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revision 1.118 by adcroft, Mon Jan 13 14:31:49 2003 UTC revision 1.499 by jmc, Sun Jun 19 22:22:41 2005 UTC
# Line 1  Line 1 
1  $Header$  $Header$
2    $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6  o gmredi: fix few bugs and restore parameter values (e.g., Small_Number=1.D-12)  
7    and scheme (e.g., Large_SlopeSqr=1.D+48) of checkpoint47f_post  o fix few little things to avoid floating error with -ftrapuv (ifort v9)
8     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
9    
10    checkpoint57i_post
11    o Diagnostics package was changed: diagnostic allocation is now deactivated
12      by setting an empty file name in the namelist (used to be by setting 0 frequency)
13    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
14      add 1rst Order upwind vertical Shear.
15    o add a quick fix for A/B checkpointing in OFFLINE mode
16    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
17      end-run around the C/Fortran linking horror in eesup/src/timers.F
18    o added pkg/runclock: allows user to terminate run based on wall clock
19    o added non-hydrostatic scaling parameter: nh_am2
20    o pkg/my82: futile attempt to make results compiler-independent by adding
21      some "_d 0", etc. no effect.
22    o for mnc output, fill the 'T' coordinate var with myTime and create a
23      separate 'iter' variable for iteration count
24    o pkg/diagnostics:
25      add new capability: output of Global/Regional & per-level statistics ;
26      tested against monitor output (including land & thSIce) on various exp.
27    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
28    
29    checkpoint57h_done
30      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
31      data.diagnostics, data.gchem, data.ptracers) is done.
32    
33    o pkg/diagnostics: prepare for Global/Regional statistics.
34      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
35    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
36      and rename it: DIFFERENT_MULTIPLE
37    
38    checkpoint57h_post
39    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
40    o pkg/diagnostics: change output frequency, now in seconds (instead
41      of Nb of iterations). This requires to change data.diagnostics.
42    checkpoint57h_pre
43    
44    o in mnc, let the user create the output dir if both mnc_outdir_date
45      and mnc_outdir_num are false
46    o add fflags() to pkg/diagnostics which allows one to specify, on a
47      per-file basis, the file precision [default behavior is unchanged]
48    o added diagnostics to pkg/kpp, including computation of mixed layer
49      depth based on a temperature/density criterion
50    o updated verification/natl_box to test the new pkg/kpp diagnostics
51    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
52    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
53    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
54      not mnc -- this mistake was found by JMC and is now corrected
55    
56    checkpoint57g_post
57    o add Adams-Bashforth 3rd Order time stepping:
58      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
59      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
60    checkpoint57g_pre
61    
62    o make lambda[Theta,Salt]ClimRelax spatially varying
63      (default remains spatially uniform constant based on tau)
64    o added new control variables
65      * init. uVel, vVel, etanN
66      * lambda[Theta,Salt]ClimRelax
67    o separate masks used for ctrl_pack/unpack 'from write_grid' output
68      (suggested by G. Forget)
69    
70    checkpoint57f_post
71    o add parameter "baseTime" = model base time = time at iteration zero
72      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
73      account for baseTime shift
74    o move Coriolis arrays from PARAMS.h to GRID.h
75    checkpoint57f_pre
76    
77    o mnc-ifying the seaice package
78    o introduced an alternative length scale calculation for use in the limiting
79      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
80    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
81    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
82      as well as grad(vort3).  Made it compatible with both approximate form
83      for the cubed sphere and full form of these gradients.  Added flag
84      useFullLeith to select between approximate and full form.  
85    o add "d0" in getcon.F to reduce differences between compilers/platforms
86      update output.txt of exp. fizhi-gridalt-hs
87    o change port_rand funtion to allow to set the seed.
88    o fix obscure MNC bug involving conversion between reals and integers
89      - it caused no problems with certain (eg. gcc, ifc) compilers but the
90        new version is now more standards-compliant
91    o adjoint-related modifications
92      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
93      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
94      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
95    
96    checkpoint57e_post
97    o Adding eddy stress controls a la Ferreira et al.
98    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
99    
100    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
101      update output.txt of exp. fizhi-gridalt-hs
102    o add more "Z" dimensions and associated coordinate vars to MNC
103    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
104    o parameter calendarDumps: when set, approximate months (30-31 days) and years
105      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
106      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
107      months and years.  Requires pkg/cal.
108    o diagnostics: add pickup functionality
109      - off by default for backwards compatibility
110      - current version only uses MDSIO -- MNC will be added
111    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
112    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
113    
114    checkpoint57d_post
115    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
116    o modify verification/ideal_2D_oce so that it tests the creation of mnc
117      output from the diagnostics package
118    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
119    o make genmake2 more portable by using ".$FS" instead of ".f" for more
120      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
121    o add coordinate variables to the MNC output from the diagnostics package
122    o change MNC-flags default value: true when useMNC=TRUE
123    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
124      the ability (off by default) to read the grid information using MNC
125    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
126    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
127    o do snap-shot diagnostics at the middle of the time-interval (instead of
128      at the end).
129    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
130      new test for AIM with thSIce + slab-ocean
131    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
132    o move state variable diagnostics to the beginning of the time step ;
133      (note: still needs some work specially for snap-shot diagnostics)
134      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
135    
136    checkpoint57c_post
137    o Change testing option (-ieee) to get closer agreement between g77 & ifort
138    o generate new output.txt files on faulks with g77 & the new -ieee option
139    checkpoint57c_pre
140    
141    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
142      update output.txt of exp. global_ocean.90x40x15
143    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
144      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
145    o add saltFlux(+File) forcing capability with periodicExternalForcing
146    o allow to use pkg diagnostics for GM-Redi & ThSIce output
147    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
148    o improvements for the MNC output from DIAGNOSTICS:
149      - correct handling of the unlimitied dimension
150      - all dims now have associated coordinate variables
151      - variables located at U, V, and Corner ("Z") points are now written
152        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
153        *all* data points are output
154    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
155    o added pkg/seaice/seaice_monitor.F
156    o mdsio_readfield.F can now read files visible only to master MPI process.
157    o pkg/seaice: some test code for ice-modified ocean stress
158    o exf_getffields interpolation defaults to bilinear for all scalar forcing
159      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
160      spurious negative numbers for precipitation and humidity.  Will cause
161      some small numerical differences for integrations using pkg/exf/exf_interp.F.
162    o pkg/ctrl/
163      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
164        May be enabled via doPackDiag
165      *  introduce z-scaling of
166         + gradient (doZscalePack) and
167         + control (doZscaleUnpack)
168    o pkg/mdsio/
169      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
170      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
171    
172    checkpoint57b_post
173    o simplify options in diagnostics_fill arguments (remove weird combinations)
174    o fix MNC coordinate variables so that they now contain per-face index
175      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
176      general, EXCH2 grids are only aligned to a "local" coordinate system
177    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
178    o Implement instantaneous output within pkg diagnostics:
179      setting a negative frequency in data.diagnostics produces
180     "snap-shot" output (as opposed to time-average if freq > 0)
181    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
182      NOTE: change ptracer diagnostics name: use 2 characters to work with
183            more than 9 tracers. Add also diagnostics of advect & diffus flux.
184    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
185      becomes the coordinate variable for the 'T' dimension
186    o add CF-style coordinate variables to MNC
187      - just a first cut:  numbers are meaningless on the cubesphere and
188        missing along the T axis but otherwise it works!
189    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
190    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
191    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
192      this is based directly on what the model compute, so that the content of
193      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
194    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
195    o clean up build options files for SunOS, in particular
196      - remove -traditional from xmakedepend
197      - change -xarch=v9 to -xarch=native for f77
198      - restore use of make (not gmake)
199      - add CC=gcc if using g77
200    o changes per discussion of AM, JMC, & EH3 today:
201      - move redundant "grid" variables out of "state" -- in preparation of
202        creating proper CF-style coordinate variables and in recognition
203        that any/all grid variables can be easily copied (eg. w/NCO) from
204        the grid files into any of the other NetCDF files
205      - *always* output grid variables with MDSIO (this will eventually be
206        changed)
207      - output MNC grid file if useMNC is true
208    o every instance of _END_MASTER() has been found and replaced with
209      _END_MASTER( myThid ) in order to satisfy certain picky Sun
210      preprocessors
211    o re-arrange diagnostics pkg initialisation:
212     - allow each package to extend the available diagnostics list
213     - add some checking and fix small problems (multi-threaded, ...)
214     - new S/R diagnostics_fill (replace fill_diagnostics):
215       look through the short list of active diag. (instead of the long list)
216       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
217    
218    checkpoint57a_post
219    o this set of changes restores TAMC compatibility
220      tested for global_ocean.90x40x15 adjoint on trough
221      (what a pain)
222    
223    checkpoint57a_pre
224    o some modifs in tools/build_options for sunos
225    o call ctrl_pack for ctrl at end for optimcycle=0
226    
227    checkpoint57
228    o add horizontal bi-harmonic viscosity for vertical velocity
229      - new parameter viscA4W (defaults to viscA4)
230      - affects only non-hydrostatic code
231      - to be done: no-slip lateral boundary conditions
232    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
233    o implement Implicit Vertical advection for pTracers
234    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
235      (implemented also for implicit vertical diffusion & advection)
236    o OBCS: extend application of tracer open boundary conditions
237      to a strip beyond the boundary of width Olx/Oly
238    o add call monitor to TAF set of required calls (flow directives)
239      and include in natl_box_adjoint
240    o untangle a few ifdefs related to cost, ctrl, autodiff
241      untangel a few ALLOW_ECCO_OPTIMIZATION
242    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
243      (theta2, salt2 in ecco_cost_weights)
244    
245    checkpoint56c_post
246    o OBCS as control variables
247      - update ctrl_ad_diff.list, obcs_ad_diff.list
248      - remove balance of obcs controls from default
249      - fix index bug nobcs in ctrl_init
250      - fix dummy fields filen in ctrl_pack
251      - add dummy weights for obcs
252    o lsopt: comment out fort.94 output
253    o optim:
254      - remove unnecessary header files
255      - adjusted namelists
256      - add xerbla.F to Makefile
257    o exf:
258      - multiple modifications of exf_check_range
259      - unit change in exf_init_runoff from [m/year] to [m/s]
260    o mdsio:
261      - i/o-vector change debugLevel from debLevA to debLevB
262    
263    checkpoint56b_post
264    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
265      is called from DO_THE_MODEL_IO
266      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
267      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
268      - clean up PTRACERS_WRITE_TIMEAVE a little
269    o add another verification experiment that tests both the cfc-pkg and
270      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
271      reactive tendencies treated inline with regular timestepping
272    o testreport previously did a lousy job of comparing small numbers, so
273      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
274      implemented in the little c-progam tmp_cmpnum.c which is embedded in
275      testreport.
276    o ptracers_monitor: bug fix for MPI
277    
278    checkpoint56a_post
279    o GCHEM: finish reorganizating the package
280      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
281        (introduces another 3D-array for each passive tracer, but only if
282        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
283        gchemTendency is not needed because the timestep is done separately)
284      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
285      - GCHEM is now---more or less cleanly---separate from PTRACERS
286      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
287        so clear to me how that should be done in a general way.
288    o CFC: improve formatting of output in CFC_ATMOS
289    o PTRACERS:
290      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
291        that ALL experiments with ptracers enable can be checked. This makes
292        GCHEM_MONITOR obsolete.
293      - include a runtime parameter PTRACERS_monitorFreq that defaults to
294        monitorFreq
295      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
296    o add PTRACERS (PTR0[1-5]) to testreport output
297    o exf_check_range:
298      * default changed to .TRUE.
299      * will check values for niter0 if debLevA, every timestep if debLevB
300      * STOP in exf_check_range if 'out of range'
301      * range chosen generous to allow for potential extema
302      TBD: a version with stricter range
303           permitted range would be runtime parameters
304    o GMredi:
305      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
306      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
307      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
308    o GCHEM:
309      - move call to GCHEM_FORCING_SEP, so that it is now called before
310        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
311      - introduced a useGCHEM runtime flag and applied it everywhere.
312      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
313        this flag is now only visible within GCHEM-pkg routines.
314      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
315        be replaced by a 3D array that is computed before thermodynamics; for
316        this, the tracer ID iTracer had to be included into the parameter list
317        of ptracers_forcing
318      - set up forward_step to call gchem_forcing, that will replace
319        gchem_forcing_int in ptracers_forcing
320      - cleaning up
321    o small cleaning of exch2: remove files that are also in eesupp/src
322    
323    checkpoint56
324    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
325    o mnc: cleanup "full" files--fixes out-of-memory problem
326    o ECCO-GODAE
327      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
328      * fully merged and updated from SIO code
329        windstress sign change affects
330        - exf_inscal_[u/v]stress
331        - sign of xx_tau[u/v] adjustments
332        - signs in cost_scat
333      * ctrl_get_gen: avoid update of tau[u/v] for first few days
334      * natl_box_adjoint updated and compressed
335      * 2-level checkpoint switch added
336        (tested in EXP. 1 of natl_box_adjoint)
337      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
338    o SVD
339      * first complete, non-hacked version for SVD calculations
340      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
341        performed via direct access files admtlm_vector.it????
342        (via ctrl_[un]pack)
343      * optimcycle is used for ARPACK iteration counter
344        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
345      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
346        and add linear transforms where necessary
347      * controls are initial/final SST, SSS (can be extended; need to check
348        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
349    o mdsio: filename info to both stderr, stdout
350    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
351      from sign change
352    
353    checkpoint55j_post
354    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
355      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
356    o add consistent build directories and .cvsignore files to verification
357    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
358    o make all subroutines 30 or less characters in length for certain older
359      compilers to work (a thorough search only turns up two routines in
360      pkg/ptracers)
361    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
362      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
363    
364    checkpoint55i_post
365    o change arrays for total vertical diffusivity (2.D if explicit,
366      3.D if implicit) ; each ptracer uses its own background value.
367    o added mnc/NetCDF output capability to ocn_compon_interf
368      - added bits to verification/cpl_aim+ocn so that it can run on
369        ITRDA and other clusters without the mpirun "-wd" option
370    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
371      configuration
372    o give MNC the ability to create additional files rather than
373      exceeding a specified file size limit "MNC_MAX_FILESIZE"
374      - the default is just less than 2GB which is a practical limit
375        on many systems
376    o Compute the non-local term using either KPP vertical diffusivity (=default)
377       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
378    
379    checkpoint55h_post
380    o add verification test "vermix"
381    o remove all the *_ioinc flags and replace with the single global
382      outputTypesInclusive flag
383    o allow to set a vertical profile of vertical diffusivity for T & S
384    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
385    o useMNC moved from data.mnc to data.pkg
386    
387    checkpoint55g_post
388    o Renaming carbon AD experiments to comply with testreport conventions
389    o Updating adjoint of Held-Suarez hs94.1x64x5
390    o Fixing directives for non-ECCO forward_step, after ECCO directives
391      have been fixed to avoid recomp. of do_oceanic_phys
392      Works well for global_ocean.90x40x15,
393      but recomp. issue remains for carbon
394    o Updating adjoint output for natl_box_adjoint after
395      pkg/ecco has been modified (see taga c55d_post)
396    
397    checkpoint55f_post
398    o rename to timeave_init_fixed
399    
400    checkpoint55e_post
401    o some delicate re-shuffle of store directives to avoid one
402      extra call of do_oceanic_physics
403      affects ecco_the_main_loop.F, do_oceanic_physics.F
404      checkpoint_lev1_directives.h
405    o NB: this may break global_ocean adjoint temporarily,
406      but it is clear how to fix it. Will do later, need this now.
407    
408    checkpoint55d_post
409    o ECCO specific cost function terms (up-to-date with 1x1 runs)
410    o ecco_cost_weights is modified to 1x1 runs
411    o modifs to allow observations to be read in as
412      single file or yearly files
413    o enable to read exf forcing fields as either
414      single file or yearly files (flag useExfYearlyFields)
415    checkpoint55d_pre
416    
417    o switch between 2-level and 3-level checkpointing
418    o add ability of MNC to write local and "partial" (eg. 2D slices where
419      the full 3D field is never actually stored) arrays to NetCDF files
420      with the correct (that is, the complete multi-dimensional) set of
421      array indicies
422      - used in mom_vecinv() to write the diagFreq output
423      - tested (demonstrated) in verification/aim.5l_cs
424    o further mnc-ification
425      - add verification/lab_sea to the list with mnc setups
426      - fix undefined mnc v-names in cd_code
427      - add kpp to mnc output (both snapshot and timeave)
428    o non-hydrostatic code
429      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
430        in calc_gw.F
431      - defaults to viscAh
432      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
433        friction or Leith) in non-hydrostatic mode, as long as there is
434        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
435    o pkg/cost
436      extend simple cost functions to treat time mean quantities
437      (T,U,V) via cost_accumulate_state from cost_tile
438    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
439        be 2 times larger than the minimum size the advection scheme requires.
440        now get a perfect conservation of salt in advect_cs test-exp (updated)
441    o GGL90 (Gaspar's TKE mixed layer)
442      - add horizontal diffusion of TKE, requires exchanges in
443        do_fields_blocking_exchanges, horizontal diffusivity is zero by
444        default. In OPA there is no horizontal diffusion of TKE but the
445        mixing coefficients are computed from a horizontal average of TKE of
446        6 points or so. I think that diffusion has a little more physical
447        justification.
448      - clean up ggl90_calc in the hope of reducing memory usage (this hope
449        was in vain)
450      - mask tke-variable in ggl90_init
451    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
452    o fix biharmonic diffusion on CS-grid.
453    o more obcs stuff
454      - added obcs_external_fields_load as an alternative to the EXF-pkg option
455        for reading boundary values. This routine is called from
456        obcs_prescribe_read
457      - updated obcs_check
458      - changed sponge layer relaxation parameter units for days to seconds
459      - turned off sponge layer by default
460      - changed argument list of OBCS_CALC to myTime+deltaTclock
461      - fixed about 35 bugs in obcs_external_fields_load
462    
463    checkpoint55c_post
464    o obcs stuff
465      - new runtime flags useOBCSprescribe, useOBCSbalance
466      - re-arranged obcs_calc
467      - moved exf_getobcs to obcs_prescibe_read
468        obcs_prescibe_read is called after ORLANSKI stuff
469        and independent of it (executable can contain all).
470      - updated obcs_check
471      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
472        These may be necessary only if tangential velocities are
473        prescribed at OB, not sure, needs testing.
474    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
475      which simplifies the calls and passes the ifc check-bounds test
476    
477    checkpoint55b_post
478    o add a 2D scalar, Z location, exchange_2 routine.
479    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
480      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
481      affects advect_cs results (for the wrong reason): update output.txt
482    o use a more standard discretization for biharmonic viscosity ;
483     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
484      affects results of dome set-up: update output.txt
485    o fix gad_advection.F (CubedSphere part), back to version 1.23
486    o fix bug in mom_vi_del2uv.F (CubedSphere part).
487    
488    checkpoint55a_post
489    o merged code to
490      * prescribe/read time-dependent open boundaries
491        (works in conjunction with exf, cal)
492      * sponge layer code for open boundaries
493      * each boundary N/S/E/W now has its own CPP option
494        (healthy for the adjoint)
495    
496    checkpoint55
497    o up-to-date adjoint of previous breaks
498      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
499      - global_ocean_ebm: adjoint still needs fix (TLM ok)
500      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
501      - carbon: * remove tr1-related adjoint verification
502                * add ptracer as control variable
503    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
504      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
505    
506    checkpoint54f_post
507    o in verification/carbin/ remove experiment related to
508      ALLOW_PASSIVE_TRACER (array tr1 etc)
509      code_ad/ input_ad/ results_ad
510    
511    o add two new packages
512      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
513        + subject to optimization (memory)
514      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
515        + subject to reordering (many GOTOs in the original code)
516        + so far opps is called for every (i,j) point, and then operates in
517          the vertical; one may want to reorder the scheme in order operate in
518          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
519          fields)
520    o overhaul of IO so that we now have flags for MDSIO and/or MNC
521      - all verification tests compile and run with linux_ia32_g77
522      - defaults are compatible with current input files--nothing
523        should change if you were not previously using MNC
524      - MNC output has been added in numerous places (eg. timeave)
525        but there are still a few writes not yet do-able with MNC
526        (this is in progress)
527      - flags now allow for either/or/both use of MDSIO and MNC and
528        documentation will soon follow
529      - numerous small formatting cleanups for ProTeX
530    o add version info (via BUILD_INFO.h) to MNC and stdout
531    
532    checkpoint54e_post
533    o add two new packages
534      - pp81 (Packanowski and Philander, 1981), Richardson number and
535        stratification dependent mixing
536      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
537      - these scheme operate in a similar manner as KPP (without ghat, of
538        course), however there is only one diffusivity that is used for both
539        temperature and salinity (and passive tracers)ç
540    o add offline package
541    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
542      provided by Stephanie Dutkiewicz
543    o genmake2: add ability to search for C compilers and cleanup test output
544      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
545    
546    checkpoint54d_post
547    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
548    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
549      leading to additional shift by 5 days each year of integration
550       (i.e. leading to considerable offset over the years)
551    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
552    o start with no AB and no initial filtering (staggerTimeStep):
553      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
554    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
555      (external loading & cpl import/export stay in forward_step.F)
556    o update coupling interface to work with new staggerTimeStep
557    o change MDSIO ptracers_pickup.
558    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
559    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
560    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
561    
562    checkpoint54c_post
563    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
564      this affects (truncation error) output.txt of test-exp:
565       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
566    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
567    o change Qnet to always be the net heat flux, (+upward).
568      affects (truncation error) output of natl_box exp.: updated
569    o define the max number of passive tracers in PTRACERS_SIZE.h
570    o start to test mnc routinely in exp0
571    o add sea-ice loading (sIceLoad) as a new forcing field.
572    
573    checkpoint54b_post
574    o add testreport "-j JOBS" option for parallel builds (tested and pretty
575       impressive on Altix and Opteron systems)
576    o diagnostics can now write NetCDF files through the mnc package
577    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
578    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
579    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
580      affects (truncation error) output of lab_sea & natl_box exp.: updated
581    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
582    
583    checkpoint54a_post
584    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
585    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
586    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
587    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
588      + internal_wave (shift in writing cg2d_ini_res)
589    checkpoint54a_pre
590    
591    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
592      - modified verification/lab_sea and natl_box_adjoint accordingly
593    
594    checkpoint54
595    checkpoint53g_post
596    o prepare splitting of thermodynamics: store convect.counter in common block
597    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
598      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
599    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
600    o new parameter "nShapS": allow to treat differently S from T (nShapT)
601    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
602    o restore adjointability
603    
604    checkpoint53f_post
605    o modifications that affect AIM experiment results (update output.txt):
606      - no advection of S at top interface Nr (pkg/generic_advdiff)
607      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
608    o AIM pkg:
609      - include stability function into surf.Flux derivative relative to Tsurf
610      - calculate clear-sky radiation & surface temp. change (for diagnostics)
611    
612    checkpoint53e_post
613    o merged cylindrical coord configuration
614    o added rotating_tank experiment
615    checkpoint53e_pre
616    
617    checkpoint53d_post
618    o faulks upgraded: re-generate output.txt that have changed:
619       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
620    o Added Bryan and Lewis, 1979, vertical diffusivity profile
621    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
622    o added Sadourny discretization of Coriolis
623      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
624      - re-enabled use of omega3 (useAbsVorticity)
625    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
626      vector-invariant equations
627      - note: does *NOT* yet use same variable visc. for no-slip BC's.
628    o recoded the lateral boundary conditions for non-hydrostatic w, this time
629      hopefully without new bugs
630      - still to do: biharmonic friction for non-hydrostatic w
631    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
632    o regenerated output for global_ocean_ebm (using -ieee)
633    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
634      of mom_common/
635      - simple re-arrangement of instructions within computing loop
636    checkpoint53d_pre
637    
638    checkpoint53c_post
639    o new version of coupler for AIM+thSIce and Ocean models
640     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
641     - land: change Evaporation of snow
642     - aim with thSIce: fix bug in snow-precip.
643    o changes to calc_gw.F
644     - bug fix for w^2 term near the bottom boundary
645     - (hopefully) improve the lateral slip boundary condtions for use with
646        partial/looped cells
647      - because the bug fix changes two verification experiments anyway (exp5
648        and plume on slope), change the lateral boundary condition from half slip
649        to the value of no_slip_sides
650    o ebm package wasnt quite up to the parallel task. Fixed that.
651    o Adjoint of EBM package + verification
652      * TLM OK
653      * ADM not sufficient accuracy yet (needs further testing)
654    
655    checkpoint53b_post
656    o Commiting new energy balance model to repository
657      * package is pkg/ebm
658      * verif. is verification/global_ocean_ebm
659      * references are in ebm_driver.F
660    C      * X. Wang, P. Stone and J. Marotzke, 1999:
661    C        Global thermohaline circulation. Part I:
662    C        Sensitivity to atmospheric moisture transport.
663    C        J. Climate 12(1), 71-82
664    C      * X. Wang, P. Stone and J. Marotzke, 1999:
665    C        Global thermohaline circulation. Part II:
666    C        Sensitivity with interactive transport.
667    C        J. Climate 12(1), 83-91
668    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
669    C        Destabilization of the thermohaline circulation
670    C        by atmospheric eddy transports.
671    C        J. Climate 7(12), 1870-1882
672    o Will need long integration testing.
673    checkpoint53b_pre
674    
675    o created pkg/mom_common in preparation for variable viscosity code
676    o renamed and split ini_mnc_io
677    o pkg/land: only liquid water can diffuse or run-off
678    o AIM using land: soil wetness availability account for snow
679    o added printMapIncludesZeros to EEPARMS namelist
680    
681    checkpoint53a_post
682    o restore TAMC compatiility for exf_constants.h
683      (no usage of _d in .h)
684    o Additional storing in KPP in an attempt to fix
685      TAMC problem with adjoint of KPP code.
686      (no success...)
687      Identical code works fine with TAF.
688    o Fixed verification/natl_box_adjoint experiments.
689      Initial conditions for Experiments 4 and 5 are now
690      set to "SEAICE_initialHEFF=0", which is more reasonable,
691      and hence gives results closer to that of Experiment 2.
692      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
693    
694    checkpoint53
695    o stable checkpoint with up to date adjoint
696      TLM tests only run for 1st grdchk at the moment. Its unclear if
697      this is a code problem or a problem with resetting code for g_
698      variables that is being autogenerated wrong.
699      Otherwise:
700       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
701       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
702         are both still in chaos following their security messes.
703    
704    checkpoint52n_post
705    o various build (mostly genmake2) changes including:
706      - ability to build/run more easily within Cygwin and MacOS X
707      - more complicated Makefiles with a stronger dependence on Gnu Make
708    o pkg/seaice modifications
709      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
710        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
711        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
712      - changed proxy for geostrophic velocity and updated
713        verification/lab_sea/results/* accordingly
714      - removed ADI dynamic solver from pkg/seaice
715      - replaced all occurrences of 1/CSTICE or 1/CSUICE
716        they caused a segmentation fault under certain circumstances
717      - removed unused field WATR
718    o bug fix in exf-package:
719      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
720         now reflect that.
721    o small fixes in the cal-package:
722      - set reference date to first of January for the 'model'-calendar
723      - failing of cal_CheckDate in cal_FullDate now actually results in a
724        warning
725    o small modifications in exf-package to increase flexibility:
726      - change climtempfreeze from a constant to a runtime parameter that
727        is specified in data.exf_clim (default = -1.9)
728      - introduce runtime parameter windstressmax (default = 2.0) that is
729        specified in data.exf
730    o fix in pkg/thsice:
731      - update Evap (Tsf changes) to be consistent with Latent heat flux
732      - maintain snow precipitation unchanged (even if Tsf >=0).
733     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
734    
735    checkpoint52m_post
736    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
737      this does not change any of the results, because myIter=0 in swfrac always
738      lead to jwtype=2 (the default anyway), but the call makes little sense
739      as a default
740    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
741    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
742      atmospheric model (AIM) to use it ; add a "slab ocean" component.
743    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
744    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
745    o extending useSingleCpuIO option to work with new exch2 I/O format
746      - old-style, missing-tile I/O is still accessible by defining CPP
747        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
748    o monitor package can write to NetCDF files and/or STDOUT
749    o fix re-definition bug in MNC_GRID_INIT_ALL()
750    o doc/api_reference added
751      - a framework for building an API Reference Manual using all
752        the "protex" comments embedded in the code
753      - see pkg/generic_advdiff, pkg/mnc for examples
754    o MNC:
755      - make myThid the last argument for all subroutines
756      - new default for the grid files: NO halos
757      - add useMNC and other run-time flags
758      - separate per-file-group handling of the unlimited dimension
759      - early initialization of MNC w/ flags read at the eeboot stage
760        and lookup tables set in initialize_fixed
761      - write all MNC output to a freshly-created directory
762    o thermodynamics sea-ice (thsice) is now tested with testreport.
763    o test exp. advect_cs: use the standard cs32 grid ; update output.
764    o Added functionality to grdchk:
765      pick global i,j,k position (or nearest wet) where to perform check.
766    
767    checkpoint52l_post
768    o new land formulation:
769      a) use ground enthalpy as prognostic variable to ensure exact
770         energy conservation.
771      b) account for water temperature and for latent heat of freezing
772         in all processes (rain, run-off, ground storage)
773      c) compute surface and ground temperature implicitly.
774    o aim_v23 modification for new land model:
775      a) Treat separately land / ocean / sea-ice surface fluxes
776         to allow implicit computation of land & sea-ice surface temp.
777      b) add snow precipitation.
778    checkpoint52l_pre
779    
780    o fix problem (when 1 tile is empty) in min/max monitor.
781    o fix bug in timeAve (u,vZetatave in common block)
782    o no restoring terms under ice for pkg/seaice
783    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
784    o bug fix for pkg/seaice pickups
785    o change MNC call locations and add coordinate attributes
786    o mask vorticity at the corner ; affects global_ocean.cs output
787    o fix ini_curvilinear_grid ; test CS experiments with mpi
788    o aim.5l_cs: modify sea-ice fraction input file ; update output
789    o exf: Adding simple range check routine for exf fields after read
790    
791    checkpoint52k_post
792    o removed top-level directory "diags"
793      - we migrated these functions to pkg/timeave a long time ago
794    o fixed bug introduced in pkg/monitor
795    o accuracy ctrlprec = 32 insuffient for gradient checks using
796      averaged fields (I/O via cost_averages)
797      -> use ctrl.h in active_file*.F to control I/O precision.
798    o paramter list of CALL ADTHE_MAIN_LOOP
799    o added initial do_the_model_io to ecco
800    o set all ...Freq to zero after cost_final
801      taveFreq, dumpFreq, pChkptFreq
802    o MAIN and ECCO differentiability restored
803    
804    checkpoint52j_post
805    o fix nchklev in tamc.h for global_ocean...
806    o Bringing flow and store directives up-to-date
807    o Really weird thing!
808      call do_the_model_io from the_main_loop with parameters
809      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
810      TAF places a faulty re-call of initialise_varia
811      after cost_final call which should not be there!
812    checkpoint52j_pre
813    
814    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
815      error messages
816    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
817    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
818      debug output
819    o modfied mdsio_writefield.F to handle non-global files under exch2
820    o update AIM Cubed-Sphere exp (aim.5l_cs):
821      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
822    o update AIM Equatorial Channel exp:
823      use standard aim_v23 pkg and change the SST fields to be more realistic.
824    o globalFile now works with exch2
825    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
826      mon_vort3.F to make exch2 friendly with >1 tile per cube face
827    o limit timeave output for hi-res integrations
828    
829    checkpoint52i_post
830    o removed CPP_EEOPTIONS.h from verification/*/code
831    o updated the tiling for global_ocean_pressure
832    checkpoint52i_pre
833    
834    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
835      the old pkg/aim).
836    
837    checkpoint52h_pre
838    o shortened offending lines in exch2_send_rx?.template
839    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
840    o genmake2: add build & execute test for NetCDF code
841    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
842      old grid files, moved CPP_EEMACROS.h to pkg/exch2
843    o added useSingleCPUIO flag to monitor.F and mon_out.F
844    o added temporary hack for sea-ice dynamics on the cube:
845      metric terms are ignored and it is assumed that
846      there is no sea-ice on cube faces 1, 2, 4, and 5.
847    
848    checkpoint52f_post
849    o added exch2 cube routines to pkg/exch2
850    o modified hs94.cs-32x32x5 to use it
851    o added new grid files to hs94.cs-32x32x5
852    checkpoint52f_pre
853    
854    checkpoint52e_post
855    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
856      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
857    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
858      to work with implicit vertical advection and AB ;
859    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
860    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
861     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
862    checkpoint52e_pre
863    
864    o fix bug in impldiff when Nr=1 or Nr=2.
865    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
866    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
867    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
868      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
869    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
870    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
871    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
872    
873    checkpoint52d_post
874    o re-tiled many expts to allow comparison in multi-processor mode
875      - updated output accordingly
876      - changed hs94.128x64x5 to use intial T from file rather than use the
877        random number generator
878    o add infrastructure in model routines for fizhi and gridalt packages
879    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
880    o changes to permit hi-res, cubed-sphere, configuration
881      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
882      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
883      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
884        of surface winds for the cube
885      (A verification experiment, based on global_ocean.cs32x15, but with
886       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
887       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
888       complete with example surface forcing files and matlab scripts to look
889       at the output and compare it with that of global_ocean.cs32x15.)
890    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
891       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
892       to conform to the common rule.
893    o check-in the first version of the coupler + interfaces for multi-components
894       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
895       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
896       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
897       - ocean and atmos. share the same horizontal grid (no interpolation).
898       - exchanges between component and coupler is done in forward_step
899    o new verification experiment, cpl_aim+ocn:
900       coupled ocean - AIM atmosphere on cs32 grid.
901    
902    checkpoint52d_pre
903    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
904    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
905    
906    checkpoint52c_post
907    o Fixing OPTIONS files for use of exf:
908      - ALLOW_ECCO not needed
909      - ECCO_CPPOPTIONS.h should not be included from
910        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
911        as has been the case in the past
912      - All cal/exf related options are currently set in
913        single header file. Should remain so until we
914        agree on a consistent new policy.
915    o Removed all CPP options for cal package.
916      cal has no more CPP options.
917    o modified STOREs in GAD_ADVECTION
918    o corrected key comp. for passkey
919    
920    checkpoint52b_post
921    o new version: "thsice" of thermodynamic sea-ice pkg:
922     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
923     - modify fluxes but do not change theta directly;
924     - light cleaning of bulk_force pkg (still needed with thsice).
925     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
926       + output_thsice.txt to test thsice & bulk_force pkgs.
927    o put back grid & coriolis monitor output.
928    checkpoint52b_pre
929    
930    o call "do_the_model_io" at the beginning (=> dump initial state)
931    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
932    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
933      (need info on NUMBER_OF_PTRACERS)
934    o missing PTRACERS headers in some routines
935    o default tamc.h in pkg/autodiff supposed to crash
936      to ensure proper customization
937    
938    checkpoint52a_post
939    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
940      - moved surfaceTendencyTice from pkg/seaice to main code
941      - subroutine FREEZE_SURFACE now limits only surface temperature
942        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
943        => new output.txt for global_ocean.cs32x15 & global_with_exf
944      - keep the old version of FREEZE for backward compatibility;
945        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
946      - corresponding modifs for TAF directives
947    o added surface flux output variables to TIMEAVE_STATVARS
948    o time-averaged output for pkg/ptracers
949    o fix problem with ECCO-related divided adjoint
950      snapshot file was missing some ad-variables,
951      but no warning issued by TAF
952    
953    checkpoint52a_pre
954    o some bug fixes for #undef REAL4_IS_SLOW
955    
956    checkpoint52 = ecco_c52_e35
957    o after testing adjoints of checkpoint51u_post
958    
959    checkpoint51u_post
960    o this is the post-merge tag of the ecco-branch
961      (needs another clean checkout and re-testing)
962    o various natl_box_adjoint configs and results
963      but no input fields
964    o obcs adjoint not yet merged!
965    o adding ECCO global 1x1 and 2x2 degree configs
966    o updated/extended some store directives for seaice
967    o pkg/ecco now containes ecco-specific part of cost function
968    o top level routines the_main_loop, forward_step
969      supersede those in model/src/
970      previous input data.cost now in data.ecco
971      (new namelist ecco_cost_nml)
972    o in ctrl/ cleaned some cross-dependencies and updated CPP options
973    
974    checkpoint51t_post
975    o this is the pre-merge tag of the ecco-branch
976    
977    checkpoint51s_post
978    o cleanup: removed various obsolete #define-s
979    o pkg/grdchk
980      - renamed 'ph-grd 3' to 'grad-res'
981      - merged from ecco-branch
982        (remaining bug fixes for obcs gradient checks)
983      - additional high-precision output for testreport
984        (grep for 'precision_grdchk_result')
985    
986    checkpoint51r_post
987    o cleaned up or removed CPP_OPTIONS.h files
988    o updated results for some of the tests to reflect the new
989      optfiles (-ieee: -O0 instead of -O3)
990    
991    checkpoint51q_post
992    o cd_code:
993      - moved cd_scheme.F -> cd_code_scheme.F
994      - separate read_checkpoint from cd_code_ini_vars.F
995      - separated cd_code part from write_checkpoint
996      - updated AD_SOURCE, generated .flow
997      - added CD_CODE_VARS.h to the_main_loop
998      - Moving cd_code specific store dir.s to pkg/cd_code
999    o ctrl package totally restructured
1000      - pack/unpack now optional and decoupled from
1001        xx_/adxx_ I/O
1002      - ctrl_pack/unpack cleaned
1003        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1004      - confined inclusion of AD_CONFIG.h to where necessary.
1005    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1006    
1007    checkpoint51p_post
1008    o create initial cd_code package
1009      - WARNING: the initialization of fields within packages
1010        is broken because INI_FIELDS (where READ_CHECKPOINT is
1011        called) is called *before* PACKAGES_INIT_VARIABLES.
1012        This seems to be backwards since
1013        1) its important to initially zero the entire field including
1014           the "halo" region
1015        2) zeroing needs to be done *before* reading pickup info
1016           and the pickup call might or might not happen in any
1017           particular run
1018      - this needs an overhaul for R2
1019    o cleanup verification/*/code/GMREDI_OPTIONS.h
1020    o cleanup testreport
1021    
1022    checkpoint51o_post
1023    o bringing AD-related verif's up to date with genmake2
1024      - carbon/
1025      - global_ocean.90x40x15/
1026      - hs.94.1x64x5/
1027      - (front_relax/ )
1028    o (more) consistent directory structure for AD-related verif.'s
1029    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1030    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1031    o bug fix in find_alpha.F for MDJWF:
1032      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1033        change rho -> rho-rhoConst
1034      - replace call find_rho to find_rhonum
1035    o initialisation of rFlx extended to full array (required by TAF)
1036      and shifted to thermodynamics
1037    o removed PTRACERS.h in ptracers routine
1038    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1039    o Correcting initialisations for fVerU, fVerV.
1040    o helping TAF to recognize dependency on kUp for
1041      fVerU, fVerV
1042    o Replacing delZ by delR in pkg/ctrl/
1043    checkpoint51o_pre
1044    
1045    o undid all of cp51 pending some cleanups and discussion
1046    o added the [#include "AD_CONFIG.h"] statement to all files that need
1047       it for adjoint/tl #defines
1048     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1049     o removed tools/genmake since it no longer works
1050    
1051    checkpoint51n_post
1052    o modifications to make FREEZE flux visible to pkg/kpp
1053      - moved surfaceTendencyTice from pkg/seaice to main code
1054      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1055      - subroutine FREEZE now limits only surface temperature
1056        (this means new output.txt for global_ocean.90x40x15,
1057         global_ocean.cs32x15, and global_with_exf)
1058    o added surface flux output variables to TIMEAVE_STATVARS
1059    
1060    checkpoint51n_pre
1061    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1062    o added [#include "AD_CONFIG.h"] to all files that use the following
1063      defines:
1064      - ALLOW_ADJOINT_RUN
1065      - ALLOW_TANGENTLINEAR_RUN
1066      - ALLOW_ECCO_OPTIMIZATION
1067    
1068    checkpoint51m_post
1069    o incorporating changes to get TAMC/TAF working in genmake2
1070      - added new TAMC/TAF targets to the Makefile
1071      - various cleanups related to package handling
1072      - these changes should have no impact on the forward model
1073    
1074    checkpoint51l_post
1075    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1076     - faster algorithm for cal_addtime.F
1077     - higher precision arithmetic, where needed
1078     - pkg/exf *startdate variables changed from calendar date to
1079       model integration time
1080    
1081    checkpoint51l_pre
1082    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1083    o enable to apply restoring on S & T only in a latitude band.
1084    o update output (external_forcing_surf modif. change truncation errors)
1085       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1086    
1087    checkpoint51k_post
1088    o change default to: useNHMTerms=.FALSE.
1089     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1090       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1091     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1092        exp1, ideal_2D_oce
1093     - change data file of oceanic exp (leave the results unchanged for now)
1094       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1095    o set gravitySign automatically according to the vertical coordinate used
1096      (and change sign: back to "logical" value: +1 when R increases downward)
1097    o added an include barrier to the default CPP_OPTIONS.h and
1098      removed the #include "PACKAGES_CONFIG.h" from it
1099    o fix a bug in mom_fluxform (from chk51j_post)
1100    
1101    checkpoint51j_post
1102    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1103    o adjusted some flow directives (dynamics, thermodynamics)
1104    o added cubed-sphere case to test cost function
1105    o heckpoint_lev?_directives.h now include
1106      pkg-specific directives, whenever those are enabled.
1107    o Moving pkg-specific flow directives to corresponding pkg
1108      Moving pkg-specific differentiation list to corresponding pkg
1109      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1110      ---> conventions are
1111           - pkg_ad.flow
1112           - pkg_ad_diff.list
1113           - pkg_ad_check_lev?_dir.h
1114    
1115    checkpoint51i_post
1116    o merge of the branch-genmake2
1117      - knowingly breaks the older genmake
1118      - automatic generation of all ALLOW_${PKG_NAME} defines
1119      - new testreport supersedes older testscript
1120    o large number of package inclusion and header cleanups
1121    checkpoint51i_pre
1122    
1123    o new output for adjoin of global ocean vector invariant
1124    o fix for checkpoint of thermodynamic seaice and bulk_force
1125    o Steph gchem various cleanups
1126    
1127    checkpoint 51h_pre
1128    o fixed some single quotes
1129    o modify gchem pkg to be more versatile
1130    o modifications to clean up dic pkg
1131    o add pkg/cfc
1132    
1133    checkpoint51g_post
1134    o provide links for ARPACK and ADM*TLM
1135    o start removing verification/vero/
1136    o update AD-related stuff
1137      (in particular some IF-statements in model/src/ routines)
1138    o adding to verification/global_ocean.90x40x15/ adjoint of
1139      vector invariant setup
1140    
1141    checkpoint51f_post
1142    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1143    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1144      of tracer Green's fucntions for ocean inversion project.
1145    
1146    checkpoint51f_pre
1147    o Added on-the-fly spatial interpolation capability
1148        "USE_EXF_INTERPOLATION" to pkg/exf.
1149      - This is a temporary Cartesian-grid hack until
1150        the super-duper ESMF coupler becomes available.
1151      - See verification/global_with_exf/README for usage example.
1152      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1153        flags and modified pkg/seaice accordingly.
1154    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1155        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1156        non-local transport term.
1157    
1158    checkpoint51e_post
1159    o pkg/mom_vecinv:
1160      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1161      - add time-ave diagnostic of vorticity advection.
1162    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1163    o atmospheric geopotential: - include water vapor effect;
1164                                - use p^kappa in p* scaling.
1165    o land pkg: read initial state from files.
1166    o AIM : add stratospheric drag in the upper level
1167    
1168    checkpoint51d_post
1169    o change function ILNBLNK (=> last non-blank char.) to return zero
1170      (instead of the string length) when the string. char is empty
1171    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1172    o modif's to restore TAMC compatibility
1173      - avoid "_d" constructs in PARAMETER declarations
1174      - avoid interrupting lines by comment lines
1175    o Use cluster local disks for purely local I/O
1176      vs. globally visible disks needed for ctrl stuff
1177      (merged from ecco-branch)
1178      - new active_file_loc... and mdsio_..._loc routines
1179      - affected packages: autodiff, ctrl, grdchk, mdsio
1180    
1181    checkpoint51c_post
1182    o introducing integer flag debugLevel
1183      - debLevZero: suppress all output
1184      - debLevA: standard
1185      - debLevB: equivalent to current debugMode=.TRUE.
1186    o introducing pathname variable mdsioLocalDir for mdsio
1187      that can be specified at runtime
1188      (relevant for cluster I/O to local disk)
1189    `
1190    >>>checkpoint51b_post
1191    adjoint of ptracers
1192    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1193    o extended state in checkpoint_lev?, etc.
1194    o alternative ctrl/cost with tr1 or ptracer
1195    o new comlev1_bibj_ptracers
1196    o new ptracers.flow
1197    o made ptracers_forcing same as external_forcing_s
1198    o added verification for adjoint with ptracers
1199      - adm. grdchk fail so far
1200      - tlm. grdchk OK
1201      - checked tapelev/comlev recomputations: OK
1202    <<<checkpoint51b_pre
1203    
1204    checkpoint51a_post
1205    o added code for biogeochemistry package
1206      - new pkgs: dic, gchem
1207      - new subroutine in ptracers
1208    o modify code for biogeo packages
1209      - in model/src and pkg/ptracers
1210    
1211    checkpoint51
1212    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1213      - autodiff, ctrl, exf, grdchk, seaice
1214      kept separate packages
1215      - cost, ecco, obcs
1216    o updating verification/internal_wave, verification/lab_sea
1217      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1218    
1219    checkpoint50i_post
1220    o Preparing next differentiable checkpoint and sync
1221      of MAIN vs. ecco-branch
1222      - 1st step: this one is differentiable
1223      - 2nd step: next(! not this) checkpoint will have updated packages
1224                  from ecco-branch)
1225    
1226    checkpoint50h_post
1227    o new package "land": provide surface BC for AIM.
1228    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1229    o AIM: use true log-P extrapolation for near surface temp (= as in
1230        F.Molteni paper) ; update aim.5l_cs output.
1231    o New variable in PARM03 for more flexible pickups
1232    o somewhat cleaned package initialisation sequence for
1233      ctrl/ cost/ ecco/ in packages_... routines
1234    
1235    checkpoint50g_post
1236    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1237      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1238      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1239        made the default because of faster convergence than ADI
1240    
1241    checkpoint50f_post
1242    o exf totally restructured
1243      - replaced all exf_set_ routines by one generic exf_set_gen.F
1244        and made sure it's still differentiable
1245      - split exf_getffields.F into new exf_bulkformulae.F
1246      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1247      - updated adjoint/makefile and relevant verif. accordingly
1248    
1249    checkpoint50f_pre
1250     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1251          + change Evap over land. (update aim.5l_cs output)
1252     o added missing .cvsignores and made uniform across expts
1253     o changed configuration of tidal_basin_2d expt
1254     o added pkg/debug functions for tracing code in fatal crashes
1255     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1256     o new fn in pkg/monitor to stop model if solution grows too big
1257     o removed lots of single quotes from comments
1258    
1259    checkpoint50e_post
1260    o make KPP work with PTRACERS
1261     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1262       nearly a copy of kpp_transport_s
1263     - there is no analogue to SurfaceTendencyS, so I have to use
1264       gPtr(of the surface layer) instead
1265    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1266    checkpoint50e_pre
1267    
1268    checkpoint50d_post
1269    o change kpp output from multiple-record state files to single-record state
1270      files analogous to write_state.F
1271    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1272      analogous to the cg2d-related output.
1273    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1274      so that writing to internal file fn (with length 512) fails.
1275    checkpoint50d_pre
1276    
1277    checkpoint50c_post
1278    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1279    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1280    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1281    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1282    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1283    
1284    checkpoint50c_pre
1285    Merging from release1_p13:
1286    o bug fix for pkg/seaice dynamic solver
1287    o Added SEAICE_initialHEFF to pkg/seaice
1288    
1289    checkpoint50b_post
1290    o store u*,v* in gU,V instead of in guNm1,gvNm1
1291    o in order to put the momForcing out of the Adams-Bashforth:
1292      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1293      to timestep.F
1294    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1295    o re-generate output for highly sensitive test-exp:
1296       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1297    
1298    checkpoint50b_pre
1299    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1300    o corrected CPP option mismatch in exf_Bulk... functions for case
1301      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1302    
1303    checkpoint50a_post
1304    o Bug fix for merging between c50 and KPP.
1305      ikey was passed from thermodynamics to kpp_calc via
1306      common block rather than being recomputed in kpp_calc,
1307      in contradiction with new key itdkey.
1308      New key ikppkey created, and tamc.h headers updated.
1309    
1310    checkpoint50
1311    - 2nd step of merge with ecco-branch:
1312      merge changes in ecco-branch back into main trunk
1313    - bug fix in find_alpha
1314    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1315    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1316    - merged some sliced AD support routines
1317    
1318    checkpoint49
1319    merged from ecco-branch:
1320    o exf:
1321      - Enable initialisation of forcing fields to constant
1322        (runtime) values.
1323      - in exf_getffields.F
1324        Reduce i-/j-loop to interior domain, discarding overlaps.
1325        That also fixes wrong TAF-key computations for key_1, key_2
1326        with bulf formulae.
1327      - exf_init.F modify #ifdef for exf_init_evap
1328      - exf_getffieldrec.F, ctrl_getrec.F
1329        The following INT-usages are not safe:
1330          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1331          fldcount = int(fldsecs/fldperiod) + 1
1332        and were modified.
1333    o autodiff: checkpoint_lev...
1334      - updated storing for bulk formulae (some arrays were missing)
1335      - added state for seaice package
1336      - synchronized with main branch
1337    o DIVA:
1338      Modif.s in
1339      - the_main_loop.F
1340      - the_model_main.F
1341      and added cost_final_restore.F cost_final_store.F
1342      o With these changes, it is possible to fully separate
1343        the first forward run to compute the cost function (mdthe_main_loop)
1344        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1345        into separate model executions.
1346        This enables better tuning of DIVA to given queue sizes.
1347      o Loss of cost function value in consecutive DIVA runs is
1348        fixed by storing to 'costfinal' file.
1349      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1350        beginning/end of adjoint integration is accounted for.
1351      The current changes apply to TAF-1.4.26.
1352      TAF has one remaining bug, requiring one manual change
1353      (see MITgcm manual).
1354    o cal: synchronized between MAIN and ecco-branch
1355    
1356    checkpoint48i_post
1357    o Changes to restore differentiability of code w.r.t. previous tag
1358      (mostly adding new routines to make list and replacing
1359      pressure by totPhiHyd).
1360    o Updated and merged grdchk package
1361      - has both ADM and TLM checks
1362      - works for single- and multi-proc.
1363      - output cleaned
1364      - worked successfully for parallel DIVA
1365    o genmake:
1366      - Adding -platform=SP4
1367      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1368    o Modif. for DIVA:
1369      ctrl_unpack should not be called in intermediate DIVA interval.
1370      (similar thing would apply for active files such as
1371      tbar, sbar, psbar, which should not be reinitialised;
1372      only relevant for ecco-branch)
1373    
1374    checkpoint48h_post
1375    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1376    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1377    o Added SEAICE_initialHEFF to pkg/seaice
1378    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1379    
1380    checkpoint48g_post
1381    --- EOS:
1382    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1383      store total Potential in totPhyHyd for diagnostics & EOS.
1384    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1385    --- Pressure/geopotential gradient:
1386    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1387    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1388      ( changes results of global_ocean_pressure )
1389    o NLFS + z-coord.: add eta*Rho' contribution.
1390    o accurate phiHyd when using interface-W at the middle between 2 centers
1391     ( changes results of ideal_2D_oce )
1392    o includes r* 2nd term in potential gradient.
1393    
1394    checkpoint48f_post
1395    Merging from release1_p12:
1396    o Modifications for using pkg/exf with pkg/seaice
1397      - improved description of the various forcing configurations
1398      - added basic radiation bulk formulae to pkg/exf
1399      - units/sign fix for evap computation in exf_getffields.F
1400      - updated verification/global_with_exf/results/output.txt
1401    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1402      (SBO) core products, including oceanic mass, center-of-mass,
1403      angular, and bottom pressure (see pkg/sbo/README.sbo).
1404    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1405      to avoid negative values in shallow regions.
1406      - updated verification/natl_box/results/output.txt
1407      - updated verification/lab_sea/results/output.txt
1408    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1409    o Added useSingleCpuIO option (see PARAMS.h).
1410    o Updated useSingleCpuIO option in mdsio_writefield.F to
1411      work with multi-field files, e.g., for single-file pickup.
1412    o pkg/seaice:
1413      - bug fix in growth.F: QNET for no shortwave case
1414      - added HeffFile for specifying initial sea-ice thickness
1415      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1416    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1417      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1418    o pkg/seaice:
1419      - adjoint-friendly modifications
1420      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1421    
1422    checkpoint48e_post
1423    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1424    o dynamics: change definition of computational domain & adapt mom_fluxform
1425      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1426    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1427        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1428        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1429        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1430        inverted_barometer solid-body.cs-32x32x1
1431      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1432    
1433    checkpoint48d_post
1434    o in preparation for r*:
1435     a) use pre-computed gradient of hydrostatic potential:
1436        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1437     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1438        => affects results of glob_oce_pressure (different truncation error)  
1439      update output.txt of ideal_2D_oce & global_ocean_pressure
1440    
1441    checkpoint48d_pre
1442    o in preparation for r*:
1443      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1444      pass the 2 comp. of the grad. as arguments to momentum S/R.
1445      but for the moment, only used if it does not change the results.
1446    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1447    
1448    checkpoint48c_post
1449    Modifications in treatment of initial flux forcing controls
1450    to avoid extra storing of flux fields.
1451    
1452    checkpoint48c_pre
1453    o Added tidal_basin_2d experiment (currently 1D!)
1454    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1455    
1456    checkpoint48b_post
1457    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1458     (modification to pressure gradient not yet implemented)
1459    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1460      (for U & V) that are used for vertical advection of momentum.
1461    
1462    checkpoint48a_post
1463    o In preparation for r*, use temp. array to compute vertical transport
1464       in flux-form momentum pkg. => change results of few test-exp.
1465      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1466                        lab_sea, natl_box & plume_on_slope
1467    
1468  checkpoint48  checkpoint48
1469    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1470    
1471    checkpoint47j_post
1472    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1473    o moved adexch from forward_step to addummy_in_stepping
1474    o added exch in ctrl_map_...
1475    o aveFreq.=0. at end of cost_final to avoid overwrite in
1476      reverse checkpointing loop
1477    o Yet more changes in gmredi:
1478      * adgmredi_calc_tensor
1479        avoiding all recomputation of gmredi_slope_limit
1480      * adgmredi_x/y/rtransport
1481        added flag for excessive storing to avoid recomp. of
1482        u/v/rtans, dTdx/y/z
1483        -> this is not really necessary and very memory-consuming
1484      * adgmredi_slope_psi:
1485        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1486      * gmredi_slope_limit
1487        re-activated full calculation of taperfct for case 'ac02'
1488    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1489    
1490    checkpoint47i_post
1491    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1492    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1493      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1494    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1495    o gmredi: fix few bugs.
1496    
1497  checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)  checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1498  This will be a good checkpoint to plug into the ecco-branch.  This will be a good checkpoint to plug into the ecco-branch.
1499  o few modif.'s to get latest version adjointed  o few modif.'s to get latest version adjointed

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