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revision 1.13 by cnh, Wed Sep 9 15:24:19 1998 UTC revision 1.167 by heimbach, Tue Jun 24 18:27:09 2003 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint51
7    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
8      - autodiff, ctrl, exf, grdchk, seaice
9      kept separate packages
10      - cost, ecco, obcs
11    o updating verification/internal_wave, verification/lab_sea
12      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
13    
14    checkpoint50i_post
15    o Preparing next differentiable checkpoint and sync
16      of MAIN vs. ecco-branch
17      - 1st step: this one is differentiable
18      - 2nd step: next(! not this) checkpoint will have updated packages
19                  from ecco-branch)
20    
21    checkpoint50h_post
22    o new package "land": provide surface BC for AIM.
23    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
24    o AIM: use true log-P extrapolation for near surface temp (= as in
25        F.Molteni paper) ; update aim.5l_cs output.
26    o New variable in PARM03 for more flexible pickups
27    o somewhat cleaned package initialisation sequence for
28      ctrl/ cost/ ecco/ in packages_... routines
29    
30    checkpoint50g_post
31    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
32      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
33      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
34        made the default because of faster convergence than ADI
35    
36    checkpoint50f_post
37    o exf totally restructured
38      - replaced all exf_set_ routines by one generic exf_set_gen.F
39        and made sure it's still differentiable
40      - split exf_getffields.F into new exf_bulkformulae.F
41      - exf_inscal_/exf_outscal_ suffixes consistent with field names
42      - updated adjoint/makefile and relevant verif. accordingly
43    
44    checkpoint50f_pre
45     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
46          + change Evap over land. (update aim.5l_cs output)
47     o added missing .cvsignores and made uniform across expts
48     o changed configuration of tidal_basin_2d expt
49     o added pkg/debug functions for tracing code in fatal crashes
50     o tidied pkg/monitor to use MONITOR_OPTIONS.h
51     o new fn in pkg/monitor to stop model if solution grows too big
52     o removed lots of single quotes from comments
53    
54    checkpoint50e_post
55    o make KPP work with PTRACERS
56     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
57       nearly a copy of kpp_transport_s
58     - there is no analogue to SurfaceTendencyS, so I have to use
59       gPtr(of the surface layer) instead
60    o add a new platform SunFire+mpi (SunFire 15000) to genmake
61    checkpoint50e_pre
62    
63    checkpoint50d_post
64    o change kpp output from multiple-record state files to single-record state
65      files analogous to write_state.F
66    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
67      analogous to the cg2d-related output.
68    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
69      so that writing to internal file fn (with length 512) fails.
70    checkpoint50d_pre
71    
72    checkpoint50c_post
73    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
74    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
75    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
76    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
77    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
78    
79    checkpoint50c_pre
80    Merging from release1_p13:
81    o bug fix for pkg/seaice dynamic solver
82    o Added SEAICE_initialHEFF to pkg/seaice
83    
84    checkpoint50b_post
85    o store u*,v* in gU,V instead of in guNm1,gvNm1
86    o in order to put the momForcing out of the Adams-Bashforth:
87      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
88      to timestep.F
89    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
90    o re-generate output for highly sensitive test-exp:
91       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
92    
93    checkpoint50b_pre
94    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
95    o corrected CPP option mismatch in exf_Bulk... functions for case
96      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
97    
98    checkpoint50a_post
99    o Bug fix for merging between c50 and KPP.
100      ikey was passed from thermodynamics to kpp_calc via
101      common block rather than being recomputed in kpp_calc,
102      in contradiction with new key itdkey.
103      New key ikppkey created, and tamc.h headers updated.
104    
105    checkpoint50
106    - 2nd step of merge with ecco-branch:
107      merge changes in ecco-branch back into main trunk
108    - bug fix in find_alpha
109    - more storing in gmredi_calc_tensor.F, kpp_routines.F
110    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
111    - merged some sliced AD support routines
112    
113    checkpoint49
114    merged from ecco-branch:
115    o exf:
116      - Enable initialisation of forcing fields to constant
117        (runtime) values.
118      - in exf_getffields.F
119        Reduce i-/j-loop to interior domain, discarding overlaps.
120        That also fixes wrong TAF-key computations for key_1, key_2
121        with bulf formulae.
122      - exf_init.F modify #ifdef for exf_init_evap
123      - exf_getffieldrec.F, ctrl_getrec.F
124        The following INT-usages are not safe:
125          fldsecs  = int(fldsecs/fldperiod)*fldperiod
126          fldcount = int(fldsecs/fldperiod) + 1
127        and were modified.
128    o autodiff: checkpoint_lev...
129      - updated storing for bulk formulae (some arrays were missing)
130      - added state for seaice package
131      - synchronized with main branch
132    o DIVA:
133      Modif.s in
134      - the_main_loop.F
135      - the_model_main.F
136      and added cost_final_restore.F cost_final_store.F
137      o With these changes, it is possible to fully separate
138        the first forward run to compute the cost function (mdthe_main_loop)
139        and adjoint runs over individual DIVA intervals (adthe_main_loop)
140        into separate model executions.
141        This enables better tuning of DIVA to given queue sizes.
142      o Loss of cost function value in consecutive DIVA runs is
143        fixed by storing to 'costfinal' file.
144      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
145        beginning/end of adjoint integration is accounted for.
146      The current changes apply to TAF-1.4.26.
147      TAF has one remaining bug, requiring one manual change
148      (see MITgcm manual).
149    o cal: synchronized between MAIN and ecco-branch
150    
151    checkpoint48i_post
152    o Changes to restore differentiability of code w.r.t. previous tag
153      (mostly adding new routines to make list and replacing
154      pressure by totPhiHyd).
155    o Updated and merged grdchk package
156      - has both ADM and TLM checks
157      - works for single- and multi-proc.
158      - output cleaned
159      - worked successfully for parallel DIVA
160    o genmake:
161      - Adding -platform=SP4
162      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
163    o Modif. for DIVA:
164      ctrl_unpack should not be called in intermediate DIVA interval.
165      (similar thing would apply for active files such as
166      tbar, sbar, psbar, which should not be reinitialised;
167      only relevant for ecco-branch)
168    
169    checkpoint48h_post
170    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
171    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
172    o Added SEAICE_initialHEFF to pkg/seaice
173    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
174    
175    checkpoint48g_post
176    --- EOS:
177    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
178      store total Potential in totPhyHyd for diagnostics & EOS.
179    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
180    --- Pressure/geopotential gradient:
181    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
182    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
183      ( changes results of global_ocean_pressure )
184    o NLFS + z-coord.: add eta*Rho' contribution.
185    o accurate phiHyd when using interface-W at the middle between 2 centers
186     ( changes results of ideal_2D_oce )
187    o includes r* 2nd term in potential gradient.
188    
189    checkpoint48f_post
190    Merging from release1_p12:
191    o Modifications for using pkg/exf with pkg/seaice
192      - improved description of the various forcing configurations
193      - added basic radiation bulk formulae to pkg/exf
194      - units/sign fix for evap computation in exf_getffields.F
195      - updated verification/global_with_exf/results/output.txt
196    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
197      (SBO) core products, including oceanic mass, center-of-mass,
198      angular, and bottom pressure (see pkg/sbo/README.sbo).
199    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
200      to avoid negative values in shallow regions.
201      - updated verification/natl_box/results/output.txt
202      - updated verification/lab_sea/results/output.txt
203    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
204    o Added useSingleCpuIO option (see PARAMS.h).
205    o Updated useSingleCpuIO option in mdsio_writefield.F to
206      work with multi-field files, e.g., for single-file pickup.
207    o pkg/seaice:
208      - bug fix in growth.F: QNET for no shortwave case
209      - added HeffFile for specifying initial sea-ice thickness
210      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
211    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
212      kpp_transport_t.F, forward_step.F, and the_main_loop.F
213    o pkg/seaice:
214      - adjoint-friendly modifications
215      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
216    
217    checkpoint48e_post
218    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
219    o dynamics: change definition of computational domain & adapt mom_fluxform
220      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
221    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
222        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
223        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
224        global_ocean.90x40x15 global_with_exf global_ocean_pressure
225        inverted_barometer solid-body.cs-32x32x1
226      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
227    
228    checkpoint48d_post
229    o in preparation for r*:
230     a) use pre-computed gradient of hydrostatic potential:
231        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
232     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
233        => affects results of glob_oce_pressure (different truncation error)  
234      update output.txt of ideal_2D_oce & global_ocean_pressure
235    
236    checkpoint48d_pre
237    o in preparation for r*:
238      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
239      pass the 2 comp. of the grad. as arguments to momentum S/R.
240      but for the moment, only used if it does not change the results.
241    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
242    
243    checkpoint48c_post
244    Modifications in treatment of initial flux forcing controls
245    to avoid extra storing of flux fields.
246    
247    checkpoint48c_pre
248    o Added tidal_basin_2d experiment (currently 1D!)
249    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
250    
251    checkpoint48b_post
252    o r* coordinate added in #ifdef NONLIN_FRSURF block.
253     (modification to pressure gradient not yet implemented)
254    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
255      (for U & V) that are used for vertical advection of momentum.
256    
257    checkpoint48a_post
258    o In preparation for r*, use temp. array to compute vertical transport
259       in flux-form momentum pkg. => change results of few test-exp.
260      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
261                        lab_sea, natl_box & plume_on_slope
262    
263    checkpoint48
264    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
265    
266    checkpoint47j_post
267    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
268    o moved adexch from forward_step to addummy_in_stepping
269    o added exch in ctrl_map_...
270    o aveFreq.=0. at end of cost_final to avoid overwrite in
271      reverse checkpointing loop
272    o Yet more changes in gmredi:
273      * adgmredi_calc_tensor
274        avoiding all recomputation of gmredi_slope_limit
275      * adgmredi_x/y/rtransport
276        added flag for excessive storing to avoid recomp. of
277        u/v/rtans, dTdx/y/z
278        -> this is not really necessary and very memory-consuming
279      * adgmredi_slope_psi:
280        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
281      * gmredi_slope_limit
282        re-activated full calculation of taperfct for case 'ac02'
283    o updating verification/ adjoints of carbon, global_ocean.90x40x15
284    
285    checkpoint47i_post
286    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
287    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
288      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
289    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
290    o gmredi: fix few bugs.
291    
292    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
293    This will be a good checkpoint to plug into the ecco-branch.
294    o few modif.'s to get latest version adjointed
295      (mainly kick out code in ini_linear_phisurf)
296    o modif's to run adjoint with exactConserv
297    o case GM_BOLUS_ADVEC should be cleaned
298      S/R gmredi_slope_psi should be cleaned
299    o verification/carbon now has exactConserv=.TRUE.
300    
301    checkpoint47g_post
302    o time-average AIM output: becomes independent from statvars time-average
303      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
304    o After TAF bug fix:
305      Tested adjoint of gmredi package.
306      Tests were done with checkpoint47 rather than with latest
307      checkpoint47f_post since the latter is broken for the adjoint
308      verification/carbon/ contains both ADM and TLM gradient checks.
309    Here they are, before they get changed/lost/stolen.
310    Mostly modif.'s to fix numerical sensitivities.
311    Gradient checks OK for
312    - GM_taper_scheme:
313      * clipping
314      * ac02
315      * linear
316      * glw91
317      * dm95
318      * ldd97
319    - GMREDI_OPTIONS:
320      * GM_VISBECK_VARIABLE_K
321      * GM_NON_UNITY_DIAGONAL
322      * GM_EXTRA_DIAGONAL
323      * GM_BOLUS_ADVEC
324    in conjunction with data.gmredi parameters to be checked in
325    in a few minutes under verification/carbon/code/
326    
327    checkpoint47f_post
328    Merging from release1_p10:
329    o modifications for using pkg/exf with pkg/seaice
330      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
331        and SEAICE_EXTERNAL_FLUXES
332      - pkg/exf CPP options EXF_READ_EVAP and
333        EXF_NO_BULK_COMPUTATIONS
334      - usage examples are Experiments 8 and 9 in
335        verification/lab_sea/README
336      - verification/lab_sea default experiment now uses
337        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
338    
339    checkpoint47e_post
340    o created a tag prior to creating a branch
341    
342    checkpoint47d_post
343    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
344      at the bottom boundary had an erroneous half slip boundary condition
345    o added bottom drag and no slip boundary condition capabilities to
346      oceanic pressure coordinates code
347    o added new verification experiment global_ocean_pressure, this experiment is
348      also described in the tutorial section of the manual
349    checkpoint47d_pre
350    
351    checkpoint47c_post
352    o Added a verification experiment for a global cubed-sphere ocean run
353      -  verification/global_ocean.cubed32x32x30
354      -  uses pkg/therm_seaice and pkg/bulk_forcing
355    
356    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
357    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
358      when using P-coordinate; only implemented for atmospheric config.
359    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
360      NOTES: requires option NONLIN_FRSURF to be "#define".
361    o update advect_xz/results/output.txt (left from checkpoint44g_post)
362    
363    checkpoint47b_post
364    Merging from release1_p9:
365    o pkg/seaice
366      - removed GOTO's and added taf directives
367      - double precision constants to reduce the g77 (Linux)
368        to F77 (SGI) differences reported in release1_p8
369    o tools/genmake
370      - added SGI options
371    o verification/testscript
372      - updated to that of checkpoint47a_post
373    o verification/global_ocean.90x40x15/input/eedata
374      - modified for SGI f77 compatibility
375    o verification/lab_sea
376      - added description of sea-ice model
377      - added missing matlab routines
378      - added test of thermodynamics parallelization
379    
380    checkpoint47a_post
381    o new pkg: aim_v23
382     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
383       for now, keep the same surface forcing as before.
384     - Part-Cell implemented into AIM; check that Heat & Water are conserved
385     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
386     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
387    o add diagnostic of surface correction term in monitor output
388    
389    o bulk_force and therm_seaice
390    - Two packages:  bulk_force (Bulk forcing)
391      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
392    - Earlier integration from Stephaine Dutkiewicz
393      and Patrick Heimbach.
394    - Two ifdef statements for compile time,
395       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
396    
397    checkpoint47
398    differentiable version of checkpoint46n_post
399    o bug fix in quasihydrostaticterms
400    o * "clean" adjoint code (in terms of extensive recomputations)
401        can now be obtained for all GMREDI options (i.e. for
402        - GM_VISBECK_VARIABLE_K
403        - GM_NON_UNITY_DIAGONAL
404        - GM_EXTRA_DIAGONAL
405        - GM_BOLUS_ADVEC )
406      * However, wrong gradient check problem remains unsolved.
407      * New CPP options have been introduced for different
408        tapering schemes
409    o external_fields_load now part of differentiation list
410    o pressure needs multiple storing;
411      would be nice to have store_pressure at beginning or
412      end of forward_step, e.g. by having phiHyd global (5-dim.)
413      (NB: pressure is needed for certain cases in find_rho,
414      which is also invoked through convective_adjustment).
415    o recomputations in find_rho for cases
416     'JMD95'/'UNESCO' or 'MDJWF' are OK.
417    o #define ATMOSPHERIC_LOADING should be differentiable
418    o ini_forcing shifted to begining of initialise_varia
419    o Incorporating QNVS line search routines into MITgcm
420      (this is separate code, and therefore not under pkg)
421      lsopt/, optim/
422    o Updated verification/carbon/
423      - #define GM_VISBECK_VARIABLE_K
424      - GM_taper_scheme    = 'ldd97'    
425    
426    checkpoint46n_post
427    Merging from release1_p8:
428    o verification/natl_box:
429      updating new external_fields_load routine
430    o New package: pkg/seaice
431      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
432      The sea-ice code is based on Hibler (1979-1980).
433      Two sea-ice dynamic solvers, ADI and LSR, are included.
434      In addition to computing prognostic sea-ice variables and diagnosing
435      the forcing/external data fields that drive the ocean model,
436      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
437      The implied surface heat flux is then stored in variable
438      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
439      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
440      non-local transport term.  Because this call precedes model
441      thermodynamics, temperature under sea-ice may not be "exactly" at
442      the freezing point by the time theta is dumped or time-averaged.
443      N.B.: fairly large differences in accuracy occur across
444            different platforms/compilers; comparison between
445            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
446            generated output gives:
447       T           S           U           V
448      C D M    c        m  s        m  s        m  s        m  s
449      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
450      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
451      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
452    
453      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
454    o GAD:
455      - generated new common blocks to account for call of
456        same gad routines with differing traceridentities
457        (needed to modify tracerIdentity indices in GAD.h)
458      - generated separate common blocks for case useCubedSphereExchange
459        (Department of Futurology)
460      - parameter lists to gmredi_?transport: added tracerIdentity
461      - added new key indices to tamc.h
462    o external_fields_load:
463      - added this routine to TAF list
464      - needed to make some common blocks global and additional storing
465        along the same lines as exf package (checkpoint_lev?_directives.h)
466    o exf:
467      updated external forcing package
468      - bug fixes carried over from ecco-branch
469        (missing OBCS_OPTIONS.h in two routines)
470      - enable easy to use "no forcing".
471      - added exf I/O for atmospheric loading
472      - added exf I/O for runoff data
473      - transfered scaling between exf <-> MITgcm to exf namelist
474    o Adding new verification experiment global_with_exf.
475      This verification experiment is almost identical to the
476      global_ocean.90x40x15 experiment, except that it uses
477      the exf (and cal) package instead of the
478      external_fields_load routine (cf README file).
479    
480    checkpoint46m_post
481    o modified testscript to return -- when there are no lines of "%MON" output
482    o added new flag "quasiHydrostatic" for QH mode
483      and new routine quasihydrostaticterms()
484    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
485      New routine: mom_u_coriolis_nh()
486    o fixed sign of non-hydrostatic metric terms in u and v equations.
487      Depend on correct sign of gravitySign.
488    o added work.pc* to .cvsignore in aim directories using ifc
489    o introduced flag for controllin non-hydrostatic metric terms
490    o removed gravitySign from PARM04
491    o switched to g77/ifc from pgf77 in aim experiments
492    
493    checkpoint46l_post
494    o made convective adjustment work with pressure coordinates:
495     - changed the direction of k-loop in convective_adjustment.F for the
496       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
497     - adjusted the reference pressure k-index in convective_adjustment.F
498     - adjusted the convection condition in convect.F (in analogy to
499       calc_ivdc.F)
500     - convective_adjustment no longer computes anything on the halos
501     - removed the warnings about negative salinity from find_rho.F and
502       find_alpha.F; instead the new routine look_for_neg_salinity, called
503       at the beginning of find_rho, find_alpha, and find_beta, does a
504       check of the entire slice, if CPP-option
505       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
506    checkpoint46l_pre
507    
508    checkpoint46k_post
509    o fixed the verification/global_ocean.90x40x15 experiment:
510     - new bathymetry (the world according to A., JMC, and M.)
511     - new initial fields and forcing fields (*.bin files)
512     - new POLY3.COEFFS (for the next release one should switch to a full
513       equation of state: JMD95P or MDJWF)
514     - fixed several errors and redundancies in the data file
515     - experiment uses looped cells
516     - added matlab directory with diagnostic scripts for plotting of output
517    
518    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
519     - read AIM physics parameters from a file (data.aimphys)
520     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
521    
522    checkpoint46j_post
523    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
524    o move wVel computation at the end of the time step, in S/R integr_continuity
525    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
526    o update timeave pkg for wVel diagnostic.
527    checkpoint46j_pre
528    
529    checkpoint46i_post
530    o Clean up AIM package (and keep the results unchanged):
531      include CPP_OPTION and use IMPLICT NONE in all routines ;
532      declare all the variables _RL ; use _d 0 for all numerical constants.
533      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
534    
535    checkpoint46h_post
536    o cleaned up the use of rhoNil and rhoConst.
537      - rhoNil should only appear in the LINEAR equation of state, everywhere
538        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
539        and the dynamical equations are all divided by rhoConst
540    o introduced new parameter rhoConstFresh, a reference density of fresh
541      water, to remove the fresh water flux's dependence on rhoNil. The default
542      value is 999.8 kg/m^3
543    o cleanup up external_forcing.F and external_forcing_surf.F
544      - can now be used by both OCEANIC and OCEANICP
545    checkpoint46h_pre
546    
547     Added code to convert surface volume flux (fresh water) into
548     a mass flux when using P coordinates in the ocean (OCEANICP).
549     Note: It assumes you have set rho0=rhoConst=density of fresh water.
550    
551    checkpoint46g_post
552    o Include a new diagnostic variable phiHydLow for the ocean model
553      - in z-coordinates, it is the bottom pressure anomaly
554      - in p-coordinates, it is the sea surface elevation
555      - in both cases, these variable have global drift, reflecting the mass
556        drift in z-coordinates and the volume drift in p-coordinates
557      - included time averaging for phiHydLow, be aware of the drift!
558    o depth-dependent computation of Bo_surf for pressure coordinates
559      in the ocean (buoyancyRelation='OCEANICP')
560      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
561        Theta, Salinity, and Pressure in the parameter list. This routine is
562        presently contained in find_rho.F. This routine does not give the
563        correct density for 'POLY3', which would be a z-dependent reference
564        density.
565    o cleaned up find_rho
566      - removed obsolete 'eqn' from the parameter list.
567    o added two new verification experiments: gop and goz
568      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
569    checkpoint46g_pre
570    
571    checkpoint46f_post
572    o Enable tangent linear (forward mode) gradient checks:
573      - extended active file handling to g_... files
574      - added TANGENT_SIMULATION to theSimulationMode
575      - extended grdchk package accordingly
576    o added tangent linear setup in verification/carbon/code_ftl
577    o added adjoint setup in verification/front_relax/code_ad
578    
579    checkpoint46e_post
580    o Added new equation of state -> MDJWF
581      - EOS of McDougall et al., 2002, JAOT, submitted
582      - caveat: the equation of state is only valid for a smaller (more
583        realistic?) range of values than JMD95P/Z and UNESCO
584      - added masks to the calculation of pressure in store_pressure
585      - added more check values for density in check_eos (ini_eos.F), some of
586        the old check values are out of the range of the MDJWF-eos, so don't
587        expect perfect matches for those
588    checkpoint46e_pre
589    
590    checkpoint46d_post
591    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
592      'OCEANICP', also initialised field pressure correctly in ini_eos in the
593      case of pressure coordinates. eosType='JMD95Z' in
594      combination with buoyancyRelation='OCEANICP' now causes an error.
595    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
596      in find_alpha/beta.
597    checkpoint46d_pre
598    
599    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
600      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
601    
602    checkpoint46c_post
603    o Changes necessary for ocean in p-coordinates
604     -  Added new buoyancy relation = 'OCEANICP'
605     -  Added new parameters = gravitySign (this used to be contained inside
606        the factor dRdZ which I added when we first switched to R coordinates).
607     X GM/Redi is not compatible (yet)
608     X bottom drag and no-slip need to be debugged.
609    checkpoint46c_pre
610    
611    checkpoint46b_post
612    o Added new equation of state -> JMD95Z and JMD95P
613      - EOS of Jackett and McDougall, 1995, JAOT
614      - moved all EOS parameters into EOS.h
615      - new routines ini_eos.F, store_pressure.F
616    o Added UNESCO EOS, but not recommended because it requires
617      in-situ temperature (see JMD95)
618    o Modified formatting for knudsen2.f in utils/knudsen2 and added
619      unesco.f to be used with POLY3
620    checkpoint46b_pre
621    
622    checkpoint46a_post
623    o Added (atmospheric) pressure loading
624      - new field in FFIELDS.h, etc...
625      - new cpp flag ATMOSPHERIC_LOADING
626    o Changed hFacC to _hFacC in calc_phi_hyd.F
627    o Added SHORTWAVE_HEATING to some files for consistency
628    checkpoint46a_pre
629    
630    checkpoint46
631    further merges from release1_p5
632    o new ctrl package
633      - adopted from ECCO environment to enable optimization
634      - added Eliassen Palm fluxes to controls
635    o added Eliassen Palm flux controls to gradient check package
636    o cost package
637      - Compatible with new ctrl package
638      - added Eliassen Palm cost hooks
639      - modif's of existing cost functions
640    o Adjoint-related bug fixes in kpp:
641      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
642      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
643    o autodiff package
644      - flow directives:
645        + new for S/R do_the_model_io
646        + enhanced for S/R checkpoint
647        + new gmredi.flow
648      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
649        disable adcommon.h/g_common.h by default.
650      - fixed problem for adjoint of global_max
651    o modified verification/carbon/
652    o New setup for adjoint of global_ocean
653    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
654    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
655    o incorporated hooks for sponge layer code (external_forcing.F)
656    
657    checkpoint45d_post
658    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
659    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
660      (affects plume_on_slope "cg2d" output)
661    o add new parameter deltaTfreesurf for free-surface time stepping
662    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
663    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
664    o change phiMin in exp1 (to agree with documentation)
665    o add new flags:
666     - T,S forcing inside/outside Adams-Bashforth
667     - turn off temp,salt advection and/or forcing
668     - for each tracer, define internal flag for multiDimAdvection & A-B
669    o monitor: change definition of KE to check conservation of Energy
670    
671    checkpoint45c_post
672    o Removed f90 comments ("!")
673    o Modified initialisations to enable exf package for MITgcm
674      (without invoking ECCO_PACKAGE).
675    o modifications to gradient check package (Martin Losch)
676      - enable centered differences
677      - modified format of standard output
678    
679    checkpoint45b_post
680    o cleaned exchange calls in cg2d
681    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
682    o included CPP option SINGLE_LAYER_MODE in thermodynamics
683      to configure barotropic setup (Martin Losch)
684    o moved some initialisations within bi,bj loop in dynamics
685      (TAF flow dependency)
686    o in initialise_varia, moved call packages_init_variables
687      before convective_adjustment_init
688      (corresponding adjustment of TAF tape initialisation).
689    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
690    
691    checkpoint45a_post
692    o compute Rho over the whole domain (extend iMin,jMin indices)
693    o specific exchange for X-slice domain (case Ny=1)
694    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
695    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
696    
697    checkpoint44h_post = checkpoint45
698    o Fix to restore differentiability:
699      place at which packages_init_variables is called in
700      initialise_varia is crucial for reverse control flow.
701    o modifications in GMRedi to enable stable adjoint
702      (corresponding modif's in thermodynamics, dynamics)
703    o added missing hook for sponge layer code in external_forcing
704    o modified test cost functions
705    o storing in gad_advection (plus removal of write(0,*)!
706    o missing headers TR1.h added in convective_adjustment routines
707    o errorMessageUnit set non-equal zero in eeboot
708      (conflict on some platforms, e.g. IBM SP3)
709    o modified carbon verif.
710    
711    checkpoint44h_pre
712    o vertical grid option: allow to put the Interface at the middle between
713      2 cell-centers ; replace delZ in pkg/kpp by drF.
714    o GM Advective form: Tracers are advected using the residual transport (=
715      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
716    
717    checkpoint44g_post
718    o fix surface correction term in multiDimAdvection (affects plume_on_slope
719      results) ; ifdef missing in thermodynamics.F
720    
721    checkpoint44f_pre,checkpoint44f_post
722    o added PTRACERS package
723      This allows an arbitrary number of passive tracers to be integrated
724      forward simultaneously with the dynamicaly model.
725      + Implemented so far:
726        - basic forward algorithm (time-stepping, advection, diffusion, convection)
727        - I/O and checkpointing
728        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
729      + Not implemented so far:
730        - KPP
731        - OBCS
732      + No specific example supplied (yet) but global_ocean.90x40x15 has the
733        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
734        line in data.pkg.
735      + This package is disabled by default since it increases storage.
736    
737    
738    o testscript: added -cleanup option
739    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
740                 b) enable to filter 2D fields.
741    
742    checkpoint44e_pre,post
743    o re-wrote convective adjustment to use pre-calculated weights
744      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
745      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
746      Original calls to convect() still in place.
747    
748    chkpt44d_pre,post
749    o added missing EXCLUDE_MONITOR flags
750    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
751      (incompatible typ in MIN/MAX expressions caused problems
752      on IBM SP3)
753    o in genmake added variable MAKEDEPEND
754      plus resetting for case SunOS
755    o added timer_stats.c routine for IBM SP3
756    o removed variables in dynamics
757    !!! I forgot to create tag chkpt44d_pre !!!
758    !!! But chkpt44d_pre = chkpt44c_post    !!!
759    
760    o real fresh water flux implemented with non-linear free-surface.
761    
762    chkpt44c_pre,post
763    o few fix (mask in shap_s2, EmPmR in external_field_load,
764      USE_NATURAL_BCS in solve_for_P);
765    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
766    
767    checkpoint44b_pre/_post
768    o merge of relevant stuff from the ecco-branch:
769      - genmake: removed $S64 overwrite for case SunOS
770      - pkg/exf: update and corrections for field swapping and obcs
771      - pkg/ecco: parameter lists for the_model_main, the_main_loop
772                  harmonized between ECCO and MITgcm
773      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
774                      updated checkpointing_lev... lists for obcs
775      - model/src: minor changes in forward_step, plot_field
776                   added directive for divided adjoint in the_main_loop
777      - pkg/mdsio: added mdsio_gl_slice
778    
779    o check parameters & config (chkpt44a_pre,post)
780    o OBC and NonLin_FrSurf.
781    
782    checkpoint44
783    o fix bug in mom_vi_del2uv
784    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
785    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
786    o update AIM experiments (NCEP input files)
787    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
788    o added some stuff for AD
789    
790    checkpoint43
791    o added two new advection tests
792    o added global 4x4 degree ocean test
793    o added test of H&S94 with free surface on cube
794    o some final mods for gradient check, adjoint,...
795    
796    checkpoint42
797      Fixed AD-related problems:
798    o Store directives up-to-date with re-arranged Adams-Bashforth
799      (mainly thermodynamics.F)
800    o New store directives for multi-dim. advection schemes
801      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
802      * new common block and key passkey
803      (mainly gad_advection.F)
804    o Modified store directives for split of dynamics/thermodynamics
805      for the case ALLOW_KPP
806    o Cleaned argument list for timestep_tracer.F
807    
808    checkpoint41
809    o re-formatted/added comments in prologues of key subroutines
810      to work with protex
811    
812    checkpoint40
813    o moved calc_gs, calc_gt and calc_tr1 back to model/src
814    o added FLT (floats) package from Arne along with demo. experiment
815    o re-arranged Adams-Bashforth scheme for tracers to allow easier
816      implementation of forward-in-time forcing terms
817    o more mods for non-linear free-surface including new variable
818    o modified multi-dim method to work on cube
819    o bug fix in KPP (from DM)
820    
821    checkpoint40pre9
822    o added DST advection schemes
823    o fix MPI bug on SGI's
824    o modifications for non-linear free-surface
825    o fixed conditionals for fixed flow/passive tracer only mode
826    o added tension/strain form of stress tensor
827    o changes to commenting of arguments for TAF/TAMC
828    o added/updated many matlab scripts
829    o added multi-dimensional advection method for tracers
830      
831    checkpoint40pre8
832    o new package rw/
833      Added method for dumping intermediate local arrays:
834      mdsio_writetile - same as mdsio_writefield except works from inside
835                        bi,bj loop
836      mdsio_writelocal - same as mdsio_writetile except works for local
837                         arrays
838      write_local_r? - higher-level wrapper for mdsio_writelocal
839      Controlled by diagFreq. Defaults to zero (ie. no dumps)
840      Example given at end of mom_vecinv.F that dumps some local arrays.
841    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
842      control flux-form versus vector invariant code.
843      Switch is runtime flag vectorInvariantMomentum (defaults to false)
844      or genmake -DISABLE ...
845    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
846      (additional storing is now needed for case vecinv;
847      currently nothing implemented to switch this storing off
848      in case fluxform is used since no CPP flag available).
849    
850    checkpoint40pre7
851    o bug fix in dynamics.F
852      calc_viscosity called before k=1,Nr loop.
853    o added some #ifdef's ALLOW_PASSIVE_TRACER
854    o cleaned initialisations in ctrl_map_ini
855      related to TAF
856    
857    checkpoint40pre6
858    o split dynamics into thermodynamics & dynamics
859    o corresponding split of calc_diffusivity into
860      calc_diffusivity, calc_viscosity
861      (kpp_calc_diff, kpp_calc_visc).
862    o Added diffkr, kapgm to control variables
863    o bug fix in gmredi_slope_limit for ldd97
864    
865    checkpoint40pre5
866    o proper initialization of Adams-Bashforth time stepping
867      + uses forward step for very first step of model (iter=0)
868    o re-generated *all* output since almost all output is modified by this
869      change (sorry but we've been putting this one off for about 2 years)
870      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
871        *not* regenerated since they are already out of date and I don't
872        want to create the impression that they are suddenly working.
873    o removed KAP stuff for DEC's
874    o modified/added many .cvsignore files in */code and */input
875    o added new expt "solid-body.cs-32x32x1"
876      + this uses an alternative form of ini_curvilinear_grid.F which
877        is not necessarily any better than the current one...
878    
879    checkpoint40pre4
880    o added re-initialisations of utrans,vtrans,rtrans in
881      calc_common_factors which are crucial for TAF.
882    o extended iMin,jMin range for calc_common_factors,
883      calc_diffusivity
884    o added option ALLOW_PASSIVE_TRACER
885    o a few minor updates and fixes
886    
887    checkpoint40pre3
888    o created calc_gtr1.F for gad package
889    o split the_main_loop and re-introduced forward_step
890    o some recomputations of nIter0 for TAMC
891    
892    checkpoint40pre2
893    o Updated to latest branch of AJA, JMC
894    o Added gradient check package
895    o Added routines for passive tracer handling
896    o Added carbon sequestration sensitivity experiment
897    
898    checkpoint39
899     o Modifications and fixes to support TAMC
900       (mainly missing or wrong directives)
901     o Corrected common blocks when fooling TAMC to produce adjoint I/O
902       in addummy_in_stepping
903     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
904     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
905     o Included following packages:
906       cal: calendar
907       exf: external forcing
908       ecco: essential routines to control use of cal, exf
909             (NB: this is not the full ECCO environment)
910     o disabled some packages by default in genmake
911    
912    checkpoint38
913     o see notes_c37_adj.txt
914     o corrected wrong layer index in external_forcing_t
915     o replaced the_main_loop/forward_step by the_main_loop
916     o removed forceoutput from write_state
917       (replaced criteria for initial/final state)
918     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
919    
920    checkpoint37
921     o mdsio.F routine split and packaged in pkg/mdsio
922       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
923        used unless genmake -disable=mdsio)
924     o allow a more precise surface-geopotential gradient for the atmosphere
925       taking into account the change in space of Alpha (=1/rho) at the surface.
926     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
927       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
928     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
929       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
930       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
931     o Time-Average diagnostics defined as a pseudo package "timeave".
932     o pickup files : old pickup (before c35) did not work with new code (c35
933       and after) unless activating 2 commented lines in initialise-varia.
934     o Non-Hydrostatic pickup file Pb fixed.
935     o bug with Rigid-lid version (since c35) fixed.  
936    
937    checkpoint36
938     o implement Crank-Nickelson barotropic time-stepping
939     o recover Time-Average diagnostics
940     o fix Pb in checkpoint (PR#19)
941     o AIM become a standard package ; clean unused CPP_kees
942    
943    checkpoint35
944     o subtantial rewrite of dynamics.f
945     o allows staggered time-stepping
946     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
947     o added bottom drag (linear + quadratic)
948    
949    checkpoint34
950     o Modified exchange routines for correct reverse simulation.
951     o Added verification output to comply with bug fix in impldiff.F
952       as of c33 (exp2, natl_box).
953     o Corrected store directives in dynamics.F
954     o Corrected array boundaries in impldiff.F
955     o Corrected array dimensions in gmredi.
956       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
957     o Added routine GLOBAL_SUM_INT to global_sum.F
958     o Added mdsio_gl.F for ECCO purposes.
959    
960    checkpoint33
961     o Fixed bug in lower BC in impldiff.F
962     o Fixed confusion about units of forcing arrays in FFIELDS.h
963       namely Fu,Fv,Qnet,Qsw,EmPmR:
964       - Removed verification/natl_box/code/external_fields_scale.F
965         (did not differ from that in model/src)
966       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
967         (see FFIELDS.h for description)
968       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
969         kpp_calc.F and kpp_transport_t.F
970       - Removed model/src/external_fields_scale.F and calls to it
971       - verification/natl_box uses flux data with "atmospheric" sign so
972         a special version of external_fields_load.F is used to
973         change the data as it's read in. This way, the arrays
974         have the right units and signs at all times tha a user could
975         possibly use them.
976     o Corrected genmake to delete a temporary file during configuration
977    
978    checkpoint32
979     o Scaling of forcing fields moved from external_forcing.F to
980       external_fields_scale.F, called directly after loading fields.
981     o Surface relaxation terms added to surface tendency fields in
982       extra subroutine.
983     o impldiff.F changed to avoid storing by TAMC of huge intermediate
984       fields.
985     o Changes in GMRedi to comply with packaging structure.
986     o Modifications and bug fixes in KPP package.
987     o Verification experiment for KPP added (verification/nat_box/)
988    
989    checkpoint31
990     o Packages interface brought in line with defined standard
991       -> new routines packages_...F
992       -> changes in initialise_fixed.F, initialise_varia.F
993       -> enables initialisation interface for ECCO package
994     o Rescaling of external forcing fields immediately after read
995       (removed from external_forcing.F)
996       -> new: surface_fields_scale.F
997       -> affects ini_foorcing.F, external_fields_load.F
998     o Computation of surface tendencies before tendency updates.
999       -> new: external_forcing_surf.F
1000     o Change of variable names useGMRedi, useKPP, useECCO
1001     o Further changes in dynamics.F, impldiff.F for TAMC
1002     o Tested for experiments 0, 2, 4.
1003       - not yet tested for GMRedi.
1004       - not yet tested for KPP.
1005    
1006    checkpoint30
1007     o Updates for OBCs
1008     o New experiment for test OBCs (internal_wave)
1009     o New output.txt in verification/exp4/results/
1010     o Updates for KPP: calculation of viscosity corrected, new variables
1011       kpp_dumpFreq and kpp_taveFreq
1012     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1013       and entry for T90 in genmake
1014    
1015    checkpoint29
1016     o packaged KPP and GM/Redi
1017    
1018    checkpoint28
1019     o Corrected initialization of hFacMin for difference vertical coordinates
1020     o Modified calculation of partial cell thickness to more robust algorithm
1021     o config_summary.F: replaced write_1D_... by write_0D_...
1022       read_write.F: added subroutines write_0D_...
1023     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1024       included some initialisations required for TAMC.
1025     o routine calc_isoslopes: modified sqrt computation to make it
1026       differentiable for zero argument.
1027     o routines dynamics, impldiff:
1028       included store directives and tape key computations required for TAMC.
1029     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1030    
1031    checkpoint27
1032     o fixed calc_isoslopes() to so that cancellation of terms in tensor
1033       formulation works properly with variable resolution.
1034     o restructured the calling tree between the_model_main() and dynamics()
1035     o split initialise() into initialise_fixed() and initialise_varia()
1036     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
1037       in new routine ini_psurf()
1038    
1039    checkpoint26
1040     o moved some #ifdef in optional routines to encompass everything
1041       except the argument declarations. This was using up some memory.
1042     o fixed macros like _ADT to work with both versions of Linux cpp
1043     o cleaned up some unused and uninitialized variables
1044       (helps when debugging with strict compile options)
1045     o split up CPP_EEOPTIONS.h into options and macros
1046       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1047     o patch for 2 processor JAM mode
1048    
1049    checkpoint25
1050     o updates for OBCs and NH
1051     o dramatically reduced memory usage
1052     o added "JAM" routines for use on Artic network
1053     o parameterization of convection by implicit vertical diffusion
1054     o added a diagnostic of convective index
1055     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1056       (this is was partly for OBCs and NH but also in anticipation of
1057        an explicit free-surface option)
1058     o initial state input files for U and V
1059    
1060    checkpoint24
1061     o Removed some spurious "REAL"s
1062     o Updated KPP to latest version from JPL
1063     o Added a COS(latitude) in horizontal viscosity
1064    
1065    checkpoint23
1066     o Added del^4 diffusion for salt and temperature
1067     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1068    
1069    checkpoint22
1070     o Made many small changes: implicit none, format(i5), etc...
1071     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1072    
1073    checkpoint21
1074     o Introduced new I/O package that supports direct-access records (mdsio.F)
1075     o Split-up mid-level I/O routines
1076     o Updated input data for experiments 0,1,2,4 and 5
1077     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1078    
1079    checkpoint20
1080     o Tidied up open-boundaries some more
1081     o Added non-hydrostatic code
1082     o Fixed some input data
1083     o Modified MPI start-up to work in "coupled" context.
1084    
1085    checkpoint19
1086     o Tidied up directory structure for verification experiments.
1087     o Added new code for open boundaries.
1088     o Corrected advective terms near boundaries.
1089     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1090     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1091     o Split default parameters out of ini_parms.F into set_defaults.F.
1092    
1093    checkpoint18
1094     o Further changes for optional code generation with
1095       CPP - ugh!
1096    
1097    checkpoint17
1098     o Beginning to incorporating modularity
1099       for supporting atmos. and ocean configs.
1100     o Small changes for TAMC complinace
1101     o New ultra simple test case. Barotropic box
1102       configuration "exp0".
1103    
1104    checkpoint16
1105     o Minor changes to exchange routines to support
1106       accumulation in reverse mode. Adjoint of an
1107       assignment is an addition.
1108     o Changes to support compilation by TAMC (LR(1)
1109       syntax) and by g77 under Linux ( 72 character
1110       limit ).
1111    
1112    checkpoint15
1113     Rewrote exchange routines to allow
1114     o General tile <-> tile connectivity.
1115     o TAMC reverse mode flag ( is this really needed? )
1116     o Variable width overlap and exchange region widths.
1117     o Hooks for sharing data via DMA, Arctic, Memory Channel,
1118       shmput/shmget, VIA, SYSV shmem and every other cool
1119       communication method.
1120    
1121  checkpoint14  checkpoint14
1122   Consistent isomorphism chages made. These allow dynamical core   Consistent isomorphism chages made. These allow dynamical core
1123   to support both pressure and meters as a vertical coordinate.   to support both pressure and meters as a vertical coordinate.

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