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revision 1.619 by mlosch, Fri Mar 3 07:52:57 2006 UTC revision 1.966 by jmc, Fri Mar 7 19:25:48 2008 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    checkpoint59o
8    o dome/code/obcs_calc.F: avoid division by zero (detected using gfortran).
9    o change the loop ordering in most gad_*_adv_x.F to improve vectorization:
10      move a few statemens out the main loop into separate loops
11    o pkg/shelfice:
12      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
13        (kg/m^2/s), does not break tests, because in verification/isomip,
14        rhoConstFresh=rhoConst (by accident)
15      - rearrange computation of tLoc, sLoc, pLoc to make code more efficient
16      - move S/R find_rho_scalar, pkg/ecco/sw_ptmp.F, pkg/ecco/sw_adtg.F into
17        new file model/src/seawater.F, so that they are available for all pkgs.
18      - convert potential temperature into in-situ temperature. This changes the
19        isomip tests => update tests
20    o add a flag writePickupAtEnd (default=true) to be able to suppress
21      writing a pickup at the last timestep
22    o tools/mpack-1.6 :
23      - disable automake (not working) and autoconf (not needed).
24      - update to version 1.6.4 which fix MD5 code on some 64 bits platforms
25        also cleaner with much less compilation warnings.
26    o pkg/profiles:
27      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
28      (for "less than 32 characters name" compiler requirement)
29    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
30      conditions that have a different sampling frequency than S/T/U/V obcs
31    o pkg/diagnostics (stats-diags):
32      - fix global Min/Max in case 1 processor get only empty tiles
33    o genmake2: replace (4 times)
34         make genmake_tc_1.o >> genmake_warnings 2>&1
35      with
36         COMM="$CC $CFLAGS -c genmake_tc_1.c"
37         echo $COMM >> genmake_warnings
38         $COMM >> genmake_warnings 2>&1
39      to make genmake2 always see the value of CC as specified in the optfile.
40    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
41      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
42      - modify verification advect_cs test to test SOM-advection on CS-grid.
43    o pkg/ctrl:
44      - Rewrite of ctrl_map_ini_ecco.F,
45        introducing a generic routine (ctrl_map_ini_gen.F).
46      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
47    
48    checkpoint59n
49    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
50      number in dedicate array "hdiag":
51      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
52        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
53      - many small changes (integer format) for large number of diagnostics
54      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
55        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
56    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
57      usingSphericalGrid, this allows to define the rotated grid coordinates
58      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
59      geographical coordinates according to the inverse of the rotation defined
60      by the Euler angles, so that Coriolis parameter and online-interpolation by
61      exf works with the geographical coordinates on XC/YC/XG/YG.
62      Naturally, this feature does not work with all packages, so some
63      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
64      profiles), because there the coordinates are assumed to be regular
65      spherical grid coordinates.
66    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
67      - introduce isopycnal diffusion coefficient control.
68    o tools/adjoint_options:
69      - additional control vector components.
70    o pkg/mnc: have mnc create marginally meaning full coordinate variables
71      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
72    o pkg/mypackage:
73      - add example of read/write pickup for state-var ;
74      - add entry points to the main code for state-vars diags & write-pickup.
75    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
76      transitions for useExfYearlyFields
77      - add new subroutine that determines the file to read from for
78        use*YearlyFields = .TRUE. and .FALSE.
79      - add a verification experiment to global_with_exf that tests
80        useExfYearlyFields with USE_EXF_INTERPOLATION defined
81    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
82      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
83      subroutines (which could be generated from a template, because they are
84      almost identical), for now they are included in obcs_prescribe_read.F for
85      simplicity
86    o pkg/exf:
87      - add a little more diagnostic to exf_interp_read (in analogy to
88        mds_read_field, can be turned off with debugLevel < debugLevA=1)
89      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
90        ugly but fast by unrolling short inner loops, inserting a unroll=8
91        directive in routine lagran, and splitting a loop and making do while the
92        outermost loop (the latter requires the intoduction of index arrays)
93    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
94    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
95      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
96    o verification/seaice_obcs: updated for restart test and latest options
97    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
98      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
99      for now this is only available for the C-grid code and also within
100      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
101    
102    checkpoint59m
103    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
104      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
105    o gad_som : fix flux output (& diagnostics) to have same units as other  
106      advection scheme fluxes (was previously multiplied by deltaT).  
107    o added verification/seaice_obcs both to test seaice open boundaries
108      and to provide an example matlab scrpt for generating them
109    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
110    o pkg/salt_plume: clean up salt_plume_frac.F to
111      remove redundancy in PlumeMethod 1 and 4
112    o pkg/kpp: added saltplume diagnostics
113    o pkg/obcs and pkg/seaice:
114      - do not set uice and vice to zero when OB*icefile are unspecified
115      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
116      - moved seaice tracer obcs after call to seaice_growth
117    o pkg/salt_plume: added various options for salt plume depth
118      criterion and for vertical distribution of the salt
119    
120    checkpoint59l
121    o pkg/ptracers: new version of ptracers pickup:
122      read meta file and write only fields which are needed to restart.
123      ( same logic as main pickup file ; also using pickupStrictlyMatch )
124    o pkg/seaice:
125      - add timescale for melting due to warm mixed layer as a means of
126        setting SEAICE_availHeatFrac more conveniently
127      - add a CPP-flag/runtime parameter check for flooding algorithm
128      - reformulated availHeat in seaice_growth.F to be independent of AREA
129    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
130      unit changes
131    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
132    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
133      SX vector computer.
134    o pkg/seaice:
135      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
136        seaice forcing fields can now be read only through pkg/exf
137      - removed some unused halos
138    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
139    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
140      or U/VICE from U/VWIND before computing U/VSTRESS
141    
142    checkpoint59k
143    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
144      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
145    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
146      all experiments pass when compile with un-initialised var. checking option.
147    o added pkg/salt_plume
148    o script to test restart (for now, in MITgcm_contrib/jmc_script)
149    o pkg/seaice: new read/write pickup version.
150      read meta file and write only fields which are needed to restart.
151      ( same logic as main pickup file ; also using pickupStrictlyMatch )
152    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
153    o lab_sea.hb87: modify the domain & update output.hb87.txt :
154      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
155      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
156      process. Fixed here by closing the domain at the Northern boundary.
157    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
158    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
159      a set of consecutive levels in/from a 3-D array.
160    o pkg/ptracers:
161      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
162      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
163    
164    checkpoint59j
165    o in pkgs: dic, obcs, offline, rbcs:
166      standard way to compute coeff. for time interpolation between 2 time reccords
167      which retains full precision (& make results less dependent on compiler).
168      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
169    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
170      packages instead of reading ice cover and wind speed separately
171    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
172     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
173      to allow to compile customized code before the update)
174    o cleaning-up:
175      - fix CPP instruction syntax in pkg/obcs
176      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
177        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
178      - fix some threads issue in IO parts.
179    o pkg/dic:
180      - add tons of "_d 0" (--> much better testreports !)
181       and then update outputs of tutorial_global_oce_biogeo
182    o pkg/mom_fluxform:
183      add a special version of momentum advection intended to conserve momentum
184      next to a bathymetry step or a coastline edge. (default = off = #undef)
185    o new read/write pickup version:
186      - for now, only implemented for main (mdsio) pickup file.
187      - write out only what is needed to restart; merge pickup_nh , pickup_ph
188        and main pickup together.
189      - read meta file; read only what is needed to restart; stop if a field
190        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
191        if it make sense (even if the restart is not perfect).
192      - if no meta file, assume that pickup to read corresponds exactly to
193        a pickup that would currently be written.
194      - read pickup written in the old format (until checkpoint59i) if it
195        recognizes an old meta file (no field-list).
196      - add a meta file in exp. which starts from a pickup: 2 cases:
197        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
198         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
199        b) a meta file describing the content of the associated pickup file
200         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
201    o pkg/mdsio & pkg/rw:
202      - new routine to read a meta file ; new set of routine to read
203        Multiple-fields file (with meta file).
204    o added open boundary conditions capability for seaice
205        HSNOW, HSALT, UICE, and VICE
206    
207    checkpoint59i
208    o adjoint:
209      * fix multiDimAdvection adjoint
210        (partial recomputation problem by TAF for fVerT(:,:,kDown)
211        and comlev1 size definition (maxpass vs. max. number of tracers)
212      * verification/global_ocean.90x45x15 adjoint now tests
213        NLFS and multiDimAdvection using DST3 (=30)
214      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
215    o pkg/kpp: add "_d 0" to real constant (if missing);
216      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
217      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
218    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
219      for internal parameters related to restart process (formerly from PARAMS.h)
220      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
221    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
222      as argument. (only atm2d & obcs write_pickup have not yet been updated)
223    o pkg/monitor:
224      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
225      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
226      - account for deep Atmosphere factor and density factor (anelastic)
227    o added open boundary conditions capability for seaice HEFF and AREA
228    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
229      thermodynamics
230      - requires a little reorganization, which affects the testreport results
231        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
232        so that now the conservative form is tested
233      - add a few comments
234    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
235    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
236    o add new diagnostics to seaice: advective, diffusive fluxes (only for
237      multidim-advection, for scheme 2 they are not filled) and transports,
238      thermodynamic growth rates
239    o change units of EmPmR (inside the code, + within coupling interface)
240      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
241      Affects results @ truncation level (cg2d match) and update output of
242       experiments: lab_sea(6), global_ocean.90x40x15(10),
243      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
244      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
245      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
246      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
247    
248    checkpoint59h
249    o pkg/exf:
250      - improve vectorization by moving if-statement out of loops in
251        exf_mapfields, exf_radiation
252      - exf_bulkformulae.F: introduce 2D fields and vectorize code
253    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
254    o testreport:
255      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
256        monitor & update offline_exf_seaice exp. output.
257      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
258    o pkg/seaice:
259      - bug fix in the evp solver: boundary conditions were affected be
260        masking of zMax/zMin (changes results)
261      - minor bug fix in boundary conditions in seaice_calc_strainrates
262        (changes results for no_slip)
263      - seaice_lsr.F: make interpolation of eta dependent on boundaries
264      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
265      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
266        stress formulation and no-slip boundary conditions
267    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
268      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
269    o pkg/seaice: a first HSALT time stepping equation has been checked in
270    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
271      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
272      without requiring DO-IF statements
273    o pkg/thsice:
274      use continuous power-law function for partition of energy between lateral
275      melting/freezing and thinning/thickening ; old code using step function
276      still available with #undef THSICE_FRACEN_POWERLAW
277      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
278    o testreport: change AD testing : check against results/output_adm.txt
279      using same scripts as for forward test.
280    
281    checkpoint59g
282    o adjoint testing: in preparation for changing testreport:
283      - output format: cost and grad written on separated lines
284      - ad output results in directory "results" (instead of "results_ad")
285    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
286    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
287    o pkg/ecco: allow user defined cost function contributions
288    o testreport:
289      Allow to choose (per experiment) the list of tested output variables
290       and the main variable (used to issue a pass/FAIL ) ;
291      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
292      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
293      Also modify printing of summary:
294       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
295       b) echo the list of tested variables in the individual summary.txt of
296          each experiment.
297    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
298      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
299      (but still depend on the tile decompostion of the domain).
300    o pkg/seaice: change a discretization detail to make the B-grid code
301      "more symmetric". This change is likely to remove all "ridges/leads" that
302      where quasi-aligned with the grid in B-grid solutions. It may also be
303      the solution to the stress coupling issues with the B-grid.
304    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
305      remove .cvsignore from input dir. (since testreport no longer run here).
306    o pkg/thsice:
307     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
308     - fix reshaping of sea-ice just after advection:
309       melt all the ice only if ice-volume is too small.
310     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
311       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
312     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
313    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
314      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
315    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
316      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
317      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
318      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
319      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
320      -> update output.txt
321    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
322     this affects truncation error: -> update output.txt of exp:
323      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
324      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
325    
326    checkpoint59f
327    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
328    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
329      a bounded range (in forward mode)
330    o pkg/ecco, ctrl, autodiff and mom_common:
331     internal parameter controls, completements of implementations
332    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
333    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
334      (not seem any difference in testing results).
335    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
336       at face corners.
337    o pkg/generic_advdiff:
338     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
339      loop range indices for computing vertical advection tendency
340      and do the calculation in the interior only (no overlap) ;
341      for now, only implemented for SOM advection (to save CPU time).
342     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
343    o exch2 adjoint
344      First set of changes:
345      - add exch2 hand-written adjoint templates
346      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
347        This will require cleanup in pkg/autodiff/*.F
348        (changed routines currently kept separate in verif. code/)
349      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
350        that used to hide exch2 or cubed-sphere specific code
351        (commented via 'cph-exch2')
352    o pkg/seaice
353      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
354    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
355       output of global_ocean.cs32x15.thsice .
356    
357    checkpoint59e
358    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
359      for B-grid vector (not yet tested) and C-grid vector (<- only used
360      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
361    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
362      (#ifdef ALLOW_SALT_PLUME)
363    o gather_2d/scatter_2d: removed halo regions
364    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
365      scheme and the corresponding test case (under front_relax dir). For now,
366      only available with Skew-flux form and not yet tested in realistic set-up.
367      adjoint: store directives updated, but gradient checks deteriorated,
368      so maybe GM/Redi adjoint is now broken.
369    o seaice adjoint
370      * add AREA, HEFF, HSNOW as control variable
371        (should not change lab_sea results)
372      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
373    o pkg/seaice:
374      * added computation of saltFlux in seaice_growth;
375        For time being, sea ice salinity is assumed constant
376        contribution of snow flooding to freshening of sea ice is neglected.
377        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
378        defaults to 0.0 in order to maintain backward compatibility.
379        Typical values for SEAICE_salinity are 4 to 10 g/kg.
380      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
381      * added SEAICE_availHeatFrac, which specifies fraction of surface level
382        heat content used to melt or grow ice
383      * commented out cap of HICE: it helps keep ice thinner
384      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
385      * applied OBCS T/S mask to HEFFM sea ice mask
386    
387    checkpoint59d
388    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
389     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
390     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
391    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
392     and change default value of parameter "GM_Small_Number";
393     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
394       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
395       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
396    o pkg/ecco: cost function when applying pkg/smooth to controls
397    o pkg/ctrl: add forcingPrecond run time parameter
398    o pkg/seaice:
399     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
400     - fix bug in metric terms of u-equation in LSR solver (implicit part),
401       changes verification/lab_sea
402     - rearrange implicit part of u-equation in LSR solver to make it easier to
403       read, understand, and debug. This causes changes at the truncation level.
404     - fix (serious) bug in the boundary conditions (sign error in the implicit
405       part) of the LSR solver. Changes all LSR results.
406     - fixed problem with HSNOW initialization to avoid thick snow when AREA
407       is initilized with small values - does not change lab_sea results.
408     - added HsnowFile initialization capability
409    o pkg/smooth: addition to model/src and pkg/ctrl so allow
410     initialization of pkg/smooth and application to control vector
411    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
412    o dependencies: pkg/profiles requires pkg/cal
413    o pkg/profiles:
414     - added option ALLOW_PROFILES_GENERICGRID
415         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
416         that interpolation information (grid points and coefficients) is provided
417         within the netcdf input files.
418         -> sample matlab scripts can be found in MITgcm_contrib/gael
419         that allow you to prepare netcdf input files.
420     - also modified: cleaner include statements, cleaner error print statements,
421       cleaner stops when error, and more tests of the netcdf input files consistency.
422    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
423    o pkg/seaice:
424     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
425       requires a new routine: seaice_diagnostics_fill.F
426     - make sure that seaice does not move if not forced (pressure replacement
427       method, Hibler and Ip, 1995), changes results
428     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
429     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
430       It is turned off by default (=-1.), because it changes the results.
431     - make it possible to read AREA from a file, too.
432    
433    checkpoint59c
434    o add S/R and diagnostics for oceanic mixed-layer depth
435    o move GMRedi call after all vertical mixing schemes (including KPP)
436    o pkg/thsice:
437     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
438      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
439    o pkg/obcs:
440     - bug fix for balance code
441    o pkg/seaice:
442      - allow values of SEAICE_elasticParm > 1
443      - add new parameter SEAICE_evpTauRelax as an alternative
444        to SEAICE_elasticParm
445      - make lsr boundary conditions free slip (by default), changes result
446      - add code for no slip boundary conditions for lsr
447      - set minimum of zeta to zero (and not 4e8) (changes results)
448      - add a cap on AREA after advecting AREA if seaice_growth is not called
449    o change calculation of Visbeck K:
450      - no longer depend on tapering scheme; instead, compute slope (limited
451        by GM_maxSlope). this is equivalent to what was comuted before with
452        clipping or linear tappering.
453      - fix vertical averaging (wrong by 1/2 level)
454      - leave the old version (but will not be maintained) within
455        #ifdef OLD_VISBECK_CALC / #endif
456      - update output of exp. ideal_2D_oce
457    o change error catch in calc_r_star to improve vectorization
458    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
459      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
460    o adjoint:
461      Re-organized adjoint checkpointing according to Matt Mazloff
462      (but with modifs/completions/cleanups)
463      Storing is now bundled into large arrays to optimized I/O
464      (and second step in cleanup of the_main_loop)
465    
466    checkpoint59b
467    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
468      - export/import (between ocean & coupler) fields needed for ocean DIC.
469    o pkg/seaice:
470      - get rid of three more exchanges seaice_calc_viscosities (required
471        different loop boundaries in seaice_lsr and seaice_ocean_stress)
472      - bug fix in seaice_ocean_stress (update of lab_sea required)
473      - reduce loop boundaries to necessary minimum also in seaice_evp
474      - go back to the old way of computing deltaC/Z as the adjoint likes that
475        better
476    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
477      passive tracer to an Age Tracer) + update output.txt
478    o pkg/exf:
479      - implement A-grid / C-grid selection for wind-stress input files.
480      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
481      for now, in exf_bulk_largeyeager04.F only :
482      - change implementation for case where windspeed + 2. components wind-stress
483        are read-in. AND use rhoConstFresh to convert evap.
484    o pkg/seaice:
485      - use correct EXCH_UV for wind-forcing (on A-grid).
486      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
487        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
488    o pkg/exf:
489      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
490      EXF_INTERPOLATION:
491      - merge global_with_exf/code version of exf_interp_read.F
492        to the main code ;
493      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
494        reading the file ; Important: This options needs to be defined to recover
495        previous code.
496        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
497      - no longer loose real*8 precision along the way when using exf_iprec=64.
498    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
499      - change discretisation of evp-solver in order to avoid another exchange
500        (changes lab_sea) and clean up a little
501      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
502        help the adjoint (this also changes the results slightly)
503      - add a few "_d 0" where they had been missing in seaice_evp.F
504      - cleaning up: remove unused seaice_calc_rhs.F
505    o pkg/exf: some cleaning-up:
506      - change various "constants" into runtime parameters
507      - cleaned-up Large&Yeager04 routine which should eventually
508        replace exf_bulkformulae.F (changed names of S/R and CPP)
509        and merged various ALLOW_ATM_WIND options
510     only used with thsice pkg (in thsice_get_exf.F):
511      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
512        which are used when useStabilityFct_overIce=TRUE (= the default)
513      - change default values of ice & snow emissivity and scale downward LW
514        by ice & snow emissivity.
515    o pkg/thsice:
516     fix few little problems, in thsice_calc_thickn.F:
517      - growth vertically (and not laterally) if iceFrac == iceMaskMax
518      - melt only laterally if hIce < hThinIce (as the comments say)
519      and in thsice_extend.F:
520      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
521      - start to form ice as soon as the minimum ice-volume is reachable.
522     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
523      and cpl_aim+ocn
524    o pkg/kpp
525     - move computation of surface related input fields to KPP into a new
526       subroutine kpp_forcing_surf.F
527     - remove wrong (within bi,bj loops) EXCH calls.
528     - little cleaning (add argument myThid in last position, cvs header ...)
529     - for now, fix conservation problem by exchanging KPPviscAz (may not
530       be the best fix)
531    o pkg/seaice
532     - check for inconsistent evp parameter/cpp-flag combination
533     - remove leftover errIO flat for obsolete name list error handling
534    o OpenAD
535     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
536    
537    checkpoint59a
538    o pkg/seaice: some parameter clarifications and a little bit of clean up
539    o pkg/thsice: rename run-time parameters:
540       himin       -> hIceMin
541       himin0      -> hThinIce
542       hihig       -> hThickIce
543       i0          -> i0swFrac
544       transCoef   -> bMeltCoef
545       frac_energy -> fracMelting
546      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
547       with default values (for now) that do not change the results.
548      remove old version of thsice vars advection in pkg/seaice.
549    o in FFIELDS.h:
550      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
551      - make pLoad & sIceLoad always available (but still only used if
552         ATMOSPHERIC_LOADING is #define).
553    o pkg/kpp: replaced _KPP_RL with _RL
554    o bug fixes for vertical diffusivity computations when both KPP and
555        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
556        are no longer updating the vertical diffusivity array
557        (passed as argument) but are (re-) setting those arrays.
558    o pkg/seaice: fix bug in evp solver, while doing that
559      - change (improve?) discretization of stress computations for both
560        cgrid-lsr and evp solver
561      - add a new routine to compute strain rates
562      - the above changes lab_sea results
563      - add no slip conditions for evp solver (off by default), lsr-version
564        may follow
565      - fix exchange for shear at Z-points (does not change lab_sea)
566      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
567        (to force the user to pick a time step since there is not "safe" way
568        of choosing it)
569      - add principal stress diagnostics
570      - rearrange fields for evp a little to avoid having to call a: too many
571        exchanges and b: exchanges for stress trensor components which we do
572        not have.
573      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
574        of evp, complete rewrite for lsr case (latter is does not yet work
575        in all cases)
576    o pkg/kpp: add code to have mixing in shelf ice caverns
577      - add myThid to all kpp routines (long overdue)
578    
579    checkpoint59
580    o pkg/exf:
581      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
582        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
583      - move exf header files from lower_case.h to UPPER_CASE.h ;
584        add missing cvs Header & Name
585      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
586      - add namelist param. selectStressGridPosition, exf_monFreq
587      - retire many _CLIM routines, and remove data.exf_clim
588        + params moved to data.exf
589        + climsst, climsss now handled by exf_set_gen, i.e.
590          climss?period=0 refers to constant field,
591          climss?period=-12 to monthly forcing
592      - split up namelists in data.exf
593    o pkg/seaice:
594      - remove seaice_exch and seaice_exch_uv
595      - remove superfluous exchange of theta
596      - add myThid to seaice_budget_ocean/ice
597      - add new interface for atmospheric wind forcing (C-grid only)
598        + new routine
599        + two new field (taux, tauy for stress over ice)
600        + removed one global field (DAIRN) for C-grid case only
601    o pkg/thsise
602      - 2nd set of modifs for thsice adjoint in conjunction with exf
603    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
604    
605    checkpoint58y_post
606    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
607      vertical diffusivity, similar to that in MOM4; turned on using
608      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
609      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
610    o Added capability for 3D specification of background vertical diffusion
611      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
612      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
613      "data" file that contains the 3D vertical diffusivity coefficients.
614    o ice dynamics (pkg/seaice) with thsice thermodynamics:
615      - add code within pkg thsice to advect & diffuse sea-ice fields
616      similar to (and will replace) what has been added in  seaice_advdiff.F,
617      but: - conserving Mass, Heat & Salt.
618           - better when using non-linear advection scheme (not yet fully tested)
619           - can also be used in atmospheric set-up (for now, only the diffusion).
620    
621    checkpoint58x_post
622    o IO option for global-file compact format:
623      - add options when generating topology (utils/exch2/matlab-topology-generator)
624      - add I/O capability (pkg/mdsio).
625      - adapt utils/matlab/rdmds.m to read this format.
626      for now long-line format not yet supported by pkg/mdsio (& exch2).
627    o shelfice: add a few diagnostics
628    
629    checkpoint58w_post
630    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
631      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
632      (and replace horiVertRatio in NH code).
633      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
634                         and tutorial_plume_on_slope (sensitive to truncation)
635    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
636      directly to drive seaice model (C-grid only)
637    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
638     - reintroduce computation of wind from stress,
639     - compute tau (in exf_bulkformulae.F) from windstress averaged to
640       mass points to avoid tau = 0
641     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
642    o rdmnc.m: make it work with "global" files created with gluemnc
643    o rdmnc.m : some improvements in dealing with singleton dimension
644      (tested on all testreport mnc output files).
645    o genmake2: disable pkg/profiles if netcdf test fails.
646    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
647    o move call to cal_readparms up to make calendar parameters/variable available
648      to all packages
649    
650    checkpoint58v_post
651    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
652      useDynP_inEos_Zc tested.
653    o pkg/exf: changes to properly interpolate/mask/scale initial fields
654    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
655      and portions thereof.  See read_cs.txt for description and examples.
656    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
657      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
658      following the great-circle arc between those 2 points.
659    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
660      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
661    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
662     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
663     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
664     - still needs work (not working with some options ; efficiency to improve)
665       and serious testing.
666     - use this scheme for temperature & salinity in 2 advection test exp.:
667       advect_xy & advect_xz, respectively.
668    
669    checkpoint58u_post
670    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
671    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
672    o testreport: add option "-skipdir" to skip some test.
673    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
674      momentum calculation.
675    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
676    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
677      remove checkpoint.F and the_correction_step.F (no longer used);
678      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
679    o add option (linFSConserveTr) to correct for tracer source/sink due to
680      Linear Free surface
681    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
682    o pkg/thsice: fix reading mnc-pickups
683    
684    checkpoint58t_post
685    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
686    o pkg/mdsio:
687     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
688       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
689       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
690     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
691     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
692       either MDS_READ_FIELD or MDS_WRITE_FIELD )
693     - new S/R (to replace MDSWRITEMETA), which allows to write more
694       informations (variable names, time ...) to meta files.
695     - modify rdmds.m to give back the meta file content.
696    o pkg/diagnostics: change vertical interpolation to be safer, and more
697       flexible (define p-levels to interpolate to in data.diagnostics);
698      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
699       diagnostic pointer.
700    o pkg/seaice: more cleaning up of seaice_growth, added many comments
701    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
702    o fix multi-category seaice:
703     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
704       SEAICE_MULTICATEGORY
705     - fix short wave heat flux
706    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
707       and allow to use EVP solver. Change forward lab_sea: test both EVP
708       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
709    o Initial check-in of lab_sea adjoint
710      (very similar to natl_box_adjoint/code_seaice)
711      * used C-grid and EVP solver
712      * used KPP, GM/Redi
713      * uses inAdExact=.TRUE.
714      * gradient checks fail for both ADM and TLM
715        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
716        f.d. gradients actually seem more problematic than ADM, TLM gradients;
717        issue is related to forward mismatch between g77 an ifort
718    o pkg/seaice: overhaul of thermodynamics
719     - growth.F and groatb.F are replaced by new routine seaice_growth.F
720     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
721     - move a few global fields out of SEAICE.h into seaice_growth.F and
722       make them 2D (FICE/QNETO/ ...)
723     - remove FO (it is the same as QNETO)
724     - introduce a few local fields to avoid modifying external fields such
725       as atemp, etc.
726    
727    checkpoint58s_post
728    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
729      changed exf_set_gen.F so that
730        genperiod=0 means input file is one time-constant field and
731        genperiod=-12 means input file contains 12 monthly means
732    o CG2D: use pre-computed solver main-diagonal (stored in common block);
733      this affects truncation error ; generate new output file for exp. which
734      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
735        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
736        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
737        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
738        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
739        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
740    o start implementation of deep-atmosphere and anelastic formulation
741    o verification: remove 2nd copy of input files and use script "prepare_run"
742      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
743    o mom_common/vecinv/fluxform: fix a few initialisation isssues
744    o profiles: fix for multithreaded case
745    
746    o diagnostics: rename few diags:
747      s/'PRESSURE'/'RCENTER '/g
748      s/'TICE    '/'oceFreez'/g
749      s/'TAUX    '/'oceTAUX '/g
750      s/'TAUY    '/'oceTAUY '/g
751      s/'SWFLUX  '/'oceQsw  '/g
752      s/DIFx/DFxE/g
753      s/DIFy/DFyE/g
754      and add few ocean-forcing diagnostics:
755      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
756    o modifications to pkg/seaice/growth.F and budget.F, which change results of
757      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
758      as actual snow thickness.  It now refers everywhere to effective snow
759      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
760    
761    checkpoint58r_post
762    o modifications to pkg/seaice/growth.F, which change results of
763      lab_sea experiment: fixes pertain to melting snow over open water, to
764      masking EVAP under sea ice, and to using the correct AREA variable for
765      computations of EVAP, PRECIP, HSNOW, and GHEFF
766    o add ability to read bathy, salt, and theta using MNC (off by def)
767    o add flooding algorithm and advection of HSNOW for pkg/seaice;
768      both are turned off by default and do no change any results
769    o seaice advection with pkg/thsice: a step toward the use of non-linear
770      advection scheme, but #ifdef or commented out for now (requires more EXCH).
771    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
772      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
773      in natl_box (affects results @ truncation level: update output.txt)
774    o multi-threading and IO:
775      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
776      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
777        (needed to work with SingleCpuIO): tested in all verif. exp.
778    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
779      affects the results (but none of the verification test uses this scheme).
780    o Adding some pkg/diagnostics capability to pkg/seaice
781      (will certainly be subject to changes)
782    o ctrl: adding new control variables:
783      lwflux, lwdown, evap, snowprecip, apressure, runoff
784    
785    checkpoint58q_post
786    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
787      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
788      high_res_cube configuration by 4% on Columbia.
789    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
790      add (in global_with_exf/code) a version of EXF_INTERP_READ without
791      dynamical allocation (seems to work in multi-threaded).
792    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
793      single CPU io) so that TAF does not have to see EESUPPORT.h
794    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
795    
796    checkpoint58p_post
797    o obcs: stop if obcs is used with useCDscheme = .true.
798    o shelfice:
799     - fix a sign error so that no slip at shelfice interface works
800     - remove stop for combination non-hydrostatic code and shelfice. That does
801       not mean, that the results are correct, but at least they are numerically
802       stable
803    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
804    o added adjoint exch routined for all exch*3d* routines
805      and updated flow directives
806    
807    checkpoint58o_post
808    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
809      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
810    o change controling S/R for writing pickup file (new S/R do_write_pickup)
811      and clean-up reading/writing of pickup files.
812    o fix local version of read/write pickup (NH part) in rotating_tank/code
813    o simplify EXCH interface:
814     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
815     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
816    o added the regrid package
817    o shelfice:
818     - add a simple boundary layer scheme to reduce noise
819     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
820    
821    checkpoint58n_post
822    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
823       local variable (not in common block).
824    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
825      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
826      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
827        to work with SingleCpuIO.
828    o add "_d 0" to real constant of pkg/cfc subroutines ;
829       update exp. cfc_exemple & tutorial_cfc_offline output files.
830    o multi-threading and IO:
831      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
832        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
833      - barrier before and after reading.
834      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
835      - avoid using MDS_WRITELOCAL for LAND pkg output.
836      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
837        common-block variables ; Allows multi-threading with master-thread IO.
838    o change default MAX_NO_THREADS from 32 to 4 ;
839      and stop cleanly when MAX_NO_THREADS is too small.
840    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
841    
842    checkpoint58m_post
843    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
844       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
845    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
846       keep global_ocean.90x40x15 (for AD testing) with former secondary test
847       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
848    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
849        add MITgcm_tutorials (= code + all the tutorials)
850    o ecco, option to compute cost for total ssh (mean+anom)
851    o consistent with addition of ptracer and ssh in pkg/profiles
852    o profiles: adding ptracer and ssh
853    o testreport: change multi-test output-file name
854      (from output.txt.{name} to output.{name}.txt)
855    o profiles: now ok for mutli-tiles case
856    o seaice: add 4 parameters for different advection schemes for area,
857      (effective) seaice thickness, enthalphy, and snow height. Their default
858      is the standard parameter SEAICEadvScheme
859    o calc_gw:
860     - add cosFacU in zonal viscous flux (harmonic.visc.).
861     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
862       of tutorial_plume_on_slope.
863    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
864    o calc_gw: true flux-form, account for horizontal grid spacing.
865      update rotating_tank results, but not plume_on_slope (affected at
866      truncation level, 11 digits).
867    
868    checkpoint58l_post
869    o calc_gw:
870     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
871     - remove side-drag for now (need to fix it); update plume_on_slope results.
872     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
873    o commit code to make SST/SSS weights spatially variable
874      (based on either variable in-situ or variable initial T/S weights)
875    o pkg/ecco:
876      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
877        now based on horizontally varying weights wthetaLev, wsaltLev
878      * cost_averagesflags now returns year indices in addition to day, month
879      * sflux balance is performed on annual basis
880        (sflxumm, sfluxmm2, bal_sfluxmm)
881      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
882        including separate counting and multipliers
883    o pkg/rbcs
884      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
885    
886    checkpoint58k_post
887    o testreport:
888     - always build in dir. "build" (if not there, mkdir build instead of building
889       & running in input)
890     - run in dir run (if it exists), in build otherwise.
891     - call prepare_run (if input/prepare_run exists)
892     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
893    o pkg/exf modifications to interpolation and rotation routines for more
894       reasonable treatment of North Pole singularity: for tracers North Pole
895       value is set to northernmost zonal-mean value, for zonal velocity it is
896       set to zero, and for meridional velocity it is set to northernmost value.
897    o pkg/exf/exf_check_range.F
898     - add tile index to diagnostics and move stop statement to the very
899       end of the routine.
900    o pkg/diagnostics: (diagnostics_main_init.F)
901      define title of isomorphic variables according to the current config.
902    o pkg/thsice with pkg/seaice dynamics:
903    - fix domain of computation (interior only, required for exf) and do exchanges
904    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
905    o towards a standard way of dealing with multi-threading in MONITOR
906      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
907    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
908       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
909    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
910    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
911    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
912       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
913    o tracer advection:
914     - clean-up and simplify calc_common_factors.F
915     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
916       advection subroutine (but still not used within DST advection S/R)
917    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
918    
919    checkpoint58j_post
920    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
921      from file (collects calls previously in FORWARD_STEP)
922    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
923    o adjoint store dir. adjusted accordingly
924    o genmake2
925      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
926    
927    checkpoint58i_post
928    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
929      on wind stress (SEAICEstressFactor defaults to 1.)
930    o Total number of Timers is finite (<=40): comment out 2 non-essential one
931      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
932    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
933      on CS-grid: no longer loosing mass.
934    o exf & curvilinear-grid: no longer modify longitude xC & xG.
935    o pkg/ggl90: fix sloppy output and fix a bug
936    o pkg/seaice: added SEAICEuseEVPpickup parameter
937      - Set to false in order to start EVP solver with
938        non-EVP pickup files when using SEAICEuseEVP
939      - fix sign error in diffusion in seaice_calc_rhs
940    
941    checkpoint58h_post
942    * Modifications for bottom topography control
943      o replace hFacC by _hFacC at various places
944      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
945      o add non-self-adjoint cg2d_nsa
946      o update autodiff support routines
947      o re-initialise hfac after ctrl_depth_ini
948      o works for 5x5 box, doesnt work for global_ocean.90x40x15
949    * Adding verification for 5x5 box (4-layer) bottom topography control
950    
951    checkpoint58g_post
952    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
953       used for mean seasonal cycle, mean diurnal cycle); add an example
954       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
955    o pkg/ggl90:
956      - add parameter (minimum surface kinetic energy)
957      - fix bug (avoiding division by zero)
958    o couple pkg/thsice to pkg/seaice:
959      - modify advection in seaice to accomodate new scalar fields to be advected
960      - only muliDimAdection scheme work with seaice/thsice
961      - mapping of thsice-variables to seaice-variables, back and forth
962      - does not break the verification experiments, but does not give the
963        desired results either
964    o pkg/seaice
965      - make (default) second order advection a bit less confusing?
966    
967    checkpoint58f_post
968    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
969      to pkg/seaice):
970      - new routines thsice_map_exf and thsice_get_exf provide the interface
971      - add an additional formal parameter to thsice_solve4temp
972    o pkg/exf:
973      - add new fields wspeed, snowprecip (to be able to couple to thsice)
974      - correct Stefan-Boltzmann constant
975      - new parameter for longwave surface emittance
976      - separate some stuff from exf_bulkformulae into new routines  
977        exf_radiation, exf_wind
978      - add new parameters and constants: longwave emissivity for ocean, ice
979        and snow, evaporation parameters over ice
980      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
981        either wind from stress or stress from wind
982    o pkg/thSIce:
983    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
984    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
985       and THSICE_CALC_THICKN
986    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
987    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
988      to make debugging easier.
989    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
990    o pkg/bulk_force:
991      - clean-up comments and parameters ;
992      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
993    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
994      generate new output for test-experiment: aim.5l_cs.thSI
995    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
996      testreport accordingly
997    
998    checkpoint58e_post
999    o SEAICE_CGRID adjoint done
1000    o R_STAR adjoint implemented.
1001      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
1002      * need to sort out init. of h0facc, etc.
1003    o Make pkg/profile fully independent of ecco,cost, etc. stuff
1004      to be able to use it in pure forward.
1005    
1006    checkpoint58d_post
1007    o upgrade simple test-experiment to tutorial example:
1008     step.1: duplicate the experiment and (step.2) will remove the old copy.
1009      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
1010      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
1011      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
1012      tutorial_global_oce_biogeo    <- copy of dic_example
1013      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1014      tutorial_plume_on_slope       <- copy of plume_on_slope
1015      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1016      tutorial_global_oce_optim     <- empty for now (David ?)
1017      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1018     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1019    o correct a sign problem in cost_scat.F
1020    o obcs and ptracers: fix boundary conditions for advections schemes
1021      with larger stencil
1022    o thsice adjoint: start
1023    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1024      completeness
1025    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1026      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1027    o ptracers adjoint:
1028      * avoid extensive recomputatations
1029      * fix missing re-init. of gptr (missed by TAF)
1030    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1031      me to turn off the excessive output to STDOUT that this package produces
1032    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1033      and add those terms in Vector-Invariant formulation.
1034    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1035      if the control period (xx_hfluxperiod etc) is 0
1036    o in profiles pkg, clean routines and fix details
1037    o in ecco pkg, reading ssh data:
1038      fix problem in case the model does not start at iter0=0
1039    o fix mnc-pickup/restart for ptracers
1040    o new package prifiles:
1041      code to compute profile-based cost by Gael Forget
1042      (modifs in ecco, ctrl, autodiff)
1043    o Benign bug fix in initialization (spotted by M. Mazloff) of
1044      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1045    
1046    checkpoint58c_post
1047    o adjoint: finish NLFS adjoint and provide reference output in
1048      verification/global_ocean.90x40x15/results_ad_nlfs
1049    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1050      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1051      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1052      with SEAICE_CGRID defined.
1053    o move calendarDumps from "data" to "data.cal" and clean-up the code
1054      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1055    o add useEXF & useCAL flags (for now, set in hard-coded way)
1056    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1057      (were missing in NH mode, and wrong in quasihydrostatic mode).
1058      waiting for Chris updated version of calc_gw to add those CALLs.
1059    o fix bug in quasihydrostatic S/R ;
1060      add a test for this option: global_ocean.90x40x15.qshyd
1061    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1062      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1063    o add on/off flag useOffLine for package OFFLINE
1064    o seaice:
1065      - modify advection so that it works also on the C-grid
1066      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1067        problem in multi-tile runs with C-grid
1068      - add flags for clipping ice velocities and/or masking solver forcing
1069      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1070        C-grid solver
1071      - added a few comments to seaice_diffusion.F
1072      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1073        are now exclusive)
1074      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1075        required re-ordering the code a little:
1076       + make DAIRN global variable (defined in SEAICE)
1077       + move computation of the viscosities eta and zeta into a new separate
1078         routine (because I need to recompute them in seaice_ocean_stress.F)
1079    
1080    checkpoint58b_post
1081    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1082      update output.txt of exp. aim.5l_cs.thSI
1083    o various mnc cleanups and improvements:
1084      + shrink lookup tables by factor of ~4
1085      + better error reporting when running out of lookup space
1086      + able to handle longer path/file names (up to 500 chars)
1087    o adjoint:
1088      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1089      - TBD: "hidden" mom_vecinv recomp. in dynamics
1090    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1091     (allow to differentiate between forcing components using new integer flags:
1092      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1093     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1094    o ecco
1095      - enable trend removal from SSH anomaly obs.
1096    o adjoint
1097      - a fix for PmEpR when #undef EXACT_CONSERV
1098      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1099      - try to fix "hidden" recomp. in forward_step for NLFS
1100        (NLFS seems broken sometimes after I checked it in)
1101    o seaice:
1102     - add c-grid version of the dynamic solver:
1103       + three new routines that are the c-grid substitute lsr, dynsolver
1104         and ostres
1105       + put a few fields that were local to dynsolver into global common
1106         blocks, so that I can move the computation of stresses etc into
1107         seaice_lsr (saves coding but may break the adjoint).
1108     - replace more hardwired parameters by runtime parameters
1109     - add ice masks that mask the rhs of the implicit solvers where there
1110       is no ice (commented out in seaice_dynsolver, because i am not sure
1111       if this works properly), eventually this should replace the clipping
1112       of ice velocities in seaice_dynsolver to +/-40cm/s.
1113    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1114      include it only where its needed
1115    o move balancing of fluxes before the call of external_forcing_surf
1116  o seaice:  o seaice:
1117    - correct units of turning angles (now they are really in degrees)    - correct units of turning angles (now they are really in degrees)
1118    - move computation of GWATX/Y out of main routine into dynsolver    - move computation of GWATX/Y out of main routine into dynsolver

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