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revision 1.345 by heimbach, Thu Sep 16 22:25:23 2004 UTC revision 1.487 by jmc, Thu May 19 04:10:44 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    o pkg/diagnostics: prepare for Global/Regional statistics.
8      add 2nd namelist in data.diagnostics and update DIAGNOSTICS_SIZE.h
9    o remove "baseTime" (no used) from arg. list of DIFF_BASE_MULTIPLE
10      and rename it: DIFFERENT_MULTIPLE
11    
12    checkpoint57h_post
13    o move tIter0 from data.gchem to PTRACERS_Iter0 in data.ptracers
14    o pkg/diagnostics: change output frequency, now in seconds (instead
15      of Nb of iterations). This requires to change data.diagnostics.
16    checkpoint57h_pre
17    
18    o in mnc, let the user create the output dir if both mnc_outdir_date
19      and mnc_outdir_num are false
20    o add fflags() to pkg/diagnostics which allows one to specify, on a
21      per-file basis, the file precision [default behavior is unchanged]
22    o added diagnostics to pkg/kpp, including computation of mixed layer
23      depth based on a temperature/density criterion
24    o updated verification/natl_box to test the new pkg/kpp diagnostics
25    o bugs fixed (with useAbsVorticity=T & with useJamartMomAdv=T)
26    o test AB-3 code with 4th.Order advection scheme (advect_xy/input.ab3_c4)
27    o fix mnc flags in pkg/seaice so that they are "owned" by seaice,
28      not mnc -- this mistake was found by JMC and is now corrected
29    
30    checkpoint57g_post
31    o add Adams-Bashforth 3rd Order time stepping:
32      - default remains AB-2 (#undef ALLOW_ADAMSBASHFORTH_3)
33      - not yet implemented with NH, CD_Scheme, pTracers, MNC_pickup ...
34    checkpoint57g_pre
35    
36    o make lambda[Theta,Salt]ClimRelax spatially varying
37      (default remains spatially uniform constant based on tau)
38    o added new control variables
39      * init. uVel, vVel, etanN
40      * lambda[Theta,Salt]ClimRelax
41    o separate masks used for ctrl_pack/unpack 'from write_grid' output
42      (suggested by G. Forget)
43    
44    checkpoint57f_post
45    o add parameter "baseTime" = model base time = time at iteration zero
46      new function DIFF_BASE_MULTIPLE (replace DIFFERENT_MULTIPLE) to
47      account for baseTime shift
48    o move Coriolis arrays from PARAMS.h to GRID.h
49    checkpoint57f_pre
50    
51    o mnc-ifying the seaice package
52    o introduced an alternative length scale calculation for use in the limiting
53      maximum viscosity (off by default, see mom_vi_hdissip.F for details)
54    o S/R ptracers_calc_diff: argument list bug for CALL KPP_CALC_DIFF_S
55    o added modified Leith scheme with viscosity proportional to grad(Hdiv)
56      as well as grad(vort3).  Made it compatible with both approximate form
57      for the cubed sphere and full form of these gradients.  Added flag
58      useFullLeith to select between approximate and full form.  
59    o add "d0" in getcon.F to reduce differences between compilers/platforms
60      update output.txt of exp. fizhi-gridalt-hs
61    o change port_rand funtion to allow to set the seed.
62    o fix obscure MNC bug involving conversion between reals and integers
63      - it caused no problems with certain (eg. gcc, ifc) compilers but the
64        new version is now more standards-compliant
65    o adjoint-related modifications
66      * gad_dst3_adv_?: to be able to use advscheme=30 in adjoint
67      * gad_calc_rhs: fool adjoint, revert to advscheme=30 in reverse when using 33
68      * mom_vi_hdissip: to be able to use Leith scheme in adjoint
69    
70    checkpoint57e_post
71    o Adding eddy stress controls a la Ferreira et al.
72    checkpoint57e_pre (actually was tagged: eckpoint57e_pre)
73    
74    o fizhi pkg: fix AtoC and CtoA when called with same input & output array
75      update output.txt of exp. fizhi-gridalt-hs
76    o add more "Z" dimensions and associated coordinate vars to MNC
77    o pkg/exf: added twoDigitYear capability for option useExfYearlyFields
78    o parameter calendarDumps: when set, approximate months (30-31 days) and years
79      (360-372 days) for parameters chkPtFreq, pChkPtFreq, taveFreq, SEAICE_taveFreq,
80      KPP_taveFreq, and freq in pkg/diagnostics are converted to exact calendar
81      months and years.  Requires pkg/cal.
82    o diagnostics: add pickup functionality
83      - off by default for backwards compatibility
84      - current version only uses MDSIO -- MNC will be added
85    o allow to use pkg diagnostics for LAND pkg output & Shapiro Tendencies.
86    o pkg/shap_filt: fix for multi-tiles per face (CS-grid with EXCH2)
87    
88    checkpoint57d_post
89    o pkg/thsice used in the ocean: fix tile Pb related to sIceLoad forcing
90    o modify verification/ideal_2D_oce so that it tests the creation of mnc
91      output from the diagnostics package
92    o temporary fix in EXCH2_UV: add a 3rd call to fix the 24.tiles CS-grid set-up
93    o make genmake2 more portable by using ".$FS" instead of ".f" for more
94      of the test compilations (eg. IBM xlf on Mac OSX w/HFS filesys)
95    o add coordinate variables to the MNC output from the diagnostics package
96    o change MNC-flags default value: true when useMNC=TRUE
97    o add a "readgrid_mnc" flag to MNC and give model/src/ini_curvilinear_grid.F
98      the ability (off by default) to read the grid information using MNC
99    o lab_sea: use LSR_ERROR=1.E-12 for testing ; update output.txt
100    o diagnostics: fix a bug (sub-set of levels); keep full precision when averaging
101    o do snap-shot diagnostics at the middle of the time-interval (instead of
102      at the end).
103    o update exp. aim.5l_cs (use default LAND_OPTIONS.h file) and add
104      new test for AIM with thSIce + slab-ocean
105    o cpl_aim+ocn test: update output (optfile & default GMREDI_OPTIONS.h)
106    o move state variable diagnostics to the beginning of the time step ;
107      (note: still needs some work specially for snap-shot diagnostics)
108      duplicate & replace UVELVVEL diagnostics with UV_VEL_C & UV_VEL_Z
109    
110    checkpoint57c_post
111    o Change testing option (-ieee) to get closer agreement between g77 & ifort
112    o generate new output.txt files on faulks with g77 & the new -ieee option
113    checkpoint57c_pre
114    
115    o add "_d 0" in freeze ; change some "FLOAT" to "DFLOAT" and went back (TAF);
116      update output.txt of exp. global_ocean.90x40x15
117    o fix in ini_eos.F (one "_d 0" was missing): now g77 & ifc give much closer
118      results; update global_ocean_pressure & global_ocean.cs32x15 output.txt
119    o add saltFlux(+File) forcing capability with periodicExternalForcing
120    o allow to use pkg diagnostics for GM-Redi & ThSIce output
121    o diagnostics_fill: fill in up to sNx+1 or sNy+1 (if U,V or Z pt) for mnc.
122    o improvements for the MNC output from DIAGNOSTICS:
123      - correct handling of the unlimitied dimension
124      - all dims now have associated coordinate variables
125      - variables located at U, V, and Corner ("Z") points are now written
126        with the correct horzontal dimensions (eg. 'Xp1', 'Yp1') so that
127        *all* data points are output
128    o added seaice_summary.F and removed obsolete ALLOW_SEAICE's from pkg/seaice
129    o added pkg/seaice/seaice_monitor.F
130    o mdsio_readfield.F can now read files visible only to master MPI process.
131    o pkg/seaice: some test code for ice-modified ocean stress
132    o exf_getffields interpolation defaults to bilinear for all scalar forcing
133      fields (remains bicubic for wind velocity and stress).  This avoids, e.g.,
134      spurious negative numbers for precipitation and humidity.  Will cause
135      some small numerical differences for integrations using pkg/exf/exf_interp.F.
136    o pkg/ctrl/
137      * Add ctrlvec diagnostics in pack/unpack for nondimensional I/O
138        May be enabled via doPackDiag
139      *  introduce z-scaling of
140         + gradient (doZscalePack) and
141         + control (doZscaleUnpack)
142    o pkg/mdsio/
143      * enable useSingleCpuIO for state estimation (ctrl_pack/unpack) mdsio_gl.F
144      * N.B.: leave tiled I/O for tapelev (i.e. mds...vector)
145    
146    checkpoint57b_post
147    o simplify options in diagnostics_fill arguments (remove weird combinations)
148    o fix MNC coordinate variables so that they now contain per-face index
149      values (instead of xC,xG,yC,yG values) when run with EXCH2 since, in
150      general, EXCH2 grids are only aligned to a "local" coordinate system
151    o test diagnostics pkg in dic_example (no output) and ideal_2D_oce (with ouput)
152    o Implement instantaneous output within pkg diagnostics:
153      setting a negative frequency in data.diagnostics produces
154     "snap-shot" output (as opposed to time-average if freq > 0)
155    o move out off EQUIVALENCE all diagnostics that fizhi does not use ;
156      NOTE: change ptracer diagnostics name: use 2 characters to work with
157            more than 9 tracers. Add also diagnostics of advect & diffus flux.
158    o more CF compliance: convert all MNC 'iter' variables to 'T' so that it
159      becomes the coordinate variable for the 'T' dimension
160    o add CF-style coordinate variables to MNC
161      - just a first cut:  numbers are meaningless on the cubesphere and
162        missing along the T axis but otherwise it works!
163    o add surface flux diagnostics: TAUX, TAUY, TFLUX, TRELAX, TICE, SFLUX, SRELAX
164    o pkg/thSIce: read initial state from 6 files ; allow monitor to use MNC.
165    o add diagnostics of advective & diffusive flux for T & S (pTracers coming soon)
166      this is based directly on what the model compute, so that the content of
167      each diagnostics might be affected by switching options (e.g., implicitDiffusion)
168    o small changes for diagnostics (gad_biharm_?.F, arguments of S/R impldiff.F)
169    o clean up build options files for SunOS, in particular
170      - remove -traditional from xmakedepend
171      - change -xarch=v9 to -xarch=native for f77
172      - restore use of make (not gmake)
173      - add CC=gcc if using g77
174    o changes per discussion of AM, JMC, & EH3 today:
175      - move redundant "grid" variables out of "state" -- in preparation of
176        creating proper CF-style coordinate variables and in recognition
177        that any/all grid variables can be easily copied (eg. w/NCO) from
178        the grid files into any of the other NetCDF files
179      - *always* output grid variables with MDSIO (this will eventually be
180        changed)
181      - output MNC grid file if useMNC is true
182    o every instance of _END_MASTER() has been found and replaced with
183      _END_MASTER( myThid ) in order to satisfy certain picky Sun
184      preprocessors
185    o re-arrange diagnostics pkg initialisation:
186     - allow each package to extend the available diagnostics list
187     - add some checking and fix small problems (multi-threaded, ...)
188     - new S/R diagnostics_fill (replace fill_diagnostics):
189       look through the short list of active diag. (instead of the long list)
190       create function DIAGNOSTICS_IS_ON to tell if a diagnostics is active
191    
192    checkpoint57a_post
193    o this set of changes restores TAMC compatibility
194      tested for global_ocean.90x40x15 adjoint on trough
195      (what a pain)
196    
197    checkpoint57a_pre
198    o some modifs in tools/build_options for sunos
199    o call ctrl_pack for ctrl at end for optimcycle=0
200    
201    checkpoint57
202    o add horizontal bi-harmonic viscosity for vertical velocity
203      - new parameter viscA4W (defaults to viscA4)
204      - affects only non-hydrostatic code
205      - to be done: no-slip lateral boundary conditions
206    o switch back to "sflux = sflux - runoff" in exf_getforcing.F
207    o implement Implicit Vertical advection for pTracers
208    o depth convergence accelerator: replace deltaTtracer by dTtracerLev(k)
209      (implemented also for implicit vertical diffusion & advection)
210    o OBCS: extend application of tracer open boundary conditions
211      to a strip beyond the boundary of width Olx/Oly
212    o add call monitor to TAF set of required calls (flow directives)
213      and include in natl_box_adjoint
214    o untangle a few ifdefs related to cost, ctrl, autodiff
215      untangel a few ALLOW_ECCO_OPTIMIZATION
216    o Apply Cooper & Haines representative estimates also at sub-surface (k=Nr)
217      (theta2, salt2 in ecco_cost_weights)
218    
219    checkpoint56c_post
220    o OBCS as control variables
221      - update ctrl_ad_diff.list, obcs_ad_diff.list
222      - remove balance of obcs controls from default
223      - fix index bug nobcs in ctrl_init
224      - fix dummy fields filen in ctrl_pack
225      - add dummy weights for obcs
226    o lsopt: comment out fort.94 output
227    o optim:
228      - remove unnecessary header files
229      - adjusted namelists
230      - add xerbla.F to Makefile
231    o exf:
232      - multiple modifications of exf_check_range
233      - unit change in exf_init_runoff from [m/year] to [m/s]
234    o mdsio:
235      - i/o-vector change debugLevel from debLevA to debLevB
236    
237    checkpoint56b_post
238    o collect all ptracers output in an new routine (PTRACERS_OUTPUT) that
239      is called from DO_THE_MODEL_IO
240      - rename PTRACERS_STATV_WRITE to PTRACERS_WRITE_TIMEAVE
241      - introduce new parameter PTRACERS_dumpFreq (defaults to dumpFreq)
242      - clean up PTRACERS_WRITE_TIMEAVE a little
243    o add another verification experiment that tests both the cfc-pkg and
244      the gchem-pkg with GCHEM_SEPARATE_FORCING undefined, that is with
245      reactive tendencies treated inline with regular timestepping
246    o testreport previously did a lousy job of comparing small numbers, so
247      we (Ed and Martin) changed the  way the cut-off of 1.e-12 is
248      implemented in the little c-progam tmp_cmpnum.c which is embedded in
249      testreport.
250    o ptracers_monitor: bug fix for MPI
251    
252    checkpoint56a_post
253    o GCHEM: finish reorganizating the package
254      - forward_step calls GCHEM_CALC_TENDENDY, which computes gchemTendency
255        (introduces another 3D-array for each passive tracer, but only if
256        GCHEM_SEPARATE_FORCING is undefined. For GCHEM_SEPARATE_FORCING
257        gchemTendency is not needed because the timestep is done separately)
258      - gchemTendency is added to gPtr in GCHEM_ADD_TENDENCY
259      - GCHEM is now---more or less cleanly---separate from PTRACERS
260      - to bo done: handling of surfaceForcingPtr that is needed for KPP not
261        so clear to me how that should be done in a general way.
262    o CFC: improve formatting of output in CFC_ATMOS
263    o PTRACERS:
264      - rename GCHEM_MONITOR to PTRACERS_MONITOR and call it from MONITOR, so
265        that ALL experiments with ptracers enable can be checked. This makes
266        GCHEM_MONITOR obsolete.
267      - include a runtime parameter PTRACERS_monitorFreq that defaults to
268        monitorFreq
269      - set default PTRACERS_write_mdsio to false if PTRACERS_write_mnc is true
270    o add PTRACERS (PTR0[1-5]) to testreport output
271    o exf_check_range:
272      * default changed to .TRUE.
273      * will check values for niter0 if debLevA, every timestep if debLevB
274      * STOP in exf_check_range if 'out of range'
275      * range chosen generous to allow for potential extema
276      TBD: a version with stricter range
277           permitted range would be runtime parameters
278    o GMredi:
279      - fix ldd97 slope limit ; extend valid domain of Psi-Bolus ;
280      - change S/R GRAD_SIGMA to be valid in the overlap on CS-grid.
281      - change the default GMREDI_OPTIONS.h: compile everything except Visbeck
282    o GCHEM:
283      - move call to GCHEM_FORCING_SEP, so that it is now called before
284        the blocking exchanges to avoid computing halos in GCHEM_FORCING_SEP
285      - introduced a useGCHEM runtime flag and applied it everywhere.
286      - renamed PTRACERS_SEPARATE_FORCING to GCHEM_SEPARATE_FORCING;
287        this flag is now only visible within GCHEM-pkg routines.
288      - moved gchem_forcing_int temporarily into ptracers_forcing, this will
289        be replaced by a 3D array that is computed before thermodynamics; for
290        this, the tracer ID iTracer had to be included into the parameter list
291        of ptracers_forcing
292      - set up forward_step to call gchem_forcing, that will replace
293        gchem_forcing_int in ptracers_forcing
294      - cleaning up
295    o small cleaning of exch2: remove files that are also in eesupp/src
296    
297    checkpoint56
298    o AIM: read land-Fraction earlier (from ini-fixed) and monitor land at nIter0
299    o mnc: cleanup "full" files--fixes out-of-memory problem
300    o ECCO-GODAE
301      * model/, pkg/, code/, input/ now complete w.r.t. ECCO-GODAE production setup
302      * fully merged and updated from SIO code
303        windstress sign change affects
304        - exf_inscal_[u/v]stress
305        - sign of xx_tau[u/v] adjustments
306        - signs in cost_scat
307      * ctrl_get_gen: avoid update of tau[u/v] for first few days
308      * natl_box_adjoint updated and compressed
309      * 2-level checkpoint switch added
310        (tested in EXP. 1 of natl_box_adjoint)
311      * new switch doInitXX to avoid init. of xx_... in optimcycle=0
312    o SVD
313      * first complete, non-hacked version for SVD calculations
314      * all interfaces clean w.r.t to handling of xx_..., adxx_..., g_xx_...
315        performed via direct access files admtlm_vector.it????
316        (via ctrl_[un]pack)
317      * optimcycle is used for ARPACK iteration counter
318        (note: adxx_... is iterated, rather than xx_...; latter is constant!)
319      * EV problem ok w.r.t. L2-norm in tangent space; need to check other norms
320        and add linear transforms where necessary
321      * controls are initial/final SST, SSS (can be extended; need to check
322        ctrl_set_[un]pack_xyz.F according to ctrl_set_[un]pack_xy.F
323    o mdsio: filename info to both stderr, stdout
324    o exf: exf_inscal_runoff: separated default conversion [m/year] -> [m/sec]
325      from sign change
326    
327    checkpoint55j_post
328    o isolate dissipation tendency (allow to keep it out off AB) in V.I form.
329      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
330    o add consistent build directories and .cvsignore files to verification
331    o added viscA4GridMin and viscA4GridMax for more control on biharmonic viscosity
332    o make all subroutines 30 or less characters in length for certain older
333      compilers to work (a thorough search only turns up two routines in
334      pkg/ptracers)
335    o allow (vecinv only) a different horiz. viscosity for Divergence and Vorticity;
336      affects (truncation level) output.txt of global_ocean.cs32x15(&.thsice)
337    
338    checkpoint55i_post
339    o change arrays for total vertical diffusivity (2.D if explicit,
340      3.D if implicit) ; each ptracer uses its own background value.
341    o added mnc/NetCDF output capability to ocn_compon_interf
342      - added bits to verification/cpl_aim+ocn so that it can run on
343        ITRDA and other clusters without the mpirun "-wd" option
344    o fixed wayward endif in mom_fluxform.F that messed up cyclindrical
345      configuration
346    o give MNC the ability to create additional files rather than
347      exceeding a specified file size limit "MNC_MAX_FILESIZE"
348      - the default is just less than 2GB which is a practical limit
349        on many systems
350    o Compute the non-local term using either KPP vertical diffusivity (=default)
351       or the total vertical diffusivity (when KPP_ghatUseTotalDiffus=T)
352    
353    checkpoint55h_post
354    o add verification test "vermix"
355    o remove all the *_ioinc flags and replace with the single global
356      outputTypesInclusive flag
357    o allow to set a vertical profile of vertical diffusivity for T & S
358    o call PACKAGE_BOOT & PACKAGES_READPARMS just after INI_PARMS
359    o useMNC moved from data.mnc to data.pkg
360    
361    checkpoint55g_post
362    o Renaming carbon AD experiments to comply with testreport conventions
363    o Updating adjoint of Held-Suarez hs94.1x64x5
364    o Fixing directives for non-ECCO forward_step, after ECCO directives
365      have been fixed to avoid recomp. of do_oceanic_phys
366      Works well for global_ocean.90x40x15,
367      but recomp. issue remains for carbon
368    o Updating adjoint output for natl_box_adjoint after
369      pkg/ecco has been modified (see taga c55d_post)
370    
371    checkpoint55f_post
372    o rename to timeave_init_fixed
373    
374    checkpoint55e_post
375    o some delicate re-shuffle of store directives to avoid one
376      extra call of do_oceanic_physics
377      affects ecco_the_main_loop.F, do_oceanic_physics.F
378      checkpoint_lev1_directives.h
379    o NB: this may break global_ocean adjoint temporarily,
380      but it is clear how to fix it. Will do later, need this now.
381    
382    checkpoint55d_post
383    o ECCO specific cost function terms (up-to-date with 1x1 runs)
384    o ecco_cost_weights is modified to 1x1 runs
385    o modifs to allow observations to be read in as
386      single file or yearly files
387    o enable to read exf forcing fields as either
388      single file or yearly files (flag useExfYearlyFields)
389    checkpoint55d_pre
390    
391    o switch between 2-level and 3-level checkpointing
392    o add ability of MNC to write local and "partial" (eg. 2D slices where
393      the full 3D field is never actually stored) arrays to NetCDF files
394      with the correct (that is, the complete multi-dimensional) set of
395      array indicies
396      - used in mom_vecinv() to write the diagFreq output
397      - tested (demonstrated) in verification/aim.5l_cs
398    o further mnc-ification
399      - add verification/lab_sea to the list with mnc setups
400      - fix undefined mnc v-names in cd_code
401      - add kpp to mnc output (both snapshot and timeave)
402    o non-hydrostatic code
403      - added horizontal viscosity parameter viscAhW for w, that replaces viscAh
404        in calc_gw.F
405      - defaults to viscAh
406      - this is useful, when I want to use viscAh=0 (e.g., only biharmonic
407        friction or Leith) in non-hydrostatic mode, as long as there is
408        no biharmonic friction and/or Leigth or equivalent for vertical velocity.
409    o pkg/cost
410      extend simple cost functions to treat time mean quantities
411      (T,U,V) via cost_accumulate_state from cost_tile
412    o multidimAdvection on CS-grid: implement the full 3 pass ; overlap needs to
413        be 2 times larger than the minimum size the advection scheme requires.
414        now get a perfect conservation of salt in advect_cs test-exp (updated)
415    o GGL90 (Gaspar's TKE mixed layer)
416      - add horizontal diffusion of TKE, requires exchanges in
417        do_fields_blocking_exchanges, horizontal diffusivity is zero by
418        default. In OPA there is no horizontal diffusion of TKE but the
419        mixing coefficients are computed from a horizontal average of TKE of
420        6 points or so. I think that diffusion has a little more physical
421        justification.
422      - clean up ggl90_calc in the hope of reducing memory usage (this hope
423        was in vain)
424      - mask tke-variable in ggl90_init
425    o fix mask Pb in multidimAdvection on CS-grid (still a small Pb with ipass)
426    o fix biharmonic diffusion on CS-grid.
427    o more obcs stuff
428      - added obcs_external_fields_load as an alternative to the EXF-pkg option
429        for reading boundary values. This routine is called from
430        obcs_prescribe_read
431      - updated obcs_check
432      - changed sponge layer relaxation parameter units for days to seconds
433      - turned off sponge layer by default
434      - changed argument list of OBCS_CALC to myTime+deltaTclock
435      - fixed about 35 bugs in obcs_external_fields_load
436    
437    checkpoint55c_post
438    o obcs stuff
439      - new runtime flags useOBCSprescribe, useOBCSbalance
440      - re-arranged obcs_calc
441      - moved exf_getobcs to obcs_prescibe_read
442        obcs_prescibe_read is called after ORLANSKI stuff
443        and independent of it (executable can contain all).
444      - updated obcs_check
445      - added exchanges for U,V,gU,gV for useOBCSprescribe=.TRUE.
446        These may be necessary only if tangential velocities are
447        prescribed at OB, not sure, needs testing.
448    o make the MNC_CW_ADD_VATTR_* subroutines all take scalar arguments
449      which simplifies the calls and passes the ifc check-bounds test
450    
451    checkpoint55b_post
452    o add a 2D scalar, Z location, exchange_2 routine.
453    o EXCH_UV for CS-grid: add one u,v in the corner-halo region, allows
454      to compute vorticity on a wider stencil [e.g., vort3(0,1)&(1,0)]
455      affects advect_cs results (for the wrong reason): update output.txt
456    o use a more standard discretization for biharmonic viscosity ;
457     (original version still available with #define MOM_VI_ORIGINAL_VISCA4 )
458      affects results of dome set-up: update output.txt
459    o fix gad_advection.F (CubedSphere part), back to version 1.23
460    o fix bug in mom_vi_del2uv.F (CubedSphere part).
461    
462    checkpoint55a_post
463    o merged code to
464      * prescribe/read time-dependent open boundaries
465        (works in conjunction with exf, cal)
466      * sponge layer code for open boundaries
467      * each boundary N/S/E/W now has its own CPP option
468        (healthy for the adjoint)
469    
470    checkpoint55
471    o up-to-date adjoint of previous breaks
472      - natl_box_adjoint: problem for exp 12, 13: cost = 0. needs fix
473      - global_ocean_ebm: adjoint still needs fix (TLM ok)
474      - global_ocean.90x40x15: extended GMREDI_OPTIONS.h
475      - carbon: * remove tr1-related adjoint verification
476                * add ptracer as control variable
477    o remove all tr1-related code (ALLOW_PASSIVE_TRACER)
478      (adjoint stuff still has some tr1 'names', but all use ptracer arrays)
479    
480  checkpoint54f_post  checkpoint54f_post
481  o in verification/carbin/ remove experiment related to  o in verification/carbin/ remove experiment related to
482    ALLOW_PASSIVE_TRACER (array tr1 etc)    ALLOW_PASSIVE_TRACER (array tr1 etc)

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