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revision 1.1573 by jmc, Sat Jan 14 16:41:36 2012 UTC revision 1.1650 by jmc, Wed Apr 11 18:17:42 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 model/src:
8     - define internal flag "uniformFreeSurfLev" (=T when free-surface level-index
9       is everywhere k=1) to speed-up some calculations (by pass kSurf reference);
10       temporary set to usingZCoords value (to be changed to F when using shelfice).
11     - hydrostatic pressure: implement partial cell near the surface also for
12       Z-coordinates (for the case where uniformFreeSurfLev=F); replace test on
13       usingZCoords with test on uniformFreeSurfLev where needed (in NonHyd code).
14    o pkg/ctrl/ctrl_init.F:
15     - add a formal parameter to s/r ctrl_init_rec to print
16       xx_$(ctrl_valiable)_file for easier debugging
17     - move call of cal_* routines into the if-block where they are really
18       needed so that xx_$(ctrl_variable)_period can be 0 or -12 without having
19       to specify a startdate
20    o pkg/seaice:
21     - update comments in SEAICE_OPTIONS.h (+ similar update of lab_sea/code and
22       global_ocean.cs32x15/code versions).
23     - turn on seaice Multi-category (in data.seaice, SEAICE_multDim=7) for
24       verification experiment global_ocean.cs32x15.seaice and update results.
25    o pkg/exf:
26     - new S/R EXF_GETFIELD_START to return starting-time of a forcing field
27       (according to useExfYearlyFields).
28    o pkg/cal:
29     - move calendar setting & summary (previously in cal_readparams.F) into new
30       S/R CAL_INIT_FIXED to be called later in the initialisation process, once
31       length of the simulation is set (after SET_PARMS call); This is an attempt
32       to fix Pb when, e.g.: pkg/longstep, modifies the length of the run.
33     - For safety: keep a record of pkg/cal parameter settings status
34               to allow to STOP if one pkg/cal S/R is called too early.
35     - add a stop in all basic pkg/cal subroutines if called before setting is done.
36     - modify cal_getdate.F: stop when nothing was returned;
37       if called with myIter=-1, simply retrun modelBaseDate (1,2 = startDate_1,_2);
38       this allows to remove "cal.h" from seaice_read_parms.F & init_mnc_vars.F.
39    
40    checkpoint63l (2012/04/04)
41    o pkg/bbl:
42      - fix call to FIND_RHO_2D in bbl_calc_rho.F (case multi-tiles per proc);
43        update global_with_exf output.yearly.txt file.
44    o pkg/cal:
45      - start to clean-up cal_set.F ; fix for the case where baseTime is non-zero.
46      - remove 2 unsused and very short (1 line only) functions ;
47      - remove unsused subroutines from AD-Diff list.
48    o model/src:
49      - start to implement clean wait to stop in initialization S/R (config_check.F,
50         packages_check.F, ini_parms.F and pkg/obcs/obcs_check.F + pkg/mypackage)
51    o folowing PRINT_MESSAGE changes:
52      - remove reminder multiple print to the same file (STDOUT) when multi-threads.
53    o pkg/bbl:
54      - modification so it can work with z*
55      - replace deltaT with dTtracerLev(k) for asynchronous time stepping
56      - global_with_exf/input.yearly verification; changes output.yearly.txt
57    o eesupp/src:
58      - PRINT_MESSAGE: use OpenMP critical instruction (similar to PRINT_ERROR);
59        writing to unit 0 (if unit=errorMessageUnit) extended to the case myThid=1
60      - CHECK_THREADS: specific code if using OpenMP threading: improve checking of
61        # of threads across processors (e.g., different env OMP_NUM_THREADS setting)
62      - improve special preliminary call to EESET_PARMS (if eedata is read 2 times).
63      - when using MPI, always set usingMPI=T ; set default accordingly and stop
64        if not consistent.
65      - ALL_PROC_DIE: add a BARRIER after MPI_FINALIZE call ; skip this when thread
66        argument is zero (in case called within single-thread section).
67    o pkg/fizhi:
68        clean-up turbulence cold-start switch: decided in fizhi_init_vars.F, stored
69        in common bloc (fizhi_coms.h) and then passed as argument up to S/R TURBIO.
70    o pkg/exch2:
71      - add argument "updateCorners" to S/R exch2_get_uv_bounds (enable to
72        activate EXCH_IGNORE_CORNERS in vector EXCH S/R).
73      - switch 1rst EXCH call to IGNORE_CORNERS (instead of UPDATE_CORNERS)
74        but keep the 2nd with UPDATE_CORNERS: this prevents overwriting good data
75        with bad ones coming from a not-yet-updated halo.
76        This should fix the problem when sNx <> sNy and GCD(sNx,sNy) < 2*Olx.
77    o pkg/frazil:
78        move FrzForcT diag from frazil_diagnostics_state.F to frazil_calc_rhs.F
79        http://mitgcm.org/pipermail/mitgcm-devel/2012-March/005384.html
80    o model/src/config_check.F: add a check for OLx>sNx/OLy>sNy
81    o verification/lab_sea
82      * #undef SEAICE_EXCLUDE_FOR_EXACT_AD_TESTING
83      * #define ALLOW_SST_CONTROL & ALLOW_SST_CONTROL
84      * nTimeSteps 3 -> 4
85      * changed reference output accordingly
86    o pkg/ctrl:
87      * fix ctrl_get_gen for xx_sst, xx_sss
88    o pkg/fizhi:
89      - fix 2 calls to S/R GRD2MSC (argument igrd) in update_earth_exports.F
90        update results of exp. fizhi-cs-32x32x40 (fail with only 6 digits for cg2d)
91      - by default, use new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE);
92        fix few out-of-bounds indices in referencing vars (initialise igrd to 1);
93        clean-up fizhi_turb.F (remove unused & uninitialised qdiaglsm array).
94    o pkg/gmredi:
95      - add diagnostic of Redi (main diagnonal) vertical diffusive flux of Temp
96    o pkg/fizhi:
97      - fix few initialisation and multi-tile Pb: aqualev & gridalt now pass the
98        (old)aces open64 tuv test.
99    o pkg/icefront: fix bug and reorder loop in icefront_init_varia.F
100    o pkg/mom_vecinv:
101      - fix 1 loop range in mom_vecinv.F to be like all the other loops which
102        set/update gu,gv/Diss (fix Pb of uninitialised fVerUkp in admom_vecinv
103        with non-lin free-surf).
104    o model/src: move k-loop outside of i/j-loops when (re-)computing R_low
105      in ini/update_masks_etc.F in order to avoid -O3 optimization problems with
106      some compilers (gfortran 4.6.0 on MacOS)
107    o momentum:
108      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
109        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
110        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
111    
112    checkpoint63k (2012/03/17)
113    o model/src:
114       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
115         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
116       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
117         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
118    o model/src: solve_*diagonal.F
119       - replace division with multiplication by inverse (similar to original version)
120         update output of AD exp. global_ocean.90x40x15.
121       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
122         to enable the use of the vectorized & differentiable solve_tridiagonal.F
123       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
124         vertical advection (to get solve_tridiagonal tested in AD mode).
125    o pkg/seaice: ECCO-CLIVAR merge:
126      1. seaice AREA relaxation
127         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
128         * runtime flag: SEAICE_tauAreaObsRelax
129      2. modified global mean cost imbalance code: CPP option
130          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
131    o another iteration on solve_*diagonal.F
132       Make choices independent of AUTODIFF
133       Default will be the adjoinable vectorized version.
134       Alternative choices are:
135       * non-adjoinable original version with low memory footprint:
136         #define SOLVE_DIAGONAL_LOWMEMORY
137       * still adjoinable but does not vectorize (k as inner-most loop):
138         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
139    o testreport
140     - add option to use a home made wrapper around "make"
141     - remove MITGCM_IEEE env. variable (no longer active)
142    o pkg/shelfice
143     - improve computation of friction velocity for velocity dependent
144       exchange coefficients: include velocities into SHELFICEBoundaryLayer
145       block to average velocities vertically
146     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
147    o Modify diagonal solvers, now three versions (upon request):
148      #ifndef SOLVE_DIAGONAL_AUTODIFF
149        1. default version (dating back a while ago)
150      #else /* def SOLVE_DIAGONAL_AUTODIFF */
151      # ifdef SOLVE_DIAGONAL_KINNER
152        2. adjoinable version with k-innermost loop (G. Forget)
153      # else
154        3. adjoinable vectorized version of 2.
155      # endif
156      #endif /* SOLVE_DIAGONAL_AUTODIFF */
157      All flags are currently set within routines, but could/should be moved to CPP-options.
158      Array bounds for 1. are as before, for 2.,3. cover the entire domain
159      (could be changed for 1. too).
160    o verification/lab_sea (fwd):
161      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
162        use 7 categories (except hb87), new solve4temp params (except salt_plume),
163        constant salinity (=4) or variable salinity (salt_plume) done through
164        SItracer.
165    o pkg/seaice:
166      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
167      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
168         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
169        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
170        SEAICE_freeze got retired) but already better than previously with
171        SEAICE_freeze=123456.7 deg.C;
172      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
173        (safer multi-threaded setting); always set SEAICEuseEVP;
174      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
175        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
176        stop if multiple specifications for the same coeff; make sure default
177        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
178    o pkg/obcs:
179      - allow to switch to upwind 1rst order advection scheme for the advective
180        flux computation at the open-boundary; disabled for adjoint built.
181    o pkg/ptracers:
182      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
183      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
184      - add parameter to decide when to start a tracer; use internal flag to
185        know which tracer to step-forward; switch this internal flag at the top
186        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
187        for adjoint built.
188    o pkg/seaice:
189      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
190      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
191      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
192    o pkg/ecco:
193      - fix writing of output file DiagnosCost_ClimSalt/Theta
194        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
195    o pkg/seaice:
196      - add missing initialisation of COR_ICE array in dynsolver.F
197      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
198        compiled either way, and is tested in all exps (multidim was only tested
199        in lab_sea ad before).
200      - cosmetic change to prepare for future addition of ITD. no change to results.
201        no defaults change.
202      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
203      - by lack of adequate verification experiments, I further used custom versions
204        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
205        should be correct.
206      - avoid recomputations in ad.
207    o array initialisation in adjoint mode:
208      1) pkg/mom_common/mom_calc_ke.F:
209        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
210        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
211        part this initialisation is gone, resulting in Floating Point Exception
212        (caught by open64 compiler with debug option).
213      2) model/src/convective_weights.F
214        set output convectCount over the full array range (instead of doing
215        an update): this fix a similar issue when called within recomputation (adjoint)
216        which could by-pass the initialisation (normally done in the caller S/R).
217    o pkg/seaice:
218      - final version of turbulent flux params, as agreed at MIT ice meet:
219           SEAICE_mcPheePiston (default is ~ 0.000875)
220           SEAICE_mcPheeTaper (default is 0.)
221           SEAICE_frazilFrac (defualt is 1.)
222           SEAICE_mcPheeStepFunc (default is false)
223      - changes results at trunction error level
224      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
225    o added pkg/frazil:
226      - see frazil_description.tex for details
227      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
228    o pkg/shelfice/shelfice_thermodynamics.F
229      - fix exponents for velocity dependent exchange coefficients: change
230        from 2/3(=0) to 0.66666666666666667
231      - move computation of velocity dependent exchange coefficients into
232        separate loop, so that it applies to both thermodynamics
233      - move some divisions by constants out of loops
234    
235    checkpoint63j (2012/02/16)
236    o pkg/seaice:
237      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
238      - SItracer:  added run time params, and allow coupling to ocn salinity.
239    o pkg/seaice: remove (almost) all divisions by constants within loops
240      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
241      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
242      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
243      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
244    o pkg/seaice :
245      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
246        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
247      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
248      - add permanent SItflux diag that corresponds to TFLUX but includes
249        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
250      - allow activation/testing of a fix for suspected missing term in
251        ocn-ice heat budget (to be confirmed). To test this, you want to
252        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
253        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
254      - no change in results, fwd or ad.
255    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
256      - switch to variable freezing point.
257           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
258      - bug fix : the sublimation term that was missing is now activated.
259           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
260      - bug fix : flooding sign term for SIsal0.NE.0.
261           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
262    o pkg/seaice:
263      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
264        is now the default, and the old default constant freezing point is recovered
265        with SEAICE_tempFrz0    = -1.96,
266             SEAICE_dTempFrz_dS = 0.,
267      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
268      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
269      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
270        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
271      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
272        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
273      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
274        seaice_growth r149 for legacy branch (no results change).
275      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
276        from I. Fenty).
277      - results did not change except for global_ocean.cs32x15, mostly due to the
278        switch to variable freezing point (see above item for detail).
279    o pkg/thsice:
280      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
281        seawater freezing in thsice_calc_thickn (not used).
282    o pkg/seaice: turbulent flux term specification via run time params.
283      - replace CPP switches with run time switches to facilitate testing
284      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
285                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
286      - added runtime parameter : SEAICEturbFluxFormula
287      - move Mcphee constants to SEAICE_PARAMS.h
288      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
289                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
290                 remove seaice_summary call (moved to seaice_init_fixed)
291      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
292        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
293      - seaice_summary.F : add missing report of read turbulent flux term set up
294                           and SITRACER.
295      - seaice_check.F : check range; inform and stop if retired CPPs are used
296                         (incl. SEAICE_AGE).
297      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
298             CPP switch, same computation as before for the different options.
299      - change results at the truncation level.
300    o pkg/seaice:
301      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
302        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
303        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
304      - update verification/*/input*/data.seaice:
305        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
306        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
307        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
308        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
309    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
310      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
311        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
312        difference in results only due to machine truncation.
313      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
314        MaykutPolySatVap; keep MIN_LWDOWN.
315      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
316      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
317        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
318    o pkg/salt_plume:
319      - isolate saltPlumeFlux array exch into a specific S/R called from
320        do_oceanic_phys.F
321      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
322    o verification:
323      - move untested set-up to MITgcm_contrib/verification_other.
324    o pkg/seaice:
325      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
326    o pkg/seaice:
327      - seaice_solve4temp.F (keeping results unchanged):
328        * add 2 future run-time params to select which saturation vapor pressure
329          formula is used and how post-iteration fluxes are set.
330          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
331        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
332          the linearized expression to stay consistent with tsurf finding.
333      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
334        can be < 0.
335    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
336      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
337        conductive heat flux F_c , and add it explicitly when updating tsurf as
338        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
339        so that now F_ia has a consistent meaning through the entire routine.
340        This causes differences at truncation level: update output of fwd exp.
341        global_ocean.cs32x15.seaice.
342    o pkg/seaice:
343      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
344        of arrays, sign/direction of fluxes; no effect on results.
345      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
346        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
347        note: this should have been done before changing celsius2K default.
348      - to keep results unchanged, add back old value of celsius2K in verification
349        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
350      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
351        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
352        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
353        freezing temp is consistent with value in seaice_growth.F ; this causes
354        differences at machine truncation level: update lab_sea AD output (3/4).
355    o pkg/seaice:
356      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
357        and climsst/sss even when using seaice (to prevent calculation that might
358        use SST on land); does not affect any verification exp.
359      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
360        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
361    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
362      over land (non-legacy code)
363    o vectorize salt_plume package:
364      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
365      - this code computes plumebk everywhere (also over land), thus requires
366        code to avoid divisions by zero and catch the case of kLev=Nr.
367      - efficiency of salt_plume_frac is still sub-optimal
368    o tools (genmake2):
369      - fix makefile NAME specification (option: -makefile NAME) by adding
370        "-f $MAKEFILE" in few places where it was missing including makedepend
371        command (contribution from Paul).
372    
373    checkpoint63i (2012/01/24)
374    o model/src:
375      - add factorized versions of some EOS code to find_rho.F,
376        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
377    o model/src:
378      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
379      - change default celsius2K from 273.16 to 273.15
380      - to keep results unchanged, add back old value of celsius2K in verification
381        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
382         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
383    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
384      to make TAF generate vectorizable code
385    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
386       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
387       have flags that do this more efficiently.
388    o pkg/diagnostics/diagstats_calc.F
389      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
390    o pkg/obcs (with exch2):
391      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
392        and remove code (in obcs_readparms.F) which was based on EXCH of indices
393        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
394    o pkg/exf and seaice exp:
395      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
396        so that switching off area & heff advection flags does not affect results.
397      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
398      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
399        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
400        results of verification experiments: 1D_ocean_ice_column(fwd),
401        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
402        and offline_exf_seaice (all 4).
403  o pkg/seaice:  o pkg/seaice:
404    - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;    - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
405      remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.      remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
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