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revision 1.13 by cnh, Wed Sep 9 15:24:19 1998 UTC revision 1.258 by heimbach, Mon Feb 23 19:20:16 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint52k_post
7    o removed top-level directory "diags"
8      - we migrated these functions to pkg/timeave a long time ago
9    o fixed bug introduced in pkg/monitor
10    o accuracy ctrlprec = 32 insuffient for gradient checks using
11      averaged fields (I/O via cost_averages)
12      -> use ctrl.h in active_file*.F to control I/O precision.
13    o paramter list of CALL ADTHE_MAIN_LOOP
14    o added initial do_the_model_io to ecco
15    o set all ...Freq to zero after cost_final
16      taveFreq, dumpFreq, pChkptFreq
17    o MAIN and ECCO differentiability restored
18    
19    checkpoint52j_post
20    o fix nchklev in tamc.h for global_ocean...
21    o Bringing flow and store directives up-to-date
22    o Really weird thing!
23      call do_the_model_io from the_main_loop with parameters
24      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
25      TAF places a faulty re-call of initialise_varia
26      after cost_final call which should not be there!
27    checkpoint52j_pre
28    
29    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
30      error messages
31    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
32    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
33      debug output
34    o modfied mdsio_writefield.F to handle non-global files under exch2
35    o update AIM Cubed-Sphere exp (aim.5l_cs):
36      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
37    o update AIM Equatorial Channel exp:
38      use standard aim_v23 pkg and change the SST fields to be more realistic.
39    o globalFile now works with exch2
40    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
41      mon_vort3.F to make exch2 friendly with >1 tile per cube face
42    o limit timeave output for hi-res integrations
43    
44    checkpoint52i_post
45    o removed CPP_EEOPTIONS.h from verification/*/code
46    o updated the tiling for global_ocean_pressure
47    checkpoint52i_pre
48    
49    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
50      the old pkg/aim).
51    
52    checkpoint52h_pre
53    o shortened offending lines in exch2_send_rx?.template
54    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
55    o genmake2: add build & execute test for NetCDF code
56    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
57      old grid files, moved CPP_EEMACROS.h to pkg/exch2
58    o added useSingleCPUIO flag to monitor.F and mon_out.F
59    o added temporary hack for sea-ice dynamics on the cube:
60      metric terms are ignored and it is assumed that
61      there is no sea-ice on cube faces 1, 2, 4, and 5.
62    
63    checkpoint52f_post
64    o added exch2 cube routines to pkg/exch2
65    o modified hs94.cs-32x32x5 to use it
66    o added new grid files to hs94.cs-32x32x5
67    checkpoint52f_pre
68    
69    checkpoint52e_post
70    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
71      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
72    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
73      to work with implicit vertical advection and AB ;
74    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
75    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
76     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
77    checkpoint52e_pre
78    
79    o fix bug in impldiff when Nr=1 or Nr=2.
80    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
81    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
82    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
83      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
84    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
85    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
86    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
87    
88    checkpoint52d_post
89    o re-tiled many expts to allow comparison in multi-processor mode
90      - updated output accordingly
91      - changed hs94.128x64x5 to use intial T from file rather than use the
92        random number generator
93    o add infrastructure in model routines for fizhi and gridalt packages
94    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
95    o changes to permit hi-res, cubed-sphere, configuration
96      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
97      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
98      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
99        of surface winds for the cube
100      (A verification experiment, based on global_ocean.cs32x15, but with
101       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
102       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
103       complete with example surface forcing files and matlab scripts to look
104       at the output and compare it with that of global_ocean.cs32x15.)
105    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
106       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
107       to conform to the common rule.
108    o check-in the first version of the coupler + interfaces for multi-components
109       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
110       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
111       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
112       - ocean and atmos. share the same horizontal grid (no interpolation).
113       - exchanges between component and coupler is done in forward_step
114    o new verification experiment, cpl_aim+ocn:
115       coupled ocean - AIM atmosphere on cs32 grid.
116    
117    checkpoint52d_pre
118    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
119    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
120    
121    checkpoint52c_post
122    o Fixing OPTIONS files for use of exf:
123      - ALLOW_ECCO not needed
124      - ECCO_CPPOPTIONS.h should not be included from
125        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
126        as has been the case in the past
127      - All cal/exf related options are currently set in
128        single header file. Should remain so until we
129        agree on a consistent new policy.
130    o Removed all CPP options for cal package.
131      cal has no more CPP options.
132    o modified STOREs in GAD_ADVECTION
133    o corrected key comp. for passkey
134    
135    checkpoint52b_post
136    o new version: "thsice" of thermodynamic sea-ice pkg:
137     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
138     - modify fluxes but do not change theta directly;
139     - light cleaning of bulk_force pkg (still needed with thsice).
140     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
141       + output_thsice.txt to test thsice & bulk_force pkgs.
142    o put back grid & coriolis monitor output.
143    checkpoint52b_pre
144    
145    o call "do_the_model_io" at the beginning (=> dump initial state)
146    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
147    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
148      (need info on NUMBER_OF_PTRACERS)
149    o missing PTRACERS headers in some routines
150    o default tamc.h in pkg/autodiff supposed to crash
151      to ensure proper customization
152    
153    checkpoint52a_post
154    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
155      - moved surfaceTendencyTice from pkg/seaice to main code
156      - subroutine FREEZE_SURFACE now limits only surface temperature
157        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
158        => new output.txt for global_ocean.cs32x15 & global_with_exf
159      - keep the old version of FREEZE for backward compatibility;
160        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
161      - corresponding modifs for TAF directives
162    o added surface flux output variables to TIMEAVE_STATVARS
163    o time-averaged output for pkg/ptracers
164    o fix problem with ECCO-related divided adjoint
165      snapshot file was missing some ad-variables,
166      but no warning issued by TAF
167    
168    checkpoint52a_pre
169    o some bug fixes for #undef REAL4_IS_SLOW
170    
171    checkpoint52 = ecco_c52_e35
172    o after testing adjoints of checkpoint51u_post
173    
174    checkpoint51u_post
175    o this is the post-merge tag of the ecco-branch
176      (needs another clean checkout and re-testing)
177    o various natl_box_adjoint configs and results
178      but no input fields
179    o obcs adjoint not yet merged!
180    o adding ECCO global 1x1 and 2x2 degree configs
181    o updated/extended some store directives for seaice
182    o pkg/ecco now containes ecco-specific part of cost function
183    o top level routines the_main_loop, forward_step
184      supersede those in model/src/
185      previous input data.cost now in data.ecco
186      (new namelist ecco_cost_nml)
187    o in ctrl/ cleaned some cross-dependencies and updated CPP options
188    
189    checkpoint51t_post
190    o this is the pre-merge tag of the ecco-branch
191    
192    checkpoint51s_post
193    o cleanup: removed various obsolete #define-s
194    o pkg/grdchk
195      - renamed 'ph-grd 3' to 'grad-res'
196      - merged from ecco-branch
197        (remaining bug fixes for obcs gradient checks)
198      - additional high-precision output for testreport
199        (grep for 'precision_grdchk_result')
200    
201    checkpoint51r_post
202    o cleaned up or removed CPP_OPTIONS.h files
203    o updated results for some of the tests to reflect the new
204      optfiles (-ieee: -O0 instead of -O3)
205    
206    checkpoint51q_post
207    o cd_code:
208      - moved cd_scheme.F -> cd_code_scheme.F
209      - separate read_checkpoint from cd_code_ini_vars.F
210      - separated cd_code part from write_checkpoint
211      - updated AD_SOURCE, generated .flow
212      - added CD_CODE_VARS.h to the_main_loop
213      - Moving cd_code specific store dir.s to pkg/cd_code
214    o ctrl package totally restructured
215      - pack/unpack now optional and decoupled from
216        xx_/adxx_ I/O
217      - ctrl_pack/unpack cleaned
218        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
219      - confined inclusion of AD_CONFIG.h to where necessary.
220    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
221    
222    checkpoint51p_post
223    o create initial cd_code package
224      - WARNING: the initialization of fields within packages
225        is broken because INI_FIELDS (where READ_CHECKPOINT is
226        called) is called *before* PACKAGES_INIT_VARIABLES.
227        This seems to be backwards since
228        1) its important to initially zero the entire field including
229           the "halo" region
230        2) zeroing needs to be done *before* reading pickup info
231           and the pickup call might or might not happen in any
232           particular run
233      - this needs an overhaul for R2
234    o cleanup verification/*/code/GMREDI_OPTIONS.h
235    o cleanup testreport
236    
237    checkpoint51o_post
238    o bringing AD-related verif's up to date with genmake2
239      - carbon/
240      - global_ocean.90x40x15/
241      - hs.94.1x64x5/
242      - (front_relax/ )
243    o (more) consistent directory structure for AD-related verif.'s
244    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
245    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
246    o bug fix in find_alpha.F for MDJWF:
247      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
248        change rho -> rho-rhoConst
249      - replace call find_rho to find_rhonum
250    o initialisation of rFlx extended to full array (required by TAF)
251      and shifted to thermodynamics
252    o removed PTRACERS.h in ptracers routine
253    o added surfacetendencyPtr to S/R parameter list pracers_forcing
254    o Correcting initialisations for fVerU, fVerV.
255    o helping TAF to recognize dependency on kUp for
256      fVerU, fVerV
257    o Replacing delZ by delR in pkg/ctrl/
258    checkpoint51o_pre
259    
260    o undid all of cp51 pending some cleanups and discussion
261    o added the [#include "AD_CONFIG.h"] statement to all files that need
262       it for adjoint/tl #defines
263     o re-worked the build logic in genmake2 to support AD_CONFIG.h
264     o removed tools/genmake since it no longer works
265    
266    checkpoint51n_post
267    o modifications to make FREEZE flux visible to pkg/kpp
268      - moved surfaceTendencyTice from pkg/seaice to main code
269      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
270      - subroutine FREEZE now limits only surface temperature
271        (this means new output.txt for global_ocean.90x40x15,
272         global_ocean.cs32x15, and global_with_exf)
273    o added surface flux output variables to TIMEAVE_STATVARS
274    
275    checkpoint51n_pre
276    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
277    o added [#include "AD_CONFIG.h"] to all files that use the following
278      defines:
279      - ALLOW_ADJOINT_RUN
280      - ALLOW_TANGENTLINEAR_RUN
281      - ALLOW_ECCO_OPTIMIZATION
282    
283    checkpoint51m_post
284    o incorporating changes to get TAMC/TAF working in genmake2
285      - added new TAMC/TAF targets to the Makefile
286      - various cleanups related to package handling
287      - these changes should have no impact on the forward model
288    
289    checkpoint51l_post
290    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
291     - faster algorithm for cal_addtime.F
292     - higher precision arithmetic, where needed
293     - pkg/exf *startdate variables changed from calendar date to
294       model integration time
295    
296    checkpoint51l_pre
297    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
298    o enable to apply restoring on S & T only in a latitude band.
299    o update output (external_forcing_surf modif. change truncation errors)
300       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
301    
302    checkpoint51k_post
303    o change default to: useNHMTerms=.FALSE.
304     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
305       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
306     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
307        exp1, ideal_2D_oce
308     - change data file of oceanic exp (leave the results unchanged for now)
309       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
310    o set gravitySign automatically according to the vertical coordinate used
311      (and change sign: back to "logical" value: +1 when R increases downward)
312    o added an include barrier to the default CPP_OPTIONS.h and
313      removed the #include "PACKAGES_CONFIG.h" from it
314    o fix a bug in mom_fluxform (from chk51j_post)
315    
316    checkpoint51j_post
317    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
318    o adjusted some flow directives (dynamics, thermodynamics)
319    o added cubed-sphere case to test cost function
320    o heckpoint_lev?_directives.h now include
321      pkg-specific directives, whenever those are enabled.
322    o Moving pkg-specific flow directives to corresponding pkg
323      Moving pkg-specific differentiation list to corresponding pkg
324      Moving pkg-specific checkpoint-lev storing to corresponding pkg
325      ---> conventions are
326           - pkg_ad.flow
327           - pkg_ad_diff.list
328           - pkg_ad_check_lev?_dir.h
329    
330    checkpoint51i_post
331    o merge of the branch-genmake2
332      - knowingly breaks the older genmake
333      - automatic generation of all ALLOW_${PKG_NAME} defines
334      - new testreport supersedes older testscript
335    o large number of package inclusion and header cleanups
336    checkpoint51i_pre
337    
338    o new output for adjoin of global ocean vector invariant
339    o fix for checkpoint of thermodynamic seaice and bulk_force
340    o Steph gchem various cleanups
341    
342    checkpoint 51h_pre
343    o fixed some single quotes
344    o modify gchem pkg to be more versatile
345    o modifications to clean up dic pkg
346    o add pkg/cfc
347    
348    checkpoint51g_post
349    o provide links for ARPACK and ADM*TLM
350    o start removing verification/vero/
351    o update AD-related stuff
352      (in particular some IF-statements in model/src/ routines)
353    o adding to verification/global_ocean.90x40x15/ adjoint of
354      vector invariant setup
355    
356    checkpoint51f_post
357    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
358    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
359      of tracer Green's fucntions for ocean inversion project.
360    
361    checkpoint51f_pre
362    o Added on-the-fly spatial interpolation capability
363        "USE_EXF_INTERPOLATION" to pkg/exf.
364      - This is a temporary Cartesian-grid hack until
365        the super-duper ESMF coupler becomes available.
366      - See verification/global_with_exf/README for usage example.
367      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
368        flags and modified pkg/seaice accordingly.
369    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
370        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
371        non-local transport term.
372    
373    checkpoint51e_post
374    o pkg/mom_vecinv:
375      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
376      - add time-ave diagnostic of vorticity advection.
377    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
378    o atmospheric geopotential: - include water vapor effect;
379                                - use p^kappa in p* scaling.
380    o land pkg: read initial state from files.
381    o AIM : add stratospheric drag in the upper level
382    
383    checkpoint51d_post
384    o change function ILNBLNK (=> last non-blank char.) to return zero
385      (instead of the string length) when the string. char is empty
386    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
387    o modif's to restore TAMC compatibility
388      - avoid "_d" constructs in PARAMETER declarations
389      - avoid interrupting lines by comment lines
390    o Use cluster local disks for purely local I/O
391      vs. globally visible disks needed for ctrl stuff
392      (merged from ecco-branch)
393      - new active_file_loc... and mdsio_..._loc routines
394      - affected packages: autodiff, ctrl, grdchk, mdsio
395    
396    checkpoint51c_post
397    o introducing integer flag debugLevel
398      - debLevZero: suppress all output
399      - debLevA: standard
400      - debLevB: equivalent to current debugMode=.TRUE.
401    o introducing pathname variable mdsioLocalDir for mdsio
402      that can be specified at runtime
403      (relevant for cluster I/O to local disk)
404    `
405    >>>checkpoint51b_post
406    adjoint of ptracers
407    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
408    o extended state in checkpoint_lev?, etc.
409    o alternative ctrl/cost with tr1 or ptracer
410    o new comlev1_bibj_ptracers
411    o new ptracers.flow
412    o made ptracers_forcing same as external_forcing_s
413    o added verification for adjoint with ptracers
414      - adm. grdchk fail so far
415      - tlm. grdchk OK
416      - checked tapelev/comlev recomputations: OK
417    <<<checkpoint51b_pre
418    
419    checkpoint51a_post
420    o added code for biogeochemistry package
421      - new pkgs: dic, gchem
422      - new subroutine in ptracers
423    o modify code for biogeo packages
424      - in model/src and pkg/ptracers
425    
426    checkpoint51
427    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
428      - autodiff, ctrl, exf, grdchk, seaice
429      kept separate packages
430      - cost, ecco, obcs
431    o updating verification/internal_wave, verification/lab_sea
432      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
433    
434    checkpoint50i_post
435    o Preparing next differentiable checkpoint and sync
436      of MAIN vs. ecco-branch
437      - 1st step: this one is differentiable
438      - 2nd step: next(! not this) checkpoint will have updated packages
439                  from ecco-branch)
440    
441    checkpoint50h_post
442    o new package "land": provide surface BC for AIM.
443    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
444    o AIM: use true log-P extrapolation for near surface temp (= as in
445        F.Molteni paper) ; update aim.5l_cs output.
446    o New variable in PARM03 for more flexible pickups
447    o somewhat cleaned package initialisation sequence for
448      ctrl/ cost/ ecco/ in packages_... routines
449    
450    checkpoint50g_post
451    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
452      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
453      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
454        made the default because of faster convergence than ADI
455    
456    checkpoint50f_post
457    o exf totally restructured
458      - replaced all exf_set_ routines by one generic exf_set_gen.F
459        and made sure it's still differentiable
460      - split exf_getffields.F into new exf_bulkformulae.F
461      - exf_inscal_/exf_outscal_ suffixes consistent with field names
462      - updated adjoint/makefile and relevant verif. accordingly
463    
464    checkpoint50f_pre
465     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
466          + change Evap over land. (update aim.5l_cs output)
467     o added missing .cvsignores and made uniform across expts
468     o changed configuration of tidal_basin_2d expt
469     o added pkg/debug functions for tracing code in fatal crashes
470     o tidied pkg/monitor to use MONITOR_OPTIONS.h
471     o new fn in pkg/monitor to stop model if solution grows too big
472     o removed lots of single quotes from comments
473    
474    checkpoint50e_post
475    o make KPP work with PTRACERS
476     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
477       nearly a copy of kpp_transport_s
478     - there is no analogue to SurfaceTendencyS, so I have to use
479       gPtr(of the surface layer) instead
480    o add a new platform SunFire+mpi (SunFire 15000) to genmake
481    checkpoint50e_pre
482    
483    checkpoint50d_post
484    o change kpp output from multiple-record state files to single-record state
485      files analogous to write_state.F
486    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
487      analogous to the cg2d-related output.
488    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
489      so that writing to internal file fn (with length 512) fails.
490    checkpoint50d_pre
491    
492    checkpoint50c_post
493    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
494    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
495    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
496    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
497    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
498    
499    checkpoint50c_pre
500    Merging from release1_p13:
501    o bug fix for pkg/seaice dynamic solver
502    o Added SEAICE_initialHEFF to pkg/seaice
503    
504    checkpoint50b_post
505    o store u*,v* in gU,V instead of in guNm1,gvNm1
506    o in order to put the momForcing out of the Adams-Bashforth:
507      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
508      to timestep.F
509    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
510    o re-generate output for highly sensitive test-exp:
511       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
512    
513    checkpoint50b_pre
514    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
515    o corrected CPP option mismatch in exf_Bulk... functions for case
516      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
517    
518    checkpoint50a_post
519    o Bug fix for merging between c50 and KPP.
520      ikey was passed from thermodynamics to kpp_calc via
521      common block rather than being recomputed in kpp_calc,
522      in contradiction with new key itdkey.
523      New key ikppkey created, and tamc.h headers updated.
524    
525    checkpoint50
526    - 2nd step of merge with ecco-branch:
527      merge changes in ecco-branch back into main trunk
528    - bug fix in find_alpha
529    - more storing in gmredi_calc_tensor.F, kpp_routines.F
530    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
531    - merged some sliced AD support routines
532    
533    checkpoint49
534    merged from ecco-branch:
535    o exf:
536      - Enable initialisation of forcing fields to constant
537        (runtime) values.
538      - in exf_getffields.F
539        Reduce i-/j-loop to interior domain, discarding overlaps.
540        That also fixes wrong TAF-key computations for key_1, key_2
541        with bulf formulae.
542      - exf_init.F modify #ifdef for exf_init_evap
543      - exf_getffieldrec.F, ctrl_getrec.F
544        The following INT-usages are not safe:
545          fldsecs  = int(fldsecs/fldperiod)*fldperiod
546          fldcount = int(fldsecs/fldperiod) + 1
547        and were modified.
548    o autodiff: checkpoint_lev...
549      - updated storing for bulk formulae (some arrays were missing)
550      - added state for seaice package
551      - synchronized with main branch
552    o DIVA:
553      Modif.s in
554      - the_main_loop.F
555      - the_model_main.F
556      and added cost_final_restore.F cost_final_store.F
557      o With these changes, it is possible to fully separate
558        the first forward run to compute the cost function (mdthe_main_loop)
559        and adjoint runs over individual DIVA intervals (adthe_main_loop)
560        into separate model executions.
561        This enables better tuning of DIVA to given queue sizes.
562      o Loss of cost function value in consecutive DIVA runs is
563        fixed by storing to 'costfinal' file.
564      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
565        beginning/end of adjoint integration is accounted for.
566      The current changes apply to TAF-1.4.26.
567      TAF has one remaining bug, requiring one manual change
568      (see MITgcm manual).
569    o cal: synchronized between MAIN and ecco-branch
570    
571    checkpoint48i_post
572    o Changes to restore differentiability of code w.r.t. previous tag
573      (mostly adding new routines to make list and replacing
574      pressure by totPhiHyd).
575    o Updated and merged grdchk package
576      - has both ADM and TLM checks
577      - works for single- and multi-proc.
578      - output cleaned
579      - worked successfully for parallel DIVA
580    o genmake:
581      - Adding -platform=SP4
582      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
583    o Modif. for DIVA:
584      ctrl_unpack should not be called in intermediate DIVA interval.
585      (similar thing would apply for active files such as
586      tbar, sbar, psbar, which should not be reinitialised;
587      only relevant for ecco-branch)
588    
589    checkpoint48h_post
590    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
591    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
592    o Added SEAICE_initialHEFF to pkg/seaice
593    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
594    
595    checkpoint48g_post
596    --- EOS:
597    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
598      store total Potential in totPhyHyd for diagnostics & EOS.
599    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
600    --- Pressure/geopotential gradient:
601    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
602    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
603      ( changes results of global_ocean_pressure )
604    o NLFS + z-coord.: add eta*Rho' contribution.
605    o accurate phiHyd when using interface-W at the middle between 2 centers
606     ( changes results of ideal_2D_oce )
607    o includes r* 2nd term in potential gradient.
608    
609    checkpoint48f_post
610    Merging from release1_p12:
611    o Modifications for using pkg/exf with pkg/seaice
612      - improved description of the various forcing configurations
613      - added basic radiation bulk formulae to pkg/exf
614      - units/sign fix for evap computation in exf_getffields.F
615      - updated verification/global_with_exf/results/output.txt
616    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
617      (SBO) core products, including oceanic mass, center-of-mass,
618      angular, and bottom pressure (see pkg/sbo/README.sbo).
619    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
620      to avoid negative values in shallow regions.
621      - updated verification/natl_box/results/output.txt
622      - updated verification/lab_sea/results/output.txt
623    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
624    o Added useSingleCpuIO option (see PARAMS.h).
625    o Updated useSingleCpuIO option in mdsio_writefield.F to
626      work with multi-field files, e.g., for single-file pickup.
627    o pkg/seaice:
628      - bug fix in growth.F: QNET for no shortwave case
629      - added HeffFile for specifying initial sea-ice thickness
630      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
631    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
632      kpp_transport_t.F, forward_step.F, and the_main_loop.F
633    o pkg/seaice:
634      - adjoint-friendly modifications
635      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
636    
637    checkpoint48e_post
638    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
639    o dynamics: change definition of computational domain & adapt mom_fluxform
640      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
641    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
642        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
643        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
644        global_ocean.90x40x15 global_with_exf global_ocean_pressure
645        inverted_barometer solid-body.cs-32x32x1
646      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
647    
648    checkpoint48d_post
649    o in preparation for r*:
650     a) use pre-computed gradient of hydrostatic potential:
651        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
652     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
653        => affects results of glob_oce_pressure (different truncation error)  
654      update output.txt of ideal_2D_oce & global_ocean_pressure
655    
656    checkpoint48d_pre
657    o in preparation for r*:
658      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
659      pass the 2 comp. of the grad. as arguments to momentum S/R.
660      but for the moment, only used if it does not change the results.
661    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
662    
663    checkpoint48c_post
664    Modifications in treatment of initial flux forcing controls
665    to avoid extra storing of flux fields.
666    
667    checkpoint48c_pre
668    o Added tidal_basin_2d experiment (currently 1D!)
669    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
670    
671    checkpoint48b_post
672    o r* coordinate added in #ifdef NONLIN_FRSURF block.
673     (modification to pressure gradient not yet implemented)
674    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
675      (for U & V) that are used for vertical advection of momentum.
676    
677    checkpoint48a_post
678    o In preparation for r*, use temp. array to compute vertical transport
679       in flux-form momentum pkg. => change results of few test-exp.
680      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
681                        lab_sea, natl_box & plume_on_slope
682    
683    checkpoint48
684    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
685    
686    checkpoint47j_post
687    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
688    o moved adexch from forward_step to addummy_in_stepping
689    o added exch in ctrl_map_...
690    o aveFreq.=0. at end of cost_final to avoid overwrite in
691      reverse checkpointing loop
692    o Yet more changes in gmredi:
693      * adgmredi_calc_tensor
694        avoiding all recomputation of gmredi_slope_limit
695      * adgmredi_x/y/rtransport
696        added flag for excessive storing to avoid recomp. of
697        u/v/rtans, dTdx/y/z
698        -> this is not really necessary and very memory-consuming
699      * adgmredi_slope_psi:
700        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
701      * gmredi_slope_limit
702        re-activated full calculation of taperfct for case 'ac02'
703    o updating verification/ adjoints of carbon, global_ocean.90x40x15
704    
705    checkpoint47i_post
706    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
707    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
708      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
709    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
710    o gmredi: fix few bugs.
711    
712    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
713    This will be a good checkpoint to plug into the ecco-branch.
714    o few modif.'s to get latest version adjointed
715      (mainly kick out code in ini_linear_phisurf)
716    o modif's to run adjoint with exactConserv
717    o case GM_BOLUS_ADVEC should be cleaned
718      S/R gmredi_slope_psi should be cleaned
719    o verification/carbon now has exactConserv=.TRUE.
720    
721    checkpoint47g_post
722    o time-average AIM output: becomes independent from statvars time-average
723      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
724    o After TAF bug fix:
725      Tested adjoint of gmredi package.
726      Tests were done with checkpoint47 rather than with latest
727      checkpoint47f_post since the latter is broken for the adjoint
728      verification/carbon/ contains both ADM and TLM gradient checks.
729    Here they are, before they get changed/lost/stolen.
730    Mostly modif.'s to fix numerical sensitivities.
731    Gradient checks OK for
732    - GM_taper_scheme:
733      * clipping
734      * ac02
735      * linear
736      * glw91
737      * dm95
738      * ldd97
739    - GMREDI_OPTIONS:
740      * GM_VISBECK_VARIABLE_K
741      * GM_NON_UNITY_DIAGONAL
742      * GM_EXTRA_DIAGONAL
743      * GM_BOLUS_ADVEC
744    in conjunction with data.gmredi parameters to be checked in
745    in a few minutes under verification/carbon/code/
746    
747    checkpoint47f_post
748    Merging from release1_p10:
749    o modifications for using pkg/exf with pkg/seaice
750      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
751        and SEAICE_EXTERNAL_FLUXES
752      - pkg/exf CPP options EXF_READ_EVAP and
753        EXF_NO_BULK_COMPUTATIONS
754      - usage examples are Experiments 8 and 9 in
755        verification/lab_sea/README
756      - verification/lab_sea default experiment now uses
757        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
758    
759    checkpoint47e_post
760    o created a tag prior to creating a branch
761    
762    checkpoint47d_post
763    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
764      at the bottom boundary had an erroneous half slip boundary condition
765    o added bottom drag and no slip boundary condition capabilities to
766      oceanic pressure coordinates code
767    o added new verification experiment global_ocean_pressure, this experiment is
768      also described in the tutorial section of the manual
769    checkpoint47d_pre
770    
771    checkpoint47c_post
772    o Added a verification experiment for a global cubed-sphere ocean run
773      -  verification/global_ocean.cubed32x32x30
774      -  uses pkg/therm_seaice and pkg/bulk_forcing
775    
776    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
777    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
778      when using P-coordinate; only implemented for atmospheric config.
779    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
780      NOTES: requires option NONLIN_FRSURF to be "#define".
781    o update advect_xz/results/output.txt (left from checkpoint44g_post)
782    
783    checkpoint47b_post
784    Merging from release1_p9:
785    o pkg/seaice
786      - removed GOTO's and added taf directives
787      - double precision constants to reduce the g77 (Linux)
788        to F77 (SGI) differences reported in release1_p8
789    o tools/genmake
790      - added SGI options
791    o verification/testscript
792      - updated to that of checkpoint47a_post
793    o verification/global_ocean.90x40x15/input/eedata
794      - modified for SGI f77 compatibility
795    o verification/lab_sea
796      - added description of sea-ice model
797      - added missing matlab routines
798      - added test of thermodynamics parallelization
799    
800    checkpoint47a_post
801    o new pkg: aim_v23
802     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
803       for now, keep the same surface forcing as before.
804     - Part-Cell implemented into AIM; check that Heat & Water are conserved
805     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
806     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
807    o add diagnostic of surface correction term in monitor output
808    
809    o bulk_force and therm_seaice
810    - Two packages:  bulk_force (Bulk forcing)
811      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
812    - Earlier integration from Stephaine Dutkiewicz
813      and Patrick Heimbach.
814    - Two ifdef statements for compile time,
815       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
816    
817    checkpoint47
818    differentiable version of checkpoint46n_post
819    o bug fix in quasihydrostaticterms
820    o * "clean" adjoint code (in terms of extensive recomputations)
821        can now be obtained for all GMREDI options (i.e. for
822        - GM_VISBECK_VARIABLE_K
823        - GM_NON_UNITY_DIAGONAL
824        - GM_EXTRA_DIAGONAL
825        - GM_BOLUS_ADVEC )
826      * However, wrong gradient check problem remains unsolved.
827      * New CPP options have been introduced for different
828        tapering schemes
829    o external_fields_load now part of differentiation list
830    o pressure needs multiple storing;
831      would be nice to have store_pressure at beginning or
832      end of forward_step, e.g. by having phiHyd global (5-dim.)
833      (NB: pressure is needed for certain cases in find_rho,
834      which is also invoked through convective_adjustment).
835    o recomputations in find_rho for cases
836     'JMD95'/'UNESCO' or 'MDJWF' are OK.
837    o #define ATMOSPHERIC_LOADING should be differentiable
838    o ini_forcing shifted to begining of initialise_varia
839    o Incorporating QNVS line search routines into MITgcm
840      (this is separate code, and therefore not under pkg)
841      lsopt/, optim/
842    o Updated verification/carbon/
843      - #define GM_VISBECK_VARIABLE_K
844      - GM_taper_scheme    = 'ldd97'    
845    
846    checkpoint46n_post
847    Merging from release1_p8:
848    o verification/natl_box:
849      updating new external_fields_load routine
850    o New package: pkg/seaice
851      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
852      The sea-ice code is based on Hibler (1979-1980).
853      Two sea-ice dynamic solvers, ADI and LSR, are included.
854      In addition to computing prognostic sea-ice variables and diagnosing
855      the forcing/external data fields that drive the ocean model,
856      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
857      The implied surface heat flux is then stored in variable
858      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
859      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
860      non-local transport term.  Because this call precedes model
861      thermodynamics, temperature under sea-ice may not be "exactly" at
862      the freezing point by the time theta is dumped or time-averaged.
863      N.B.: fairly large differences in accuracy occur across
864            different platforms/compilers; comparison between
865            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
866            generated output gives:
867       T           S           U           V
868      C D M    c        m  s        m  s        m  s        m  s
869      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
870      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
871      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
872    
873      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
874    o GAD:
875      - generated new common blocks to account for call of
876        same gad routines with differing traceridentities
877        (needed to modify tracerIdentity indices in GAD.h)
878      - generated separate common blocks for case useCubedSphereExchange
879        (Department of Futurology)
880      - parameter lists to gmredi_?transport: added tracerIdentity
881      - added new key indices to tamc.h
882    o external_fields_load:
883      - added this routine to TAF list
884      - needed to make some common blocks global and additional storing
885        along the same lines as exf package (checkpoint_lev?_directives.h)
886    o exf:
887      updated external forcing package
888      - bug fixes carried over from ecco-branch
889        (missing OBCS_OPTIONS.h in two routines)
890      - enable easy to use "no forcing".
891      - added exf I/O for atmospheric loading
892      - added exf I/O for runoff data
893      - transfered scaling between exf <-> MITgcm to exf namelist
894    o Adding new verification experiment global_with_exf.
895      This verification experiment is almost identical to the
896      global_ocean.90x40x15 experiment, except that it uses
897      the exf (and cal) package instead of the
898      external_fields_load routine (cf README file).
899    
900    checkpoint46m_post
901    o modified testscript to return -- when there are no lines of "%MON" output
902    o added new flag "quasiHydrostatic" for QH mode
903      and new routine quasihydrostaticterms()
904    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
905      New routine: mom_u_coriolis_nh()
906    o fixed sign of non-hydrostatic metric terms in u and v equations.
907      Depend on correct sign of gravitySign.
908    o added work.pc* to .cvsignore in aim directories using ifc
909    o introduced flag for controllin non-hydrostatic metric terms
910    o removed gravitySign from PARM04
911    o switched to g77/ifc from pgf77 in aim experiments
912    
913    checkpoint46l_post
914    o made convective adjustment work with pressure coordinates:
915     - changed the direction of k-loop in convective_adjustment.F for the
916       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
917     - adjusted the reference pressure k-index in convective_adjustment.F
918     - adjusted the convection condition in convect.F (in analogy to
919       calc_ivdc.F)
920     - convective_adjustment no longer computes anything on the halos
921     - removed the warnings about negative salinity from find_rho.F and
922       find_alpha.F; instead the new routine look_for_neg_salinity, called
923       at the beginning of find_rho, find_alpha, and find_beta, does a
924       check of the entire slice, if CPP-option
925       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
926    checkpoint46l_pre
927    
928    checkpoint46k_post
929    o fixed the verification/global_ocean.90x40x15 experiment:
930     - new bathymetry (the world according to A., JMC, and M.)
931     - new initial fields and forcing fields (*.bin files)
932     - new POLY3.COEFFS (for the next release one should switch to a full
933       equation of state: JMD95P or MDJWF)
934     - fixed several errors and redundancies in the data file
935     - experiment uses looped cells
936     - added matlab directory with diagnostic scripts for plotting of output
937    
938    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
939     - read AIM physics parameters from a file (data.aimphys)
940     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
941    
942    checkpoint46j_post
943    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
944    o move wVel computation at the end of the time step, in S/R integr_continuity
945    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
946    o update timeave pkg for wVel diagnostic.
947    checkpoint46j_pre
948    
949    checkpoint46i_post
950    o Clean up AIM package (and keep the results unchanged):
951      include CPP_OPTION and use IMPLICT NONE in all routines ;
952      declare all the variables _RL ; use _d 0 for all numerical constants.
953      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
954    
955    checkpoint46h_post
956    o cleaned up the use of rhoNil and rhoConst.
957      - rhoNil should only appear in the LINEAR equation of state, everywhere
958        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
959        and the dynamical equations are all divided by rhoConst
960    o introduced new parameter rhoConstFresh, a reference density of fresh
961      water, to remove the fresh water flux's dependence on rhoNil. The default
962      value is 999.8 kg/m^3
963    o cleanup up external_forcing.F and external_forcing_surf.F
964      - can now be used by both OCEANIC and OCEANICP
965    checkpoint46h_pre
966    
967     Added code to convert surface volume flux (fresh water) into
968     a mass flux when using P coordinates in the ocean (OCEANICP).
969     Note: It assumes you have set rho0=rhoConst=density of fresh water.
970    
971    checkpoint46g_post
972    o Include a new diagnostic variable phiHydLow for the ocean model
973      - in z-coordinates, it is the bottom pressure anomaly
974      - in p-coordinates, it is the sea surface elevation
975      - in both cases, these variable have global drift, reflecting the mass
976        drift in z-coordinates and the volume drift in p-coordinates
977      - included time averaging for phiHydLow, be aware of the drift!
978    o depth-dependent computation of Bo_surf for pressure coordinates
979      in the ocean (buoyancyRelation='OCEANICP')
980      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
981        Theta, Salinity, and Pressure in the parameter list. This routine is
982        presently contained in find_rho.F. This routine does not give the
983        correct density for 'POLY3', which would be a z-dependent reference
984        density.
985    o cleaned up find_rho
986      - removed obsolete 'eqn' from the parameter list.
987    o added two new verification experiments: gop and goz
988      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
989    checkpoint46g_pre
990    
991    checkpoint46f_post
992    o Enable tangent linear (forward mode) gradient checks:
993      - extended active file handling to g_... files
994      - added TANGENT_SIMULATION to theSimulationMode
995      - extended grdchk package accordingly
996    o added tangent linear setup in verification/carbon/code_ftl
997    o added adjoint setup in verification/front_relax/code_ad
998    
999    checkpoint46e_post
1000    o Added new equation of state -> MDJWF
1001      - EOS of McDougall et al., 2002, JAOT, submitted
1002      - caveat: the equation of state is only valid for a smaller (more
1003        realistic?) range of values than JMD95P/Z and UNESCO
1004      - added masks to the calculation of pressure in store_pressure
1005      - added more check values for density in check_eos (ini_eos.F), some of
1006        the old check values are out of the range of the MDJWF-eos, so don't
1007        expect perfect matches for those
1008    checkpoint46e_pre
1009    
1010    checkpoint46d_post
1011    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1012      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1013      case of pressure coordinates. eosType='JMD95Z' in
1014      combination with buoyancyRelation='OCEANICP' now causes an error.
1015    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1016      in find_alpha/beta.
1017    checkpoint46d_pre
1018    
1019    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1020      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1021    
1022    checkpoint46c_post
1023    o Changes necessary for ocean in p-coordinates
1024     -  Added new buoyancy relation = 'OCEANICP'
1025     -  Added new parameters = gravitySign (this used to be contained inside
1026        the factor dRdZ which I added when we first switched to R coordinates).
1027     X GM/Redi is not compatible (yet)
1028     X bottom drag and no-slip need to be debugged.
1029    checkpoint46c_pre
1030    
1031    checkpoint46b_post
1032    o Added new equation of state -> JMD95Z and JMD95P
1033      - EOS of Jackett and McDougall, 1995, JAOT
1034      - moved all EOS parameters into EOS.h
1035      - new routines ini_eos.F, store_pressure.F
1036    o Added UNESCO EOS, but not recommended because it requires
1037      in-situ temperature (see JMD95)
1038    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1039      unesco.f to be used with POLY3
1040    checkpoint46b_pre
1041    
1042    checkpoint46a_post
1043    o Added (atmospheric) pressure loading
1044      - new field in FFIELDS.h, etc...
1045      - new cpp flag ATMOSPHERIC_LOADING
1046    o Changed hFacC to _hFacC in calc_phi_hyd.F
1047    o Added SHORTWAVE_HEATING to some files for consistency
1048    checkpoint46a_pre
1049    
1050    checkpoint46
1051    further merges from release1_p5
1052    o new ctrl package
1053      - adopted from ECCO environment to enable optimization
1054      - added Eliassen Palm fluxes to controls
1055    o added Eliassen Palm flux controls to gradient check package
1056    o cost package
1057      - Compatible with new ctrl package
1058      - added Eliassen Palm cost hooks
1059      - modif's of existing cost functions
1060    o Adjoint-related bug fixes in kpp:
1061      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1062      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1063    o autodiff package
1064      - flow directives:
1065        + new for S/R do_the_model_io
1066        + enhanced for S/R checkpoint
1067        + new gmredi.flow
1068      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1069        disable adcommon.h/g_common.h by default.
1070      - fixed problem for adjoint of global_max
1071    o modified verification/carbon/
1072    o New setup for adjoint of global_ocean
1073    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1074    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1075    o incorporated hooks for sponge layer code (external_forcing.F)
1076    
1077    checkpoint45d_post
1078    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1079    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1080      (affects plume_on_slope "cg2d" output)
1081    o add new parameter deltaTfreesurf for free-surface time stepping
1082    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1083    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1084    o change phiMin in exp1 (to agree with documentation)
1085    o add new flags:
1086     - T,S forcing inside/outside Adams-Bashforth
1087     - turn off temp,salt advection and/or forcing
1088     - for each tracer, define internal flag for multiDimAdvection & A-B
1089    o monitor: change definition of KE to check conservation of Energy
1090    
1091    checkpoint45c_post
1092    o Removed f90 comments ("!")
1093    o Modified initialisations to enable exf package for MITgcm
1094      (without invoking ECCO_PACKAGE).
1095    o modifications to gradient check package (Martin Losch)
1096      - enable centered differences
1097      - modified format of standard output
1098    
1099    checkpoint45b_post
1100    o cleaned exchange calls in cg2d
1101    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1102    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1103      to configure barotropic setup (Martin Losch)
1104    o moved some initialisations within bi,bj loop in dynamics
1105      (TAF flow dependency)
1106    o in initialise_varia, moved call packages_init_variables
1107      before convective_adjustment_init
1108      (corresponding adjustment of TAF tape initialisation).
1109    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1110    
1111    checkpoint45a_post
1112    o compute Rho over the whole domain (extend iMin,jMin indices)
1113    o specific exchange for X-slice domain (case Ny=1)
1114    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1115    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1116    
1117    checkpoint44h_post = checkpoint45
1118    o Fix to restore differentiability:
1119      place at which packages_init_variables is called in
1120      initialise_varia is crucial for reverse control flow.
1121    o modifications in GMRedi to enable stable adjoint
1122      (corresponding modif's in thermodynamics, dynamics)
1123    o added missing hook for sponge layer code in external_forcing
1124    o modified test cost functions
1125    o storing in gad_advection (plus removal of write(0,*)!
1126    o missing headers TR1.h added in convective_adjustment routines
1127    o errorMessageUnit set non-equal zero in eeboot
1128      (conflict on some platforms, e.g. IBM SP3)
1129    o modified carbon verif.
1130    
1131    checkpoint44h_pre
1132    o vertical grid option: allow to put the Interface at the middle between
1133      2 cell-centers ; replace delZ in pkg/kpp by drF.
1134    o GM Advective form: Tracers are advected using the residual transport (=
1135      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1136    
1137    checkpoint44g_post
1138    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1139      results) ; ifdef missing in thermodynamics.F
1140    
1141    checkpoint44f_pre,checkpoint44f_post
1142    o added PTRACERS package
1143      This allows an arbitrary number of passive tracers to be integrated
1144      forward simultaneously with the dynamicaly model.
1145      + Implemented so far:
1146        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1147        - I/O and checkpointing
1148        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1149      + Not implemented so far:
1150        - KPP
1151        - OBCS
1152      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1153        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1154        line in data.pkg.
1155      + This package is disabled by default since it increases storage.
1156    
1157    
1158    o testscript: added -cleanup option
1159    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1160                 b) enable to filter 2D fields.
1161    
1162    checkpoint44e_pre,post
1163    o re-wrote convective adjustment to use pre-calculated weights
1164      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1165      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1166      Original calls to convect() still in place.
1167    
1168    chkpt44d_pre,post
1169    o added missing EXCLUDE_MONITOR flags
1170    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1171      (incompatible typ in MIN/MAX expressions caused problems
1172      on IBM SP3)
1173    o in genmake added variable MAKEDEPEND
1174      plus resetting for case SunOS
1175    o added timer_stats.c routine for IBM SP3
1176    o removed variables in dynamics
1177    !!! I forgot to create tag chkpt44d_pre !!!
1178    !!! But chkpt44d_pre = chkpt44c_post    !!!
1179    
1180    o real fresh water flux implemented with non-linear free-surface.
1181    
1182    chkpt44c_pre,post
1183    o few fix (mask in shap_s2, EmPmR in external_field_load,
1184      USE_NATURAL_BCS in solve_for_P);
1185    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1186    
1187    checkpoint44b_pre/_post
1188    o merge of relevant stuff from the ecco-branch:
1189      - genmake: removed $S64 overwrite for case SunOS
1190      - pkg/exf: update and corrections for field swapping and obcs
1191      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1192                  harmonized between ECCO and MITgcm
1193      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1194                      updated checkpointing_lev... lists for obcs
1195      - model/src: minor changes in forward_step, plot_field
1196                   added directive for divided adjoint in the_main_loop
1197      - pkg/mdsio: added mdsio_gl_slice
1198    
1199    o check parameters & config (chkpt44a_pre,post)
1200    o OBC and NonLin_FrSurf.
1201    
1202    checkpoint44
1203    o fix bug in mom_vi_del2uv
1204    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1205    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1206    o update AIM experiments (NCEP input files)
1207    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1208    o added some stuff for AD
1209    
1210    checkpoint43
1211    o added two new advection tests
1212    o added global 4x4 degree ocean test
1213    o added test of H&S94 with free surface on cube
1214    o some final mods for gradient check, adjoint,...
1215    
1216    checkpoint42
1217      Fixed AD-related problems:
1218    o Store directives up-to-date with re-arranged Adams-Bashforth
1219      (mainly thermodynamics.F)
1220    o New store directives for multi-dim. advection schemes
1221      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1222      * new common block and key passkey
1223      (mainly gad_advection.F)
1224    o Modified store directives for split of dynamics/thermodynamics
1225      for the case ALLOW_KPP
1226    o Cleaned argument list for timestep_tracer.F
1227    
1228    checkpoint41
1229    o re-formatted/added comments in prologues of key subroutines
1230      to work with protex
1231    
1232    checkpoint40
1233    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1234    o added FLT (floats) package from Arne along with demo. experiment
1235    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1236      implementation of forward-in-time forcing terms
1237    o more mods for non-linear free-surface including new variable
1238    o modified multi-dim method to work on cube
1239    o bug fix in KPP (from DM)
1240    
1241    checkpoint40pre9
1242    o added DST advection schemes
1243    o fix MPI bug on SGI's
1244    o modifications for non-linear free-surface
1245    o fixed conditionals for fixed flow/passive tracer only mode
1246    o added tension/strain form of stress tensor
1247    o changes to commenting of arguments for TAF/TAMC
1248    o added/updated many matlab scripts
1249    o added multi-dimensional advection method for tracers
1250      
1251    checkpoint40pre8
1252    o new package rw/
1253      Added method for dumping intermediate local arrays:
1254      mdsio_writetile - same as mdsio_writefield except works from inside
1255                        bi,bj loop
1256      mdsio_writelocal - same as mdsio_writetile except works for local
1257                         arrays
1258      write_local_r? - higher-level wrapper for mdsio_writelocal
1259      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1260      Example given at end of mom_vecinv.F that dumps some local arrays.
1261    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1262      control flux-form versus vector invariant code.
1263      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1264      or genmake -DISABLE ...
1265    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1266      (additional storing is now needed for case vecinv;
1267      currently nothing implemented to switch this storing off
1268      in case fluxform is used since no CPP flag available).
1269    
1270    checkpoint40pre7
1271    o bug fix in dynamics.F
1272      calc_viscosity called before k=1,Nr loop.
1273    o added some #ifdef's ALLOW_PASSIVE_TRACER
1274    o cleaned initialisations in ctrl_map_ini
1275      related to TAF
1276    
1277    checkpoint40pre6
1278    o split dynamics into thermodynamics & dynamics
1279    o corresponding split of calc_diffusivity into
1280      calc_diffusivity, calc_viscosity
1281      (kpp_calc_diff, kpp_calc_visc).
1282    o Added diffkr, kapgm to control variables
1283    o bug fix in gmredi_slope_limit for ldd97
1284    
1285    checkpoint40pre5
1286    o proper initialization of Adams-Bashforth time stepping
1287      + uses forward step for very first step of model (iter=0)
1288    o re-generated *all* output since almost all output is modified by this
1289      change (sorry but we've been putting this one off for about 2 years)
1290      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1291        *not* regenerated since they are already out of date and I don't
1292        want to create the impression that they are suddenly working.
1293    o removed KAP stuff for DEC's
1294    o modified/added many .cvsignore files in */code and */input
1295    o added new expt "solid-body.cs-32x32x1"
1296      + this uses an alternative form of ini_curvilinear_grid.F which
1297        is not necessarily any better than the current one...
1298    
1299    checkpoint40pre4
1300    o added re-initialisations of utrans,vtrans,rtrans in
1301      calc_common_factors which are crucial for TAF.
1302    o extended iMin,jMin range for calc_common_factors,
1303      calc_diffusivity
1304    o added option ALLOW_PASSIVE_TRACER
1305    o a few minor updates and fixes
1306    
1307    checkpoint40pre3
1308    o created calc_gtr1.F for gad package
1309    o split the_main_loop and re-introduced forward_step
1310    o some recomputations of nIter0 for TAMC
1311    
1312    checkpoint40pre2
1313    o Updated to latest branch of AJA, JMC
1314    o Added gradient check package
1315    o Added routines for passive tracer handling
1316    o Added carbon sequestration sensitivity experiment
1317    
1318    checkpoint39
1319     o Modifications and fixes to support TAMC
1320       (mainly missing or wrong directives)
1321     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1322       in addummy_in_stepping
1323     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1324     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1325     o Included following packages:
1326       cal: calendar
1327       exf: external forcing
1328       ecco: essential routines to control use of cal, exf
1329             (NB: this is not the full ECCO environment)
1330     o disabled some packages by default in genmake
1331    
1332    checkpoint38
1333     o see notes_c37_adj.txt
1334     o corrected wrong layer index in external_forcing_t
1335     o replaced the_main_loop/forward_step by the_main_loop
1336     o removed forceoutput from write_state
1337       (replaced criteria for initial/final state)
1338     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1339    
1340    checkpoint37
1341     o mdsio.F routine split and packaged in pkg/mdsio
1342       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1343        used unless genmake -disable=mdsio)
1344     o allow a more precise surface-geopotential gradient for the atmosphere
1345       taking into account the change in space of Alpha (=1/rho) at the surface.
1346     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1347       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1348     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1349       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1350       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1351     o Time-Average diagnostics defined as a pseudo package "timeave".
1352     o pickup files : old pickup (before c35) did not work with new code (c35
1353       and after) unless activating 2 commented lines in initialise-varia.
1354     o Non-Hydrostatic pickup file Pb fixed.
1355     o bug with Rigid-lid version (since c35) fixed.  
1356    
1357    checkpoint36
1358     o implement Crank-Nickelson barotropic time-stepping
1359     o recover Time-Average diagnostics
1360     o fix Pb in checkpoint (PR#19)
1361     o AIM become a standard package ; clean unused CPP_kees
1362    
1363    checkpoint35
1364     o subtantial rewrite of dynamics.f
1365     o allows staggered time-stepping
1366     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1367     o added bottom drag (linear + quadratic)
1368    
1369    checkpoint34
1370     o Modified exchange routines for correct reverse simulation.
1371     o Added verification output to comply with bug fix in impldiff.F
1372       as of c33 (exp2, natl_box).
1373     o Corrected store directives in dynamics.F
1374     o Corrected array boundaries in impldiff.F
1375     o Corrected array dimensions in gmredi.
1376       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1377     o Added routine GLOBAL_SUM_INT to global_sum.F
1378     o Added mdsio_gl.F for ECCO purposes.
1379    
1380    checkpoint33
1381     o Fixed bug in lower BC in impldiff.F
1382     o Fixed confusion about units of forcing arrays in FFIELDS.h
1383       namely Fu,Fv,Qnet,Qsw,EmPmR:
1384       - Removed verification/natl_box/code/external_fields_scale.F
1385         (did not differ from that in model/src)
1386       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1387         (see FFIELDS.h for description)
1388       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1389         kpp_calc.F and kpp_transport_t.F
1390       - Removed model/src/external_fields_scale.F and calls to it
1391       - verification/natl_box uses flux data with "atmospheric" sign so
1392         a special version of external_fields_load.F is used to
1393         change the data as it's read in. This way, the arrays
1394         have the right units and signs at all times tha a user could
1395         possibly use them.
1396     o Corrected genmake to delete a temporary file during configuration
1397    
1398    checkpoint32
1399     o Scaling of forcing fields moved from external_forcing.F to
1400       external_fields_scale.F, called directly after loading fields.
1401     o Surface relaxation terms added to surface tendency fields in
1402       extra subroutine.
1403     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1404       fields.
1405     o Changes in GMRedi to comply with packaging structure.
1406     o Modifications and bug fixes in KPP package.
1407     o Verification experiment for KPP added (verification/nat_box/)
1408    
1409    checkpoint31
1410     o Packages interface brought in line with defined standard
1411       -> new routines packages_...F
1412       -> changes in initialise_fixed.F, initialise_varia.F
1413       -> enables initialisation interface for ECCO package
1414     o Rescaling of external forcing fields immediately after read
1415       (removed from external_forcing.F)
1416       -> new: surface_fields_scale.F
1417       -> affects ini_foorcing.F, external_fields_load.F
1418     o Computation of surface tendencies before tendency updates.
1419       -> new: external_forcing_surf.F
1420     o Change of variable names useGMRedi, useKPP, useECCO
1421     o Further changes in dynamics.F, impldiff.F for TAMC
1422     o Tested for experiments 0, 2, 4.
1423       - not yet tested for GMRedi.
1424       - not yet tested for KPP.
1425    
1426    checkpoint30
1427     o Updates for OBCs
1428     o New experiment for test OBCs (internal_wave)
1429     o New output.txt in verification/exp4/results/
1430     o Updates for KPP: calculation of viscosity corrected, new variables
1431       kpp_dumpFreq and kpp_taveFreq
1432     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1433       and entry for T90 in genmake
1434    
1435    checkpoint29
1436     o packaged KPP and GM/Redi
1437    
1438    checkpoint28
1439     o Corrected initialization of hFacMin for difference vertical coordinates
1440     o Modified calculation of partial cell thickness to more robust algorithm
1441     o config_summary.F: replaced write_1D_... by write_0D_...
1442       read_write.F: added subroutines write_0D_...
1443     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1444       included some initialisations required for TAMC.
1445     o routine calc_isoslopes: modified sqrt computation to make it
1446       differentiable for zero argument.
1447     o routines dynamics, impldiff:
1448       included store directives and tape key computations required for TAMC.
1449     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1450    
1451    checkpoint27
1452     o fixed calc_isoslopes() to so that cancellation of terms in tensor
1453       formulation works properly with variable resolution.
1454     o restructured the calling tree between the_model_main() and dynamics()
1455     o split initialise() into initialise_fixed() and initialise_varia()
1456     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
1457       in new routine ini_psurf()
1458    
1459    checkpoint26
1460     o moved some #ifdef in optional routines to encompass everything
1461       except the argument declarations. This was using up some memory.
1462     o fixed macros like _ADT to work with both versions of Linux cpp
1463     o cleaned up some unused and uninitialized variables
1464       (helps when debugging with strict compile options)
1465     o split up CPP_EEOPTIONS.h into options and macros
1466       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1467     o patch for 2 processor JAM mode
1468    
1469    checkpoint25
1470     o updates for OBCs and NH
1471     o dramatically reduced memory usage
1472     o added "JAM" routines for use on Artic network
1473     o parameterization of convection by implicit vertical diffusion
1474     o added a diagnostic of convective index
1475     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1476       (this is was partly for OBCs and NH but also in anticipation of
1477        an explicit free-surface option)
1478     o initial state input files for U and V
1479    
1480    checkpoint24
1481     o Removed some spurious "REAL"s
1482     o Updated KPP to latest version from JPL
1483     o Added a COS(latitude) in horizontal viscosity
1484    
1485    checkpoint23
1486     o Added del^4 diffusion for salt and temperature
1487     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1488    
1489    checkpoint22
1490     o Made many small changes: implicit none, format(i5), etc...
1491     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1492    
1493    checkpoint21
1494     o Introduced new I/O package that supports direct-access records (mdsio.F)
1495     o Split-up mid-level I/O routines
1496     o Updated input data for experiments 0,1,2,4 and 5
1497     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1498    
1499    checkpoint20
1500     o Tidied up open-boundaries some more
1501     o Added non-hydrostatic code
1502     o Fixed some input data
1503     o Modified MPI start-up to work in "coupled" context.
1504    
1505    checkpoint19
1506     o Tidied up directory structure for verification experiments.
1507     o Added new code for open boundaries.
1508     o Corrected advective terms near boundaries.
1509     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1510     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1511     o Split default parameters out of ini_parms.F into set_defaults.F.
1512    
1513    checkpoint18
1514     o Further changes for optional code generation with
1515       CPP - ugh!
1516    
1517    checkpoint17
1518     o Beginning to incorporating modularity
1519       for supporting atmos. and ocean configs.
1520     o Small changes for TAMC complinace
1521     o New ultra simple test case. Barotropic box
1522       configuration "exp0".
1523    
1524    checkpoint16
1525     o Minor changes to exchange routines to support
1526       accumulation in reverse mode. Adjoint of an
1527       assignment is an addition.
1528     o Changes to support compilation by TAMC (LR(1)
1529       syntax) and by g77 under Linux ( 72 character
1530       limit ).
1531    
1532    checkpoint15
1533     Rewrote exchange routines to allow
1534     o General tile <-> tile connectivity.
1535     o TAMC reverse mode flag ( is this really needed? )
1536     o Variable width overlap and exchange region widths.
1537     o Hooks for sharing data via DMA, Arctic, Memory Channel,
1538       shmput/shmget, VIA, SYSV shmem and every other cool
1539       communication method.
1540    
1541  checkpoint14  checkpoint14
1542   Consistent isomorphism chages made. These allow dynamical core   Consistent isomorphism chages made. These allow dynamical core
1543   to support both pressure and meters as a vertical coordinate.   to support both pressure and meters as a vertical coordinate.

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