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revision 1.1571 by mlosch, Fri Jan 6 09:40:35 2012 UTC revision 1.1667 by heimbach, Fri Jun 8 15:12:09 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 verification/1D_ocean_ice_column/
8      For verification purposes, the exact adjoint rather than an approx.
9      should be used (e.g., to comare against F.D. or TLM).
10      removed autodiff_inadmode*_ad.F routines in code_ad/
11      Update results/ accordingly.
12    o pkg/cal:
13      - change cal_getdate.F so that output date is function of input time only
14        (less ambiguous, not mixed up with input iteration number).
15      - fix calendarDumps for non-zero phase-lag (S/R CAL_TIME2DUMP).
16    o pkg/diagnostics:
17      - implement calendarDumps also for stats-diags
18      - implement calendarDumps also for snap-shot output (negative freq)
19      - for now, ignores calendarDumps if non-zero phase-lag.
20    
21    checkpoint63n (2012/06/04)
22    o model/src:
23      - recompute rSurfW & S to ensure consistent column thickness (needed for rStar)
24        between Sum_k(hFac*drF) and rSurf-rLow, for now only when using pkg/shelfice;
25      - use h0FacC, W & S to compute hFac_surfC, W & S in calc_surf_dr.F (more
26        similar to calc_r_star.F); update results of experiment internal_wave and
27        tutorial_global_oce_in_p (affected @ truncation level).
28    o pkg/shelfice:
29      - add parameterisation of advective-diffusive flux into the ice shelf
30        according to Holland and Jenkins (1999), eq.22-33, as suggested by Jan De Ryd
31      - simply eps3/3a computation
32    o eesupp:
33     - add new CPP option (DISCONNECTED_TILES) to disconnect tiles (no exchange
34       between tiles, just fill-in edges assuming locally periodic subdomain) and
35       add corresponding exchange subroutines (EXCH0);
36     - new CG-solver version (_EX0) for disconnected-tiles special case.
37    o model/src (CG-solvers):
38     - modify Single-Reduction version (CG2D_SR) in case cg2dMaxIters is reached
39       (similar final residual output and max-Iter number as with standard version);
40     - allows to store and use lowest-residual solution (standard & _SR versions);
41     - cleaning up (remove old, commented out code, LETS_MAKE_JAM ...).
42     - by default, also compile CG2D_SR version (define ALLOW_SRCG in CPP_OPTIONS.h)
43    o eesup/src:
44     - global_vec_sum.F cleaning: add a BARRIER ; update comments ; remove ndef
45       ALWAYS_USE_MPI (no longer needed after fixing usingMPI settings - March 2012)
46    o pkg/salt_plume added to lab_sea/input_ad.noseaicedyn
47    
48    checkpoint63m (2012/04/27)
49    o pkg/shelfice:
50     - account for partical cells in surface level below ice-shelf for hydrostatic
51       pressure calculion (set uniformFreeSurfLev to F); update isomip experiments.
52    o ad test experiments:
53     - update and rename to "ad_optfile.local" local AD-optfile specific to a
54       particular adjoint verification experiment (in verification/*/code_ad/)
55    o pkg/seaice & pkg/exf:
56     - Part two of ECCO-CLIVAR code merges.
57       Completes merge of seaice area relax. code.
58       Requires unified CPP option EXF_ALLOW_SEAICE_RELAX
59       to be set in EXF_OPTIONS.h since this pkg controls its I/O
60       (and avoids second CPP option in SEAICE_OPTIONS.h)
61     - change default value of costIceStart & costIceEnd to a valid date.
62     - add snowPrecip to HSNOW in seaice_growth
63    o pkg/ptracers:
64     - move ptracers summary and setup check into separated S/R ; add a check for
65       valid PTRACERS_Iter0 value (error+stop or just warning).
66    o pkg/cal (+ pkg/ecco):
67     - avoid calling a S/R with 2 times the same arg (FWD: unless both are only used
68       as input; and for AD, unless both are not differentiable (e.g., k index)).
69    o model/src:
70     - define internal flag "uniformFreeSurfLev" (=T when free-surface level-index
71       is everywhere k=1) to speed-up some calculations (by pass kSurf reference);
72       temporary set to usingZCoords value (to be changed to F when using shelfice).
73     - hydrostatic pressure: implement partial cell near the surface also for
74       Z-coordinates (for the case where uniformFreeSurfLev=F); replace test on
75       usingZCoords with test on uniformFreeSurfLev where needed (in NonHyd code).
76    o pkg/ctrl/ctrl_init.F:
77     - add a formal parameter to s/r ctrl_init_rec to print
78       xx_$(ctrl_valiable)_file for easier debugging
79     - move call of cal_* routines into the if-block where they are really
80       needed so that xx_$(ctrl_variable)_period can be 0 or -12 without having
81       to specify a startdate
82    o pkg/seaice:
83     - update comments in SEAICE_OPTIONS.h (+ similar update of lab_sea/code and
84       global_ocean.cs32x15/code versions).
85     - turn on seaice Multi-category (in data.seaice, SEAICE_multDim=7) for
86       verification experiment global_ocean.cs32x15.seaice and update results.
87    o pkg/exf:
88     - new S/R EXF_GETFIELD_START to return starting-time of a forcing field
89       (according to useExfYearlyFields).
90    o pkg/cal:
91     - move calendar setting & summary (previously in cal_readparams.F) into new
92       S/R CAL_INIT_FIXED to be called later in the initialisation process, once
93       length of the simulation is set (after SET_PARMS call); This is an attempt
94       to fix Pb when, e.g.: pkg/longstep, modifies the length of the run.
95     - For safety: keep a record of pkg/cal parameter settings status
96               to allow to STOP if one pkg/cal S/R is called too early.
97     - add a stop in all basic pkg/cal subroutines if called before setting is done.
98     - modify cal_getdate.F: stop when nothing was returned;
99       if called with myIter=-1, simply retrun modelBaseDate (1,2 = startDate_1,_2);
100       this allows to remove "cal.h" from seaice_read_parms.F & init_mnc_vars.F.
101    
102    checkpoint63l (2012/04/04)
103    o pkg/bbl:
104      - fix call to FIND_RHO_2D in bbl_calc_rho.F (case multi-tiles per proc);
105        update global_with_exf output.yearly.txt file.
106    o pkg/cal:
107      - start to clean-up cal_set.F ; fix for the case where baseTime is non-zero.
108      - remove 2 unsused and very short (1 line only) functions ;
109      - remove unsused subroutines from AD-Diff list.
110    o model/src:
111      - start to implement clean wait to stop in initialization S/R (config_check.F,
112         packages_check.F, ini_parms.F and pkg/obcs/obcs_check.F + pkg/mypackage)
113    o folowing PRINT_MESSAGE changes:
114      - remove reminder multiple print to the same file (STDOUT) when multi-threads.
115    o pkg/bbl:
116      - modification so it can work with z*
117      - replace deltaT with dTtracerLev(k) for asynchronous time stepping
118      - global_with_exf/input.yearly verification; changes output.yearly.txt
119    o eesupp/src:
120      - PRINT_MESSAGE: use OpenMP critical instruction (similar to PRINT_ERROR);
121        writing to unit 0 (if unit=errorMessageUnit) extended to the case myThid=1
122      - CHECK_THREADS: specific code if using OpenMP threading: improve checking of
123        # of threads across processors (e.g., different env OMP_NUM_THREADS setting)
124      - improve special preliminary call to EESET_PARMS (if eedata is read 2 times).
125      - when using MPI, always set usingMPI=T ; set default accordingly and stop
126        if not consistent.
127      - ALL_PROC_DIE: add a BARRIER after MPI_FINALIZE call ; skip this when thread
128        argument is zero (in case called within single-thread section).
129    o pkg/fizhi:
130        clean-up turbulence cold-start switch: decided in fizhi_init_vars.F, stored
131        in common bloc (fizhi_coms.h) and then passed as argument up to S/R TURBIO.
132    o pkg/exch2:
133      - add argument "updateCorners" to S/R exch2_get_uv_bounds (enable to
134        activate EXCH_IGNORE_CORNERS in vector EXCH S/R).
135      - switch 1rst EXCH call to IGNORE_CORNERS (instead of UPDATE_CORNERS)
136        but keep the 2nd with UPDATE_CORNERS: this prevents overwriting good data
137        with bad ones coming from a not-yet-updated halo.
138        This should fix the problem when sNx <> sNy and GCD(sNx,sNy) < 2*Olx.
139    o pkg/frazil:
140        move FrzForcT diag from frazil_diagnostics_state.F to frazil_calc_rhs.F
141        http://mitgcm.org/pipermail/mitgcm-devel/2012-March/005384.html
142    o model/src/config_check.F: add a check for OLx>sNx/OLy>sNy
143    o verification/lab_sea
144      * #undef SEAICE_EXCLUDE_FOR_EXACT_AD_TESTING
145      * #define ALLOW_SST_CONTROL & ALLOW_SST_CONTROL
146      * nTimeSteps 3 -> 4
147      * changed reference output accordingly
148    o pkg/ctrl:
149      * fix ctrl_get_gen for xx_sst, xx_sss
150    o pkg/fizhi:
151      - fix 2 calls to S/R GRD2MSC (argument igrd) in update_earth_exports.F
152        update results of exp. fizhi-cs-32x32x40 (fail with only 6 digits for cg2d)
153      - by default, use new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE);
154        fix few out-of-bounds indices in referencing vars (initialise igrd to 1);
155        clean-up fizhi_turb.F (remove unused & uninitialised qdiaglsm array).
156    o pkg/gmredi:
157      - add diagnostic of Redi (main diagnonal) vertical diffusive flux of Temp
158    o pkg/fizhi:
159      - fix few initialisation and multi-tile Pb: aqualev & gridalt now pass the
160        (old)aces open64 tuv test.
161    o pkg/icefront: fix bug and reorder loop in icefront_init_varia.F
162    o pkg/mom_vecinv:
163      - fix 1 loop range in mom_vecinv.F to be like all the other loops which
164        set/update gu,gv/Diss (fix Pb of uninitialised fVerUkp in admom_vecinv
165        with non-lin free-surf).
166    o model/src: move k-loop outside of i/j-loops when (re-)computing R_low
167      in ini/update_masks_etc.F in order to avoid -O3 optimization problems with
168      some compilers (gfortran 4.6.0 on MacOS)
169    o momentum:
170      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
171        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
172        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
173    
174    checkpoint63k (2012/03/17)
175    o model/src:
176       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
177         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
178       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
179         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
180    o model/src: solve_*diagonal.F
181       - replace division with multiplication by inverse (similar to original version)
182         update output of AD exp. global_ocean.90x40x15.
183       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
184         to enable the use of the vectorized & differentiable solve_tridiagonal.F
185       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
186         vertical advection (to get solve_tridiagonal tested in AD mode).
187    o pkg/seaice: ECCO-CLIVAR merge:
188      1. seaice AREA relaxation
189         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
190         * runtime flag: SEAICE_tauAreaObsRelax
191      2. modified global mean cost imbalance code: CPP option
192          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
193    o another iteration on solve_*diagonal.F
194       Make choices independent of AUTODIFF
195       Default will be the adjoinable vectorized version.
196       Alternative choices are:
197       * non-adjoinable original version with low memory footprint:
198         #define SOLVE_DIAGONAL_LOWMEMORY
199       * still adjoinable but does not vectorize (k as inner-most loop):
200         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
201    o testreport
202     - add option to use a home made wrapper around "make"
203     - remove MITGCM_IEEE env. variable (no longer active)
204    o pkg/shelfice
205     - improve computation of friction velocity for velocity dependent
206       exchange coefficients: include velocities into SHELFICEBoundaryLayer
207       block to average velocities vertically
208     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
209    o Modify diagonal solvers, now three versions (upon request):
210      #ifndef SOLVE_DIAGONAL_AUTODIFF
211        1. default version (dating back a while ago)
212      #else /* def SOLVE_DIAGONAL_AUTODIFF */
213      # ifdef SOLVE_DIAGONAL_KINNER
214        2. adjoinable version with k-innermost loop (G. Forget)
215      # else
216        3. adjoinable vectorized version of 2.
217      # endif
218      #endif /* SOLVE_DIAGONAL_AUTODIFF */
219      All flags are currently set within routines, but could/should be moved to CPP-options.
220      Array bounds for 1. are as before, for 2.,3. cover the entire domain
221      (could be changed for 1. too).
222    o verification/lab_sea (fwd):
223      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
224        use 7 categories (except hb87), new solve4temp params (except salt_plume),
225        constant salinity (=4) or variable salinity (salt_plume) done through
226        SItracer.
227    o pkg/seaice:
228      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
229      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
230         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
231        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
232        SEAICE_freeze got retired) but already better than previously with
233        SEAICE_freeze=123456.7 deg.C;
234      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
235        (safer multi-threaded setting); always set SEAICEuseEVP;
236      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
237        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
238        stop if multiple specifications for the same coeff; make sure default
239        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
240    o pkg/obcs:
241      - allow to switch to upwind 1rst order advection scheme for the advective
242        flux computation at the open-boundary; disabled for adjoint built.
243    o pkg/ptracers:
244      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
245      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
246      - add parameter to decide when to start a tracer; use internal flag to
247        know which tracer to step-forward; switch this internal flag at the top
248        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
249        for adjoint built.
250    o pkg/seaice:
251      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
252      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
253      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
254    o pkg/ecco:
255      - fix writing of output file DiagnosCost_ClimSalt/Theta
256        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
257    o pkg/seaice:
258      - add missing initialisation of COR_ICE array in dynsolver.F
259      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
260        compiled either way, and is tested in all exps (multidim was only tested
261        in lab_sea ad before).
262      - cosmetic change to prepare for future addition of ITD. no change to results.
263        no defaults change.
264      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
265      - by lack of adequate verification experiments, I further used custom versions
266        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
267        should be correct.
268      - avoid recomputations in ad.
269    o array initialisation in adjoint mode:
270      1) pkg/mom_common/mom_calc_ke.F:
271        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
272        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
273        part this initialisation is gone, resulting in Floating Point Exception
274        (caught by open64 compiler with debug option).
275      2) model/src/convective_weights.F
276        set output convectCount over the full array range (instead of doing
277        an update): this fix a similar issue when called within recomputation (adjoint)
278        which could by-pass the initialisation (normally done in the caller S/R).
279    o pkg/seaice:
280      - final version of turbulent flux params, as agreed at MIT ice meet:
281           SEAICE_mcPheePiston (default is ~ 0.000875)
282           SEAICE_mcPheeTaper (default is 0.)
283           SEAICE_frazilFrac (defualt is 1.)
284           SEAICE_mcPheeStepFunc (default is false)
285      - changes results at trunction error level
286      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
287    o added pkg/frazil:
288      - see frazil_description.tex for details
289      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
290    o pkg/shelfice/shelfice_thermodynamics.F
291      - fix exponents for velocity dependent exchange coefficients: change
292        from 2/3(=0) to 0.66666666666666667
293      - move computation of velocity dependent exchange coefficients into
294        separate loop, so that it applies to both thermodynamics
295      - move some divisions by constants out of loops
296    
297    checkpoint63j (2012/02/16)
298    o pkg/seaice:
299      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
300      - SItracer:  added run time params, and allow coupling to ocn salinity.
301    o pkg/seaice: remove (almost) all divisions by constants within loops
302      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
303      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
304      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
305      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
306    o pkg/seaice :
307      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
308        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
309      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
310      - add permanent SItflux diag that corresponds to TFLUX but includes
311        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
312      - allow activation/testing of a fix for suspected missing term in
313        ocn-ice heat budget (to be confirmed). To test this, you want to
314        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
315        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
316      - no change in results, fwd or ad.
317    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
318      - switch to variable freezing point.
319           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
320      - bug fix : the sublimation term that was missing is now activated.
321           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
322      - bug fix : flooding sign term for SIsal0.NE.0.
323           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
324    o pkg/seaice:
325      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
326        is now the default, and the old default constant freezing point is recovered
327        with SEAICE_tempFrz0    = -1.96,
328             SEAICE_dTempFrz_dS = 0.,
329      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
330      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
331      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
332        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
333      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
334        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
335      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
336        seaice_growth r149 for legacy branch (no results change).
337      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
338        from I. Fenty).
339      - results did not change except for global_ocean.cs32x15, mostly due to the
340        switch to variable freezing point (see above item for detail).
341    o pkg/thsice:
342      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
343        seawater freezing in thsice_calc_thickn (not used).
344    o pkg/seaice: turbulent flux term specification via run time params.
345      - replace CPP switches with run time switches to facilitate testing
346      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
347                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
348      - added runtime parameter : SEAICEturbFluxFormula
349      - move Mcphee constants to SEAICE_PARAMS.h
350      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
351                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
352                 remove seaice_summary call (moved to seaice_init_fixed)
353      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
354        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
355      - seaice_summary.F : add missing report of read turbulent flux term set up
356                           and SITRACER.
357      - seaice_check.F : check range; inform and stop if retired CPPs are used
358                         (incl. SEAICE_AGE).
359      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
360             CPP switch, same computation as before for the different options.
361      - change results at the truncation level.
362    o pkg/seaice:
363      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
364        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
365        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
366      - update verification/*/input*/data.seaice:
367        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
368        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
369        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
370        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
371    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
372      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
373        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
374        difference in results only due to machine truncation.
375      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
376        MaykutPolySatVap; keep MIN_LWDOWN.
377      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
378      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
379        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
380    o pkg/salt_plume:
381      - isolate saltPlumeFlux array exch into a specific S/R called from
382        do_oceanic_phys.F
383      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
384    o verification:
385      - move untested set-up to MITgcm_contrib/verification_other.
386    o pkg/seaice:
387      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
388    o pkg/seaice:
389      - seaice_solve4temp.F (keeping results unchanged):
390        * add 2 future run-time params to select which saturation vapor pressure
391          formula is used and how post-iteration fluxes are set.
392          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
393        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
394          the linearized expression to stay consistent with tsurf finding.
395      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
396        can be < 0.
397    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
398      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
399        conductive heat flux F_c , and add it explicitly when updating tsurf as
400        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
401        so that now F_ia has a consistent meaning through the entire routine.
402        This causes differences at truncation level: update output of fwd exp.
403        global_ocean.cs32x15.seaice.
404    o pkg/seaice:
405      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
406        of arrays, sign/direction of fluxes; no effect on results.
407      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
408        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
409        note: this should have been done before changing celsius2K default.
410      - to keep results unchanged, add back old value of celsius2K in verification
411        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
412      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
413        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
414        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
415        freezing temp is consistent with value in seaice_growth.F ; this causes
416        differences at machine truncation level: update lab_sea AD output (3/4).
417    o pkg/seaice:
418      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
419        and climsst/sss even when using seaice (to prevent calculation that might
420        use SST on land); does not affect any verification exp.
421      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
422        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
423    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
424      over land (non-legacy code)
425    o vectorize salt_plume package:
426      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
427      - this code computes plumebk everywhere (also over land), thus requires
428        code to avoid divisions by zero and catch the case of kLev=Nr.
429      - efficiency of salt_plume_frac is still sub-optimal
430    o tools (genmake2):
431      - fix makefile NAME specification (option: -makefile NAME) by adding
432        "-f $MAKEFILE" in few places where it was missing including makedepend
433        command (contribution from Paul).
434    
435    checkpoint63i (2012/01/24)
436    o model/src:
437      - add factorized versions of some EOS code to find_rho.F,
438        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
439    o model/src:
440      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
441      - change default celsius2K from 273.16 to 273.15
442      - to keep results unchanged, add back old value of celsius2K in verification
443        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
444         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
445    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
446      to make TAF generate vectorizable code
447    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
448       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
449       have flags that do this more efficiently.
450    o pkg/diagnostics/diagstats_calc.F
451      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
452    o pkg/obcs (with exch2):
453      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
454        and remove code (in obcs_readparms.F) which was based on EXCH of indices
455        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
456    o pkg/exf and seaice exp:
457      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
458        so that switching off area & heff advection flags does not affect results.
459      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
460      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
461        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
462        results of verification experiments: 1D_ocean_ice_column(fwd),
463        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
464        and offline_exf_seaice (all 4).
465    o pkg/seaice:
466      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
467        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
468      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
469        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
470        not multi-dim advection;
471      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
472        SHORTWAVE_HEATING #undef.
473  o optim: make Makefile more robust (?)  o optim: make Makefile more robust (?)
474  o pkg/shelfice: add missing initialisation of num_shifwflx  o pkg/obcs:
475      * fix treatment of obcs_read_pickup for TAF
476    o pkg/shelfice:
477      * add missing initialisation of num_shifwflx
478      * new adjoint verification exp. for isomip
479      * change Prandtl and Schmidt numbers from generic formulations
480        (in terms of model diffus. and visc.) to separate runtime
481        parameters, with Holland and Jenkins (1999) default values.
482  o pkg/exf (interpolation):  o pkg/exf (interpolation):
483    - extended input field (2 rows) near the N & S poles:    - extended input field (2 rows) near the N & S poles:
484      * fill in with the symetric value (when even Nb of data in longitude)      * fill in with the symetric value (when even Nb of data in longitude)
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