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revision 1.1424 by mlosch, Thu May 5 09:24:44 2011 UTC revision 1.1604 by gforget, Sat Mar 3 03:46:25 2012 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/ctrl:  o pkg/seaice :
8      - final version of turbulent flux params, as agreed at MIT ice meet:
9           SEAICE_mcPheePiston (default is ~ 0.000875)
10           SEAICE_mcPheeTaper (default is 0.)
11           SEAICE_frazilFrac (defualt is 1.)
12           SEAICE_mcPheeStepFunc (default is false)
13      - changes results at trunction error level.
14    o added pkg/frazil - see frazil_description.tex for details
15    o pkg/shelfice/shelfice_thermodynamics.F
16      - fix exponents for velocity dependent exchange coefficients: change
17        from 2/3(=0) to 0.66666666666666667
18      - move computation of velocity dependent exchange coefficients into
19        separate loop, so that it applies to both thermodynamics
20      - move some divisions by constants out of loops
21    
22    checkpoint63j (2012/02/16)
23    o pkg/seaice:
24      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
25      - SItracer:  added run time params, and allow coupling to ocn salinity.
26    o pkg/seaice: remove (almost) all divisions by constants within loops
27      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
28      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
29      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
30      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
31    o pkg/seaice :
32      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
33        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
34      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
35      - add permanent SItflux diag that corresponds to TFLUX but includes
36        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
37      - allow activation/testing of a fix for suspected missing term in
38        ocn-ice heat budget (to be confirmed). To test this, you want to
39        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
40        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
41      - no change in results, fwd or ad.
42    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
43      - switch to variable freezing point.
44           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
45      - bug fix : the sublimation term that was missing is now activated.
46           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
47      - bug fix : flooding sign term for SIsal0.NE.0.
48           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
49    o pkg/seaice:
50      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
51        is now the default, and the old default constant freezing point is recovered
52        with SEAICE_tempFrz0    = -1.96,
53             SEAICE_dTempFrz_dS = 0.,
54      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
55      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
56      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
57        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
58      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
59        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
60      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
61        seaice_growth r149 for legacy branch (no results change).
62      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
63        from I. Fenty).
64      - results did not change except for global_ocean.cs32x15, mostly due to the
65        switch to variable freezing point (see above item for detail).
66    o pkg/thsice:
67      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
68        seawater freezing in thsice_calc_thickn (not used).
69    o pkg/seaice: turbulent flux term specification via run time params.
70      - replace CPP switches with run time switches to facilitate testing
71      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
72                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
73      - added runtime parameter : SEAICEturbFluxFormula
74      - move Mcphee constants to SEAICE_PARAMS.h
75      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
76                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
77                 remove seaice_summary call (moved to seaice_init_fixed)
78      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
79        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
80      - seaice_summary.F : add missing report of read turbulent flux term set up
81                           and SITRACER.
82      - seaice_check.F : check range; inform and stop if retired CPPs are used
83                         (incl. SEAICE_AGE).
84      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
85             CPP switch, same computation as before for the different options.
86      - change results at the truncation level.
87    o pkg/seaice:
88      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
89        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
90        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
91      - update verification/*/input*/data.seaice:
92        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
93        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
94        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
95        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
96    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
97      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
98        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
99        difference in results only due to machine truncation.
100      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
101        MaykutPolySatVap; keep MIN_LWDOWN.
102      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
103      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
104        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
105    o pkg/salt_plume:
106      - isolate saltPlumeFlux array exch into a specific S/R called from
107        do_oceanic_phys.F
108      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
109    o verification:
110      - move untested set-up to MITgcm_contrib/verification_other.
111    o pkg/seaice:
112      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
113    o pkg/seaice:
114      - seaice_solve4temp.F (keeping results unchanged):
115        * add 2 future run-time params to select which saturation vapor pressure
116          formula is used and how post-iteration fluxes are set.
117          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
118        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
119          the linearized expression to stay consistent with tsurf finding.
120      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
121        can be < 0.
122    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
123      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
124        conductive heat flux F_c , and add it explicitly when updating tsurf as
125        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
126        so that now F_ia has a consistent meaning through the entire routine.
127        This causes differences at truncation level: update output of fwd exp.
128        global_ocean.cs32x15.seaice.
129    o pkg/seaice:
130      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
131        of arrays, sign/direction of fluxes; no effect on results.
132      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
133        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
134        note: this should have been done before changing celsius2K default.
135      - to keep results unchanged, add back old value of celsius2K in verification
136        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
137      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
138        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
139        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
140        freezing temp is consistent with value in seaice_growth.F ; this causes
141        differences at machine truncation level: update lab_sea AD output (3/4).
142    o pkg/seaice:
143      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
144        and climsst/sss even when using seaice (to prevent calculation that might
145        use SST on land); does not affect any verification exp.
146      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
147        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
148    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
149      over land (non-legacy code)
150    o vectorize salt_plume package:
151      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
152      - this code computes plumebk everywhere (also over land), thus requires
153        code to avoid divisions by zero and catch the case of kLev=Nr.
154      - efficiency of salt_plume_frac is still sub-optimal
155    o tools (genmake2):
156      - fix makefile NAME specification (option: -makefile NAME) by adding
157        "-f $MAKEFILE" in few places where it was missing including makedepend
158        command (contribution from Paul).
159    
160    checkpoint63i (2012/01/24)
161    o model/src:
162      - add factorized versions of some EOS code to find_rho.F,
163        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
164    o model/src:
165      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
166      - change default celsius2K from 273.16 to 273.15
167      - to keep results unchanged, add back old value of celsius2K in verification
168        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
169         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
170    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
171      to make TAF generate vectorizable code
172    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
173       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
174       have flags that do this more efficiently.
175    o pkg/diagnostics/diagstats_calc.F
176      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
177    o pkg/obcs (with exch2):
178      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
179        and remove code (in obcs_readparms.F) which was based on EXCH of indices
180        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
181    o pkg/exf and seaice exp:
182      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
183        so that switching off area & heff advection flags does not affect results.
184      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
185      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
186        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
187        results of verification experiments: 1D_ocean_ice_column(fwd),
188        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
189        and offline_exf_seaice (all 4).
190    o pkg/seaice:
191      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
192        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
193      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
194        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
195        not multi-dim advection;
196      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
197        SHORTWAVE_HEATING #undef.
198    o optim: make Makefile more robust (?)
199    o pkg/obcs:
200      * fix treatment of obcs_read_pickup for TAF
201    o pkg/shelfice:
202      * add missing initialisation of num_shifwflx
203      * new adjoint verification exp. for isomip
204      * change Prandtl and Schmidt numbers from generic formulations
205        (in terms of model diffus. and visc.) to separate runtime
206        parameters, with Holland and Jenkins (1999) default values.
207    o pkg/exf (interpolation):
208      - extended input field (2 rows) near the N & S poles:
209        * fill in with the symetric value (when even Nb of data in longitude)
210        * add average value at the poles only for scalar quantities ; for vector
211          component interpolation, skip the averaging and keep duplicated values,
212          unless the 2 components have same location (uvInterp=T) in which case
213          interpolate the 2 components together using S/R EXF_INTERP_UV.
214      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
215        together: this allows to account properly for local orientation when
216        averaging at N & S pole.
217      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
218        exf-interpolation near N & S poles. Undef by default.
219      - add debug check/print on 1rst iter if debugLevel >=2.
220    o pkg/exf:
221      - change masking flags definition (no longer "parameter"), put them in
222        common block and set them in S/R EXF_INIT_FIXED.
223      - change recognized masking flag from s,u,v to c,w,s since the mask
224        to use (maskC,W,S) depends on position on model grid and has little to
225        do with scalar/vector difference; fix masking if using P-coordinates.
226      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
227        and update results of exp. global_with_exf (x2).
228      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
229    o pkg/obcs
230      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
231    o pkg/exf (interpolation):
232      - assume periodicity in X only if input field cover full longitude range.
233      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
234        and should vectorise).
235      - fix input lat of the 2 added row (in case we provide N.pole data).
236    
237    checkpoint63h (2011/12/30)
238    o pkg/seaice:
239      - change declaration of UVM from _RL to _RS in order to get B-grid
240        uIce,vIce monitor when _RS = real*4
241    o pkg/offline:
242      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
243      - compute vertical velocity if not read from file (switch on exactConserv
244        & staggerTimeStep);
245      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
246    o verification:
247      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
248        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
249        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
250      - update output of exp. global_ocean.cs32x15.viscA4 after changing
251        grid-file angles (used here for coriolis-3d);
252      - remove (or gzip) few files not needed to run fizhi-cs experiments.
253    o pkg/exf (vector interpolation):
254      - rotate vector component toward local grid-axis orientation using grid-angles
255        (stored in GRID.h) instead of locally computed rotation angle; keep old code
256        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
257    o pkg/seaice:
258      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
259        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
260    o pkg/PKG_OPTIONS.h files:
261      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
262        outside of the #ifdef ALLOW_THISPKG / #endif block.
263      - update verification/*/code/PKG_OPTIONS.h files.
264    o add a verification experiment (offline_exf_seaice/input.seaice) that test
265      the B-grid LSOR solver
266    o pkg/seaice: sort out emissivity and long wave radiation step 2:
267      - add emissivity for snow and ice as new run-time parameters
268        (unfortunately) that default to the corresponding exf values; this
269        changes results in most verification experiments so that for backward
270        compatibility these parameter have to be set explicitly to inconsistent
271        values (ugly);
272      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
273        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
274        until we agree how to handle this bug properly
275    o pkg/exf (interpolation):
276      - add a set of run-time param ({inputfield}_interpMethod), one for
277        each interpolated input field, to select the interpolation method
278        with a value of zero switching off the interpolation;
279      - print interpolation parameters to standard output;
280      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
281        (to use instead runoff_interpMethod=0 in data.exf).
282      - simplify default setting of interpolation parameters (for all fields,
283        set position to match model grid cell-center position, leading to trivial
284        interpolation in case of regular Lat-Lon grid) and fix for the case of
285        non-uniform delY.
286    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
287       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
288       this factor is absolutely required, because the lw exitance (= out-going
289       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
290       where the reflectivity rho = 1-emissivity for conservation reasons. Once
291       this is established, we can remove the CPP-Flag (if we want to).
292    o pkg/seaice:
293      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
294        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
295      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
296        what the name implies (and not emissivity*BoltzmannConstant), this means
297        the old default value of 5.5e-8 now means
298        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
299        S/R exf_readparms
300      - FV-discretization of the B-grid LSOR solver, turn on with
301        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
302        of the calling routine dynsolver, so that B and C-grid code look a
303        little more alike.
304      - fix index bugs in ostres.F (B-grid code)
305    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
306    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
307      default for SEAICE_emissivity, if useEXF; requires setting a wrong
308      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
309      backward compatiblity
310    o model/src: use sigmaR in calc_ivdc
311    
312    checkpoint63g (2011/12/16)
313    o pkg/seaice/seaice_growth.F:
314      fix heat conservation of the coupled ocean-seaice system.
315      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
316      solid vs liquid water treatment is resolved via QNET.
317    o pkg/seaice/seaice_growth.F:
318      add missing term for sublimation in saltFlux, which was breaking conservation.
319    o pkg/seaice/seaice_model.F:
320      Remove this patholigical case treatment in evolution branch,
321      where it is un-necessary and breaks conservation.
322      Update global_ocean.cs32x15/results accordingly for
323      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
324    o model/src:
325      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
326      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
327    o pkg/obcs:
328      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
329      tendency for temperature and salinity that is then applied to update
330      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
331      horizontal advection and diffusion contributions on the boundary (in
332      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
333      removing the mask in S/R timestep_tracer. The advantage of this approach is
334      that the updated tracer values include contributions from the surface
335      forcing and vertical diffusion.
336      This modification changes exp4.stevens because of vertical diffusion.
337    o model/src:
338      change non-curvilinear grid setting to also work with exch2 + blank tiles:
339      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
340        face dimensions.
341      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
342        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
343        and INI_SPHERICAL_POLAR_GRID.
344      change test-experiment global_ocean.90x40x15:
345      - split the domain in many more tiles (9x4 tiles of 10x10 each);
346      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
347      - update results of both test (std & dwnslp).
348    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
349       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
350    o model/src:
351      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
352        and fix initialisation when using sigma-coords.
353    o model/src:
354     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
355       to their current value at the beginning of forward_step.F": add a new run-time
356       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
357     - set doResetHFactors=T in the following test exp:
358        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
359        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
360        and tutorial_global_oce_in_p (nonLinFS in p)
361    o pkg/ecco
362      - added IES cost term
363    o verification/advect_xz
364      - scale down the depth by 1/100 (from 200 km to just 2.km)
365      - add secondary test using divergent flow, r-star and implicit vertical advection.
366      - add note (check_conserve_TS.txt) and matlab script to check global
367        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
368    o pkg/rbcs:
369      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
370    o pkg/obcs (Stevens BCs):
371      - fix various problems in the phase speed computations of the Stevens
372        boundary conditions:
373        - sign error for western and southern boundaries,
374        - time tendencies were underestimated by factor of dTracerLev and some just
375          zero (for multidim advection schemes) -> now estimate time tendencies
376          from difference between previous (n) time level and the one before (n-1);
377          this requires storing a field per tracer per boundary, also in the pickup
378          files.
379        - replace deltaTmom in cflMer/Zon computation with dTracerLev
380        - set default phase velocity to cflMer/Zon
381      - update verification experiment exp4.stevens
382    o pkg/generic_advdiff (implicit_r):
383      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
384        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
385      - fix implicit vertical diffusion or advection with NonLin FreeSurf
386        (was using current recip_hFacC instead of future recip_hFacC): set future
387        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
388        solver S/R ;
389      - fill diagnostics of vertical advective fluxes (computed from tendency)
390        when using implicit vert. advection;
391      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
392         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
393         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
394         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
395    o pkg/diagnostics:
396      - add diags for T & S tendency which goes through Adams-Bashforth.
397    
398    checkpoint63f (2011/11/30)
399    o pkg/obcs/obcs_calc_stevens.F:
400      - join some loops to reduce number of if-statements
401      - fix a bug in code for northern and southern boundaries.
402    o pkg/seaice/seaice_init_varia.F
403      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
404        caused zero ice-velocities for the B-grid code
405    o pkg/seaice/seaice_init_fixed.F
406      - fix a bug in the initialisation of the second metric terms
407        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
408      - this affects all seaice configurations with useCurviLinearGrid = .true.
409        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
410        = .true. (default)
411      - the only verification experiment affected is global_ocean.cs32x15:
412        icedyn, seaice, and seaice_dynmix (AD)
413    o pkg/thsice/thsice_diagnostics_state.F
414      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
415        not contain garbage that can lead to surprises in diagstats_calc.F
416    o model/src:
417      - move bi,bj loops inside INTEGR_CONTINUITY ;
418      - call INTEGR_CONTINUITY directly from forward_step.F
419        (previously called from momentum_correction_step.F)
420      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
421        forward_step.F and pkg/ecco/the_main_loop.F
422    o model/src/do_oceanic_phys.F:
423      - reset addMass to zero only if useICEFRONT ;
424      - separated k-loop for rhoInSitu calculation ;
425      - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
426        and at constant T,S (= WdRHOdP);
427      NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
428        of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
429        transport of locally-referenced potential density);
430        to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
431    o gluemnc:
432      - replace ncrcat with ncks when adding variables to *.glob.nc
433      - change the way variables without record dimensions are handled so that
434        files that have variables with and without record variables can be glued:
435        add a record dimension with a new unique name to be able to differentiate
436        between variable with and without a-prior record dimensions. Remove
437        this record dimension before adding the variable to the *.glob.nc file.
438        This procedure automatically works also for grid.*.nc files that do not
439        have any record dimension.
440    o verification/cpl_aim+ocn:
441      - generate new reference output on baudelaire (gfortran, mpich2) (previously
442        from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
443    o pkg/obcs/obcs_calc_stevens.F:
444      - add code for northern and southern boundaries.
445      - reorder some loops to save some operations and so that drFBar can be scalar
446    o model/src:
447      - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
448        truncation) and add diagnostics for Adams-Bashforth tendency increment.
449      - update test-exp. AD output:
450        1D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
451      and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
452        front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
453        global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
454        matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
455        tutorial_global_oce_in_p, tutorial_global_oce_latlon and
456        tutorial_plume_on_slope.
457    o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
458      that vectorises. This code uses 3 extra 2D fields, F90 array assignments
459      and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
460      does not even come with an F77 compiler anymore, this should not be
461      a limitation
462    
463    checkpoint63e (2011/11/06)
464    o pkg/seaice adjoint of LSR:
465      - substantially rework STORE dirs.
466      - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
467        this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
468        and only perform SOLV_MAX_FIXED adjoint iters.
469        If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
470        always goes to same record, meaning that the last forward field will be
471        the one used in the adjoint - an approximation.
472      - now produces non-zero LSR-related gradients, and acceptable gradients for
473        An's zonal (x-z) test case (to be checked in)
474      - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
475        (but these are screwed up by the thermodynamics in the first place);
476        reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
477        output_adm.txt also reflects changes to seaice_lsr
478      - global_ocean.cs32x15:
479        * the "default" input_ad.seaice has been re-defined to always exclude dynamics
480          (output_adm.seaice.txt was updated)
481        * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
482          (output_adm.seaice_dynmix.txt)
483    o test-exp. exp4+stevens:
484      - switch off pTracers and nonHydrostatic (restart problems with NH); update output
485    o pkg/seaice (lsr solver):
486      - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
487        update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
488      - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
489      - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
490        into initial guess for linearised solver; use weight ~ (1/err)^2,4.
491      - compute (with new S/R) and print initial (+ free-driff sol. if available)
492        and final residual of linearised system.
493    o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
494      (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
495    o pkg/obcs: Stevens BCs (still only for east and west)
496      - fix Stevens BCs by using intermediate velocities of previous
497        time step as "baroclinic" contribution rather velocity of one grid cell
498        inside the boundaries; more consistent but makes the entire treatment
499        more complicated, requires new pickup files and two new S/Rs:
500        obcs_copy_uv_n and obcs_save_uv_n
501        keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
502        (undefined by default)
503      - silently move computation of some grid factors into separate loops to
504        save some recomputations
505      - add a hack for non-linear free surface
506      - add a verification experiment to exp4 that tests this code
507    o make gluemnc/xplodemnc work with (moron) non-GNU shell tools
508    
509    checkpoint63d (2011/10/25)
510    o pkg/obcs + seaice-dynamics:
511      - new implementation calls OBCS_APPLY_UVICE (in seaice_dynsolver.F) before
512        solving for uIce,vIce and prevent SEAICE_LSR or SEAICE_EVP to modify OB
513        values (consistent with an implicit method).
514      - add option OBCS_UVICE_OLD (in OBCS_OPTIONS.h, defined by default) to
515        return to older implementation (same results as before); note that none of
516        the "experimental" OBCS_SEAICE options are implemented in the new version.
517      - switch test exp. seaice_obcs to use new version (update output).
518    o pkg/seaice:
519      - add few stop (B-grid & CS-exch, B-grid & obcs, AUTODIFF & SEAICE_maskRHS)
520      - add parenthesis in Water-Ice drag calculations (evp & lsr);
521      - in seaice_lsr.F, simplify and fix AA3 setting in case sNx or sNy=1;
522        and fix case SEAICE_waterDrag=0 (but unstable if no or little seaice)
523      - update output of test exp lab_sea that uses evp or lsr (fwd+ad)
524        and global_ocean.cs32x15 (icedyn & seaice fwd+ad).
525    o pkg/layers:
526      - Include potential density as new coordinate (Thanks to David Munday)
527    o pkg/dic:
528      - Remove subroutine CALC_PCO2_APPROX_CO3 from carbon_chem.F and add
529        carbonate computation/output to CALC_PCO2_APPROX
530    o pkg/generic_advdiff
531      - make TAF generate code that vectorizes:
532        gad_dst3fl_adv_*.F, gad_u3c4_impl_r.F
533    o model/src:
534      - improve vectorization also for adjoint code of
535        solve_tridiagonal and solve_pentadiagonal. As this requires up to
536        5 new 3D-fields, this code is only turned on for the combination of
537        ALLOW_AUTODIFF_TAMC and TARGET_NEC_SX. Also remove error message
538        for singular matrix check (only for TARGET_NEC_SX).
539      - remove hard-wiring of CPP-flag ALLOW_SOLVERS_KLOOPINSIDE to
540        ALLOW_AUTODIFF. This flag now needs to be set outside of
541        solve_tri/pentadiagonal.F
542    o pkg/exf:
543      - fix previous modif in exf_readparms.F (revision 1.66: treatment of
544        optional namelist EXF_NML_OBCS).
545      - add many debug-print (to trace down where pkg/cal error msg comes from)
546    o pkg/mom_vecinv/mom_vi_hdissip.F
547      - rearrange loops so that vectorization is improved and in particular
548        the adjoint routine vectorizes. The code is a little longer now, but I
549        think easier to read.
550        Note: CPP-flag MOM_VI_ORIGINAL_VISCA4 is not tested.
551    o pkg/seaice:
552      - allow to specify initial seaice velocity from files (uIceFile,vIceFile)
553    o pkg/exch2:
554      - alternative code (without tile x tile matrix) for cumulated (global) sum;
555        used as default; keep using matrix version in adjustment.cs-32x32x1.
556    o tools/build_options:
557      - after merging some MPI and/or multi-threads specific optfiles so that
558        the modified default optfile support both built (using genmake2 -mpi
559        for the MPI built, using genmake2 -omp for OpenMP built),
560        move now obsolete optfiles to tools/build_options/unsupported/
561       (add copy of email sent to support list in doc/optfiles_changes.txt)
562    
563    checkpoint63c (2011/09/28)
564    o pkg/ebm:
565      - fix ebm_zonalmean.F for several procs in Ydir (nPy > 1); update output of
566        test exp. global_ocean_ebm (affects machine truncation, 12 digits for cg2d)
567    o pkg/seaice (SItracer pickup)
568    * Simple code for pickup of SItracer fields (#define ALLOW_SITRACER)
569      To be done:
570      - thorough testing of missing fields in S/R seaice_read_pickup
571      - thorough matching between generic tracers and specific fields used
572        (e.g. volume-weighted age, area-weighted age, salinity, ...)
573    o pkg/grdchk:
574      - all procs calculate and print finite-difference gradient (for testreport)
575      - change description output used by testreport;
576      - AD testing: also compare and report Finite-difference gradient;
577        => update all output_adm*.txt
578    o test exp. global_ocean_ebm:
579      - switch back useRealFreshWaterFlux (no problem anymore with run-off);
580        and turn on exactConserve; update (fwd) output.
581    o pkg/seaice (LSR):
582      - print to STDOUT number of solver iterations at SEAICE_monFreq interval.
583      - modify solver to deal cleanly with u/v switch at face edges (CS-grid):
584        * identical results with non-CS topology (but save up to half of EXCH calls)
585        * no much changes in cs-32 verification tests since no ice at face edges
586         (differences due to convergence criteria, since nb of iterations changed)
587        * expect some differences on lat-lon-cap grid.
588        update FWD results of global_ocean.cs32x15 test exp. (icedyn & seaice)
589    o pkg/exch2:
590      - add new CPP option to disable Cumul-Sum matrix (to save storage when using
591        many tiles); until alternative coding is added, just add a stop.
592    o pkg/kpp:
593      - move ptracer/salt correction to KPP diffusivity from calc_3d_diffusivity.F
594        to S/R KPP_CALC_DIFF_PTR (+ add tracer-index to argument list).
595    o optfiles:
596      - merged few MPI specific (*+mpi*) and multi-threads specific (*+mth) optfiles
597        into corresponding standard one, which now support different build:
598        (when using "genmake2 -mpi" for MPI built, "genmake2 -omp" for OpenMP built)
599      - add "darwin_amd64_gfortran" optfile (initially from Constantinos, tested by Gael)
600    o pkg/obcs (seaice):
601      - add missing EXCH for uIce,vIce after applying OBCS;
602      - remove S/R EXF_SWAPFFIELDS_X/Y , disable S/R EXF_SET_OBCS_X/Y by adding
603        argument = number of levels to S/R EXF_SWAPFFIELDS_XZ/YZ and S/R
604        EXF_SET_OBCS_XZ/YZ ; update obcs_exf_load.F;
605      - fix EXF_SET_OBCS_XZ/YZ for multi-threaded (assuming loaded arrays are shared)
606      - verification exp. seaice_obcs: split domain in 2 tiles ; add SIZE.h_mpi
607        and eedata.mth for MPI and mutlti-threaded testing.
608    o pkg/flt:
609      - make FLT EXCH working with multi-threads (and MPI + multi-threads);
610      - use buffer for floats IO (trajectories & profiles); size set in FLT_SIZE.h;
611      - fix pickup and trajectories + profiles output with multi-threads;
612      - add parameter to select group of fields to write along trajectory and
613        profile (default unchanged);
614      - only call PORT_RAND* function when flt_noise <> 0;
615      - add multi-threaded test for verification exp. flt_example.
616    o eesupp/src:
617      - fix S/R ALL_PROC_DIE for MPI+multi-threads.
618      - USE_OMP_THREADING: check that number of threads (from eedata) matches
619        actual number (from env.var. setting).
620    o pkg/ebm:
621      - fix multi-threading in ebm_area_t.F ; clean-up EBM.h header file.
622      - add multi-threaded test for verification exp. global_ocean_ebm
623    
624    checkpoint63b (2011/08/29)
625    o pkg/ebm:
626      - fix sign of runoff;
627      - update directly forcing fields (Qnet,EmPmR) to use standard
628        external_forcing_surf.F (remove ebm_forcing_surf.F);
629      - avoid loading forcing fields a 2nd time (1rst time from ini_forcing.F);
630      - set either tauThetaClimRelax (in data) or tauThetaZonRelax (in data.ebm)
631        and apply relaxation towards corresponding SST field (2-D map or ZonAver).
632      - update global_ocean_ebm parameters file data and update output (fwd+ad).
633    o verification/matrix_example:
634      - split domain in 8 tiles (2x4); add SIZE.h_mpi and eedata.mth for
635        MPI and mutlti-threaded testing.
636    o pkg/matrix:
637      - change name of S/R MATRIX_INIT to S/R MATRIX_INIT_VARIA ;
638      - fix for multi-tiles (add bi,bj indices to exp/impMatrixCounter);
639      - fix for multi-threaded (remove DATA statement);
640      - use standard DIFFERENT_MULTIPLE function;
641      - add MATRIX_OPTIONS.h
642    o verification/matrix_example:
643       To allow to split the domain in several tiles, change the domain size
644        from 31x31 to 32x32 by adding 1 row (on Southern side) + 1 column (on
645        Western side) of land points.
646    o (*_)write_pickup:
647      - fix few bugs in mypackage_read/write_pickup.F
648      - in MDS_WR_METAFILES calls, replace "myTime" by a local copy into
649        array of length 1 (was caught by compiler syntax-check).
650    o pkg/diagnostics (velocity potential solver):
651      - fix initialisation of main diagonal matrix (for overlap values)
652    o tools/build_options:
653      - towards single optfile for MPI and non-MPI built: merge few +mpi optfile
654        into previously non MPI one (linux_am64 pgf77,open64,pathf90,ifort11)
655      - linux_amd64_gfortran: merge +mpi_generic version into standard optfile:
656        * move IEEE flags to DEVEL section; take IEEE flags from +mpi_generic ;
657        * FAST case: for now, keep -O3 with ini_masks_etc.F in NOOPTFILES list;
658        and use "-devel" testreport option for standard testing on baudelaire.
659    o pkg/grdchk:
660      - Assume that all gradient-check position are within the same tile
661        corresponding to global indices (iGloTile,jGloTile) and that
662        positions (i,j indices or nbeg) are local to this tile;
663      - set tile local-indices and proc. number according to tile global-indices;
664      - remove grdchkwhichproc from namelist (retired param);
665      - send adjoint gradient to all procs so that all procs print it to STDOUT;
666      - switch on MPI test for global_ocean.90x40x15 AD test experiment.
667    o adding package bbl (Bottom Boundary Layer)
668      description in MITgcm/pkg/bbl/bbl_description.tex
669      example/test experiment in MITgcm_contrib/bbl
670    o adjoint verifications
671      - changed 5 experiments to multi-tiles
672        * global_ocean.90x40x15
673        * obcs_ctrl
674        * offline_exf_seaice
675        * tutorial_dic_adjoffline
676        * tutorial_tracer_adjsens
677        changed reference output for those that crossed tile boundaries
678        (changed choices of gradient check positions)
679      - with same tiling, switch on MPI test for the last 4 (add SIZE.h_mpi)
680      - temporary bug fix in grdchk_loc.F for obcs
681    o genmake2 & testreport
682      - add target "obj" (just for OBJFILES files) to Makefile;
683      - add option to specify FEXTRAFLAGS on command line.
684    o pkg/mypackage:
685      - remove bi,bj arguments from argument list of S/R MYPACKAGE_CALC_RHS
686    
687    checkpoint63a (2011/08/02)
688    o pkg/diagnostics (velocity potential):
689      - fix velocity-potential calculation when using OBCS: balance net inflow
690        at each level (new S/R OBCS_DIAG_BALANCE).
691      - fix some of the problems with OBCS in stream-function calculation.
692    o pkg/exf/exf_readparms.F
693      - make treatment of optional namelists (EXF_NML_04, EXF_NML_SGRUNOFF,
694        EXF_NML_OBCS) more consistent, so that you need not have these lists
695        in data.exf when they are not used.
696    o optim/optim_readdata.F:
697      - add some output about obcs variables that might help debugging
698      - add a check about nvarlength
699    o pkg/ctrl: once again, fix computation of endrec in s/r ctrl_init_rec
700    o pkg/diagnostics (velocity potential):
701      - fix mask for OBCS (still problems in stream-function with OBCS);
702      - add specific parameter (default = main code CG2D params) for solver;
703      - in case of poor convergence, use solution corresponding to lowest residual.
704    o pkg/seaice/seaice_growth.F: small changes that permit vectorizable
705      adjoint code. In general statements like tmpscal=fld(i,j) are problematic
706      and should be avoided where possible.
707    o model/src (rStar):
708      - include r* effect on reference-state (PhiRef) in totPhiHyd
709        (so that it's really the potential anomaly at the cell center);
710        affect solution only if z* with full pressure in EOS.
711      - test-exp global_ocean.90x40x15: reduce viscA4 (was not stable) and
712        update output (because of z* in totPhiHyd and viscA4 changes);
713      - keep the previous diagnostics as "PHIHYDcR" (closer to potential anomaly
714        @ constant r) until interpolation at constant r is implemented.
715    o pkg/diagnostics
716      - fix RCENTER diagnostics in case cell center is not at interface middle
717    o add code for TEOS-10 (www.teos-10.org, McDougall et al. 2011). Use
718      this eos with eosType = 'TEOS10', in data (PARM01). This eos implies
719      that THETA and SALT are "conservative temperature" and "absolute
720      salinity"
721    o pkg/ctrl
722      - fix computation of endrec in s/r ctrl_init_rec
723      - ctrl_pack/unpack_*: remove unused variables and some obsolete code
724    o pkg/seaice/seaice_growth.F
725      - fix recomputation with FENTY_AREA_EXPANSION_CONTRACTION code,
726        remove then obsolete STORE directives
727      - fix STORE directives for tice and tices, so that only the
728        appropriate part of the fields are stored (and not the entire
729        field); update global_ocean.cs32x15.seaice AD output.
730      - cosmetic changes: adjust CPP flags and indentation for better
731        legibilty
732    o pkg/autodiff: add mnc-output of adBottomDragFld (code contributed by
733      Chris Wilson)
734    o pkg/gmredi:
735       Add Sub-Meso Eddies parameterisation from Baylor (for now, disabled with TAF),
736       and test it in verification exp. "front_relax.bvp" (update output.bvp.txt)
737    
738    checkpoint63  (2011/07/11)
739    o pkg/exch2:
740     - rename+move: nTiles in W2_EXCH2_PARAMS.h --> exch2_nTiles in W2_EXCH2_TOPOLOGY.h
741     - exch2 version of Cumul-Sum routine: S/R W2_SET_MAP_CUMSUM set up the
742       (2*nTiles)x(nTiles) Cumul-Sum matrix and Master Proc collects all tiles X,Y
743       increments, calculates Cumul-Sum @ tile origin and sends results to each tile.
744    o pkg/diagnostics:
745     - deal with pairs of post-processed diags which are computed together; in
746       particular, re-order list of diags within 1 file to save 2nd computation.
747     - add S/R to compute velocity stream-function (called after velocity-potential
748       calculation) from divergence free transport -> new diagnostics "PsiVEL".
749     - add parameter to select grid-point location where PsiVEL == 0.
750    o eesupp/src:
751       new S/R to calculate cumulated sum on tiled array, corner grid-cell location
752       (specific S/R needed with exch2 topology - for now, just print an error msg)
753    o pkg/shelfice
754     - Implement friction velocity-dependent transfer coefficients following
755       Holland and Jenkins, JPO, 1999
756       Original code by M. Losch with small modifs.
757       Enable with CPP option SHI_ALLOW_GAMMAFRICT
758       and runtime flag SHELFICEuseGammaFrict
759    o verification lab_sea & global_ocean.cs32x15:
760     - use tools/xmakedepend (instead of cyrus_makedepend, in genmake_local):
761       does not miss some dependencies (but is slower) and also works with many files
762       (default makedepend limitation for AD built).
763     - use cyrus_makedepend in adjustment.128x64x1 (so that it still tested).
764    o pkg/diagnostics:
765     - add run-time parameter "useMissingValue" (def=False) to fill land-point
766        (i.e., where mask=0) with MissingValue ; used only in MNC output file.
767       This replaces CPP-option DIAGNOSTICS_MISSING_VALUE.
768     - Extend the use of "missing_value" setting from data.diagnostics for the case
769       of counter-diagnostics (where fraction-weight is zero). This applies both to
770       MNC and MDS output files.
771    o pkg/seaice/seaice_growth.F:
772      - add 'a priori' cap of latent heat flux based on actual mass considerations
773        when SEAICE_ADD_SUBLIMATION_TO_FWBUDGET is used in conjunction with the
774        non-legacy seaice_solve4temp.
775      - add diagnostic of the residual sublimation freshwater flux (the freshwater
776        flux taken from the ocean if the total actual latent heat fluxes exceed
777        the maximum)
778      - remove the CPP switch around the *_FWbySublim unit change and move diagnostic
779       fill for SIatmQnt, SIfwSubl, SIatmFW to the end of seaice_growth.F.
780      - add diagnostic of the actual sublimation freshwater flux (that is 0. ifndef
781       SEAICE_ADD_SUBLIMATION_TO_FWBUDGET) and of the latent heat flux (evap+sublim).
782      - bug fix : frWtrAtm needs a_FWbySublim ifdef SEAICE_ADD_SUBLIMATION_TO_FWBUDGET.
783      - bug fix : missing part to Martin's r_FWbySublim pathological case fix.
784    o verification 1D_ocean_ice_column:
785       made model domain truly 1x1x23 instead of 5x5x23 with only center cell (3,3,:) wet
786       update results
787    o pkg/diagnostics:
788     - Implement setting of "Post-Processed" diagnostics (corresponding to gdiag(5)='P')
789       which are not filled-up but computed from other diags ; In this case, the mate
790       diag points to the primary (filled-up) diag to used for post processing.
791     - Update Velocity-potential computation using post-processed diag framework.
792     ==> Change the ordering of fields and time-periods in MDS output file
793       when using periodic averaging: now writes one time record with the full set
794       of fields for this time period, then the next time reccord (it used to be
795       one field with the full set of time records then the next field).
796         Note: this is now similar to NetCDF (MNC) output file. <==
797    
798    checkpoint62z (2011/06/21)
799    o adjoint monitor:
800     - Add adjoint monitor output for packages exf, seaice
801       and update relevant testreport output
802    o pkg/seaice:
803     - re-order diags inits so that they appear in order in available_diagnostics.log
804     - added diags: hsnow thermo. rates of change, area preceeding ridiging process,
805       area/heff/hsnow preceeding thermodynamic growth/melt.
806     - modified diag: SIdA; output actual effect, as the description states.
807     - modified description: SIqneti, SIqneto, SIuheff, SIvheff, SIdAb*, HSNOW.
808     - retired redundant diags: SIyneg, SIfice, SIsnwice, SIthdgrh.
809       (SIyneg->SIdHbOCN; SIfice->SIdHbATC; SIsnwice->SIdHbFLO;
810        and SIthdgrh->SIdHbOCN+SIdHbATC+SIdHbATO)
811     - modified diags (2) : switch all SIdA*, SIdH*, SIdS* from delta to rates.
812     - added diagnostics for seaice generic tracers (SItr*).
813     - added SItrUnit and SItrNameLong run time param (for SItr* diags).
814     - in diag names, replaced 'PrTh' abbrev. of 'preceeding thermo' with 'PT'.
815     I. Fenty: 18-Jun-2011:
816     Minor changes to seaice package:
817     1) Retired old variables (A22, SEAICE_lhsublim, areaMax, areaMin, hiceMin) and
818        added some new ones (SEAICE_area_reg, SEAICE_hice_reg, SEAICE_area_floor)
819       - Differentiated "regularization variables" from "floor variables"
820        * areaMin became SEAICE_area_reg (old A22) and SEAICE_area_floor
821        * hiceMin became SEAICE_hice_reg (old hiceMin)
822          (with _reg meaning regularization variable)
823       - SEAICE_lhSublim becomes lhSublim, the sum of SEAICE_lhEvap and SEAICE_lhFusion
824        so as to ensure energy conservation when going between phases
825      - A22 was not used anywhere
826     2) Changed regularization procedure for heffActual and hsnowActual to ensure
827        well-boundedness and smooth adjoint in seaice_growth.F
828     3) Fixed a bug where seaice_solve4temp would not recognize ice-free grid cells
829        because the old regularization always set heffActual >= 0.05 cm
830     4) Changed the model so that the default behavior is to put a small (10^-5) "floor"
831        on AREA when HEFF > 0.
832      - went from requiring ALLOW_PRECLUDE_INFINITESIMAL_AREA to be defined to
833        requiring that DISABLE_AREA_FLOOR *not* be defined
834     Affected verifications:
835      - 1D_ocean_ice_column (output.txt output_adm.txt)
836      - global_ocean.cs32x15 (output.seaice.txt output_adm.seaice.txt)
837    o pkg/diagnostics:
838      - move MNC code from diagnostics_out.F into new diagnostics_mnc_out.F (2 S/R).
839      - rename S/R GETDIAG to DIAGNOSTICS_GET_DIAG and change type of 1rst argument
840        (was _RL, now integer) with option = 0 to retrieve all levels.
841      - add pieces of code to compute velocity potential at each level (new diagnostics
842        PhiVEL, works only when UVELMASS & VVELMASS are also turned on);
843        for now, using same params as CG2D (target-resisual, max Nb of iter ...).
844      - fix few issues with counter diagnostics in diagnostics_setdiag.F &
845        diagstats_setdiag.F (if diagnostic counter is itself a counter diag)
846        and in diagnostics_fract_fill.F (do not need a valid pointer for the
847        diagnostics counter-mate); check that definition of counter-diagnostic
848        includes a valid counter-mate (in diagnostics_set_levels.F).
849    o model/src (rStar):
850      - add rStar scaling factor in diags_phi_hyd.F (similar to calc_grad_phi_hyd.F);
851        affect solution only if z* with full pressure in EOS;
852        update output of test-exp global_ocean.90x40x15.
853    o pkg/seaice:
854      - introduce siEps=1e-5 parameter
855      - use areaMax in AREA update (part 4), consistent with ridging step (part 2.5).
856      - re-organize SEAICE_ADD_SUBLIMATION_TO_FWBUDGET code.
857      - introduce ALLOW_SITRACER and seaice_tracer_phys.F to handle generic seaice tracer.
858        For now it covers, and was tested for, ice salinity and age (attached to HEFF),
859        as well as ice cover age and ridging index (attached to AREA).
860        For now the run time parameters (in data.seaice/SEAICE_PARM03) are
861        SItrName (e.g. 'age') and SItrMate ('HEFF', which is the default, or 'AREA').
862        Up to SItrMaxNum=3 tracers can be used simultaneously.
863    o pkg/salt_plume:
864      -introduce SPsalFRAC run time parameter that sets the fraction of the
865       salt by-product of ice growth (SPsalFRAC*(1-SIsalFRAC)*salt typically)
866       that gets vertically redistributed (fluxed down) by pkg/salt_plume.
867    o model debug options:
868      - Switch reading of debugMode from S/R INI_PARMS (parameter file "data", stored
869        in PARAMS.h) to S/R EESET_PARMS (parameter file "eedata", stored in EEPARAMS.h).
870      - Refine debug-msg printing selection (3 new levels):
871        debugMode  : controls printing of debug messages (sequence of S/R calls).
872        debugLevel : controls printing of algorithm-relevant auxiliary/debug messages
873         debLevZero =  0 ; /* level of disabled aux. msg printing */
874         debLevA =  1 ; /* level of minimum  aux. msg printing */
875         debLevB =  2 ; /* level of low aux. print (report read-file opening)*/
876         debLevC =  3 ; /* level of moderate debug prt (most pkgs debug msg) */
877         debLevD =  4 ; /* level of enhanced debug prt (add DEBUG_STATS prt) */
878         debLevE =  5 ; /* level of extensive debug printing */
879        New debugLevel default: with default debugMode value (=F),
880          = 2 (debLevB) or = 1 (debLevA) in case ALLOW_AUTODIFF is defined.;
881          and if debugMode=T, default debugLevel = 4 (debLevD).
882        Relation with previous settings:
883         debLevB (=2) corresponds to former debLevA (=1)
884         debLevD (=4) corresponds to former debLevB (=2)
885        Note:
886         a) if debugLevel=0, skip WRITE_GRID call when nIter0 > 0 (same as before);
887         b) default debugLevel=1 is convenient in AD runs (avoid many file opening msgs);
888            to recover previous default, set debugLevel=2 (e.g. AD-test hs94.1x64x5)
889      - Add new parameter (printResidualFreq, read from PARM02 namelist) to print
890        detailed CG solvers convergence; off (=0) by default, except if debugLevel=5.
891    o pkg/obcs:
892      - change OBCSfixTopo default from True to False (should not change the results);
893        keep OBCSfixTopo=T in verification-exp. seaice_obcs.
894    o pkg/thsice:
895      - fix bug in thsice_calc_thickn.F (was introduced in version 1.18) in
896        2nd layer seaice sublimation (unlikely to happen)
897      - use Interior mask for OBCS in thsice_advection.F (similar to what is
898        done in gad_advection & seaice_advection).
899    o adjoint:
900      bug fix spotted by Gael Forget:
901      seaice_advection and thsice_advection still had
902      legacy CPP options to avoid CS corner updates for adjoint
903    o pkg/seaice:
904      => Change some of the defaults (2011/05/29):
905         - change SEAICEuseFluxForm default (from False to True)
906         - change DIFF1 default (from 0.004 m/s to 0. m/s)
907         And print warnings if DIFF1 is not set in data.seaice and centered
908          avection scheme is used without any diffusion.
909      also:
910      - fix seaice_diffusion calls in default AdvScheme part of seaice_advdiff.F;
911      - set SEAICEdiffKh[] default in the same way as SEAICEadvSch[]
912      - stop if DIFF1<>0 with SEAICEadvScheme <> 2, if DIFF1<>0 with any
913        other non-zero SEAICEdiffKh[] diffusivity, if SEAICEadvSalt=T with
914        #undef SEAICE_VARIABLE_SALINITY, if SEAICEadvAge=T with #undef SEAICE_AGE.
915      update results of test exp.:
916         lab_sea: output.fd (switch to AdvScheme=33 with diffKh=20)
917             output.hb87, output_adm.evp (SEAICEuseFluxForm=T and diffKh=200)
918             output_adm.noseaicedyn (SEAICEuseFluxForm=T)
919         offline_exf_seaice: output.seaicetd, output_adm (SEAICEuseFluxForm=T)
920         seaice_obcs: output (SEAICEuseFluxForm=T)
921      and prescribe old default for SEAICEuseFluxForm (=F) and DIFF1 (=0.004)
922          for standard fwd & AD lab_sea tests (to keep the same output).
923    o pkg/seaice/seaice_growth.F:
924      - use Ian Fenty's capping formulas for actual ice
925      thickness thoughout EVOLUTION branch.
926      - put treatment pathological case #2) in CPP brackets
927      (ALLOW_AVOID_INFINITESIMAL_AREA, undef by default).
928      - update global_ocean.cs32x15 and 1D_ocean_ice_colum results accordingly.
929    o pkg/seaice:
930      - seaice_diffusion.F : remove the min(DX,DY) factor permanently;
931      pass the Laplacian diffusivity (in m^2/s) diffKh as a parameter;
932      also pass fac as a param, which can be 1. (to update the tendency
933      field) or the time step (to update the field itself).
934      - seaice_advdiff.F: for multidim, call seaice_diffusion with
935      e.g. SEAICEdiffKhHeff and with fac=1; for single-dim, call
936      seaice_diffusion with e.g. SEAICEdiffKhHeff and with fac=time step.
937      - SEAICE_PARAMS.h, seaice_readparms.F, seaice_check.F :
938      hooks to handle SEAICEdiffKhHeff, SEAICEdiffKhArea, etc.
939    o pkg/seaice:
940      diffusion with centered advection scheme (diffus.F & advect.F):
941      - simplify S/R DIFFUS (put deltaT & DIFF1 factor outside, move EXCH outside)
942        to just compute the laplacian of input-field.
943      - unroll k loop (harmonic,biharmonic diff) in advect.F to save 1 exch call.
944      - fix flux-form version in diffus.F to conserve tracer.
945      update output of lab_sea.fd & lab_sea.hb87 (1rst set of modif affects
946       machine truncation) and lab_sea.salt_plume (conservative flux-form modif)
947    
948    checkpoint62y (2011/05/26)
949    o pkg/seaice:
950     - seaice_growth.F : in EVOLUTION branch, always include
951       a_QSWbyATM_cover in qnet (as it should be).
952     - verification/global_ocean.cs32x15 : update results accordingly
953       (output.seaice.txt output_adm.seaice.txt).
954    o pkg/seaice + obcs:
955     - use maskInW & maskInS in multi-dim advection and biharmonic diffusion:
956       equivalent of assuming no tracer gradient outside the OB region.
957       update output of seaice_obcs (uses DIFF1 <>0 => biharmonic diffusion)
958     - remove calls to OBCS_COPY_TRACER after EXCH calls (no longer needed
959       after changes above);
960     - obcs+seaice cleaning: apply seaice-tracer OB values to tracer field
961       only at OB location (instead of over a band of OLx width).
962    o pkg/seaice:
963     - fix wrong indices in old (non Flux-Form) diffusion default S/R diffus.F
964       (dxG(I+1, ...) changed to dxG(I, ...), no impact on Lat-Lon grid)
965    o pkg/obcs:
966      - split header file "OBCS.h" into 4 separated files:
967        OBCS_PARAMS.h, OBCS_GRID.h, OBCS_FIELDS.h & OBCS_SEAICE.h
968       Note: OBCS_PARAMS.h & OBCS_GRID.h can be included without OBCS_OPTIONS.h
969         (contain no conditional statement which depends on OBCS options).
970      - move "useOBCSYearlyFields" from "data.obcs" (hold in OBCS_PARAMS.h)
971        to parameter file "data.exf", namelist EXF_NML_OBCS (in EXF_PARAM.h).
972    o ctrl, cost, grdchk & autodiff pkgs:
973      - make options file more standard (like other {PKG}_OPTIONS.h file but
974        with AD_CONFIG.h); clean-up some of the included header files.
975    o pkg/obcs:
976      - do not mask tracer when applying OB (tracer == 0 could generate problems)
977      - apply tracer OB values to tracer field only at OB location (instead of
978        over a band of OLx width)
979      - clean-up obcs_apply_w.F & obcs_apply_eta.F (since less calls to these S/R)
980      - remove OBCS_MULTIDIM_OLD_VERSION code in gad_advection.F and remove
981        obcs_apply_tloc.F & obcs_apply_sloc.F
982    o obcs in model/src:
983      - call OBCS_APPLY_W only if NonHydrostatic.
984      - call OBCS_APPLY_ETA only if NonLinFreeSurf.
985      - reset dEtaHdt and wVel to zero outside OB interior region ;
986      - leave tracer unchanged outside OB interior region: This has no effect
987        on the solution but just to prevent unrealistic tracer value outside OB.
988      - zero out velocity outside OB interior region: This has no effect on
989        the solution but just to prevent unrealistic velocity outside OB.
990    o obcs and non-lin free-surf:
991       move call to OBCS_APPLY_R_STAR from update_r_star.F to calc_r_star.F
992       and call to OBCS_APPLY_SURF_DR from update_surf_dr.F to calc_surf_dr.F
993       + add argument "etaFld" to OBCS_APPLY_R_STAR & OBCS_APPLY_SURF_DR:
994       this fixes missing EXCH + get consistent eta OB value (+ fix restart).
995       update results of test-exp. exp4(nlfs).
996    o exp4 (nlfs) test-exp:
997       use OBC for Eta at Western & Eastern OB (to test prescribing Eta
998       with NonLin-FreeSurf); update output.nlfs.txt
999    o obcs and 2d/3d solver norm:
1000       use interior masks (maskInC) to cancel out cg2d & cg3d matrix coeff at OB
1001       and outside OB interior region (will allow to place OB further inside the
1002       domain). Depending on the domain, can affects cg2d-Norm (previous
1003       cancellation outside OB was only partial), e.g. in exp4 & obcs_ctrl,
1004       and cg3d-Norm (previous Norm was computed before canceling OB terms),
1005       e.g. in tutorial_plume_on_slope.
1006      - update output of exp.: exp4 (x2), obcs_ctrl and tutorial_plume_on_slope.
1007    o pkg rbcs:
1008      - split RBCS.h into 3 files: RBCS_SIZE.h, RBCS_PARAMS.h & RBCS_FIELDS.h
1009      - add capability to apply relaxation to horizontal velocity uVel & vVel.
1010    o pkg/grdchk: add gradient check for control variable xx_shifwflx
1011    o pkg/shelfice/shelfice_init_fixed.F
1012      fix CPP-flag combinations
1013    o pkg/seaice: Merge iceage code of Pierre Rampal
1014      * update/change/correct ice age calculations
1015      * add age updates for pathological cases
1016      Probably needs more testing...
1017    
1018    checkpoint62x (2011/05/13)
1019    o pkg/mom_vecinv:
1020       high-order vorticity scheme: use interior masks (maskInW & S)
1021       to zero-out (outside OB) gradient of vorticity.
1022    o verification exp.:
1023       turn on "useEnergyConservingCoriolis" (better discretisation) in exp.
1024       hs94.128x64x5 and seaice_obcs ; update results.
1025    o pkg/obcs:
1026      fix bug in OBeta for YZ sections in obcs_exf_load.F
1027    o pkg/ctrl, pkg/shelfice, and optim:
1028      - add new control variable xx_shifwflx (fresh water flux underneath ice
1029        shelves). This is almost as tedious as obcs-ctrl, because the
1030        variables needs its own mask.
1031      - add a cost function term that penalizes the deviation of xx_shifwflx
1032        from the first guess (zero) in analogy to other control variables
1033    o pkg/shelfice:
1034      - start basic adjoint
1035    o pkg/ctrl:
1036      - remove extra 2D field "for good measure" when initializing in
1037        ctrl_set_globfld_[xy/xz/yz].F
1038    - replace hard coded precision 32 (a bug) in ctrl_map_ini_gen by ctrlprec    - replace hard coded precision 32 (a bug) in ctrl_map_ini_gen by ctrlprec
1039    - improve error messages in ctrl_set_unpack_*    - improve error messages in ctrl_set_unpack_*
1040  o OBC implementation in momentum:  o OBC implementation in momentum:
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