, use temp. array to compute vertical transport
334       in flux-form momentum pkg. => change results of few test-exp.
335      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
336                        lab_sea, natl_box & plume_on_slope
337    
338    checkpoint48
339    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
340    
341    checkpoint47j_post
342    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
343    o moved adexch from forward_step to addummy_in_stepping
344    o added exch in ctrl_map_...
345    o aveFreq.=0. at end of cost_final to avoid overwrite in
346      reverse checkpointing loop
347    o Yet more changes in gmredi:
348      * adgmredi_calc_tensor
349        avoiding all recomputation of gmredi_slope_limit
350      * adgmredi_x/y/rtransport
351        added flag for excessive storing to avoid recomp. of
352        u/v/rtans, dTdx/y/z
353        -> this is not really necessary and very memory-consuming
354      * adgmredi_slope_psi:
355        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
356      * gmredi_slope_limit
357        re-activated full calculation of taperfct for case 'ac02'
358    o updating verification/ adjoints of carbon, global_ocean.90x40x15
359    
360    checkpoint47i_post
361    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
362    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
363      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
364    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
365    o gmredi: fix few bugs.
366    
367    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
368    This will be a good checkpoint to plug into the ecco-branch.
369    o few modif.'s to get latest version adjointed
370      (mainly kick out code in ini_linear_phisurf)
371    o modif's to run adjoint with exactConserv
372    o case GM_BOLUS_ADVEC should be cleaned
373      S/R gmredi_slope_psi should be cleaned
374    o verification/carbon now has exactConserv=.TRUE.
375    
376    checkpoint47g_post
377    o time-average AIM output: becomes independent from statvars time-average
378      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
379    o After TAF bug fix:
380      Tested adjoint of gmredi package.
381      Tests were done with checkpoint47 rather than with latest
382      checkpoint47f_post since the latter is broken for the adjoint
383      verification/carbon/ contains both ADM and TLM gradient checks.
384    Here they are, before they get changed/lost/stolen.
385    Mostly modif.'s to fix numerical sensitivities.
386    Gradient checks OK for
387    - GM_taper_scheme:
388      * clipping
389      * ac02
390      * linear
391      * glw91
392      * dm95
393      * ldd97
394    - GMREDI_OPTIONS:
395      * GM_VISBECK_VARIABLE_K
396      * GM_NON_UNITY_DIAGONAL
397      * GM_EXTRA_DIAGONAL
398      * GM_BOLUS_ADVEC
399    in conjunction with data.gmredi parameters to be checked in
400    in a few minutes under verification/carbon/code/
401    
402    checkpoint47f_post
403    Merging from release1_p10:
404    o modifications for using pkg/exf with pkg/seaice
405      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
406        and SEAICE_EXTERNAL_FLUXES
407      - pkg/exf CPP options EXF_READ_EVAP and
408        EXF_NO_BULK_COMPUTATIONS
409      - usage examples are Experiments 8 and 9 in
410        verification/lab_sea/README
411      - verification/lab_sea default experiment now uses
412        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
413    
414    checkpoint47e_post
415    o created a tag prior to creating a branch
416    
417    checkpoint47d_post
418    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
419      at the bottom boundary had an erroneous half slip boundary condition
420    o added bottom drag and no slip boundary condition capabilities to
421      oceanic pressure coordinates code
422    o added new verification experiment global_ocean_pressure, this experiment is
423      also described in the tutorial section of the manual
424    checkpoint47d_pre
425    
426    checkpoint47c_post
427    o Added a verification experiment for a global cubed-sphere ocean run
428      -  verification/global_ocean.cubed32x32x30
429      -  uses pkg/therm_seaice and pkg/bulk_forcing
430    
431    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
432    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
433      when using P-coordinate; only implemented for atmospheric config.
434    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
435      NOTES: requires option NONLIN_FRSURF to be "#define".
436    o update advect_xz/results/output.txt (left from checkpoint44g_post)
437    
438    checkpoint47b_post
439    Merging from release1_p9:
440    o pkg/seaice
441      - removed GOTO's and added taf directives
442      - double precision constants to reduce the g77 (Linux)
443        to F77 (SGI) differences reported in release1_p8
444    o tools/genmake
445      - added SGI options
446    o verification/testscript
447      - updated to that of checkpoint47a_post
448    o verification/global_ocean.90x40x15/input/eedata
449      - modified for SGI f77 compatibility
450    o verification/lab_sea
451      - added description of sea-ice model
452      - added missing matlab routines
453      - added test of thermodynamics parallelization
454    
455    checkpoint47a_post
456    o new pkg: aim_v23
457     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
458       for now, keep the same surface forcing as before.
459     - Part-Cell implemented into AIM; check that Heat & Water are conserved
460     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
461     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
462    o add diagnostic of surface correction term in monitor output
463    
464    o bulk_force and therm_seaice
465    - Two packages:  bulk_force (Bulk forcing)
466      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
467    - Earlier integration from Stephaine Dutkiewicz
468      and Patrick Heimbach.
469    - Two ifdef statements for compile time,
470       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
471    
472    checkpoint47
473    differentiable version of checkpoint46n_post
474    o bug fix in quasihydrostaticterms
475    o * "clean" adjoint code (in terms of extensive recomputations)
476        can now be obtained for all GMREDI options (i.e. for
477        - GM_VISBECK_VARIABLE_K
478        - GM_NON_UNITY_DIAGONAL
479        - GM_EXTRA_DIAGONAL
480        - GM_BOLUS_ADVEC )
481      * However, wrong gradient check problem remains unsolved.
482      * New CPP options have been introduced for different
483        tapering schemes
484    o external_fields_load now part of differentiation list
485    o pressure needs multiple storing;
486      would be nice to have store_pressure at beginning or
487      end of forward_step, e.g. by having phiHyd global (5-dim.)
488      (NB: pressure is needed for certain cases in find_rho,
489      which is also invoked through convective_adjustment).
490    o recomputations in find_rho for cases
491     'JMD95'/'UNESCO' or 'MDJWF' are OK.
492    o #define ATMOSPHERIC_LOADING should be differentiable
493    o ini_forcing shifted to begining of initialise_varia
494    o Incorporating QNVS line search routines into MITgcm
495      (this is separate code, and therefore not under pkg)
496      lsopt/, optim/
497    o Updated verification/carbon/
498      - #define GM_VISBECK_VARIABLE_K
499      - GM_taper_scheme    = 'ldd97'    
500    
501    checkpoint46n_post
502    Merging from release1_p8:
503    o verification/natl_box:
504      updating new external_fields_load routine
505    o New package: pkg/seaice
506      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
507      The sea-ice code is based on Hibler (1979-1980).
508      Two sea-ice dynamic solvers, ADI and LSR, are included.
509      In addition to computing prognostic sea-ice variables and diagnosing
510      the forcing/external data fields that drive the ocean model,
511      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
512      The implied surface heat flux is then stored in variable
513      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
514      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
515      non-local transport term.  Because this call precedes model
516      thermodynamics, temperature under sea-ice may not be "exactly" at
517      the freezing point by the time theta is dumped or time-averaged.
518      N.B.: fairly large differences in accuracy occur across
519            different platforms/compilers; comparison between
520            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
521            generated output gives:
522       T           S           U           V
523      C D M    c        m  s        m  s        m  s        m  s
524      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
525      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
526      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
527    
528      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
529    o GAD:
530      - generated new common blocks to account for call of
531        same gad routines with differing traceridentities
532        (needed to modify tracerIdentity indices in GAD.h)
533      - generated separate common blocks for case useCubedSphereExchange
534        (Department of Futurology)
535      - parameter lists to gmredi_?transport: added tracerIdentity
536      - added new key indices to tamc.h
537    o external_fields_load:
538      - added this routine to TAF list
539      - needed to make some common blocks global and additional storing
540        along the same lines as exf package (checkpoint_lev?_directives.h)
541    o exf:
542      updated external forcing package
543      - bug fixes carried over from ecco-branch
544        (missing OBCS_OPTIONS.h in two routines)
545      - enable easy to use "no forcing".
546      - added exf I/O for atmospheric loading
547      - added exf I/O for runoff data
548      - transfered scaling between exf <-> MITgcm to exf namelist
549    o Adding new verification experiment global_with_exf.
550      This verification experiment is almost identical to the
551      global_ocean.90x40x15 experiment, except that it uses
552      the exf (and cal) package instead of the
553      external_fields_load routine (cf README file).
554    
555    checkpoint46m_post
556    o modified testscript to return -- when there are no lines of "%MON" output
557    o added new flag "quasiHydrostatic" for QH mode
558      and new routine quasihydrostaticterms()
559    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
560      New routine: mom_u_coriolis_nh()
561    o fixed sign of non-hydrostatic metric terms in u and v equations.
562      Depend on correct sign of gravitySign.
563    o added work.pc* to .cvsignore in aim directories using ifc
564    o introduced flag for controllin non-hydrostatic metric terms
565    o removed gravitySign from PARM04
566    o switched to g77/ifc from pgf77 in aim experiments
567    
568    checkpoint46l_post
569    o made convective adjustment work with pressure coordinates:
570     - changed the direction of k-loop in convective_adjustment.F for the
571       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
572     - adjusted the reference pressure k-index in convective_adjustment.F
573     - adjusted the convection condition in convect.F (in analogy to
574       calc_ivdc.F)
575     - convective_adjustment no longer computes anything on the halos
576     - removed the warnings about negative salinity from find_rho.F and
577       find_alpha.F; instead the new routine look_for_neg_salinity, called
578       at the beginning of find_rho, find_alpha, and find_beta, does a
579       check of the entire slice, if CPP-option
580       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
581    checkpoint46l_pre
582    
583    checkpoint46k_post
584    o fixed the verification/global_ocean.90x40x15 experiment:
585     - new bathymetry (the world according to A., JMC, and M.)
586     - new initial fields and forcing fields (*.bin files)
587     - new POLY3.COEFFS (for the next release one should switch to a full
588       equation of state: JMD95P or MDJWF)
589     - fixed several errors and redundancies in the data file
590     - experiment uses looped cells
591     - added matlab directory with diagnostic scripts for plotting of output
592    
593    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
594     - read AIM physics parameters from a file (data.aimphys)
595     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
596    
597    checkpoint46j_post
598    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
599    o move wVel computation at the end of the time step, in S/R integr_continuity
600    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
601    o update timeave pkg for wVel diagnostic.
602    checkpoint46j_pre
603    
604    checkpoint46i_post
605    o Clean up AIM package (and keep the results unchanged):
606      include CPP_OPTION and use IMPLICT NONE in all routines ;
607      declare all the variables _RL ; use _d 0 for all numerical constants.
608      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
609    
610    checkpoint46h_post
611    o cleaned up the use of rhoNil and rhoConst.
612      - rhoNil should only appear in the LINEAR equation of state, everywhere
613        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
614        and the dynamical equations are all divided by rhoConst
615    o introduced new parameter rhoConstFresh, a reference density of fresh
616      water, to remove the fresh water flux's dependence on rhoNil. The default
617      value is 999.8 kg/m^3
618    o cleanup up external_forcing.F and external_forcing_surf.F
619      - can now be used by both OCEANIC and OCEANICP
620    checkpoint46h_pre
621    
622     Added code to convert surface volume flux (fresh water) into
623     a mass flux when using P coordinates in the ocean (OCEANICP).
624     Note: It assumes you have set rho0=rhoConst=density of fresh water.
625    
626    checkpoint46g_post
627    o Include a new diagnostic variable phiHydLow for the ocean model
628      - in z-coordinates, it is the bottom pressure anomaly
629      - in p-coordinates, it is the sea surface elevation
630      - in both cases, these variable have global drift, reflecting the mass
631        drift in z-coordinates and the volume drift in p-coordinates
632      - included time averaging for phiHydLow, be aware of the drift!
633    o depth-dependent computation of Bo_surf for pressure coordinates
634      in the ocean (buoyancyRelation='OCEANICP')
635      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
636        Theta, Salinity, and Pressure in the parameter list. This routine is
637        presently contained in find_rho.F. This routine does not give the
638        correct density for 'POLY3', which would be a z-dependent reference
639        density.
640    o cleaned up find_rho
641      - removed obsolete 'eqn' from the parameter list.
642    o added two new verification experiments: gop and goz
643      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
644    checkpoint46g_pre
645    
646    checkpoint46f_post
647    o Enable tangent linear (forward mode) gradient checks:
648      - extended active file handling to g_... files
649      - added TANGENT_SIMULATION to theSimulationMode
650      - extended grdchk package accordingly
651    o added tangent linear setup in verification/carbon/code_ftl
652    o added adjoint setup in verification/front_relax/code_ad
653    
654    checkpoint46e_post
655    o Added new equation of state -> MDJWF
656      - EOS of McDougall et al., 2002, JAOT, submitted
657      - caveat: the equation of state is only valid for a smaller (more
658        realistic?) range of values than JMD95P/Z and UNESCO
659      - added masks to the calculation of pressure in store_pressure
660      - added more check values for density in check_eos (ini_eos.F), some of
661        the old check values are out of the range of the MDJWF-eos, so don't
662        expect perfect matches for those
663    checkpoint46e_pre
664    
665    checkpoint46d_post
666    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
667      'OCEANICP', also initialised field pressure correctly in ini_eos in the
668      case of pressure coordinates. eosType='JMD95Z' in
669      combination with buoyancyRelation='OCEANICP' now causes an error.
670    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
671      in find_alpha/beta.
672    checkpoint46d_pre
673    
674    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
675      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
676    
677    checkpoint46c_post
678    o Changes necessary for ocean in p-coordinates
679     -  Added new buoyancy relation = 'OCEANICP'
680     -  Added new parameters = gravitySign (this used to be contained inside
681        the factor dRdZ which I added when we first switched to R coordinates).
682     X GM/Redi is not compatible (yet)
683     X bottom drag and no-slip need to be debugged.
684    checkpoint46c_pre
685    
686    checkpoint46b_post
687    o Added new equation of state -> JMD95Z and JMD95P
688      - EOS of Jackett and McDougall, 1995, JAOT
689      - moved all EOS parameters into EOS.h
690      - new routines ini_eos.F, store_pressure.F
691    o Added UNESCO EOS, but not recommended because it requires
692      in-situ temperature (see JMD95)
693    o Modified formatting for knudsen2.f in utils/knudsen2 and added
694      unesco.f to be used with POLY3
695    checkpoint46b_pre
696    
697    checkpoint46a_post
698    o Added (atmospheric) pressure loading
699      - new field in FFIELDS.h, etc...
700      - new cpp flag ATMOSPHERIC_LOADING
701    o Changed hFacC to _hFacC in calc_phi_hyd.F
702    o Added SHORTWAVE_HEATING to some files for consistency
703    checkpoint46a_pre
704    
705    checkpoint46
706    further merges from release1_p5
707    o new ctrl package
708      - adopted from ECCO environment to enable optimization
709      - added Eliassen Palm fluxes to controls
710    o added Eliassen Palm flux controls to gradient check package
711    o cost package
712      - Compatible with new ctrl package
713      - added Eliassen Palm cost hooks
714      - modif's of existing cost functions
715    o Adjoint-related bug fixes in kpp:
716      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
717      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
718    o autodiff package
719      - flow directives:
720        + new for S/R do_the_model_io
721        + enhanced for S/R checkpoint
722        + new gmredi.flow
723      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
724        disable adcommon.h/g_common.h by default.
725      - fixed problem for adjoint of global_max
726    o modified verification/carbon/
727    o New setup for adjoint of global_ocean
728    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
729    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
730    o incorporated hooks for sponge layer code (external_forcing.F)
731    
732    checkpoint45d_post
733    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
734    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
735      (affects plume_on_slope "cg2d" output)
736    o add new parameter deltaTfreesurf for free-surface time stepping
737    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
738    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
739    o change phiMin in exp1 (to agree with documentation)
740    o add new flags:
741     - T,S forcing inside/outside Adams-Bashforth
742     - turn off temp,salt advection and/or forcing
743     - for each tracer, define internal flag for multiDimAdvection & A-B
744    o monitor: change definition of KE to check conservation of Energy
745    
746    checkpoint45c_post
747    o Removed f90 comments ("!")
748    o Modified initialisations to enable exf package for MITgcm
749      (without invoking ECCO_PACKAGE).
750    o modifications to gradient check package (Martin Losch)
751      - enable centered differences
752      - modified format of standard output
753    
754    checkpoint45b_post
755    o cleaned exchange calls in cg2d
756    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
757    o included CPP option SINGLE_LAYER_MODE in thermodynamics
758      to configure barotropic setup (Martin Losch)
759    o moved some initialisations within bi,bj loop in dynamics
760      (TAF flow dependency)
761    o in initialise_varia, moved call packages_init_variables
762      before convective_adjustment_init
763      (corresponding adjustment of TAF tape initialisation).
764    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
765    
766    checkpoint45a_post
767    o compute Rho over the whole domain (extend iMin,jMin indices)
768    o specific exchange for X-slice domain (case Ny=1)
769    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
770    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
771    
772    checkpoint44h_post = checkpoint45
773    o Fix to restore differentiability:
774      place at which packages_init_variables is called in
775      initialise_varia is crucial for reverse control flow.
776    o modifications in GMRedi to enable stable adjoint
777      (corresponding modif's in thermodynamics, dynamics)
778    o added missing hook for sponge layer code in external_forcing
779    o modified test cost functions
780    o storing in gad_advection (plus removal of write(0,*)!
781    o missing headers TR1.h added in convective_adjustment routines
782    o errorMessageUnit set non-equal zero in eeboot
783      (conflict on some platforms, e.g. IBM SP3)
784    o modified carbon verif.
785    
786    checkpoint44h_pre
787    o vertical grid option: allow to put the Interface at the middle between
788      2 cell-centers ; replace delZ in pkg/kpp by drF.
789    o GM Advective form: Tracers are advected using the residual transport (=
790      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
791    
792    checkpoint44g_post
793    o fix surface correction term in multiDimAdvection (affects plume_on_slope
794      results) ; ifdef missing in thermodynamics.F
795    
796    checkpoint44f_pre,checkpoint44f_post
797    o added PTRACERS package
798      This allows an arbitrary number of passive tracers to be integrated
799      forward simultaneously with the dynamicaly model.
800      + Implemented so far:
801        - basic forward algorithm (time-stepping, advection, diffusion, convection)
802        - I/O and checkpointing
803        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
804      + Not implemented so far:
805        - KPP
806        - OBCS
807      + No specific example supplied (yet) but global_ocean.90x40x15 has the
808        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
809        line in data.pkg.
810      + This package is disabled by default since it increases storage.
811    
812    
813    o testscript: added -cleanup option
814    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
815                 b) enable to filter 2D fields.
816    
817    checkpoint44e_pre,post
818    o re-wrote convective adjustment to use pre-calculated weights
819      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
820      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
821      Original calls to convect() still in place.
822    
823    chkpt44d_pre,post
824    o added missing EXCLUDE_MONITOR flags
825    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
826      (incompatible typ in MIN/MAX expressions caused problems
827      on IBM SP3)
828    o in genmake added variable MAKEDEPEND
829      plus resetting for case SunOS
830    o added timer_stats.c routine for IBM SP3
831    o removed variables in dynamics
832    !!! I forgot to create tag chkpt44d_pre !!!
833    !!! But chkpt44d_pre = chkpt44c_post    !!!
834    
835    o real fresh water flux implemented with non-linear free-surface.
836    
837    chkpt44c_pre,post
838    o few fix (mask in shap_s2, EmPmR in external_field_load,
839      USE_NATURAL_BCS in solve_for_P);
840    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
841    
842    checkpoint44b_pre/_post
843    o merge of relevant stuff from the ecco-branch:
844      - genmake: removed $S64 overwrite for case SunOS
845      - pkg/exf: update and corrections for field swapping and obcs
846      - pkg/ecco: parameter lists for the_model_main, the_main_loop
847                  harmonized between ECCO and MITgcm
848      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
849                      updated checkpointing_lev... lists for obcs
850      - model/src: minor changes in forward_step, plot_field
851                   added directive for divided adjoint in the_main_loop
852      - pkg/mdsio: added mdsio_gl_slice
853    
854    o check parameters & config (chkpt44a_pre,post)
855    o OBC and NonLin_FrSurf.
856    
857    checkpoint44
858    o fix bug in mom_vi_del2uv
859    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
860    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
861    o update AIM experiments (NCEP input files)
862    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
863    o added some stuff for AD
864    
865    checkpoint43
866    o added two new advection tests
867    o added global 4x4 degree ocean test
868    o added test of H&S94 with free surface on cube
869    o some final mods for gradient check, adjoint,...
870    
871    checkpoint42
872      Fixed AD-related problems:
873    o Store directives up-to-date with re-arranged Adams-Bashforth
874      (mainly thermodynamics.F)
875    o New store directives for multi-dim. advection schemes
876      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
877      * new common block and key passkey
878      (mainly gad_advection.F)
879    o Modified store directives for split of dynamics/thermodynamics
880      for the case ALLOW_KPP
881    o Cleaned argument list for timestep_tracer.F
882    
883    checkpoint41
884    o re-formatted/added comments in prologues of key subroutines
885      to work with protex
886    
887    checkpoint40
888    o moved calc_gs, calc_gt and calc_tr1 back to model/src
889    o added FLT (floats) package from Arne along with demo. experiment
890    o re-arranged Adams-Bashforth scheme for tracers to allow easier
891      implementation of forward-in-time forcing terms
892    o more mods for non-linear free-surface including new variable
893    o modified multi-dim method to work on cube
894    o bug fix in KPP (from DM)
895    
896    checkpoint40pre9
897    o added DST advection schemes
898    o fix MPI bug on SGI's
899    o modifications for non-linear free-surface
900    o fixed conditionals for fixed flow/passive tracer only mode
901    o added tension/strain form of stress tensor
902    o changes to commenting of arguments for TAF/TAMC
903    o added/updated many matlab scripts
904    o added multi-dimensional advection method for tracers
905      
906    checkpoint40pre8
907    o new package rw/
908      Added method for dumping intermediate local arrays:
909      mdsio_writetile - same as mdsio_writefield except works from inside
910                        bi,bj loop
911      mdsio_writelocal - same as mdsio_writetile except works for local
912                         arrays
913      write_local_r? - higher-level wrapper for mdsio_writelocal
914      Controlled by diagFreq. Defaults to zero (ie. no dumps)
915      Example given at end of mom_vecinv.F that dumps some local arrays.
916    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
917      control flux-form versus vector invariant code.
918      Switch is runtime flag vectorInvariantMomentum (defaults to false)
919      or genmake -DISABLE ...
920    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
921      (additional storing is now needed for case vecinv;
922      currently nothing implemented to switch this storing off
923      in case fluxform is used since no CPP flag available).
924    
925    checkpoint40pre7
926    o bug fix in dynamics.F
927      calc_viscosity called before k=1,Nr loop.
928    o added some #ifdef's ALLOW_PASSIVE_TRACER
929    o cleaned initialisations in ctrl_map_ini
930      related to TAF
931    
932    checkpoint40pre6
933    o split dynamics into thermodynamics & dynamics
934    o corresponding split of calc_diffusivity into
935      calc_diffusivity, calc_viscosity
936      (kpp_calc_diff, kpp_calc_visc).
937    o Added diffkr, kapgm to control variables
938    o bug fix in gmredi_slope_limit for ldd97
939    
940    checkpoint40pre5
941    o proper initialization of Adams-Bashforth time stepping
942      + uses forward step for very first step of model (iter=0)
943    o re-generated *all* output since almost all output is modified by this
944      change (sorry but we've been putting this one off for about 2 years)
945      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
946        *not* regenerated since they are already out of date and I don't
947        want to create the impression that they are suddenly working.
948    o removed KAP stuff for DEC's
949    o modified/added many .cvsignore files in */code and */input
950    o added new expt "solid-body.cs-32x32x1"
951      + this uses an alternative form of ini_curvilinear_grid.F which
952        is not necessarily any better than the current one...
953    
954    checkpoint40pre4
955    o added re-initialisations of utrans,vtrans,rtrans in
956      calc_common_factors which are crucial for TAF.
957    o extended iMin,jMin range for calc_common_factors,
958      calc_diffusivity
959    o added option ALLOW_PASSIVE_TRACER
960    o a few minor updates and fixes
961    
962    checkpoint40pre3
963    o created calc_gtr1.F for gad package
964    o split the_main_loop and re-introduced forward_step
965    o some recomputations of nIter0 for TAMC
966    
967    checkpoint40pre2
968    o Updated to latest branch of AJA, JMC
969    o Added gradient check package
970    o Added routines for passive tracer handling
971    o Added carbon sequestration sensitivity experiment
972    
973    checkpoint39
974     o Modifications and fixes to support TAMC
975       (mainly missing or wrong directives)
976     o Corrected common blocks when fooling TAMC to produce adjoint I/O
977       in addummy_in_stepping
978     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
979     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
980     o Included following packages:
981       cal: calendar
982       exf: external forcing
983       ecco: essential routines to control use of cal, exf
984             (NB: this is not the full ECCO environment)
985     o disabled some packages by default in genmake
986    
987    checkpoint38
988     o see notes_c37_adj.txt
989     o corrected wrong layer index in external_forcing_t
990     o replaced the_main_loop/forward_step by the_main_loop
991     o removed forceoutput from write_state
992       (replaced criteria for initial/final state)
993     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
994    
995    checkpoint37
996     o mdsio.F routine split and packaged in pkg/mdsio
997       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
998        used unless genmake -disable=mdsio)
999     o allow a more precise surface-geopotential gradient for the atmosphere
1000       taking into account the change in space of Alpha (=1/rho) at the surface.
1001     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1002       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1003     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1004       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1005       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1006     o Time-Average diagnostics defined as a pseudo package "timeave".
1007     o pickup files : old pickup (before c35) did not work with new code (c35
1008       and after) unless activating 2 commented lines in initialise-varia.
1009     o Non-Hydrostatic pickup file Pb fixed.
1010     o bug with Rigid-lid version (since c35) fixed.  
1011    
1012    checkpoint36
1013     o implement Crank-Nickelson barotropic time-stepping
1014     o recover Time-Average diagnostics
1015     o fix Pb in checkpoint (PR#19)
1016     o AIM become a standard package ; clean unused CPP_kees
1017    
1018    checkpoint35
1019     o subtantial rewrite of dynamics.f
1020     o allows staggered time-stepping
1021     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1022     o added bottom drag (linear + quadratic)
1023    
1024    checkpoint34
1025     o Modified exchange routines for correct reverse simulation.
1026     o Added verification output to comply with bug fix in impldiff.F
1027       as of c33 (exp2, natl_box).
1028     o Corrected store directives in dynamics.F
1029     o Corrected array boundaries in impldiff.F
1030     o Corrected array dimensions in gmredi.
1031       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1032     o Added routine GLOBAL_SUM_INT to global_sum.F
1033     o Added mdsio_gl.F for ECCO purposes.
1034    
1035    checkpoint33
1036     o Fixed bug in lower BC in impldiff.F
1037     o Fixed confusion about units of forcing arrays in FFIELDS.h
1038       namely Fu,Fv,Qnet,Qsw,EmPmR:
1039       - Removed verification/natl_box/code/external_fields_scale.F
1040         (did not differ from that in model/src)
1041       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1042         (see FFIELDS.h for description)
1043       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1044         kpp_calc.F and kpp_transport_t.F
1045       - Removed model/src/external_fields_scale.F and calls to it
1046       - verification/natl_box uses flux data with "atmospheric" sign so
1047         a special version of external_fields_load.F is used to
1048         change the data as it's read in. This way, the arrays
1049         have the right units and signs at all times tha a user could
1050         possibly use them.
1051     o Corrected genmake to delete a temporary file during configuration
1052    
1053    checkpoint32
1054     o Scaling of forcing fields moved from external_forcing.F to
1055       external_fields_scale.F, called directly after loading fields.
1056     o Surface relaxation terms added to surface tendency fields in
1057       extra subroutine.
1058     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1059       fields.
1060     o Changes in GMRedi to comply with packaging structure.
1061     o Modifications and bug fixes in KPP package.
1062     o Verification experiment for KPP added (verification/nat_box/)
1063    
1064    checkpoint31
1065     o Packages interface brought in line with defined standard
1066       -> new routines packages_...F
1067       -> changes in initialise_fixed.F, initialise_varia.F
1068       -> enables initialisation interface for ECCO package
1069     o Rescaling of external forcing fields immediately after read
1070       (removed from external_forcing.F)
1071       -> new: surface_fields_scale.F
1072       -> affects ini_foorcing.F, external_fields_load.F
1073     o Computation of surface tendencies before tendency updates.
1074       -> new: external_forcing_surf.F
1075     o Change of variable names useGMRedi, useKPP, useECCO
1076     o Further changes in dynamics.F, impldiff.F for TAMC
1077     o Tested for experiments 0, 2, 4.
1078       - not yet tested for GMRedi.
1079       - not yet tested for KPP.
1080    
1081    checkpoint30
1082     o Updates for OBCs
1083     o New experiment for test OBCs (internal_wave)
1084     o New output.txt in verification/exp4/results/
1085     o Updates for KPP: calculation of viscosity corrected, new variables
1086       kpp_dumpFreq and kpp_taveFreq
1087     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1088       and entry for T90 in genmake
1089    
1090    checkpoint29
1091     o packaged KPP and GM/Redi
1092    
1093    checkpoint28
1094     o Corrected initialization of hFacMin for difference vertical coordinates
1095     o Modified calculation of partial cell thickness to more robust algorithm
1096     o config_summary.F: replaced write_1D_... by write_0D_...
1097       read_write.F: added subroutines write_0D_...
1098     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1099       included some initialisations required for TAMC.
1100     o routine calc_isoslopes: modified sqrt computation to make it
1101       differentiable for zero argument.
1102     o routines dynamics, impldiff:
1103       included store directives and tape key computations required for TAMC.
1104     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1105    
1106    checkpoint27
1107     o fixed calc_isoslopes() to so that cancellation of terms in tensor
1108       formulation works properly with variable resolution.
1109     o restructured the calling tree between the_model_main() and dynamics()
1110     o split initialise() into initialise_fixed() and initialise_varia()
1111     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
1112       in new routine ini_psurf()
1113    
1114    checkpoint26
1115     o moved some #ifdef in optional routines to encompass everything
1116       except the argument declarations. This was using up some memory.
1117     o fixed macros like _ADT to work with both versions of Linux cpp
1118     o cleaned up some unused and uninitialized variables
1119       (helps when debugging with strict compile options)
1120     o split up CPP_EEOPTIONS.h into options and macros
1121       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1122     o patch for 2 processor JAM mode
1123    
1124    checkpoint25
1125     o updates for OBCs and NH
1126     o dramatically reduced memory usage
1127     o added "JAM" routines for use on Artic network
1128     o parameterization of convection by implicit vertical diffusion
1129     o added a diagnostic of convective index
1130     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1131       (this is was partly for OBCs and NH but also in anticipation of
1132        an explicit free-surface option)
1133     o initial state input files for U and V
1134    
1135    checkpoint24
1136     o Removed some spurious "REAL"s
1137     o Updated KPP to latest version from JPL
1138     o Added a COS(latitude) in horizontal viscosity
1139    
1140    checkpoint23
1141     o Added del^4 diffusion for salt and temperature
1142     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1143    
1144    checkpoint22
1145     o Made many small changes: implicit none, format(i5), etc...
1146     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1147    
1148    checkpoint21
1149     o Introduced new I/O package that supports direct-access records (mdsio.F)
1150     o Split-up mid-level I/O routines
1151     o Updated input data for experiments 0,1,2,4 and 5
1152     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1153    
1154    checkpoint20
1155     o Tidied up open-boundaries some more
1156     o Added non-hydrostatic code
1157     o Fixed some input data
1158     o Modified MPI start-up to work in "coupled" context.
1159    
1160    checkpoint19
1161     o Tidied up directory structure for verification experiments.
1162     o Added new code for open boundaries.
1163     o Corrected advective terms near boundaries.
1164     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1165     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1166     o Split default parameters out of ini_parms.F into set_defaults.F.
1167    
1168    checkpoint18
1169     o Further changes for optional code generation with
1170       CPP - ugh!
1171    
1172    checkpoint17
1173     o Beginning to incorporating modularity
1174       for supporting atmos. and ocean configs.
1175     o Small changes for TAMC complinace
1176     o New ultra simple test case. Barotropic box
1177       configuration "exp0".
1178    
1179    checkpoint16
1180     o Minor changes to exchange routines to support
1181       accumulation in reverse mode. Adjoint of an
1182       assignment is an addition.
1183     o Changes to support compilation by TAMC (LR(1)
1184       syntax) and by g77 under Linux ( 72 character
1185       limit ).
1186    
1187    checkpoint15
1188     Rewrote exchange routines to allow
1189     o General tile <-> tile connectivity.
1190     o TAMC reverse mode flag ( is this really needed? )
1191     o Variable width overlap and exchange region widths.
1192     o Hooks for sharing data via DMA, Arctic, Memory Channel,
1193       shmput/shmget, VIA, SYSV shmem and every other cool
1194       communication method.
1195    
1196    checkpoint14
1197     Consistent isomorphism chages made. These allow dynamical core
1198     to support both pressure and meters as a vertical coordinate.
1199    
1200    checkpoint13
1201     Release which corrects global_max problem and a couple
1202     of KGM time-averaging diagnostic errors. Also contains
1203     a double-gyre experiment setup as well as the baseline
1204     4 degree global template. The double gyre template is
1205     organised to allow it to be applied automatically to
1206     the baseline configuration.
1207    
1208    branch-point-rdot
1209     A few tidy-ups have been made bt the real point of this
1210     check-point (excuse the pun) is to allow a branch to be
1211     made for the purposes of adding the rDot alterations.
1212     I don't want to commit the rDot to the main-trunk until
1213     we've actually tested it...
1214    
1215    checkpoint12
1216     Tidy up and added generic genmake script (formerly
1217     configure script).
1218     Released to testers.
1219    
1220    checkpoint11
1221     Re-arranged initialise() and introduced ini_vertical_grid()
1222     and ini_masks_etc().
1223    
1224  checkpoint10  checkpoint10
1225   Introduced the configure script.   Introduced the configure script.
1226   Separated out the diags package.   Separated out the diags package.

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