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revision 1.4 by cnh, Mon Jun 8 22:38:51 1998 UTC revision 1.271 by heimbach, Tue Mar 23 19:47:05 2004 UTC
# Line 2  $Header$ Line 2  $Header$
2    
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    o MNC:
6      - make myThid the last argument for all subroutines
7      - new default for the grid files: NO halos
8      - add useMNC and other run-time flags
9      - separate per-file-group handling of the unlimited dimension
10      - early initialization of MNC w/ flags read at the eeboot stage
11        and lookup tables set in initialize_fixed
12      - write all MNC output to a freshly-created directory
13    o thermodynamics sea-ice (thsice) is now tested with testreport.
14    o test exp. advect_cs: use the standard cs32 grid ; update output.
15    o Added functionality to grdchk:
16      pick global i,j,k position (or nearest wet) where to perform check.
17    
18    checkpoint52l_post
19    o new land formulation:
20      a) use ground enthalpy as prognostic variable to ensure exact
21         energy conservation.
22      b) account for water temperature and for latent heat of freezing
23         in all processes (rain, run-off, ground storage)
24      c) compute surface and ground temperature implicitly.
25    o aim_v23 modification for new land model:
26      a) Treat separately land / ocean / sea-ice surface fluxes
27         to allow implicit computation of land & sea-ice surface temp.
28      b) add snow precipitation.
29    checkpoint52l_pre
30    
31    o fix problem (when 1 tile is empty) in min/max monitor.
32    o fix bug in timeAve (u,vZetatave in common block)
33    o no restoring terms under ice for pkg/seaice
34    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
35    o bug fix for pkg/seaice pickups
36    o change MNC call locations and add coordinate attributes
37    o mask vorticity at the corner ; affects global_ocean.cs output
38    o fix ini_curvilinear_grid ; test CS experiments with mpi
39    o aim.5l_cs: modify sea-ice fraction input file ; update output
40    o exf: Adding simple range check routine for exf fields after read
41    
42    checkpoint52k_post
43    o removed top-level directory "diags"
44      - we migrated these functions to pkg/timeave a long time ago
45    o fixed bug introduced in pkg/monitor
46    o accuracy ctrlprec = 32 insuffient for gradient checks using
47      averaged fields (I/O via cost_averages)
48      -> use ctrl.h in active_file*.F to control I/O precision.
49    o paramter list of CALL ADTHE_MAIN_LOOP
50    o added initial do_the_model_io to ecco
51    o set all ...Freq to zero after cost_final
52      taveFreq, dumpFreq, pChkptFreq
53    o MAIN and ECCO differentiability restored
54    
55    checkpoint52j_post
56    o fix nchklev in tamc.h for global_ocean...
57    o Bringing flow and store directives up-to-date
58    o Really weird thing!
59      call do_the_model_io from the_main_loop with parameters
60      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
61      TAF places a faulty re-call of initialise_varia
62      after cost_final call which should not be there!
63    checkpoint52j_pre
64    
65    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
66      error messages
67    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
68    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
69      debug output
70    o modfied mdsio_writefield.F to handle non-global files under exch2
71    o update AIM Cubed-Sphere exp (aim.5l_cs):
72      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
73    o update AIM Equatorial Channel exp:
74      use standard aim_v23 pkg and change the SST fields to be more realistic.
75    o globalFile now works with exch2
76    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
77      mon_vort3.F to make exch2 friendly with >1 tile per cube face
78    o limit timeave output for hi-res integrations
79    
80    checkpoint52i_post
81    o removed CPP_EEOPTIONS.h from verification/*/code
82    o updated the tiling for global_ocean_pressure
83    checkpoint52i_pre
84    
85    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
86      the old pkg/aim).
87    
88    checkpoint52h_pre
89    o shortened offending lines in exch2_send_rx?.template
90    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
91    o genmake2: add build & execute test for NetCDF code
92    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
93      old grid files, moved CPP_EEMACROS.h to pkg/exch2
94    o added useSingleCPUIO flag to monitor.F and mon_out.F
95    o added temporary hack for sea-ice dynamics on the cube:
96      metric terms are ignored and it is assumed that
97      there is no sea-ice on cube faces 1, 2, 4, and 5.
98    
99    checkpoint52f_post
100    o added exch2 cube routines to pkg/exch2
101    o modified hs94.cs-32x32x5 to use it
102    o added new grid files to hs94.cs-32x32x5
103    checkpoint52f_pre
104    
105    checkpoint52e_post
106    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
107      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
108    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
109      to work with implicit vertical advection and AB ;
110    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
111    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
112     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
113    checkpoint52e_pre
114    
115    o fix bug in impldiff when Nr=1 or Nr=2.
116    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
117    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
118    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
119      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
120    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
121    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
122    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
123    
124    checkpoint52d_post
125    o re-tiled many expts to allow comparison in multi-processor mode
126      - updated output accordingly
127      - changed hs94.128x64x5 to use intial T from file rather than use the
128        random number generator
129    o add infrastructure in model routines for fizhi and gridalt packages
130    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
131    o changes to permit hi-res, cubed-sphere, configuration
132      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
133      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
134      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
135        of surface winds for the cube
136      (A verification experiment, based on global_ocean.cs32x15, but with
137       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
138       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
139       complete with example surface forcing files and matlab scripts to look
140       at the output and compare it with that of global_ocean.cs32x15.)
141    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
142       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
143       to conform to the common rule.
144    o check-in the first version of the coupler + interfaces for multi-components
145       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
146       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
147       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
148       - ocean and atmos. share the same horizontal grid (no interpolation).
149       - exchanges between component and coupler is done in forward_step
150    o new verification experiment, cpl_aim+ocn:
151       coupled ocean - AIM atmosphere on cs32 grid.
152    
153    checkpoint52d_pre
154    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
155    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
156    
157    checkpoint52c_post
158    o Fixing OPTIONS files for use of exf:
159      - ALLOW_ECCO not needed
160      - ECCO_CPPOPTIONS.h should not be included from
161        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
162        as has been the case in the past
163      - All cal/exf related options are currently set in
164        single header file. Should remain so until we
165        agree on a consistent new policy.
166    o Removed all CPP options for cal package.
167      cal has no more CPP options.
168    o modified STOREs in GAD_ADVECTION
169    o corrected key comp. for passkey
170    
171    checkpoint52b_post
172    o new version: "thsice" of thermodynamic sea-ice pkg:
173     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
174     - modify fluxes but do not change theta directly;
175     - light cleaning of bulk_force pkg (still needed with thsice).
176     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
177       + output_thsice.txt to test thsice & bulk_force pkgs.
178    o put back grid & coriolis monitor output.
179    checkpoint52b_pre
180    
181    o call "do_the_model_io" at the beginning (=> dump initial state)
182    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
183    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
184      (need info on NUMBER_OF_PTRACERS)
185    o missing PTRACERS headers in some routines
186    o default tamc.h in pkg/autodiff supposed to crash
187      to ensure proper customization
188    
189    checkpoint52a_post
190    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
191      - moved surfaceTendencyTice from pkg/seaice to main code
192      - subroutine FREEZE_SURFACE now limits only surface temperature
193        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
194        => new output.txt for global_ocean.cs32x15 & global_with_exf
195      - keep the old version of FREEZE for backward compatibility;
196        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
197      - corresponding modifs for TAF directives
198    o added surface flux output variables to TIMEAVE_STATVARS
199    o time-averaged output for pkg/ptracers
200    o fix problem with ECCO-related divided adjoint
201      snapshot file was missing some ad-variables,
202      but no warning issued by TAF
203    
204    checkpoint52a_pre
205    o some bug fixes for #undef REAL4_IS_SLOW
206    
207    checkpoint52 = ecco_c52_e35
208    o after testing adjoints of checkpoint51u_post
209    
210    checkpoint51u_post
211    o this is the post-merge tag of the ecco-branch
212      (needs another clean checkout and re-testing)
213    o various natl_box_adjoint configs and results
214      but no input fields
215    o obcs adjoint not yet merged!
216    o adding ECCO global 1x1 and 2x2 degree configs
217    o updated/extended some store directives for seaice
218    o pkg/ecco now containes ecco-specific part of cost function
219    o top level routines the_main_loop, forward_step
220      supersede those in model/src/
221      previous input data.cost now in data.ecco
222      (new namelist ecco_cost_nml)
223    o in ctrl/ cleaned some cross-dependencies and updated CPP options
224    
225    checkpoint51t_post
226    o this is the pre-merge tag of the ecco-branch
227    
228    checkpoint51s_post
229    o cleanup: removed various obsolete #define-s
230    o pkg/grdchk
231      - renamed 'ph-grd 3' to 'grad-res'
232      - merged from ecco-branch
233        (remaining bug fixes for obcs gradient checks)
234      - additional high-precision output for testreport
235        (grep for 'precision_grdchk_result')
236    
237    checkpoint51r_post
238    o cleaned up or removed CPP_OPTIONS.h files
239    o updated results for some of the tests to reflect the new
240      optfiles (-ieee: -O0 instead of -O3)
241    
242    checkpoint51q_post
243    o cd_code:
244      - moved cd_scheme.F -> cd_code_scheme.F
245      - separate read_checkpoint from cd_code_ini_vars.F
246      - separated cd_code part from write_checkpoint
247      - updated AD_SOURCE, generated .flow
248      - added CD_CODE_VARS.h to the_main_loop
249      - Moving cd_code specific store dir.s to pkg/cd_code
250    o ctrl package totally restructured
251      - pack/unpack now optional and decoupled from
252        xx_/adxx_ I/O
253      - ctrl_pack/unpack cleaned
254        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
255      - confined inclusion of AD_CONFIG.h to where necessary.
256    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
257    
258    checkpoint51p_post
259    o create initial cd_code package
260      - WARNING: the initialization of fields within packages
261        is broken because INI_FIELDS (where READ_CHECKPOINT is
262        called) is called *before* PACKAGES_INIT_VARIABLES.
263        This seems to be backwards since
264        1) its important to initially zero the entire field including
265           the "halo" region
266        2) zeroing needs to be done *before* reading pickup info
267           and the pickup call might or might not happen in any
268           particular run
269      - this needs an overhaul for R2
270    o cleanup verification/*/code/GMREDI_OPTIONS.h
271    o cleanup testreport
272    
273    checkpoint51o_post
274    o bringing AD-related verif's up to date with genmake2
275      - carbon/
276      - global_ocean.90x40x15/
277      - hs.94.1x64x5/
278      - (front_relax/ )
279    o (more) consistent directory structure for AD-related verif.'s
280    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
281    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
282    o bug fix in find_alpha.F for MDJWF:
283      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
284        change rho -> rho-rhoConst
285      - replace call find_rho to find_rhonum
286    o initialisation of rFlx extended to full array (required by TAF)
287      and shifted to thermodynamics
288    o removed PTRACERS.h in ptracers routine
289    o added surfacetendencyPtr to S/R parameter list pracers_forcing
290    o Correcting initialisations for fVerU, fVerV.
291    o helping TAF to recognize dependency on kUp for
292      fVerU, fVerV
293    o Replacing delZ by delR in pkg/ctrl/
294    checkpoint51o_pre
295    
296    o undid all of cp51 pending some cleanups and discussion
297    o added the [#include "AD_CONFIG.h"] statement to all files that need
298       it for adjoint/tl #defines
299     o re-worked the build logic in genmake2 to support AD_CONFIG.h
300     o removed tools/genmake since it no longer works
301    
302    checkpoint51n_post
303    o modifications to make FREEZE flux visible to pkg/kpp
304      - moved surfaceTendencyTice from pkg/seaice to main code
305      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
306      - subroutine FREEZE now limits only surface temperature
307        (this means new output.txt for global_ocean.90x40x15,
308         global_ocean.cs32x15, and global_with_exf)
309    o added surface flux output variables to TIMEAVE_STATVARS
310    
311    checkpoint51n_pre
312    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
313    o added [#include "AD_CONFIG.h"] to all files that use the following
314      defines:
315      - ALLOW_ADJOINT_RUN
316      - ALLOW_TANGENTLINEAR_RUN
317      - ALLOW_ECCO_OPTIMIZATION
318    
319    checkpoint51m_post
320    o incorporating changes to get TAMC/TAF working in genmake2
321      - added new TAMC/TAF targets to the Makefile
322      - various cleanups related to package handling
323      - these changes should have no impact on the forward model
324    
325    checkpoint51l_post
326    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
327     - faster algorithm for cal_addtime.F
328     - higher precision arithmetic, where needed
329     - pkg/exf *startdate variables changed from calendar date to
330       model integration time
331    
332    checkpoint51l_pre
333    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
334    o enable to apply restoring on S & T only in a latitude band.
335    o update output (external_forcing_surf modif. change truncation errors)
336       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
337    
338    checkpoint51k_post
339    o change default to: useNHMTerms=.FALSE.
340     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
341       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
342     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
343        exp1, ideal_2D_oce
344     - change data file of oceanic exp (leave the results unchanged for now)
345       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
346    o set gravitySign automatically according to the vertical coordinate used
347      (and change sign: back to "logical" value: +1 when R increases downward)
348    o added an include barrier to the default CPP_OPTIONS.h and
349      removed the #include "PACKAGES_CONFIG.h" from it
350    o fix a bug in mom_fluxform (from chk51j_post)
351    
352    checkpoint51j_post
353    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
354    o adjusted some flow directives (dynamics, thermodynamics)
355    o added cubed-sphere case to test cost function
356    o heckpoint_lev?_directives.h now include
357      pkg-specific directives, whenever those are enabled.
358    o Moving pkg-specific flow directives to corresponding pkg
359      Moving pkg-specific differentiation list to corresponding pkg
360      Moving pkg-specific checkpoint-lev storing to corresponding pkg
361      ---> conventions are
362           - pkg_ad.flow
363           - pkg_ad_diff.list
364           - pkg_ad_check_lev?_dir.h
365    
366    checkpoint51i_post
367    o merge of the branch-genmake2
368      - knowingly breaks the older genmake
369      - automatic generation of all ALLOW_${PKG_NAME} defines
370      - new testreport supersedes older testscript
371    o large number of package inclusion and header cleanups
372    checkpoint51i_pre
373    
374    o new output for adjoin of global ocean vector invariant
375    o fix for checkpoint of thermodynamic seaice and bulk_force
376    o Steph gchem various cleanups
377    
378    checkpoint 51h_pre
379    o fixed some single quotes
380    o modify gchem pkg to be more versatile
381    o modifications to clean up dic pkg
382    o add pkg/cfc
383    
384    checkpoint51g_post
385    o provide links for ARPACK and ADM*TLM
386    o start removing verification/vero/
387    o update AD-related stuff
388      (in particular some IF-statements in model/src/ routines)
389    o adding to verification/global_ocean.90x40x15/ adjoint of
390      vector invariant setup
391    
392    checkpoint51f_post
393    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
394    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
395      of tracer Green's fucntions for ocean inversion project.
396    
397    checkpoint51f_pre
398    o Added on-the-fly spatial interpolation capability
399        "USE_EXF_INTERPOLATION" to pkg/exf.
400      - This is a temporary Cartesian-grid hack until
401        the super-duper ESMF coupler becomes available.
402      - See verification/global_with_exf/README for usage example.
403      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
404        flags and modified pkg/seaice accordingly.
405    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
406        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
407        non-local transport term.
408    
409    checkpoint51e_post
410    o pkg/mom_vecinv:
411      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
412      - add time-ave diagnostic of vorticity advection.
413    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
414    o atmospheric geopotential: - include water vapor effect;
415                                - use p^kappa in p* scaling.
416    o land pkg: read initial state from files.
417    o AIM : add stratospheric drag in the upper level
418    
419    checkpoint51d_post
420    o change function ILNBLNK (=> last non-blank char.) to return zero
421      (instead of the string length) when the string. char is empty
422    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
423    o modif's to restore TAMC compatibility
424      - avoid "_d" constructs in PARAMETER declarations
425      - avoid interrupting lines by comment lines
426    o Use cluster local disks for purely local I/O
427      vs. globally visible disks needed for ctrl stuff
428      (merged from ecco-branch)
429      - new active_file_loc... and mdsio_..._loc routines
430      - affected packages: autodiff, ctrl, grdchk, mdsio
431    
432    checkpoint51c_post
433    o introducing integer flag debugLevel
434      - debLevZero: suppress all output
435      - debLevA: standard
436      - debLevB: equivalent to current debugMode=.TRUE.
437    o introducing pathname variable mdsioLocalDir for mdsio
438      that can be specified at runtime
439      (relevant for cluster I/O to local disk)
440    `
441    >>>checkpoint51b_post
442    adjoint of ptracers
443    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
444    o extended state in checkpoint_lev?, etc.
445    o alternative ctrl/cost with tr1 or ptracer
446    o new comlev1_bibj_ptracers
447    o new ptracers.flow
448    o made ptracers_forcing same as external_forcing_s
449    o added verification for adjoint with ptracers
450      - adm. grdchk fail so far
451      - tlm. grdchk OK
452      - checked tapelev/comlev recomputations: OK
453    <<<checkpoint51b_pre
454    
455    checkpoint51a_post
456    o added code for biogeochemistry package
457      - new pkgs: dic, gchem
458      - new subroutine in ptracers
459    o modify code for biogeo packages
460      - in model/src and pkg/ptracers
461    
462    checkpoint51
463    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
464      - autodiff, ctrl, exf, grdchk, seaice
465      kept separate packages
466      - cost, ecco, obcs
467    o updating verification/internal_wave, verification/lab_sea
468      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
469    
470    checkpoint50i_post
471    o Preparing next differentiable checkpoint and sync
472      of MAIN vs. ecco-branch
473      - 1st step: this one is differentiable
474      - 2nd step: next(! not this) checkpoint will have updated packages
475                  from ecco-branch)
476    
477    checkpoint50h_post
478    o new package "land": provide surface BC for AIM.
479    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
480    o AIM: use true log-P extrapolation for near surface temp (= as in
481        F.Molteni paper) ; update aim.5l_cs output.
482    o New variable in PARM03 for more flexible pickups
483    o somewhat cleaned package initialisation sequence for
484      ctrl/ cost/ ecco/ in packages_... routines
485    
486    checkpoint50g_post
487    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
488      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
489      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
490        made the default because of faster convergence than ADI
491    
492    checkpoint50f_post
493    o exf totally restructured
494      - replaced all exf_set_ routines by one generic exf_set_gen.F
495        and made sure it's still differentiable
496      - split exf_getffields.F into new exf_bulkformulae.F
497      - exf_inscal_/exf_outscal_ suffixes consistent with field names
498      - updated adjoint/makefile and relevant verif. accordingly
499    
500    checkpoint50f_pre
501     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
502          + change Evap over land. (update aim.5l_cs output)
503     o added missing .cvsignores and made uniform across expts
504     o changed configuration of tidal_basin_2d expt
505     o added pkg/debug functions for tracing code in fatal crashes
506     o tidied pkg/monitor to use MONITOR_OPTIONS.h
507     o new fn in pkg/monitor to stop model if solution grows too big
508     o removed lots of single quotes from comments
509    
510    checkpoint50e_post
511    o make KPP work with PTRACERS
512     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
513       nearly a copy of kpp_transport_s
514     - there is no analogue to SurfaceTendencyS, so I have to use
515       gPtr(of the surface layer) instead
516    o add a new platform SunFire+mpi (SunFire 15000) to genmake
517    checkpoint50e_pre
518    
519    checkpoint50d_post
520    o change kpp output from multiple-record state files to single-record state
521      files analogous to write_state.F
522    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
523      analogous to the cg2d-related output.
524    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
525      so that writing to internal file fn (with length 512) fails.
526    checkpoint50d_pre
527    
528    checkpoint50c_post
529    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
530    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
531    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
532    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
533    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
534    
535    checkpoint50c_pre
536    Merging from release1_p13:
537    o bug fix for pkg/seaice dynamic solver
538    o Added SEAICE_initialHEFF to pkg/seaice
539    
540    checkpoint50b_post
541    o store u*,v* in gU,V instead of in guNm1,gvNm1
542    o in order to put the momForcing out of the Adams-Bashforth:
543      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
544      to timestep.F
545    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
546    o re-generate output for highly sensitive test-exp:
547       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
548    
549    checkpoint50b_pre
550    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
551    o corrected CPP option mismatch in exf_Bulk... functions for case
552      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
553    
554    checkpoint50a_post
555    o Bug fix for merging between c50 and KPP.
556      ikey was passed from thermodynamics to kpp_calc via
557      common block rather than being recomputed in kpp_calc,
558      in contradiction with new key itdkey.
559      New key ikppkey created, and tamc.h headers updated.
560    
561    checkpoint50
562    - 2nd step of merge with ecco-branch:
563      merge changes in ecco-branch back into main trunk
564    - bug fix in find_alpha
565    - more storing in gmredi_calc_tensor.F, kpp_routines.F
566    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
567    - merged some sliced AD support routines
568    
569    checkpoint49
570    merged from ecco-branch:
571    o exf:
572      - Enable initialisation of forcing fields to constant
573        (runtime) values.
574      - in exf_getffields.F
575        Reduce i-/j-loop to interior domain, discarding overlaps.
576        That also fixes wrong TAF-key computations for key_1, key_2
577        with bulf formulae.
578      - exf_init.F modify #ifdef for exf_init_evap
579      - exf_getffieldrec.F, ctrl_getrec.F
580        The following INT-usages are not safe:
581          fldsecs  = int(fldsecs/fldperiod)*fldperiod
582          fldcount = int(fldsecs/fldperiod) + 1
583        and were modified.
584    o autodiff: checkpoint_lev...
585      - updated storing for bulk formulae (some arrays were missing)
586      - added state for seaice package
587      - synchronized with main branch
588    o DIVA:
589      Modif.s in
590      - the_main_loop.F
591      - the_model_main.F
592      and added cost_final_restore.F cost_final_store.F
593      o With these changes, it is possible to fully separate
594        the first forward run to compute the cost function (mdthe_main_loop)
595        and adjoint runs over individual DIVA intervals (adthe_main_loop)
596        into separate model executions.
597        This enables better tuning of DIVA to given queue sizes.
598      o Loss of cost function value in consecutive DIVA runs is
599        fixed by storing to 'costfinal' file.
600      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
601        beginning/end of adjoint integration is accounted for.
602      The current changes apply to TAF-1.4.26.
603      TAF has one remaining bug, requiring one manual change
604      (see MITgcm manual).
605    o cal: synchronized between MAIN and ecco-branch
606    
607    checkpoint48i_post
608    o Changes to restore differentiability of code w.r.t. previous tag
609      (mostly adding new routines to make list and replacing
610      pressure by totPhiHyd).
611    o Updated and merged grdchk package
612      - has both ADM and TLM checks
613      - works for single- and multi-proc.
614      - output cleaned
615      - worked successfully for parallel DIVA
616    o genmake:
617      - Adding -platform=SP4
618      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
619    o Modif. for DIVA:
620      ctrl_unpack should not be called in intermediate DIVA interval.
621      (similar thing would apply for active files such as
622      tbar, sbar, psbar, which should not be reinitialised;
623      only relevant for ecco-branch)
624    
625    checkpoint48h_post
626    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
627    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
628    o Added SEAICE_initialHEFF to pkg/seaice
629    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
630    
631    checkpoint48g_post
632    --- EOS:
633    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
634      store total Potential in totPhyHyd for diagnostics & EOS.
635    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
636    --- Pressure/geopotential gradient:
637    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
638    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
639      ( changes results of global_ocean_pressure )
640    o NLFS + z-coord.: add eta*Rho' contribution.
641    o accurate phiHyd when using interface-W at the middle between 2 centers
642     ( changes results of ideal_2D_oce )
643    o includes r* 2nd term in potential gradient.
644    
645    checkpoint48f_post
646    Merging from release1_p12:
647    o Modifications for using pkg/exf with pkg/seaice
648      - improved description of the various forcing configurations
649      - added basic radiation bulk formulae to pkg/exf
650      - units/sign fix for evap computation in exf_getffields.F
651      - updated verification/global_with_exf/results/output.txt
652    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
653      (SBO) core products, including oceanic mass, center-of-mass,
654      angular, and bottom pressure (see pkg/sbo/README.sbo).
655    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
656      to avoid negative values in shallow regions.
657      - updated verification/natl_box/results/output.txt
658      - updated verification/lab_sea/results/output.txt
659    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
660    o Added useSingleCpuIO option (see PARAMS.h).
661    o Updated useSingleCpuIO option in mdsio_writefield.F to
662      work with multi-field files, e.g., for single-file pickup.
663    o pkg/seaice:
664      - bug fix in growth.F: QNET for no shortwave case
665      - added HeffFile for specifying initial sea-ice thickness
666      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
667    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
668      kpp_transport_t.F, forward_step.F, and the_main_loop.F
669    o pkg/seaice:
670      - adjoint-friendly modifications
671      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
672    
673    checkpoint48e_post
674    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
675    o dynamics: change definition of computational domain & adapt mom_fluxform
676      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
677    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
678        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
679        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
680        global_ocean.90x40x15 global_with_exf global_ocean_pressure
681        inverted_barometer solid-body.cs-32x32x1
682      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
683    
684    checkpoint48d_post
685    o in preparation for r*:
686     a) use pre-computed gradient of hydrostatic potential:
687        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
688     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
689        => affects results of glob_oce_pressure (different truncation error)  
690      update output.txt of ideal_2D_oce & global_ocean_pressure
691    
692    checkpoint48d_pre
693    o in preparation for r*:
694      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
695      pass the 2 comp. of the grad. as arguments to momentum S/R.
696      but for the moment, only used if it does not change the results.
697    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
698    
699    checkpoint48c_post
700    Modifications in treatment of initial flux forcing controls
701    to avoid extra storing of flux fields.
702    
703    checkpoint48c_pre
704    o Added tidal_basin_2d experiment (currently 1D!)
705    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
706    
707    checkpoint48b_post
708    o r* coordinate added in #ifdef NONLIN_FRSURF block.
709     (modification to pressure gradient not yet implemented)
710    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
711      (for U & V) that are used for vertical advection of momentum.
712    
713    checkpoint48a_post
714    o In preparation for r*, use temp. array to compute vertical transport
715       in flux-form momentum pkg. => change results of few test-exp.
716      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
717                        lab_sea, natl_box & plume_on_slope
718    
719    checkpoint48
720    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
721    
722    checkpoint47j_post
723    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
724    o moved adexch from forward_step to addummy_in_stepping
725    o added exch in ctrl_map_...
726    o aveFreq.=0. at end of cost_final to avoid overwrite in
727      reverse checkpointing loop
728    o Yet more changes in gmredi:
729      * adgmredi_calc_tensor
730        avoiding all recomputation of gmredi_slope_limit
731      * adgmredi_x/y/rtransport
732        added flag for excessive storing to avoid recomp. of
733        u/v/rtans, dTdx/y/z
734        -> this is not really necessary and very memory-consuming
735      * adgmredi_slope_psi:
736        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
737      * gmredi_slope_limit
738        re-activated full calculation of taperfct for case 'ac02'
739    o updating verification/ adjoints of carbon, global_ocean.90x40x15
740    
741    checkpoint47i_post
742    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
743    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
744      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
745    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
746    o gmredi: fix few bugs.
747    
748    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
749    This will be a good checkpoint to plug into the ecco-branch.
750    o few modif.'s to get latest version adjointed
751      (mainly kick out code in ini_linear_phisurf)
752    o modif's to run adjoint with exactConserv
753    o case GM_BOLUS_ADVEC should be cleaned
754      S/R gmredi_slope_psi should be cleaned
755    o verification/carbon now has exactConserv=.TRUE.
756    
757    checkpoint47g_post
758    o time-average AIM output: becomes independent from statvars time-average
759      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
760    o After TAF bug fix:
761      Tested adjoint of gmredi package.
762      Tests were done with checkpoint47 rather than with latest
763      checkpoint47f_post since the latter is broken for the adjoint
764      verification/carbon/ contains both ADM and TLM gradient checks.
765    Here they are, before they get changed/lost/stolen.
766    Mostly modif.'s to fix numerical sensitivities.
767    Gradient checks OK for
768    - GM_taper_scheme:
769      * clipping
770      * ac02
771      * linear
772      * glw91
773      * dm95
774      * ldd97
775    - GMREDI_OPTIONS:
776      * GM_VISBECK_VARIABLE_K
777      * GM_NON_UNITY_DIAGONAL
778      * GM_EXTRA_DIAGONAL
779      * GM_BOLUS_ADVEC
780    in conjunction with data.gmredi parameters to be checked in
781    in a few minutes under verification/carbon/code/
782    
783    checkpoint47f_post
784    Merging from release1_p10:
785    o modifications for using pkg/exf with pkg/seaice
786      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
787        and SEAICE_EXTERNAL_FLUXES
788      - pkg/exf CPP options EXF_READ_EVAP and
789        EXF_NO_BULK_COMPUTATIONS
790      - usage examples are Experiments 8 and 9 in
791        verification/lab_sea/README
792      - verification/lab_sea default experiment now uses
793        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
794    
795    checkpoint47e_post
796    o created a tag prior to creating a branch
797    
798    checkpoint47d_post
799    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
800      at the bottom boundary had an erroneous half slip boundary condition
801    o added bottom drag and no slip boundary condition capabilities to
802      oceanic pressure coordinates code
803    o added new verification experiment global_ocean_pressure, this experiment is
804      also described in the tutorial section of the manual
805    checkpoint47d_pre
806    
807    checkpoint47c_post
808    o Added a verification experiment for a global cubed-sphere ocean run
809      -  verification/global_ocean.cubed32x32x30
810      -  uses pkg/therm_seaice and pkg/bulk_forcing
811    
812    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
813    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
814      when using P-coordinate; only implemented for atmospheric config.
815    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
816      NOTES: requires option NONLIN_FRSURF to be "#define".
817    o update advect_xz/results/output.txt (left from checkpoint44g_post)
818    
819    checkpoint47b_post
820    Merging from release1_p9:
821    o pkg/seaice
822      - removed GOTO's and added taf directives
823      - double precision constants to reduce the g77 (Linux)
824        to F77 (SGI) differences reported in release1_p8
825    o tools/genmake
826      - added SGI options
827    o verification/testscript
828      - updated to that of checkpoint47a_post
829    o verification/global_ocean.90x40x15/input/eedata
830      - modified for SGI f77 compatibility
831    o verification/lab_sea
832      - added description of sea-ice model
833      - added missing matlab routines
834      - added test of thermodynamics parallelization
835    
836    checkpoint47a_post
837    o new pkg: aim_v23
838     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
839       for now, keep the same surface forcing as before.
840     - Part-Cell implemented into AIM; check that Heat & Water are conserved
841     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
842     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
843    o add diagnostic of surface correction term in monitor output
844    
845    o bulk_force and therm_seaice
846    - Two packages:  bulk_force (Bulk forcing)
847      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
848    - Earlier integration from Stephaine Dutkiewicz
849      and Patrick Heimbach.
850    - Two ifdef statements for compile time,
851       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
852    
853    checkpoint47
854    differentiable version of checkpoint46n_post
855    o bug fix in quasihydrostaticterms
856    o * "clean" adjoint code (in terms of extensive recomputations)
857        can now be obtained for all GMREDI options (i.e. for
858        - GM_VISBECK_VARIABLE_K
859        - GM_NON_UNITY_DIAGONAL
860        - GM_EXTRA_DIAGONAL
861        - GM_BOLUS_ADVEC )
862      * However, wrong gradient check problem remains unsolved.
863      * New CPP options have been introduced for different
864        tapering schemes
865    o external_fields_load now part of differentiation list
866    o pressure needs multiple storing;
867      would be nice to have store_pressure at beginning or
868      end of forward_step, e.g. by having phiHyd global (5-dim.)
869      (NB: pressure is needed for certain cases in find_rho,
870      which is also invoked through convective_adjustment).
871    o recomputations in find_rho for cases
872     'JMD95'/'UNESCO' or 'MDJWF' are OK.
873    o #define ATMOSPHERIC_LOADING should be differentiable
874    o ini_forcing shifted to begining of initialise_varia
875    o Incorporating QNVS line search routines into MITgcm
876      (this is separate code, and therefore not under pkg)
877      lsopt/, optim/
878    o Updated verification/carbon/
879      - #define GM_VISBECK_VARIABLE_K
880      - GM_taper_scheme    = 'ldd97'    
881    
882    checkpoint46n_post
883    Merging from release1_p8:
884    o verification/natl_box:
885      updating new external_fields_load routine
886    o New package: pkg/seaice
887      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
888      The sea-ice code is based on Hibler (1979-1980).
889      Two sea-ice dynamic solvers, ADI and LSR, are included.
890      In addition to computing prognostic sea-ice variables and diagnosing
891      the forcing/external data fields that drive the ocean model,
892      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
893      The implied surface heat flux is then stored in variable
894      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
895      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
896      non-local transport term.  Because this call precedes model
897      thermodynamics, temperature under sea-ice may not be "exactly" at
898      the freezing point by the time theta is dumped or time-averaged.
899      N.B.: fairly large differences in accuracy occur across
900            different platforms/compilers; comparison between
901            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
902            generated output gives:
903       T           S           U           V
904      C D M    c        m  s        m  s        m  s        m  s
905      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
906      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
907      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
908    
909      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
910    o GAD:
911      - generated new common blocks to account for call of
912        same gad routines with differing traceridentities
913        (needed to modify tracerIdentity indices in GAD.h)
914      - generated separate common blocks for case useCubedSphereExchange
915        (Department of Futurology)
916      - parameter lists to gmredi_?transport: added tracerIdentity
917      - added new key indices to tamc.h
918    o external_fields_load:
919      - added this routine to TAF list
920      - needed to make some common blocks global and additional storing
921        along the same lines as exf package (checkpoint_lev?_directives.h)
922    o exf:
923      updated external forcing package
924      - bug fixes carried over from ecco-branch
925        (missing OBCS_OPTIONS.h in two routines)
926      - enable easy to use "no forcing".
927      - added exf I/O for atmospheric loading
928      - added exf I/O for runoff data
929      - transfered scaling between exf <-> MITgcm to exf namelist
930    o Adding new verification experiment global_with_exf.
931      This verification experiment is almost identical to the
932      global_ocean.90x40x15 experiment, except that it uses
933      the exf (and cal) package instead of the
934      external_fields_load routine (cf README file).
935    
936    checkpoint46m_post
937    o modified testscript to return -- when there are no lines of "%MON" output
938    o added new flag "quasiHydrostatic" for QH mode
939      and new routine quasihydrostaticterms()
940    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
941      New routine: mom_u_coriolis_nh()
942    o fixed sign of non-hydrostatic metric terms in u and v equations.
943      Depend on correct sign of gravitySign.
944    o added work.pc* to .cvsignore in aim directories using ifc
945    o introduced flag for controllin non-hydrostatic metric terms
946    o removed gravitySign from PARM04
947    o switched to g77/ifc from pgf77 in aim experiments
948    
949    checkpoint46l_post
950    o made convective adjustment work with pressure coordinates:
951     - changed the direction of k-loop in convective_adjustment.F for the
952       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
953     - adjusted the reference pressure k-index in convective_adjustment.F
954     - adjusted the convection condition in convect.F (in analogy to
955       calc_ivdc.F)
956     - convective_adjustment no longer computes anything on the halos
957     - removed the warnings about negative salinity from find_rho.F and
958       find_alpha.F; instead the new routine look_for_neg_salinity, called
959       at the beginning of find_rho, find_alpha, and find_beta, does a
960       check of the entire slice, if CPP-option
961       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
962    checkpoint46l_pre
963    
964    checkpoint46k_post
965    o fixed the verification/global_ocean.90x40x15 experiment:
966     - new bathymetry (the world according to A., JMC, and M.)
967     - new initial fields and forcing fields (*.bin files)
968     - new POLY3.COEFFS (for the next release one should switch to a full
969       equation of state: JMD95P or MDJWF)
970     - fixed several errors and redundancies in the data file
971     - experiment uses looped cells
972     - added matlab directory with diagnostic scripts for plotting of output
973    
974    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
975     - read AIM physics parameters from a file (data.aimphys)
976     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
977    
978    checkpoint46j_post
979    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
980    o move wVel computation at the end of the time step, in S/R integr_continuity
981    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
982    o update timeave pkg for wVel diagnostic.
983    checkpoint46j_pre
984    
985    checkpoint46i_post
986    o Clean up AIM package (and keep the results unchanged):
987      include CPP_OPTION and use IMPLICT NONE in all routines ;
988      declare all the variables _RL ; use _d 0 for all numerical constants.
989      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
990    
991    checkpoint46h_post
992    o cleaned up the use of rhoNil and rhoConst.
993      - rhoNil should only appear in the LINEAR equation of state, everywhere
994        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
995        and the dynamical equations are all divided by rhoConst
996    o introduced new parameter rhoConstFresh, a reference density of fresh
997      water, to remove the fresh water flux's dependence on rhoNil. The default
998      value is 999.8 kg/m^3
999    o cleanup up external_forcing.F and external_forcing_surf.F
1000      - can now be used by both OCEANIC and OCEANICP
1001    checkpoint46h_pre
1002    
1003     Added code to convert surface volume flux (fresh water) into
1004     a mass flux when using P coordinates in the ocean (OCEANICP).
1005     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1006    
1007    checkpoint46g_post
1008    o Include a new diagnostic variable phiHydLow for the ocean model
1009      - in z-coordinates, it is the bottom pressure anomaly
1010      - in p-coordinates, it is the sea surface elevation
1011      - in both cases, these variable have global drift, reflecting the mass
1012        drift in z-coordinates and the volume drift in p-coordinates
1013      - included time averaging for phiHydLow, be aware of the drift!
1014    o depth-dependent computation of Bo_surf for pressure coordinates
1015      in the ocean (buoyancyRelation='OCEANICP')
1016      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1017        Theta, Salinity, and Pressure in the parameter list. This routine is
1018        presently contained in find_rho.F. This routine does not give the
1019        correct density for 'POLY3', which would be a z-dependent reference
1020        density.
1021    o cleaned up find_rho
1022      - removed obsolete 'eqn' from the parameter list.
1023    o added two new verification experiments: gop and goz
1024      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1025    checkpoint46g_pre
1026    
1027    checkpoint46f_post
1028    o Enable tangent linear (forward mode) gradient checks:
1029      - extended active file handling to g_... files
1030      - added TANGENT_SIMULATION to theSimulationMode
1031      - extended grdchk package accordingly
1032    o added tangent linear setup in verification/carbon/code_ftl
1033    o added adjoint setup in verification/front_relax/code_ad
1034    
1035    checkpoint46e_post
1036    o Added new equation of state -> MDJWF
1037      - EOS of McDougall et al., 2002, JAOT, submitted
1038      - caveat: the equation of state is only valid for a smaller (more
1039        realistic?) range of values than JMD95P/Z and UNESCO
1040      - added masks to the calculation of pressure in store_pressure
1041      - added more check values for density in check_eos (ini_eos.F), some of
1042        the old check values are out of the range of the MDJWF-eos, so don't
1043        expect perfect matches for those
1044    checkpoint46e_pre
1045    
1046    checkpoint46d_post
1047    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1048      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1049      case of pressure coordinates. eosType='JMD95Z' in
1050      combination with buoyancyRelation='OCEANICP' now causes an error.
1051    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1052      in find_alpha/beta.
1053    checkpoint46d_pre
1054    
1055    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1056      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1057    
1058    checkpoint46c_post
1059    o Changes necessary for ocean in p-coordinates
1060     -  Added new buoyancy relation = 'OCEANICP'
1061     -  Added new parameters = gravitySign (this used to be contained inside
1062        the factor dRdZ which I added when we first switched to R coordinates).
1063     X GM/Redi is not compatible (yet)
1064     X bottom drag and no-slip need to be debugged.
1065    checkpoint46c_pre
1066    
1067    checkpoint46b_post
1068    o Added new equation of state -> JMD95Z and JMD95P
1069      - EOS of Jackett and McDougall, 1995, JAOT
1070      - moved all EOS parameters into EOS.h
1071      - new routines ini_eos.F, store_pressure.F
1072    o Added UNESCO EOS, but not recommended because it requires
1073      in-situ temperature (see JMD95)
1074    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1075      unesco.f to be used with POLY3
1076    checkpoint46b_pre
1077    
1078    checkpoint46a_post
1079    o Added (atmospheric) pressure loading
1080      - new field in FFIELDS.h, etc...
1081      - new cpp flag ATMOSPHERIC_LOADING
1082    o Changed hFacC to _hFacC in calc_phi_hyd.F
1083    o Added SHORTWAVE_HEATING to some files for consistency
1084    checkpoint46a_pre
1085    
1086    checkpoint46
1087    further merges from release1_p5
1088    o new ctrl package
1089      - adopted from ECCO environment to enable optimization
1090      - added Eliassen Palm fluxes to controls
1091    o added Eliassen Palm flux controls to gradient check package
1092    o cost package
1093      - Compatible with new ctrl package
1094      - added Eliassen Palm cost hooks
1095      - modif's of existing cost functions
1096    o Adjoint-related bug fixes in kpp:
1097      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1098      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1099    o autodiff package
1100      - flow directives:
1101        + new for S/R do_the_model_io
1102        + enhanced for S/R checkpoint
1103        + new gmredi.flow
1104      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1105        disable adcommon.h/g_common.h by default.
1106      - fixed problem for adjoint of global_max
1107    o modified verification/carbon/
1108    o New setup for adjoint of global_ocean
1109    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1110    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1111    o incorporated hooks for sponge layer code (external_forcing.F)
1112    
1113    checkpoint45d_post
1114    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1115    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1116      (affects plume_on_slope "cg2d" output)
1117    o add new parameter deltaTfreesurf for free-surface time stepping
1118    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1119    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1120    o change phiMin in exp1 (to agree with documentation)
1121    o add new flags:
1122     - T,S forcing inside/outside Adams-Bashforth
1123     - turn off temp,salt advection and/or forcing
1124     - for each tracer, define internal flag for multiDimAdvection & A-B
1125    o monitor: change definition of KE to check conservation of Energy
1126    
1127    checkpoint45c_post
1128    o Removed f90 comments ("!")
1129    o Modified initialisations to enable exf package for MITgcm
1130      (without invoking ECCO_PACKAGE).
1131    o modifications to gradient check package (Martin Losch)
1132      - enable centered differences
1133      - modified format of standard output
1134    
1135    checkpoint45b_post
1136    o cleaned exchange calls in cg2d
1137    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1138    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1139      to configure barotropic setup (Martin Losch)
1140    o moved some initialisations within bi,bj loop in dynamics
1141      (TAF flow dependency)
1142    o in initialise_varia, moved call packages_init_variables
1143      before convective_adjustment_init
1144      (corresponding adjustment of TAF tape initialisation).
1145    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1146    
1147    checkpoint45a_post
1148    o compute Rho over the whole domain (extend iMin,jMin indices)
1149    o specific exchange for X-slice domain (case Ny=1)
1150    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1151    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1152    
1153    checkpoint44h_post = checkpoint45
1154    o Fix to restore differentiability:
1155      place at which packages_init_variables is called in
1156      initialise_varia is crucial for reverse control flow.
1157    o modifications in GMRedi to enable stable adjoint
1158      (corresponding modif's in thermodynamics, dynamics)
1159    o added missing hook for sponge layer code in external_forcing
1160    o modified test cost functions
1161    o storing in gad_advection (plus removal of write(0,*)!
1162    o missing headers TR1.h added in convective_adjustment routines
1163    o errorMessageUnit set non-equal zero in eeboot
1164      (conflict on some platforms, e.g. IBM SP3)
1165    o modified carbon verif.
1166    
1167    checkpoint44h_pre
1168    o vertical grid option: allow to put the Interface at the middle between
1169      2 cell-centers ; replace delZ in pkg/kpp by drF.
1170    o GM Advective form: Tracers are advected using the residual transport (=
1171      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1172    
1173    checkpoint44g_post
1174    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1175      results) ; ifdef missing in thermodynamics.F
1176    
1177    checkpoint44f_pre,checkpoint44f_post
1178    o added PTRACERS package
1179      This allows an arbitrary number of passive tracers to be integrated
1180      forward simultaneously with the dynamicaly model.
1181      + Implemented so far:
1182        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1183        - I/O and checkpointing
1184        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1185      + Not implemented so far:
1186        - KPP
1187        - OBCS
1188      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1189        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1190        line in data.pkg.
1191      + This package is disabled by default since it increases storage.
1192    
1193    
1194    o testscript: added -cleanup option
1195    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1196                 b) enable to filter 2D fields.
1197    
1198    checkpoint44e_pre,post
1199    o re-wrote convective adjustment to use pre-calculated weights
1200      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1201      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1202      Original calls to convect() still in place.
1203    
1204    chkpt44d_pre,post
1205    o added missing EXCLUDE_MONITOR flags
1206    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1207      (incompatible typ in MIN/MAX expressions caused problems
1208      on IBM SP3)
1209    o in genmake added variable MAKEDEPEND
1210      plus resetting for case SunOS
1211    o added timer_stats.c routine for IBM SP3
1212    o removed variables in dynamics
1213    !!! I forgot to create tag chkpt44d_pre !!!
1214    !!! But chkpt44d_pre = chkpt44c_post    !!!
1215    
1216    o real fresh water flux implemented with non-linear free-surface.
1217    
1218    chkpt44c_pre,post
1219    o few fix (mask in shap_s2, EmPmR in external_field_load,
1220      USE_NATURAL_BCS in solve_for_P);
1221    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1222    
1223    checkpoint44b_pre/_post
1224    o merge of relevant stuff from the ecco-branch:
1225      - genmake: removed $S64 overwrite for case SunOS
1226      - pkg/exf: update and corrections for field swapping and obcs
1227      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1228                  harmonized between ECCO and MITgcm
1229      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1230                      updated checkpointing_lev... lists for obcs
1231      - model/src: minor changes in forward_step, plot_field
1232                   added directive for divided adjoint in the_main_loop
1233      - pkg/mdsio: added mdsio_gl_slice
1234    
1235    o check parameters & config (chkpt44a_pre,post)
1236    o OBC and NonLin_FrSurf.
1237    
1238    checkpoint44
1239    o fix bug in mom_vi_del2uv
1240    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1241    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1242    o update AIM experiments (NCEP input files)
1243    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1244    o added some stuff for AD
1245    
1246    checkpoint43
1247    o added two new advection tests
1248    o added global 4x4 degree ocean test
1249    o added test of H&S94 with free surface on cube
1250    o some final mods for gradient check, adjoint,...
1251    
1252    checkpoint42
1253      Fixed AD-related problems:
1254    o Store directives up-to-date with re-arranged Adams-Bashforth
1255      (mainly thermodynamics.F)
1256    o New store directives for multi-dim. advection schemes
1257      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1258      * new common block and key passkey
1259      (mainly gad_advection.F)
1260    o Modified store directives for split of dynamics/thermodynamics
1261      for the case ALLOW_KPP
1262    o Cleaned argument list for timestep_tracer.F
1263    
1264    checkpoint41
1265    o re-formatted/added comments in prologues of key subroutines
1266      to work with protex
1267    
1268    checkpoint40
1269    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1270    o added FLT (floats) package from Arne along with demo. experiment
1271    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1272      implementation of forward-in-time forcing terms
1273    o more mods for non-linear free-surface including new variable
1274    o modified multi-dim method to work on cube
1275    o bug fix in KPP (from DM)
1276    
1277    checkpoint40pre9
1278    o added DST advection schemes
1279    o fix MPI bug on SGI's
1280    o modifications for non-linear free-surface
1281    o fixed conditionals for fixed flow/passive tracer only mode
1282    o added tension/strain form of stress tensor
1283    o changes to commenting of arguments for TAF/TAMC
1284    o added/updated many matlab scripts
1285    o added multi-dimensional advection method for tracers
1286      
1287    checkpoint40pre8
1288    o new package rw/
1289      Added method for dumping intermediate local arrays:
1290      mdsio_writetile - same as mdsio_writefield except works from inside
1291                        bi,bj loop
1292      mdsio_writelocal - same as mdsio_writetile except works for local
1293                         arrays
1294      write_local_r? - higher-level wrapper for mdsio_writelocal
1295      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1296      Example given at end of mom_vecinv.F that dumps some local arrays.
1297    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1298      control flux-form versus vector invariant code.
1299      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1300      or genmake -DISABLE ...
1301    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1302      (additional storing is now needed for case vecinv;
1303      currently nothing implemented to switch this storing off
1304      in case fluxform is used since no CPP flag available).
1305    
1306    checkpoint40pre7
1307    o bug fix in dynamics.F
1308      calc_viscosity called before k=1,Nr loop.
1309    o added some #ifdef's ALLOW_PASSIVE_TRACER
1310    o cleaned initialisations in ctrl_map_ini
1311      related to TAF
1312    
1313    checkpoint40pre6
1314    o split dynamics into thermodynamics & dynamics
1315    o corresponding split of calc_diffusivity into
1316      calc_diffusivity, calc_viscosity
1317      (kpp_calc_diff, kpp_calc_visc).
1318    o Added diffkr, kapgm to control variables
1319    o bug fix in gmredi_slope_limit for ldd97
1320    
1321    checkpoint40pre5
1322    o proper initialization of Adams-Bashforth time stepping
1323      + uses forward step for very first step of model (iter=0)
1324    o re-generated *all* output since almost all output is modified by this
1325      change (sorry but we've been putting this one off for about 2 years)
1326      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1327        *not* regenerated since they are already out of date and I don't
1328        want to create the impression that they are suddenly working.
1329    o removed KAP stuff for DEC's
1330    o modified/added many .cvsignore files in */code and */input
1331    o added new expt "solid-body.cs-32x32x1"
1332      + this uses an alternative form of ini_curvilinear_grid.F which
1333        is not necessarily any better than the current one...
1334    
1335    checkpoint40pre4
1336    o added re-initialisations of utrans,vtrans,rtrans in
1337      calc_common_factors which are crucial for TAF.
1338    o extended iMin,jMin range for calc_common_factors,
1339      calc_diffusivity
1340    o added option ALLOW_PASSIVE_TRACER
1341    o a few minor updates and fixes
1342    
1343    checkpoint40pre3
1344    o created calc_gtr1.F for gad package
1345    o split the_main_loop and re-introduced forward_step
1346    o some recomputations of nIter0 for TAMC
1347    
1348    checkpoint40pre2
1349    o Updated to latest branch of AJA, JMC
1350    o Added gradient check package
1351    o Added routines for passive tracer handling
1352    o Added carbon sequestration sensitivity experiment
1353    
1354    checkpoint39
1355     o Modifications and fixes to support TAMC
1356       (mainly missing or wrong directives)
1357     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1358       in addummy_in_stepping
1359     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1360     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1361     o Included following packages:
1362       cal: calendar
1363       exf: external forcing
1364       ecco: essential routines to control use of cal, exf
1365             (NB: this is not the full ECCO environment)
1366     o disabled some packages by default in genmake
1367    
1368    checkpoint38
1369     o see notes_c37_adj.txt
1370     o corrected wrong layer index in external_forcing_t
1371     o replaced the_main_loop/forward_step by the_main_loop
1372     o removed forceoutput from write_state
1373       (replaced criteria for initial/final state)
1374     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1375    
1376    checkpoint37
1377     o mdsio.F routine split and packaged in pkg/mdsio
1378       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1379        used unless genmake -disable=mdsio)
1380     o allow a more precise surface-geopotential gradient for the atmosphere
1381       taking into account the change in space of Alpha (=1/rho) at the surface.
1382     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1383       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1384     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1385       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1386       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1387     o Time-Average diagnostics defined as a pseudo package "timeave".
1388     o pickup files : old pickup (before c35) did not work with new code (c35
1389       and after) unless activating 2 commented lines in initialise-varia.
1390     o Non-Hydrostatic pickup file Pb fixed.
1391     o bug with Rigid-lid version (since c35) fixed.  
1392    
1393    checkpoint36
1394     o implement Crank-Nickelson barotropic time-stepping
1395     o recover Time-Average diagnostics
1396     o fix Pb in checkpoint (PR#19)
1397     o AIM become a standard package ; clean unused CPP_kees
1398    
1399    checkpoint35
1400     o subtantial rewrite of dynamics.f
1401     o allows staggered time-stepping
1402     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1403     o added bottom drag (linear + quadratic)
1404    
1405    checkpoint34
1406     o Modified exchange routines for correct reverse simulation.
1407     o Added verification output to comply with bug fix in impldiff.F
1408       as of c33 (exp2, natl_box).
1409     o Corrected store directives in dynamics.F
1410     o Corrected array boundaries in impldiff.F
1411     o Corrected array dimensions in gmredi.
1412       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1413     o Added routine GLOBAL_SUM_INT to global_sum.F
1414     o Added mdsio_gl.F for ECCO purposes.
1415    
1416    checkpoint33
1417     o Fixed bug in lower BC in impldiff.F
1418     o Fixed confusion about units of forcing arrays in FFIELDS.h
1419       namely Fu,Fv,Qnet,Qsw,EmPmR:
1420       - Removed verification/natl_box/code/external_fields_scale.F
1421         (did not differ from that in model/src)
1422       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1423         (see FFIELDS.h for description)
1424       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1425         kpp_calc.F and kpp_transport_t.F
1426       - Removed model/src/external_fields_scale.F and calls to it
1427       - verification/natl_box uses flux data with "atmospheric" sign so
1428         a special version of external_fields_load.F is used to
1429         change the data as it's read in. This way, the arrays
1430         have the right units and signs at all times tha a user could
1431         possibly use them.
1432     o Corrected genmake to delete a temporary file during configuration
1433    
1434    checkpoint32
1435     o Scaling of forcing fields moved from external_forcing.F to
1436       external_fields_scale.F, called directly after loading fields.
1437     o Surface relaxation terms added to surface tendency fields in
1438       extra subroutine.
1439     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1440       fields.
1441     o Changes in GMRedi to comply with packaging structure.
1442     o Modifications and bug fixes in KPP package.
1443     o Verification experiment for KPP added (verification/nat_box/)
1444    
1445    checkpoint31
1446     o Packages interface brought in line with defined standard
1447       -> new routines packages_...F
1448       -> changes in initialise_fixed.F, initialise_varia.F
1449       -> enables initialisation interface for ECCO package
1450     o Rescaling of external forcing fields immediately after read
1451       (removed from external_forcing.F)
1452       -> new: surface_fields_scale.F
1453       -> affects ini_foorcing.F, external_fields_load.F
1454     o Computation of surface tendencies before tendency updates.
1455       -> new: external_forcing_surf.F
1456     o Change of variable names useGMRedi, useKPP, useECCO
1457     o Further changes in dynamics.F, impldiff.F for TAMC
1458     o Tested for experiments 0, 2, 4.
1459       - not yet tested for GMRedi.
1460       - not yet tested for KPP.
1461    
1462    checkpoint30
1463     o Updates for OBCs
1464     o New experiment for test OBCs (internal_wave)
1465     o New output.txt in verification/exp4/results/
1466     o Updates for KPP: calculation of viscosity corrected, new variables
1467       kpp_dumpFreq and kpp_taveFreq
1468     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1469       and entry for T90 in genmake
1470    
1471    checkpoint29
1472     o packaged KPP and GM/Redi
1473    
1474    checkpoint28
1475     o Corrected initialization of hFacMin for difference vertical coordinates
1476     o Modified calculation of partial cell thickness to more robust algorithm
1477     o config_summary.F: replaced write_1D_... by write_0D_...
1478       read_write.F: added subroutines write_0D_...
1479     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1480       included some initialisations required for TAMC.
1481     o routine calc_isoslopes: modified sqrt computation to make it
1482       differentiable for zero argument.
1483     o routines dynamics, impldiff:
1484       included store directives and tape key computations required for TAMC.
1485     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1486    
1487    checkpoint27
1488     o fixed calc_isoslopes() to so that cancellation of terms in tensor
1489       formulation works properly with variable resolution.
1490     o restructured the calling tree between the_model_main() and dynamics()
1491     o split initialise() into initialise_fixed() and initialise_varia()
1492     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
1493       in new routine ini_psurf()
1494    
1495    checkpoint26
1496     o moved some #ifdef in optional routines to encompass everything
1497       except the argument declarations. This was using up some memory.
1498     o fixed macros like _ADT to work with both versions of Linux cpp
1499     o cleaned up some unused and uninitialized variables
1500       (helps when debugging with strict compile options)
1501     o split up CPP_EEOPTIONS.h into options and macros
1502       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1503     o patch for 2 processor JAM mode
1504    
1505    checkpoint25
1506     o updates for OBCs and NH
1507     o dramatically reduced memory usage
1508     o added "JAM" routines for use on Artic network
1509     o parameterization of convection by implicit vertical diffusion
1510     o added a diagnostic of convective index
1511     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1512       (this is was partly for OBCs and NH but also in anticipation of
1513        an explicit free-surface option)
1514     o initial state input files for U and V
1515    
1516    checkpoint24
1517     o Removed some spurious "REAL"s
1518     o Updated KPP to latest version from JPL
1519     o Added a COS(latitude) in horizontal viscosity
1520    
1521    checkpoint23
1522     o Added del^4 diffusion for salt and temperature
1523     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1524    
1525    checkpoint22
1526     o Made many small changes: implicit none, format(i5), etc...
1527     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1528    
1529    checkpoint21
1530     o Introduced new I/O package that supports direct-access records (mdsio.F)
1531     o Split-up mid-level I/O routines
1532     o Updated input data for experiments 0,1,2,4 and 5
1533     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1534    
1535    checkpoint20
1536     o Tidied up open-boundaries some more
1537     o Added non-hydrostatic code
1538     o Fixed some input data
1539     o Modified MPI start-up to work in "coupled" context.
1540    
1541    checkpoint19
1542     o Tidied up directory structure for verification experiments.
1543     o Added new code for open boundaries.
1544     o Corrected advective terms near boundaries.
1545     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1546     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1547     o Split default parameters out of ini_parms.F into set_defaults.F.
1548    
1549    checkpoint18
1550     o Further changes for optional code generation with
1551       CPP - ugh!
1552    
1553    checkpoint17
1554     o Beginning to incorporating modularity
1555       for supporting atmos. and ocean configs.
1556     o Small changes for TAMC complinace
1557     o New ultra simple test case. Barotropic box
1558       configuration "exp0".
1559    
1560    checkpoint16
1561     o Minor changes to exchange routines to support
1562       accumulation in reverse mode. Adjoint of an
1563       assignment is an addition.
1564     o Changes to support compilation by TAMC (LR(1)
1565       syntax) and by g77 under Linux ( 72 character
1566       limit ).
1567    
1568    checkpoint15
1569     Rewrote exchange routines to allow
1570     o General tile <-> tile connectivity.
1571     o TAMC reverse mode flag ( is this really needed? )
1572     o Variable width overlap and exchange region widths.
1573     o Hooks for sharing data via DMA, Arctic, Memory Channel,
1574       shmput/shmget, VIA, SYSV shmem and every other cool
1575       communication method.
1576    
1577    checkpoint14
1578     Consistent isomorphism chages made. These allow dynamical core
1579     to support both pressure and meters as a vertical coordinate.
1580    
1581    checkpoint13
1582     Release which corrects global_max problem and a couple
1583     of KGM time-averaging diagnostic errors. Also contains
1584     a double-gyre experiment setup as well as the baseline
1585     4 degree global template. The double gyre template is
1586     organised to allow it to be applied automatically to
1587     the baseline configuration.
1588    
1589    branch-point-rdot
1590     A few tidy-ups have been made bt the real point of this
1591     check-point (excuse the pun) is to allow a branch to be
1592     made for the purposes of adding the rDot alterations.
1593     I don't want to commit the rDot to the main-trunk until
1594     we've actually tested it...
1595    
1596    checkpoint12
1597     Tidy up and added generic genmake script (formerly
1598     configure script).
1599     Released to testers.
1600    
1601    checkpoint11
1602     Re-arranged initialise() and introduced ini_vertical_grid()
1603     and ini_masks_etc().
1604    
1605    checkpoint10
1606     Introduced the configure script.
1607     Separated out the diags package.
1608     Added template for writing time-averages of tile/intermediate quantities.
1609     Updated SIZE.h in exp2 and made the data big-endian.
1610    
1611    checkpoint9
1612     MPI fix. Filename changes (meta/data). salbin*y stuff.
1613     General tidy-up.
1614     SST.bin SSS.bin added to verification/exp2
1615    
1616    checkpoint8
1617     Inludes time-dependant forcing and time-averaging.
1618     Works at 4x4 and 2.8125x2.8125 global
1619    
1620    checkpoint7-4degree-ref
1621     Branch from checkpoint7. Released for application to
1622     global modeling and general modeling - process studies, regional
1623     model etc..
1624     Configured for verification/exp2 - 4 degree global, two process.
1625    
1626    checkpoint7
1627     Created by cnh
1628     Simple 4 degree global simulation
1629     configuration.
1630     Includes climatological wind,
1631     hydrography, bathymetry etc
1632     Does not include Heat Flux and E-P
1633    
1634  checkpoint6  checkpoint6
1635   Created by cnh   Created by cnh

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