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revision 1.70 by jmc, Sat Apr 6 01:36:25 2002 UTC revision 1.514 by jmc, Thu Jul 14 15:34:00 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    
7    checkpoint57l_post
8     tag before updating tutorials (pre-release-2)
9    o add cos & sin of grid-direction orientation angle (curvilinear grid only,
10       for output and interpolation of input fields onto model grid)
11    o fix radius in mom_v_metric_cylinder.F (wrong by dy/2).
12       Affects results of exp. rotating_tank ; update output.txt.
13    o pkg/diagnostics: 2 new S/R to fill a diagnostics using a scaling factor
14          and taking the square quantity and/or using a fraction-weight field.
15    o fix aim_diagnostics_init.F mate numbers.
16    o add mnc output capability to diagnostics/diagstat and update
17      our cvsignore files for the ACSII output generated
18    
19    checkpoint57k_post
20    o lab_sea now uses diagnostics package and provides a suite of
21      new EXF diagnostics output.
22    
23    checkpoint57j_post
24    o exf
25      * bug fix in exf_bulkformulae for psimh (spotted by Eliyahu Biton):
26        Bracket missing in eqn. for psimh (eqn. 7 of Large & Pond, 1982);
27        terms -2*ATAN(x) + pi/2 were added to both stable and unstable case.
28      * extended diagnostics output
29        - now includes all EXF variables
30        - hs, hl moved to common block
31        - separate S/R for diagnostics, called after ctrl vector is added
32        - name changed for EXFsw -> EXFswnet, EXFlw -> EXFlwnet
33        - EXFqnet contains true Qnet (i.e. includes qsw)
34      * updated verif. lab_sea, global_with_exf
35      * Rearranging hflux (exf_mapfields -> exf_getforcing)
36        to ensure that diagnostics sees a true EXFqnet
37    o add matlab scripts for CS-grid vectors (in utils/cs_grid)
38    o diagnostics pkg: change pointers so that 1 diagnostic can be used
39      several times with different frequencies.
40    o mnc-ify the thsice package as requested by Daniel Enderton
41      - the monitor--MNC output needs work
42      - many attributes need to be added (most are currently blank)
43    o mnc-ify theaim_v23 package as requested by Daniel Enderton
44      - many attributes need to be added (most are currently blank)
45    o remove "groundAtK1" & "rkFac" (replaced by usingPCoords & -rkSign)
46    o add Sadourny like discretization to the 4th.O vorticity advection scheme
47    o fix bug in rStar code (calc_r_star.F) when used with topo/bathy.
48      update output.txt from: aim.5l_cs (& .thSI), cpl_aim+ocn,
49         fizhi-gridalt-hs and global_ocean.cs32x15 (& .thsice).
50    o fix few little things to avoid floating error with -ftrapuv (ifort v9)
51     (ini_spherical_polar_grid.F, calc_r_star.F, monitor/mon_surfcor.F)
52    
53    checkpoint57i_post
54    o Diagnostics package was changed: diagnostic allocation is now deactivated
55      by setting an empty file name in the namelist (used to be by setting 0 frequency)
56    o momentum advection (VI form) options: activate 4th.O vorticity Coriolis ;
57      add 1rst Order upwind vertical Shear.
58    o add a quick fix for A/B checkpointing in OFFLINE mode
59    o add IGNORE_TIME define and -ignore_time option to genmake2 as an
60      end-run around the C/Fortran linking horror in eesup/src/timers.F
61    o added pkg/runclock: allows user to terminate run based on wall clock
62    o added non-hydrostatic scaling parameter: nh_am2
63    o pkg/my82: futile attempt to make results compiler-independent by adding
64      some "_d 0", etc. no effect.
65    o for mnc output, fill the 'T' coordinate var with myTime and create a
66      separate 'iter' variable for iteration count
67    o pkg/diagnostics:
68      add new capability: output of Global/Regional & per-level statistics ;
69      tested against monitor output (including land & thSIce) on various exp.
70    o make seaice-pkg I/O type flags (MNC/MDS) more standard.
71    
72    checkpoint57h_done
73      tag after changing user customized files (DIAGNOSTICS_SIZE.h,
74      data.diagnostics, data.gchem, data.ptracers) is done.
75    
76    o pkg/diagnostics: prepare for Global/Regional statistics.
77      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
78    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
79      and rename it: DIFFERENT_MULTIPLE
80    
81    checkpoint57h_post
82    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
83    o pkg/diagnostics: change output frequency, now in seconds (instead
84      of Nb of iterations). This requires to change data.diagnostics.
85    checkpoint57h_pre
86    
87    o in mnc, let the user create the output dir if both mnc_outdir_date
88      and mnc_outdir_num are false
89    o add fflags() to pkg/diagnostics which allows one to specify, on a
90      per-file basis, the file precision [default behavior is unchanged]
91    o added diagnostics to pkg/kpp, including computation of mixed layer
92      depth based on a temperature/density criterion
93    o updated verification/natl_box to test the new pkg/kpp diagnostics
94    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
95    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
96    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
97      not mnc -- this mistake was found by JMC and is now corrected
98    
99    checkpoint57g_post
100    o add Adams-Bashforth 3rd Order time stepping:
101      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
102      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
103    checkpoint57g_pre
104    
105    o make lambda[Theta,Salt]ClimRelax spatially varying
106      (default remains spatially uniform constant based on tau)
107    o added new control variables
108      * init. uVel, vVel, etanN
109      * lambda[Theta,Salt]ClimRelax
110    o separate masks used for ctrl_pack/unpack 'from write_grid' output
111      (suggested by G. Forget)
112    
113    checkpoint57f_post
114    o add parameter "baseTime" = model base time = time at iteration zero
115      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
116      account for baseTime shift
117    o move Coriolis arrays from PARAMS.h to GRID.h
118    checkpoint57f_pre
119    
120    o mnc-ifying the seaice package
121    o introduced an alternative length scale calculation for use in the limiting
122      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
123    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
124    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
125      as well as grad(vort3).  Made it compatible with both approximate form
126      for the cubed sphere and full form of these gradients.  Added flag
127      useFullLeith to select between approximate and full form.  
128    o add "d0" in getcon.F to reduce differences between compilers/platforms
129      update output.txt of exp. fizhi-gridalt-hs
130    o change port_rand funtion to allow to set the seed.
131    o fix obscure MNC bug involving conversion between reals and integers
132      - it caused no problems with certain (eg. gcc, ifc) compilers but the
133        new version is now more standards-compliant
134    o adjoint-related modifications
135      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
136      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
137      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
138    
139    checkpoint57e_post
140    o Adding eddy stress controls a la Ferreira et al.
141    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
142    
143    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
144      update output.txt of exp. fizhi-gridalt-hs
145    o add more "Z" dimensions and associated coordinate vars to MNC
146    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
147    o parameter calendarDumps: when set, approximate months (30-31 days) and years
148      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
149      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
150      months and years.  Requires pkg/cal.
151    o diagnostics: add pickup functionality
152      - off by default for backwards compatibility
153      - current version only uses MDSIO -- MNC will be added
154    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
155    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
156    
157    checkpoint57d_post
158    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
159    o modify verification/ideal_2D_oce so that it tests the creation of mnc
160      output from the diagnostics package
161    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
162    o make genmake2 more portable by using ".$FS" instead of ".f" for more
163      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
164    o add coordinate variables to the MNC output from the diagnostics package
165    o change MNC-flags default value: true when useMNC=TRUE
166    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
167      the ability (off by default) to read the grid information using MNC
168    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
169    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
170    o do snap-shot diagnostics at the middle of the time-interval (instead of
171      at the end).
172    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
173      new test for AIM with thSIce + slab-ocean
174    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
175    o move state variable diagnostics to the beginning of the time step ;
176      (note: still needs some work specially for snap-shot diagnostics)
177      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
178    
179    checkpoint57c_post
180    o Change testing option (-ieee) to get closer agreement between g77 & ifort
181    o generate new output.txt files on faulks with g77 & the new -ieee option
182    checkpoint57c_pre
183    
184    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
185      update output.txt of exp. global_ocean.90x40x15
186    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
187      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
188    o add saltFlux(+File) forcing capability with periodicExternalForcing
189    o allow to use pkg diagnostics for GM-Redi & ThSIce output
190    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
191    o improvements for the MNC output from DIAGNOSTICS:
192      - correct handling of the unlimitied dimension
193      - all dims now have associated coordinate variables
194      - variables located at U, V, and Corner ("Z") points are now written
195        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
196        *all* data points are output
197    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
198    o added pkg/seaice/seaice_monitor.F
199    o mdsio_readfield.F can now read files visible only to master MPI process.
200    o pkg/seaice: some test code for ice-modified ocean stress
201    o exf_getffields interpolation defaults to bilinear for all scalar forcing
202      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
203      spurious negative numbers for precipitation and humidity.  Will cause
204      some small numerical differences for integrations using pkg/exf/exf_interp.F.
205    o pkg/ctrl/
206      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
207        May be enabled via doPackDiag
208      *  introduce z-scaling of
209         + gradient (doZscalePack) and
210         + control (doZscaleUnpack)
211    o pkg/mdsio/
212      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
213      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
214    
215    checkpoint57b_post
216    o simplify options in diagnostics_fill arguments (remove weird combinations)
217    o fix MNC coordinate variables so that they now contain per-face index
218      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
219      general, EXCH2 grids are only aligned to a "local" coordinate system
220    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
221    o Implement instantaneous output within pkg diagnostics:
222      setting a negative frequency in data.diagnostics produces
223     "snap-shot" output (as opposed to time-average if freq > 0)
224    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
225      NOTE: change ptracer diagnostics name: use 2 characters to work with
226            more than 9 tracers. Add also diagnostics of advect & diffus flux.
227    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
228      becomes the coordinate variable for the 'T' dimension
229    o add CF-style coordinate variables to MNC
230      - just a first cut:  numbers are meaningless on the cubesphere and
231        missing along the T axis but otherwise it works!
232    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
233    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
234    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
235      this is based directly on what the model compute, so that the content of
236      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
237    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
238    o clean up build options files for SunOS, in particular
239      - remove -traditional from xmakedepend
240      - change -xarch=v9 to -xarch=native for f77
241      - restore use of make (not gmake)
242      - add CC=gcc if using g77
243    o changes per discussion of AM, JMC, & EH3 today:
244      - move redundant "grid" variables out of "state" -- in preparation of
245        creating proper CF-style coordinate variables and in recognition
246        that any/all grid variables can be easily copied (eg. w/NCO) from
247        the grid files into any of the other NetCDF files
248      - *always* output grid variables with MDSIO (this will eventually be
249        changed)
250      - output MNC grid file if useMNC is true
251    o every instance of _END_MASTER() has been found and replaced with
252      _END_MASTER( myThid ) in order to satisfy certain picky Sun
253      preprocessors
254    o re-arrange diagnostics pkg initialisation:
255     - allow each package to extend the available diagnostics list
256     - add some checking and fix small problems (multi-threaded, ...)
257     - new S/R diagnostics_fill (replace fill_diagnostics):
258       look through the short list of active diag. (instead of the long list)
259       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
260    
261    checkpoint57a_post
262    o this set of changes restores TAMC compatibility
263      tested for global_ocean.90x40x15 adjoint on trough
264      (what a pain)
265    
266    checkpoint57a_pre
267    o some modifs in tools/build_options for sunos
268    o call ctrl_pack for ctrl at end for optimcycle=0
269    
270    checkpoint57
271    o add horizontal bi-harmonic viscosity for vertical velocity
272      - new parameter viscA4W (defaults to viscA4)
273      - affects only non-hydrostatic code
274      - to be done: no-slip lateral boundary conditions
275    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
276    o implement Implicit Vertical advection for pTracers
277    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
278      (implemented also for implicit vertical diffusion & advection)
279    o OBCS: extend application of tracer open boundary conditions
280      to a strip beyond the boundary of width Olx/Oly
281    o add call monitor to TAF set of required calls (flow directives)
282      and include in natl_box_adjoint
283    o untangle a few ifdefs related to cost, ctrl, autodiff
284      untangel a few ALLOW_ECCO_OPTIMIZATION
285    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
286      (theta2, salt2 in ecco_cost_weights)
287    
288    checkpoint56c_post
289    o OBCS as control variables
290      - update ctrl_ad_diff.list, obcs_ad_diff.list
291      - remove balance of obcs controls from default
292      - fix index bug nobcs in ctrl_init
293      - fix dummy fields filen in ctrl_pack
294      - add dummy weights for obcs
295    o lsopt: comment out fort.94 output
296    o optim:
297      - remove unnecessary header files
298      - adjusted namelists
299      - add xerbla.F to Makefile
300    o exf:
301      - multiple modifications of exf_check_range
302      - unit change in exf_init_runoff from [m/year] to [m/s]
303    o mdsio:
304      - i/o-vector change debugLevel from debLevA to debLevB
305    
306    checkpoint56b_post
307    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
308      is called from DO_THE_MODEL_IO
309      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
310      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
311      - clean up PTRACERS_WRITE_TIMEAVE a little
312    o add another verification experiment that tests both the cfc-pkg and
313      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
314      reactive tendencies treated inline with regular timestepping
315    o testreport previously did a lousy job of comparing small numbers, so
316      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
317      implemented in the little c-progam tmp_cmpnum.c which is embedded in
318      testreport.
319    o ptracers_monitor: bug fix for MPI
320    
321    checkpoint56a_post
322    o GCHEM: finish reorganizating the package
323      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
324        (introduces another 3D-array for each passive tracer, but only if
325        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
326        gchemTendency is not needed because the timestep is done separately)
327      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
328      - GCHEM is now---more or less cleanly---separate from PTRACERS
329      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
330        so clear to me how that should be done in a general way.
331    o CFC: improve formatting of output in CFC_ATMOS
332    o PTRACERS:
333      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
334        that ALL experiments with ptracers enable can be checked. This makes
335        GCHEM_MONITOR obsolete.
336      - include a runtime parameter PTRACERS_monitorFreq that defaults to
337        monitorFreq
338      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
339    o add PTRACERS (PTR0[1-5]) to testreport output
340    o exf_check_range:
341      * default changed to .TRUE.
342      * will check values for niter0 if debLevA, every timestep if debLevB
343      * STOP in exf_check_range if 'out of range'
344      * range chosen generous to allow for potential extema
345      TBD: a version with stricter range
346           permitted range would be runtime parameters
347    o GMredi:
348      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
349      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
350      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
351    o GCHEM:
352      - move call to GCHEM_FORCING_SEP, so that it is now called before
353        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
354      - introduced a useGCHEM runtime flag and applied it everywhere.
355      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
356        this flag is now only visible within GCHEM-pkg routines.
357      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
358        be replaced by a 3D array that is computed before thermodynamics; for
359        this, the tracer ID iTracer had to be included into the parameter list
360        of ptracers_forcing
361      - set up forward_step to call gchem_forcing, that will replace
362        gchem_forcing_int in ptracers_forcing
363      - cleaning up
364    o small cleaning of exch2: remove files that are also in eesupp/src
365    
366    checkpoint56
367    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
368    o mnc: cleanup "full" files--fixes out-of-memory problem
369    o ECCO-GODAE
370      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
371      * fully merged and updated from SIO code
372        windstress sign change affects
373        - exf_inscal_[u/v]stress
374        - sign of xx_tau[u/v] adjustments
375        - signs in cost_scat
376      * ctrl_get_gen: avoid update of tau[u/v] for first few days
377      * natl_box_adjoint updated and compressed
378      * 2-level checkpoint switch added
379        (tested in EXP. 1 of natl_box_adjoint)
380      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
381    o SVD
382      * first complete, non-hacked version for SVD calculations
383      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
384        performed via direct access files admtlm_vector.it????
385        (via ctrl_[un]pack)
386      * optimcycle is used for ARPACK iteration counter
387        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
388      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
389        and add linear transforms where necessary
390      * controls are initial/final SST, SSS (can be extended; need to check
391        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
392    o mdsio: filename info to both stderr, stdout
393    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
394      from sign change
395    
396    checkpoint55j_post
397    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
398      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
399    o add consistent build directories and .cvsignore files to verification
400    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
401    o make all subroutines 30 or less characters in length for certain older
402      compilers to work (a thorough search only turns up two routines in
403      pkg/ptracers)
404    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
405      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
406    
407    checkpoint55i_post
408    o change arrays for total vertical diffusivity (2.D if explicit,
409      3.D if implicit) ; each ptracer uses its own background value.
410    o added mnc/NetCDF output capability to ocn_compon_interf
411      - added bits to verification/cpl_aim+ocn so that it can run on
412        ITRDA and other clusters without the mpirun "-wd" option
413    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
414      configuration
415    o give MNC the ability to create additional files rather than
416      exceeding a specified file size limit "MNC_MAX_FILESIZE"
417      - the default is just less than 2GB which is a practical limit
418        on many systems
419    o Compute the non-local term using either KPP vertical diffusivity (=default)
420       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
421    
422    checkpoint55h_post
423    o add verification test "vermix"
424    o remove all the *_ioinc flags and replace with the single global
425      outputTypesInclusive flag
426    o allow to set a vertical profile of vertical diffusivity for T & S
427    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
428    o useMNC moved from data.mnc to data.pkg
429    
430    checkpoint55g_post
431    o Renaming carbon AD experiments to comply with testreport conventions
432    o Updating adjoint of Held-Suarez hs94.1x64x5
433    o Fixing directives for non-ECCO forward_step, after ECCO directives
434      have been fixed to avoid recomp. of do_oceanic_phys
435      Works well for global_ocean.90x40x15,
436      but recomp. issue remains for carbon
437    o Updating adjoint output for natl_box_adjoint after
438      pkg/ecco has been modified (see taga c55d_post)
439    
440    checkpoint55f_post
441    o rename to timeave_init_fixed
442    
443    checkpoint55e_post
444    o some delicate re-shuffle of store directives to avoid one
445      extra call of do_oceanic_physics
446      affects ecco_the_main_loop.F, do_oceanic_physics.F
447      checkpoint_lev1_directives.h
448    o NB: this may break global_ocean adjoint temporarily,
449      but it is clear how to fix it. Will do later, need this now.
450    
451    checkpoint55d_post
452    o ECCO specific cost function terms (up-to-date with 1x1 runs)
453    o ecco_cost_weights is modified to 1x1 runs
454    o modifs to allow observations to be read in as
455      single file or yearly files
456    o enable to read exf forcing fields as either
457      single file or yearly files (flag useExfYearlyFields)
458    checkpoint55d_pre
459    
460    o switch between 2-level and 3-level checkpointing
461    o add ability of MNC to write local and "partial" (eg. 2D slices where
462      the full 3D field is never actually stored) arrays to NetCDF files
463      with the correct (that is, the complete multi-dimensional) set of
464      array indicies
465      - used in mom_vecinv() to write the diagFreq output
466      - tested (demonstrated) in verification/aim.5l_cs
467    o further mnc-ification
468      - add verification/lab_sea to the list with mnc setups
469      - fix undefined mnc v-names in cd_code
470      - add kpp to mnc output (both snapshot and timeave)
471    o non-hydrostatic code
472      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
473        in calc_gw.F
474      - defaults to viscAh
475      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
476        friction or Leith) in non-hydrostatic mode, as long as there is
477        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
478    o pkg/cost
479      extend simple cost functions to treat time mean quantities
480      (T,U,V) via cost_accumulate_state from cost_tile
481    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
482        be 2 times larger than the minimum size the advection scheme requires.
483        now get a perfect conservation of salt in advect_cs test-exp (updated)
484    o GGL90 (Gaspar's TKE mixed layer)
485      - add horizontal diffusion of TKE, requires exchanges in
486        do_fields_blocking_exchanges, horizontal diffusivity is zero by
487        default. In OPA there is no horizontal diffusion of TKE but the
488        mixing coefficients are computed from a horizontal average of TKE of
489        6 points or so. I think that diffusion has a little more physical
490        justification.
491      - clean up ggl90_calc in the hope of reducing memory usage (this hope
492        was in vain)
493      - mask tke-variable in ggl90_init
494    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
495    o fix biharmonic diffusion on CS-grid.
496    o more obcs stuff
497      - added obcs_external_fields_load as an alternative to the EXF-pkg option
498        for reading boundary values. This routine is called from
499        obcs_prescribe_read
500      - updated obcs_check
501      - changed sponge layer relaxation parameter units for days to seconds
502      - turned off sponge layer by default
503      - changed argument list of OBCS_CALC to myTime+deltaTclock
504      - fixed about 35 bugs in obcs_external_fields_load
505    
506    checkpoint55c_post
507    o obcs stuff
508      - new runtime flags useOBCSprescribe, useOBCSbalance
509      - re-arranged obcs_calc
510      - moved exf_getobcs to obcs_prescibe_read
511        obcs_prescibe_read is called after ORLANSKI stuff
512        and independent of it (executable can contain all).
513      - updated obcs_check
514      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
515        These may be necessary only if tangential velocities are
516        prescribed at OB, not sure, needs testing.
517    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
518      which simplifies the calls and passes the ifc check-bounds test
519    
520    checkpoint55b_post
521    o add a 2D scalar, Z location, exchange_2 routine.
522    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
523      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
524      affects advect_cs results (for the wrong reason): update output.txt
525    o use a more standard discretization for biharmonic viscosity ;
526     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
527      affects results of dome set-up: update output.txt
528    o fix gad_advection.F (CubedSphere part), back to version 1.23
529    o fix bug in mom_vi_del2uv.F (CubedSphere part).
530    
531    checkpoint55a_post
532    o merged code to
533      * prescribe/read time-dependent open boundaries
534        (works in conjunction with exf, cal)
535      * sponge layer code for open boundaries
536      * each boundary N/S/E/W now has its own CPP option
537        (healthy for the adjoint)
538    
539    checkpoint55
540    o up-to-date adjoint of previous breaks
541      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
542      - global_ocean_ebm: adjoint still needs fix (TLM ok)
543      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
544      - carbon: * remove tr1-related adjoint verification
545                * add ptracer as control variable
546    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
547      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
548    
549    checkpoint54f_post
550    o in verification/carbin/ remove experiment related to
551      ALLOW_PASSIVE_TRACER (array tr1 etc)
552      code_ad/ input_ad/ results_ad
553    
554    o add two new packages
555      - ggl90, TKE-model of Gaspar et al. (1990), Blanke+Delecluse (1993)
556        + subject to optimization (memory)
557      - opps, OPPS (ocean penetrative plume scheme) of Paluszkiewicz+Romea (1997)
558        + subject to reordering (many GOTOs in the original code)
559        + so far opps is called for every (i,j) point, and then operates in
560          the vertical; one may want to reorder the scheme in order operate in
561          horizontal slabs at the cost of (a lot of) memory, at least ten new 3D
562          fields)
563    o overhaul of IO so that we now have flags for MDSIO and/or MNC
564      - all verification tests compile and run with linux_ia32_g77
565      - defaults are compatible with current input files--nothing
566        should change if you were not previously using MNC
567      - MNC output has been added in numerous places (eg. timeave)
568        but there are still a few writes not yet do-able with MNC
569        (this is in progress)
570      - flags now allow for either/or/both use of MDSIO and MNC and
571        documentation will soon follow
572      - numerous small formatting cleanups for ProTeX
573    o add version info (via BUILD_INFO.h) to MNC and stdout
574    
575    checkpoint54e_post
576    o add two new packages
577      - pp81 (Packanowski and Philander, 1981), Richardson number and
578        stratification dependent mixing
579      - my82 (Mellor and Yamada, 1982) level 2 turbulence closure scheme
580      - these scheme operate in a similar manner as KPP (without ghat, of
581        course), however there is only one diffusivity that is used for both
582        temperature and salinity (and passive tracers)ç
583    o add offline package
584    o add "verification/dic_example" which contains a dic-gchem-ptracer setup
585      provided by Stephanie Dutkiewicz
586    o genmake2: add ability to search for C compilers and cleanup test output
587      - fixes recent SX-6 problems and should help with others (eg. HP-UX)
588    
589    checkpoint54d_post
590    o data.diagnostics: if levels() is unspecified then ALL levels are diagnosed
591    o bug fix in pkg/cal/cal_addtime.F for TheCalendar='model' day count is wrong,
592      leading to additional shift by 5 days each year of integration
593       (i.e. leading to considerable offset over the years)
594    o update global_ocean.cs32x15/thsice: use z* + RealFW + staggerTimeStep
595    o start with no AB and no initial filtering (staggerTimeStep):
596      change the results of test-exp: hs94.128x64x5, hs94.1x64x5 & hs94.cs-32x32x5
597    o move ocean specific S/R calls from forward_step.F to do_oceanic_phys.F
598      (external loading & cpl import/export stay in forward_step.F)
599    o update coupling interface to work with new staggerTimeStep
600    o change MDSIO ptracers_pickup.
601    o fix a bug in Flux deriv. vs Ts (pkg/aim_v23/phy_suflux_sice.F);
602    o genmake2 fixes so netcdf now works on halem ("osf1_alpha_*")
603    o bugs fixed in kpp_calc.F (ustarY) and external_forcing.F (Qsw & Partial-cell)
604    
605    checkpoint54c_post
606    o replace surfaceTendency U,V,S,T,Tice,Ptr by surfaceForcing U,V,S,T,Tice,Ptr
607      this affects (truncation error) output.txt of test-exp:
608       global_ocean_ebm,_pressure,.cs32x15(&.thsice), lab_sea & natl_box
609    o pkg/kpp: replace pMask by maskC to reduce memory size (one 3.D array)
610    o change Qnet to always be the net heat flux, (+upward).
611      affects (truncation error) output of natl_box exp.: updated
612    o define the max number of passive tracers in PTRACERS_SIZE.h
613    o start to test mnc routinely in exp0
614    o add sea-ice loading (sIceLoad) as a new forcing field.
615    
616    checkpoint54b_post
617    o add testreport "-j JOBS" option for parallel builds (tested and pretty
618       impressive on Altix and Opteron systems)
619    o diagnostics can now write NetCDF files through the mnc package
620    o staggerTimeStep & NLFS: update pkg aim_v23 & thsice; update aim.5l_cs output
621    o staggerTimeStep & multi-Dim-Advec: Exch(U,V) added
622    o staggerTimeStep & NLFS: rescale T & S surface tendencies.
623      affects (truncation error) output of lab_sea & natl_box exp.: updated
624    o change pickup _cd & _ptracers (old pickup restart: usePickupBeforeC54=.T.)
625    
626    checkpoint54a_post
627    o re-write staggerTimeStep: step fwd U,V and then T,S (reverse the order).
628    o change pickup file (to restart from old pickup, set usePickupBeforeC54=.T.)
629    o get a perfect restart when using RealFreshWaterFlux + NLFS (not finished)
630    o update output of all exp. that use staggerTimeStep (except hs94.cs & 2D)
631      + internal_wave (shift in writing cg2d_ini_res)
632    checkpoint54a_pre
633    
634    o require forcing_In_AB=.FALSE. and remove surfaceTendencyTice from pkg/seaice
635      - modified verification/lab_sea and natl_box_adjoint accordingly
636    
637    checkpoint54
638    checkpoint53g_post
639    o prepare splitting of thermodynamics: store convect.counter in common block
640    o store d.etaH/dt (instead of Div.hV) in common ; affects (truncation error)
641      output of: global_ocean.cs32x15, global_ocean_pressure & internal_wave
642    o cnh's modifs to gad_advection.F for cube-sphere multi-dim advection
643    o new parameter "nShapS": allow to treat differently S from T (nShapT)
644    o separate Vert.Advec.Scheme from horizontal Advec.Scheme (T & S)
645    o restore adjointability
646    
647    checkpoint53f_post
648    o modifications that affect AIM experiment results (update output.txt):
649      - no advection of S at top interface Nr (pkg/generic_advdiff)
650      - air surf. temp: use lower value between T0 & T1 (phy_suflux_prep.F)
651    o AIM pkg:
652      - include stability function into surf.Flux derivative relative to Tsurf
653      - calculate clear-sky radiation & surface temp. change (for diagnostics)
654    
655    checkpoint53e_post
656    o merged cylindrical coord configuration
657    o added rotating_tank experiment
658    checkpoint53e_pre
659    
660    checkpoint53d_post
661    o faulks upgraded: re-generate output.txt that have changed:
662       global_ocean.cs32x15(.thsice), global_ocean_ebm, lab_sea, natl_box
663    o Added Bryan and Lewis, 1979, vertical diffusivity profile
664    o pkg/land: fix problem in land_impl_temp.F when Ts arround freezing.
665    o added Sadourny discretization of Coriolis
666      - moved some PARAMETERS from mom_*_coriolis.F to PARAMS.h
667      - re-enabled use of omega3 (useAbsVorticity)
668    o added Leith (Phys. Fluids, 1968, 10, 1409-1416) variable viscosity for
669      vector-invariant equations
670      - note: does *NOT* yet use same variable visc. for no-slip BC's.
671    o recoded the lateral boundary conditions for non-hydrostatic w, this time
672      hopefully without new bugs
673      - still to do: biharmonic friction for non-hydrostatic w
674    o bug fix for mom_*_sidedrag: rA -> rAs,rAw
675    o regenerated output for global_ocean_ebm (using -ieee)
676    o fix mom_common/mom_*_sidedrag.F to recover numeric output prior to creation
677      of mom_common/
678      - simple re-arrangement of instructions within computing loop
679    checkpoint53d_pre
680    
681    checkpoint53c_post
682    o new version of coupler for AIM+thSIce and Ocean models
683     - new fields (SSS,h_MixLayer ...) are exchanged through the coupler
684     - land: change Evaporation of snow
685     - aim with thSIce: fix bug in snow-precip.
686    o changes to calc_gw.F
687     - bug fix for w^2 term near the bottom boundary
688     - (hopefully) improve the lateral slip boundary condtions for use with
689        partial/looped cells
690      - because the bug fix changes two verification experiments anyway (exp5
691        and plume on slope), change the lateral boundary condition from half slip
692        to the value of no_slip_sides
693    o ebm package wasnt quite up to the parallel task. Fixed that.
694    o Adjoint of EBM package + verification
695      * TLM OK
696      * ADM not sufficient accuracy yet (needs further testing)
697    
698    checkpoint53b_post
699    o Commiting new energy balance model to repository
700      * package is pkg/ebm
701      * verif. is verification/global_ocean_ebm
702      * references are in ebm_driver.F
703    C      * X. Wang, P. Stone and J. Marotzke, 1999:
704    C        Global thermohaline circulation. Part I:
705    C        Sensitivity to atmospheric moisture transport.
706    C        J. Climate 12(1), 71-82
707    C      * X. Wang, P. Stone and J. Marotzke, 1999:
708    C        Global thermohaline circulation. Part II:
709    C        Sensitivity with interactive transport.
710    C        J. Climate 12(1), 83-91
711    C      * M. Nakamura, P. Stone and J. Marotzke, 1994:
712    C        Destabilization of the thermohaline circulation
713    C        by atmospheric eddy transports.
714    C        J. Climate 7(12), 1870-1882
715    o Will need long integration testing.
716    checkpoint53b_pre
717    
718    o created pkg/mom_common in preparation for variable viscosity code
719    o renamed and split ini_mnc_io
720    o pkg/land: only liquid water can diffuse or run-off
721    o AIM using land: soil wetness availability account for snow
722    o added printMapIncludesZeros to EEPARMS namelist
723    
724    checkpoint53a_post
725    o restore TAMC compatiility for exf_constants.h
726      (no usage of _d in .h)
727    o Additional storing in KPP in an attempt to fix
728      TAMC problem with adjoint of KPP code.
729      (no success...)
730      Identical code works fine with TAF.
731    o Fixed verification/natl_box_adjoint experiments.
732      Initial conditions for Experiments 4 and 5 are now
733      set to "SEAICE_initialHEFF=0", which is more reasonable,
734      and hence gives results closer to that of Experiment 2.
735      Experiment 6 requires "SEAICE_initialHEFF=1" and is working once again.
736    
737    checkpoint53
738    o stable checkpoint with up to date adjoint
739      TLM tests only run for 1st grdchk at the moment. Its unclear if
740      this is a code problem or a problem with resetting code for g_
741      variables that is being autogenerated wrong.
742      Otherwise:
743       o code is testing well on Linux (P4 and AMD), SGI Alitix and Irix.
744       o IBM and HPQ tests could not be run because NCAR (IBM) and NCCS (HPQ)
745         are both still in chaos following their security messes.
746    
747    checkpoint52n_post
748    o various build (mostly genmake2) changes including:
749      - ability to build/run more easily within Cygwin and MacOS X
750      - more complicated Makefiles with a stronger dependence on Gnu Make
751    o pkg/seaice modifications
752      - added SEAICE_deltaTtherm and SEAICE_deltaTdyn in order to reduce cost
753        of pkg/seaice.  For time being, SEAICE_deltaTtherm = deltaTtracer
754        and SEAICE_deltaTdyn must be integer multiple of SEAICE_deltaTtherm
755      - changed proxy for geostrophic velocity and updated
756        verification/lab_sea/results/* accordingly
757      - removed ADI dynamic solver from pkg/seaice
758      - replaced all occurrences of 1/CSTICE or 1/CSUICE
759        they caused a segmentation fault under certain circumstances
760      - removed unused field WATR
761    o bug fix in exf-package:
762      -  u/vwind are defined at tracer/pressure points. The values of u/vwindmask
763         now reflect that.
764    o small fixes in the cal-package:
765      - set reference date to first of January for the 'model'-calendar
766      - failing of cal_CheckDate in cal_FullDate now actually results in a
767        warning
768    o small modifications in exf-package to increase flexibility:
769      - change climtempfreeze from a constant to a runtime parameter that
770        is specified in data.exf_clim (default = -1.9)
771      - introduce runtime parameter windstressmax (default = 2.0) that is
772        specified in data.exf
773    o fix in pkg/thsice:
774      - update Evap (Tsf changes) to be consistent with Latent heat flux
775      - maintain snow precipitation unchanged (even if Tsf >=0).
776     both affect global_ocean.cs32x15/(.thsice) results ; update output.txt.thsice
777    
778    checkpoint52m_post
779    o commented out call to cal_GetMonthsRec in swfrac.F and added some comments;
780      this does not change any of the results, because myIter=0 in swfrac always
781      lead to jwtype=2 (the default anyway), but the call makes little sense
782      as a default
783    o no SHORTWAVE HEATING lost at the bottom; affects lab_sea output; updated
784    o re-work pkg/thsice interface with ocean & bulk_force pkg to allow
785      atmospheric model (AIM) to use it ; add a "slab ocean" component.
786    o pkg/aim_v23 : add interface to call thermodynamic sea-ice (thsice)
787    o update global_ocean.cs32x15/output (.thsice) after changes in pkg/thsice
788    o extending useSingleCpuIO option to work with new exch2 I/O format
789      - old-style, missing-tile I/O is still accessible by defining CPP
790        option MISSING_TILE_IO in pkg/mdsio/MDSIO_OPTIONS.h
791    o monitor package can write to NetCDF files and/or STDOUT
792    o fix re-definition bug in MNC_GRID_INIT_ALL()
793    o doc/api_reference added
794      - a framework for building an API Reference Manual using all
795        the "protex" comments embedded in the code
796      - see pkg/generic_advdiff, pkg/mnc for examples
797    o MNC:
798      - make myThid the last argument for all subroutines
799      - new default for the grid files: NO halos
800      - add useMNC and other run-time flags
801      - separate per-file-group handling of the unlimited dimension
802      - early initialization of MNC w/ flags read at the eeboot stage
803        and lookup tables set in initialize_fixed
804      - write all MNC output to a freshly-created directory
805    o thermodynamics sea-ice (thsice) is now tested with testreport.
806    o test exp. advect_cs: use the standard cs32 grid ; update output.
807    o Added functionality to grdchk:
808      pick global i,j,k position (or nearest wet) where to perform check.
809    
810    checkpoint52l_post
811    o new land formulation:
812      a) use ground enthalpy as prognostic variable to ensure exact
813         energy conservation.
814      b) account for water temperature and for latent heat of freezing
815         in all processes (rain, run-off, ground storage)
816      c) compute surface and ground temperature implicitly.
817    o aim_v23 modification for new land model:
818      a) Treat separately land / ocean / sea-ice surface fluxes
819         to allow implicit computation of land & sea-ice surface temp.
820      b) add snow precipitation.
821    checkpoint52l_pre
822    
823    o fix problem (when 1 tile is empty) in min/max monitor.
824    o fix bug in timeAve (u,vZetatave in common block)
825    o no restoring terms under ice for pkg/seaice
826    o moved SEAICE_DO_DIAGS to S/R do_the_model_io
827    o bug fix for pkg/seaice pickups
828    o change MNC call locations and add coordinate attributes
829    o mask vorticity at the corner ; affects global_ocean.cs output
830    o fix ini_curvilinear_grid ; test CS experiments with mpi
831    o aim.5l_cs: modify sea-ice fraction input file ; update output
832    o exf: Adding simple range check routine for exf fields after read
833    
834    checkpoint52k_post
835    o removed top-level directory "diags"
836      - we migrated these functions to pkg/timeave a long time ago
837    o fixed bug introduced in pkg/monitor
838    o accuracy ctrlprec = 32 insuffient for gradient checks using
839      averaged fields (I/O via cost_averages)
840      -> use ctrl.h in active_file*.F to control I/O precision.
841    o paramter list of CALL ADTHE_MAIN_LOOP
842    o added initial do_the_model_io to ecco
843    o set all ...Freq to zero after cost_final
844      taveFreq, dumpFreq, pChkptFreq
845    o MAIN and ECCO differentiability restored
846    
847    checkpoint52j_post
848    o fix nchklev in tamc.h for global_ocean...
849    o Bringing flow and store directives up-to-date
850    o Really weird thing!
851      call do_the_model_io from the_main_loop with parameters
852      starttime, niter0, instead of mytime, myiter, screws up the adjoint:
853      TAF places a faulty re-call of initialise_varia
854      after cost_final call which should not be there!
855    checkpoint52j_pre
856    
857    o tweaked pkg/mdsio/mdsio_readfield.F to have more useful logic and
858      error messages
859    o fix errorMessageUnit problem. remove old version of mdsio from eesup/src
860    o modified pkg/mdsio/mdsio_readfield.F -- commented out diskspace-eating
861      debug output
862    o modfied mdsio_writefield.F to handle non-global files under exch2
863    o update AIM Cubed-Sphere exp (aim.5l_cs):
864      use land, p*, and Franco.M forcing fields with fractional land-sea mask.
865    o update AIM Equatorial Channel exp:
866      use standard aim_v23 pkg and change the SST fields to be more realistic.
867    o globalFile now works with exch2
868    o merged mom_vi_calc_relvort3.F, mom_vi_del2uv.F and
869      mon_vort3.F to make exch2 friendly with >1 tile per cube face
870    o limit timeave output for hi-res integrations
871    
872    checkpoint52i_post
873    o removed CPP_EEOPTIONS.h from verification/*/code
874    o updated the tiling for global_ocean_pressure
875    checkpoint52i_pre
876    
877    o update aim.5l_LatLon using the standard aim_v23 pkg (instead of
878      the old pkg/aim).
879    
880    checkpoint52h_pre
881    o shortened offending lines in exch2_send_rx?.template
882    o modified W2_EXCH2_TOPOLOGY.h to reflect current topology generator
883    o genmake2: add build & execute test for NetCDF code
884    o modded aim.5l_cs and global_ocean.cs32x15 to use exch2, removed
885      old grid files, moved CPP_EEMACROS.h to pkg/exch2
886    o added useSingleCPUIO flag to monitor.F and mon_out.F
887    o added temporary hack for sea-ice dynamics on the cube:
888      metric terms are ignored and it is assumed that
889      there is no sea-ice on cube faces 1, 2, 4, and 5.
890    
891    checkpoint52f_post
892    o added exch2 cube routines to pkg/exch2
893    o modified hs94.cs-32x32x5 to use it
894    o added new grid files to hs94.cs-32x32x5
895    checkpoint52f_pre
896    
897    checkpoint52e_post
898    o first attempt to solve vertical advection (momemtum & T,S) Implicitly
899      for now, only implemented with Lax-Wendroff (tracer) and VectInv (mom)
900    o step.1 : rewrite (as in MultiDimAdvec) explicit tracer stepping (gad_calc_rhs.F)
901      to work with implicit vertical advection and AB ;
902    o Implic. vert. advect. implemented with flux-limiter, c2, u3 and c4 scheme.
903    o update output (gad_calc_rhs.F changes affect truncation error) of exp:
904     front_relax, global_ocean .cs32x15 & _pressure, internal_wave, lab_sea, natl_box
905    checkpoint52e_pre
906    
907    o fix bug in impldiff when Nr=1 or Nr=2.
908    o change the albedo in pkg/thsice (as GISS model); update output_thsice.txt
909    o little changes (fftpack, aim/phy_suflux ...) to pass the "checkbounds" test.
910    o fix deltaTfreesurf in update_cg2d.F (left from c45d_post): affects 2
911      ocean exp. that use NLFS: global_ocean.cs32x15 & global_ocean_pressure
912    o added exf_offset_atemp for Celsius to Kelvin conversion of atemp
913    o eesupp/inc/EEPARAMS.h: MAX_NO_PROCS=1024
914    o pkg/cal/cal_toseconds.F fix for long (>60 years) integrations
915    
916    checkpoint52d_post
917    o re-tiled many expts to allow comparison in multi-processor mode
918      - updated output accordingly
919      - changed hs94.128x64x5 to use intial T from file rather than use the
920        random number generator
921    o add infrastructure in model routines for fizhi and gridalt packages
922    o change global_ocean.cs32x15 because of Pb with GM on CS-grid.
923    o changes to permit hi-res, cubed-sphere, configuration
924      - added useSingleCpuIO capability to mdsio_readfield.F and exf_interp.F
925      - added "#undef ALLOW_USE_MPI" support to eesupp/src/scatter_2d.F
926      - added pkg/exf/exf_set_uv.F for on-the-fly interpolation and rotation
927        of surface winds for the cube
928      (A verification experiment, based on global_ocean.cs32x15, but with
929       pkg/seaice turned on and with on-the-fly interpolation from the NCEP
930       Gaussian grid is described in MITgcm_contrib/high_res_cube/README_ice,
931       complete with example surface forcing files and matlab scripts to look
932       at the output and compare it with that of global_ocean.cs32x15.)
933    o packages pickup: $PKG_write_pickup called from packages_write_pickup ;
934       but call to $PKG_read_pickup remains in $PKG_ini_vars: change CD_code
935       to conform to the common rule.
936    o check-in the first version of the coupler + interfaces for multi-components
937       set-up (Chris's version, adapted to work on cubed-sphere grid); use MPI.
938       - imply modification in eesupp (MPI_COMM_MODEL < MPI_COMM_WORLD).
939       - atmosphere: use pkg aim_v23 ; no sea-ice for now.
940       - ocean and atmos. share the same horizontal grid (no interpolation).
941       - exchanges between component and coupler is done in forward_step
942    o new verification experiment, cpl_aim+ocn:
943       coupled ocean - AIM atmosphere on cs32 grid.
944    
945    checkpoint52d_pre
946    o surface flux time-av diagnostic modified for NLFS & RealFreshWater
947    o add call to AIM pendant S/R in external_forcing & external_fields_load.F
948    
949    checkpoint52c_post
950    o Fixing OPTIONS files for use of exf:
951      - ALLOW_ECCO not needed
952      - ECCO_CPPOPTIONS.h should not be included from
953        EXF_OPTIONS.h/CAL_OPTIONS.h, but from CPP_OPTIONS.h
954        as has been the case in the past
955      - All cal/exf related options are currently set in
956        single header file. Should remain so until we
957        agree on a consistent new policy.
958    o Removed all CPP options for cal package.
959      cal has no more CPP options.
960    o modified STOREs in GAD_ADVECTION
961    o corrected key comp. for passkey
962    
963    checkpoint52b_post
964    o new version: "thsice" of thermodynamic sea-ice pkg:
965     - only 1 call from "forward_step"; conserve energy, fresh-water & salt.
966     - modify fluxes but do not change theta directly;
967     - light cleaning of bulk_force pkg (still needed with thsice).
968     - add forcing fields + data files in global_ocean.cs32x15/inp_thsice
969       + output_thsice.txt to test thsice & bulk_force pkgs.
970    o put back grid & coriolis monitor output.
971    checkpoint52b_pre
972    
973    o call "do_the_model_io" at the beginning (=> dump initial state)
974    o use rhoConstFresh to define convertEmP2rUnit (was done only in ocean-P)
975    o sort out interplay between tamc.h and PTRACERS_OPTIONS.h
976      (need info on NUMBER_OF_PTRACERS)
977    o missing PTRACERS headers in some routines
978    o default tamc.h in pkg/autodiff supposed to crash
979      to ensure proper customization
980    
981    checkpoint52a_post
982    o modifications to make FREEZE (_SURFACE) flux visible to pkg/kpp
983      - moved surfaceTendencyTice from pkg/seaice to main code
984      - subroutine FREEZE_SURFACE now limits only surface temperature
985        and is called in FORWARD_STEP (if allowFreezing=.TRUE.)
986        => new output.txt for global_ocean.cs32x15 & global_with_exf
987      - keep the old version of FREEZE for backward compatibility;
988        global_ocean.90x40x15 left unchanged using useOldFreezing=.TRUE.
989      - corresponding modifs for TAF directives
990    o added surface flux output variables to TIMEAVE_STATVARS
991    o time-averaged output for pkg/ptracers
992    o fix problem with ECCO-related divided adjoint
993      snapshot file was missing some ad-variables,
994      but no warning issued by TAF
995    
996    checkpoint52a_pre
997    o some bug fixes for #undef REAL4_IS_SLOW
998    
999    checkpoint52 = ecco_c52_e35
1000    o after testing adjoints of checkpoint51u_post
1001    
1002    checkpoint51u_post
1003    o this is the post-merge tag of the ecco-branch
1004      (needs another clean checkout and re-testing)
1005    o various natl_box_adjoint configs and results
1006      but no input fields
1007    o obcs adjoint not yet merged!
1008    o adding ECCO global 1x1 and 2x2 degree configs
1009    o updated/extended some store directives for seaice
1010    o pkg/ecco now containes ecco-specific part of cost function
1011    o top level routines the_main_loop, forward_step
1012      supersede those in model/src/
1013      previous input data.cost now in data.ecco
1014      (new namelist ecco_cost_nml)
1015    o in ctrl/ cleaned some cross-dependencies and updated CPP options
1016    
1017    checkpoint51t_post
1018    o this is the pre-merge tag of the ecco-branch
1019    
1020    checkpoint51s_post
1021    o cleanup: removed various obsolete #define-s
1022    o pkg/grdchk
1023      - renamed 'ph-grd 3' to 'grad-res'
1024      - merged from ecco-branch
1025        (remaining bug fixes for obcs gradient checks)
1026      - additional high-precision output for testreport
1027        (grep for 'precision_grdchk_result')
1028    
1029    checkpoint51r_post
1030    o cleaned up or removed CPP_OPTIONS.h files
1031    o updated results for some of the tests to reflect the new
1032      optfiles (-ieee: -O0 instead of -O3)
1033    
1034    checkpoint51q_post
1035    o cd_code:
1036      - moved cd_scheme.F -> cd_code_scheme.F
1037      - separate read_checkpoint from cd_code_ini_vars.F
1038      - separated cd_code part from write_checkpoint
1039      - updated AD_SOURCE, generated .flow
1040      - added CD_CODE_VARS.h to the_main_loop
1041      - Moving cd_code specific store dir.s to pkg/cd_code
1042    o ctrl package totally restructured
1043      - pack/unpack now optional and decoupled from
1044        xx_/adxx_ I/O
1045      - ctrl_pack/unpack cleaned
1046        (new routines ctrl_init_ctrlvar.F, pkg/ctrl/ctrl_init_wet.F)
1047      - confined inclusion of AD_CONFIG.h to where necessary.
1048    o genmake2: changed AD dependencies from SRCFILES to AD_FILES
1049    
1050    checkpoint51p_post
1051    o create initial cd_code package
1052      - WARNING: the initialization of fields within packages
1053        is broken because INI_FIELDS (where READ_CHECKPOINT is
1054        called) is called *before* PACKAGES_INIT_VARIABLES.
1055        This seems to be backwards since
1056        1) its important to initially zero the entire field including
1057           the "halo" region
1058        2) zeroing needs to be done *before* reading pickup info
1059           and the pickup call might or might not happen in any
1060           particular run
1061      - this needs an overhaul for R2
1062    o cleanup verification/*/code/GMREDI_OPTIONS.h
1063    o cleanup testreport
1064    
1065    checkpoint51o_post
1066    o bringing AD-related verif's up to date with genmake2
1067      - carbon/
1068      - global_ocean.90x40x15/
1069      - hs.94.1x64x5/
1070      - (front_relax/ )
1071    o (more) consistent directory structure for AD-related verif.'s
1072    o cleaning ALLOW_GRADIENT_CHECK -> ALLOW_GRDCHK
1073    o cleaning some ALLOW_TANGENTLINEAR_RUN -> ALLOW_AUTODIFF
1074    o bug fix in find_alpha.F for MDJWF:
1075      - modif. to alpha = 1/D*( dN/dT - rho*dD/Dt) to account for
1076        change rho -> rho-rhoConst
1077      - replace call find_rho to find_rhonum
1078    o initialisation of rFlx extended to full array (required by TAF)
1079      and shifted to thermodynamics
1080    o removed PTRACERS.h in ptracers routine
1081    o added surfacetendencyPtr to S/R parameter list pracers_forcing
1082    o Correcting initialisations for fVerU, fVerV.
1083    o helping TAF to recognize dependency on kUp for
1084      fVerU, fVerV
1085    o Replacing delZ by delR in pkg/ctrl/
1086    checkpoint51o_pre
1087    
1088    o undid all of cp51 pending some cleanups and discussion
1089    o added the [#include "AD_CONFIG.h"] statement to all files that need
1090       it for adjoint/tl #defines
1091     o re-worked the build logic in genmake2 to support AD_CONFIG.h
1092     o removed tools/genmake since it no longer works
1093    
1094    checkpoint51n_post
1095    o modifications to make FREEZE flux visible to pkg/kpp
1096      - moved surfaceTendencyTice from pkg/seaice to main code
1097      - FREEZE & EXTERNAL_FORCING_SURF moved to FORWARD_STEP
1098      - subroutine FREEZE now limits only surface temperature
1099        (this means new output.txt for global_ocean.90x40x15,
1100         global_ocean.cs32x15, and global_with_exf)
1101    o added surface flux output variables to TIMEAVE_STATVARS
1102    
1103    checkpoint51n_pre
1104    o added "#undef ALLOW_USE_MPI" support to eesupp/src/gather_2d.F
1105    o added [#include "AD_CONFIG.h"] to all files that use the following
1106      defines:
1107      - ALLOW_ADJOINT_RUN
1108      - ALLOW_TANGENTLINEAR_RUN
1109      - ALLOW_ECCO_OPTIMIZATION
1110    
1111    checkpoint51m_post
1112    o incorporating changes to get TAMC/TAF working in genmake2
1113      - added new TAMC/TAF targets to the Makefile
1114      - various cleanups related to package handling
1115      - these changes should have no impact on the forward model
1116    
1117    checkpoint51l_post
1118    o changes to pkg/cal and pkg/exf that allow and speed-up long integrations
1119     - faster algorithm for cal_addtime.F
1120     - higher precision arithmetic, where needed
1121     - pkg/exf *startdate variables changed from calendar date to
1122       model integration time
1123    
1124    checkpoint51l_pre
1125    o add salt flux to forcing fields (used when salty sea-ice forms or melts)
1126    o enable to apply restoring on S & T only in a latitude band.
1127    o update output (external_forcing_surf modif. change truncation errors)
1128       global_ocean.cs32x15, global_ocean_pressure, lab_sea, natl_box
1129    
1130    checkpoint51k_post
1131    o change default to: useNHMTerms=.FALSE.
1132     - new output.txt for atmos. exp (NHMTerms were wrong but now turned off):
1133       adjustment.128x64x1, aim.5l_Eq_Ch, aim.5l_LatLon, hs94.128x64x5, hs94.1x64x5
1134     - new output.txt for idealized oceanic exp (NHMTerms are now turned off):
1135        exp1, ideal_2D_oce
1136     - change data file of oceanic exp (leave the results unchanged for now)
1137       exp2, global_ocean[90x40x15,pressure,with_exf], lab_sea, natl_box
1138    o set gravitySign automatically according to the vertical coordinate used
1139      (and change sign: back to "logical" value: +1 when R increases downward)
1140    o added an include barrier to the default CPP_OPTIONS.h and
1141      removed the #include "PACKAGES_CONFIG.h" from it
1142    o fix a bug in mom_fluxform (from chk51j_post)
1143    
1144    checkpoint51j_post
1145    o Added some AD-related initialisations in mom_vecinv/ mom_fluxform/
1146    o adjusted some flow directives (dynamics, thermodynamics)
1147    o added cubed-sphere case to test cost function
1148    o heckpoint_lev?_directives.h now include
1149      pkg-specific directives, whenever those are enabled.
1150    o Moving pkg-specific flow directives to corresponding pkg
1151      Moving pkg-specific differentiation list to corresponding pkg
1152      Moving pkg-specific checkpoint-lev storing to corresponding pkg
1153      ---> conventions are
1154           - pkg_ad.flow
1155           - pkg_ad_diff.list
1156           - pkg_ad_check_lev?_dir.h
1157    
1158    checkpoint51i_post
1159    o merge of the branch-genmake2
1160      - knowingly breaks the older genmake
1161      - automatic generation of all ALLOW_${PKG_NAME} defines
1162      - new testreport supersedes older testscript
1163    o large number of package inclusion and header cleanups
1164    checkpoint51i_pre
1165    
1166    o new output for adjoin of global ocean vector invariant
1167    o fix for checkpoint of thermodynamic seaice and bulk_force
1168    o Steph gchem various cleanups
1169    
1170    checkpoint 51h_pre
1171    o fixed some single quotes
1172    o modify gchem pkg to be more versatile
1173    o modifications to clean up dic pkg
1174    o add pkg/cfc
1175    
1176    checkpoint51g_post
1177    o provide links for ARPACK and ADM*TLM
1178    o start removing verification/vero/
1179    o update AD-related stuff
1180      (in particular some IF-statements in model/src/ routines)
1181    o adding to verification/global_ocean.90x40x15/ adjoint of
1182      vector invariant setup
1183    
1184    checkpoint51f_post
1185    o update advect_xz/output.txt (left from chekpoint50f_pre, ini_vel modif)
1186    o Mods and bug fixes to pkg/cal, pkg/exf, etc., needed for computation
1187      of tracer Green's fucntions for ocean inversion project.
1188    
1189    checkpoint51f_pre
1190    o Added on-the-fly spatial interpolation capability
1191        "USE_EXF_INTERPOLATION" to pkg/exf.
1192      - This is a temporary Cartesian-grid hack until
1193        the super-duper ESMF coupler becomes available.
1194      - See verification/global_with_exf/README for usage example.
1195      - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
1196        flags and modified pkg/seaice accordingly.
1197    o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
1198        and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
1199        non-local transport term.
1200    
1201    checkpoint51e_post
1202    o pkg/mom_vecinv:
1203      - changes related to hFac: use S/R from aim.5l_cs/code (coriolis & vort.advec)
1204      - add time-ave diagnostic of vorticity advection.
1205    o add diagnostic (instantaneous) of Shapiro Filter effect for T,S & UV.
1206    o atmospheric geopotential: - include water vapor effect;
1207                                - use p^kappa in p* scaling.
1208    o land pkg: read initial state from files.
1209    o AIM : add stratospheric drag in the upper level
1210    
1211    checkpoint51d_post
1212    o change function ILNBLNK (=> last non-blank char.) to return zero
1213      (instead of the string length) when the string. char is empty
1214    o fix bug in dxV,dyU definition of cubed-sphere grid (ini_curvilinear_grid)
1215    o modif's to restore TAMC compatibility
1216      - avoid "_d" constructs in PARAMETER declarations
1217      - avoid interrupting lines by comment lines
1218    o Use cluster local disks for purely local I/O
1219      vs. globally visible disks needed for ctrl stuff
1220      (merged from ecco-branch)
1221      - new active_file_loc... and mdsio_..._loc routines
1222      - affected packages: autodiff, ctrl, grdchk, mdsio
1223    
1224    checkpoint51c_post
1225    o introducing integer flag debugLevel
1226      - debLevZero: suppress all output
1227      - debLevA: standard
1228      - debLevB: equivalent to current debugMode=.TRUE.
1229    o introducing pathname variable mdsioLocalDir for mdsio
1230      that can be specified at runtime
1231      (relevant for cluster I/O to local disk)
1232    `
1233    >>>checkpoint51b_post
1234    adjoint of ptracers
1235    o disentangled ALLOW_PTRACERS using new ALLOW_GCHEM
1236    o extended state in checkpoint_lev?, etc.
1237    o alternative ctrl/cost with tr1 or ptracer
1238    o new comlev1_bibj_ptracers
1239    o new ptracers.flow
1240    o made ptracers_forcing same as external_forcing_s
1241    o added verification for adjoint with ptracers
1242      - adm. grdchk fail so far
1243      - tlm. grdchk OK
1244      - checked tapelev/comlev recomputations: OK
1245    <<<checkpoint51b_pre
1246    
1247    checkpoint51a_post
1248    o added code for biogeochemistry package
1249      - new pkgs: dic, gchem
1250      - new subroutine in ptracers
1251    o modify code for biogeo packages
1252      - in model/src and pkg/ptracers
1253    
1254    checkpoint51
1255    o merged improved packages from ecco-branch (ecco_c51_e34) to MAIN
1256      - autodiff, ctrl, exf, grdchk, seaice
1257      kept separate packages
1258      - cost, ecco, obcs
1259    o updating verification/internal_wave, verification/lab_sea
1260      (all verif's pass on faulks.lcs.mit.edu RH7.3, g77)
1261    
1262    checkpoint50i_post
1263    o Preparing next differentiable checkpoint and sync
1264      of MAIN vs. ecco-branch
1265      - 1st step: this one is differentiable
1266      - 2nd step: next(! not this) checkpoint will have updated packages
1267                  from ecco-branch)
1268    
1269    checkpoint50h_post
1270    o new package "land": provide surface BC for AIM.
1271    o pkg/ptracers: apply exchange to all tracers after reading a pickup.
1272    o AIM: use true log-P extrapolation for near surface temp (= as in
1273        F.Molteni paper) ; update aim.5l_cs output.
1274    o New variable in PARM03 for more flexible pickups
1275    o somewhat cleaned package initialisation sequence for
1276      ctrl/ cost/ ecco/ in packages_... routines
1277    
1278    checkpoint50g_post
1279    o merged with release1_p17 (pkg/seaice and verification/lab_sea)
1280      - added SEAICE_MULTILEVEL for 8-category sea-ice thermodynamics
1281      - LSR sea-ice dynamic solver moved to SouthWest B-grid location and
1282        made the default because of faster convergence than ADI
1283    
1284    checkpoint50f_post
1285    o exf totally restructured
1286      - replaced all exf_set_ routines by one generic exf_set_gen.F
1287        and made sure it's still differentiable
1288      - split exf_getffields.F into new exf_bulkformulae.F
1289      - exf_inscal_/exf_outscal_ suffixes consistent with field names
1290      - updated adjoint/makefile and relevant verif. accordingly
1291    
1292    checkpoint50f_pre
1293     o AIM: near surface temp evaluated from Pot.Temp: fixed for Part Cell ;
1294          + change Evap over land. (update aim.5l_cs output)
1295     o added missing .cvsignores and made uniform across expts
1296     o changed configuration of tidal_basin_2d expt
1297     o added pkg/debug functions for tracing code in fatal crashes
1298     o tidied pkg/monitor to use MONITOR_OPTIONS.h
1299     o new fn in pkg/monitor to stop model if solution grows too big
1300     o removed lots of single quotes from comments
1301    
1302    checkpoint50e_post
1303    o make KPP work with PTRACERS
1304     - fix gad_calc_rhs to call new routine kpp_transport_ptr, which is
1305       nearly a copy of kpp_transport_s
1306     - there is no analogue to SurfaceTendencyS, so I have to use
1307       gPtr(of the surface layer) instead
1308    o add a new platform SunFire+mpi (SunFire 15000) to genmake
1309    checkpoint50e_pre
1310    
1311    checkpoint50d_post
1312    o change kpp output from multiple-record state files to single-record state
1313      files analogous to write_state.F
1314    o reduce the output frequency of cg3d-related stuff to the monitor frequency,
1315      analogous to the cg2d-related output.
1316    o fix small problem with in ptracers_write_checkpoint.F: len(suff)=512,
1317      so that writing to internal file fn (with length 512) fails.
1318    checkpoint50d_pre
1319    
1320    checkpoint50c_post
1321    o fix problem in ini_procs.F when using MPI (was there since checkpoint48f)
1322    o add monitor diagnostic of vorticity (mon_vort3.F) and potential energy.
1323    o add time-average diagnostic of U*V and vertical diffusive flux for theta.
1324    o bug fixed in convective adjustment diagnostic (multi-tile set-up).
1325    o 4th Order Adv scheme: return to previous (c40pre7) masking near boundaries.
1326    
1327    checkpoint50c_pre
1328    Merging from release1_p13:
1329    o bug fix for pkg/seaice dynamic solver
1330    o Added SEAICE_initialHEFF to pkg/seaice
1331    
1332    checkpoint50b_post
1333    o store u*,v* in gU,V instead of in guNm1,gvNm1
1334    o in order to put the momForcing out of the Adams-Bashforth:
1335      move forcing & CD-scheme calls from mom_fluxform & mom_vecinv
1336      to timestep.F
1337    o new flag "useCDscheme" (default=F); replace guCD,gvCD by local arrays
1338    o re-generate output for highly sensitive test-exp:
1339       global_ocean_pressure, ideal_2D_oce, lab_sea, natl_box
1340    
1341    checkpoint50b_pre
1342    o restore the use of momAdvection & useCoriolis flags (mom_vecinv)
1343    o corrected CPP option mismatch in exf_Bulk... functions for case
1344      #define ALLOW_ATM_WIND && #undef ALLOW_ATM_TEMP
1345    
1346    checkpoint50a_post
1347    o Bug fix for merging between c50 and KPP.
1348      ikey was passed from thermodynamics to kpp_calc via
1349      common block rather than being recomputed in kpp_calc,
1350      in contradiction with new key itdkey.
1351      New key ikppkey created, and tamc.h headers updated.
1352    
1353    checkpoint50
1354    - 2nd step of merge with ecco-branch:
1355      merge changes in ecco-branch back into main trunk
1356    - bug fix in find_alpha
1357    - more storing in gmredi_calc_tensor.F, kpp_routines.F
1358    - avoid iterative loop in ini_pressure for ALLOW_AUTODIFF_TAMC
1359    - merged some sliced AD support routines
1360    
1361    checkpoint49
1362    merged from ecco-branch:
1363    o exf:
1364      - Enable initialisation of forcing fields to constant
1365        (runtime) values.
1366      - in exf_getffields.F
1367        Reduce i-/j-loop to interior domain, discarding overlaps.
1368        That also fixes wrong TAF-key computations for key_1, key_2
1369        with bulf formulae.
1370      - exf_init.F modify #ifdef for exf_init_evap
1371      - exf_getffieldrec.F, ctrl_getrec.F
1372        The following INT-usages are not safe:
1373          fldsecs  = int(fldsecs/fldperiod)*fldperiod
1374          fldcount = int(fldsecs/fldperiod) + 1
1375        and were modified.
1376    o autodiff: checkpoint_lev...
1377      - updated storing for bulk formulae (some arrays were missing)
1378      - added state for seaice package
1379      - synchronized with main branch
1380    o DIVA:
1381      Modif.s in
1382      - the_main_loop.F
1383      - the_model_main.F
1384      and added cost_final_restore.F cost_final_store.F
1385      o With these changes, it is possible to fully separate
1386        the first forward run to compute the cost function (mdthe_main_loop)
1387        and adjoint runs over individual DIVA intervals (adthe_main_loop)
1388        into separate model executions.
1389        This enables better tuning of DIVA to given queue sizes.
1390      o Loss of cost function value in consecutive DIVA runs is
1391        fixed by storing to 'costfinal' file.
1392      o Appropriate call of ctrl_unpack/_pack,grdchk_main at
1393        beginning/end of adjoint integration is accounted for.
1394      The current changes apply to TAF-1.4.26.
1395      TAF has one remaining bug, requiring one manual change
1396      (see MITgcm manual).
1397    o cal: synchronized between MAIN and ecco-branch
1398    
1399    checkpoint48i_post
1400    o Changes to restore differentiability of code w.r.t. previous tag
1401      (mostly adding new routines to make list and replacing
1402      pressure by totPhiHyd).
1403    o Updated and merged grdchk package
1404      - has both ADM and TLM checks
1405      - works for single- and multi-proc.
1406      - output cleaned
1407      - worked successfully for parallel DIVA
1408    o genmake:
1409      - Adding -platform=SP4
1410      - Modif. for DEC Alpha (many don't have makedepend; use mkdep instead).
1411    o Modif. for DIVA:
1412      ctrl_unpack should not be called in intermediate DIVA interval.
1413      (similar thing would apply for active files such as
1414      tbar, sbar, psbar, which should not be reinitialised;
1415      only relevant for ecco-branch)
1416    
1417    checkpoint48h_post
1418    o improve "ini_p_ground" when using finite difference form for calc_phi_hyd
1419    o Added net flux to downward flux conversion to pkg/exf/exf_getffields.F
1420    o Added SEAICE_initialHEFF to pkg/seaice
1421    o ecco_the_model_main.F: SEAICE_WRITE_PICKUP must precede WRITE_CHECKPOINT
1422    
1423    checkpoint48g_post
1424    --- EOS:
1425    o compute locally the pressure for use in EOS: UNESCO, JMD95P, MDJWF
1426      store total Potential in totPhyHyd for diagnostics & EOS.
1427    o fix restart and overlap Pb when using Z-coord and EOS funct. of P
1428    --- Pressure/geopotential gradient:
1429    o use Ro_surf & R_low instead of hFac in cal_phi_hyd:
1430    o NLFS + p-coord.: eta*Alpha' is not longer lagging 1.time-step behind
1431      ( changes results of global_ocean_pressure )
1432    o NLFS + z-coord.: add eta*Rho' contribution.
1433    o accurate phiHyd when using interface-W at the middle between 2 centers
1434     ( changes results of ideal_2D_oce )
1435    o includes r* 2nd term in potential gradient.
1436    
1437    checkpoint48f_post
1438    Merging from release1_p12:
1439    o Modifications for using pkg/exf with pkg/seaice
1440      - improved description of the various forcing configurations
1441      - added basic radiation bulk formulae to pkg/exf
1442      - units/sign fix for evap computation in exf_getffields.F
1443      - updated verification/global_with_exf/results/output.txt
1444    o Added pkg/sbo for computing IERS Special Bureau for the Oceans
1445      (SBO) core products, including oceanic mass, center-of-mass,
1446      angular, and bottom pressure (see pkg/sbo/README.sbo).
1447    o Lower bound for viscosity/diffusivity in pkg/kpp/kpp_routines.F
1448      to avoid negative values in shallow regions.
1449      - updated verification/natl_box/results/output.txt
1450      - updated verification/lab_sea/results/output.txt
1451    o MPI gather, scatter: eesupp/src/gather_2d.F and scatter_2d.F
1452    o Added useSingleCpuIO option (see PARAMS.h).
1453    o Updated useSingleCpuIO option in mdsio_writefield.F to
1454      work with multi-field files, e.g., for single-file pickup.
1455    o pkg/seaice:
1456      - bug fix in growth.F: QNET for no shortwave case
1457      - added HeffFile for specifying initial sea-ice thickness
1458      - changed SEAICE_EXTERNAL_FLUXES wind stress implementation
1459    o Added missing /* */ to CPP comments in pkg/seaice, pkg/exf,
1460      kpp_transport_t.F, forward_step.F, and the_main_loop.F
1461    o pkg/seaice:
1462      - adjoint-friendly modifications
1463      - added a SEAICE_WRITE_PICKUP at end of the_model_main.F
1464    
1465    checkpoint48e_post
1466    o New S/R for diagnostic of bottom pressure (phi0surf was missing in c48d_post)
1467    o dynamics: change definition of computational domain & adapt mom_fluxform
1468      accordingly ; when viscA4=0, allows to run the dynamics with Olx=Oly=2.
1469    o following exp works with Olx=Oly=2 (and pass through checkbounds option):
1470        adjust_nlfs.cs-32x32x1 adjustment.128x64x1 adjustment.cs-32x32x1
1471        exp0 exp1 exp2 exp4 exp5 hs94.cs-32x32x5 hs94.128x64x5 hs94.1x64x5
1472        global_ocean.90x40x15 global_with_exf global_ocean_pressure
1473        inverted_barometer solid-body.cs-32x32x1
1474      (high order AdvScheme and/or multiDimAd works with Olx=Oly=2 ? not sure)
1475    
1476    checkpoint48d_post
1477    o in preparation for r*:
1478     a) use pre-computed gradient of hydrostatic potential:
1479        changes in timestep.F & mom_cdscheme.F affects results of ideal_2D_oce
1480     b) move phi0surf from calc_phi_hyd to calc_grad_phi_hyd:
1481        => affects results of glob_oce_pressure (different truncation error)  
1482      update output.txt of ideal_2D_oce & global_ocean_pressure
1483    
1484    checkpoint48d_pre
1485    o in preparation for r*:
1486      new S/R (calc_grad_phi_hyd.F) to compute Hydrostatic potential gradient.
1487      pass the 2 comp. of the grad. as arguments to momentum S/R.
1488      but for the moment, only used if it does not change the results.
1489    o add finite volume form of calc_phi_hyd for buoyancyRelation OCEANIC & OCEANICP
1490    
1491    checkpoint48c_post
1492    Modifications in treatment of initial flux forcing controls
1493    to avoid extra storing of flux fields.
1494    
1495    checkpoint48c_pre
1496    o Added tidal_basin_2d experiment (currently 1D!)
1497    o can use r* Coordinate with OBC (but Orlanski Rad. BC not yet implemented)
1498    
1499    checkpoint48b_post
1500    o r* coordinate added in #ifdef NONLIN_FRSURF block.
1501     (modification to pressure gradient not yet implemented)
1502    o mom_fluxform: new S/R mom_calc_rtrans.F computes vertical transports
1503      (for U & V) that are used for vertical advection of momentum.
1504    
1505    checkpoint48a_post
1506    o In preparation for r*, use temp. array to compute vertical transport
1507       in flux-form momentum pkg. => change results of few test-exp.
1508      Update output of: exp4, exp5, front_relax, global_ocean_pressure,
1509                        lab_sea, natl_box & plume_on_slope
1510    
1511    checkpoint48
1512    o fix small bug that was causing lot of warning (TIMER_STOP 'UPDATE_CG2D')
1513    
1514    checkpoint47j_post
1515    o add new exp. (ideal_2D_oce) to test "exotic" parameters and options.
1516    o moved adexch from forward_step to addummy_in_stepping
1517    o added exch in ctrl_map_...
1518    o aveFreq.=0. at end of cost_final to avoid overwrite in
1519      reverse checkpointing loop
1520    o Yet more changes in gmredi:
1521      * adgmredi_calc_tensor
1522        avoiding all recomputation of gmredi_slope_limit
1523      * adgmredi_x/y/rtransport
1524        added flag for excessive storing to avoid recomp. of
1525        u/v/rtans, dTdx/y/z
1526        -> this is not really necessary and very memory-consuming
1527      * adgmredi_slope_psi:
1528        consistency with gmredi_slope_limit in treatment of GM_slopeSqCutoff
1529      * gmredi_slope_limit
1530        re-activated full calculation of taperfct for case 'ac02'
1531    o updating verification/ adjoints of carbon, global_ocean.90x40x15
1532    
1533    checkpoint47i_post
1534    o GM_EXCLUDE_() replace GM_TAPER_(): by default, all the code is compiled.
1535    o add GM_Small_Number & GM_slopeSqCutoff as run-time parameters (data.gmredi)
1536      default values = 1.D-12 & 1.D+48 (=> give same results as checkpoint47f_post)
1537    o cg2dTargetResWunit: define tolerance using deltaTmom (and not deltaTfreesurf)
1538    o gmredi: fix few bugs.
1539    
1540    checkpoint47h_post (duplicate tag for PH's c48 tag, in order to move c48)
1541    This will be a good checkpoint to plug into the ecco-branch.
1542    o few modif.'s to get latest version adjointed
1543      (mainly kick out code in ini_linear_phisurf)
1544    o modif's to run adjoint with exactConserv
1545    o case GM_BOLUS_ADVEC should be cleaned
1546      S/R gmredi_slope_psi should be cleaned
1547    o verification/carbon now has exactConserv=.TRUE.
1548    
1549    checkpoint47g_post
1550    o time-average AIM output: becomes independent from statvars time-average
1551      (can be used with #undef ALLOW_TIMEAVE) ; add new variables (e.g., RH)
1552    o After TAF bug fix:
1553      Tested adjoint of gmredi package.
1554      Tests were done with checkpoint47 rather than with latest
1555      checkpoint47f_post since the latter is broken for the adjoint
1556      verification/carbon/ contains both ADM and TLM gradient checks.
1557    Here they are, before they get changed/lost/stolen.
1558    Mostly modif.'s to fix numerical sensitivities.
1559    Gradient checks OK for
1560    - GM_taper_scheme:
1561      * clipping
1562      * ac02
1563      * linear
1564      * glw91
1565      * dm95
1566      * ldd97
1567    - GMREDI_OPTIONS:
1568      * GM_VISBECK_VARIABLE_K
1569      * GM_NON_UNITY_DIAGONAL
1570      * GM_EXTRA_DIAGONAL
1571      * GM_BOLUS_ADVEC
1572    in conjunction with data.gmredi parameters to be checked in
1573    in a few minutes under verification/carbon/code/
1574    
1575    checkpoint47f_post
1576    Merging from release1_p10:
1577    o modifications for using pkg/exf with pkg/seaice
1578      - pkg/seaice CPP options SEAICE_EXTERNAL_FORCING
1579        and SEAICE_EXTERNAL_FLUXES
1580      - pkg/exf CPP options EXF_READ_EVAP and
1581        EXF_NO_BULK_COMPUTATIONS
1582      - usage examples are Experiments 8 and 9 in
1583        verification/lab_sea/README
1584      - verification/lab_sea default experiment now uses
1585        pkg/gmredi, pkg/kpp, pkg/seaice, and pkg/exf
1586    
1587    checkpoint47e_post
1588    o created a tag prior to creating a branch
1589    
1590    checkpoint47d_post
1591    o fixed bug in the oceanic pressure coordinates code: vertical viscosity
1592      at the bottom boundary had an erroneous half slip boundary condition
1593    o added bottom drag and no slip boundary condition capabilities to
1594      oceanic pressure coordinates code
1595    o added new verification experiment global_ocean_pressure, this experiment is
1596      also described in the tutorial section of the manual
1597    checkpoint47d_pre
1598    
1599    checkpoint47c_post
1600    o Added a verification experiment for a global cubed-sphere ocean run
1601      -  verification/global_ocean.cubed32x32x30
1602      -  uses pkg/therm_seaice and pkg/bulk_forcing
1603    
1604    o allow to run AIM physics with SPEEDY input files (from Franco Molteni)
1605    o allow a more accurate definition of Ro_Surf (selectFindRoSurf=1)
1606      when using P-coordinate; only implemented for atmospheric config.
1607    o OCEANICP & realFreshWater: include P-E direct effect on wVel ;
1608      NOTES: requires option NONLIN_FRSURF to be "#define".
1609    o update advect_xz/results/output.txt (left from checkpoint44g_post)
1610    
1611    checkpoint47b_post
1612    Merging from release1_p9:
1613    o pkg/seaice
1614      - removed GOTO's and added taf directives
1615      - double precision constants to reduce the g77 (Linux)
1616        to F77 (SGI) differences reported in release1_p8
1617    o tools/genmake
1618      - added SGI options
1619    o verification/testscript
1620      - updated to that of checkpoint47a_post
1621    o verification/global_ocean.90x40x15/input/eedata
1622      - modified for SGI f77 compatibility
1623    o verification/lab_sea
1624      - added description of sea-ice model
1625      - added missing matlab routines
1626      - added test of thermodynamics parallelization
1627    
1628    checkpoint47a_post
1629    o new pkg: aim_v23
1630     = F. Molteni atmos.physics (SPEEDY, ver23) adapted to MITgcm.
1631       for now, keep the same surface forcing as before.
1632     - Part-Cell implemented into AIM; check that Heat & Water are conserved
1633     - aim.5l_cs: use new aim pkg (run 10yr & get better results than before)
1634     - aim.5l_LatLon & aim.5l_Equatorial_Channel are still using old aim pkg
1635    o add diagnostic of surface correction term in monitor output
1636    
1637    o bulk_force and therm_seaice
1638    - Two packages:  bulk_force (Bulk forcing)
1639      and therm_seaice (thermodynamic_seaice) - adopted from LANL CICE.v2.0.2
1640    - Earlier integration from Stephaine Dutkiewicz
1641      and Patrick Heimbach.
1642    - Two ifdef statements for compile time,
1643       ALLOW_THERM_SEAICE and ALLOW_BULK_FORCE
1644    
1645    checkpoint47
1646    differentiable version of checkpoint46n_post
1647    o bug fix in quasihydrostaticterms
1648    o * "clean" adjoint code (in terms of extensive recomputations)
1649        can now be obtained for all GMREDI options (i.e. for
1650        - GM_VISBECK_VARIABLE_K
1651        - GM_NON_UNITY_DIAGONAL
1652        - GM_EXTRA_DIAGONAL
1653        - GM_BOLUS_ADVEC )
1654      * However, wrong gradient check problem remains unsolved.
1655      * New CPP options have been introduced for different
1656        tapering schemes
1657    o external_fields_load now part of differentiation list
1658    o pressure needs multiple storing;
1659      would be nice to have store_pressure at beginning or
1660      end of forward_step, e.g. by having phiHyd global (5-dim.)
1661      (NB: pressure is needed for certain cases in find_rho,
1662      which is also invoked through convective_adjustment).
1663    o recomputations in find_rho for cases
1664     'JMD95'/'UNESCO' or 'MDJWF' are OK.
1665    o #define ATMOSPHERIC_LOADING should be differentiable
1666    o ini_forcing shifted to begining of initialise_varia
1667    o Incorporating QNVS line search routines into MITgcm
1668      (this is separate code, and therefore not under pkg)
1669      lsopt/, optim/
1670    o Updated verification/carbon/
1671      - #define GM_VISBECK_VARIABLE_K
1672      - GM_taper_scheme    = 'ldd97'    
1673    
1674    checkpoint46n_post
1675    Merging from release1_p8:
1676    o verification/natl_box:
1677      updating new external_fields_load routine
1678    o New package: pkg/seaice
1679      Sea ice model by D. Menemenlis (JPL) and Jinlun Zhang (Seattle).
1680      The sea-ice code is based on Hibler (1979-1980).
1681      Two sea-ice dynamic solvers, ADI and LSR, are included.
1682      In addition to computing prognostic sea-ice variables and diagnosing
1683      the forcing/external data fields that drive the ocean model,
1684      SEAICE_MODEL also sets theta to the freezing point under sea-ice.
1685      The implied surface heat flux is then stored in variable
1686      surfaceTendencyTice, which is needed by KPP package (kpp_calc.F and
1687      kpp_transport_t.F) to diagnose surface buoyancy fluxes and for the
1688      non-local transport term.  Because this call precedes model
1689      thermodynamics, temperature under sea-ice may not be "exactly" at
1690      the freezing point by the time theta is dumped or time-averaged.
1691      N.B.: fairly large differences in accuracy occur across
1692            different platforms/compilers; comparison between
1693            g77 (Linux) and F77 (SGI Origin 2000/MIPSpro)
1694            generated output gives:
1695       T           S           U           V
1696      C D M    c        m  s        m  s        m  s        m  s
1697      n p a R  g  m  m  e  .  m  m  e  .  m  m  e  .  m  m  e  .
1698      f n k u  2  i  a  a  d  i  a  a  d  i  a  a  d  i  a  a  d
1699      g d e n  d  n  x  n  .  n  x  n  .  n  x  n  .  n  x  n  .
1700    
1701      Y Y Y Y  5  5  7  7  7  8 10  9  6  6  6  6  7  5  7  5  7 FAIL  lab_sea
1702    o GAD:
1703      - generated new common blocks to account for call of
1704        same gad routines with differing traceridentities
1705        (needed to modify tracerIdentity indices in GAD.h)
1706      - generated separate common blocks for case useCubedSphereExchange
1707        (Department of Futurology)
1708      - parameter lists to gmredi_?transport: added tracerIdentity
1709      - added new key indices to tamc.h
1710    o external_fields_load:
1711      - added this routine to TAF list
1712      - needed to make some common blocks global and additional storing
1713        along the same lines as exf package (checkpoint_lev?_directives.h)
1714    o exf:
1715      updated external forcing package
1716      - bug fixes carried over from ecco-branch
1717        (missing OBCS_OPTIONS.h in two routines)
1718      - enable easy to use "no forcing".
1719      - added exf I/O for atmospheric loading
1720      - added exf I/O for runoff data
1721      - transfered scaling between exf <-> MITgcm to exf namelist
1722    o Adding new verification experiment global_with_exf.
1723      This verification experiment is almost identical to the
1724      global_ocean.90x40x15 experiment, except that it uses
1725      the exf (and cal) package instead of the
1726      external_fields_load routine (cf README file).
1727    
1728    checkpoint46m_post
1729    o modified testscript to return -- when there are no lines of "%MON" output
1730    o added new flag "quasiHydrostatic" for QH mode
1731      and new routine quasihydrostaticterms()
1732    o added 2*Omega*Cos(phi)*W to u equations (non-hydrostatic Coriolis term)
1733      New routine: mom_u_coriolis_nh()
1734    o fixed sign of non-hydrostatic metric terms in u and v equations.
1735      Depend on correct sign of gravitySign.
1736    o added work.pc* to .cvsignore in aim directories using ifc
1737    o introduced flag for controllin non-hydrostatic metric terms
1738    o removed gravitySign from PARM04
1739    o switched to g77/ifc from pgf77 in aim experiments
1740    
1741    checkpoint46l_post
1742    o made convective adjustment work with pressure coordinates:
1743     - changed the direction of k-loop in convective_adjustment.F for the
1744       case of pressure coordinates (OCEANICP,ATMOSPHERIC buoyancyRelation)
1745     - adjusted the reference pressure k-index in convective_adjustment.F
1746     - adjusted the convection condition in convect.F (in analogy to
1747       calc_ivdc.F)
1748     - convective_adjustment no longer computes anything on the halos
1749     - removed the warnings about negative salinity from find_rho.F and
1750       find_alpha.F; instead the new routine look_for_neg_salinity, called
1751       at the beginning of find_rho, find_alpha, and find_beta, does a
1752       check of the entire slice, if CPP-option
1753       CHECK_SALINITY_FOR_NEGATIVE_VALUES is defined
1754    checkpoint46l_pre
1755    
1756    checkpoint46k_post
1757    o fixed the verification/global_ocean.90x40x15 experiment:
1758     - new bathymetry (the world according to A., JMC, and M.)
1759     - new initial fields and forcing fields (*.bin files)
1760     - new POLY3.COEFFS (for the next release one should switch to a full
1761       equation of state: JMD95P or MDJWF)
1762     - fixed several errors and redundancies in the data file
1763     - experiment uses looped cells
1764     - added matlab directory with diagnostic scripts for plotting of output
1765    
1766    o S/R aim_initialise.F replace S/R aim_init from file aim_do_inphys.F:
1767     - read AIM physics parameters from a file (data.aimphys)
1768     - set defaults values = F.Molteni paper (Clim.Dyn., 2002)
1769    
1770    checkpoint46j_post
1771    o split calc_exact_eta in 2 S/R : integr_continuity & update_etaH
1772    o move wVel computation at the end of the time step, in S/R integr_continuity
1773    o create specific S/R to exchange T,S before DYNAMICS (for stagger time step)
1774    o update timeave pkg for wVel diagnostic.
1775    checkpoint46j_pre
1776    
1777    checkpoint46i_post
1778    o Clean up AIM package (and keep the results unchanged):
1779      include CPP_OPTION and use IMPLICT NONE in all routines ;
1780      declare all the variables _RL ; use _d 0 for all numerical constants.
1781      use ifdef ALLOW_AIM everywhere. And now AIM can be used with g77 !
1782    
1783    checkpoint46h_post
1784    o cleaned up the use of rhoNil and rhoConst.
1785      - rhoNil should only appear in the LINEAR equation of state, everywhere
1786        else rhoNil is replaced by rhoConst, e.g. find_rho computes rho-rhoConst
1787        and the dynamical equations are all divided by rhoConst
1788    o introduced new parameter rhoConstFresh, a reference density of fresh
1789      water, to remove the fresh water flux's dependence on rhoNil. The default
1790      value is 999.8 kg/m^3
1791    o cleanup up external_forcing.F and external_forcing_surf.F
1792      - can now be used by both OCEANIC and OCEANICP
1793    checkpoint46h_pre
1794    
1795     Added code to convert surface volume flux (fresh water) into
1796     a mass flux when using P coordinates in the ocean (OCEANICP).
1797     Note: It assumes you have set rho0=rhoConst=density of fresh water.
1798    
1799    checkpoint46g_post
1800    o Include a new diagnostic variable phiHydLow for the ocean model
1801      - in z-coordinates, it is the bottom pressure anomaly
1802      - in p-coordinates, it is the sea surface elevation
1803      - in both cases, these variable have global drift, reflecting the mass
1804        drift in z-coordinates and the volume drift in p-coordinates
1805      - included time averaging for phiHydLow, be aware of the drift!
1806    o depth-dependent computation of Bo_surf for pressure coordinates
1807      in the ocean (buoyancyRelation='OCEANICP')
1808      - requires a new routine (FIND_RHO_SCALAR) to compute density with only
1809        Theta, Salinity, and Pressure in the parameter list. This routine is
1810        presently contained in find_rho.F. This routine does not give the
1811        correct density for 'POLY3', which would be a z-dependent reference
1812        density.
1813    o cleaned up find_rho
1814      - removed obsolete 'eqn' from the parameter list.
1815    o added two new verification experiments: gop and goz
1816      (4x4 degree global ocean, 15 layers in pressure and height coordinates)
1817    checkpoint46g_pre
1818    
1819    checkpoint46f_post
1820    o Enable tangent linear (forward mode) gradient checks:
1821      - extended active file handling to g_... files
1822      - added TANGENT_SIMULATION to theSimulationMode
1823      - extended grdchk package accordingly
1824    o added tangent linear setup in verification/carbon/code_ftl
1825    o added adjoint setup in verification/front_relax/code_ad
1826    
1827    checkpoint46e_post
1828    o Added new equation of state -> MDJWF
1829      - EOS of McDougall et al., 2002, JAOT, submitted
1830      - caveat: the equation of state is only valid for a smaller (more
1831        realistic?) range of values than JMD95P/Z and UNESCO
1832      - added masks to the calculation of pressure in store_pressure
1833      - added more check values for density in check_eos (ini_eos.F), some of
1834        the old check values are out of the range of the MDJWF-eos, so don't
1835        expect perfect matches for those
1836    checkpoint46e_pre
1837    
1838    checkpoint46d_post
1839    o fixed store_pressure to work with both buoyancy relation = 'OCEANIC' and
1840      'OCEANICP', also initialised field pressure correctly in ini_eos in the
1841      case of pressure coordinates. eosType='JMD95Z' in
1842      combination with buoyancyRelation='OCEANICP' now causes an error.
1843    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1844      in find_alpha/beta.
1845    checkpoint46d_pre
1846    
1847    o Changed p = pressure(i,j,k,bi,bj)  to  p = pressure(i,j,kRef,bi,bj)
1848      so that JMD95Z and JMD95P give approptiate static stability in find_rho.
1849    
1850    checkpoint46c_post
1851    o Changes necessary for ocean in p-coordinates
1852     -  Added new buoyancy relation = 'OCEANICP'
1853     -  Added new parameters = gravitySign (this used to be contained inside
1854        the factor dRdZ which I added when we first switched to R coordinates).
1855     X GM/Redi is not compatible (yet)
1856     X bottom drag and no-slip need to be debugged.
1857    checkpoint46c_pre
1858    
1859    checkpoint46b_post
1860    o Added new equation of state -> JMD95Z and JMD95P
1861      - EOS of Jackett and McDougall, 1995, JAOT
1862      - moved all EOS parameters into EOS.h
1863      - new routines ini_eos.F, store_pressure.F
1864    o Added UNESCO EOS, but not recommended because it requires
1865      in-situ temperature (see JMD95)
1866    o Modified formatting for knudsen2.f in utils/knudsen2 and added
1867      unesco.f to be used with POLY3
1868    checkpoint46b_pre
1869    
1870    checkpoint46a_post
1871    o Added (atmospheric) pressure loading
1872      - new field in FFIELDS.h, etc...
1873      - new cpp flag ATMOSPHERIC_LOADING
1874    o Changed hFacC to _hFacC in calc_phi_hyd.F
1875    o Added SHORTWAVE_HEATING to some files for consistency
1876    checkpoint46a_pre
1877    
1878    checkpoint46
1879    further merges from release1_p5
1880    o new ctrl package
1881      - adopted from ECCO environment to enable optimization
1882      - added Eliassen Palm fluxes to controls
1883    o added Eliassen Palm flux controls to gradient check package
1884    o cost package
1885      - Compatible with new ctrl package
1886      - added Eliassen Palm cost hooks
1887      - modif's of existing cost functions
1888    o Adjoint-related bug fixes in kpp:
1889      - kpp_calc: sore of kpphbl avoids recomputation/call to S/R kppmix
1890      - kpp_routines: store of Rib avoids partial recomputation bug of TAF.
1891    o autodiff package
1892      - flow directives:
1893        + new for S/R do_the_model_io
1894        + enhanced for S/R checkpoint
1895        + new gmredi.flow
1896      - Introduced CPP option ALLOW_AUTODIFF_MONITOR to
1897        disable adcommon.h/g_common.h by default.
1898      - fixed problem for adjoint of global_max
1899    o modified verification/carbon/
1900    o New setup for adjoint of global_ocean
1901    o added hooks for Eliassen Palm fluxes (dynamics.F, ini_fields.F)
1902    o cleaned TAF keys iikey, idkey (dynamics.F, thermodynamics.F)
1903    o incorporated hooks for sponge layer code (external_forcing.F)
1904    
1905    checkpoint45d_post
1906    o import 2 fixes from release1_p5 (CG2D.h & packages_readparms.F)
1907    o use recip_dx*,recip_dy* instead of /dx*,/dy* in orlanski_E,W,N,S
1908      (affects plume_on_slope "cg2d" output)
1909    o add new parameter deltaTfreesurf for free-surface time stepping
1910    o exchange gT,gS when using staggerTimeStep & GM & Oly<4
1911    o NONLIN_FRSURF: rescale gNm1 to get a better conservation with A-B
1912    o change phiMin in exp1 (to agree with documentation)
1913    o add new flags:
1914     - T,S forcing inside/outside Adams-Bashforth
1915     - turn off temp,salt advection and/or forcing
1916     - for each tracer, define internal flag for multiDimAdvection & A-B
1917    o monitor: change definition of KE to check conservation of Energy
1918    
1919    checkpoint45c_post
1920    o Removed f90 comments ("!")
1921    o Modified initialisations to enable exf package for MITgcm
1922      (without invoking ECCO_PACKAGE).
1923    o modifications to gradient check package (Martin Losch)
1924      - enable centered differences
1925      - modified format of standard output
1926    
1927    checkpoint45b_post
1928    o cleaned exchange calls in cg2d
1929    o Included CPP option ALLOW_AUTODIFF_MONITOR in forward_step
1930    o included CPP option SINGLE_LAYER_MODE in thermodynamics
1931      to configure barotropic setup (Martin Losch)
1932    o moved some initialisations within bi,bj loop in dynamics
1933      (TAF flow dependency)
1934    o in initialise_varia, moved call packages_init_variables
1935      before convective_adjustment_init
1936      (corresponding adjustment of TAF tape initialisation).
1937    o in calc_diffusivity/calc_viscosity extended domain to full overlap.
1938    
1939    checkpoint45a_post
1940    o compute Rho over the whole domain (extend iMin,jMin indices)
1941    o specific exchange for X-slice domain (case Ny=1)
1942  o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code  o argument futureIter of S/R obcs_calc missing in exp4 & internal_wave /code
1943  o solve_for_pressure : set cg2d_x to zero where OBCS are applied  o solve_for_pressure : set cg2d_x to zero where OBCS are applied
1944    

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