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revision 1.4 by cnh, Mon Jun 8 22:38:51 1998 UTC revision 1.291 by dimitri, Wed May 12 18:45:44 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint53a_post
7    o restore TAMC compatiility for exf_constants.h
8      (no usage of _d in .h)
9    o Additional storing in KPP in an attempt to fix
10      TAMC problem with adjoint of KPP code.
11      (no success...)
12      Identical code works fine with TAF.
13    o Fixed verification/natl_box_adjoint experiments.
14      Initial conditions for Experiments 4 and 5 are now
15      set to "SEAICE_initialHEFF=0", which is more reasonable,
16      and hence gives results closer to that of Experiment 2.
17      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
18    
19    checkpoint53
20    o stable checkpoint with up to date adjoint
21      TLM tests only run for 1st grdchk at the moment. Its unclear if
22      this is a code problem or a problem with resetting code for g_
23      variables that is being autogenerated wrong.
24      Otherwise:
25       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
26       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
27         are both still in chaos following their security messes.
28    
29    checkpoint52n_post
30    o various build (mostly genmake2) changes including:
31      - ability to build/run more easily within Cygwin and MacOS X
32      - more complicated Makefiles with a stronger dependence on Gnu Make
33    o pkg/seaice modifications
34      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
35        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
36        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
37      - changed proxy for geostrophic velocity and updated
38        verification/lab_sea/results/* accordingly
39      - removed ADI dynamic solver from pkg/seaice
40      - replaced all occurrences of 1/CSTICE or 1/CSUICE
41        they caused a segmentation fault under certain circumstances
42      - removed unused field WATR
43    o bug fix in exf-package:
44      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
45         now reflect that.
46    o small fixes in the cal-package:
47      - set reference date to first of January for the 'model'-calendar
48      - failing of cal_CheckDate in cal_FullDate now actually results in a
49        warning
50    o small modifications in exf-package to increase flexibility:
51      - change climtempfreeze from a constant to a runtime parameter that
52        is specified in data.exf_clim (default = -1.9)
53      - introduce runtime parameter windstressmax (default = 2.0) that is
54        specified in data.exf
55    o fix in pkg/thsice:
56      - update Evap (Tsf changes) to be consistent with Latent heat flux
57      - maintain snow precipitation unchanged (even if Tsf >=0).
58     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
59    
60    checkpoint52m_post
61    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
62      this does not change any of the results, because myIter=0 in swfrac always
63      lead to jwtype=2 (the default anyway), but the call makes little sense
64      as a default
65    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
66    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
67      atmospheric model (AIM) to use it ; add a "slab ocean" component.
68    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
69    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
70    o extending useSingleCpuIO option to work with new exch2 I/O format
71      - old-style, missing-tile I/O is still accessible by defining CPP
72        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
73    o monitor package can write to NetCDF files and/or STDOUT
74    o fix re-definition bug in MNC_GRID_INIT_ALL()
75    o doc/api_reference added
76      - a framework for building an API Reference Manual using all
77        the "protex" comments embedded in the code
78      - see pkg/generic_advdiff, pkg/mnc for examples
79    o MNC:
80      - make myThid the last argument for all subroutines
81      - new default for the grid files: NO halos
82      - add useMNC and other run-time flags
83      - separate per-file-group handling of the unlimited dimension
84      - early initialization of MNC w/ flags read at the eeboot stage
85        and lookup tables set in initialize_fixed
86      - write all MNC output to a freshly-created directory
87    o thermodynamics sea-ice (thsice) is now tested with testreport.
88    o test exp. advect_cs: use the standard cs32 grid ; update output.
89    o Added functionality to grdchk:
90      pick global i,j,k position (or nearest wet) where to perform check.
91    
92    checkpoint52l_post
93    o new land formulation:
94      a) use ground enthalpy as prognostic variable to ensure exact
95         energy conservation.
96      b) account for water temperature and for latent heat of freezing
97         in all processes (rain, run-off, ground storage)
98      c) compute surface and ground temperature implicitly.
99    o aim_v23 modification for new land model:
100      a) Treat separately land / ocean / sea-ice surface fluxes
101         to allow implicit computation of land & sea-ice surface temp.
102      b) add snow precipitation.
103    checkpoint52l_pre
104    
105    o fix problem (when 1 tile is empty) in min/max monitor.
106    o fix bug in timeAve (u,vZetatave in common block)
107    o no restoring terms under ice for pkg/seaice
108    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
109    o bug fix for pkg/seaice pickups
110    o change MNC call locations and add coordinate attributes
111    o mask vorticity at the corner ; affects global_ocean.cs output
112    o fix ini_curvilinear_grid ; test CS experiments with mpi
113    o aim.5l_cs: modify sea-ice fraction input file ; update output
114    o exf: Adding simple range check routine for exf fields after read
115    
116    checkpoint52k_post
117    o removed top-level directory "diags"
118      - we migrated these functions to pkg/timeave a long time ago
119    o fixed bug introduced in pkg/monitor
120    o accuracy ctrlprec = 32 insuffient for gradient checks using
121      averaged fields (I/O via cost_averages)
122      -> use ctrl.h in active_file*.F to control I/O precision.
123    o paramter list of CALL ADTHE_MAIN_LOOP
124    o added initial do_the_model_io to ecco
125    o set all ...Freq to zero after cost_final
126      taveFreq, dumpFreq, pChkptFreq
127    o MAIN and ECCO differentiability restored
128    
129    checkpoint52j_post
130    o fix nchklev in tamc.h for global_ocean...
131    o Bringing flow and store directives up-to-date
132    o Really weird thing!
133      call do_the_model_io from the_main_loop with parameters
134      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
135      TAF places a faulty re-call of initialise_varia
136      after cost_final call which should not be there!
137    checkpoint52j_pre
138    
139    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
140      error messages
141    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
142    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
143      debug output
144    o modfied mdsio_writefield.F to handle non-global files under exch2
145    o update AIM Cubed-Sphere exp (aim.5l_cs):
146      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
147    o update AIM Equatorial Channel exp:
148      use standard aim_v23 pkg and change the SST fields to be more realistic.
149    o globalFile now works with exch2
150    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
151      mon_vort3.F to make exch2 friendly with >1 tile per cube face
152    o limit timeave output for hi-res integrations
153    
154    checkpoint52i_post
155    o removed CPP_EEOPTIONS.h from verification/*/code
156    o updated the tiling for global_ocean_pressure
157    checkpoint52i_pre
158    
159    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
160      the old pkg/aim).
161    
162    checkpoint52h_pre
163    o shortened offending lines in exch2_send_rx?.template
164    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
165    o genmake2: add build & execute test for NetCDF code
166    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
167      old grid files, moved CPP_EEMACROS.h to pkg/exch2
168    o added useSingleCPUIO flag to monitor.F and mon_out.F
169    o added temporary hack for sea-ice dynamics on the cube:
170      metric terms are ignored and it is assumed that
171      there is no sea-ice on cube faces 1, 2, 4, and 5.
172    
173    checkpoint52f_post
174    o added exch2 cube routines to pkg/exch2
175    o modified hs94.cs-32x32x5 to use it
176    o added new grid files to hs94.cs-32x32x5
177    checkpoint52f_pre
178    
179    checkpoint52e_post
180    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
181      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
182    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
183      to work with implicit vertical advection and AB ;
184    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
185    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
186     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
187    checkpoint52e_pre
188    
189    o fix bug in impldiff when Nr=1 or Nr=2.
190    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
191    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
192    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
193      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
194    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
195    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
196    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
197    
198    checkpoint52d_post
199    o re-tiled many expts to allow comparison in multi-processor mode
200      - updated output accordingly
201      - changed hs94.128x64x5 to use intial T from file rather than use the
202        random number generator
203    o add infrastructure in model routines for fizhi and gridalt packages
204    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
205    o changes to permit hi-res, cubed-sphere, configuration
206      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
207      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
208      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
209        of surface winds for the cube
210      (A verification experiment, based on global_ocean.cs32x15, but with
211       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
212       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
213       complete with example surface forcing files and matlab scripts to look
214       at the output and compare it with that of global_ocean.cs32x15.)
215    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
216       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
217       to conform to the common rule.
218    o check-in the first version of the coupler + interfaces for multi-components
219       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
220       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
221       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
222       - ocean and atmos. share the same horizontal grid (no interpolation).
223       - exchanges between component and coupler is done in forward_step
224    o new verification experiment, cpl_aim+ocn:
225       coupled ocean - AIM atmosphere on cs32 grid.
226    
227    checkpoint52d_pre
228    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
229    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
230    
231    checkpoint52c_post
232    o Fixing OPTIONS files for use of exf:
233      - ALLOW_ECCO not needed
234      - ECCO_CPPOPTIONS.h should not be included from
235        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
236        as has been the case in the past
237      - All cal/exf related options are currently set in
238        single header file. Should remain so until we
239        agree on a consistent new policy.
240    o Removed all CPP options for cal package.
241      cal has no more CPP options.
242    o modified STOREs in GAD_ADVECTION
243    o corrected key comp. for passkey
244    
245    checkpoint52b_post
246    o new version: "thsice" of thermodynamic sea-ice pkg:
247     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
248     - modify fluxes but do not change theta directly;
249     - light cleaning of bulk_force pkg (still needed with thsice).
250     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
251       + output_thsice.txt to test thsice & bulk_force pkgs.
252    o put back grid & coriolis monitor output.
253    checkpoint52b_pre
254    
255    o call "do_the_model_io" at the beginning (=> dump initial state)
256    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
257    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
258      (need info on NUMBER_OF_PTRACERS)
259    o missing PTRACERS headers in some routines
260    o default tamc.h in pkg/autodiff supposed to crash
261      to ensure proper customization
262    
263    checkpoint52a_post
264    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
265      - moved surfaceTendencyTice from pkg/seaice to main code
266      - subroutine FREEZE_SURFACE now limits only surface temperature
267        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
268        => new output.txt for global_ocean.cs32x15 & global_with_exf
269      - keep the old version of FREEZE for backward compatibility;
270        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
271      - corresponding modifs for TAF directives
272    o added surface flux output variables to TIMEAVE_STATVARS
273    o time-averaged output for pkg/ptracers
274    o fix problem with ECCO-related divided adjoint
275      snapshot file was missing some ad-variables,
276      but no warning issued by TAF
277    
278    checkpoint52a_pre
279    o some bug fixes for #undef REAL4_IS_SLOW
280    
281    checkpoint52 = ecco_c52_e35
282    o after testing adjoints of checkpoint51u_post
283    
284    checkpoint51u_post
285    o this is the post-merge tag of the ecco-branch
286      (needs another clean checkout and re-testing)
287    o various natl_box_adjoint configs and results
288      but no input fields
289    o obcs adjoint not yet merged!
290    o adding ECCO global 1x1 and 2x2 degree configs
291    o updated/extended some store directives for seaice
292    o pkg/ecco now containes ecco-specific part of cost function
293    o top level routines the_main_loop, forward_step
294      supersede those in model/src/
295      previous input data.cost now in data.ecco
296      (new namelist ecco_cost_nml)
297    o in ctrl/ cleaned some cross-dependencies and updated CPP options
298    
299    checkpoint51t_post
300    o this is the pre-merge tag of the ecco-branch
301    
302    checkpoint51s_post
303    o cleanup: removed various obsolete #define-s
304    o pkg/grdchk
305      - renamed 'ph-grd 3' to 'grad-res'
306      - merged from ecco-branch
307        (remaining bug fixes for obcs gradient checks)
308      - additional high-precision output for testreport
309        (grep for 'precision_grdchk_result')
310    
311    checkpoint51r_post
312    o cleaned up or removed CPP_OPTIONS.h files
313    o updated results for some of the tests to reflect the new
314      optfiles (-ieee: -O0 instead of -O3)
315    
316    checkpoint51q_post
317    o cd_code:
318      - moved cd_scheme.F -> cd_code_scheme.F
319      - separate read_checkpoint from cd_code_ini_vars.F
320      - separated cd_code part from write_checkpoint
321      - updated AD_SOURCE, generated .flow
322      - added CD_CODE_VARS.h to the_main_loop
323      - Moving cd_code specific store dir.s to pkg/cd_code
324    o ctrl package totally restructured
325      - pack/unpack now optional and decoupled from
326        xx_/adxx_ I/O
327      - ctrl_pack/unpack cleaned
328        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
329      - confined inclusion of AD_CONFIG.h to where necessary.
330    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
331    
332    checkpoint51p_post
333    o create initial cd_code package
334      - WARNING: the initialization of fields within packages
335        is broken because INI_FIELDS (where READ_CHECKPOINT is
336        called) is called *before* PACKAGES_INIT_VARIABLES.
337        This seems to be backwards since
338        1) its important to initially zero the entire field including
339           the "halo" region
340        2) zeroing needs to be done *before* reading pickup info
341           and the pickup call might or might not happen in any
342           particular run
343      - this needs an overhaul for R2
344    o cleanup verification/*/code/GMREDI_OPTIONS.h
345    o cleanup testreport
346    
347    checkpoint51o_post
348    o bringing AD-related verif's up to date with genmake2
349      - carbon/
350      - global_ocean.90x40x15/
351      - hs.94.1x64x5/
352      - (front_relax/ )
353    o (more) consistent directory structure for AD-related verif.'s
354    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
355    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
356    o bug fix in find_alpha.F for MDJWF:
357      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
358        change rho -> rho-rhoConst
359      - replace call find_rho to find_rhonum
360    o initialisation of rFlx extended to full array (required by TAF)
361      and shifted to thermodynamics
362    o removed PTRACERS.h in ptracers routine
363    o added surfacetendencyPtr to S/R parameter list pracers_forcing
364    o Correcting initialisations for fVerU, fVerV.
365    o helping TAF to recognize dependency on kUp for
366      fVerU, fVerV
367    o Replacing delZ by delR in pkg/ctrl/
368    checkpoint51o_pre
369    
370    o undid all of cp51 pending some cleanups and discussion
371    o added the [#include "AD_CONFIG.h"] statement to all files that need
372       it for adjoint/tl #defines
373     o re-worked the build logic in genmake2 to support AD_CONFIG.h
374     o removed tools/genmake since it no longer works
375    
376    checkpoint51n_post
377    o modifications to make FREEZE flux visible to pkg/kpp
378      - moved surfaceTendencyTice from pkg/seaice to main code
379      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
380      - subroutine FREEZE now limits only surface temperature
381        (this means new output.txt for global_ocean.90x40x15,
382         global_ocean.cs32x15, and global_with_exf)
383    o added surface flux output variables to TIMEAVE_STATVARS
384    
385    checkpoint51n_pre
386    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
387    o added [#include "AD_CONFIG.h"] to all files that use the following
388      defines:
389      - ALLOW_ADJOINT_RUN
390      - ALLOW_TANGENTLINEAR_RUN
391      - ALLOW_ECCO_OPTIMIZATION
392    
393    checkpoint51m_post
394    o incorporating changes to get TAMC/TAF working in genmake2
395      - added new TAMC/TAF targets to the Makefile
396      - various cleanups related to package handling
397      - these changes should have no impact on the forward model
398    
399    checkpoint51l_post
400    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
401     - faster algorithm for cal_addtime.F
402     - higher precision arithmetic, where needed
403     - pkg/exf *startdate variables changed from calendar date to
404       model integration time
405    
406    checkpoint51l_pre
407    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
408    o enable to apply restoring on S & T only in a latitude band.
409    o update output (external_forcing_surf modif. change truncation errors)
410       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
411    
412    checkpoint51k_post
413    o change default to: useNHMTerms=.FALSE.
414     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
415       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
416     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
417        exp1, ideal_2D_oce
418     - change data file of oceanic exp (leave the results unchanged for now)
419       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
420    o set gravitySign automatically according to the vertical coordinate used
421      (and change sign: back to "logical" value: +1 when R increases downward)
422    o added an include barrier to the default CPP_OPTIONS.h and
423      removed the #include "PACKAGES_CONFIG.h" from it
424    o fix a bug in mom_fluxform (from chk51j_post)
425    
426    checkpoint51j_post
427    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
428    o adjusted some flow directives (dynamics, thermodynamics)
429    o added cubed-sphere case to test cost function
430    o heckpoint_lev?_directives.h now include
431      pkg-specific directives, whenever those are enabled.
432    o Moving pkg-specific flow directives to corresponding pkg
433      Moving pkg-specific differentiation list to corresponding pkg
434      Moving pkg-specific checkpoint-lev storing to corresponding pkg
435      ---> conventions are
436           - pkg_ad.flow
437           - pkg_ad_diff.list
438           - pkg_ad_check_lev?_dir.h
439    
440    checkpoint51i_post
441    o merge of the branch-genmake2
442      - knowingly breaks the older genmake
443      - automatic generation of all ALLOW_${PKG_NAME} defines
444      - new testreport supersedes older testscript
445    o large number of package inclusion and header cleanups
446    checkpoint51i_pre
447    
448    o new output for adjoin of global ocean vector invariant
449    o fix for checkpoint of thermodynamic seaice and bulk_force
450    o Steph gchem various cleanups
451    
452    checkpoint 51h_pre
453    o fixed some single quotes
454    o modify gchem pkg to be more versatile
455    o modifications to clean up dic pkg
456    o add pkg/cfc
457    
458    checkpoint51g_post
459    o provide links for ARPACK and ADM*TLM
460    o start removing verification/vero/
461    o update AD-related stuff
462      (in particular some IF-statements in model/src/ routines)
463    o adding to verification/global_ocean.90x40x15/ adjoint of
464      vector invariant setup
465    
466    checkpoint51f_post
467    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
468    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
469      of tracer Green's fucntions for ocean inversion project.
470    
471    checkpoint51f_pre
472    o Added on-the-fly spatial interpolation capability
473        "USE_EXF_INTERPOLATION" to pkg/exf.
474      - This is a temporary Cartesian-grid hack until
475        the super-duper ESMF coupler becomes available.
476      - See verification/global_with_exf/README for usage example.
477      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
478        flags and modified pkg/seaice accordingly.
479    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
480        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
481        non-local transport term.
482    
483    checkpoint51e_post
484    o pkg/mom_vecinv:
485      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
486      - add time-ave diagnostic of vorticity advection.
487    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
488    o atmospheric geopotential: - include water vapor effect;
489                                - use p^kappa in p* scaling.
490    o land pkg: read initial state from files.
491    o AIM : add stratospheric drag in the upper level
492    
493    checkpoint51d_post
494    o change function ILNBLNK (=> last non-blank char.) to return zero
495      (instead of the string length) when the string. char is empty
496    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
497    o modif's to restore TAMC compatibility
498      - avoid "_d" constructs in PARAMETER declarations
499      - avoid interrupting lines by comment lines
500    o Use cluster local disks for purely local I/O
501      vs. globally visible disks needed for ctrl stuff
502      (merged from ecco-branch)
503      - new active_file_loc... and mdsio_..._loc routines
504      - affected packages: autodiff, ctrl, grdchk, mdsio
505    
506    checkpoint51c_post
507    o introducing integer flag debugLevel
508      - debLevZero: suppress all output
509      - debLevA: standard
510      - debLevB: equivalent to current debugMode=.TRUE.
511    o introducing pathname variable mdsioLocalDir for mdsio
512      that can be specified at runtime
513      (relevant for cluster I/O to local disk)
514    `
515    >>>checkpoint51b_post
516    adjoint of ptracers
517    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
518    o extended state in checkpoint_lev?, etc.
519    o alternative ctrl/cost with tr1 or ptracer
520    o new comlev1_bibj_ptracers
521    o new ptracers.flow
522    o made ptracers_forcing same as external_forcing_s
523    o added verification for adjoint with ptracers
524      - adm. grdchk fail so far
525      - tlm. grdchk OK
526      - checked tapelev/comlev recomputations: OK
527    <<<checkpoint51b_pre
528    
529    checkpoint51a_post
530    o added code for biogeochemistry package
531      - new pkgs: dic, gchem
532      - new subroutine in ptracers
533    o modify code for biogeo packages
534      - in model/src and pkg/ptracers
535    
536    checkpoint51
537    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
538      - autodiff, ctrl, exf, grdchk, seaice
539      kept separate packages
540      - cost, ecco, obcs
541    o updating verification/internal_wave, verification/lab_sea
542      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
543    
544    checkpoint50i_post
545    o Preparing next differentiable checkpoint and sync
546      of MAIN vs. ecco-branch
547      - 1st step: this one is differentiable
548      - 2nd step: next(! not this) checkpoint will have updated packages
549                  from ecco-branch)
550    
551    checkpoint50h_post
552    o new package "land": provide surface BC for AIM.
553    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
554    o AIM: use true log-P extrapolation for near surface temp (= as in
555        F.Molteni paper) ; update aim.5l_cs output.
556    o New variable in PARM03 for more flexible pickups
557    o somewhat cleaned package initialisation sequence for
558      ctrl/ cost/ ecco/ in packages_... routines
559    
560    checkpoint50g_post
561    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
562      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
563      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
564        made the default because of faster convergence than ADI
565    
566    checkpoint50f_post
567    o exf totally restructured
568      - replaced all exf_set_ routines by one generic exf_set_gen.F
569        and made sure it's still differentiable
570      - split exf_getffields.F into new exf_bulkformulae.F
571      - exf_inscal_/exf_outscal_ suffixes consistent with field names
572      - updated adjoint/makefile and relevant verif. accordingly
573    
574    checkpoint50f_pre
575     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
576          + change Evap over land. (update aim.5l_cs output)
577     o added missing .cvsignores and made uniform across expts
578     o changed configuration of tidal_basin_2d expt
579     o added pkg/debug functions for tracing code in fatal crashes
580     o tidied pkg/monitor to use MONITOR_OPTIONS.h
581     o new fn in pkg/monitor to stop model if solution grows too big
582     o removed lots of single quotes from comments
583    
584    checkpoint50e_post
585    o make KPP work with PTRACERS
586     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
587       nearly a copy of kpp_transport_s
588     - there is no analogue to SurfaceTendencyS, so I have to use
589       gPtr(of the surface layer) instead
590    o add a new platform SunFire+mpi (SunFire 15000) to genmake
591    checkpoint50e_pre
592    
593    checkpoint50d_post
594    o change kpp output from multiple-record state files to single-record state
595      files analogous to write_state.F
596    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
597      analogous to the cg2d-related output.
598    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
599      so that writing to internal file fn (with length 512) fails.
600    checkpoint50d_pre
601    
602    checkpoint50c_post
603    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
604    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
605    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
606    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
607    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
608    
609    checkpoint50c_pre
610    Merging from release1_p13:
611    o bug fix for pkg/seaice dynamic solver
612    o Added SEAICE_initialHEFF to pkg/seaice
613    
614    checkpoint50b_post
615    o store u*,v* in gU,V instead of in guNm1,gvNm1
616    o in order to put the momForcing out of the Adams-Bashforth:
617      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
618      to timestep.F
619    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
620    o re-generate output for highly sensitive test-exp:
621       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
622    
623    checkpoint50b_pre
624    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
625    o corrected CPP option mismatch in exf_Bulk... functions for case
626      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
627    
628    checkpoint50a_post
629    o Bug fix for merging between c50 and KPP.
630      ikey was passed from thermodynamics to kpp_calc via
631      common block rather than being recomputed in kpp_calc,
632      in contradiction with new key itdkey.
633      New key ikppkey created, and tamc.h headers updated.
634    
635    checkpoint50
636    - 2nd step of merge with ecco-branch:
637      merge changes in ecco-branch back into main trunk
638    - bug fix in find_alpha
639    - more storing in gmredi_calc_tensor.F, kpp_routines.F
640    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
641    - merged some sliced AD support routines
642    
643    checkpoint49
644    merged from ecco-branch:
645    o exf:
646      - Enable initialisation of forcing fields to constant
647        (runtime) values.
648      - in exf_getffields.F
649        Reduce i-/j-loop to interior domain, discarding overlaps.
650        That also fixes wrong TAF-key computations for key_1, key_2
651        with bulf formulae.
652      - exf_init.F modify #ifdef for exf_init_evap
653      - exf_getffieldrec.F, ctrl_getrec.F
654        The following INT-usages are not safe:
655          fldsecs  = int(fldsecs/fldperiod)*fldperiod
656          fldcount = int(fldsecs/fldperiod) + 1
657        and were modified.
658    o autodiff: checkpoint_lev...
659      - updated storing for bulk formulae (some arrays were missing)
660      - added state for seaice package
661      - synchronized with main branch
662    o DIVA:
663      Modif.s in
664      - the_main_loop.F
665      - the_model_main.F
666      and added cost_final_restore.F cost_final_store.F
667      o With these changes, it is possible to fully separate
668        the first forward run to compute the cost function (mdthe_main_loop)
669        and adjoint runs over individual DIVA intervals (adthe_main_loop)
670        into separate model executions.
671        This enables better tuning of DIVA to given queue sizes.
672      o Loss of cost function value in consecutive DIVA runs is
673        fixed by storing to 'costfinal' file.
674      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
675        beginning/end of adjoint integration is accounted for.
676      The current changes apply to TAF-1.4.26.
677      TAF has one remaining bug, requiring one manual change
678      (see MITgcm manual).
679    o cal: synchronized between MAIN and ecco-branch
680    
681    checkpoint48i_post
682    o Changes to restore differentiability of code w.r.t. previous tag
683      (mostly adding new routines to make list and replacing
684      pressure by totPhiHyd).
685    o Updated and merged grdchk package
686      - has both ADM and TLM checks
687      - works for single- and multi-proc.
688      - output cleaned
689      - worked successfully for parallel DIVA
690    o genmake:
691      - Adding -platform=SP4
692      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
693    o Modif. for DIVA:
694      ctrl_unpack should not be called in intermediate DIVA interval.
695      (similar thing would apply for active files such as
696      tbar, sbar, psbar, which should not be reinitialised;
697      only relevant for ecco-branch)
698    
699    checkpoint48h_post
700    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
701    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
702    o Added SEAICE_initialHEFF to pkg/seaice
703    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
704    
705    checkpoint48g_post
706    --- EOS:
707    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
708      store total Potential in totPhyHyd for diagnostics & EOS.
709    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
710    --- Pressure/geopotential gradient:
711    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
712    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
713      ( changes results of global_ocean_pressure )
714    o NLFS + z-coord.: add eta*Rho' contribution.
715    o accurate phiHyd when using interface-W at the middle between 2 centers
716     ( changes results of ideal_2D_oce )
717    o includes r* 2nd term in potential gradient.
718    
719    checkpoint48f_post
720    Merging from release1_p12:
721    o Modifications for using pkg/exf with pkg/seaice
722      - improved description of the various forcing configurations
723      - added basic radiation bulk formulae to pkg/exf
724      - units/sign fix for evap computation in exf_getffields.F
725      - updated verification/global_with_exf/results/output.txt
726    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
727      (SBO) core products, including oceanic mass, center-of-mass,
728      angular, and bottom pressure (see pkg/sbo/README.sbo).
729    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
730      to avoid negative values in shallow regions.
731      - updated verification/natl_box/results/output.txt
732      - updated verification/lab_sea/results/output.txt
733    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
734    o Added useSingleCpuIO option (see PARAMS.h).
735    o Updated useSingleCpuIO option in mdsio_writefield.F to
736      work with multi-field files, e.g., for single-file pickup.
737    o pkg/seaice:
738      - bug fix in growth.F: QNET for no shortwave case
739      - added HeffFile for specifying initial sea-ice thickness
740      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
741    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
742      kpp_transport_t.F, forward_step.F, and the_main_loop.F
743    o pkg/seaice:
744      - adjoint-friendly modifications
745      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
746    
747    checkpoint48e_post
748    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
749    o dynamics: change definition of computational domain & adapt mom_fluxform
750      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
751    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
752        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
753        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
754        global_ocean.90x40x15 global_with_exf global_ocean_pressure
755        inverted_barometer solid-body.cs-32x32x1
756      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
757    
758    checkpoint48d_post
759    o in preparation for r*:
760     a) use pre-computed gradient of hydrostatic potential:
761        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
762     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
763        => affects results of glob_oce_pressure (different truncation error)  
764      update output.txt of ideal_2D_oce & global_ocean_pressure
765    
766    checkpoint48d_pre
767    o in preparation for r*:
768      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
769      pass the 2 comp. of the grad. as arguments to momentum S/R.
770      but for the moment, only used if it does not change the results.
771    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
772    
773    checkpoint48c_post
774    Modifications in treatment of initial flux forcing controls
775    to avoid extra storing of flux fields.
776    
777    checkpoint48c_pre
778    o Added tidal_basin_2d experiment (currently 1D!)
779    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
780    
781    checkpoint48b_post
782    o r* coordinate added in #ifdef NONLIN_FRSURF block.
783     (modification to pressure gradient not yet implemented)
784    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
785      (for U & V) that are used for vertical advection of momentum.
786    
787    checkpoint48a_post
788    o In preparation for r*, use temp. array to compute vertical transport
789       in flux-form momentum pkg. => change results of few test-exp.
790      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
791                        lab_sea, natl_box & plume_on_slope
792    
793    checkpoint48
794    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
795    
796    checkpoint47j_post
797    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
798    o moved adexch from forward_step to addummy_in_stepping
799    o added exch in ctrl_map_...
800    o aveFreq.=0. at end of cost_final to avoid overwrite in
801      reverse checkpointing loop
802    o Yet more changes in gmredi:
803      * adgmredi_calc_tensor
804        avoiding all recomputation of gmredi_slope_limit
805      * adgmredi_x/y/rtransport
806        added flag for excessive storing to avoid recomp. of
807        u/v/rtans, dTdx/y/z
808        -> this is not really necessary and very memory-consuming
809      * adgmredi_slope_psi:
810        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
811      * gmredi_slope_limit
812        re-activated full calculation of taperfct for case 'ac02'
813    o updating verification/ adjoints of carbon, global_ocean.90x40x15
814    
815    checkpoint47i_post
816    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
817    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
818      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
819    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
820    o gmredi: fix few bugs.
821    
822    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
823    This will be a good checkpoint to plug into the ecco-branch.
824    o few modif.'s to get latest version adjointed
825      (mainly kick out code in ini_linear_phisurf)
826    o modif's to run adjoint with exactConserv
827    o case GM_BOLUS_ADVEC should be cleaned
828      S/R gmredi_slope_psi should be cleaned
829    o verification/carbon now has exactConserv=.TRUE.
830    
831    checkpoint47g_post
832    o time-average AIM output: becomes independent from statvars time-average
833      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
834    o After TAF bug fix:
835      Tested adjoint of gmredi package.
836      Tests were done with checkpoint47 rather than with latest
837      checkpoint47f_post since the latter is broken for the adjoint
838      verification/carbon/ contains both ADM and TLM gradient checks.
839    Here they are, before they get changed/lost/stolen.
840    Mostly modif.'s to fix numerical sensitivities.
841    Gradient checks OK for
842    - GM_taper_scheme:
843      * clipping
844      * ac02
845      * linear
846      * glw91
847      * dm95
848      * ldd97
849    - GMREDI_OPTIONS:
850      * GM_VISBECK_VARIABLE_K
851      * GM_NON_UNITY_DIAGONAL
852      * GM_EXTRA_DIAGONAL
853      * GM_BOLUS_ADVEC
854    in conjunction with data.gmredi parameters to be checked in
855    in a few minutes under verification/carbon/code/
856    
857    checkpoint47f_post
858    Merging from release1_p10:
859    o modifications for using pkg/exf with pkg/seaice
860      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
861        and SEAICE_EXTERNAL_FLUXES
862      - pkg/exf CPP options EXF_READ_EVAP and
863        EXF_NO_BULK_COMPUTATIONS
864      - usage examples are Experiments 8 and 9 in
865        verification/lab_sea/README
866      - verification/lab_sea default experiment now uses
867        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
868    
869    checkpoint47e_post
870    o created a tag prior to creating a branch
871    
872    checkpoint47d_post
873    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
874      at the bottom boundary had an erroneous half slip boundary condition
875    o added bottom drag and no slip boundary condition capabilities to
876      oceanic pressure coordinates code
877    o added new verification experiment global_ocean_pressure, this experiment is
878      also described in the tutorial section of the manual
879    checkpoint47d_pre
880    
881    checkpoint47c_post
882    o Added a verification experiment for a global cubed-sphere ocean run
883      -  verification/global_ocean.cubed32x32x30
884      -  uses pkg/therm_seaice and pkg/bulk_forcing
885    
886    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
887    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
888      when using P-coordinate; only implemented for atmospheric config.
889    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
890      NOTES: requires option NONLIN_FRSURF to be "#define".
891    o update advect_xz/results/output.txt (left from checkpoint44g_post)
892    
893    checkpoint47b_post
894    Merging from release1_p9:
895    o pkg/seaice
896      - removed GOTO's and added taf directives
897      - double precision constants to reduce the g77 (Linux)
898        to F77 (SGI) differences reported in release1_p8
899    o tools/genmake
900      - added SGI options
901    o verification/testscript
902      - updated to that of checkpoint47a_post
903    o verification/global_ocean.90x40x15/input/eedata
904      - modified for SGI f77 compatibility
905    o verification/lab_sea
906      - added description of sea-ice model
907      - added missing matlab routines
908      - added test of thermodynamics parallelization
909    
910    checkpoint47a_post
911    o new pkg: aim_v23
912     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
913       for now, keep the same surface forcing as before.
914     - Part-Cell implemented into AIM; check that Heat & Water are conserved
915     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
916     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
917    o add diagnostic of surface correction term in monitor output
918    
919    o bulk_force and therm_seaice
920    - Two packages:  bulk_force (Bulk forcing)
921      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
922    - Earlier integration from Stephaine Dutkiewicz
923      and Patrick Heimbach.
924    - Two ifdef statements for compile time,
925       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
926    
927    checkpoint47
928    differentiable version of checkpoint46n_post
929    o bug fix in quasihydrostaticterms
930    o * "clean" adjoint code (in terms of extensive recomputations)
931        can now be obtained for all GMREDI options (i.e. for
932        - GM_VISBECK_VARIABLE_K
933        - GM_NON_UNITY_DIAGONAL
934        - GM_EXTRA_DIAGONAL
935        - GM_BOLUS_ADVEC )
936      * However, wrong gradient check problem remains unsolved.
937      * New CPP options have been introduced for different
938        tapering schemes
939    o external_fields_load now part of differentiation list
940    o pressure needs multiple storing;
941      would be nice to have store_pressure at beginning or
942      end of forward_step, e.g. by having phiHyd global (5-dim.)
943      (NB: pressure is needed for certain cases in find_rho,
944      which is also invoked through convective_adjustment).
945    o recomputations in find_rho for cases
946     'JMD95'/'UNESCO' or 'MDJWF' are OK.
947    o #define ATMOSPHERIC_LOADING should be differentiable
948    o ini_forcing shifted to begining of initialise_varia
949    o Incorporating QNVS line search routines into MITgcm
950      (this is separate code, and therefore not under pkg)
951      lsopt/, optim/
952    o Updated verification/carbon/
953      - #define GM_VISBECK_VARIABLE_K
954      - GM_taper_scheme    = 'ldd97'    
955    
956    checkpoint46n_post
957    Merging from release1_p8:
958    o verification/natl_box:
959      updating new external_fields_load routine
960    o New package: pkg/seaice
961      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
962      The sea-ice code is based on Hibler (1979-1980).
963      Two sea-ice dynamic solvers, ADI and LSR, are included.
964      In addition to computing prognostic sea-ice variables and diagnosing
965      the forcing/external data fields that drive the ocean model,
966      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
967      The implied surface heat flux is then stored in variable
968      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
969      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
970      non-local transport term.  Because this call precedes model
971      thermodynamics, temperature under sea-ice may not be "exactly" at
972      the freezing point by the time theta is dumped or time-averaged.
973      N.B.: fairly large differences in accuracy occur across
974            different platforms/compilers; comparison between
975            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
976            generated output gives:
977       T           S           U           V
978      C D M    c        m  s        m  s        m  s        m  s
979      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
980      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
981      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
982    
983      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
984    o GAD:
985      - generated new common blocks to account for call of
986        same gad routines with differing traceridentities
987        (needed to modify tracerIdentity indices in GAD.h)
988      - generated separate common blocks for case useCubedSphereExchange
989        (Department of Futurology)
990      - parameter lists to gmredi_?transport: added tracerIdentity
991      - added new key indices to tamc.h
992    o external_fields_load:
993      - added this routine to TAF list
994      - needed to make some common blocks global and additional storing
995        along the same lines as exf package (checkpoint_lev?_directives.h)
996    o exf:
997      updated external forcing package
998      - bug fixes carried over from ecco-branch
999        (missing OBCS_OPTIONS.h in two routines)
1000      - enable easy to use "no forcing".
1001      - added exf I/O for atmospheric loading
1002      - added exf I/O for runoff data
1003      - transfered scaling between exf <-> MITgcm to exf namelist
1004    o Adding new verification experiment global_with_exf.
1005      This verification experiment is almost identical to the
1006      global_ocean.90x40x15 experiment, except that it uses
1007      the exf (and cal) package instead of the
1008      external_fields_load routine (cf README file).
1009    
1010    checkpoint46m_post
1011    o modified testscript to return -- when there are no lines of "%MON" output
1012    o added new flag "quasiHydrostatic" for QH mode
1013      and new routine quasihydrostaticterms()
1014    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1015      New routine: mom_u_coriolis_nh()
1016    o fixed sign of non-hydrostatic metric terms in u and v equations.
1017      Depend on correct sign of gravitySign.
1018    o added work.pc* to .cvsignore in aim directories using ifc
1019    o introduced flag for controllin non-hydrostatic metric terms
1020    o removed gravitySign from PARM04
1021    o switched to g77/ifc from pgf77 in aim experiments
1022    
1023    checkpoint46l_post
1024    o made convective adjustment work with pressure coordinates:
1025     - changed the direction of k-loop in convective_adjustment.F for the
1026       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1027     - adjusted the reference pressure k-index in convective_adjustment.F
1028     - adjusted the convection condition in convect.F (in analogy to
1029       calc_ivdc.F)
1030     - convective_adjustment no longer computes anything on the halos
1031     - removed the warnings about negative salinity from find_rho.F and
1032       find_alpha.F; instead the new routine look_for_neg_salinity, called
1033       at the beginning of find_rho, find_alpha, and find_beta, does a
1034       check of the entire slice, if CPP-option
1035       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1036    checkpoint46l_pre
1037    
1038    checkpoint46k_post
1039    o fixed the verification/global_ocean.90x40x15 experiment:
1040     - new bathymetry (the world according to A., JMC, and M.)
1041     - new initial fields and forcing fields (*.bin files)
1042     - new POLY3.COEFFS (for the next release one should switch to a full
1043       equation of state: JMD95P or MDJWF)
1044     - fixed several errors and redundancies in the data file
1045     - experiment uses looped cells
1046     - added matlab directory with diagnostic scripts for plotting of output
1047    
1048    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1049     - read AIM physics parameters from a file (data.aimphys)
1050     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1051    
1052    checkpoint46j_post
1053    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1054    o move wVel computation at the end of the time step, in S/R integr_continuity
1055    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1056    o update timeave pkg for wVel diagnostic.
1057    checkpoint46j_pre
1058    
1059    checkpoint46i_post
1060    o Clean up AIM package (and keep the results unchanged):
1061      include CPP_OPTION and use IMPLICT NONE in all routines ;
1062      declare all the variables _RL ; use _d 0 for all numerical constants.
1063      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1064    
1065    checkpoint46h_post
1066    o cleaned up the use of rhoNil and rhoConst.
1067      - rhoNil should only appear in the LINEAR equation of state, everywhere
1068        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1069        and the dynamical equations are all divided by rhoConst
1070    o introduced new parameter rhoConstFresh, a reference density of fresh
1071      water, to remove the fresh water flux's dependence on rhoNil. The default
1072      value is 999.8 kg/m^3
1073    o cleanup up external_forcing.F and external_forcing_surf.F
1074      - can now be used by both OCEANIC and OCEANICP
1075    checkpoint46h_pre
1076    
1077     Added code to convert surface volume flux (fresh water) into
1078     a mass flux when using P coordinates in the ocean (OCEANICP).
1079     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1080    
1081    checkpoint46g_post
1082    o Include a new diagnostic variable phiHydLow for the ocean model
1083      - in z-coordinates, it is the bottom pressure anomaly
1084      - in p-coordinates, it is the sea surface elevation
1085      - in both cases, these variable have global drift, reflecting the mass
1086        drift in z-coordinates and the volume drift in p-coordinates
1087      - included time averaging for phiHydLow, be aware of the drift!
1088    o depth-dependent computation of Bo_surf for pressure coordinates
1089      in the ocean (buoyancyRelation='OCEANICP')
1090      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1091        Theta, Salinity, and Pressure in the parameter list. This routine is
1092        presently contained in find_rho.F. This routine does not give the
1093        correct density for 'POLY3', which would be a z-dependent reference
1094        density.
1095    o cleaned up find_rho
1096      - removed obsolete 'eqn' from the parameter list.
1097    o added two new verification experiments: gop and goz
1098      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1099    checkpoint46g_pre
1100    
1101    checkpoint46f_post
1102    o Enable tangent linear (forward mode) gradient checks:
1103      - extended active file handling to g_... files
1104      - added TANGENT_SIMULATION to theSimulationMode
1105      - extended grdchk package accordingly
1106    o added tangent linear setup in verification/carbon/code_ftl
1107    o added adjoint setup in verification/front_relax/code_ad
1108    
1109    checkpoint46e_post
1110    o Added new equation of state -> MDJWF
1111      - EOS of McDougall et al., 2002, JAOT, submitted
1112      - caveat: the equation of state is only valid for a smaller (more
1113        realistic?) range of values than JMD95P/Z and UNESCO
1114      - added masks to the calculation of pressure in store_pressure
1115      - added more check values for density in check_eos (ini_eos.F), some of
1116        the old check values are out of the range of the MDJWF-eos, so don't
1117        expect perfect matches for those
1118    checkpoint46e_pre
1119    
1120    checkpoint46d_post
1121    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1122      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1123      case of pressure coordinates. eosType='JMD95Z' in
1124      combination with buoyancyRelation='OCEANICP' now causes an error.
1125    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1126      in find_alpha/beta.
1127    checkpoint46d_pre
1128    
1129    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1130      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1131    
1132    checkpoint46c_post
1133    o Changes necessary for ocean in p-coordinates
1134     -  Added new buoyancy relation = 'OCEANICP'
1135     -  Added new parameters = gravitySign (this used to be contained inside
1136        the factor dRdZ which I added when we first switched to R coordinates).
1137     X GM/Redi is not compatible (yet)
1138     X bottom drag and no-slip need to be debugged.
1139    checkpoint46c_pre
1140    
1141    checkpoint46b_post
1142    o Added new equation of state -> JMD95Z and JMD95P
1143      - EOS of Jackett and McDougall, 1995, JAOT
1144      - moved all EOS parameters into EOS.h
1145      - new routines ini_eos.F, store_pressure.F
1146    o Added UNESCO EOS, but not recommended because it requires
1147      in-situ temperature (see JMD95)
1148    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1149      unesco.f to be used with POLY3
1150    checkpoint46b_pre
1151    
1152    checkpoint46a_post
1153    o Added (atmospheric) pressure loading
1154      - new field in FFIELDS.h, etc...
1155      - new cpp flag ATMOSPHERIC_LOADING
1156    o Changed hFacC to _hFacC in calc_phi_hyd.F
1157    o Added SHORTWAVE_HEATING to some files for consistency
1158    checkpoint46a_pre
1159    
1160    checkpoint46
1161    further merges from release1_p5
1162    o new ctrl package
1163      - adopted from ECCO environment to enable optimization
1164      - added Eliassen Palm fluxes to controls
1165    o added Eliassen Palm flux controls to gradient check package
1166    o cost package
1167      - Compatible with new ctrl package
1168      - added Eliassen Palm cost hooks
1169      - modif's of existing cost functions
1170    o Adjoint-related bug fixes in kpp:
1171      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1172      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1173    o autodiff package
1174      - flow directives:
1175        + new for S/R do_the_model_io
1176        + enhanced for S/R checkpoint
1177        + new gmredi.flow
1178      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1179        disable adcommon.h/g_common.h by default.
1180      - fixed problem for adjoint of global_max
1181    o modified verification/carbon/
1182    o New setup for adjoint of global_ocean
1183    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1184    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1185    o incorporated hooks for sponge layer code (external_forcing.F)
1186    
1187    checkpoint45d_post
1188    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1189    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1190      (affects plume_on_slope "cg2d" output)
1191    o add new parameter deltaTfreesurf for free-surface time stepping
1192    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1193    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1194    o change phiMin in exp1 (to agree with documentation)
1195    o add new flags:
1196     - T,S forcing inside/outside Adams-Bashforth
1197     - turn off temp,salt advection and/or forcing
1198     - for each tracer, define internal flag for multiDimAdvection & A-B
1199    o monitor: change definition of KE to check conservation of Energy
1200    
1201    checkpoint45c_post
1202    o Removed f90 comments ("!")
1203    o Modified initialisations to enable exf package for MITgcm
1204      (without invoking ECCO_PACKAGE).
1205    o modifications to gradient check package (Martin Losch)
1206      - enable centered differences
1207      - modified format of standard output
1208    
1209    checkpoint45b_post
1210    o cleaned exchange calls in cg2d
1211    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1212    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1213      to configure barotropic setup (Martin Losch)
1214    o moved some initialisations within bi,bj loop in dynamics
1215      (TAF flow dependency)
1216    o in initialise_varia, moved call packages_init_variables
1217      before convective_adjustment_init
1218      (corresponding adjustment of TAF tape initialisation).
1219    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1220    
1221    checkpoint45a_post
1222    o compute Rho over the whole domain (extend iMin,jMin indices)
1223    o specific exchange for X-slice domain (case Ny=1)
1224    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1225    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1226    
1227    checkpoint44h_post = checkpoint45
1228    o Fix to restore differentiability:
1229      place at which packages_init_variables is called in
1230      initialise_varia is crucial for reverse control flow.
1231    o modifications in GMRedi to enable stable adjoint
1232      (corresponding modif's in thermodynamics, dynamics)
1233    o added missing hook for sponge layer code in external_forcing
1234    o modified test cost functions
1235    o storing in gad_advection (plus removal of write(0,*)!
1236    o missing headers TR1.h added in convective_adjustment routines
1237    o errorMessageUnit set non-equal zero in eeboot
1238      (conflict on some platforms, e.g. IBM SP3)
1239    o modified carbon verif.
1240    
1241    checkpoint44h_pre
1242    o vertical grid option: allow to put the Interface at the middle between
1243      2 cell-centers ; replace delZ in pkg/kpp by drF.
1244    o GM Advective form: Tracers are advected using the residual transport (=
1245      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1246    
1247    checkpoint44g_post
1248    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1249      results) ; ifdef missing in thermodynamics.F
1250    
1251    checkpoint44f_pre,checkpoint44f_post
1252    o added PTRACERS package
1253      This allows an arbitrary number of passive tracers to be integrated
1254      forward simultaneously with the dynamicaly model.
1255      + Implemented so far:
1256        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1257        - I/O and checkpointing
1258        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1259      + Not implemented so far:
1260        - KPP
1261        - OBCS
1262      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1263        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1264        line in data.pkg.
1265      + This package is disabled by default since it increases storage.
1266    
1267    
1268    o testscript: added -cleanup option
1269    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1270                 b) enable to filter 2D fields.
1271    
1272    checkpoint44e_pre,post
1273    o re-wrote convective adjustment to use pre-calculated weights
1274      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1275      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1276      Original calls to convect() still in place.
1277    
1278    chkpt44d_pre,post
1279    o added missing EXCLUDE_MONITOR flags
1280    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1281      (incompatible typ in MIN/MAX expressions caused problems
1282      on IBM SP3)
1283    o in genmake added variable MAKEDEPEND
1284      plus resetting for case SunOS
1285    o added timer_stats.c routine for IBM SP3
1286    o removed variables in dynamics
1287    !!! I forgot to create tag chkpt44d_pre !!!
1288    !!! But chkpt44d_pre = chkpt44c_post    !!!
1289    
1290    o real fresh water flux implemented with non-linear free-surface.
1291    
1292    chkpt44c_pre,post
1293    o few fix (mask in shap_s2, EmPmR in external_field_load,
1294      USE_NATURAL_BCS in solve_for_P);
1295    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1296    
1297    checkpoint44b_pre/_post
1298    o merge of relevant stuff from the ecco-branch:
1299      - genmake: removed $S64 overwrite for case SunOS
1300      - pkg/exf: update and corrections for field swapping and obcs
1301      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1302                  harmonized between ECCO and MITgcm
1303      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1304                      updated checkpointing_lev... lists for obcs
1305      - model/src: minor changes in forward_step, plot_field
1306                   added directive for divided adjoint in the_main_loop
1307      - pkg/mdsio: added mdsio_gl_slice
1308    
1309    o check parameters & config (chkpt44a_pre,post)
1310    o OBC and NonLin_FrSurf.
1311    
1312    checkpoint44
1313    o fix bug in mom_vi_del2uv
1314    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1315    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1316    o update AIM experiments (NCEP input files)
1317    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1318    o added some stuff for AD
1319    
1320    checkpoint43
1321    o added two new advection tests
1322    o added global 4x4 degree ocean test
1323    o added test of H&S94 with free surface on cube
1324    o some final mods for gradient check, adjoint,...
1325    
1326    checkpoint42
1327      Fixed AD-related problems:
1328    o Store directives up-to-date with re-arranged Adams-Bashforth
1329      (mainly thermodynamics.F)
1330    o New store directives for multi-dim. advection schemes
1331      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1332      * new common block and key passkey
1333      (mainly gad_advection.F)
1334    o Modified store directives for split of dynamics/thermodynamics
1335      for the case ALLOW_KPP
1336    o Cleaned argument list for timestep_tracer.F
1337    
1338    checkpoint41
1339    o re-formatted/added comments in prologues of key subroutines
1340      to work with protex
1341    
1342    checkpoint40
1343    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1344    o added FLT (floats) package from Arne along with demo. experiment
1345    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1346      implementation of forward-in-time forcing terms
1347    o more mods for non-linear free-surface including new variable
1348    o modified multi-dim method to work on cube
1349    o bug fix in KPP (from DM)
1350    
1351    checkpoint40pre9
1352    o added DST advection schemes
1353    o fix MPI bug on SGI's
1354    o modifications for non-linear free-surface
1355    o fixed conditionals for fixed flow/passive tracer only mode
1356    o added tension/strain form of stress tensor
1357    o changes to commenting of arguments for TAF/TAMC
1358    o added/updated many matlab scripts
1359    o added multi-dimensional advection method for tracers
1360      
1361    checkpoint40pre8
1362    o new package rw/
1363      Added method for dumping intermediate local arrays:
1364      mdsio_writetile - same as mdsio_writefield except works from inside
1365                        bi,bj loop
1366      mdsio_writelocal - same as mdsio_writetile except works for local
1367                         arrays
1368      write_local_r? - higher-level wrapper for mdsio_writelocal
1369      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1370      Example given at end of mom_vecinv.F that dumps some local arrays.
1371    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1372      control flux-form versus vector invariant code.
1373      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1374      or genmake -DISABLE ...
1375    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1376      (additional storing is now needed for case vecinv;
1377      currently nothing implemented to switch this storing off
1378      in case fluxform is used since no CPP flag available).
1379    
1380    checkpoint40pre7
1381    o bug fix in dynamics.F
1382      calc_viscosity called before k=1,Nr loop.
1383    o added some #ifdef's ALLOW_PASSIVE_TRACER
1384    o cleaned initialisations in ctrl_map_ini
1385      related to TAF
1386    
1387    checkpoint40pre6
1388    o split dynamics into thermodynamics & dynamics
1389    o corresponding split of calc_diffusivity into
1390      calc_diffusivity, calc_viscosity
1391      (kpp_calc_diff, kpp_calc_visc).
1392    o Added diffkr, kapgm to control variables
1393    o bug fix in gmredi_slope_limit for ldd97
1394    
1395    checkpoint40pre5
1396    o proper initialization of Adams-Bashforth time stepping
1397      + uses forward step for very first step of model (iter=0)
1398    o re-generated *all* output since almost all output is modified by this
1399      change (sorry but we've been putting this one off for about 2 years)
1400      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1401        *not* regenerated since they are already out of date and I don't
1402        want to create the impression that they are suddenly working.
1403    o removed KAP stuff for DEC's
1404    o modified/added many .cvsignore files in */code and */input
1405    o added new expt "solid-body.cs-32x32x1"
1406      + this uses an alternative form of ini_curvilinear_grid.F which
1407        is not necessarily any better than the current one...
1408    
1409    checkpoint40pre4
1410    o added re-initialisations of utrans,vtrans,rtrans in
1411      calc_common_factors which are crucial for TAF.
1412    o extended iMin,jMin range for calc_common_factors,
1413      calc_diffusivity
1414    o added option ALLOW_PASSIVE_TRACER
1415    o a few minor updates and fixes
1416    
1417    checkpoint40pre3
1418    o created calc_gtr1.F for gad package
1419    o split the_main_loop and re-introduced forward_step
1420    o some recomputations of nIter0 for TAMC
1421    
1422    checkpoint40pre2
1423    o Updated to latest branch of AJA, JMC
1424    o Added gradient check package
1425    o Added routines for passive tracer handling
1426    o Added carbon sequestration sensitivity experiment
1427    
1428    checkpoint39
1429     o Modifications and fixes to support TAMC
1430       (mainly missing or wrong directives)
1431     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1432       in addummy_in_stepping
1433     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1434     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1435     o Included following packages:
1436       cal: calendar
1437       exf: external forcing
1438       ecco: essential routines to control use of cal, exf
1439             (NB: this is not the full ECCO environment)
1440     o disabled some packages by default in genmake
1441    
1442    checkpoint38
1443     o see notes_c37_adj.txt
1444     o corrected wrong layer index in external_forcing_t
1445     o replaced the_main_loop/forward_step by the_main_loop
1446     o removed forceoutput from write_state
1447       (replaced criteria for initial/final state)
1448     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1449    
1450    checkpoint37
1451     o mdsio.F routine split and packaged in pkg/mdsio
1452       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1453        used unless genmake -disable=mdsio)
1454     o allow a more precise surface-geopotential gradient for the atmosphere
1455       taking into account the change in space of Alpha (=1/rho) at the surface.
1456     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1457       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1458     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1459       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1460       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1461     o Time-Average diagnostics defined as a pseudo package "timeave".
1462     o pickup files : old pickup (before c35) did not work with new code (c35
1463       and after) unless activating 2 commented lines in initialise-varia.
1464     o Non-Hydrostatic pickup file Pb fixed.
1465     o bug with Rigid-lid version (since c35) fixed.  
1466    
1467    checkpoint36
1468     o implement Crank-Nickelson barotropic time-stepping
1469     o recover Time-Average diagnostics
1470     o fix Pb in checkpoint (PR#19)
1471     o AIM become a standard package ; clean unused CPP_kees
1472    
1473    checkpoint35
1474     o subtantial rewrite of dynamics.f
1475     o allows staggered time-stepping
1476     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1477     o added bottom drag (linear + quadratic)
1478    
1479    checkpoint34
1480     o Modified exchange routines for correct reverse simulation.
1481     o Added verification output to comply with bug fix in impldiff.F
1482       as of c33 (exp2, natl_box).
1483     o Corrected store directives in dynamics.F
1484     o Corrected array boundaries in impldiff.F
1485     o Corrected array dimensions in gmredi.
1486       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1487     o Added routine GLOBAL_SUM_INT to global_sum.F
1488     o Added mdsio_gl.F for ECCO purposes.
1489    
1490    checkpoint33
1491     o Fixed bug in lower BC in impldiff.F
1492     o Fixed confusion about units of forcing arrays in FFIELDS.h
1493       namely Fu,Fv,Qnet,Qsw,EmPmR:
1494       - Removed verification/natl_box/code/external_fields_scale.F
1495         (did not differ from that in model/src)
1496       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1497         (see FFIELDS.h for description)
1498       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1499         kpp_calc.F and kpp_transport_t.F
1500       - Removed model/src/external_fields_scale.F and calls to it
1501       - verification/natl_box uses flux data with "atmospheric" sign so
1502         a special version of external_fields_load.F is used to
1503         change the data as it's read in. This way, the arrays
1504         have the right units and signs at all times tha a user could
1505         possibly use them.
1506     o Corrected genmake to delete a temporary file during configuration
1507    
1508    checkpoint32
1509     o Scaling of forcing fields moved from external_forcing.F to
1510       external_fields_scale.F, called directly after loading fields.
1511     o Surface relaxation terms added to surface tendency fields in
1512       extra subroutine.
1513     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1514       fields.
1515     o Changes in GMRedi to comply with packaging structure.
1516     o Modifications and bug fixes in KPP package.
1517     o Verification experiment for KPP added (verification/nat_box/)
1518    
1519    checkpoint31
1520     o Packages interface brought in line with defined standard
1521       -> new routines packages_...F
1522       -> changes in initialise_fixed.F, initialise_varia.F
1523       -> enables initialisation interface for ECCO package
1524     o Rescaling of external forcing fields immediately after read
1525       (removed from external_forcing.F)
1526       -> new: surface_fields_scale.F
1527       -> affects ini_foorcing.F, external_fields_load.F
1528     o Computation of surface tendencies before tendency updates.
1529       -> new: external_forcing_surf.F
1530     o Change of variable names useGMRedi, useKPP, useECCO
1531     o Further changes in dynamics.F, impldiff.F for TAMC
1532     o Tested for experiments 0, 2, 4.
1533       - not yet tested for GMRedi.
1534       - not yet tested for KPP.
1535    
1536    checkpoint30
1537     o Updates for OBCs
1538     o New experiment for test OBCs (internal_wave)
1539     o New output.txt in verification/exp4/results/
1540     o Updates for KPP: calculation of viscosity corrected, new variables
1541       kpp_dumpFreq and kpp_taveFreq
1542     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1543       and entry for T90 in genmake
1544    
1545    checkpoint29
1546     o packaged KPP and GM/Redi
1547    
1548    checkpoint28
1549     o Corrected initialization of hFacMin for difference vertical coordinates
1550     o Modified calculation of partial cell thickness to more robust algorithm
1551     o config_summary.F: replaced write_1D_... by write_0D_...
1552       read_write.F: added subroutines write_0D_...
1553     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1554       included some initialisations required for TAMC.
1555     o routine calc_isoslopes: modified sqrt computation to make it
1556       differentiable for zero argument.
1557     o routines dynamics, impldiff:
1558       included store directives and tape key computations required for TAMC.
1559     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1560    
1561    checkpoint27
1562     o fixed calc_isoslopes() to so that cancellation of terms in tensor
1563       formulation works properly with variable resolution.
1564     o restructured the calling tree between the_model_main() and dynamics()
1565     o split initialise() into initialise_fixed() and initialise_varia()
1566     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
1567       in new routine ini_psurf()
1568    
1569    checkpoint26
1570     o moved some #ifdef in optional routines to encompass everything
1571       except the argument declarations. This was using up some memory.
1572     o fixed macros like _ADT to work with both versions of Linux cpp
1573     o cleaned up some unused and uninitialized variables
1574       (helps when debugging with strict compile options)
1575     o split up CPP_EEOPTIONS.h into options and macros
1576       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1577     o patch for 2 processor JAM mode
1578    
1579    checkpoint25
1580     o updates for OBCs and NH
1581     o dramatically reduced memory usage
1582     o added "JAM" routines for use on Artic network
1583     o parameterization of convection by implicit vertical diffusion
1584     o added a diagnostic of convective index
1585     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1586       (this is was partly for OBCs and NH but also in anticipation of
1587        an explicit free-surface option)
1588     o initial state input files for U and V
1589    
1590    checkpoint24
1591     o Removed some spurious "REAL"s
1592     o Updated KPP to latest version from JPL
1593     o Added a COS(latitude) in horizontal viscosity
1594    
1595    checkpoint23
1596     o Added del^4 diffusion for salt and temperature
1597     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1598    
1599    checkpoint22
1600     o Made many small changes: implicit none, format(i5), etc...
1601     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1602    
1603    checkpoint21
1604     o Introduced new I/O package that supports direct-access records (mdsio.F)
1605     o Split-up mid-level I/O routines
1606     o Updated input data for experiments 0,1,2,4 and 5
1607     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1608    
1609    checkpoint20
1610     o Tidied up open-boundaries some more
1611     o Added non-hydrostatic code
1612     o Fixed some input data
1613     o Modified MPI start-up to work in "coupled" context.
1614    
1615    checkpoint19
1616     o Tidied up directory structure for verification experiments.
1617     o Added new code for open boundaries.
1618     o Corrected advective terms near boundaries.
1619     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1620     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1621     o Split default parameters out of ini_parms.F into set_defaults.F.
1622    
1623    checkpoint18
1624     o Further changes for optional code generation with
1625       CPP - ugh!
1626    
1627    checkpoint17
1628     o Beginning to incorporating modularity
1629       for supporting atmos. and ocean configs.
1630     o Small changes for TAMC complinace
1631     o New ultra simple test case. Barotropic box
1632       configuration "exp0".
1633    
1634    checkpoint16
1635     o Minor changes to exchange routines to support
1636       accumulation in reverse mode. Adjoint of an
1637       assignment is an addition.
1638     o Changes to support compilation by TAMC (LR(1)
1639       syntax) and by g77 under Linux ( 72 character
1640       limit ).
1641    
1642    checkpoint15
1643     Rewrote exchange routines to allow
1644     o General tile <-> tile connectivity.
1645     o TAMC reverse mode flag ( is this really needed? )
1646     o Variable width overlap and exchange region widths.
1647     o Hooks for sharing data via DMA, Arctic, Memory Channel,
1648       shmput/shmget, VIA, SYSV shmem and every other cool
1649       communication method.
1650    
1651    checkpoint14
1652     Consistent isomorphism chages made. These allow dynamical core
1653     to support both pressure and meters as a vertical coordinate.
1654    
1655    checkpoint13
1656     Release which corrects global_max problem and a couple
1657     of KGM time-averaging diagnostic errors. Also contains
1658     a double-gyre experiment setup as well as the baseline
1659     4 degree global template. The double gyre template is
1660     organised to allow it to be applied automatically to
1661     the baseline configuration.
1662    
1663    branch-point-rdot
1664     A few tidy-ups have been made bt the real point of this
1665     check-point (excuse the pun) is to allow a branch to be
1666     made for the purposes of adding the rDot alterations.
1667     I don't want to commit the rDot to the main-trunk until
1668     we've actually tested it...
1669    
1670    checkpoint12
1671     Tidy up and added generic genmake script (formerly
1672     configure script).
1673     Released to testers.
1674    
1675    checkpoint11
1676     Re-arranged initialise() and introduced ini_vertical_grid()
1677     and ini_masks_etc().
1678    
1679    checkpoint10
1680     Introduced the configure script.
1681     Separated out the diags package.
1682     Added template for writing time-averages of tile/intermediate quantities.
1683     Updated SIZE.h in exp2 and made the data big-endian.
1684    
1685    checkpoint9
1686     MPI fix. Filename changes (meta/data). salbin*y stuff.
1687     General tidy-up.
1688     SST.bin SSS.bin added to verification/exp2
1689    
1690    checkpoint8
1691     Inludes time-dependant forcing and time-averaging.
1692     Works at 4x4 and 2.8125x2.8125 global
1693    
1694    checkpoint7-4degree-ref
1695     Branch from checkpoint7. Released for application to
1696     global modeling and general modeling - process studies, regional
1697     model etc..
1698     Configured for verification/exp2 - 4 degree global, two process.
1699    
1700    checkpoint7
1701     Created by cnh
1702     Simple 4 degree global simulation
1703     configuration.
1704     Includes climatological wind,
1705     hydrography, bathymetry etc
1706     Does not include Heat Flux and E-P
1707    
1708  checkpoint6  checkpoint6
1709   Created by cnh   Created by cnh
1710   merged checkpoint5 with CD and   merged checkpoint5 with CD and

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