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revision 1.618 by jmc, Thu Mar 2 22:52:09 2006 UTC revision 1.859 by jmc, Fri Aug 17 20:51:27 2007 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
8    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
9       at face corners.
10    o pkg/generic_advdiff:
11     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
12      loop range indices for computing vertical advection tendency
13      and do the calculation in the interior only (no overlap) ;
14      for now, only implemented for SOM advection (to save CPU time).
15     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
16    o exch2 adjoint
17      First set of changes:
18      - add exch2 hand-written adjoint templates
19      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
20        This will require cleanup in pkg/autodiff/*.F
21        (changed routines currently kept separate in verif. code/)
22      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
23        that used to hide exch2 or cubed-sphere specific code
24        (commented via 'cph-exch2')
25    o pkg/seaice
26      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
27    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
28       output of global_ocean.cs32x15.thsice .
29    
30    checkpoint59e
31    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
32      for B-grid vector (not yet tested) and C-grid vector (<- only used
33      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
34    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
35      (#ifdef ALLOW_SALT_PLUME)
36    o gather_2d/scatter_2d: removed halo regions
37    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
38      scheme and the corresponding test case (under front_relax dir). For now,
39      only available with Skew-flux form and not yet tested in realistic set-up.
40      adjoint: store directives updated, but gradient checks deteriorated,
41      so maybe GM/Redi adjoint is now broken.
42    o seaice adjoint
43      * add AREA, HEFF, HSNOW as control variable
44        (should not change lab_sea results)
45      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
46    o pkg/seaice:
47      * added computation of saltFlux in seaice_growth;
48        For time being, sea ice salinity is assumed constant
49        contribution of snow flooding to freshening of sea ice is neglected.
50        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
51        defaults to 0.0 in order to maintain backward compatibility.
52        Typical values for SEAICE_salinity are 4 to 10 g/kg.
53      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
54      * added SEAICE_availHeatFrac, which specifies fraction of surface level
55        heat content used to melt or grow ice
56      * commented out cap of HICE: it helps keep ice thinner
57      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
58      * applied OBCS T/S mask to HEFFM sea ice mask
59    
60    checkpoint59d
61    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
62     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
63     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
64    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
65     and change default value of parameter "GM_Small_Number";
66     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
67       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
68       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
69    o pkg/ecco: cost function when applying pkg/smooth to controls
70    o pkg/ctrl: add forcingPrecond run time parameter
71    o pkg/seaice:
72     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
73     - fix bug in metric terms of u-equation in LSR solver (implicit part),
74       changes verification/lab_sea
75     - rearrange implicit part of u-equation in LSR solver to make it easier to
76       read, understand, and debug. This causes changes at the truncation level.
77     - fix (serious) bug in the boundary conditions (sign error in the implicit
78       part) of the LSR solver. Changes all LSR results.
79     - fixed problem with HSNOW initialization to avoid thick snow when AREA
80       is initilized with small values - does not change lab_sea results.
81     - added HsnowFile initialization capability
82    o pkg/smooth: addition to model/src and pkg/ctrl so allow
83     initialization of pkg/smooth and application to control vector
84    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
85    o dependencies: pkg/profiles requires pkg/cal
86    o pkg/profiles:
87     - added option ALLOW_PROFILES_GENERICGRID
88         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
89         that interpolation information (grid points and coefficients) is provided
90         within the netcdf input files.
91         -> sample matlab scripts can be found in MITgcm_contrib/gael
92         that allow you to prepare netcdf input files.
93     - also modified: cleaner include statements, cleaner error print statements,
94       cleaner stops when error, and more tests of the netcdf input files consistency.
95    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
96    o pkg/seaice:
97     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
98       requires a new routine: seaice_diagnostics_fill.F
99     - make sure that seaice does not move if not forced (pressure replacement
100       method, Hibler and Ip, 1995), changes results
101     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
102     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
103       It is turned off by default (=-1.), because it changes the results.
104     - make it possible to read AREA from a file, too.
105    
106    checkpoint59c
107    o add S/R and diagnostics for oceanic mixed-layer depth
108    o move GMRedi call after all vertical mixing schemes (including KPP)
109    o pkg/thsice:
110     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
111      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
112    o pkg/obcs:
113     - bug fix for balance code
114    o pkg/seaice:
115      - allow values of SEAICE_elasticParm > 1
116      - add new parameter SEAICE_evpTauRelax as an alternative
117        to SEAICE_elasticParm
118      - make lsr boundary conditions free slip (by default), changes result
119      - add code for no slip boundary conditions for lsr
120      - set minimum of zeta to zero (and not 4e8) (changes results)
121      - add a cap on AREA after advecting AREA if seaice_growth is not called
122    o change calculation of Visbeck K:
123      - no longer depend on tapering scheme; instead, compute slope (limited
124        by GM_maxSlope). this is equivalent to what was comuted before with
125        clipping or linear tappering.
126      - fix vertical averaging (wrong by 1/2 level)
127      - leave the old version (but will not be maintained) within
128        #ifdef OLD_VISBECK_CALC / #endif
129      - update output of exp. ideal_2D_oce
130    o change error catch in calc_r_star to improve vectorization
131    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
132      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
133    o adjoint:
134      Re-organized adjoint checkpointing according to Matt Mazloff
135      (but with modifs/completions/cleanups)
136      Storing is now bundled into large arrays to optimized I/O
137      (and second step in cleanup of the_main_loop)
138    
139    checkpoint59b
140    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
141      - export/import (between ocean & coupler) fields needed for ocean DIC.
142    o pkg/seaice:
143      - get rid of three more exchanges seaice_calc_viscosities (required
144        different loop boundaries in seaice_lsr and seaice_ocean_stress)
145      - bug fix in seaice_ocean_stress (update of lab_sea required)
146      - reduce loop boundaries to necessary minimum also in seaice_evp
147      - go back to the old way of computing deltaC/Z as the adjoint likes that
148        better
149    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
150      passive tracer to an Age Tracer) + update output.txt
151    o pkg/exf:
152      - implement A-grid / C-grid selection for wind-stress input files.
153      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
154      for now, in exf_bulk_largeyeager04.F only :
155      - change implementation for case where windspeed + 2. components wind-stress
156        are read-in. AND use rhoConstFresh to convert evap.
157    o pkg/seaice:
158      - use correct EXCH_UV for wind-forcing (on A-grid).
159      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
160        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
161    o pkg/exf:
162      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
163      EXF_INTERPOLATION:
164      - merge global_with_exf/code version of exf_interp_read.F
165        to the main code ;
166      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
167        reading the file ; Important: This options needs to be defined to recover
168        previous code.
169        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
170      - no longer loose real*8 precision along the way when using exf_iprec=64.
171    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
172      - change discretisation of evp-solver in order to avoid another exchange
173        (changes lab_sea) and clean up a little
174      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
175        help the adjoint (this also changes the results slightly)
176      - add a few "_d 0" where they had been missing in seaice_evp.F
177      - cleaning up: remove unused seaice_calc_rhs.F
178    o pkg/exf: some cleaning-up:
179      - change various "constants" into runtime parameters
180      - cleaned-up Large&Yeager04 routine which should eventually
181        replace exf_bulkformulae.F (changed names of S/R and CPP)
182        and merged various ALLOW_ATM_WIND options
183     only used with thsice pkg (in thsice_get_exf.F):
184      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
185        which are used when useStabilityFct_overIce=TRUE (= the default)
186      - change default values of ice & snow emissivity and scale downward LW
187        by ice & snow emissivity.
188    o pkg/thsice:
189     fix few little problems, in thsice_calc_thickn.F:
190      - growth vertically (and not laterally) if iceFrac == iceMaskMax
191      - melt only laterally if hIce < hThinIce (as the comments say)
192      and in thsice_extend.F:
193      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
194      - start to form ice as soon as the minimum ice-volume is reachable.
195     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
196      and cpl_aim+ocn
197    o pkg/kpp
198     - move computation of surface related input fields to KPP into a new
199       subroutine kpp_forcing_surf.F
200     - remove wrong (within bi,bj loops) EXCH calls.
201     - little cleaning (add argument myThid in last position, cvs header ...)
202     - for now, fix conservation problem by exchanging KPPviscAz (may not
203       be the best fix)
204    o pkg/seaice
205     - check for inconsistent evp parameter/cpp-flag combination
206     - remove leftover errIO flat for obsolete name list error handling
207    o OpenAD
208     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
209    
210    checkpoint59a
211    o pkg/seaice: some parameter clarifications and a little bit of clean up
212    o pkg/thsice: rename run-time parameters:
213       himin       -> hIceMin
214       himin0      -> hThinIce
215       hihig       -> hThickIce
216       i0          -> i0swFrac
217       transCoef   -> bMeltCoef
218       frac_energy -> fracMelting
219      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
220       with default values (for now) that do not change the results.
221      remove old version of thsice vars advection in pkg/seaice.
222    o in FFIELDS.h:
223      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
224      - make pLoad & sIceLoad always available (but still only used if
225         ATMOSPHERIC_LOADING is #define).
226    o pkg/kpp: replaced _KPP_RL with _RL
227    o bug fixes for vertical diffusivity computations when both KPP and
228        3D diffusivity arrays are used.
229    o pkg/seaice: fix bug in evp solver, while doing that
230      - change (improve?) discretization of stress computations for both
231        cgrid-lsr and evp solver
232      - add a new routine to compute strain rates
233      - the above changes lab_sea results
234      - add no slip conditions for evp solver (off by default), lsr-version
235        may follow
236      - fix exchange for shear at Z-points (does not change lab_sea)
237      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
238        (to force the user to pick a time step since there is not "safe" way
239        of choosing it)
240      - add principal stress diagnostics
241      - rearrange fields for evp a little to avoid having to call a: too many
242        exchanges and b: exchanges for stress trensor components which we do
243        not have.
244      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
245        of evp, complete rewrite for lsr case (latter is does not yet work
246        in all cases)
247    o pkg/kpp: add code to have mixing in shelf ice caverns
248      - add myThid to all kpp routines (long overdue)
249    
250    checkpoint59
251    o pkg/exf:
252      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
253        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
254      - move exf header files from lower_case.h to UPPER_CASE.h ;
255        add missing cvs Header & Name
256      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
257      - add namelist param. selectStressGridPosition, exf_monFreq
258      - retire many _CLIM routines, and remove data.exf_clim
259        + params moved to data.exf
260        + climsst, climsss now handled by exf_set_gen, i.e.
261          climss?period=0 refers to constant field,
262          climss?period=-12 to monthly forcing
263      - split up namelists in data.exf
264    o pkg/seaice:
265      - remove seaice_exch and seaice_exch_uv
266      - remove superfluous exchange of theta
267      - add myThid to seaice_budget_ocean/ice
268      - add new interface for atmospheric wind forcing (C-grid only)
269        + new routine
270        + two new field (taux, tauy for stress over ice)
271        + removed one global field (DAIRN) for C-grid case only
272    o pkg/thsise
273      - 2nd set of modifs for thsice adjoint in conjunction with exf
274    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
275    
276    checkpoint58y_post
277    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
278      vertical diffusivity, similar to that in MOM4; turned on using
279      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
280      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
281    o Added capability for 3D specification of background vertical diffusion
282      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
283      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
284      "data" file that contains the 3D vertical diffusivity coefficients.
285    o ice dynamics (pkg/seaice) with thsice thermodynamics:
286      - add code within pkg thsice to advect & diffuse sea-ice fields
287      similar to (and will replace) what has been added in  seaice_advdiff.F,
288      but: - conserving Mass, Heat & Salt.
289           - better when using non-linear advection scheme (not yet fully tested)
290           - can also be used in atmospheric set-up (for now, only the diffusion).
291    
292    checkpoint58x_post
293    o IO option for global-file compact format:
294      - add options when generating topology (utils/exch2/matlab-topology-generator)
295      - add I/O capability (pkg/mdsio).
296      - adapt utils/matlab/rdmds.m to read this format.
297      for now long-line format not yet supported by pkg/mdsio (& exch2).
298    o shelfice: add a few diagnostics
299    
300    checkpoint58w_post
301    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
302      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
303      (and replace horiVertRatio in NH code).
304      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
305                         and tutorial_plume_on_slope (sensitive to truncation)
306    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
307      directly to drive seaice model (C-grid only)
308    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
309     - reintroduce computation of wind from stress,
310     - compute tau (in exf_bulkformulae.F) from windstress averaged to
311       mass points to avoid tau = 0
312     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
313    o rdmnc.m: make it work with "global" files created with gluemnc
314    o rdmnc.m : some improvements in dealing with singleton dimension
315      (tested on all testreport mnc output files).
316    o genmake2: disable pkg/profiles if netcdf test fails.
317    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
318    o move call to cal_readparms up to make calendar parameters/variable available
319      to all packages
320    
321    checkpoint58v_post
322    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
323      useDynP_inEos_Zc tested.
324    o pkg/exf: changes to properly interpolate/mask/scale initial fields
325    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
326      and portions thereof.  See read_cs.txt for description and examples.
327    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
328      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
329      following the great-circle arc between those 2 points.
330    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
331      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
332    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
333     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
334     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
335     - still needs work (not working with some options ; efficiency to improve)
336       and serious testing.
337     - use this scheme for temperature & salinity in 2 advection test exp.:
338       advect_xy & advect_xz, respectively.
339    
340    checkpoint58u_post
341    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
342    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
343    o testreport: add option "-skipdir" to skip some test.
344    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
345      momentum calculation.
346    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
347    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
348      remove checkpoint.F and the_correction_step.F (no longer used);
349      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
350    o add option (linFSConserveTr) to correct for tracer source/sink due to
351      Linear Free surface
352    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
353    o pkg/thsice: fix reading mnc-pickups
354    
355    checkpoint58t_post
356    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
357    o pkg/mdsio:
358     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
359       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
360       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
361     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
362     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
363       either MDS_READ_FIELD or MDS_WRITE_FIELD )
364     - new S/R (to replace MDSWRITEMETA), which allows to write more
365       informations (variable names, time ...) to meta files.
366     - modify rdmds.m to give back the meta file content.
367    o pkg/diagnostics: change vertical interpolation to be safer, and more
368       flexible (define p-levels to interpolate to in data.diagnostics);
369      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
370       diagnostic pointer.
371    o pkg/seaice: more cleaning up of seaice_growth, added many comments
372    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
373    o fix multi-category seaice:
374     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
375       SEAICE_MULTICATEGORY
376     - fix short wave heat flux
377    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
378       and allow to use EVP solver. Change forward lab_sea: test both EVP
379       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
380    o Initial check-in of lab_sea adjoint
381      (very similar to natl_box_adjoint/code_seaice)
382      * used C-grid and EVP solver
383      * used KPP, GM/Redi
384      * uses inAdExact=.TRUE.
385      * gradient checks fail for both ADM and TLM
386        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
387        f.d. gradients actually seem more problematic than ADM, TLM gradients;
388        issue is related to forward mismatch between g77 an ifort
389    o pkg/seaice: overhaul of thermodynamics
390     - growth.F and groatb.F are replaced by new routine seaice_growth.F
391     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
392     - move a few global fields out of SEAICE.h into seaice_growth.F and
393       make them 2D (FICE/QNETO/ ...)
394     - remove FO (it is the same as QNETO)
395     - introduce a few local fields to avoid modifying external fields such
396       as atemp, etc.
397    
398    checkpoint58s_post
399    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
400      changed exf_set_gen.F so that
401        genperiod=0 means input file is one time-constant field and
402        genperiod=-12 means input file contains 12 monthly means
403    o CG2D: use pre-computed solver main-diagonal (stored in common block);
404      this affects truncation error ; generate new output file for exp. which
405      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
406        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
407        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
408        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
409        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
410        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
411    o start implementation of deep-atmosphere and anelastic formulation
412    o verification: remove 2nd copy of input files and use script "prepare_run"
413      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
414    o mom_common/vecinv/fluxform: fix a few initialisation isssues
415    o profiles: fix for multithreaded case
416    
417    o diagnostics: rename few diags:
418      s/'PRESSURE'/'RCENTER '/g
419      s/'TICE    '/'oceFreez'/g
420      s/'TAUX    '/'oceTAUX '/g
421      s/'TAUY    '/'oceTAUY '/g
422      s/'SWFLUX  '/'oceQsw  '/g
423      s/DIFx/DFxE/g
424      s/DIFy/DFyE/g
425      and add few ocean-forcing diagnostics:
426      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
427    o modifications to pkg/seaice/growth.F and budget.F, which change results of
428      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
429      as actual snow thickness.  It now refers everywhere to effective snow
430      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
431    
432    checkpoint58r_post
433    o modifications to pkg/seaice/growth.F, which change results of
434      lab_sea experiment: fixes pertain to melting snow over open water, to
435      masking EVAP under sea ice, and to using the correct AREA variable for
436      computations of EVAP, PRECIP, HSNOW, and GHEFF
437    o add ability to read bathy, salt, and theta using MNC (off by def)
438    o add flooding algorithm and advection of HSNOW for pkg/seaice;
439      both are turned off by default and do no change any results
440    o seaice advection with pkg/thsice: a step toward the use of non-linear
441      advection scheme, but #ifdef or commented out for now (requires more EXCH).
442    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
443      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
444      in natl_box (affects results @ truncation level: update output.txt)
445    o multi-threading and IO:
446      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
447      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
448        (needed to work with SingleCpuIO): tested in all verif. exp.
449    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
450      affects the results (but none of the verification test uses this scheme).
451    o Adding some pkg/diagnostics capability to pkg/seaice
452      (will certainly be subject to changes)
453    o ctrl: adding new control variables:
454      lwflux, lwdown, evap, snowprecip, apressure, runoff
455    
456    checkpoint58q_post
457    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
458      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
459      high_res_cube configuration by 4% on Columbia.
460    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
461      add (in global_with_exf/code) a version of EXF_INTERP_READ without
462      dynamical allocation (seems to work in multi-threaded).
463    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
464      single CPU io) so that TAF does not have to see EESUPPORT.h
465    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
466    
467    checkpoint58p_post
468    o obcs: stop if obcs is used with useCDscheme = .true.
469    o shelfice:
470     - fix a sign error so that no slip at shelfice interface works
471     - remove stop for combination non-hydrostatic code and shelfice. That does
472       not mean, that the results are correct, but at least they are numerically
473       stable
474    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
475    o added adjoint exch routined for all exch*3d* routines
476      and updated flow directives
477    
478    checkpoint58o_post
479    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
480      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
481    o change controling S/R for writing pickup file (new S/R do_write_pickup)
482      and clean-up reading/writing of pickup files.
483    o fix local version of read/write pickup (NH part) in rotating_tank/code
484    o simplify EXCH interface:
485     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
486     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
487    o added the regrid package
488    o shelfice:
489     - add a simple boundary layer scheme to reduce noise
490     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
491    
492    checkpoint58n_post
493    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
494       local variable (not in common block).
495    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
496      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
497      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
498        to work with SingleCpuIO.
499    o add "_d 0" to real constant of pkg/cfc subroutines ;
500       update exp. cfc_exemple & tutorial_cfc_offline output files.
501    o multi-threading and IO:
502      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
503        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
504      - barrier before and after reading.
505      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
506      - avoid using MDS_WRITELOCAL for LAND pkg output.
507      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
508        common-block variables ; Allows multi-threading with master-thread IO.
509    o change default MAX_NO_THREADS from 32 to 4 ;
510      and stop cleanly when MAX_NO_THREADS is too small.
511    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
512    
513    checkpoint58m_post
514    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
515       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
516    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
517       keep global_ocean.90x40x15 (for AD testing) with former secondary test
518       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
519    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
520        add MITgcm_tutorials (= code + all the tutorials)
521    o ecco, option to compute cost for total ssh (mean+anom)
522    o consistent with addition of ptracer and ssh in pkg/profiles
523    o profiles: adding ptracer and ssh
524    o testreport: change multi-test output-file name
525      (from output.txt.{name} to output.{name}.txt)
526    o profiles: now ok for mutli-tiles case
527    o seaice: add 4 parameters for different advection schemes for area,
528      (effective) seaice thickness, enthalphy, and snow height. Their default
529      is the standard parameter SEAICEadvScheme
530    o calc_gw:
531     - add cosFacU in zonal viscous flux (harmonic.visc.).
532     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
533       of tutorial_plume_on_slope.
534    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
535    o calc_gw: true flux-form, account for horizontal grid spacing.
536      update rotating_tank results, but not plume_on_slope (affected at
537      truncation level, 11 digits).
538    
539    checkpoint58l_post
540    o calc_gw:
541     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
542     - remove side-drag for now (need to fix it); update plume_on_slope results.
543     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
544    o commit code to make SST/SSS weights spatially variable
545      (based on either variable in-situ or variable initial T/S weights)
546    o pkg/ecco:
547      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
548        now based on horizontally varying weights wthetaLev, wsaltLev
549      * cost_averagesflags now returns year indices in addition to day, month
550      * sflux balance is performed on annual basis
551        (sflxumm, sfluxmm2, bal_sfluxmm)
552      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
553        including separate counting and multipliers
554    o pkg/rbcs
555      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
556    
557    checkpoint58k_post
558    o testreport:
559     - always build in dir. "build" (if not there, mkdir build instead of building
560       & running in input)
561     - run in dir run (if it exists), in build otherwise.
562     - call prepare_run (if input/prepare_run exists)
563     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
564    o pkg/exf modifications to interpolation and rotation routines for more
565       reasonable treatment of North Pole singularity: for tracers North Pole
566       value is set to northernmost zonal-mean value, for zonal velocity it is
567       set to zero, and for meridional velocity it is set to northernmost value.
568    o pkg/exf/exf_check_range.F
569     - add tile index to diagnostics and move stop statement to the very
570       end of the routine.
571    o pkg/diagnostics: (diagnostics_main_init.F)
572      define title of isomorphic variables according to the current config.
573    o pkg/thsice with pkg/seaice dynamics:
574    - fix domain of computation (interior only, required for exf) and do exchanges
575    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
576    o towards a standard way of dealing with multi-threading in MONITOR
577      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
578    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
579       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
580    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
581    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
582    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
583       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
584    o tracer advection:
585     - clean-up and simplify calc_common_factors.F
586     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
587       advection subroutine (but still not used within DST advection S/R)
588    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
589    
590    checkpoint58j_post
591    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
592      from file (collects calls previously in FORWARD_STEP)
593    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
594    o adjoint store dir. adjusted accordingly
595    o genmake2
596      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
597    
598    checkpoint58i_post
599    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
600      on wind stress (SEAICEstressFactor defaults to 1.)
601    o Total number of Timers is finite (<=40): comment out 2 non-essential one
602      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
603    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
604      on CS-grid: no longer loosing mass.
605    o exf & curvilinear-grid: no longer modify longitude xC & xG.
606    o pkg/ggl90: fix sloppy output and fix a bug
607    o pkg/seaice: added SEAICEuseEVPpickup parameter
608      - Set to false in order to start EVP solver with
609        non-EVP pickup files when using SEAICEuseEVP
610      - fix sign error in diffusion in seaice_calc_rhs
611    
612    checkpoint58h_post
613    * Modifications for bottom topography control
614      o replace hFacC by _hFacC at various places
615      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
616      o add non-self-adjoint cg2d_nsa
617      o update autodiff support routines
618      o re-initialise hfac after ctrl_depth_ini
619      o works for 5x5 box, doesnt work for global_ocean.90x40x15
620    * Adding verification for 5x5 box (4-layer) bottom topography control
621    
622    checkpoint58g_post
623    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
624       used for mean seasonal cycle, mean diurnal cycle); add an example
625       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
626    o pkg/ggl90:
627      - add parameter (minimum surface kinetic energy)
628      - fix bug (avoiding division by zero)
629    o couple pkg/thsice to pkg/seaice:
630      - modify advection in seaice to accomodate new scalar fields to be advected
631      - only muliDimAdection scheme work with seaice/thsice
632      - mapping of thsice-variables to seaice-variables, back and forth
633      - does not break the verification experiments, but does not give the
634        desired results either
635    o pkg/seaice
636      - make (default) second order advection a bit less confusing?
637    
638    checkpoint58f_post
639    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
640      to pkg/seaice):
641      - new routines thsice_map_exf and thsice_get_exf provide the interface
642      - add an additional formal parameter to thsice_solve4temp
643    o pkg/exf:
644      - add new fields wspeed, snowprecip (to be able to couple to thsice)
645      - correct Stefan-Boltzmann constant
646      - new parameter for longwave surface emittance
647      - separate some stuff from exf_bulkformulae into new routines  
648        exf_radiation, exf_wind
649      - add new parameters and constants: longwave emissivity for ocean, ice
650        and snow, evaporation parameters over ice
651      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
652        either wind from stress or stress from wind
653    o pkg/thSIce:
654    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
655    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
656       and THSICE_CALC_THICKN
657    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
658    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
659      to make debugging easier.
660    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
661    o pkg/bulk_force:
662      - clean-up comments and parameters ;
663      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
664    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
665      generate new output for test-experiment: aim.5l_cs.thSI
666    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
667      testreport accordingly
668    
669    checkpoint58e_post
670    o SEAICE_CGRID adjoint done
671    o R_STAR adjoint implemented.
672      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
673      * need to sort out init. of h0facc, etc.
674    o Make pkg/profile fully independent of ecco,cost, etc. stuff
675      to be able to use it in pure forward.
676    
677    checkpoint58d_post
678    o upgrade simple test-experiment to tutorial example:
679     step.1: duplicate the experiment and (step.2) will remove the old copy.
680      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
681      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
682      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
683      tutorial_global_oce_biogeo    <- copy of dic_example
684      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
685      tutorial_plume_on_slope       <- copy of plume_on_slope
686      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
687      tutorial_global_oce_optim     <- empty for now (David ?)
688      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
689     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
690    o correct a sign problem in cost_scat.F
691    o obcs and ptracers: fix boundary conditions for advections schemes
692      with larger stencil
693    o thsice adjoint: start
694    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
695      completeness
696    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
697      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
698    o ptracers adjoint:
699      * avoid extensive recomputatations
700      * fix missing re-init. of gptr (missed by TAF)
701    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
702      me to turn off the excessive output to STDOUT that this package produces
703    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
704      and add those terms in Vector-Invariant formulation.
705    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
706      if the control period (xx_hfluxperiod etc) is 0
707    o in profiles pkg, clean routines and fix details
708    o in ecco pkg, reading ssh data:
709      fix problem in case the model does not start at iter0=0
710    o fix mnc-pickup/restart for ptracers
711    o new package prifiles:
712      code to compute profile-based cost by Gael Forget
713      (modifs in ecco, ctrl, autodiff)
714    o Benign bug fix in initialization (spotted by M. Mazloff) of
715      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
716    
717    checkpoint58c_post
718    o adjoint: finish NLFS adjoint and provide reference output in
719      verification/global_ocean.90x40x15/results_ad_nlfs
720    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
721      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
722      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
723      with SEAICE_CGRID defined.
724    o move calendarDumps from "data" to "data.cal" and clean-up the code
725      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
726    o add useEXF & useCAL flags (for now, set in hard-coded way)
727    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
728      (were missing in NH mode, and wrong in quasihydrostatic mode).
729      waiting for Chris updated version of calc_gw to add those CALLs.
730    o fix bug in quasihydrostatic S/R ;
731      add a test for this option: global_ocean.90x40x15.qshyd
732    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
733      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
734    o add on/off flag useOffLine for package OFFLINE
735    o seaice:
736      - modify advection so that it works also on the C-grid
737      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
738        problem in multi-tile runs with C-grid
739      - add flags for clipping ice velocities and/or masking solver forcing
740      - fix drag (ocean on ice) formulation and a bug that caused noise in the
741        C-grid solver
742      - added a few comments to seaice_diffusion.F
743      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
744        are now exclusive)
745      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
746        required re-ordering the code a little:
747       + make DAIRN global variable (defined in SEAICE)
748       + move computation of the viscosities eta and zeta into a new separate
749         routine (because I need to recompute them in seaice_ocean_stress.F)
750    
751    checkpoint58b_post
752    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
753      update output.txt of exp. aim.5l_cs.thSI
754    o various mnc cleanups and improvements:
755      + shrink lookup tables by factor of ~4
756      + better error reporting when running out of lookup space
757      + able to handle longer path/file names (up to 500 chars)
758    o adjoint:
759      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
760      - TBD: "hidden" mom_vecinv recomp. in dynamics
761    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
762     (allow to differentiate between forcing components using new integer flags:
763      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
764     and add new flag to put Dissipation tendency out of Adams-Bashforth.
765    o ecco
766      - enable trend removal from SSH anomaly obs.
767    o adjoint
768      - a fix for PmEpR when #undef EXACT_CONSERV
769      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
770      - try to fix "hidden" recomp. in forward_step for NLFS
771        (NLFS seems broken sometimes after I checked it in)
772    o seaice:
773     - add c-grid version of the dynamic solver:
774       + three new routines that are the c-grid substitute lsr, dynsolver
775         and ostres
776       + put a few fields that were local to dynsolver into global common
777         blocks, so that I can move the computation of stresses etc into
778         seaice_lsr (saves coding but may break the adjoint).
779     - replace more hardwired parameters by runtime parameters
780     - add ice masks that mask the rhs of the implicit solvers where there
781       is no ice (commented out in seaice_dynsolver, because i am not sure
782       if this works properly), eventually this should replace the clipping
783       of ice velocities in seaice_dynsolver to +/-40cm/s.
784    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
785      include it only where its needed
786    o move balancing of fluxes before the call of external_forcing_surf
787    o seaice:
788      - correct units of turning angles (now they are really in degrees)
789      - move computation of GWATX/Y out of main routine into dynsolver
790      - initialize GWATX/Y in seaice_init
791  o Apply mask on Fresh-Water flux (needed for SSH forcing).  o Apply mask on Fresh-Water flux (needed for SSH forcing).
792    update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)    update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
793  o seaice: add runtime flags for turning angles (default to zero)  o seaice: add runtime flags for turning angles (default to zero)
794  o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean  o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
795    and trend from exf forcing and ctrl control adjustments    and trend from exf forcing and ctrl control adjustments

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