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revision 1.569 by jmc, Wed Oct 12 02:13:40 2005 UTC revision 1.962 by mlosch, Wed Feb 27 04:35:59 2008 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o pkg/shelfice:
8      - sort out freshwater flux; convert freshwater fluxes to mass fluxes
9        (kg/m^2/s), does not break tests, because in verification/isomip,
10        rhoConstFresh=rhoConst (by accident)
11    o add a flag writePickupAtEnd (default=true) to be able to suppress
12      writing a pickup at the last timestep
13    o pkg/profiles:
14      rename profiles_interp_mean_genericgrid as profiles_interp_mean_gg
15      (for "less than 32 characters name" compiler requirement)
16    o pkg/obcs and pkg/exf: added capability to specify seaice open boundary
17      conditions that have a different sampling frequency than S/T/U/V obcs
18    o pkg/diagnostics (stats-diags):
19      - fix global Min/Max in case 1 processor get only empty tiles
20    o genmake2: replace (4 times)
21         make genmake_tc_1.o >> genmake_warnings 2>&1
22      with
23         COMM="$CC $CFLAGS -c genmake_tc_1.c"
24         echo $COMM >> genmake_warnings
25         $COMM >> genmake_warnings 2>&1
26      to make genmake2 always see the value of CC as specified in the optfile.
27    o generic_advdiff: - prather advection scheme (SOM) coded for CS-grid.
28      - add diagnostics for 1srt & 2nd Order moments and sub-grid variance.
29      - modify verification advect_cs test to test SOM-advection on CS-grid.
30    o pkg/ctrl:
31      - Rewrite of ctrl_map_ini_ecco.F,
32        introducing a generic routine (ctrl_map_ini_gen.F).
33      - Modification of ctrl_bound/adctrl_bound handling control vector bounds.
34    
35    checkpoint59n
36    o pkg/diagnostics: for large number of diagnostics, store diagnostic mate
37      number in dedicate array "hdiag":
38      - new version of S/R DIAGNOSTICS_ADD2LIST : DIAGNOSTICS_ADDTOLIST
39        with 1 more argument (mate number); modify old version DIAGNOSTICS_ADD2LIST.
40      - many small changes (integer format) for large number of diagnostics
41      - start to use DIAGNOSTICS_ADDTOLIST (necessary for diagnostics with
42        a counter mate) in pkg diagnostics, ptracers, thsice & aim_v23.
43    o add parameter rotateGrid and Euler angles EulerPhi/Theta/Psi. For
44      usingSphericalGrid, this allows to define the rotated grid coordinates
45      via phiMin/thetaMin/dxSpacing/dySpacing, etc., but then re-compute the
46      geographical coordinates according to the inverse of the rotation defined
47      by the Euler angles, so that Coriolis parameter and online-interpolation by
48      exf works with the geographical coordinates on XC/YC/XG/YG.
49      Naturally, this feature does not work with all packages, so some
50      combinations are prohibited in config_summary (flt, flt_zonal, ecco,
51      profiles), because there the coordinates are assumed to be regular
52      spherical grid coordinates.
53    o pkg/gmredi,ctrl,ecco,autodiff,grdchk and model/src,inc:
54      - introduce isopycnal diffusion coefficient control.
55    o tools/adjoint_options:
56      - additional control vector components.
57    o pkg/mnc: have mnc create marginally meaning full coordinate variables
58      (that is the grid indices) if usingCurvilinearGrid and NOT EXCH2
59    o pkg/mypackage:
60      - add example of read/write pickup for state-var ;
61      - add entry points to the main code for state-vars diags & write-pickup.
62    o pkg/exf: rewrite of exf_getffieldrec.F to properly deal with year
63      transitions for useExfYearlyFields
64      - add new subroutine that determines the file to read from for
65        use*YearlyFields = .TRUE. and .FALSE.
66      - add a verification experiment to global_with_exf that tests
67        useExfYearlyFields with USE_EXF_INTERPOLATION defined
68    o pkg/obcs/exf: add useOBCSYearlyFields (=.FALSE.) to obcs with exf in
69      analogy to useExfYearlyFields; rearrange obcs_prescribe_read: two new
70      subroutines (which could be generated from a template, because they are
71      almost identical), for now they are included in obcs_prescribe_read.F for
72      simplicity
73    o pkg/exf:
74      - add a little more diagnostic to exf_interp_read (in analogy to
75        mds_read_field, can be turned off with debugLevel < debugLevA=1)
76      - improve vectorizability of exf_interp for TARGET_NEC_SX, makes code
77        ugly but fast by unrolling short inner loops, inserting a unroll=8
78        directive in routine lagran, and splitting a loop and making do while the
79        outermost loop (the latter requires the intoduction of index arrays)
80    o pkg/obcs: replace obcs_apply_area/heff/hsalt/hsnow with obcs_apply_seaice
81    o pkg/seaice: moved DIFFERENT_MULTIPLE from seaice_model to seaice_dynsolver
82      http://forge.csail.mit.edu/pipermail/mitgcm-devel/2008-January/003173.html
83    o verification/seaice_obcs: updated for restart test and latest options
84    o pkg/seaice: add a new flag SEAICEuseTEM to use a slightly different
85      ice rheology (so-called truncated ellipse, that gets rid of tensile stress);
86      for now this is only available for the C-grid code and also within
87      #ifdef SEAICE_ALLOW_TEM, because this option may slow down the EVP code
88    
89    checkpoint59m
90    o pkg/seaice: use different time constant for melting (SEAICE_gamma_t)
91      and freezing (SEAICE_gamma_t_frz) ice due to mixed layer temperature
92    o gad_som : fix flux output (& diagnostics) to have same units as other  
93      advection scheme fluxes (was previously multiplied by deltaT).  
94    o added verification/seaice_obcs both to test seaice open boundaries
95      and to provide an example matlab scrpt for generating them
96    o added verification/lab_sea/input.salt_plume for testing pkg/salt_plume
97    o pkg/salt_plume: clean up salt_plume_frac.F to
98      remove redundancy in PlumeMethod 1 and 4
99    o pkg/kpp: added saltplume diagnostics
100    o pkg/obcs and pkg/seaice:
101      - do not set uice and vice to zero when OB*icefile are unspecified
102      - OBCS_SEAICE_AVOID_CONVERGENCE is undefined by default
103      - moved seaice tracer obcs after call to seaice_growth
104    o pkg/salt_plume: added various options for salt plume depth
105      criterion and for vertical distribution of the salt
106    
107    checkpoint59l
108    o pkg/ptracers: new version of ptracers pickup:
109      read meta file and write only fields which are needed to restart.
110      ( same logic as main pickup file ; also using pickupStrictlyMatch )
111    o pkg/seaice:
112      - add timescale for melting due to warm mixed layer as a means of
113        setting SEAICE_availHeatFrac more conveniently
114      - add a CPP-flag/runtime parameter check for flooding algorithm
115      - reformulated availHeat in seaice_growth.F to be independent of AREA
116    o change units attribute of EmPmR netcdf variables to kg/m^2/s to reflect recent
117      unit changes
118    o pkg/obcs: added OBCS_SEAICE_AVOID_CONVERGENCE constraint
119    o cg2d.F: add 3 compiler directives that speed up this routine by 30% on a NEC
120      SX vector computer.
121    o pkg/seaice:
122      - removed SEAICE_FFIELDS.h and seaice_get_forcing.F
123        seaice forcing fields can now be read only through pkg/exf
124      - removed some unused halos
125    o no longer write pickup from THE_MODEL_MAIN but always from FORWARD_STEP
126    o pkg/exf: added useRelativeWind EXF_PARAM.h option for subtracting U/VVEL
127      or U/VICE from U/VWIND before computing U/VSTRESS
128    
129    checkpoint59k
130    o pkg/seaice: ICE2WATR=SEAICE_rhoIce/rhoConst for consistency between
131      dynamics and thermodynamics. Set ICE2WATR=0.92 to reproduce older results.
132    o fix un-initialised variable problem (in mom_vecinv & shap_filt):
133      all experiments pass when compile with un-initialised var. checking option.
134    o added pkg/salt_plume
135    o script to test restart (for now, in MITgcm_contrib/jmc_script)
136    o pkg/seaice: new read/write pickup version.
137      read meta file and write only fields which are needed to restart.
138      ( same logic as main pickup file ; also using pickupStrictlyMatch )
139    o pkg/seaice: fix bug in seaice_ocean_stress (call of seaice_calc_strainrates)
140    o lab_sea.hb87: modify the domain & update output.hb87.txt :
141      lat-long grid & no-slip BC in seaice-dynamics produce different sigma12
142      at j=1 & j=Ny+1 : this case is not treated correctly in the restart
143      process. Fixed here by closing the domain at the Northern boundary.
144    o pkg/rw: cleaning-up: call directly new MDSIO S/R MDS_READ/WRITE_FIELD.
145    o pkg/mdsio: add new arguments to MDS_READ/WRITE_FIELD for reading/writing
146      a set of consecutive levels in/from a 3-D array.
147    o pkg/ptracers:
148      use a 2 characters string ioLabel to identify tracer (if more than 99 tracers).
149      to-do: fix pkg/diagnostics when large number of diagnostics are defined.
150    
151    checkpoint59j
152    o in pkgs: dic, obcs, offline, rbcs:
153      standard way to compute coeff. for time interpolation between 2 time reccords
154      which retains full precision (& make results less dependent on compiler).
155      update output of exp: tutorial_cfc_offline & tutorial_global_oce_biogeo.
156    o pkg/cfc: if compiled with exf and seaice, cfc now can use fields from those
157      packages instead of reading ice cover and wind speed separately
158    o split PTRACERS.h in 2 header files: PTRACERS_FIELDS.h & PTRACERS_PARAMS.h
159     (keep a temporary version of PTRACERS.h in verification/OpenAD/code_ad_openad
160      to allow to compile customized code before the update)
161    o cleaning-up:
162      - fix CPP instruction syntax in pkg/obcs
163      - replace (some) call to MDSIO S/R with call to RW interface S/R ; and
164        add #ifdef ALLOW_MDSIO elsewhere (allows to compile without pkg/mdsio)
165      - fix some threads issue in IO parts.
166    o pkg/dic:
167      - add tons of "_d 0" (--> much better testreports !)
168       and then update outputs of tutorial_global_oce_biogeo
169    o pkg/mom_fluxform:
170      add a special version of momentum advection intended to conserve momentum
171      next to a bathymetry step or a coastline edge. (default = off = #undef)
172    o new read/write pickup version:
173      - for now, only implemented for main (mdsio) pickup file.
174      - write out only what is needed to restart; merge pickup_nh , pickup_ph
175        and main pickup together.
176      - read meta file; read only what is needed to restart; stop if a field
177        is missing (if pickupStrictlyMatch=T, = the default) or try to restart
178        if it make sense (even if the restart is not perfect).
179      - if no meta file, assume that pickup to read corresponds exactly to
180        a pickup that would currently be written.
181      - read pickup written in the old format (until checkpoint59i) if it
182        recognizes an old meta file (no field-list).
183      - add a meta file in exp. which starts from a pickup: 2 cases:
184        a) minimal meta file (with just file precision) + pickupStrictlyMatch=F
185         e.g.: global_ocean.90x40x15/input/pickup.0000036000.meta
186        b) a meta file describing the content of the associated pickup file
187         e.g.: tutorial_global_oce_biogeo/input/pickup.0004248000.meta
188    o pkg/mdsio & pkg/rw:
189      - new routine to read a meta file ; new set of routine to read
190        Multiple-fields file (with meta file).
191    o added open boundary conditions capability for seaice
192        HSNOW, HSALT, UICE, and VICE
193    
194    checkpoint59i
195    o adjoint:
196      * fix multiDimAdvection adjoint
197        (partial recomputation problem by TAF for fVerT(:,:,kDown)
198        and comlev1 size definition (maxpass vs. max. number of tracers)
199      * verification/global_ocean.90x45x15 adjoint now tests
200        NLFS and multiDimAdvection using DST3 (=30)
201      * verification/lab_sea now tests multiDimAdvection using DST3 (=30)
202    o pkg/kpp: add "_d 0" to real constant (if missing);
203      update output of exp: natl_box (10.digits); vermix (std, 7.digits)
204      and lab_sea, 3.FW (only 6,4,6 digits match) & AD (8.digits).
205    o prepare for "clever pickup" implementation: add new header file "RESTART.h"
206      for internal parameters related to restart process (formerly from PARAMS.h)
207      and add startAB parameter to argument list of S/R ADAMS_BASHFORTH2.
208    o more standard interface to {PKG}_WRITE_PICKUP with pickup suffix passed
209      as argument. (only atm2d & obcs write_pickup have not yet been updated)
210    o pkg/monitor:
211      - use GLOBAL_SUM_TILE instead of _GLOBAL_SUM
212      - fix mon_stats_rs (statistics over the full domain, even where field is zero)
213      - account for deep Atmosphere factor and density factor (anelastic)
214    o added open boundary conditions capability for seaice HEFF and AREA
215    o pkg/shelfice: add option for convservative form of Hellmer&Olbers (1989)
216      thermodynamics
217      - requires a little reorganization, which affects the testreport results
218        of isomip.htd (only 7 digits of cg2d agree) => update/modify experiment,
219        so that now the conservative form is tested
220      - add a few comments
221    o add missing cvs Header: or Name: in eesupp/*, pkg/* & verification/code*
222    o add a little bit of code to gad_os7mp_adv_?.F to help vectorization
223    o add new diagnostics to seaice: advective, diffusive fluxes (only for
224      multidim-advection, for scheme 2 they are not filled) and transports,
225      thermodynamic growth rates
226    o change units of EmPmR (inside the code, + within coupling interface)
227      from m/s to kg/m2/s (mass flux) but leave input file unchanged.
228      Affects results @ truncation level (cg2d match) and update output of
229       experiments: lab_sea(6), global_ocean.90x40x15(10),
230      global_ocean.cs32x15(11x3,10), natl_box(11), tutorial_global_oce_latlon(11)
231      + adjoint results: global_ocean_ebm(11) and lab_sea (12).
232      Coupled set-up: allow to restart from previous pickups (cpl_oldPickup=T).
233      Next: will retire convertEmP2rUnit (simply using mass2rUnit instead).
234    
235    checkpoint59h
236    o pkg/exf:
237      - improve vectorization by moving if-statement out of loops in
238        exf_mapfields, exf_radiation
239      - exf_bulkformulae.F: introduce 2D fields and vectorize code
240    o pkg/kpp: added the salt plume scheme (ALLOW_SALT_PLUME) to KPP package
241    o testreport:
242      - allow to test for Qnet & SeaIce monitor output; clean-up ALLOW_BULK_OFFLINE
243        monitor & update offline_exf_seaice exp. output.
244      - AD testing: pass/FAIL according to Grad. output accuracy (instead of Cost)
245    o pkg/seaice:
246      - bug fix in the evp solver: boundary conditions were affected be
247        masking of zMax/zMin (changes results)
248      - minor bug fix in boundary conditions in seaice_calc_strainrates
249        (changes results for no_slip)
250      - seaice_lsr.F: make interpolation of eta dependent on boundaries
251      - replace hardcoded lower limit for zeta (zMin) by runtime parameter
252      - add a test to lab_sea, that tests the Hibler and Bryan (1987) ocean
253        stress formulation and no-slip boundary conditions
254    o pkg/ptracers: Temporary fix for PTRACERS_useGMRedi & PTRACERS_useKPP
255      in gad_calc_rhs.F ; add few safety stops in initialisation phase.
256    o pkg/seaice: a first HSALT time stepping equation has been checked in
257    o pkg/seaice: replaced maskW with seaiceMaskU and maskS with seaiceMaskV
258      in seaice_lsr.F; this solves the pkg/seaice-pkg/obcs problem
259      without requiring DO-IF statements
260    o pkg/thsice:
261      use continuous power-law function for partition of energy between lateral
262      melting/freezing and thinning/thickening ; old code using step function
263      still available with #undef THSICE_FRACEN_POWERLAW
264      update output of exp: aim.5l_cs.thSI, global_ocean.cs32x15.icedyn & .thsice
265    o testreport: change AD testing : check against results/output_adm.txt
266      using same scripts as for forward test.
267    
268    checkpoint59g
269    o adjoint testing: in preparation for changing testreport:
270      - output format: cost and grad written on separated lines
271      - ad output results in directory "results" (instead of "results_ad")
272    o pkg/seaice: adding ice salinity HSALT as a prognostic variable
273    o pkg/seaice: changes for using pkg/seaice with pkg/obcs
274    o pkg/ecco: allow user defined cost function contributions
275    o testreport:
276      Allow to choose (per experiment) the list of tested output variables
277       and the main variable (used to issue a pass/FAIL ) ;
278      - for now, done by adding the specific list in file: [exp]/input/tr_checklist
279      - default is unchanged: >cg2d< , (T,S,U,V,5 tracers)_[min,max,mean,StD] ;
280      Also modify printing of summary:
281       a) ">" NN "<" indicates the "main" variable (used for pass/FAIL)
282       b) echo the list of tested variables in the individual summary.txt of
283          each experiment.
284    o new S/R GLOBAL_SUM_TILE to compute global sum independently of number of
285      threads and number of processes (with #define GLOBAL_SUM_SEND_RECV)
286      (but still depend on the tile decompostion of the domain).
287    o pkg/seaice: change a discretization detail to make the B-grid code
288      "more symmetric". This change is likely to remove all "ridges/leads" that
289      where quasi-aligned with the grid in B-grid solutions. It may also be
290      the solution to the stress coupling issues with the B-grid.
291    o each tested exp: add a "run" directory with a standard ".cvsignore" file ;
292      remove .cvsignore from input dir. (since testreport no longer run here).
293    o pkg/thsice:
294     - cleaning: move common block out of "THSICE_2DYN.h" (removed) to "THSICE_VARS.h"
295     - fix reshaping of sea-ice just after advection:
296       melt all the ice only if ice-volume is too small.
297     - re-visit lateral/thinning repartition of melting (modifs from May 04, 2007):
298       prevent lateral melting if sea-ice fraction is too close to iceMaskMin ;
299     and update experiment global_ocean.cs32x15.icedyn (+start from pickup files).
300    o external_forcing_surf : extend the use of salt_EvPrRn & temp_EvPrRn (fresh-water
301      tracer content) to linFS or no RealFreshWaterFlux ; default remains unchanged.
302    o define mass2rUnit & rUnit2mass as units conversion factor, used for surface
303      forcing. mass2rUnit: from mass per unit area [kg/m2] to r-coordinate unit
304      (z-coord: =1/rhoConst ; p-coord: =gravity) ; rUnit2mass is just the reverse;
305      and remove horiVertRatio (& recip_horiVertRatio). Affects truncation error
306      of exp. global_oce_in_p: 10 16 16 14 16 13 16 16 16 13 13 13 16 13 13 12 16
307      -> update output.txt
308    o pkg/cd_code: add brackets in multiple terms sum (S/R CD_CODE_SCHEME):
309     this affects truncation error: -> update output.txt of exp:
310      global_ocean.90x40x15 (fw&adm), lab_sea (fw&adm) & lab_sea.lsr,
311      ideal_2D_oce, isomip.htd, natl_box, tutorial_global_oce_latlon.
312    
313    checkpoint59f
314    o pkg/autodiff: zero_adj resets an ajoint variable to zero (in adjoint mode)
315    o pkg/ctrl: ctrl_bound  forces parameter corrections to stay in
316      a bounded range (in forward mode)
317    o pkg/ecco, ctrl, autodiff and mom_common:
318     internal parameter controls, completements of implementations
319    o add few EXCH S/R (UV_BGRID, UV_DGRID, SM) for B & D-Grid velocity & 2nd Moment Sxy.
320    o use UV_BGRID exch for dxV,dyU: for now, only with pkg/exch2 & forward ;
321      (not seem any difference in testing results).
322    o pkg/cd_code: use the right EXCH calls (for CS-grid); but problem remains
323       at face corners.
324    o pkg/generic_advdiff:
325     - in GAD.h, define as parameters (iMinAdvR,iMaxAdvR,jMinAdvR,jMaxAdvR)
326      loop range indices for computing vertical advection tendency
327      and do the calculation in the interior only (no overlap) ;
328      for now, only implemented for SOM advection (to save CPU time).
329     - add argument "withSigns" to S/R FILL_CS_CORNER_TR_RL (needed for SOM_xy moment)
330    o exch2 adjoint
331      First set of changes:
332      - add exch2 hand-written adjoint templates
333      - exch2 hand-written no longer use TAF-flag 'nownew_arg'
334        This will require cleanup in pkg/autodiff/*.F
335        (changed routines currently kept separate in verif. code/)
336      - Comment all relevant #ifndef ALLOW_AUTODIFF_TAMC
337        that used to hide exch2 or cubed-sphere specific code
338        (commented via 'cph-exch2')
339    o pkg/seaice
340      - Close southern and western boundaries for UICE/VICE when useOBCS=.TRUE.
341    o pkg/bulk_force: fix loading into Qsw of Short-Wave flux; and update
342       output of global_ocean.cs32x15.thsice .
343    
344    checkpoint59e
345    o exch2: new S/R that only use the cube-tracer (center-position) exchange:
346      for B-grid vector (not yet tested) and C-grid vector (<- only used
347      when option W2_USE_R1_ONLY in W2_OPTIONS.h is defined).
348    o starting implementation of Duffy et al. (GRL 1999) salt plume scheme
349      (#ifdef ALLOW_SALT_PLUME)
350    o gather_2d/scatter_2d: removed halo regions
351    o gmredi: add option (GM_taper_scheme='fm07') for Ferrari & McWilliams 2007
352      scheme and the corresponding test case (under front_relax dir). For now,
353      only available with Skew-flux form and not yet tested in realistic set-up.
354      adjoint: store directives updated, but gradient checks deteriorated,
355      so maybe GM/Redi adjoint is now broken.
356    o seaice adjoint
357      * add AREA, HEFF, HSNOW as control variable
358        (should not change lab_sea results)
359      * CTRL_OPTIONS.h needs new flag: CTRL_SET_OLD_MAXCVARS_40
360    o pkg/seaice:
361      * added computation of saltFlux in seaice_growth;
362        For time being, sea ice salinity is assumed constant
363        contribution of snow flooding to freshening of sea ice is neglected.
364        SEAICE_salinity is set in SEAICE_PARM01 of data.seaice and it
365        defaults to 0.0 in order to maintain backward compatibility.
366        Typical values for SEAICE_salinity are 4 to 10 g/kg.
367      * replaced dRf(1) with dRf(kSurface)*hFacC(kSurface) in seaice_growth.F
368      * added SEAICE_availHeatFrac, which specifies fraction of surface level
369        heat content used to melt or grow ice
370      * commented out cap of HICE: it helps keep ice thinner
371      * reintroduced cap of HEFF via MAX_HEFF and SEAICE_CAP_HEFF option
372      * applied OBCS T/S mask to HEFFM sea ice mask
373    
374    checkpoint59d
375    o standard name: {PKG}_DIAGNOSTICS_STATE to fill diagnostics array
376     for {PKG} state variables, and called from DO_STATEVARS_DIAGS.
377     (keep {PKG}_DIAGNOSTICS_FILL for non-state variables diagnostics)
378    o pkg/gmredi (gmredi_readparms.F): add some missing "_d 0"
379     and change default value of parameter "GM_Small_Number";
380     update output of exp: lab_sea (x2), cfc_example, global_ocean.90x40x15,
381       global_ocean.cs32x15 (x4), global_ocean_ebm, global_with_exf,  
382       tutorial_global_oce_biogeo, tutorial_global_oce_latlon
383    o pkg/ecco: cost function when applying pkg/smooth to controls
384    o pkg/ctrl: add forcingPrecond run time parameter
385    o pkg/seaice:
386     - replace ZMIN=4.e8 with ZMIN=0. in dynsolver.F as in C-grid code
387     - fix bug in metric terms of u-equation in LSR solver (implicit part),
388       changes verification/lab_sea
389     - rearrange implicit part of u-equation in LSR solver to make it easier to
390       read, understand, and debug. This causes changes at the truncation level.
391     - fix (serious) bug in the boundary conditions (sign error in the implicit
392       part) of the LSR solver. Changes all LSR results.
393     - fixed problem with HSNOW initialization to avoid thick snow when AREA
394       is initilized with small values - does not change lab_sea results.
395     - added HsnowFile initialization capability
396    o pkg/smooth: addition to model/src and pkg/ctrl so allow
397     initialization of pkg/smooth and application to control vector
398    o pkg/seaice: fix another bug in the LSR no-slip boundary conditons
399    o dependencies: pkg/profiles requires pkg/cal
400    o pkg/profiles:
401     - added option ALLOW_PROFILES_GENERICGRID
402         -> pkg/profiles can thus be used with any grid (e.g. cs32x15) assuming
403         that interpolation information (grid points and coefficients) is provided
404         within the netcdf input files.
405         -> sample matlab scripts can be found in MITgcm_contrib/gael
406         that allow you to prepare netcdf input files.
407     - also modified: cleaner include statements, cleaner error print statements,
408       cleaner stops when error, and more tests of the netcdf input files consistency.
409    o additional test (in global_ocean.cs32x15) using seaice+thsice pkgs.
410    o pkg/seaice:
411     - move seaice-diagnostics from seaice_do_diags to do_statevars_diags; this
412       requires a new routine: seaice_diagnostics_fill.F
413     - make sure that seaice does not move if not forced (pressure replacement
414       method, Hibler and Ip, 1995), changes results
415     - and new damping criterion for EVP solver according to Hunke, JCP, 2001
416     - SEAICE_evpDampC = > 0. turns it on (615. is the recommended value).
417       It is turned off by default (=-1.), because it changes the results.
418     - make it possible to read AREA from a file, too.
419    
420    checkpoint59c
421    o add S/R and diagnostics for oceanic mixed-layer depth
422    o move GMRedi call after all vertical mixing schemes (including KPP)
423    o pkg/thsice:
424     - ensure iceMask > iceMaskMin : this problem appeared after May-04 modifs
425      (melt only laterally if thin ice): update output of global_ocean.cs32x15.thsice
426    o pkg/obcs:
427     - bug fix for balance code
428    o pkg/seaice:
429      - allow values of SEAICE_elasticParm > 1
430      - add new parameter SEAICE_evpTauRelax as an alternative
431        to SEAICE_elasticParm
432      - make lsr boundary conditions free slip (by default), changes result
433      - add code for no slip boundary conditions for lsr
434      - set minimum of zeta to zero (and not 4e8) (changes results)
435      - add a cap on AREA after advecting AREA if seaice_growth is not called
436    o change calculation of Visbeck K:
437      - no longer depend on tapering scheme; instead, compute slope (limited
438        by GM_maxSlope). this is equivalent to what was comuted before with
439        clipping or linear tappering.
440      - fix vertical averaging (wrong by 1/2 level)
441      - leave the old version (but will not be maintained) within
442        #ifdef OLD_VISBECK_CALC / #endif
443      - update output of exp. ideal_2D_oce
444    o change error catch in calc_r_star to improve vectorization
445    o exf runoff and seaice: remove ALLOW_SEAICE from exf pkg files and
446      add #define ALLOW_RUNOFF in SEAICE_OPTIONS.h (when not using exf).
447    o adjoint:
448      Re-organized adjoint checkpointing according to Matt Mazloff
449      (but with modifs/completions/cleanups)
450      Storing is now bundled into large arrays to optimized I/O
451      (and second step in cleanup of the_main_loop)
452    
453    checkpoint59b
454    o coupler (pkg/atm_ocn_coupler, pkg/ocn_compon_interf, pkg/atm2d):
455      - export/import (between ocean & coupler) fields needed for ocean DIC.
456    o pkg/seaice:
457      - get rid of three more exchanges seaice_calc_viscosities (required
458        different loop boundaries in seaice_lsr and seaice_ocean_stress)
459      - bug fix in seaice_ocean_stress (update of lab_sea required)
460      - reduce loop boundaries to necessary minimum also in seaice_evp
461      - go back to the old way of computing deltaC/Z as the adjoint likes that
462        better
463    o Refresh of tutorial_global_oce_latlon (includes changing salinity-like
464      passive tracer to an Age Tracer) + update output.txt
465    o pkg/exf:
466      - implement A-grid / C-grid selection for wind-stress input files.
467      - clean-up exf_wind.F (remove us, use wspeed instead ; add wStress)
468      for now, in exf_bulk_largeyeager04.F only :
469      - change implementation for case where windspeed + 2. components wind-stress
470        are read-in. AND use rhoConstFresh to convert evap.
471    o pkg/seaice:
472      - use correct EXCH_UV for wind-forcing (on A-grid).
473      - change SEAICE_OPTIONS.h to limit the number of option combinations (regarding
474        SEAICE_EXTERNAL_FORCING & SEAICE_EXTERNAL_FLUXES); add corresponding stops.
475    o pkg/exf:
476      - default EXF options are now set in EXF_OPTIONS.h (ifndef ALLOW_AUTODIFF_TAMC)
477      EXF_INTERPOLATION:
478      - merge global_with_exf/code version of exf_interp_read.F
479        to the main code ;
480      - Add new option: EXF_INTERP_USE_DYNALLOC to use Dynamical Allocation when
481        reading the file ; Important: This options needs to be defined to recover
482        previous code.
483        otherwise, use fixed size array to read in (size=exf_interp_bufferSize).
484      - no longer loose real*8 precision along the way when using exf_iprec=64.
485    o pkg/seaice: rearrangement of common blocks (really needs more cleaning up)
486      - change discretisation of evp-solver in order to avoid another exchange
487        (changes lab_sea) and clean up a little
488      - replace SQRT(MAX(deltaC,SEAICE_EPS)) by MAX(SQRT(deltaC),SEAICE_EPS)
489        help the adjoint (this also changes the results slightly)
490      - add a few "_d 0" where they had been missing in seaice_evp.F
491      - cleaning up: remove unused seaice_calc_rhs.F
492    o pkg/exf: some cleaning-up:
493      - change various "constants" into runtime parameters
494      - cleaned-up Large&Yeager04 routine which should eventually
495        replace exf_bulkformulae.F (changed names of S/R and CPP)
496        and merged various ALLOW_ATM_WIND options
497     only used with thsice pkg (in thsice_get_exf.F):
498      - implement fixed turbulent transfert Coeff over ice (as in Large&Yeager04)
499        which are used when useStabilityFct_overIce=TRUE (= the default)
500      - change default values of ice & snow emissivity and scale downward LW
501        by ice & snow emissivity.
502    o pkg/thsice:
503     fix few little problems, in thsice_calc_thickn.F:
504      - growth vertically (and not laterally) if iceFrac == iceMaskMax
505      - melt only laterally if hIce < hThinIce (as the comments say)
506      and in thsice_extend.F:
507      - allow to form ice even when iceFrac == iceMaskMax (by increasing thickness)
508      - start to form ice as soon as the minimum ice-volume is reachable.
509     update output of test-exp: aim.5l_cs(thSI), global_ocean.cs32x15(thsice),
510      and cpl_aim+ocn
511    o pkg/kpp
512     - move computation of surface related input fields to KPP into a new
513       subroutine kpp_forcing_surf.F
514     - remove wrong (within bi,bj loops) EXCH calls.
515     - little cleaning (add argument myThid in last position, cvs header ...)
516     - for now, fix conservation problem by exchanging KPPviscAz (may not
517       be the best fix)
518    o pkg/seaice
519     - check for inconsistent evp parameter/cpp-flag combination
520     - remove leftover errIO flat for obsolete name list error handling
521    o OpenAD
522     - changed verification/OpenAD to full baroclinic setup (including GM/Redi)
523    
524    checkpoint59a
525    o pkg/seaice: some parameter clarifications and a little bit of clean up
526    o pkg/thsice: rename run-time parameters:
527       himin       -> hIceMin
528       himin0      -> hThinIce
529       hihig       -> hThickIce
530       i0          -> i0swFrac
531       transCoef   -> bMeltCoef
532       frac_energy -> fracMelting
533      add new parameters: hNewIceMax, fracFreezing, dhSnowLin
534       with default values (for now) that do not change the results.
535      remove old version of thsice vars advection in pkg/seaice.
536    o in FFIELDS.h:
537      - replace #ifndef ALLOW_EXF  by #ifndef EXCLUDE_FFIELDS_LOAD
538      - make pLoad & sIceLoad always available (but still only used if
539         ATMOSPHERIC_LOADING is #define).
540    o pkg/kpp: replaced _KPP_RL with _RL
541    o bug fixes for vertical diffusivity computations when both KPP and
542        3D diffusivity arrays are used; pkg/kpp/kpp_calc_diff_s & _t.F
543        are no longer updating the vertical diffusivity array
544        (passed as argument) but are (re-) setting those arrays.
545    o pkg/seaice: fix bug in evp solver, while doing that
546      - change (improve?) discretization of stress computations for both
547        cgrid-lsr and evp solver
548      - add a new routine to compute strain rates
549      - the above changes lab_sea results
550      - add no slip conditions for evp solver (off by default), lsr-version
551        may follow
552      - fix exchange for shear at Z-points (does not change lab_sea)
553      - retire SEAICEuseEVP, instead turn on EVP by setting SEAICE_deltaTevp
554        (to force the user to pick a time step since there is not "safe" way
555        of choosing it)
556      - add principal stress diagnostics
557      - rearrange fields for evp a little to avoid having to call a: too many
558        exchanges and b: exchanges for stress trensor components which we do
559        not have.
560      - modify Hibler+Bryan (1987) stress coupling so that it reuses information
561        of evp, complete rewrite for lsr case (latter is does not yet work
562        in all cases)
563    o pkg/kpp: add code to have mixing in shelf ice caverns
564      - add myThid to all kpp routines (long overdue)
565    
566    checkpoint59
567    o pkg/exf:
568      - fix wind-stress location: defined on A-grid (if ALLOW_ATM_WIND &
569        ALLOW_BULKFORMULAE or USE_EXF_INTERPOLATION), otherwise, defined on C-grid
570      - move exf header files from lower_case.h to UPPER_CASE.h ;
571        add missing cvs Header & Name
572      - add adjoint routines and flow dirs for newly used exch_uv_agrid routines
573      - add namelist param. selectStressGridPosition, exf_monFreq
574      - retire many _CLIM routines, and remove data.exf_clim
575        + params moved to data.exf
576        + climsst, climsss now handled by exf_set_gen, i.e.
577          climss?period=0 refers to constant field,
578          climss?period=-12 to monthly forcing
579      - split up namelists in data.exf
580    o pkg/seaice:
581      - remove seaice_exch and seaice_exch_uv
582      - remove superfluous exchange of theta
583      - add myThid to seaice_budget_ocean/ice
584      - add new interface for atmospheric wind forcing (C-grid only)
585        + new routine
586        + two new field (taux, tauy for stress over ice)
587        + removed one global field (DAIRN) for C-grid case only
588    o pkg/thsise
589      - 2nd set of modifs for thsice adjoint in conjunction with exf
590    o enable runtime flag useEXF (useCAL is set to .T. if useEXF=.T.)
591    
592    checkpoint58y_post
593    o Added capability for latitudinal dependence of Bryan and Lewis, 1979
594      vertical diffusivity, similar to that in MOM4; turned on using
595      #define ALLOW_BL79_LAT_VARY in CPP_OPTIONS.h and specified using
596      diffKrBL79*, diffKrBLEQ*, and BL79LatVary in runtime data file.
597    o Added capability for 3D specification of background vertical diffusion
598      coefficient.  This is done by (i) #define ALLOW_3D_DIFFKR
599      in CPP_OPTIONS.h and (ii) specifying file diffKrFile in runtime
600      "data" file that contains the 3D vertical diffusivity coefficients.
601    o ice dynamics (pkg/seaice) with thsice thermodynamics:
602      - add code within pkg thsice to advect & diffuse sea-ice fields
603      similar to (and will replace) what has been added in  seaice_advdiff.F,
604      but: - conserving Mass, Heat & Salt.
605           - better when using non-linear advection scheme (not yet fully tested)
606           - can also be used in atmospheric set-up (for now, only the diffusion).
607    
608    checkpoint58x_post
609    o IO option for global-file compact format:
610      - add options when generating topology (utils/exch2/matlab-topology-generator)
611      - add I/O capability (pkg/mdsio).
612      - adapt utils/matlab/rdmds.m to read this format.
613      for now long-line format not yet supported by pkg/mdsio (& exch2).
614    o shelfice: add a few diagnostics
615    
616    checkpoint58w_post
617    o p-coord. non-hydrostatic using reference profile for w <-> omega conversion:
618      rVel2wUnit & wUnit2rVel are computed from reference profile Tref,Sref
619      (and replace horiVertRatio in NH code).
620      Update output of exp.: tutorial_global_oce_in_p (useNHMTerms !)
621                         and tutorial_plume_on_slope (sensitive to truncation)
622    o seaice: if ALLOW_ATM_WIND is undefined use wind stress
623      directly to drive seaice model (C-grid only)
624    o exf: when input wind-stress (#undef ALLOW_ATM_WIND):
625     - reintroduce computation of wind from stress,
626     - compute tau (in exf_bulkformulae.F) from windstress averaged to
627       mass points to avoid tau = 0
628     - fix serious bug: (1/3) in Fortran is not the same as (1./3.)
629    o rdmnc.m: make it work with "global" files created with gluemnc
630    o rdmnc.m : some improvements in dealing with singleton dimension
631      (tested on all testreport mnc output files).
632    o genmake2: disable pkg/profiles if netcdf test fails.
633    o cpl_aim+ocn exp.: use consistent rhoConstFresh in Atm & Ocn; update output.
634    o move call to cal_readparms up to make calendar parameters/variable available
635      to all packages
636    
637    checkpoint58v_post
638    o change EOS (from POLY3 to JMD95P) in global_ocean.90x45x15 to get
639      useDynP_inEos_Zc tested.
640    o pkg/exf: changes to properly interpolate/mask/scale initial fields
641    o utils/matlab/cs_grid/read_cs: routines to speed up reading of CS510 fields
642      and portions thereof.  See read_cs.txt for description and examples.
643    o utils/matlab/cs_grid/bk_line: to compute transport through passages,
644      add a script (grt_circ_bkl.m) to generate broken-line between 2 points,
645      following the great-circle arc between those 2 points.
646    o trap un-initialized variable with pathscale compiler on weddell.mit.edu
647      (thanks to Constantinos): fix few problems and get (almost) all exp to pass.
648    o 2nd-Order Moment Advection Scheme (Prather, 1986): first check-in
649     - enable by setting #define GAD_ALLOW_SOM_ADVECT (in GAD_OPTIONS.h)
650     - used without limiter (AdvScheme=80) or with Prather limiter (AdvScheme=81)
651     - still needs work (not working with some options ; efficiency to improve)
652       and serious testing.
653     - use this scheme for temperature & salinity in 2 advection test exp.:
654       advect_xy & advect_xz, respectively.
655    
656    checkpoint58u_post
657    o new test-exp: fizhi-cs-32x32x40 (40 levels) to replace the 10 levels.
658    o move call to INI_FORCING from PACKAGES_INIT_VARIABLES to INITIALISE_VARIA.
659    o testreport: add option "-skipdir" to skip some test.
660    o exf: when input wind-stress (#undef ALLOW_ATM_WIND), by-pass turbulent
661      momentum calculation.
662    o gad_advection: fix vertAdvecScheme (if different from advectionScheme)
663    o some cleaning: usePickupBeforeC35 no longer supported ; remove this option.
664      remove checkpoint.F and the_correction_step.F (no longer used);
665      do the k loop inside CYCLE_TRACER (supposed to be more efficient).
666    o add option (linFSConserveTr) to correct for tracer source/sink due to
667      Linear Free surface
668    o pkg/seaice: fix a bug in the flooding algorithm: turn off the snow machine
669    o pkg/thsice: fix reading mnc-pickups
670    
671    checkpoint58t_post
672    o pkg/diagnostics: fix multi-threaded output (when singleCpuIO=F)
673    o pkg/mdsio:
674     - clean-up mdsio_readfield.F & mdsio_writefield_new.F and
675       move to new files: mdsio_read_field.F (S/R MDS_READ_FIELD) &
676       mdsio_write_field.F (S/R MDS_WRITE_FIELD);
677     - fix multi-threaded singleCpuIO option in MDS_WRITE_FIELD
678     - collect old S/R  in one file: mdsio_rw_field.F (now just a call to
679       either MDS_READ_FIELD or MDS_WRITE_FIELD )
680     - new S/R (to replace MDSWRITEMETA), which allows to write more
681       informations (variable names, time ...) to meta files.
682     - modify rdmds.m to give back the meta file content.
683    o pkg/diagnostics: change vertical interpolation to be safer, and more
684       flexible (define p-levels to interpolate to in data.diagnostics);
685      add argument to S/R DIAGNOSTICS_GET_POINTERS to catch the right
686       diagnostic pointer.
687    o pkg/seaice: more cleaning up of seaice_growth, added many comments
688    o pkg/exf: put runoff0 and runoff1 into the appropriate common block
689    o fix multi-category seaice:
690     - change cpp flag SEAICE_MULTILEVEL to more meaningful name:
691       SEAICE_MULTICATEGORY
692     - fix short wave heat flux
693    o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
694       and allow to use EVP solver. Change forward lab_sea: test both EVP
695       solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
696    o Initial check-in of lab_sea adjoint
697      (very similar to natl_box_adjoint/code_seaice)
698      * used C-grid and EVP solver
699      * used KPP, GM/Redi
700      * uses inAdExact=.TRUE.
701      * gradient checks fail for both ADM and TLM
702        due to sensitive snow melt code in seaice_grwoth (look for "JZ")
703        f.d. gradients actually seem more problematic than ADM, TLM gradients;
704        issue is related to forward mismatch between g77 an ifort
705    o pkg/seaice: overhaul of thermodynamics
706     - growth.F and groatb.F are replaced by new routine seaice_growth.F
707     - budget.F is replaced by two new routines seaice_budget_ocean/ice.F
708     - move a few global fields out of SEAICE.h into seaice_growth.F and
709       make them 2D (FICE/QNETO/ ...)
710     - remove FO (it is the same as QNETO)
711     - introduce a few local fields to avoid modifying external fields such
712       as atemp, etc.
713    
714    checkpoint58s_post
715    o pkg/exf: moved exf_init_runoff.F to exf_init.F and exf_set_gen.F
716      changed exf_set_gen.F so that
717        genperiod=0 means input file is one time-constant field and
718        genperiod=-12 means input file contains 12 monthly means
719    o CG2D: use pre-computed solver main-diagonal (stored in common block);
720      this affects truncation error ; generate new output file for exp. which
721      fails: exp4(12d), fizhi-cs-aqualev20(12d), front_relax(10d),
722        global_ocean.90x40x15(10d), global_ocean.cs32x15(10d).thsice(11d).viscA4(10d),
723        ideal_2D_oce(10d), internal_wave(09d), isomip.htd(11d), matrix_example(07d),
724        MLAdjust(4x11d,12d), natl_box(11d), rotating_tank(12d),
725        tutorial_global_oce_in_p(10d), tutorial_plume_on_slope(11d),
726        vermix(12d).ggl90(12d).my82(11d).opps(12d).pp81(11d)
727    o start implementation of deep-atmosphere and anelastic formulation
728    o verification: remove 2nd copy of input files and use script "prepare_run"
729      to make a symbolic link to the 1rst copy (reduce downloaded size by ~81.M)
730    o mom_common/vecinv/fluxform: fix a few initialisation isssues
731    o profiles: fix for multithreaded case
732    
733    o diagnostics: rename few diags:
734      s/'PRESSURE'/'RCENTER '/g
735      s/'TICE    '/'oceFreez'/g
736      s/'TAUX    '/'oceTAUX '/g
737      s/'TAUY    '/'oceTAUY '/g
738      s/'SWFLUX  '/'oceQsw  '/g
739      s/DIFx/DFxE/g
740      s/DIFy/DFyE/g
741      and add few ocean-forcing diagnostics:
742      atmPload, sIceLoad, oceQnet, oceFWflx, oceSflux, surForcT & surForcS
743    o modifications to pkg/seaice/growth.F and budget.F, which change results of
744      lab_sea experiment: HSNOW was sometimes treated as effective and sometimes
745      as actual snow thickness.  It now refers everywhere to effective snow
746      thickness, meaning that for non-zero AREA, actual thickness is HEFF/AREA.
747    
748    checkpoint58r_post
749    o modifications to pkg/seaice/growth.F, which change results of
750      lab_sea experiment: fixes pertain to melting snow over open water, to
751      masking EVAP under sea ice, and to using the correct AREA variable for
752      computations of EVAP, PRECIP, HSNOW, and GHEFF
753    o add ability to read bathy, salt, and theta using MNC (off by def)
754    o add flooding algorithm and advection of HSNOW for pkg/seaice;
755      both are turned off by default and do no change any results
756    o seaice advection with pkg/thsice: a step toward the use of non-linear
757      advection scheme, but #ifdef or commented out for now (requires more EXCH).
758    o use standard version of PTRACERS_INI_VARIA in tutorial_tracer_adjsens
759      (identical results) and the standard version of EXTERNAL_FIELDS_LOAD
760      in natl_box (affects results @ truncation level: update output.txt)
761    o multi-threading and IO:
762      - replace some call to MDSIO S/R by the corresponding READ/WRITE_FLD S/R.
763      - remove most of BEGIN_MASTER/ END_MASTER around READ/WRITE_FLD S/R calls
764        (needed to work with SingleCpuIO): tested in all verif. exp.
765    o GAD: use simpler DST3 formulation as default (old version left within #ifdef)
766      affects the results (but none of the verification test uses this scheme).
767    o Adding some pkg/diagnostics capability to pkg/seaice
768      (will certainly be subject to changes)
769    o ctrl: adding new control variables:
770      lwflux, lwdown, evap, snowprecip, apressure, runoff
771    
772    checkpoint58q_post
773    o added CPP_EEOPTIONS.h flag DISABLE_MPI_READY_TO_RECEIVE.  Speeds up
774      1/6-deg Southern Ocean configuration by 8% on IBM Datastar and
775      high_res_cube configuration by 4% on Columbia.
776    o clean-up multi-threaded problems (reported by debugger tcheck on ACES);
777      add (in global_with_exf/code) a version of EXF_INTERP_READ without
778      dynamical allocation (seems to work in multi-threaded).
779    o new function "MASTER_CPU_IO" (=T if master thread & master CPU, if using
780      single CPU io) so that TAF does not have to see EESUPPORT.h
781    o pkg/seaice: implement sea-ice loading (when using RealFreshWaterFlux)
782    
783    checkpoint58p_post
784    o obcs: stop if obcs is used with useCDscheme = .true.
785    o shelfice:
786     - fix a sign error so that no slip at shelfice interface works
787     - remove stop for combination non-hydrostatic code and shelfice. That does
788       not mean, that the results are correct, but at least they are numerically
789       stable
790    o diagnoctics: modify UVELPHI and VVELPHI to include hfac (i.e. mass-weighted)
791    o added adjoint exch routined for all exch*3d* routines
792      and updated flow directives
793    
794    checkpoint58o_post
795    o replace calls to EXCH_Z & EXCH_UV_AGRID: use the new _3D_ version ;
796      remove old subroutines (_XY_ & _XYZ_); update the adjoint version.
797    o change controling S/R for writing pickup file (new S/R do_write_pickup)
798      and clean-up reading/writing of pickup files.
799    o fix local version of read/write pickup (NH part) in rotating_tank/code
800    o simplify EXCH interface:
801     - change _XYZ_ interface to _3D_ subroutine (with 3rd dim in argument list)
802     - not often used EXCH S/R (exch_z, exch_uv_agrid): keep only the _3D_ version
803    o added the regrid package
804    o shelfice:
805     - add a simple boundary layer scheme to reduce noise
806     - fix the indexing in shelfice_u/v_drag so that there will be actually drag
807    
808    checkpoint58n_post
809    o fix globalArea multi-threaded calculation: need to apply GLOBAL_SUM to
810       local variable (not in common block).
811    o lot of small changes for multi-threaded. Most tests (using OMP & ifort) pass.
812      - still problems with pkgs: mnc, exp2, dic, cal, exf (and probably more);
813      - still BEGIN_MASTER/END_MASTER to remove around READ/WRITE_FLD S/R calls
814        to work with SingleCpuIO.
815    o add "_d 0" to real constant of pkg/cfc subroutines ;
816       update exp. cfc_exemple & tutorial_cfc_offline output files.
817    o multi-threading and IO:
818      - all threads call READ_FLD S/R (needed if using SingleCpuIO):
819        (no BEGIN_MASTER/ END_MASTER around the call, but inside MDSIO S/R.
820      - barrier before and after reading.
821      - stop if other than master is calling MDS_WRITELOCAL (if #undef IO_THREAD_SAFE)
822      - avoid using MDS_WRITELOCAL for LAND pkg output.
823      - new S/R AIM_WRITE_PHYS (replaces AIM_WRITE_LOCAL) to write AIM physics
824        common-block variables ; Allows multi-threading with master-thread IO.
825    o change default MAX_NO_THREADS from 32 to 4 ;
826      and stop cleanly when MAX_NO_THREADS is too small.
827    o add S/R BAR_CHECK to check multi-threaded barrier synchronization
828    
829    checkpoint58m_post
830    o add a Non-Hydroatatic test (with 3-D Coriolis, NHMTerms, biharmonic Visc.
831       and side-drag) on CS-grid : global_ocean.cs32x15.viscA4
832    o make "tutorial_global_oce_latlon" from standard "global_ocean.90x40x15" exp.
833       keep global_ocean.90x40x15 (for AD testing) with former secondary test
834       (".qshyd") as the main test (mv output.qshyd.txt to output.txt)
835    o CVS modules: update MITgcm_verif_basic; remove MITgcm_verif_ocean & _verif_atmos;
836        add MITgcm_tutorials (= code + all the tutorials)
837    o ecco, option to compute cost for total ssh (mean+anom)
838    o consistent with addition of ptracer and ssh in pkg/profiles
839    o profiles: adding ptracer and ssh
840    o testreport: change multi-test output-file name
841      (from output.txt.{name} to output.{name}.txt)
842    o profiles: now ok for mutli-tiles case
843    o seaice: add 4 parameters for different advection schemes for area,
844      (effective) seaice thickness, enthalphy, and snow height. Their default
845      is the standard parameter SEAICEadvScheme
846    o calc_gw:
847     - add cosFacU in zonal viscous flux (harmonic.visc.).
848     - put back side-drag (call new S/R MOM_W_SIDEDRAG) and output.txt.
849       of tutorial_plume_on_slope.
850    o obcs_calc.F : fix index Pb in OBSeta & OBNeta (Thanks to Gianmaria).
851    o calc_gw: true flux-form, account for horizontal grid spacing.
852      update rotating_tank results, but not plume_on_slope (affected at
853      truncation level, 11 digits).
854    
855    checkpoint58l_post
856    o calc_gw:
857     - take bi,bj loops outside calc_gw to fix Pb with local array KappaRU,V
858     - remove side-drag for now (need to fix it); update plume_on_slope results.
859     - fix for partial-cell & non-uniform dz; update plume_on_slope results.
860    o commit code to make SST/SSS weights spatially variable
861      (based on either variable in-situ or variable initial T/S weights)
862    o pkg/ecco:
863      * commit code to relax deviations of xx_theta, xx_salt to 5*sigma,
864        now based on horizontally varying weights wthetaLev, wsaltLev
865      * cost_averagesflags now returns year indices in addition to day, month
866      * sflux balance is performed on annual basis
867        (sflxumm, sfluxmm2, bal_sfluxmm)
868      * for SSH anomaly, separate more cleanly contrib from T/P, ERS, GFO,
869        including separate counting and multipliers
870    o pkg/rbcs
871      * add all necessary infrastructure for pkg/rbcs levN adjoint checkpointing
872    
873    checkpoint58k_post
874    o testreport:
875     - always build in dir. "build" (if not there, mkdir build instead of building
876       & running in input)
877     - run in dir run (if it exists), in build otherwise.
878     - call prepare_run (if input/prepare_run exists)
879     - run multi-threaded test (with new option: "-mth") if file input/eedata.mth exists.
880    o pkg/exf modifications to interpolation and rotation routines for more
881       reasonable treatment of North Pole singularity: for tracers North Pole
882       value is set to northernmost zonal-mean value, for zonal velocity it is
883       set to zero, and for meridional velocity it is set to northernmost value.
884    o pkg/exf/exf_check_range.F
885     - add tile index to diagnostics and move stop statement to the very
886       end of the routine.
887    o pkg/diagnostics: (diagnostics_main_init.F)
888      define title of isomorphic variables according to the current config.
889    o pkg/thsice with pkg/seaice dynamics:
890    - fix domain of computation (interior only, required for exf) and do exchanges
891    - seaice-dynamics forcing: add atmospheric and seaice loading to SSH gradient
892    o towards a standard way of dealing with multi-threading in MONITOR
893      and ${PKG}_MONITOR (all except ptracers_monitor) subroutines.
894    o Pass variable viscosities (vertical and horizontal, e.g., KPP or Leith)
895       to W momentum equation in nonhydrostatic and quasihydrostatic runs.  
896    o make exf_monitor & seaice_monitor independant of the main (dynamics) monitor.
897    o pkg/seaice: fix SEAICEuseEVPpickup parameter (put it in a commom block)
898    o generic_advdiff: DST advection S/R : use local copy of velocity to compute CFL
899       (problems ? with gradient check in bottom_ctrl_5x5 adjoint test)
900    o tracer advection:
901     - clean-up and simplify calc_common_factors.F
902     - make a local copy of velocity and pass it (as u,v,r_Trans) to DST tracer
903       advection subroutine (but still not used within DST advection S/R)
904    o rename pkg aim_ocn_coupler to atm_ocn_coupler (later on, will be used without aim)
905    
906    checkpoint58j_post
907    o new driver S/R: LOAD_FIELDS_DRIVER to load external forcing fields
908      from file (collects calls previously in FORWARD_STEP)
909    o move call to SEAICE_MODEL from FORWARD_STEP to DO_OCEANIC_PHYS
910    o adjoint store dir. adjusted accordingly
911    o genmake2
912      replace target "ad_taf" by $(EXE_AD) ; add $(EXE_AD) to the make CLEAN list.
913    
914    checkpoint58i_post
915    o pkg/seaice: add parameter that allows to scale/turn off effect of seaice
916      on wind stress (SEAICEstressFactor defaults to 1.)
917    o Total number of Timers is finite (<=40): comment out 2 non-essential one
918      in the_main_loop.F to avoid Pb (e.g., when running fizhi test)
919    o vector_invariant: fix highOrderVorticity(=4.th.Order) advection
920      on CS-grid: no longer loosing mass.
921    o exf & curvilinear-grid: no longer modify longitude xC & xG.
922    o pkg/ggl90: fix sloppy output and fix a bug
923    o pkg/seaice: added SEAICEuseEVPpickup parameter
924      - Set to false in order to start EVP solver with
925        non-EVP pickup files when using SEAICEuseEVP
926      - fix sign error in diffusion in seaice_calc_rhs
927    
928    checkpoint58h_post
929    * Modifications for bottom topography control
930      o replace hFacC by _hFacC at various places
931      o replace ALLOW_HFACC_CONTROL by ALLOW_DEPTH_CONTROL
932      o add non-self-adjoint cg2d_nsa
933      o update autodiff support routines
934      o re-initialise hfac after ctrl_depth_ini
935      o works for 5x5 box, doesnt work for global_ocean.90x40x15
936    * Adding verification for 5x5 box (4-layer) bottom topography control
937    
938    checkpoint58g_post
939    o pkg/diagnostics: implement "periodic averaging diagnostics" (e.g.,
940       used for mean seasonal cycle, mean diurnal cycle); add an example
941       in verification/global_ocean.cs32x15/input.thsice/data.diagnostics
942    o pkg/ggl90:
943      - add parameter (minimum surface kinetic energy)
944      - fix bug (avoiding division by zero)
945    o couple pkg/thsice to pkg/seaice:
946      - modify advection in seaice to accomodate new scalar fields to be advected
947      - only muliDimAdection scheme work with seaice/thsice
948      - mapping of thsice-variables to seaice-variables, back and forth
949      - does not break the verification experiments, but does not give the
950        desired results either
951    o pkg/seaice
952      - make (default) second order advection a bit less confusing?
953    
954    checkpoint58f_post
955    o couple pkg/thsice and pkg/exf (as a preparation for coupling pkg/thsice
956      to pkg/seaice):
957      - new routines thsice_map_exf and thsice_get_exf provide the interface
958      - add an additional formal parameter to thsice_solve4temp
959    o pkg/exf:
960      - add new fields wspeed, snowprecip (to be able to couple to thsice)
961      - correct Stefan-Boltzmann constant
962      - new parameter for longwave surface emittance
963      - separate some stuff from exf_bulkformulae into new routines  
964        exf_radiation, exf_wind
965      - add new parameters and constants: longwave emissivity for ocean, ice
966        and snow, evaporation parameters over ice
967      - decouple wind/stress computation from ALLOW_BULKFORMULA: always compute
968        either wind from stress or stress from wind
969    o pkg/thSIce:
970    - split thsice_step_fwd.F in 2 S/R: thsice_step_temp.F & thsice_step_fwd.F
971    - put i,j loops inside S/R: THSICE_ALBEDO, THSICE_SOLVE4TEMP, THSICE_EXTEND
972       and THSICE_CALC_THICKN
973    - for now, call to THSICE_GET_BULKF remains inside i,j loops.
974    - add CPP option: ALLOW_DBUG_THSICE and header file THSICE_DEBUG.h
975      to make debugging easier.
976    - affects results (@ truncation level) of global_ocean.cs32x15.thsice: update output
977    o pkg/bulk_force:
978      - clean-up comments and parameters ;
979      - add new Bulk-Formulae from Large and Yeager, 2004, NCAR/TN-460+STR ;
980    o fix bug in aim+thsice albedo: snow & ice thickness arguments were switched;
981      generate new output for test-experiment: aim.5l_cs.thSI
982    o results_ad : rename "output.txt_adm" to "output_adm.txt" and change
983      testreport accordingly
984    
985    checkpoint58e_post
986    o SEAICE_CGRID adjoint done
987    o R_STAR adjoint implemented.
988      * Seems to just work (based on global_ocean.90x40x15/code_ad_nlfs/ )
989      * need to sort out init. of h0facc, etc.
990    o Make pkg/profile fully independent of ecco,cost, etc. stuff
991      to be able to use it in pure forward.
992    
993    checkpoint58d_post
994    o upgrade simple test-experiment to tutorial example:
995     step.1: duplicate the experiment and (step.2) will remove the old copy.
996      tutorial_barotropic_gyre      <- copy of exp0     (R1:barotropic_gyre_in_a_box)
997      tutorial_baroclinic_gyre      <- copy of exp1     (R1:baroclinic_gyre_on_a_sphere)
998      tutorial_global_oce_latlon    <- empty for now    (R1:global_ocean_circulation)
999      tutorial_global_oce_biogeo    <- copy of dic_example
1000      tutorial_deep_convection      <- almost like exp5 (R1:nonhydrostatic_deep_convection)
1001      tutorial_plume_on_slope       <- copy of plume_on_slope
1002      tutorial_tracer_adjsens       <- copy of carbon   (R1:tracer_adjoint_sensitivity)
1003      tutorial_global_oce_optim     <- empty for now (David ?)
1004      tutorial_global_oce_in_p      <- copy of global_ocean_pressure
1005     some tutorials (R1) were already checked-in under tutorial_examples in release1_branch
1006    o correct a sign problem in cost_scat.F
1007    o obcs and ptracers: fix boundary conditions for advections schemes
1008      with larger stencil
1009    o thsice adjoint: start
1010    o mom_vecinv: add ISOTROPIC_COS_SCALING flags to mom_vi_hdissip for
1011      completeness
1012    o mom_fluxform: fixing the mutual use of ISOTROPIC_COS_SCALING
1013      and COSINEMETH_III, add comments in default CPP_OPTIONS.h
1014    o ptracers adjoint:
1015      * avoid extensive recomputatations
1016      * fix missing re-init. of gptr (missed by TAF)
1017    o obcs: add a flag (OBCSprintDiags, defaults is true) that allows
1018      me to turn off the excessive output to STDOUT that this package produces
1019    o move NH metric terms & 3.D Coriolis S/R to pkg/mom_common
1020      and add those terms in Vector-Invariant formulation.
1021    o in ctrl pkg, if ALLOW_CAL, use monthly mean controls
1022      if the control period (xx_hfluxperiod etc) is 0
1023    o in profiles pkg, clean routines and fix details
1024    o in ecco pkg, reading ssh data:
1025      fix problem in case the model does not start at iter0=0
1026    o fix mnc-pickup/restart for ptracers
1027    o new package prifiles:
1028      code to compute profile-based cost by Gael Forget
1029      (modifs in ecco, ctrl, autodiff)
1030    o Benign bug fix in initialization (spotted by M. Mazloff) of
1031      ctrl_set_globfld_xz.F ctrl_set_globfld_yz.F
1032    
1033    checkpoint58c_post
1034    o adjoint: finish NLFS adjoint and provide reference output in
1035      verification/global_ocean.90x40x15/results_ad_nlfs
1036    o seaice: add an EVP solver following Hunke and Dukowicz (1997) and the
1037      documentation of CICE. Turn on by defining SEAICE_ALLOW_EVP in
1038      SEAICE_OPTIONS.h and SEAICEuseEVP=.true. in data.seaice. Works only
1039      with SEAICE_CGRID defined.
1040    o move calendarDumps from "data" to "data.cal" and clean-up the code
1041      with a simple call to pkg/cal S/R: CAL_TIME2WRITE
1042    o add useEXF & useCAL flags (for now, set in hard-coded way)
1043    o add S/R to compute NH-metrics terms & Coriolis f' in vertical momentum
1044      (were missing in NH mode, and wrong in quasihydrostatic mode).
1045      waiting for Chris updated version of calc_gw to add those CALLs.
1046    o fix bug in quasihydrostatic S/R ;
1047      add a test for this option: global_ocean.90x40x15.qshyd
1048    o new S/R "SET_PARMS": set parameters that might depend on the use of some pkgs.
1049      (called from INITIALISE_FIXED, after INI_PARMS & PACKAGES_READPARAMS)
1050    o add on/off flag useOffLine for package OFFLINE
1051    o seaice:
1052      - modify advection so that it works also on the C-grid
1053      - extend loop ranges in seaice_lsr and seaice_dynsolver; fixes
1054        problem in multi-tile runs with C-grid
1055      - add flags for clipping ice velocities and/or masking solver forcing
1056      - fix drag (ocean on ice) formulation and a bug that caused noise in the
1057        C-grid solver
1058      - added a few comments to seaice_diffusion.F
1059      - separate C-grid and B-grid versions more cleanly (UVM and seaiceMaskU/V
1060        are now exclusive)
1061      - add a new ocean-ice stress coupling method (Hibler and Bryan, 1987) which
1062        required re-ordering the code a little:
1063       + make DAIRN global variable (defined in SEAICE)
1064       + move computation of the viscosities eta and zeta into a new separate
1065         routine (because I need to recompute them in seaice_ocean_stress.F)
1066    
1067    checkpoint58b_post
1068    o AIM+thSIce: fix sign of Short-Wave through the Ice ;
1069      update output.txt of exp. aim.5l_cs.thSI
1070    o various mnc cleanups and improvements:
1071      + shrink lookup tables by factor of ~4
1072      + better error reporting when running out of lookup space
1073      + able to handle longer path/file names (up to 500 chars)
1074    o adjoint:
1075      - Another overhaul of store dirs. for NLFS to eliminate  "hidden" recomputations.
1076      - TBD: "hidden" mom_vecinv recomp. in dynamics
1077    o change forcing_In_AB to affects both T,S forcing and Momentum forcing
1078     (allow to differentiate between forcing components using new integer flags:
1079      momForcingOutAB=1/0 & tracForcingOutAB=1/0)
1080     and add new flag to put Dissipation tendency out of Adams-Bashforth.
1081    o ecco
1082      - enable trend removal from SSH anomaly obs.
1083    o adjoint
1084      - a fix for PmEpR when #undef EXACT_CONSERV
1085      - fix of "hidden" recomp. in thermodynamics (no TAF warnings)
1086      - try to fix "hidden" recomp. in forward_step for NLFS
1087        (NLFS seems broken sometimes after I checked it in)
1088    o seaice:
1089     - add c-grid version of the dynamic solver:
1090       + three new routines that are the c-grid substitute lsr, dynsolver
1091         and ostres
1092       + put a few fields that were local to dynsolver into global common
1093         blocks, so that I can move the computation of stresses etc into
1094         seaice_lsr (saves coding but may break the adjoint).
1095     - replace more hardwired parameters by runtime parameters
1096     - add ice masks that mask the rhs of the implicit solvers where there
1097       is no ice (commented out in seaice_dynsolver, because i am not sure
1098       if this works properly), eventually this should replace the clipping
1099       of ice velocities in seaice_dynsolver to +/-40cm/s.
1100    o remove the BUILD_INFO.h include from CPP_EEOPTIONS.h and explicitly
1101      include it only where its needed
1102    o move balancing of fluxes before the call of external_forcing_surf
1103    o seaice:
1104      - correct units of turning angles (now they are really in degrees)
1105      - move computation of GWATX/Y out of main routine into dynsolver
1106      - initialize GWATX/Y in seaice_init
1107    o Apply mask on Fresh-Water flux (needed for SSH forcing).
1108      update output.txt of exp. global_ocean_ebm & cpl_aim+ocn (affects cg2d residual)
1109    o seaice: add runtime flags for turning angles (default to zero)
1110    o Adding runtime parameter to exf/, ctrl/, to remove on-the-fly global mean
1111      and trend from exf forcing and ctrl control adjustments
1112    o fix variable aliasing in gad_calc_rhs that cannot be handled by TAF
1113      (since checkpoint57x_post)
1114    o change the default rotation period to 86164.s = the Earth rotation
1115    o 1rst implementation of Implicit IGW using the 3-D solver (use3Dsolver=T)
1116      and based on a reference stratification. Tested within hs94.cs-32x32x5.
1117    o seaice advection: add code for choosing between the default (2nd order
1118      central differences) and multiDim advection schemes provided by
1119      pkg/generic_advdiff
1120    o seaice:
1121      - removed all references to SEAICE_GRID.h fields from
1122        dynsolver, advect, diffus, lsr, without changing the results of lab_sea
1123        (cubed-sphere configuration will change a little)
1124      - grid computations in seaice_init are obsolete now.
1125      - cleaned up code a little so that is easier to read (hopefully).
1126      - added new (better?) discretizations of default advection and diffusion
1127        (turn on with SEAICEuseFluxForm)
1128      - replace 1 in 3d global fields by kSurface in growth.F
1129      
1130    checkpoint58a_post
1131    o seaice:
1132      - bug fix in advect.F
1133    o shelfice:
1134      - separate shelfice load anomaly from pload (breaks with time
1135        dependent forcing), => introduce constant field shelficeLoadAnomaly.
1136        Its default is 0., but it may be computed more cleverly from (unknown)
1137        t- and s-profiles (tRef, sRef) and actual EOS. For now this has to be
1138        done offline. A good approximation of the pressure load anomaly is
1139        necessary to avoid large initial adjustment processes underneath
1140        deep-reaching shelfice.
1141      - small fix in ISOMIP shelfice_thermodynamics
1142      - add more sophisticated thermodynamics of Hellmer (1989), this is
1143        now the default
1144      - give a few constants more intuitive names
1145    o add code to balance EmPmP and Qnet at the end of do_ocean_physics. Useful
1146      if bulk formulae are used in long integration (especially EmPmR). Turn
1147      on with balanceEmPmR = .true. or balanceQnet = .true. in data, PARM01
1148      if balancePrintMean, the imbalance that is substracted is printed to
1149      STDOUT.
1150    o fix bug (typo) in obcs_apply_eta.F
1151    o add a new package shelfice which enables us to model the circulation
1152      underneath shelf-ice with draughts of hundreds of meters.
1153     - works
1154     - to do: + include improved thermodynamics
1155              + check whether kSurfC (from model/inc/SURFACE.h) can be used
1156                instead of new field kTopC
1157              + can we use topoFile, Ro_surf and existing code in ini_depth.F
1158                instead of new field R_shelfIce and new code in ini_depth.F
1159                and ini_mask_etc.F?
1160              + adjust vertical mixing schemes?
1161    o seaice pkg:
1162     - add a cpp-flag to include a simple formula for a salinity dependent
1163       freezing point of sea water at the surface
1164     - change the contents of SEAICE_TEST_ICE_STRESS_1 so that zonal and
1165       meridional stresses are now different (and hopefully correct)
1166    o AIM pkg: change threshold on large-scale condensation to conserve Heat.
1167       update results of aim.5l_LatLon test ; fix title & units of AIM diagnostics
1168       and  change 3 diagnostics names (OSR,OSRCLR,KM -> TSR,TSRCLR,DRAG)
1169    o pkg/diagnostics: add options and parameters for regional-statistics
1170       diagnostics ; define regions by reading a region-mask from a file
1171       (might add other options later)
1172    o pkg/bulk_force:
1173     - add option and parameters to use AIM surface-flux formulae.
1174     - Change loading part: S/R BULKF_FIELDS_LOAD only take care of bulkf_fields ;
1175       others forcing fields (defined in PARM05, parameter file "data") are loaded
1176       from S/R EXTERNAL_FIELDS_LOAD, as usually (with useBulkforce = T or F).
1177     - initialise all bulkf_fields in bulkf_init.F ; do in-lining of exf_bulkcdn.F
1178     - use the right EXCH call for uwind,vwind (to work on CS-grid).
1179     - re-arrange header files (move parameters from BULKF.h to BULKF_PARAMS.h)
1180       and parameters (note: calcWindStress replaces .NOT.readwindstress).
1181     - cleaner interface with pkg/thSIce (new S/R THSICE_GET_PRECIP).
1182    
1183    checkpoint58
1184    o add "--embed-source" option to genmake2 which, when the supporting
1185      tools can be compiled (as determined by genmake2) will turn on the
1186      embed_files package which then embeds the entire MITgcm source code
1187      (*.[fFhc] + Makefile) used for the build within the executable
1188      - requested by CNH but off by default
1189      - adds a paltry <9MB to the mitgcmuv executable in most cases
1190      - only writes the output when useEMBEDSRC in eedata is true
1191    o clean up 3-dim. relaxation codes:
1192      * Fix I/O inconsistency in pkg/rbcs: replace precFloat32 by readBinaryPrec
1193      * Remove 3-dim. relaxation code from pkg/exf (now use only pkg/rbcs)
1194      * Thanks to Tom Haine for testing!
1195    
1196    checkpoint57z_post
1197    o make CG3D solver compatible with Free-surface at k > 1 (p-coordinate):
1198      affects output (@ truncation level) of exp. plume_on_slope ; updated.
1199    o fix the pickup behavior for obcs in combination with ptracers
1200    o fix a bug in ptracers_external_fields_load
1201    o no AB-2 at the first iteration for Gw (consistent with Gu,Gv,Gt,Gs ...)
1202      affects results of NH experiments (but all our NH tests have Gw[it=1]==0 !!)
1203    o transfered surface NH pressure to eta field (if exactConserv).
1204    o gmredi: fix bugs in slope tapering ldd97 (depthZ had the wrong sign)
1205         and update lab_sea output.txt file.
1206    o completing 3-dim. relaxation code: additional term
1207         1/tau*( theta(i,j,k) - thetaStar(i,j,k) )
1208      in S/R EXTERNAL_FORCING_T (file external_forcing.F)
1209      * At compile time, in "EXF_OPTIONS.h" set
1210          #define  ALLOW_CLIMTEMP_RELAXATION
1211          #define  ALLOW_CLIMSALT_RELAXATION
1212      * At runtime in "data", under &PARM03 set (e.g., units in seconds)
1213          tauThetaClimRelax3Dim = 15552000.0,
1214          tauSaltClimRelax3Dim  = 15552000.0,
1215      * 3 cases:
1216          1) Use a constant-in-time 3-dim. field
1217          2) Provide 12 3-dim. fields corresponding to Jan., ... , Dec.
1218          3) Real-time relax. to time-evolving prescribed field
1219    o Adding Laplacian-type smoothness constraint on
1220      initial and boundary (forcing) controls (ic, bc)
1221      * enable at compile-time via
1222        ALLOW_SMOOTH_IC_COST_CONTRIBUTION, ALLOW_SMOOTH_BC_COST_CONTRIBUTION
1223      * enable at run-time via mult_smooth_ic = 1, mult_smooth_bc = 1
1224      * Absolute scale somewhat unclear so far
1225      * no area weighting was included since no other cost term does so far
1226    
1227    checkpoint57y_post
1228    First step for a NLFS adjoint
1229    o initially suppress rStar (new flag DISABLE_RSTAR_CODE)
1230    o new init. routines for calc_r_star, calc_surf_dr
1231    o still need to deal with ini_masks_etc
1232    o testreport seemed happy
1233    checkpoint57y_pre
1234    
1235    o obcs: always reset wVel & eta (to zero or prescribe it) at the OBs.
1236    o add new package rbcs (for relaxing ptracers at boundaries/depth/surface etc)
1237    o add new offset feature to offline pkg (plus minor cleanup)
1238    o cfc fixes for final year of integration
1239    o clean up GCHEM_OPTIONS.h/DIC_OPTIONS.h (all options should
1240      be in GCHEM_OPTIONS).
1241    
1242    checkpoint57x_post
1243    o fix testreport Pb in multiple test experiment.
1244    o cleanup our namelist syntax in verification:
1245      - make it more F95 standards compliant (some work still needed)
1246      - allows the vast majority of our tests to work with gfortran
1247    o Non-Hydrostatic:
1248     - put all NH variables (formerly in DYNVARS.h & GW.h) in NH_VARS.h
1249     - fix exchange calls for CS-grid using the new EXCH_S3D_RL.
1250    o Allow to apply AB on T,S rather than on AB(gT,gS):
1251     - implemented within #ifdef ALLOW_ADAMSBASHFORTH_3
1252     - use the same arrays (gtNm,gsNm) to hold tracer field at previous
1253       time-steps (if AB(T,S)) and tendencies (if AB(gT,gS)).
1254     - need a "clever" read_pickup to restart from the other AB formulation
1255    o move local commom bloc /GlobalLo/ (used for singleCpuIO) in EESUPPORT.h
1256    o remove some unused variables (reduces number of compiler warnings)
1257    o adjoint
1258      * Disable useVariableViscosity for adjoint for time being
1259        (there are a number of extensive recomputations)
1260      * Initialize certain variables needed for adjoint
1261    
1262    checkpoint57w_post
1263    o pkg/mdsio: use MAX_LEN_FNAM (instead of hard coded 80) for file-names
1264                 fix the singleCpuIO RS version of MDSWRITEFIELD
1265       and add a WARNING if using globalFiles=T with multi-processors.
1266    o write grid-file(s) in only one format (MDS or MNC): default=MNC (if
1267      using MNC); can force MDS output by setting writegrid_mnc=F in data.mnc
1268    o tracer advection scheme:
1269      add DST-2 (=Lax-Wendroff) & 1rst order upwind schemes (the way to get
1270       those 2 schemes before, changing GAD_FLUX_LIMITER.h + to recompile,
1271       was not very convenient).
1272      add implicit version for DST-3 & DST3_Flux_Limit vertical advection;  
1273       (further tests needed for the implicit DST & Flux-Limiter schemes).
1274    o PTRACERS: added namelist parameter PTRACERS_ref in analogy to tRef
1275      and sRef for convenience, handy, when you want to initialize
1276      ptracers in a large domain with a constant non-zero value. Also,
1277      untangle ptracers_init.F a little.
1278    
1279    checkpoint57v_post
1280    o change dome exp. to use variable viscosity in side-drag terms.
1281    o remove all the files from the cfc_offline test since they are now
1282      incorporated into tutorial_cfc_offline which has been producing
1283      identical results for a few days of testing
1284    o add new parameter: sideDragFactor to enable half-slip-side BC
1285      and change side-drag S/R to use viscosity from mom_calc_visc
1286      (can switch back by setting sideDragFactor=0.); affects results at
1287      truncation level; regenerate output for exp.: global_ocean.cs32x10(x3),
1288       global_ocean_ebm, global_ocean_pressure, matrix_example & MLAdjust(x5).
1289  o vorticity & strain are now computed without masking, to account for  o vorticity & strain are now computed without masking, to account for
1290    no-slip-side BC in variable viscosity calculation ; mask is applied    no-slip-side BC in variable viscosity calculation ; mask is applied
1291    anyway later on, before computing advection/coriolis terms.    anyway later on, before computing advection/coriolis terms.
1292  o modify exp4 to test new obcs support reading from external files  o modify exp4 to test new obcs support for reading from external files
1293    and for passive tracers    and for passive tracers
1294  o fix behavior of ptracers_monitor when monitor output is written to a  o fix behavior of ptracers_monitor when monitor output is written to a
1295    netcdf-file; still not independent of monitor.F (writes in the same    netcdf-file; still not independent of monitor.F (writes in the same

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