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revision 1.1533 by jmc, Thu Nov 10 21:04:47 2011 UTC revision 1.1626 by jmc, Sun Mar 18 23:29:55 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 momentum:
8      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
9        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
10        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
11    
12    checkpoint63k (2012/03/17)
13    o model/src:
14       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
15         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
16       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
17         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
18    o model/src: solve_*diagonal.F
19       - replace division with multiplication by inverse (similar to original version)
20         update output of AD exp. global_ocean.90x40x15.
21       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
22         to enable the use of the vectorized & differentiable solve_tridiagonal.F
23       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
24         vertical advection (to get solve_tridiagonal tested in AD mode).
25    o pkg/seaice: ECCO-CLIVAR merge:
26      1. seaice AREA relaxation
27         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
28         * runtime flag: SEAICE_tauAreaObsRelax
29      2. modified global mean cost imbalance code: CPP option
30          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
31    o another iteration on solve_*diagonal.F
32       Make choices independent of AUTODIFF
33       Default will be the adjoinable vectorized version.
34       Alternative choices are:
35       * non-adjoinable original version with low memory footprint:
36         #define SOLVE_DIAGONAL_LOWMEMORY
37       * still adjoinable but does not vectorize (k as inner-most loop):
38         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
39    o testreport
40     - add option to use a home made wrapper around "make"
41     - remove MITGCM_IEEE env. variable (no longer active)
42    o pkg/shelfice
43     - improve computation of friction velocity for velocity dependent
44       exchange coefficients: include velocities into SHELFICEBoundaryLayer
45       block to average velocities vertically
46     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
47    o Modify diagonal solvers, now three versions (upon request):
48      #ifndef SOLVE_DIAGONAL_AUTODIFF
49        1. default version (dating back a while ago)
50      #else /* def SOLVE_DIAGONAL_AUTODIFF */
51      # ifdef SOLVE_DIAGONAL_KINNER
52        2. adjoinable version with k-innermost loop (G. Forget)
53      # else
54        3. adjoinable vectorized version of 2.
55      # endif
56      #endif /* SOLVE_DIAGONAL_AUTODIFF */
57      All flags are currently set within routines, but could/should be moved to CPP-options.
58      Array bounds for 1. are as before, for 2.,3. cover the entire domain
59      (could be changed for 1. too).
60    o verification/lab_sea (fwd):
61      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
62        use 7 categories (except hb87), new solve4temp params (except salt_plume),
63        constant salinity (=4) or variable salinity (salt_plume) done through
64        SItracer.
65    o pkg/seaice:
66      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
67      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
68         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
69        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
70        SEAICE_freeze got retired) but already better than previously with
71        SEAICE_freeze=123456.7 deg.C;
72      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
73        (safer multi-threaded setting); always set SEAICEuseEVP;
74      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
75        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
76        stop if multiple specifications for the same coeff; make sure default
77        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
78    o pkg/obcs:
79      - allow to switch to upwind 1rst order advection scheme for the advective
80        flux computation at the open-boundary; disabled for adjoint built.
81    o pkg/ptracers:
82      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
83      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
84      - add parameter to decide when to start a tracer; use internal flag to
85        know which tracer to step-forward; switch this internal flag at the top
86        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
87        for adjoint built.
88    o pkg/seaice:
89      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
90      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
91      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
92    o pkg/ecco:
93      - fix writing of output file DiagnosCost_ClimSalt/Theta
94        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
95    o pkg/seaice:
96      - add missing initialisation of COR_ICE array in dynsolver.F
97      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
98        compiled either way, and is tested in all exps (multidim was only tested
99        in lab_sea ad before).
100      - cosmetic change to prepare for future addition of ITD. no change to results.
101        no defaults change.
102      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
103      - by lack of adequate verification experiments, I further used custom versions
104        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
105        should be correct.
106      - avoid recomputations in ad.
107    o array initialisation in adjoint mode:
108      1) pkg/mom_common/mom_calc_ke.F:
109        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
110        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
111        part this initialisation is gone, resulting in Floating Point Exception
112        (caught by open64 compiler with debug option).
113      2) model/src/convective_weights.F
114        set output convectCount over the full array range (instead of doing
115        an update): this fix a similar issue when called within recomputation (adjoint)
116        which could by-pass the initialisation (normally done in the caller S/R).
117    o pkg/seaice:
118      - final version of turbulent flux params, as agreed at MIT ice meet:
119           SEAICE_mcPheePiston (default is ~ 0.000875)
120           SEAICE_mcPheeTaper (default is 0.)
121           SEAICE_frazilFrac (defualt is 1.)
122           SEAICE_mcPheeStepFunc (default is false)
123      - changes results at trunction error level
124      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
125    o added pkg/frazil:
126      - see frazil_description.tex for details
127      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
128    o pkg/shelfice/shelfice_thermodynamics.F
129      - fix exponents for velocity dependent exchange coefficients: change
130        from 2/3(=0) to 0.66666666666666667
131      - move computation of velocity dependent exchange coefficients into
132        separate loop, so that it applies to both thermodynamics
133      - move some divisions by constants out of loops
134    
135    checkpoint63j (2012/02/16)
136    o pkg/seaice:
137      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
138      - SItracer:  added run time params, and allow coupling to ocn salinity.
139    o pkg/seaice: remove (almost) all divisions by constants within loops
140      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
141      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
142      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
143      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
144    o pkg/seaice :
145      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
146        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
147      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
148      - add permanent SItflux diag that corresponds to TFLUX but includes
149        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
150      - allow activation/testing of a fix for suspected missing term in
151        ocn-ice heat budget (to be confirmed). To test this, you want to
152        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
153        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
154      - no change in results, fwd or ad.
155    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
156      - switch to variable freezing point.
157           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
158      - bug fix : the sublimation term that was missing is now activated.
159           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
160      - bug fix : flooding sign term for SIsal0.NE.0.
161           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
162    o pkg/seaice:
163      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
164        is now the default, and the old default constant freezing point is recovered
165        with SEAICE_tempFrz0    = -1.96,
166             SEAICE_dTempFrz_dS = 0.,
167      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
168      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
169      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
170        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
171      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
172        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
173      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
174        seaice_growth r149 for legacy branch (no results change).
175      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
176        from I. Fenty).
177      - results did not change except for global_ocean.cs32x15, mostly due to the
178        switch to variable freezing point (see above item for detail).
179    o pkg/thsice:
180      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
181        seawater freezing in thsice_calc_thickn (not used).
182    o pkg/seaice: turbulent flux term specification via run time params.
183      - replace CPP switches with run time switches to facilitate testing
184      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
185                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
186      - added runtime parameter : SEAICEturbFluxFormula
187      - move Mcphee constants to SEAICE_PARAMS.h
188      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
189                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
190                 remove seaice_summary call (moved to seaice_init_fixed)
191      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
192        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
193      - seaice_summary.F : add missing report of read turbulent flux term set up
194                           and SITRACER.
195      - seaice_check.F : check range; inform and stop if retired CPPs are used
196                         (incl. SEAICE_AGE).
197      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
198             CPP switch, same computation as before for the different options.
199      - change results at the truncation level.
200    o pkg/seaice:
201      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
202        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
203        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
204      - update verification/*/input*/data.seaice:
205        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
206        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
207        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
208        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
209    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
210      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
211        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
212        difference in results only due to machine truncation.
213      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
214        MaykutPolySatVap; keep MIN_LWDOWN.
215      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
216      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
217        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
218    o pkg/salt_plume:
219      - isolate saltPlumeFlux array exch into a specific S/R called from
220        do_oceanic_phys.F
221      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
222    o verification:
223      - move untested set-up to MITgcm_contrib/verification_other.
224    o pkg/seaice:
225      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
226    o pkg/seaice:
227      - seaice_solve4temp.F (keeping results unchanged):
228        * add 2 future run-time params to select which saturation vapor pressure
229          formula is used and how post-iteration fluxes are set.
230          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
231        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
232          the linearized expression to stay consistent with tsurf finding.
233      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
234        can be < 0.
235    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
236      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
237        conductive heat flux F_c , and add it explicitly when updating tsurf as
238        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
239        so that now F_ia has a consistent meaning through the entire routine.
240        This causes differences at truncation level: update output of fwd exp.
241        global_ocean.cs32x15.seaice.
242    o pkg/seaice:
243      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
244        of arrays, sign/direction of fluxes; no effect on results.
245      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
246        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
247        note: this should have been done before changing celsius2K default.
248      - to keep results unchanged, add back old value of celsius2K in verification
249        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
250      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
251        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
252        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
253        freezing temp is consistent with value in seaice_growth.F ; this causes
254        differences at machine truncation level: update lab_sea AD output (3/4).
255    o pkg/seaice:
256      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
257        and climsst/sss even when using seaice (to prevent calculation that might
258        use SST on land); does not affect any verification exp.
259      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
260        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
261    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
262      over land (non-legacy code)
263    o vectorize salt_plume package:
264      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
265      - this code computes plumebk everywhere (also over land), thus requires
266        code to avoid divisions by zero and catch the case of kLev=Nr.
267      - efficiency of salt_plume_frac is still sub-optimal
268    o tools (genmake2):
269      - fix makefile NAME specification (option: -makefile NAME) by adding
270        "-f $MAKEFILE" in few places where it was missing including makedepend
271        command (contribution from Paul).
272    
273    checkpoint63i (2012/01/24)
274    o model/src:
275      - add factorized versions of some EOS code to find_rho.F,
276        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
277    o model/src:
278      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
279      - change default celsius2K from 273.16 to 273.15
280      - to keep results unchanged, add back old value of celsius2K in verification
281        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
282         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
283    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
284      to make TAF generate vectorizable code
285    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
286       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
287       have flags that do this more efficiently.
288    o pkg/diagnostics/diagstats_calc.F
289      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
290    o pkg/obcs (with exch2):
291      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
292        and remove code (in obcs_readparms.F) which was based on EXCH of indices
293        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
294    o pkg/exf and seaice exp:
295      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
296        so that switching off area & heff advection flags does not affect results.
297      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
298      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
299        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
300        results of verification experiments: 1D_ocean_ice_column(fwd),
301        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
302        and offline_exf_seaice (all 4).
303    o pkg/seaice:
304      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
305        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
306      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
307        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
308        not multi-dim advection;
309      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
310        SHORTWAVE_HEATING #undef.
311    o optim: make Makefile more robust (?)
312    o pkg/obcs:
313      * fix treatment of obcs_read_pickup for TAF
314    o pkg/shelfice:
315      * add missing initialisation of num_shifwflx
316      * new adjoint verification exp. for isomip
317      * change Prandtl and Schmidt numbers from generic formulations
318        (in terms of model diffus. and visc.) to separate runtime
319        parameters, with Holland and Jenkins (1999) default values.
320    o pkg/exf (interpolation):
321      - extended input field (2 rows) near the N & S poles:
322        * fill in with the symetric value (when even Nb of data in longitude)
323        * add average value at the poles only for scalar quantities ; for vector
324          component interpolation, skip the averaging and keep duplicated values,
325          unless the 2 components have same location (uvInterp=T) in which case
326          interpolate the 2 components together using S/R EXF_INTERP_UV.
327      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
328        together: this allows to account properly for local orientation when
329        averaging at N & S pole.
330      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
331        exf-interpolation near N & S poles. Undef by default.
332      - add debug check/print on 1rst iter if debugLevel >=2.
333    o pkg/exf:
334      - change masking flags definition (no longer "parameter"), put them in
335        common block and set them in S/R EXF_INIT_FIXED.
336      - change recognized masking flag from s,u,v to c,w,s since the mask
337        to use (maskC,W,S) depends on position on model grid and has little to
338        do with scalar/vector difference; fix masking if using P-coordinates.
339      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
340        and update results of exp. global_with_exf (x2).
341      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
342    o pkg/obcs
343      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
344    o pkg/exf (interpolation):
345      - assume periodicity in X only if input field cover full longitude range.
346      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
347        and should vectorise).
348      - fix input lat of the 2 added row (in case we provide N.pole data).
349    
350    checkpoint63h (2011/12/30)
351    o pkg/seaice:
352      - change declaration of UVM from _RL to _RS in order to get B-grid
353        uIce,vIce monitor when _RS = real*4
354    o pkg/offline:
355      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
356      - compute vertical velocity if not read from file (switch on exactConserv
357        & staggerTimeStep);
358      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
359    o verification:
360      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
361        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
362        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
363      - update output of exp. global_ocean.cs32x15.viscA4 after changing
364        grid-file angles (used here for coriolis-3d);
365      - remove (or gzip) few files not needed to run fizhi-cs experiments.
366    o pkg/exf (vector interpolation):
367      - rotate vector component toward local grid-axis orientation using grid-angles
368        (stored in GRID.h) instead of locally computed rotation angle; keep old code
369        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
370    o pkg/seaice:
371      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
372        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
373    o pkg/PKG_OPTIONS.h files:
374      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
375        outside of the #ifdef ALLOW_THISPKG / #endif block.
376      - update verification/*/code/PKG_OPTIONS.h files.
377    o add a verification experiment (offline_exf_seaice/input.seaice) that test
378      the B-grid LSOR solver
379    o pkg/seaice: sort out emissivity and long wave radiation step 2:
380      - add emissivity for snow and ice as new run-time parameters
381        (unfortunately) that default to the corresponding exf values; this
382        changes results in most verification experiments so that for backward
383        compatibility these parameter have to be set explicitly to inconsistent
384        values (ugly);
385      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
386        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
387        until we agree how to handle this bug properly
388    o pkg/exf (interpolation):
389      - add a set of run-time param ({inputfield}_interpMethod), one for
390        each interpolated input field, to select the interpolation method
391        with a value of zero switching off the interpolation;
392      - print interpolation parameters to standard output;
393      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
394        (to use instead runoff_interpMethod=0 in data.exf).
395      - simplify default setting of interpolation parameters (for all fields,
396        set position to match model grid cell-center position, leading to trivial
397        interpolation in case of regular Lat-Lon grid) and fix for the case of
398        non-uniform delY.
399    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
400       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
401       this factor is absolutely required, because the lw exitance (= out-going
402       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
403       where the reflectivity rho = 1-emissivity for conservation reasons. Once
404       this is established, we can remove the CPP-Flag (if we want to).
405    o pkg/seaice:
406      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
407        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
408      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
409        what the name implies (and not emissivity*BoltzmannConstant), this means
410        the old default value of 5.5e-8 now means
411        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
412        S/R exf_readparms
413      - FV-discretization of the B-grid LSOR solver, turn on with
414        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
415        of the calling routine dynsolver, so that B and C-grid code look a
416        little more alike.
417      - fix index bugs in ostres.F (B-grid code)
418    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
419    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
420      default for SEAICE_emissivity, if useEXF; requires setting a wrong
421      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
422      backward compatiblity
423    o model/src: use sigmaR in calc_ivdc
424    
425    checkpoint63g (2011/12/16)
426    o pkg/seaice/seaice_growth.F:
427      fix heat conservation of the coupled ocean-seaice system.
428      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
429      solid vs liquid water treatment is resolved via QNET.
430    o pkg/seaice/seaice_growth.F:
431      add missing term for sublimation in saltFlux, which was breaking conservation.
432    o pkg/seaice/seaice_model.F:
433      Remove this patholigical case treatment in evolution branch,
434      where it is un-necessary and breaks conservation.
435      Update global_ocean.cs32x15/results accordingly for
436      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
437    o model/src:
438      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
439      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
440    o pkg/obcs:
441      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
442      tendency for temperature and salinity that is then applied to update
443      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
444      horizontal advection and diffusion contributions on the boundary (in
445      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
446      removing the mask in S/R timestep_tracer. The advantage of this approach is
447      that the updated tracer values include contributions from the surface
448      forcing and vertical diffusion.
449      This modification changes exp4.stevens because of vertical diffusion.
450    o model/src:
451      change non-curvilinear grid setting to also work with exch2 + blank tiles:
452      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
453        face dimensions.
454      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
455        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
456        and INI_SPHERICAL_POLAR_GRID.
457      change test-experiment global_ocean.90x40x15:
458      - split the domain in many more tiles (9x4 tiles of 10x10 each);
459      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
460      - update results of both test (std & dwnslp).
461    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
462       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
463    o model/src:
464      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
465        and fix initialisation when using sigma-coords.
466    o model/src:
467     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
468       to their current value at the beginning of forward_step.F": add a new run-time
469       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
470     - set doResetHFactors=T in the following test exp:
471        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
472        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
473        and tutorial_global_oce_in_p (nonLinFS in p)
474    o pkg/ecco
475      - added IES cost term
476    o verification/advect_xz
477      - scale down the depth by 1/100 (from 200 km to just 2.km)
478      - add secondary test using divergent flow, r-star and implicit vertical advection.
479      - add note (check_conserve_TS.txt) and matlab script to check global
480        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
481    o pkg/rbcs:
482      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
483    o pkg/obcs (Stevens BCs):
484      - fix various problems in the phase speed computations of the Stevens
485        boundary conditions:
486        - sign error for western and southern boundaries,
487        - time tendencies were underestimated by factor of dTracerLev and some just
488          zero (for multidim advection schemes) -> now estimate time tendencies
489          from difference between previous (n) time level and the one before (n-1);
490          this requires storing a field per tracer per boundary, also in the pickup
491          files.
492        - replace deltaTmom in cflMer/Zon computation with dTracerLev
493        - set default phase velocity to cflMer/Zon
494      - update verification experiment exp4.stevens
495    o pkg/generic_advdiff (implicit_r):
496      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
497        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
498      - fix implicit vertical diffusion or advection with NonLin FreeSurf
499        (was using current recip_hFacC instead of future recip_hFacC): set future
500        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
501        solver S/R ;
502      - fill diagnostics of vertical advective fluxes (computed from tendency)
503        when using implicit vert. advection;
504      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
505         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
506         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
507         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
508    o pkg/diagnostics:
509      - add diags for T & S tendency which goes through Adams-Bashforth.
510    
511    checkpoint63f (2011/11/30)
512    o pkg/obcs/obcs_calc_stevens.F:
513      - join some loops to reduce number of if-statements
514      - fix a bug in code for northern and southern boundaries.
515    o pkg/seaice/seaice_init_varia.F
516      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
517        caused zero ice-velocities for the B-grid code
518    o pkg/seaice/seaice_init_fixed.F
519      - fix a bug in the initialisation of the second metric terms
520        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
521      - this affects all seaice configurations with useCurviLinearGrid = .true.
522        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
523        = .true. (default)
524      - the only verification experiment affected is global_ocean.cs32x15:
525        icedyn, seaice, and seaice_dynmix (AD)
526    o pkg/thsice/thsice_diagnostics_state.F
527      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
528        not contain garbage that can lead to surprises in diagstats_calc.F
529    o model/src:
530      - move bi,bj loops inside INTEGR_CONTINUITY ;
531      - call INTEGR_CONTINUITY directly from forward_step.F
532        (previously called from momentum_correction_step.F)
533      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
534        forward_step.F and pkg/ecco/the_main_loop.F
535  o model/src/do_oceanic_phys.F:  o model/src/do_oceanic_phys.F:
536    - reset addMass to zero only if useICEFRONT ;    - reset addMass to zero only if useICEFRONT ;
537    - separated k-loop for rhoInSitu calculation ;    - separated k-loop for rhoInSitu calculation ;

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