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revision 1.155 by mlosch, Wed May 14 09:22:09 2003 UTC revision 1.290 by heimbach, Tue May 11 20:59:19 2004 UTC
# Line 2  $Header$ Line 2  $Header$
2    
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    
14    checkpoint53
15    o stable checkpoint with up to date adjoint
16      TLM tests only run for 1st grdchk at the moment. Its unclear if
17      this is a code problem or a problem with resetting code for g_
18      variables that is being autogenerated wrong.
19      Otherwise:
20       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
21       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
22         are both still in chaos following their security messes.
23    
24    checkpoint52n_post
25    o various build (mostly genmake2) changes including:
26      - ability to build/run more easily within Cygwin and MacOS X
27      - more complicated Makefiles with a stronger dependence on Gnu Make
28    o pkg/seaice modifications
29      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
30        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
31        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
32      - changed proxy for geostrophic velocity and updated
33        verification/lab_sea/results/* accordingly
34      - removed ADI dynamic solver from pkg/seaice
35      - replaced all occurrences of 1/CSTICE or 1/CSUICE
36        they caused a segmentation fault under certain circumstances
37      - removed unused field WATR
38    o bug fix in exf-package:
39      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
40         now reflect that.
41    o small fixes in the cal-package:
42      - set reference date to first of January for the 'model'-calendar
43      - failing of cal_CheckDate in cal_FullDate now actually results in a
44        warning
45    o small modifications in exf-package to increase flexibility:
46      - change climtempfreeze from a constant to a runtime parameter that
47        is specified in data.exf_clim (default = -1.9)
48      - introduce runtime parameter windstressmax (default = 2.0) that is
49        specified in data.exf
50    o fix in pkg/thsice:
51      - update Evap (Tsf changes) to be consistent with Latent heat flux
52      - maintain snow precipitation unchanged (even if Tsf >=0).
53     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
54    
55    checkpoint52m_post
56    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
57      this does not change any of the results, because myIter=0 in swfrac always
58      lead to jwtype=2 (the default anyway), but the call makes little sense
59      as a default
60    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
61    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
62      atmospheric model (AIM) to use it ; add a "slab ocean" component.
63    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
64    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
65    o extending useSingleCpuIO option to work with new exch2 I/O format
66      - old-style, missing-tile I/O is still accessible by defining CPP
67        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
68    o monitor package can write to NetCDF files and/or STDOUT
69    o fix re-definition bug in MNC_GRID_INIT_ALL()
70    o doc/api_reference added
71      - a framework for building an API Reference Manual using all
72        the "protex" comments embedded in the code
73      - see pkg/generic_advdiff, pkg/mnc for examples
74    o MNC:
75      - make myThid the last argument for all subroutines
76      - new default for the grid files: NO halos
77      - add useMNC and other run-time flags
78      - separate per-file-group handling of the unlimited dimension
79      - early initialization of MNC w/ flags read at the eeboot stage
80        and lookup tables set in initialize_fixed
81      - write all MNC output to a freshly-created directory
82    o thermodynamics sea-ice (thsice) is now tested with testreport.
83    o test exp. advect_cs: use the standard cs32 grid ; update output.
84    o Added functionality to grdchk:
85      pick global i,j,k position (or nearest wet) where to perform check.
86    
87    checkpoint52l_post
88    o new land formulation:
89      a) use ground enthalpy as prognostic variable to ensure exact
90         energy conservation.
91      b) account for water temperature and for latent heat of freezing
92         in all processes (rain, run-off, ground storage)
93      c) compute surface and ground temperature implicitly.
94    o aim_v23 modification for new land model:
95      a) Treat separately land / ocean / sea-ice surface fluxes
96         to allow implicit computation of land & sea-ice surface temp.
97      b) add snow precipitation.
98    checkpoint52l_pre
99    
100    o fix problem (when 1 tile is empty) in min/max monitor.
101    o fix bug in timeAve (u,vZetatave in common block)
102    o no restoring terms under ice for pkg/seaice
103    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
104    o bug fix for pkg/seaice pickups
105    o change MNC call locations and add coordinate attributes
106    o mask vorticity at the corner ; affects global_ocean.cs output
107    o fix ini_curvilinear_grid ; test CS experiments with mpi
108    o aim.5l_cs: modify sea-ice fraction input file ; update output
109    o exf: Adding simple range check routine for exf fields after read
110    
111    checkpoint52k_post
112    o removed top-level directory "diags"
113      - we migrated these functions to pkg/timeave a long time ago
114    o fixed bug introduced in pkg/monitor
115    o accuracy ctrlprec = 32 insuffient for gradient checks using
116      averaged fields (I/O via cost_averages)
117      -> use ctrl.h in active_file*.F to control I/O precision.
118    o paramter list of CALL ADTHE_MAIN_LOOP
119    o added initial do_the_model_io to ecco
120    o set all ...Freq to zero after cost_final
121      taveFreq, dumpFreq, pChkptFreq
122    o MAIN and ECCO differentiability restored
123    
124    checkpoint52j_post
125    o fix nchklev in tamc.h for global_ocean...
126    o Bringing flow and store directives up-to-date
127    o Really weird thing!
128      call do_the_model_io from the_main_loop with parameters
129      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
130      TAF places a faulty re-call of initialise_varia
131      after cost_final call which should not be there!
132    checkpoint52j_pre
133    
134    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
135      error messages
136    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
137    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
138      debug output
139    o modfied mdsio_writefield.F to handle non-global files under exch2
140    o update AIM Cubed-Sphere exp (aim.5l_cs):
141      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
142    o update AIM Equatorial Channel exp:
143      use standard aim_v23 pkg and change the SST fields to be more realistic.
144    o globalFile now works with exch2
145    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
146      mon_vort3.F to make exch2 friendly with >1 tile per cube face
147    o limit timeave output for hi-res integrations
148    
149    checkpoint52i_post
150    o removed CPP_EEOPTIONS.h from verification/*/code
151    o updated the tiling for global_ocean_pressure
152    checkpoint52i_pre
153    
154    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
155      the old pkg/aim).
156    
157    checkpoint52h_pre
158    o shortened offending lines in exch2_send_rx?.template
159    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
160    o genmake2: add build & execute test for NetCDF code
161    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
162      old grid files, moved CPP_EEMACROS.h to pkg/exch2
163    o added useSingleCPUIO flag to monitor.F and mon_out.F
164    o added temporary hack for sea-ice dynamics on the cube:
165      metric terms are ignored and it is assumed that
166      there is no sea-ice on cube faces 1, 2, 4, and 5.
167    
168    checkpoint52f_post
169    o added exch2 cube routines to pkg/exch2
170    o modified hs94.cs-32x32x5 to use it
171    o added new grid files to hs94.cs-32x32x5
172    checkpoint52f_pre
173    
174    checkpoint52e_post
175    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
176      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
177    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
178      to work with implicit vertical advection and AB ;
179    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
180    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
181     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
182    checkpoint52e_pre
183    
184    o fix bug in impldiff when Nr=1 or Nr=2.
185    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
186    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
187    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
188      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
189    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
190    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
191    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
192    
193    checkpoint52d_post
194    o re-tiled many expts to allow comparison in multi-processor mode
195      - updated output accordingly
196      - changed hs94.128x64x5 to use intial T from file rather than use the
197        random number generator
198    o add infrastructure in model routines for fizhi and gridalt packages
199    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
200    o changes to permit hi-res, cubed-sphere, configuration
201      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
202      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
203      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
204        of surface winds for the cube
205      (A verification experiment, based on global_ocean.cs32x15, but with
206       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
207       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
208       complete with example surface forcing files and matlab scripts to look
209       at the output and compare it with that of global_ocean.cs32x15.)
210    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
211       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
212       to conform to the common rule.
213    o check-in the first version of the coupler + interfaces for multi-components
214       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
215       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
216       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
217       - ocean and atmos. share the same horizontal grid (no interpolation).
218       - exchanges between component and coupler is done in forward_step
219    o new verification experiment, cpl_aim+ocn:
220       coupled ocean - AIM atmosphere on cs32 grid.
221    
222    checkpoint52d_pre
223    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
224    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
225    
226    checkpoint52c_post
227    o Fixing OPTIONS files for use of exf:
228      - ALLOW_ECCO not needed
229      - ECCO_CPPOPTIONS.h should not be included from
230        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
231        as has been the case in the past
232      - All cal/exf related options are currently set in
233        single header file. Should remain so until we
234        agree on a consistent new policy.
235    o Removed all CPP options for cal package.
236      cal has no more CPP options.
237    o modified STOREs in GAD_ADVECTION
238    o corrected key comp. for passkey
239    
240    checkpoint52b_post
241    o new version: "thsice" of thermodynamic sea-ice pkg:
242     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
243     - modify fluxes but do not change theta directly;
244     - light cleaning of bulk_force pkg (still needed with thsice).
245     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
246       + output_thsice.txt to test thsice & bulk_force pkgs.
247    o put back grid & coriolis monitor output.
248    checkpoint52b_pre
249    
250    o call "do_the_model_io" at the beginning (=> dump initial state)
251    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
252    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
253      (need info on NUMBER_OF_PTRACERS)
254    o missing PTRACERS headers in some routines
255    o default tamc.h in pkg/autodiff supposed to crash
256      to ensure proper customization
257    
258    checkpoint52a_post
259    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
260      - moved surfaceTendencyTice from pkg/seaice to main code
261      - subroutine FREEZE_SURFACE now limits only surface temperature
262        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
263        => new output.txt for global_ocean.cs32x15 & global_with_exf
264      - keep the old version of FREEZE for backward compatibility;
265        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
266      - corresponding modifs for TAF directives
267    o added surface flux output variables to TIMEAVE_STATVARS
268    o time-averaged output for pkg/ptracers
269    o fix problem with ECCO-related divided adjoint
270      snapshot file was missing some ad-variables,
271      but no warning issued by TAF
272    
273    checkpoint52a_pre
274    o some bug fixes for #undef REAL4_IS_SLOW
275    
276    checkpoint52 = ecco_c52_e35
277    o after testing adjoints of checkpoint51u_post
278    
279    checkpoint51u_post
280    o this is the post-merge tag of the ecco-branch
281      (needs another clean checkout and re-testing)
282    o various natl_box_adjoint configs and results
283      but no input fields
284    o obcs adjoint not yet merged!
285    o adding ECCO global 1x1 and 2x2 degree configs
286    o updated/extended some store directives for seaice
287    o pkg/ecco now containes ecco-specific part of cost function
288    o top level routines the_main_loop, forward_step
289      supersede those in model/src/
290      previous input data.cost now in data.ecco
291      (new namelist ecco_cost_nml)
292    o in ctrl/ cleaned some cross-dependencies and updated CPP options
293    
294    checkpoint51t_post
295    o this is the pre-merge tag of the ecco-branch
296    
297    checkpoint51s_post
298    o cleanup: removed various obsolete #define-s
299    o pkg/grdchk
300      - renamed 'ph-grd 3' to 'grad-res'
301      - merged from ecco-branch
302        (remaining bug fixes for obcs gradient checks)
303      - additional high-precision output for testreport
304        (grep for 'precision_grdchk_result')
305    
306    checkpoint51r_post
307    o cleaned up or removed CPP_OPTIONS.h files
308    o updated results for some of the tests to reflect the new
309      optfiles (-ieee: -O0 instead of -O3)
310    
311    checkpoint51q_post
312    o cd_code:
313      - moved cd_scheme.F -> cd_code_scheme.F
314      - separate read_checkpoint from cd_code_ini_vars.F
315      - separated cd_code part from write_checkpoint
316      - updated AD_SOURCE, generated .flow
317      - added CD_CODE_VARS.h to the_main_loop
318      - Moving cd_code specific store dir.s to pkg/cd_code
319    o ctrl package totally restructured
320      - pack/unpack now optional and decoupled from
321        xx_/adxx_ I/O
322      - ctrl_pack/unpack cleaned
323        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
324      - confined inclusion of AD_CONFIG.h to where necessary.
325    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
326    
327    checkpoint51p_post
328    o create initial cd_code package
329      - WARNING: the initialization of fields within packages
330        is broken because INI_FIELDS (where READ_CHECKPOINT is
331        called) is called *before* PACKAGES_INIT_VARIABLES.
332        This seems to be backwards since
333        1) its important to initially zero the entire field including
334           the "halo" region
335        2) zeroing needs to be done *before* reading pickup info
336           and the pickup call might or might not happen in any
337           particular run
338      - this needs an overhaul for R2
339    o cleanup verification/*/code/GMREDI_OPTIONS.h
340    o cleanup testreport
341    
342    checkpoint51o_post
343    o bringing AD-related verif's up to date with genmake2
344      - carbon/
345      - global_ocean.90x40x15/
346      - hs.94.1x64x5/
347      - (front_relax/ )
348    o (more) consistent directory structure for AD-related verif.'s
349    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
350    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
351    o bug fix in find_alpha.F for MDJWF:
352      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
353        change rho -> rho-rhoConst
354      - replace call find_rho to find_rhonum
355    o initialisation of rFlx extended to full array (required by TAF)
356      and shifted to thermodynamics
357    o removed PTRACERS.h in ptracers routine
358    o added surfacetendencyPtr to S/R parameter list pracers_forcing
359    o Correcting initialisations for fVerU, fVerV.
360    o helping TAF to recognize dependency on kUp for
361      fVerU, fVerV
362    o Replacing delZ by delR in pkg/ctrl/
363    checkpoint51o_pre
364    
365    o undid all of cp51 pending some cleanups and discussion
366    o added the [#include "AD_CONFIG.h"] statement to all files that need
367       it for adjoint/tl #defines
368     o re-worked the build logic in genmake2 to support AD_CONFIG.h
369     o removed tools/genmake since it no longer works
370    
371    checkpoint51n_post
372    o modifications to make FREEZE flux visible to pkg/kpp
373      - moved surfaceTendencyTice from pkg/seaice to main code
374      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
375      - subroutine FREEZE now limits only surface temperature
376        (this means new output.txt for global_ocean.90x40x15,
377         global_ocean.cs32x15, and global_with_exf)
378    o added surface flux output variables to TIMEAVE_STATVARS
379    
380    checkpoint51n_pre
381    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
382    o added [#include "AD_CONFIG.h"] to all files that use the following
383      defines:
384      - ALLOW_ADJOINT_RUN
385      - ALLOW_TANGENTLINEAR_RUN
386      - ALLOW_ECCO_OPTIMIZATION
387    
388    checkpoint51m_post
389    o incorporating changes to get TAMC/TAF working in genmake2
390      - added new TAMC/TAF targets to the Makefile
391      - various cleanups related to package handling
392      - these changes should have no impact on the forward model
393    
394    checkpoint51l_post
395    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
396     - faster algorithm for cal_addtime.F
397     - higher precision arithmetic, where needed
398     - pkg/exf *startdate variables changed from calendar date to
399       model integration time
400    
401    checkpoint51l_pre
402    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
403    o enable to apply restoring on S & T only in a latitude band.
404    o update output (external_forcing_surf modif. change truncation errors)
405       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
406    
407    checkpoint51k_post
408    o change default to: useNHMTerms=.FALSE.
409     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
410       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
411     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
412        exp1, ideal_2D_oce
413     - change data file of oceanic exp (leave the results unchanged for now)
414       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
415    o set gravitySign automatically according to the vertical coordinate used
416      (and change sign: back to "logical" value: +1 when R increases downward)
417    o added an include barrier to the default CPP_OPTIONS.h and
418      removed the #include "PACKAGES_CONFIG.h" from it
419    o fix a bug in mom_fluxform (from chk51j_post)
420    
421    checkpoint51j_post
422    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
423    o adjusted some flow directives (dynamics, thermodynamics)
424    o added cubed-sphere case to test cost function
425    o heckpoint_lev?_directives.h now include
426      pkg-specific directives, whenever those are enabled.
427    o Moving pkg-specific flow directives to corresponding pkg
428      Moving pkg-specific differentiation list to corresponding pkg
429      Moving pkg-specific checkpoint-lev storing to corresponding pkg
430      ---> conventions are
431           - pkg_ad.flow
432           - pkg_ad_diff.list
433           - pkg_ad_check_lev?_dir.h
434    
435    checkpoint51i_post
436    o merge of the branch-genmake2
437      - knowingly breaks the older genmake
438      - automatic generation of all ALLOW_${PKG_NAME} defines
439      - new testreport supersedes older testscript
440    o large number of package inclusion and header cleanups
441    checkpoint51i_pre
442    
443    o new output for adjoin of global ocean vector invariant
444    o fix for checkpoint of thermodynamic seaice and bulk_force
445    o Steph gchem various cleanups
446    
447    checkpoint 51h_pre
448    o fixed some single quotes
449    o modify gchem pkg to be more versatile
450    o modifications to clean up dic pkg
451    o add pkg/cfc
452    
453    checkpoint51g_post
454    o provide links for ARPACK and ADM*TLM
455    o start removing verification/vero/
456    o update AD-related stuff
457      (in particular some IF-statements in model/src/ routines)
458    o adding to verification/global_ocean.90x40x15/ adjoint of
459      vector invariant setup
460    
461    checkpoint51f_post
462    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
463    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
464      of tracer Green's fucntions for ocean inversion project.
465    
466    checkpoint51f_pre
467    o Added on-the-fly spatial interpolation capability
468        "USE_EXF_INTERPOLATION" to pkg/exf.
469      - This is a temporary Cartesian-grid hack until
470        the super-duper ESMF coupler becomes available.
471      - See verification/global_with_exf/README for usage example.
472      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
473        flags and modified pkg/seaice accordingly.
474    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
475        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
476        non-local transport term.
477    
478    checkpoint51e_post
479    o pkg/mom_vecinv:
480      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
481      - add time-ave diagnostic of vorticity advection.
482    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
483    o atmospheric geopotential: - include water vapor effect;
484                                - use p^kappa in p* scaling.
485    o land pkg: read initial state from files.
486    o AIM : add stratospheric drag in the upper level
487    
488    checkpoint51d_post
489    o change function ILNBLNK (=> last non-blank char.) to return zero
490      (instead of the string length) when the string. char is empty
491    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
492    o modif's to restore TAMC compatibility
493      - avoid "_d" constructs in PARAMETER declarations
494      - avoid interrupting lines by comment lines
495    o Use cluster local disks for purely local I/O
496      vs. globally visible disks needed for ctrl stuff
497      (merged from ecco-branch)
498      - new active_file_loc... and mdsio_..._loc routines
499      - affected packages: autodiff, ctrl, grdchk, mdsio
500    
501    checkpoint51c_post
502    o introducing integer flag debugLevel
503      - debLevZero: suppress all output
504      - debLevA: standard
505      - debLevB: equivalent to current debugMode=.TRUE.
506    o introducing pathname variable mdsioLocalDir for mdsio
507      that can be specified at runtime
508      (relevant for cluster I/O to local disk)
509    `
510    >>>checkpoint51b_post
511    adjoint of ptracers
512    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
513    o extended state in checkpoint_lev?, etc.
514    o alternative ctrl/cost with tr1 or ptracer
515    o new comlev1_bibj_ptracers
516    o new ptracers.flow
517    o made ptracers_forcing same as external_forcing_s
518    o added verification for adjoint with ptracers
519      - adm. grdchk fail so far
520      - tlm. grdchk OK
521      - checked tapelev/comlev recomputations: OK
522    <<<checkpoint51b_pre
523    
524    checkpoint51a_post
525    o added code for biogeochemistry package
526      - new pkgs: dic, gchem
527      - new subroutine in ptracers
528    o modify code for biogeo packages
529      - in model/src and pkg/ptracers
530    
531    checkpoint51
532    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
533      - autodiff, ctrl, exf, grdchk, seaice
534      kept separate packages
535      - cost, ecco, obcs
536    o updating verification/internal_wave, verification/lab_sea
537      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
538    
539    checkpoint50i_post
540    o Preparing next differentiable checkpoint and sync
541      of MAIN vs. ecco-branch
542      - 1st step: this one is differentiable
543      - 2nd step: next(! not this) checkpoint will have updated packages
544                  from ecco-branch)
545    
546    checkpoint50h_post
547    o new package "land": provide surface BC for AIM.
548    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
549    o AIM: use true log-P extrapolation for near surface temp (= as in
550        F.Molteni paper) ; update aim.5l_cs output.
551    o New variable in PARM03 for more flexible pickups
552    o somewhat cleaned package initialisation sequence for
553      ctrl/ cost/ ecco/ in packages_... routines
554    
555    checkpoint50g_post
556    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
557      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
558      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
559        made the default because of faster convergence than ADI
560    
561    checkpoint50f_post
562    o exf totally restructured
563      - replaced all exf_set_ routines by one generic exf_set_gen.F
564        and made sure it's still differentiable
565      - split exf_getffields.F into new exf_bulkformulae.F
566      - exf_inscal_/exf_outscal_ suffixes consistent with field names
567      - updated adjoint/makefile and relevant verif. accordingly
568    
569    checkpoint50f_pre
570     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
571          + change Evap over land. (update aim.5l_cs output)
572     o added missing .cvsignores and made uniform across expts
573     o changed configuration of tidal_basin_2d expt
574     o added pkg/debug functions for tracing code in fatal crashes
575     o tidied pkg/monitor to use MONITOR_OPTIONS.h
576     o new fn in pkg/monitor to stop model if solution grows too big
577     o removed lots of single quotes from comments
578    
579  checkpoint50e_post  checkpoint50e_post
580  o make KPP work with PTRACERS  o make KPP work with PTRACERS
581   - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is   - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is

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