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revision 1.13 by cnh, Wed Sep 9 15:24:19 1998 UTC revision 1.289 by cnh, Thu May 6 13:51:15 2004 UTC
# Line 3  $Header$ Line 3  $Header$
3      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
4      ==============================      ==============================
5    
6    checkpoint53
7    o stable checkpoint with up to date adjoint
8      TLM tests only run for 1st grdchk at the moment. Its unclear if
9      this is a code problem or a problem with resetting code for g_
10      variables that is being autogenerated wrong.
11      Otherwise:
12       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
13       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
14         are both still in chaos following their security messes.
15    
16    checkpoint52n_post
17    o various build (mostly genmake2) changes including:
18      - ability to build/run more easily within Cygwin and MacOS X
19      - more complicated Makefiles with a stronger dependence on Gnu Make
20    o pkg/seaice modifications
21      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
22        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
23        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
24      - changed proxy for geostrophic velocity and updated
25        verification/lab_sea/results/* accordingly
26      - removed ADI dynamic solver from pkg/seaice
27      - replaced all occurrences of 1/CSTICE or 1/CSUICE
28        they caused a segmentation fault under certain circumstances
29      - removed unused field WATR
30    o bug fix in exf-package:
31      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
32         now reflect that.
33    o small fixes in the cal-package:
34      - set reference date to first of January for the 'model'-calendar
35      - failing of cal_CheckDate in cal_FullDate now actually results in a
36        warning
37    o small modifications in exf-package to increase flexibility:
38      - change climtempfreeze from a constant to a runtime parameter that
39        is specified in data.exf_clim (default = -1.9)
40      - introduce runtime parameter windstressmax (default = 2.0) that is
41        specified in data.exf
42    o fix in pkg/thsice:
43      - update Evap (Tsf changes) to be consistent with Latent heat flux
44      - maintain snow precipitation unchanged (even if Tsf >=0).
45     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
46    
47    checkpoint52m_post
48    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
49      this does not change any of the results, because myIter=0 in swfrac always
50      lead to jwtype=2 (the default anyway), but the call makes little sense
51      as a default
52    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
53    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
54      atmospheric model (AIM) to use it ; add a "slab ocean" component.
55    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
56    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
57    o extending useSingleCpuIO option to work with new exch2 I/O format
58      - old-style, missing-tile I/O is still accessible by defining CPP
59        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
60    o monitor package can write to NetCDF files and/or STDOUT
61    o fix re-definition bug in MNC_GRID_INIT_ALL()
62    o doc/api_reference added
63      - a framework for building an API Reference Manual using all
64        the "protex" comments embedded in the code
65      - see pkg/generic_advdiff, pkg/mnc for examples
66    o MNC:
67      - make myThid the last argument for all subroutines
68      - new default for the grid files: NO halos
69      - add useMNC and other run-time flags
70      - separate per-file-group handling of the unlimited dimension
71      - early initialization of MNC w/ flags read at the eeboot stage
72        and lookup tables set in initialize_fixed
73      - write all MNC output to a freshly-created directory
74    o thermodynamics sea-ice (thsice) is now tested with testreport.
75    o test exp. advect_cs: use the standard cs32 grid ; update output.
76    o Added functionality to grdchk:
77      pick global i,j,k position (or nearest wet) where to perform check.
78    
79    checkpoint52l_post
80    o new land formulation:
81      a) use ground enthalpy as prognostic variable to ensure exact
82         energy conservation.
83      b) account for water temperature and for latent heat of freezing
84         in all processes (rain, run-off, ground storage)
85      c) compute surface and ground temperature implicitly.
86    o aim_v23 modification for new land model:
87      a) Treat separately land / ocean / sea-ice surface fluxes
88         to allow implicit computation of land & sea-ice surface temp.
89      b) add snow precipitation.
90    checkpoint52l_pre
91    
92    o fix problem (when 1 tile is empty) in min/max monitor.
93    o fix bug in timeAve (u,vZetatave in common block)
94    o no restoring terms under ice for pkg/seaice
95    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
96    o bug fix for pkg/seaice pickups
97    o change MNC call locations and add coordinate attributes
98    o mask vorticity at the corner ; affects global_ocean.cs output
99    o fix ini_curvilinear_grid ; test CS experiments with mpi
100    o aim.5l_cs: modify sea-ice fraction input file ; update output
101    o exf: Adding simple range check routine for exf fields after read
102    
103    checkpoint52k_post
104    o removed top-level directory "diags"
105      - we migrated these functions to pkg/timeave a long time ago
106    o fixed bug introduced in pkg/monitor
107    o accuracy ctrlprec = 32 insuffient for gradient checks using
108      averaged fields (I/O via cost_averages)
109      -> use ctrl.h in active_file*.F to control I/O precision.
110    o paramter list of CALL ADTHE_MAIN_LOOP
111    o added initial do_the_model_io to ecco
112    o set all ...Freq to zero after cost_final
113      taveFreq, dumpFreq, pChkptFreq
114    o MAIN and ECCO differentiability restored
115    
116    checkpoint52j_post
117    o fix nchklev in tamc.h for global_ocean...
118    o Bringing flow and store directives up-to-date
119    o Really weird thing!
120      call do_the_model_io from the_main_loop with parameters
121      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
122      TAF places a faulty re-call of initialise_varia
123      after cost_final call which should not be there!
124    checkpoint52j_pre
125    
126    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
127      error messages
128    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
129    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
130      debug output
131    o modfied mdsio_writefield.F to handle non-global files under exch2
132    o update AIM Cubed-Sphere exp (aim.5l_cs):
133      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
134    o update AIM Equatorial Channel exp:
135      use standard aim_v23 pkg and change the SST fields to be more realistic.
136    o globalFile now works with exch2
137    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
138      mon_vort3.F to make exch2 friendly with >1 tile per cube face
139    o limit timeave output for hi-res integrations
140    
141    checkpoint52i_post
142    o removed CPP_EEOPTIONS.h from verification/*/code
143    o updated the tiling for global_ocean_pressure
144    checkpoint52i_pre
145    
146    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
147      the old pkg/aim).
148    
149    checkpoint52h_pre
150    o shortened offending lines in exch2_send_rx?.template
151    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
152    o genmake2: add build & execute test for NetCDF code
153    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
154      old grid files, moved CPP_EEMACROS.h to pkg/exch2
155    o added useSingleCPUIO flag to monitor.F and mon_out.F
156    o added temporary hack for sea-ice dynamics on the cube:
157      metric terms are ignored and it is assumed that
158      there is no sea-ice on cube faces 1, 2, 4, and 5.
159    
160    checkpoint52f_post
161    o added exch2 cube routines to pkg/exch2
162    o modified hs94.cs-32x32x5 to use it
163    o added new grid files to hs94.cs-32x32x5
164    checkpoint52f_pre
165    
166    checkpoint52e_post
167    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
168      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
169    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
170      to work with implicit vertical advection and AB ;
171    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
172    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
173     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
174    checkpoint52e_pre
175    
176    o fix bug in impldiff when Nr=1 or Nr=2.
177    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
178    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
179    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
180      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
181    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
182    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
183    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
184    
185    checkpoint52d_post
186    o re-tiled many expts to allow comparison in multi-processor mode
187      - updated output accordingly
188      - changed hs94.128x64x5 to use intial T from file rather than use the
189        random number generator
190    o add infrastructure in model routines for fizhi and gridalt packages
191    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
192    o changes to permit hi-res, cubed-sphere, configuration
193      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
194      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
195      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
196        of surface winds for the cube
197      (A verification experiment, based on global_ocean.cs32x15, but with
198       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
199       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
200       complete with example surface forcing files and matlab scripts to look
201       at the output and compare it with that of global_ocean.cs32x15.)
202    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
203       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
204       to conform to the common rule.
205    o check-in the first version of the coupler + interfaces for multi-components
206       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
207       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
208       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
209       - ocean and atmos. share the same horizontal grid (no interpolation).
210       - exchanges between component and coupler is done in forward_step
211    o new verification experiment, cpl_aim+ocn:
212       coupled ocean - AIM atmosphere on cs32 grid.
213    
214    checkpoint52d_pre
215    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
216    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
217    
218    checkpoint52c_post
219    o Fixing OPTIONS files for use of exf:
220      - ALLOW_ECCO not needed
221      - ECCO_CPPOPTIONS.h should not be included from
222        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
223        as has been the case in the past
224      - All cal/exf related options are currently set in
225        single header file. Should remain so until we
226        agree on a consistent new policy.
227    o Removed all CPP options for cal package.
228      cal has no more CPP options.
229    o modified STOREs in GAD_ADVECTION
230    o corrected key comp. for passkey
231    
232    checkpoint52b_post
233    o new version: "thsice" of thermodynamic sea-ice pkg:
234     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
235     - modify fluxes but do not change theta directly;
236     - light cleaning of bulk_force pkg (still needed with thsice).
237     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
238       + output_thsice.txt to test thsice & bulk_force pkgs.
239    o put back grid & coriolis monitor output.
240    checkpoint52b_pre
241    
242    o call "do_the_model_io" at the beginning (=> dump initial state)
243    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
244    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
245      (need info on NUMBER_OF_PTRACERS)
246    o missing PTRACERS headers in some routines
247    o default tamc.h in pkg/autodiff supposed to crash
248      to ensure proper customization
249    
250    checkpoint52a_post
251    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
252      - moved surfaceTendencyTice from pkg/seaice to main code
253      - subroutine FREEZE_SURFACE now limits only surface temperature
254        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
255        => new output.txt for global_ocean.cs32x15 & global_with_exf
256      - keep the old version of FREEZE for backward compatibility;
257        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
258      - corresponding modifs for TAF directives
259    o added surface flux output variables to TIMEAVE_STATVARS
260    o time-averaged output for pkg/ptracers
261    o fix problem with ECCO-related divided adjoint
262      snapshot file was missing some ad-variables,
263      but no warning issued by TAF
264    
265    checkpoint52a_pre
266    o some bug fixes for #undef REAL4_IS_SLOW
267    
268    checkpoint52 = ecco_c52_e35
269    o after testing adjoints of checkpoint51u_post
270    
271    checkpoint51u_post
272    o this is the post-merge tag of the ecco-branch
273      (needs another clean checkout and re-testing)
274    o various natl_box_adjoint configs and results
275      but no input fields
276    o obcs adjoint not yet merged!
277    o adding ECCO global 1x1 and 2x2 degree configs
278    o updated/extended some store directives for seaice
279    o pkg/ecco now containes ecco-specific part of cost function
280    o top level routines the_main_loop, forward_step
281      supersede those in model/src/
282      previous input data.cost now in data.ecco
283      (new namelist ecco_cost_nml)
284    o in ctrl/ cleaned some cross-dependencies and updated CPP options
285    
286    checkpoint51t_post
287    o this is the pre-merge tag of the ecco-branch
288    
289    checkpoint51s_post
290    o cleanup: removed various obsolete #define-s
291    o pkg/grdchk
292      - renamed 'ph-grd 3' to 'grad-res'
293      - merged from ecco-branch
294        (remaining bug fixes for obcs gradient checks)
295      - additional high-precision output for testreport
296        (grep for 'precision_grdchk_result')
297    
298    checkpoint51r_post
299    o cleaned up or removed CPP_OPTIONS.h files
300    o updated results for some of the tests to reflect the new
301      optfiles (-ieee: -O0 instead of -O3)
302    
303    checkpoint51q_post
304    o cd_code:
305      - moved cd_scheme.F -> cd_code_scheme.F
306      - separate read_checkpoint from cd_code_ini_vars.F
307      - separated cd_code part from write_checkpoint
308      - updated AD_SOURCE, generated .flow
309      - added CD_CODE_VARS.h to the_main_loop
310      - Moving cd_code specific store dir.s to pkg/cd_code
311    o ctrl package totally restructured
312      - pack/unpack now optional and decoupled from
313        xx_/adxx_ I/O
314      - ctrl_pack/unpack cleaned
315        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
316      - confined inclusion of AD_CONFIG.h to where necessary.
317    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
318    
319    checkpoint51p_post
320    o create initial cd_code package
321      - WARNING: the initialization of fields within packages
322        is broken because INI_FIELDS (where READ_CHECKPOINT is
323        called) is called *before* PACKAGES_INIT_VARIABLES.
324        This seems to be backwards since
325        1) its important to initially zero the entire field including
326           the "halo" region
327        2) zeroing needs to be done *before* reading pickup info
328           and the pickup call might or might not happen in any
329           particular run
330      - this needs an overhaul for R2
331    o cleanup verification/*/code/GMREDI_OPTIONS.h
332    o cleanup testreport
333    
334    checkpoint51o_post
335    o bringing AD-related verif's up to date with genmake2
336      - carbon/
337      - global_ocean.90x40x15/
338      - hs.94.1x64x5/
339      - (front_relax/ )
340    o (more) consistent directory structure for AD-related verif.'s
341    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
342    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
343    o bug fix in find_alpha.F for MDJWF:
344      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
345        change rho -> rho-rhoConst
346      - replace call find_rho to find_rhonum
347    o initialisation of rFlx extended to full array (required by TAF)
348      and shifted to thermodynamics
349    o removed PTRACERS.h in ptracers routine
350    o added surfacetendencyPtr to S/R parameter list pracers_forcing
351    o Correcting initialisations for fVerU, fVerV.
352    o helping TAF to recognize dependency on kUp for
353      fVerU, fVerV
354    o Replacing delZ by delR in pkg/ctrl/
355    checkpoint51o_pre
356    
357    o undid all of cp51 pending some cleanups and discussion
358    o added the [#include "AD_CONFIG.h"] statement to all files that need
359       it for adjoint/tl #defines
360     o re-worked the build logic in genmake2 to support AD_CONFIG.h
361     o removed tools/genmake since it no longer works
362    
363    checkpoint51n_post
364    o modifications to make FREEZE flux visible to pkg/kpp
365      - moved surfaceTendencyTice from pkg/seaice to main code
366      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
367      - subroutine FREEZE now limits only surface temperature
368        (this means new output.txt for global_ocean.90x40x15,
369         global_ocean.cs32x15, and global_with_exf)
370    o added surface flux output variables to TIMEAVE_STATVARS
371    
372    checkpoint51n_pre
373    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
374    o added [#include "AD_CONFIG.h"] to all files that use the following
375      defines:
376      - ALLOW_ADJOINT_RUN
377      - ALLOW_TANGENTLINEAR_RUN
378      - ALLOW_ECCO_OPTIMIZATION
379    
380    checkpoint51m_post
381    o incorporating changes to get TAMC/TAF working in genmake2
382      - added new TAMC/TAF targets to the Makefile
383      - various cleanups related to package handling
384      - these changes should have no impact on the forward model
385    
386    checkpoint51l_post
387    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
388     - faster algorithm for cal_addtime.F
389     - higher precision arithmetic, where needed
390     - pkg/exf *startdate variables changed from calendar date to
391       model integration time
392    
393    checkpoint51l_pre
394    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
395    o enable to apply restoring on S & T only in a latitude band.
396    o update output (external_forcing_surf modif. change truncation errors)
397       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
398    
399    checkpoint51k_post
400    o change default to: useNHMTerms=.FALSE.
401     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
402       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
403     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
404        exp1, ideal_2D_oce
405     - change data file of oceanic exp (leave the results unchanged for now)
406       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
407    o set gravitySign automatically according to the vertical coordinate used
408      (and change sign: back to "logical" value: +1 when R increases downward)
409    o added an include barrier to the default CPP_OPTIONS.h and
410      removed the #include "PACKAGES_CONFIG.h" from it
411    o fix a bug in mom_fluxform (from chk51j_post)
412    
413    checkpoint51j_post
414    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
415    o adjusted some flow directives (dynamics, thermodynamics)
416    o added cubed-sphere case to test cost function
417    o heckpoint_lev?_directives.h now include
418      pkg-specific directives, whenever those are enabled.
419    o Moving pkg-specific flow directives to corresponding pkg
420      Moving pkg-specific differentiation list to corresponding pkg
421      Moving pkg-specific checkpoint-lev storing to corresponding pkg
422      ---> conventions are
423           - pkg_ad.flow
424           - pkg_ad_diff.list
425           - pkg_ad_check_lev?_dir.h
426    
427    checkpoint51i_post
428    o merge of the branch-genmake2
429      - knowingly breaks the older genmake
430      - automatic generation of all ALLOW_${PKG_NAME} defines
431      - new testreport supersedes older testscript
432    o large number of package inclusion and header cleanups
433    checkpoint51i_pre
434    
435    o new output for adjoin of global ocean vector invariant
436    o fix for checkpoint of thermodynamic seaice and bulk_force
437    o Steph gchem various cleanups
438    
439    checkpoint 51h_pre
440    o fixed some single quotes
441    o modify gchem pkg to be more versatile
442    o modifications to clean up dic pkg
443    o add pkg/cfc
444    
445    checkpoint51g_post
446    o provide links for ARPACK and ADM*TLM
447    o start removing verification/vero/
448    o update AD-related stuff
449      (in particular some IF-statements in model/src/ routines)
450    o adding to verification/global_ocean.90x40x15/ adjoint of
451      vector invariant setup
452    
453    checkpoint51f_post
454    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
455    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
456      of tracer Green's fucntions for ocean inversion project.
457    
458    checkpoint51f_pre
459    o Added on-the-fly spatial interpolation capability
460        "USE_EXF_INTERPOLATION" to pkg/exf.
461      - This is a temporary Cartesian-grid hack until
462        the super-duper ESMF coupler becomes available.
463      - See verification/global_with_exf/README for usage example.
464      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
465        flags and modified pkg/seaice accordingly.
466    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
467        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
468        non-local transport term.
469    
470    checkpoint51e_post
471    o pkg/mom_vecinv:
472      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
473      - add time-ave diagnostic of vorticity advection.
474    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
475    o atmospheric geopotential: - include water vapor effect;
476                                - use p^kappa in p* scaling.
477    o land pkg: read initial state from files.
478    o AIM : add stratospheric drag in the upper level
479    
480    checkpoint51d_post
481    o change function ILNBLNK (=> last non-blank char.) to return zero
482      (instead of the string length) when the string. char is empty
483    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
484    o modif's to restore TAMC compatibility
485      - avoid "_d" constructs in PARAMETER declarations
486      - avoid interrupting lines by comment lines
487    o Use cluster local disks for purely local I/O
488      vs. globally visible disks needed for ctrl stuff
489      (merged from ecco-branch)
490      - new active_file_loc... and mdsio_..._loc routines
491      - affected packages: autodiff, ctrl, grdchk, mdsio
492    
493    checkpoint51c_post
494    o introducing integer flag debugLevel
495      - debLevZero: suppress all output
496      - debLevA: standard
497      - debLevB: equivalent to current debugMode=.TRUE.
498    o introducing pathname variable mdsioLocalDir for mdsio
499      that can be specified at runtime
500      (relevant for cluster I/O to local disk)
501    `
502    >>>checkpoint51b_post
503    adjoint of ptracers
504    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
505    o extended state in checkpoint_lev?, etc.
506    o alternative ctrl/cost with tr1 or ptracer
507    o new comlev1_bibj_ptracers
508    o new ptracers.flow
509    o made ptracers_forcing same as external_forcing_s
510    o added verification for adjoint with ptracers
511      - adm. grdchk fail so far
512      - tlm. grdchk OK
513      - checked tapelev/comlev recomputations: OK
514    <<<checkpoint51b_pre
515    
516    checkpoint51a_post
517    o added code for biogeochemistry package
518      - new pkgs: dic, gchem
519      - new subroutine in ptracers
520    o modify code for biogeo packages
521      - in model/src and pkg/ptracers
522    
523    checkpoint51
524    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
525      - autodiff, ctrl, exf, grdchk, seaice
526      kept separate packages
527      - cost, ecco, obcs
528    o updating verification/internal_wave, verification/lab_sea
529      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
530    
531    checkpoint50i_post
532    o Preparing next differentiable checkpoint and sync
533      of MAIN vs. ecco-branch
534      - 1st step: this one is differentiable
535      - 2nd step: next(! not this) checkpoint will have updated packages
536                  from ecco-branch)
537    
538    checkpoint50h_post
539    o new package "land": provide surface BC for AIM.
540    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
541    o AIM: use true log-P extrapolation for near surface temp (= as in
542        F.Molteni paper) ; update aim.5l_cs output.
543    o New variable in PARM03 for more flexible pickups
544    o somewhat cleaned package initialisation sequence for
545      ctrl/ cost/ ecco/ in packages_... routines
546    
547    checkpoint50g_post
548    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
549      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
550      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
551        made the default because of faster convergence than ADI
552    
553    checkpoint50f_post
554    o exf totally restructured
555      - replaced all exf_set_ routines by one generic exf_set_gen.F
556        and made sure it's still differentiable
557      - split exf_getffields.F into new exf_bulkformulae.F
558      - exf_inscal_/exf_outscal_ suffixes consistent with field names
559      - updated adjoint/makefile and relevant verif. accordingly
560    
561    checkpoint50f_pre
562     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
563          + change Evap over land. (update aim.5l_cs output)
564     o added missing .cvsignores and made uniform across expts
565     o changed configuration of tidal_basin_2d expt
566     o added pkg/debug functions for tracing code in fatal crashes
567     o tidied pkg/monitor to use MONITOR_OPTIONS.h
568     o new fn in pkg/monitor to stop model if solution grows too big
569     o removed lots of single quotes from comments
570    
571    checkpoint50e_post
572    o make KPP work with PTRACERS
573     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
574       nearly a copy of kpp_transport_s
575     - there is no analogue to SurfaceTendencyS, so I have to use
576       gPtr(of the surface layer) instead
577    o add a new platform SunFire+mpi (SunFire 15000) to genmake
578    checkpoint50e_pre
579    
580    checkpoint50d_post
581    o change kpp output from multiple-record state files to single-record state
582      files analogous to write_state.F
583    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
584      analogous to the cg2d-related output.
585    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
586      so that writing to internal file fn (with length 512) fails.
587    checkpoint50d_pre
588    
589    checkpoint50c_post
590    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
591    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
592    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
593    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
594    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
595    
596    checkpoint50c_pre
597    Merging from release1_p13:
598    o bug fix for pkg/seaice dynamic solver
599    o Added SEAICE_initialHEFF to pkg/seaice
600    
601    checkpoint50b_post
602    o store u*,v* in gU,V instead of in guNm1,gvNm1
603    o in order to put the momForcing out of the Adams-Bashforth:
604      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
605      to timestep.F
606    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
607    o re-generate output for highly sensitive test-exp:
608       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
609    
610    checkpoint50b_pre
611    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
612    o corrected CPP option mismatch in exf_Bulk... functions for case
613      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
614    
615    checkpoint50a_post
616    o Bug fix for merging between c50 and KPP.
617      ikey was passed from thermodynamics to kpp_calc via
618      common block rather than being recomputed in kpp_calc,
619      in contradiction with new key itdkey.
620      New key ikppkey created, and tamc.h headers updated.
621    
622    checkpoint50
623    - 2nd step of merge with ecco-branch:
624      merge changes in ecco-branch back into main trunk
625    - bug fix in find_alpha
626    - more storing in gmredi_calc_tensor.F, kpp_routines.F
627    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
628    - merged some sliced AD support routines
629    
630    checkpoint49
631    merged from ecco-branch:
632    o exf:
633      - Enable initialisation of forcing fields to constant
634        (runtime) values.
635      - in exf_getffields.F
636        Reduce i-/j-loop to interior domain, discarding overlaps.
637        That also fixes wrong TAF-key computations for key_1, key_2
638        with bulf formulae.
639      - exf_init.F modify #ifdef for exf_init_evap
640      - exf_getffieldrec.F, ctrl_getrec.F
641        The following INT-usages are not safe:
642          fldsecs  = int(fldsecs/fldperiod)*fldperiod
643          fldcount = int(fldsecs/fldperiod) + 1
644        and were modified.
645    o autodiff: checkpoint_lev...
646      - updated storing for bulk formulae (some arrays were missing)
647      - added state for seaice package
648      - synchronized with main branch
649    o DIVA:
650      Modif.s in
651      - the_main_loop.F
652      - the_model_main.F
653      and added cost_final_restore.F cost_final_store.F
654      o With these changes, it is possible to fully separate
655        the first forward run to compute the cost function (mdthe_main_loop)
656        and adjoint runs over individual DIVA intervals (adthe_main_loop)
657        into separate model executions.
658        This enables better tuning of DIVA to given queue sizes.
659      o Loss of cost function value in consecutive DIVA runs is
660        fixed by storing to 'costfinal' file.
661      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
662        beginning/end of adjoint integration is accounted for.
663      The current changes apply to TAF-1.4.26.
664      TAF has one remaining bug, requiring one manual change
665      (see MITgcm manual).
666    o cal: synchronized between MAIN and ecco-branch
667    
668    checkpoint48i_post
669    o Changes to restore differentiability of code w.r.t. previous tag
670      (mostly adding new routines to make list and replacing
671      pressure by totPhiHyd).
672    o Updated and merged grdchk package
673      - has both ADM and TLM checks
674      - works for single- and multi-proc.
675      - output cleaned
676      - worked successfully for parallel DIVA
677    o genmake:
678      - Adding -platform=SP4
679      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
680    o Modif. for DIVA:
681      ctrl_unpack should not be called in intermediate DIVA interval.
682      (similar thing would apply for active files such as
683      tbar, sbar, psbar, which should not be reinitialised;
684      only relevant for ecco-branch)
685    
686    checkpoint48h_post
687    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
688    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
689    o Added SEAICE_initialHEFF to pkg/seaice
690    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
691    
692    checkpoint48g_post
693    --- EOS:
694    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
695      store total Potential in totPhyHyd for diagnostics & EOS.
696    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
697    --- Pressure/geopotential gradient:
698    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
699    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
700      ( changes results of global_ocean_pressure )
701    o NLFS + z-coord.: add eta*Rho' contribution.
702    o accurate phiHyd when using interface-W at the middle between 2 centers
703     ( changes results of ideal_2D_oce )
704    o includes r* 2nd term in potential gradient.
705    
706    checkpoint48f_post
707    Merging from release1_p12:
708    o Modifications for using pkg/exf with pkg/seaice
709      - improved description of the various forcing configurations
710      - added basic radiation bulk formulae to pkg/exf
711      - units/sign fix for evap computation in exf_getffields.F
712      - updated verification/global_with_exf/results/output.txt
713    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
714      (SBO) core products, including oceanic mass, center-of-mass,
715      angular, and bottom pressure (see pkg/sbo/README.sbo).
716    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
717      to avoid negative values in shallow regions.
718      - updated verification/natl_box/results/output.txt
719      - updated verification/lab_sea/results/output.txt
720    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
721    o Added useSingleCpuIO option (see PARAMS.h).
722    o Updated useSingleCpuIO option in mdsio_writefield.F to
723      work with multi-field files, e.g., for single-file pickup.
724    o pkg/seaice:
725      - bug fix in growth.F: QNET for no shortwave case
726      - added HeffFile for specifying initial sea-ice thickness
727      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
728    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
729      kpp_transport_t.F, forward_step.F, and the_main_loop.F
730    o pkg/seaice:
731      - adjoint-friendly modifications
732      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
733    
734    checkpoint48e_post
735    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
736    o dynamics: change definition of computational domain & adapt mom_fluxform
737      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
738    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
739        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
740        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
741        global_ocean.90x40x15 global_with_exf global_ocean_pressure
742        inverted_barometer solid-body.cs-32x32x1
743      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
744    
745    checkpoint48d_post
746    o in preparation for r*:
747     a) use pre-computed gradient of hydrostatic potential:
748        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
749     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
750        => affects results of glob_oce_pressure (different truncation error)  
751      update output.txt of ideal_2D_oce & global_ocean_pressure
752    
753    checkpoint48d_pre
754    o in preparation for r*:
755      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
756      pass the 2 comp. of the grad. as arguments to momentum S/R.
757      but for the moment, only used if it does not change the results.
758    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
759    
760    checkpoint48c_post
761    Modifications in treatment of initial flux forcing controls
762    to avoid extra storing of flux fields.
763    
764    checkpoint48c_pre
765    o Added tidal_basin_2d experiment (currently 1D!)
766    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
767    
768    checkpoint48b_post
769    o r* coordinate added in #ifdef NONLIN_FRSURF block.
770     (modification to pressure gradient not yet implemented)
771    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
772      (for U & V) that are used for vertical advection of momentum.
773    
774    checkpoint48a_post
775    o In preparation for r*, use temp. array to compute vertical transport
776       in flux-form momentum pkg. => change results of few test-exp.
777      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
778                        lab_sea, natl_box & plume_on_slope
779    
780    checkpoint48
781    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
782    
783    checkpoint47j_post
784    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
785    o moved adexch from forward_step to addummy_in_stepping
786    o added exch in ctrl_map_...
787    o aveFreq.=0. at end of cost_final to avoid overwrite in
788      reverse checkpointing loop
789    o Yet more changes in gmredi:
790      * adgmredi_calc_tensor
791        avoiding all recomputation of gmredi_slope_limit
792      * adgmredi_x/y/rtransport
793        added flag for excessive storing to avoid recomp. of
794        u/v/rtans, dTdx/y/z
795        -> this is not really necessary and very memory-consuming
796      * adgmredi_slope_psi:
797        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
798      * gmredi_slope_limit
799        re-activated full calculation of taperfct for case 'ac02'
800    o updating verification/ adjoints of carbon, global_ocean.90x40x15
801    
802    checkpoint47i_post
803    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
804    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
805      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
806    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
807    o gmredi: fix few bugs.
808    
809    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
810    This will be a good checkpoint to plug into the ecco-branch.
811    o few modif.'s to get latest version adjointed
812      (mainly kick out code in ini_linear_phisurf)
813    o modif's to run adjoint with exactConserv
814    o case GM_BOLUS_ADVEC should be cleaned
815      S/R gmredi_slope_psi should be cleaned
816    o verification/carbon now has exactConserv=.TRUE.
817    
818    checkpoint47g_post
819    o time-average AIM output: becomes independent from statvars time-average
820      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
821    o After TAF bug fix:
822      Tested adjoint of gmredi package.
823      Tests were done with checkpoint47 rather than with latest
824      checkpoint47f_post since the latter is broken for the adjoint
825      verification/carbon/ contains both ADM and TLM gradient checks.
826    Here they are, before they get changed/lost/stolen.
827    Mostly modif.'s to fix numerical sensitivities.
828    Gradient checks OK for
829    - GM_taper_scheme:
830      * clipping
831      * ac02
832      * linear
833      * glw91
834      * dm95
835      * ldd97
836    - GMREDI_OPTIONS:
837      * GM_VISBECK_VARIABLE_K
838      * GM_NON_UNITY_DIAGONAL
839      * GM_EXTRA_DIAGONAL
840      * GM_BOLUS_ADVEC
841    in conjunction with data.gmredi parameters to be checked in
842    in a few minutes under verification/carbon/code/
843    
844    checkpoint47f_post
845    Merging from release1_p10:
846    o modifications for using pkg/exf with pkg/seaice
847      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
848        and SEAICE_EXTERNAL_FLUXES
849      - pkg/exf CPP options EXF_READ_EVAP and
850        EXF_NO_BULK_COMPUTATIONS
851      - usage examples are Experiments 8 and 9 in
852        verification/lab_sea/README
853      - verification/lab_sea default experiment now uses
854        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
855    
856    checkpoint47e_post
857    o created a tag prior to creating a branch
858    
859    checkpoint47d_post
860    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
861      at the bottom boundary had an erroneous half slip boundary condition
862    o added bottom drag and no slip boundary condition capabilities to
863      oceanic pressure coordinates code
864    o added new verification experiment global_ocean_pressure, this experiment is
865      also described in the tutorial section of the manual
866    checkpoint47d_pre
867    
868    checkpoint47c_post
869    o Added a verification experiment for a global cubed-sphere ocean run
870      -  verification/global_ocean.cubed32x32x30
871      -  uses pkg/therm_seaice and pkg/bulk_forcing
872    
873    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
874    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
875      when using P-coordinate; only implemented for atmospheric config.
876    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
877      NOTES: requires option NONLIN_FRSURF to be "#define".
878    o update advect_xz/results/output.txt (left from checkpoint44g_post)
879    
880    checkpoint47b_post
881    Merging from release1_p9:
882    o pkg/seaice
883      - removed GOTO's and added taf directives
884      - double precision constants to reduce the g77 (Linux)
885        to F77 (SGI) differences reported in release1_p8
886    o tools/genmake
887      - added SGI options
888    o verification/testscript
889      - updated to that of checkpoint47a_post
890    o verification/global_ocean.90x40x15/input/eedata
891      - modified for SGI f77 compatibility
892    o verification/lab_sea
893      - added description of sea-ice model
894      - added missing matlab routines
895      - added test of thermodynamics parallelization
896    
897    checkpoint47a_post
898    o new pkg: aim_v23
899     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
900       for now, keep the same surface forcing as before.
901     - Part-Cell implemented into AIM; check that Heat & Water are conserved
902     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
903     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
904    o add diagnostic of surface correction term in monitor output
905    
906    o bulk_force and therm_seaice
907    - Two packages:  bulk_force (Bulk forcing)
908      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
909    - Earlier integration from Stephaine Dutkiewicz
910      and Patrick Heimbach.
911    - Two ifdef statements for compile time,
912       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
913    
914    checkpoint47
915    differentiable version of checkpoint46n_post
916    o bug fix in quasihydrostaticterms
917    o * "clean" adjoint code (in terms of extensive recomputations)
918        can now be obtained for all GMREDI options (i.e. for
919        - GM_VISBECK_VARIABLE_K
920        - GM_NON_UNITY_DIAGONAL
921        - GM_EXTRA_DIAGONAL
922        - GM_BOLUS_ADVEC )
923      * However, wrong gradient check problem remains unsolved.
924      * New CPP options have been introduced for different
925        tapering schemes
926    o external_fields_load now part of differentiation list
927    o pressure needs multiple storing;
928      would be nice to have store_pressure at beginning or
929      end of forward_step, e.g. by having phiHyd global (5-dim.)
930      (NB: pressure is needed for certain cases in find_rho,
931      which is also invoked through convective_adjustment).
932    o recomputations in find_rho for cases
933     'JMD95'/'UNESCO' or 'MDJWF' are OK.
934    o #define ATMOSPHERIC_LOADING should be differentiable
935    o ini_forcing shifted to begining of initialise_varia
936    o Incorporating QNVS line search routines into MITgcm
937      (this is separate code, and therefore not under pkg)
938      lsopt/, optim/
939    o Updated verification/carbon/
940      - #define GM_VISBECK_VARIABLE_K
941      - GM_taper_scheme    = 'ldd97'    
942    
943    checkpoint46n_post
944    Merging from release1_p8:
945    o verification/natl_box:
946      updating new external_fields_load routine
947    o New package: pkg/seaice
948      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
949      The sea-ice code is based on Hibler (1979-1980).
950      Two sea-ice dynamic solvers, ADI and LSR, are included.
951      In addition to computing prognostic sea-ice variables and diagnosing
952      the forcing/external data fields that drive the ocean model,
953      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
954      The implied surface heat flux is then stored in variable
955      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
956      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
957      non-local transport term.  Because this call precedes model
958      thermodynamics, temperature under sea-ice may not be "exactly" at
959      the freezing point by the time theta is dumped or time-averaged.
960      N.B.: fairly large differences in accuracy occur across
961            different platforms/compilers; comparison between
962            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
963            generated output gives:
964       T           S           U           V
965      C D M    c        m  s        m  s        m  s        m  s
966      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
967      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
968      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
969    
970      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
971    o GAD:
972      - generated new common blocks to account for call of
973        same gad routines with differing traceridentities
974        (needed to modify tracerIdentity indices in GAD.h)
975      - generated separate common blocks for case useCubedSphereExchange
976        (Department of Futurology)
977      - parameter lists to gmredi_?transport: added tracerIdentity
978      - added new key indices to tamc.h
979    o external_fields_load:
980      - added this routine to TAF list
981      - needed to make some common blocks global and additional storing
982        along the same lines as exf package (checkpoint_lev?_directives.h)
983    o exf:
984      updated external forcing package
985      - bug fixes carried over from ecco-branch
986        (missing OBCS_OPTIONS.h in two routines)
987      - enable easy to use "no forcing".
988      - added exf I/O for atmospheric loading
989      - added exf I/O for runoff data
990      - transfered scaling between exf <-> MITgcm to exf namelist
991    o Adding new verification experiment global_with_exf.
992      This verification experiment is almost identical to the
993      global_ocean.90x40x15 experiment, except that it uses
994      the exf (and cal) package instead of the
995      external_fields_load routine (cf README file).
996    
997    checkpoint46m_post
998    o modified testscript to return -- when there are no lines of "%MON" output
999    o added new flag "quasiHydrostatic" for QH mode
1000      and new routine quasihydrostaticterms()
1001    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1002      New routine: mom_u_coriolis_nh()
1003    o fixed sign of non-hydrostatic metric terms in u and v equations.
1004      Depend on correct sign of gravitySign.
1005    o added work.pc* to .cvsignore in aim directories using ifc
1006    o introduced flag for controllin non-hydrostatic metric terms
1007    o removed gravitySign from PARM04
1008    o switched to g77/ifc from pgf77 in aim experiments
1009    
1010    checkpoint46l_post
1011    o made convective adjustment work with pressure coordinates:
1012     - changed the direction of k-loop in convective_adjustment.F for the
1013       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1014     - adjusted the reference pressure k-index in convective_adjustment.F
1015     - adjusted the convection condition in convect.F (in analogy to
1016       calc_ivdc.F)
1017     - convective_adjustment no longer computes anything on the halos
1018     - removed the warnings about negative salinity from find_rho.F and
1019       find_alpha.F; instead the new routine look_for_neg_salinity, called
1020       at the beginning of find_rho, find_alpha, and find_beta, does a
1021       check of the entire slice, if CPP-option
1022       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1023    checkpoint46l_pre
1024    
1025    checkpoint46k_post
1026    o fixed the verification/global_ocean.90x40x15 experiment:
1027     - new bathymetry (the world according to A., JMC, and M.)
1028     - new initial fields and forcing fields (*.bin files)
1029     - new POLY3.COEFFS (for the next release one should switch to a full
1030       equation of state: JMD95P or MDJWF)
1031     - fixed several errors and redundancies in the data file
1032     - experiment uses looped cells
1033     - added matlab directory with diagnostic scripts for plotting of output
1034    
1035    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1036     - read AIM physics parameters from a file (data.aimphys)
1037     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1038    
1039    checkpoint46j_post
1040    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1041    o move wVel computation at the end of the time step, in S/R integr_continuity
1042    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1043    o update timeave pkg for wVel diagnostic.
1044    checkpoint46j_pre
1045    
1046    checkpoint46i_post
1047    o Clean up AIM package (and keep the results unchanged):
1048      include CPP_OPTION and use IMPLICT NONE in all routines ;
1049      declare all the variables _RL ; use _d 0 for all numerical constants.
1050      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1051    
1052    checkpoint46h_post
1053    o cleaned up the use of rhoNil and rhoConst.
1054      - rhoNil should only appear in the LINEAR equation of state, everywhere
1055        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1056        and the dynamical equations are all divided by rhoConst
1057    o introduced new parameter rhoConstFresh, a reference density of fresh
1058      water, to remove the fresh water flux's dependence on rhoNil. The default
1059      value is 999.8 kg/m^3
1060    o cleanup up external_forcing.F and external_forcing_surf.F
1061      - can now be used by both OCEANIC and OCEANICP
1062    checkpoint46h_pre
1063    
1064     Added code to convert surface volume flux (fresh water) into
1065     a mass flux when using P coordinates in the ocean (OCEANICP).
1066     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1067    
1068    checkpoint46g_post
1069    o Include a new diagnostic variable phiHydLow for the ocean model
1070      - in z-coordinates, it is the bottom pressure anomaly
1071      - in p-coordinates, it is the sea surface elevation
1072      - in both cases, these variable have global drift, reflecting the mass
1073        drift in z-coordinates and the volume drift in p-coordinates
1074      - included time averaging for phiHydLow, be aware of the drift!
1075    o depth-dependent computation of Bo_surf for pressure coordinates
1076      in the ocean (buoyancyRelation='OCEANICP')
1077      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1078        Theta, Salinity, and Pressure in the parameter list. This routine is
1079        presently contained in find_rho.F. This routine does not give the
1080        correct density for 'POLY3', which would be a z-dependent reference
1081        density.
1082    o cleaned up find_rho
1083      - removed obsolete 'eqn' from the parameter list.
1084    o added two new verification experiments: gop and goz
1085      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1086    checkpoint46g_pre
1087    
1088    checkpoint46f_post
1089    o Enable tangent linear (forward mode) gradient checks:
1090      - extended active file handling to g_... files
1091      - added TANGENT_SIMULATION to theSimulationMode
1092      - extended grdchk package accordingly
1093    o added tangent linear setup in verification/carbon/code_ftl
1094    o added adjoint setup in verification/front_relax/code_ad
1095    
1096    checkpoint46e_post
1097    o Added new equation of state -> MDJWF
1098      - EOS of McDougall et al., 2002, JAOT, submitted
1099      - caveat: the equation of state is only valid for a smaller (more
1100        realistic?) range of values than JMD95P/Z and UNESCO
1101      - added masks to the calculation of pressure in store_pressure
1102      - added more check values for density in check_eos (ini_eos.F), some of
1103        the old check values are out of the range of the MDJWF-eos, so don't
1104        expect perfect matches for those
1105    checkpoint46e_pre
1106    
1107    checkpoint46d_post
1108    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1109      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1110      case of pressure coordinates. eosType='JMD95Z' in
1111      combination with buoyancyRelation='OCEANICP' now causes an error.
1112    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1113      in find_alpha/beta.
1114    checkpoint46d_pre
1115    
1116    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1117      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1118    
1119    checkpoint46c_post
1120    o Changes necessary for ocean in p-coordinates
1121     -  Added new buoyancy relation = 'OCEANICP'
1122     -  Added new parameters = gravitySign (this used to be contained inside
1123        the factor dRdZ which I added when we first switched to R coordinates).
1124     X GM/Redi is not compatible (yet)
1125     X bottom drag and no-slip need to be debugged.
1126    checkpoint46c_pre
1127    
1128    checkpoint46b_post
1129    o Added new equation of state -> JMD95Z and JMD95P
1130      - EOS of Jackett and McDougall, 1995, JAOT
1131      - moved all EOS parameters into EOS.h
1132      - new routines ini_eos.F, store_pressure.F
1133    o Added UNESCO EOS, but not recommended because it requires
1134      in-situ temperature (see JMD95)
1135    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1136      unesco.f to be used with POLY3
1137    checkpoint46b_pre
1138    
1139    checkpoint46a_post
1140    o Added (atmospheric) pressure loading
1141      - new field in FFIELDS.h, etc...
1142      - new cpp flag ATMOSPHERIC_LOADING
1143    o Changed hFacC to _hFacC in calc_phi_hyd.F
1144    o Added SHORTWAVE_HEATING to some files for consistency
1145    checkpoint46a_pre
1146    
1147    checkpoint46
1148    further merges from release1_p5
1149    o new ctrl package
1150      - adopted from ECCO environment to enable optimization
1151      - added Eliassen Palm fluxes to controls
1152    o added Eliassen Palm flux controls to gradient check package
1153    o cost package
1154      - Compatible with new ctrl package
1155      - added Eliassen Palm cost hooks
1156      - modif's of existing cost functions
1157    o Adjoint-related bug fixes in kpp:
1158      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1159      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1160    o autodiff package
1161      - flow directives:
1162        + new for S/R do_the_model_io
1163        + enhanced for S/R checkpoint
1164        + new gmredi.flow
1165      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1166        disable adcommon.h/g_common.h by default.
1167      - fixed problem for adjoint of global_max
1168    o modified verification/carbon/
1169    o New setup for adjoint of global_ocean
1170    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1171    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1172    o incorporated hooks for sponge layer code (external_forcing.F)
1173    
1174    checkpoint45d_post
1175    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1176    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1177      (affects plume_on_slope "cg2d" output)
1178    o add new parameter deltaTfreesurf for free-surface time stepping
1179    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1180    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1181    o change phiMin in exp1 (to agree with documentation)
1182    o add new flags:
1183     - T,S forcing inside/outside Adams-Bashforth
1184     - turn off temp,salt advection and/or forcing
1185     - for each tracer, define internal flag for multiDimAdvection & A-B
1186    o monitor: change definition of KE to check conservation of Energy
1187    
1188    checkpoint45c_post
1189    o Removed f90 comments ("!")
1190    o Modified initialisations to enable exf package for MITgcm
1191      (without invoking ECCO_PACKAGE).
1192    o modifications to gradient check package (Martin Losch)
1193      - enable centered differences
1194      - modified format of standard output
1195    
1196    checkpoint45b_post
1197    o cleaned exchange calls in cg2d
1198    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1199    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1200      to configure barotropic setup (Martin Losch)
1201    o moved some initialisations within bi,bj loop in dynamics
1202      (TAF flow dependency)
1203    o in initialise_varia, moved call packages_init_variables
1204      before convective_adjustment_init
1205      (corresponding adjustment of TAF tape initialisation).
1206    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1207    
1208    checkpoint45a_post
1209    o compute Rho over the whole domain (extend iMin,jMin indices)
1210    o specific exchange for X-slice domain (case Ny=1)
1211    o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1212    o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1213    
1214    checkpoint44h_post = checkpoint45
1215    o Fix to restore differentiability:
1216      place at which packages_init_variables is called in
1217      initialise_varia is crucial for reverse control flow.
1218    o modifications in GMRedi to enable stable adjoint
1219      (corresponding modif's in thermodynamics, dynamics)
1220    o added missing hook for sponge layer code in external_forcing
1221    o modified test cost functions
1222    o storing in gad_advection (plus removal of write(0,*)!
1223    o missing headers TR1.h added in convective_adjustment routines
1224    o errorMessageUnit set non-equal zero in eeboot
1225      (conflict on some platforms, e.g. IBM SP3)
1226    o modified carbon verif.
1227    
1228    checkpoint44h_pre
1229    o vertical grid option: allow to put the Interface at the middle between
1230      2 cell-centers ; replace delZ in pkg/kpp by drF.
1231    o GM Advective form: Tracers are advected using the residual transport (=
1232      Euler+GM-bolus); set param GM_AdvSeparate=T to return to previous form.
1233    
1234    checkpoint44g_post
1235    o fix surface correction term in multiDimAdvection (affects plume_on_slope
1236      results) ; ifdef missing in thermodynamics.F
1237    
1238    checkpoint44f_pre,checkpoint44f_post
1239    o added PTRACERS package
1240      This allows an arbitrary number of passive tracers to be integrated
1241      forward simultaneously with the dynamicaly model.
1242      + Implemented so far:
1243        - basic forward algorithm (time-stepping, advection, diffusion, convection)
1244        - I/O and checkpointing
1245        - GM/Redi  *but*  using the GM/Redi coefficient of Salt
1246      + Not implemented so far:
1247        - KPP
1248        - OBCS
1249      + No specific example supplied (yet) but global_ocean.90x40x15 has the
1250        necessary data.ptracer file. Simply use -enable=ptracers and uncomment
1251        line in data.pkg.
1252      + This package is disabled by default since it increases storage.
1253    
1254    
1255    o testscript: added -cleanup option
1256    o Shap_filt: a) new shap_filt S/R to use no-slip BC with S2 filter
1257                 b) enable to filter 2D fields.
1258    
1259    checkpoint44e_pre,post
1260    o re-wrote convective adjustment to use pre-calculated weights
1261      Affects: model/src/convective_adjustment.F, convective_adjustment_ini.F
1262      Adds:    model/src/convective_weights.F, convectively_mixtracer.F
1263      Original calls to convect() still in place.
1264    
1265    chkpt44d_pre,post
1266    o added missing EXCLUDE_MONITOR flags
1267    o changed "e" to "_d" in gmredi_slope_limit, gmredi_slope_psi
1268      (incompatible typ in MIN/MAX expressions caused problems
1269      on IBM SP3)
1270    o in genmake added variable MAKEDEPEND
1271      plus resetting for case SunOS
1272    o added timer_stats.c routine for IBM SP3
1273    o removed variables in dynamics
1274    !!! I forgot to create tag chkpt44d_pre !!!
1275    !!! But chkpt44d_pre = chkpt44c_post    !!!
1276    
1277    o real fresh water flux implemented with non-linear free-surface.
1278    
1279    chkpt44c_pre,post
1280    o few fix (mask in shap_s2, EmPmR in external_field_load,
1281      USE_NATURAL_BCS in solve_for_P);
1282    o add arguments myIter & myTime to S/R obcs_calc & solve_for_P
1283    
1284    checkpoint44b_pre/_post
1285    o merge of relevant stuff from the ecco-branch:
1286      - genmake: removed $S64 overwrite for case SunOS
1287      - pkg/exf: update and corrections for field swapping and obcs
1288      - pkg/ecco: parameter lists for the_model_main, the_main_loop
1289                  harmonized between ECCO and MITgcm
1290      - pkg/autodiff: added flow directives for obcs, mdsio_gl_slice
1291                      updated checkpointing_lev... lists for obcs
1292      - model/src: minor changes in forward_step, plot_field
1293                   added directive for divided adjoint in the_main_loop
1294      - pkg/mdsio: added mdsio_gl_slice
1295    
1296    o check parameters & config (chkpt44a_pre,post)
1297    o OBC and NonLin_FrSurf.
1298    
1299    checkpoint44
1300    o fix bug in mom_vi_del2uv
1301    o select when filters are applied ; add options to zonal_filter (data.zonfilt)
1302    o gmredi: fix Pb in the adiabatic form ; add options (.e.g. Bolus advection)
1303    o update AIM experiments (NCEP input files)
1304    o improve and extend diagnostics (Monitor, TimeAve with NonLin-FrSurf)
1305    o added some stuff for AD
1306    
1307    checkpoint43
1308    o added two new advection tests
1309    o added global 4x4 degree ocean test
1310    o added test of H&S94 with free surface on cube
1311    o some final mods for gradient check, adjoint,...
1312    
1313    checkpoint42
1314      Fixed AD-related problems:
1315    o Store directives up-to-date with re-arranged Adams-Bashforth
1316      (mainly thermodynamics.F)
1317    o New store directives for multi-dim. advection schemes
1318      * new CPP flag ALLOW_MULTI_DIM_ADVECTION
1319      * new common block and key passkey
1320      (mainly gad_advection.F)
1321    o Modified store directives for split of dynamics/thermodynamics
1322      for the case ALLOW_KPP
1323    o Cleaned argument list for timestep_tracer.F
1324    
1325    checkpoint41
1326    o re-formatted/added comments in prologues of key subroutines
1327      to work with protex
1328    
1329    checkpoint40
1330    o moved calc_gs, calc_gt and calc_tr1 back to model/src
1331    o added FLT (floats) package from Arne along with demo. experiment
1332    o re-arranged Adams-Bashforth scheme for tracers to allow easier
1333      implementation of forward-in-time forcing terms
1334    o more mods for non-linear free-surface including new variable
1335    o modified multi-dim method to work on cube
1336    o bug fix in KPP (from DM)
1337    
1338    checkpoint40pre9
1339    o added DST advection schemes
1340    o fix MPI bug on SGI's
1341    o modifications for non-linear free-surface
1342    o fixed conditionals for fixed flow/passive tracer only mode
1343    o added tension/strain form of stress tensor
1344    o changes to commenting of arguments for TAF/TAMC
1345    o added/updated many matlab scripts
1346    o added multi-dimensional advection method for tracers
1347      
1348    checkpoint40pre8
1349    o new package rw/
1350      Added method for dumping intermediate local arrays:
1351      mdsio_writetile - same as mdsio_writefield except works from inside
1352                        bi,bj loop
1353      mdsio_writelocal - same as mdsio_writetile except works for local
1354                         arrays
1355      write_local_r? - higher-level wrapper for mdsio_writelocal
1356      Controlled by diagFreq. Defaults to zero (ie. no dumps)
1357      Example given at end of mom_vecinv.F that dumps some local arrays.
1358    o replaced calc_mom_rhs.F by mom_fluxform.F/mom_vecinc.F to
1359      control flux-form versus vector invariant code.
1360      Switch is runtime flag vectorInvariantMomentum (defaults to false)
1361      or genmake -DISABLE ...
1362    o TAMC-related update to cope with mom_fluxform.F/mom_vecinc.F
1363      (additional storing is now needed for case vecinv;
1364      currently nothing implemented to switch this storing off
1365      in case fluxform is used since no CPP flag available).
1366    
1367    checkpoint40pre7
1368    o bug fix in dynamics.F
1369      calc_viscosity called before k=1,Nr loop.
1370    o added some #ifdef's ALLOW_PASSIVE_TRACER
1371    o cleaned initialisations in ctrl_map_ini
1372      related to TAF
1373    
1374    checkpoint40pre6
1375    o split dynamics into thermodynamics & dynamics
1376    o corresponding split of calc_diffusivity into
1377      calc_diffusivity, calc_viscosity
1378      (kpp_calc_diff, kpp_calc_visc).
1379    o Added diffkr, kapgm to control variables
1380    o bug fix in gmredi_slope_limit for ldd97
1381    
1382    checkpoint40pre5
1383    o proper initialization of Adams-Bashforth time stepping
1384      + uses forward step for very first step of model (iter=0)
1385    o re-generated *all* output since almost all output is modified by this
1386      change (sorry but we've been putting this one off for about 2 years)
1387      + natl_box, aim.5l_Equatorial_Channel and aim.5l_zon-ave were
1388        *not* regenerated since they are already out of date and I don't
1389        want to create the impression that they are suddenly working.
1390    o removed KAP stuff for DEC's
1391    o modified/added many .cvsignore files in */code and */input
1392    o added new expt "solid-body.cs-32x32x1"
1393      + this uses an alternative form of ini_curvilinear_grid.F which
1394        is not necessarily any better than the current one...
1395    
1396    checkpoint40pre4
1397    o added re-initialisations of utrans,vtrans,rtrans in
1398      calc_common_factors which are crucial for TAF.
1399    o extended iMin,jMin range for calc_common_factors,
1400      calc_diffusivity
1401    o added option ALLOW_PASSIVE_TRACER
1402    o a few minor updates and fixes
1403    
1404    checkpoint40pre3
1405    o created calc_gtr1.F for gad package
1406    o split the_main_loop and re-introduced forward_step
1407    o some recomputations of nIter0 for TAMC
1408    
1409    checkpoint40pre2
1410    o Updated to latest branch of AJA, JMC
1411    o Added gradient check package
1412    o Added routines for passive tracer handling
1413    o Added carbon sequestration sensitivity experiment
1414    
1415    checkpoint39
1416     o Modifications and fixes to support TAMC
1417       (mainly missing or wrong directives)
1418     o Corrected common blocks when fooling TAMC to produce adjoint I/O
1419       in addummy_in_stepping
1420     o Updated verification/vero/ (bug fixes in code/, correct pickups in input/)
1421     o Enabled "sliced" (xz-,yz-) exchanges, needed for obcs.
1422     o Included following packages:
1423       cal: calendar
1424       exf: external forcing
1425       ecco: essential routines to control use of cal, exf
1426             (NB: this is not the full ECCO environment)
1427     o disabled some packages by default in genmake
1428    
1429    checkpoint38
1430     o see notes_c37_adj.txt
1431     o corrected wrong layer index in external_forcing_t
1432     o replaced the_main_loop/forward_step by the_main_loop
1433     o removed forceoutput from write_state
1434       (replaced criteria for initial/final state)
1435     o added runtime flag for pre-C35 pickups: usePickupBeforeC35
1436    
1437    checkpoint37
1438     o mdsio.F routine split and packaged in pkg/mdsio
1439       (mdsio.F and mdsio_gl.F still exist in eesupp/src but are not
1440        used unless genmake -disable=mdsio)
1441     o allow a more precise surface-geopotential gradient for the atmosphere
1442       taking into account the change in space of Alpha (=1/rho) at the surface.
1443     o variable "etaN" (replace cg2d_x) is the surface R-anomaly [r unit]
1444       (ocean: sea surface height [m] / atmos: surface pressure anomaly [Pa])
1445     o Change units: Phi_Hydrostatic (=phiHyd), Phi_Surface(=cg2d_x) and
1446       Phi_NonHydrostatic (=cg3d_x), all have now the dimension of a potential
1447       [m2/s2] (pressure/rhoConst in the ocean ; Geo-Potential in the atmosphere).
1448     o Time-Average diagnostics defined as a pseudo package "timeave".
1449     o pickup files : old pickup (before c35) did not work with new code (c35
1450       and after) unless activating 2 commented lines in initialise-varia.
1451     o Non-Hydrostatic pickup file Pb fixed.
1452     o bug with Rigid-lid version (since c35) fixed.  
1453    
1454    checkpoint36
1455     o implement Crank-Nickelson barotropic time-stepping
1456     o recover Time-Average diagnostics
1457     o fix Pb in checkpoint (PR#19)
1458     o AIM become a standard package ; clean unused CPP_kees
1459    
1460    checkpoint35
1461     o subtantial rewrite of dynamics.f
1462     o allows staggered time-stepping
1463     o packaged obcs, aim (Atmospheric Physics), zonal_filt, shap_filt
1464     o added bottom drag (linear + quadratic)
1465    
1466    checkpoint34
1467     o Modified exchange routines for correct reverse simulation.
1468     o Added verification output to comply with bug fix in impldiff.F
1469       as of c33 (exp2, natl_box).
1470     o Corrected store directives in dynamics.F
1471     o Corrected array boundaries in impldiff.F
1472     o Corrected array dimensions in gmredi.
1473       Added temporary scalars to avoid storage by TAMC (gmredi, kpp).
1474     o Added routine GLOBAL_SUM_INT to global_sum.F
1475     o Added mdsio_gl.F for ECCO purposes.
1476    
1477    checkpoint33
1478     o Fixed bug in lower BC in impldiff.F
1479     o Fixed confusion about units of forcing arrays in FFIELDS.h
1480       namely Fu,Fv,Qnet,Qsw,EmPmR:
1481       - Removed verification/natl_box/code/external_fields_scale.F
1482         (did not differ from that in model/src)
1483       - Changed units of fu,fv,Qnet,Qsw,EmPmR back to proper units
1484         (see FFIELDS.h for description)
1485       - Scale fu,fv,Qnet,Qsw,EmPmR when used in external_forcing_surf.F,
1486         kpp_calc.F and kpp_transport_t.F
1487       - Removed model/src/external_fields_scale.F and calls to it
1488       - verification/natl_box uses flux data with "atmospheric" sign so
1489         a special version of external_fields_load.F is used to
1490         change the data as it's read in. This way, the arrays
1491         have the right units and signs at all times tha a user could
1492         possibly use them.
1493     o Corrected genmake to delete a temporary file during configuration
1494    
1495    checkpoint32
1496     o Scaling of forcing fields moved from external_forcing.F to
1497       external_fields_scale.F, called directly after loading fields.
1498     o Surface relaxation terms added to surface tendency fields in
1499       extra subroutine.
1500     o impldiff.F changed to avoid storing by TAMC of huge intermediate
1501       fields.
1502     o Changes in GMRedi to comply with packaging structure.
1503     o Modifications and bug fixes in KPP package.
1504     o Verification experiment for KPP added (verification/nat_box/)
1505    
1506    checkpoint31
1507     o Packages interface brought in line with defined standard
1508       -> new routines packages_...F
1509       -> changes in initialise_fixed.F, initialise_varia.F
1510       -> enables initialisation interface for ECCO package
1511     o Rescaling of external forcing fields immediately after read
1512       (removed from external_forcing.F)
1513       -> new: surface_fields_scale.F
1514       -> affects ini_foorcing.F, external_fields_load.F
1515     o Computation of surface tendencies before tendency updates.
1516       -> new: external_forcing_surf.F
1517     o Change of variable names useGMRedi, useKPP, useECCO
1518     o Further changes in dynamics.F, impldiff.F for TAMC
1519     o Tested for experiments 0, 2, 4.
1520       - not yet tested for GMRedi.
1521       - not yet tested for KPP.
1522    
1523    checkpoint30
1524     o Updates for OBCs
1525     o New experiment for test OBCs (internal_wave)
1526     o New output.txt in verification/exp4/results/
1527     o Updates for KPP: calculation of viscosity corrected, new variables
1528       kpp_dumpFreq and kpp_taveFreq
1529     o CPP'd calls to system routines for TARGET_CRAY_VECTOR (P.H.)
1530       and entry for T90 in genmake
1531    
1532    checkpoint29
1533     o packaged KPP and GM/Redi
1534    
1535    checkpoint28
1536     o Corrected initialization of hFacMin for difference vertical coordinates
1537     o Modified calculation of partial cell thickness to more robust algorithm
1538     o config_summary.F: replaced write_1D_... by write_0D_...
1539       read_write.F: added subroutines write_0D_...
1540     o routines calc_common_factors, calc_gs, calc_gt, calc_phi_hyd, find_rho:
1541       included some initialisations required for TAMC.
1542     o routine calc_isoslopes: modified sqrt computation to make it
1543       differentiable for zero argument.
1544     o routines dynamics, impldiff:
1545       included store directives and tape key computations required for TAMC.
1546     o ALL TAMC related changes are between ifdef ALLOW_AUTODIFF_TAMC
1547    
1548    checkpoint27
1549     o fixed calc_isoslopes() to so that cancellation of terms in tensor
1550       formulation works properly with variable resolution.
1551     o restructured the calling tree between the_model_main() and dynamics()
1552     o split initialise() into initialise_fixed() and initialise_varia()
1553     o introduced initialization file pSurfInitFile for free surface (cg2d_x)
1554       in new routine ini_psurf()
1555    
1556    checkpoint26
1557     o moved some #ifdef in optional routines to encompass everything
1558       except the argument declarations. This was using up some memory.
1559     o fixed macros like _ADT to work with both versions of Linux cpp
1560     o cleaned up some unused and uninitialized variables
1561       (helps when debugging with strict compile options)
1562     o split up CPP_EEOPTIONS.h into options and macros
1563       (macros are now in eesupp/inc/CPP_EEMACROS.h)
1564     o patch for 2 processor JAM mode
1565    
1566    checkpoint25
1567     o updates for OBCs and NH
1568     o dramatically reduced memory usage
1569     o added "JAM" routines for use on Artic network
1570     o parameterization of convection by implicit vertical diffusion
1571     o added a diagnostic of convective index
1572     o moved call to calc_divg_hat() from dynamics() to solve_for_pressure()
1573       (this is was partly for OBCs and NH but also in anticipation of
1574        an explicit free-surface option)
1575     o initial state input files for U and V
1576    
1577    checkpoint24
1578     o Removed some spurious "REAL"s
1579     o Updated KPP to latest version from JPL
1580     o Added a COS(latitude) in horizontal viscosity
1581    
1582    checkpoint23
1583     o Added del^4 diffusion for salt and temperature
1584     o Multiple minor fixes (implicit none's, arguments to global_sum, etc.)
1585    
1586    checkpoint22
1587     o Made many small changes: implicit none, format(i5), etc...
1588     o Introduced KPP mixing scheme (compiles and runs but *not* tested)
1589    
1590    checkpoint21
1591     o Introduced new I/O package that supports direct-access records (mdsio.F)
1592     o Split-up mid-level I/O routines
1593     o Updated input data for experiments 0,1,2,4 and 5
1594     o Finally removed the genmake.* scripts (everyone seems happy with genmake)
1595    
1596    checkpoint20
1597     o Tidied up open-boundaries some more
1598     o Added non-hydrostatic code
1599     o Fixed some input data
1600     o Modified MPI start-up to work in "coupled" context.
1601    
1602    checkpoint19
1603     o Tidied up directory structure for verification experiments.
1604     o Added new code for open boundaries.
1605     o Corrected advective terms near boundaries.
1606     o Added CPP flag for "old UV" geometry and corrected spherical geometry.
1607     o Implemented free-slip/no-slip BCs and del^4 dissipation.
1608     o Split default parameters out of ini_parms.F into set_defaults.F.
1609    
1610    checkpoint18
1611     o Further changes for optional code generation with
1612       CPP - ugh!
1613    
1614    checkpoint17
1615     o Beginning to incorporating modularity
1616       for supporting atmos. and ocean configs.
1617     o Small changes for TAMC complinace
1618     o New ultra simple test case. Barotropic box
1619       configuration "exp0".
1620    
1621    checkpoint16
1622     o Minor changes to exchange routines to support
1623       accumulation in reverse mode. Adjoint of an
1624       assignment is an addition.
1625     o Changes to support compilation by TAMC (LR(1)
1626       syntax) and by g77 under Linux ( 72 character
1627       limit ).
1628    
1629    checkpoint15
1630     Rewrote exchange routines to allow
1631     o General tile <-> tile connectivity.
1632     o TAMC reverse mode flag ( is this really needed? )
1633     o Variable width overlap and exchange region widths.
1634     o Hooks for sharing data via DMA, Arctic, Memory Channel,
1635       shmput/shmget, VIA, SYSV shmem and every other cool
1636       communication method.
1637    
1638  checkpoint14  checkpoint14
1639   Consistent isomorphism chages made. These allow dynamical core   Consistent isomorphism chages made. These allow dynamical core
1640   to support both pressure and meters as a vertical coordinate.   to support both pressure and meters as a vertical coordinate.

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