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revision 1.1424 by mlosch, Thu May 5 09:24:44 2011 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 pkg/ctrl:  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 (?)
474    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):
483      - extended input field (2 rows) near the N & S poles:
484        * fill in with the symetric value (when even Nb of data in longitude)
485        * add average value at the poles only for scalar quantities ; for vector
486          component interpolation, skip the averaging and keep duplicated values,
487          unless the 2 components have same location (uvInterp=T) in which case
488          interpolate the 2 components together using S/R EXF_INTERP_UV.
489      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
490        together: this allows to account properly for local orientation when
491        averaging at N & S pole.
492      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
493        exf-interpolation near N & S poles. Undef by default.
494      - add debug check/print on 1rst iter if debugLevel >=2.
495    o pkg/exf:
496      - change masking flags definition (no longer "parameter"), put them in
497        common block and set them in S/R EXF_INIT_FIXED.
498      - change recognized masking flag from s,u,v to c,w,s since the mask
499        to use (maskC,W,S) depends on position on model grid and has little to
500        do with scalar/vector difference; fix masking if using P-coordinates.
501      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
502        and update results of exp. global_with_exf (x2).
503      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
504    o pkg/obcs
505      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
506    o pkg/exf (interpolation):
507      - assume periodicity in X only if input field cover full longitude range.
508      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
509        and should vectorise).
510      - fix input lat of the 2 added row (in case we provide N.pole data).
511    
512    checkpoint63h (2011/12/30)
513    o pkg/seaice:
514      - change declaration of UVM from _RL to _RS in order to get B-grid
515        uIce,vIce monitor when _RS = real*4
516    o pkg/offline:
517      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
518      - compute vertical velocity if not read from file (switch on exactConserv
519        & staggerTimeStep);
520      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
521    o verification:
522      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
523        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
524        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
525      - update output of exp. global_ocean.cs32x15.viscA4 after changing
526        grid-file angles (used here for coriolis-3d);
527      - remove (or gzip) few files not needed to run fizhi-cs experiments.
528    o pkg/exf (vector interpolation):
529      - rotate vector component toward local grid-axis orientation using grid-angles
530        (stored in GRID.h) instead of locally computed rotation angle; keep old code
531        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
532    o pkg/seaice:
533      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
534        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
535    o pkg/PKG_OPTIONS.h files:
536      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
537        outside of the #ifdef ALLOW_THISPKG / #endif block.
538      - update verification/*/code/PKG_OPTIONS.h files.
539    o add a verification experiment (offline_exf_seaice/input.seaice) that test
540      the B-grid LSOR solver
541    o pkg/seaice: sort out emissivity and long wave radiation step 2:
542      - add emissivity for snow and ice as new run-time parameters
543        (unfortunately) that default to the corresponding exf values; this
544        changes results in most verification experiments so that for backward
545        compatibility these parameter have to be set explicitly to inconsistent
546        values (ugly);
547      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
548        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
549        until we agree how to handle this bug properly
550    o pkg/exf (interpolation):
551      - add a set of run-time param ({inputfield}_interpMethod), one for
552        each interpolated input field, to select the interpolation method
553        with a value of zero switching off the interpolation;
554      - print interpolation parameters to standard output;
555      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
556        (to use instead runoff_interpMethod=0 in data.exf).
557      - simplify default setting of interpolation parameters (for all fields,
558        set position to match model grid cell-center position, leading to trivial
559        interpolation in case of regular Lat-Lon grid) and fix for the case of
560        non-uniform delY.
561    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
562       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
563       this factor is absolutely required, because the lw exitance (= out-going
564       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
565       where the reflectivity rho = 1-emissivity for conservation reasons. Once
566       this is established, we can remove the CPP-Flag (if we want to).
567    o pkg/seaice:
568      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
569        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
570      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
571        what the name implies (and not emissivity*BoltzmannConstant), this means
572        the old default value of 5.5e-8 now means
573        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
574        S/R exf_readparms
575      - FV-discretization of the B-grid LSOR solver, turn on with
576        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
577        of the calling routine dynsolver, so that B and C-grid code look a
578        little more alike.
579      - fix index bugs in ostres.F (B-grid code)
580    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
581    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
582      default for SEAICE_emissivity, if useEXF; requires setting a wrong
583      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
584      backward compatiblity
585    o model/src: use sigmaR in calc_ivdc
586    
587    checkpoint63g (2011/12/16)
588    o pkg/seaice/seaice_growth.F:
589      fix heat conservation of the coupled ocean-seaice system.
590      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
591      solid vs liquid water treatment is resolved via QNET.
592    o pkg/seaice/seaice_growth.F:
593      add missing term for sublimation in saltFlux, which was breaking conservation.
594    o pkg/seaice/seaice_model.F:
595      Remove this patholigical case treatment in evolution branch,
596      where it is un-necessary and breaks conservation.
597      Update global_ocean.cs32x15/results accordingly for
598      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
599    o model/src:
600      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
601      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
602    o pkg/obcs:
603      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
604      tendency for temperature and salinity that is then applied to update
605      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
606      horizontal advection and diffusion contributions on the boundary (in
607      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
608      removing the mask in S/R timestep_tracer. The advantage of this approach is
609      that the updated tracer values include contributions from the surface
610      forcing and vertical diffusion.
611      This modification changes exp4.stevens because of vertical diffusion.
612    o model/src:
613      change non-curvilinear grid setting to also work with exch2 + blank tiles:
614      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
615        face dimensions.
616      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
617        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
618        and INI_SPHERICAL_POLAR_GRID.
619      change test-experiment global_ocean.90x40x15:
620      - split the domain in many more tiles (9x4 tiles of 10x10 each);
621      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
622      - update results of both test (std & dwnslp).
623    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
624       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
625    o model/src:
626      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
627        and fix initialisation when using sigma-coords.
628    o model/src:
629     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
630       to their current value at the beginning of forward_step.F": add a new run-time
631       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
632     - set doResetHFactors=T in the following test exp:
633        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
634        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
635        and tutorial_global_oce_in_p (nonLinFS in p)
636    o pkg/ecco
637      - added IES cost term
638    o verification/advect_xz
639      - scale down the depth by 1/100 (from 200 km to just 2.km)
640      - add secondary test using divergent flow, r-star and implicit vertical advection.
641      - add note (check_conserve_TS.txt) and matlab script to check global
642        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
643    o pkg/rbcs:
644      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
645    o pkg/obcs (Stevens BCs):
646      - fix various problems in the phase speed computations of the Stevens
647        boundary conditions:
648        - sign error for western and southern boundaries,
649        - time tendencies were underestimated by factor of dTracerLev and some just
650          zero (for multidim advection schemes) -> now estimate time tendencies
651          from difference between previous (n) time level and the one before (n-1);
652          this requires storing a field per tracer per boundary, also in the pickup
653          files.
654        - replace deltaTmom in cflMer/Zon computation with dTracerLev
655        - set default phase velocity to cflMer/Zon
656      - update verification experiment exp4.stevens
657    o pkg/generic_advdiff (implicit_r):
658      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
659        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
660      - fix implicit vertical diffusion or advection with NonLin FreeSurf
661        (was using current recip_hFacC instead of future recip_hFacC): set future
662        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
663        solver S/R ;
664      - fill diagnostics of vertical advective fluxes (computed from tendency)
665        when using implicit vert. advection;
666      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
667         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
668         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
669         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
670    o pkg/diagnostics:
671      - add diags for T & S tendency which goes through Adams-Bashforth.
672    
673    checkpoint63f (2011/11/30)
674    o pkg/obcs/obcs_calc_stevens.F:
675      - join some loops to reduce number of if-statements
676      - fix a bug in code for northern and southern boundaries.
677    o pkg/seaice/seaice_init_varia.F
678      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
679        caused zero ice-velocities for the B-grid code
680    o pkg/seaice/seaice_init_fixed.F
681      - fix a bug in the initialisation of the second metric terms
682        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
683      - this affects all seaice configurations with useCurviLinearGrid = .true.
684        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
685        = .true. (default)
686      - the only verification experiment affected is global_ocean.cs32x15:
687        icedyn, seaice, and seaice_dynmix (AD)
688    o pkg/thsice/thsice_diagnostics_state.F
689      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
690        not contain garbage that can lead to surprises in diagstats_calc.F
691    o model/src:
692      - move bi,bj loops inside INTEGR_CONTINUITY ;
693      - call INTEGR_CONTINUITY directly from forward_step.F
694        (previously called from momentum_correction_step.F)
695      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
696        forward_step.F and pkg/ecco/the_main_loop.F
697    o model/src/do_oceanic_phys.F:
698      - reset addMass to zero only if useICEFRONT ;
699      - separated k-loop for rhoInSitu calculation ;
700      - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
701        and at constant T,S (= WdRHOdP);
702      NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
703        of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
704        transport of locally-referenced potential density);
705        to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
706    o gluemnc:
707      - replace ncrcat with ncks when adding variables to *.glob.nc
708      - change the way variables without record dimensions are handled so that
709        files that have variables with and without record variables can be glued:
710        add a record dimension with a new unique name to be able to differentiate
711        between variable with and without a-prior record dimensions. Remove
712        this record dimension before adding the variable to the *.glob.nc file.
713        This procedure automatically works also for grid.*.nc files that do not
714        have any record dimension.
715    o verification/cpl_aim+ocn:
716      - generate new reference output on baudelaire (gfortran, mpich2) (previously
717        from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
718    o pkg/obcs/obcs_calc_stevens.F:
719      - add code for northern and southern boundaries.
720      - reorder some loops to save some operations and so that drFBar can be scalar
721    o model/src:
722      - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
723        truncation) and add diagnostics for Adams-Bashforth tendency increment.
724      - update test-exp. AD output:
725        1D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
726      and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
727        front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
728        global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
729        matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
730        tutorial_global_oce_in_p, tutorial_global_oce_latlon and
731        tutorial_plume_on_slope.
732    o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
733      that vectorises. This code uses 3 extra 2D fields, F90 array assignments
734      and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
735      does not even come with an F77 compiler anymore, this should not be
736      a limitation
737    
738    checkpoint63e (2011/11/06)
739    o pkg/seaice adjoint of LSR:
740      - substantially rework STORE dirs.
741      - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
742        this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
743        and only perform SOLV_MAX_FIXED adjoint iters.
744        If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
745        always goes to same record, meaning that the last forward field will be
746        the one used in the adjoint - an approximation.
747      - now produces non-zero LSR-related gradients, and acceptable gradients for
748        An's zonal (x-z) test case (to be checked in)
749      - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
750        (but these are screwed up by the thermodynamics in the first place);
751        reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
752        output_adm.txt also reflects changes to seaice_lsr
753      - global_ocean.cs32x15:
754        * the "default" input_ad.seaice has been re-defined to always exclude dynamics
755          (output_adm.seaice.txt was updated)
756        * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
757          (output_adm.seaice_dynmix.txt)
758    o test-exp. exp4+stevens:
759      - switch off pTracers and nonHydrostatic (restart problems with NH); update output
760    o pkg/seaice (lsr solver):
761      - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
762        update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
763      - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
764      - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
765        into initial guess for linearised solver; use weight ~ (1/err)^2,4.
766      - compute (with new S/R) and print initial (+ free-driff sol. if available)
767        and final residual of linearised system.
768    o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
769      (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
770    o pkg/obcs: Stevens BCs (still only for east and west)
771      - fix Stevens BCs by using intermediate velocities of previous
772        time step as "baroclinic" contribution rather velocity of one grid cell
773        inside the boundaries; more consistent but makes the entire treatment
774        more complicated, requires new pickup files and two new S/Rs:
775        obcs_copy_uv_n and obcs_save_uv_n
776        keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
777        (undefined by default)
778      - silently move computation of some grid factors into separate loops to
779        save some recomputations
780      - add a hack for non-linear free surface
781      - add a verification experiment to exp4 that tests this code
782    o make gluemnc/xplodemnc work with (moron) non-GNU shell tools
783    
784    checkpoint63d (2011/10/25)
785    o pkg/obcs + seaice-dynamics:
786      - new implementation calls OBCS_APPLY_UVICE (in seaice_dynsolver.F) before
787        solving for uIce,vIce and prevent SEAICE_LSR or SEAICE_EVP to modify OB
788        values (consistent with an implicit method).
789      - add option OBCS_UVICE_OLD (in OBCS_OPTIONS.h, defined by default) to
790        return to older implementation (same results as before); note that none of
791        the "experimental" OBCS_SEAICE options are implemented in the new version.
792      - switch test exp. seaice_obcs to use new version (update output).
793    o pkg/seaice:
794      - add few stop (B-grid & CS-exch, B-grid & obcs, AUTODIFF & SEAICE_maskRHS)
795      - add parenthesis in Water-Ice drag calculations (evp & lsr);
796      - in seaice_lsr.F, simplify and fix AA3 setting in case sNx or sNy=1;
797        and fix case SEAICE_waterDrag=0 (but unstable if no or little seaice)
798      - update output of test exp lab_sea that uses evp or lsr (fwd+ad)
799        and global_ocean.cs32x15 (icedyn & seaice fwd+ad).
800    o pkg/layers:
801      - Include potential density as new coordinate (Thanks to David Munday)
802    o pkg/dic:
803      - Remove subroutine CALC_PCO2_APPROX_CO3 from carbon_chem.F and add
804        carbonate computation/output to CALC_PCO2_APPROX
805    o pkg/generic_advdiff
806      - make TAF generate code that vectorizes:
807        gad_dst3fl_adv_*.F, gad_u3c4_impl_r.F
808    o model/src:
809      - improve vectorization also for adjoint code of
810        solve_tridiagonal and solve_pentadiagonal. As this requires up to
811        5 new 3D-fields, this code is only turned on for the combination of
812        ALLOW_AUTODIFF_TAMC and TARGET_NEC_SX. Also remove error message
813        for singular matrix check (only for TARGET_NEC_SX).
814      - remove hard-wiring of CPP-flag ALLOW_SOLVERS_KLOOPINSIDE to
815        ALLOW_AUTODIFF. This flag now needs to be set outside of
816        solve_tri/pentadiagonal.F
817    o pkg/exf:
818      - fix previous modif in exf_readparms.F (revision 1.66: treatment of
819        optional namelist EXF_NML_OBCS).
820      - add many debug-print (to trace down where pkg/cal error msg comes from)
821    o pkg/mom_vecinv/mom_vi_hdissip.F
822      - rearrange loops so that vectorization is improved and in particular
823        the adjoint routine vectorizes. The code is a little longer now, but I
824        think easier to read.
825        Note: CPP-flag MOM_VI_ORIGINAL_VISCA4 is not tested.
826    o pkg/seaice:
827      - allow to specify initial seaice velocity from files (uIceFile,vIceFile)
828    o pkg/exch2:
829      - alternative code (without tile x tile matrix) for cumulated (global) sum;
830        used as default; keep using matrix version in adjustment.cs-32x32x1.
831    o tools/build_options:
832      - after merging some MPI and/or multi-threads specific optfiles so that
833        the modified default optfile support both built (using genmake2 -mpi
834        for the MPI built, using genmake2 -omp for OpenMP built),
835        move now obsolete optfiles to tools/build_options/unsupported/
836       (add copy of email sent to support list in doc/optfiles_changes.txt)
837    
838    checkpoint63c (2011/09/28)
839    o pkg/ebm:
840      - fix ebm_zonalmean.F for several procs in Ydir (nPy > 1); update output of
841        test exp. global_ocean_ebm (affects machine truncation, 12 digits for cg2d)
842    o pkg/seaice (SItracer pickup)
843    * Simple code for pickup of SItracer fields (#define ALLOW_SITRACER)
844      To be done:
845      - thorough testing of missing fields in S/R seaice_read_pickup
846      - thorough matching between generic tracers and specific fields used
847        (e.g. volume-weighted age, area-weighted age, salinity, ...)
848    o pkg/grdchk:
849      - all procs calculate and print finite-difference gradient (for testreport)
850      - change description output used by testreport;
851      - AD testing: also compare and report Finite-difference gradient;
852        => update all output_adm*.txt
853    o test exp. global_ocean_ebm:
854      - switch back useRealFreshWaterFlux (no problem anymore with run-off);
855        and turn on exactConserve; update (fwd) output.
856    o pkg/seaice (LSR):
857      - print to STDOUT number of solver iterations at SEAICE_monFreq interval.
858      - modify solver to deal cleanly with u/v switch at face edges (CS-grid):
859        * identical results with non-CS topology (but save up to half of EXCH calls)
860        * no much changes in cs-32 verification tests since no ice at face edges
861         (differences due to convergence criteria, since nb of iterations changed)
862        * expect some differences on lat-lon-cap grid.
863        update FWD results of global_ocean.cs32x15 test exp. (icedyn & seaice)
864    o pkg/exch2:
865      - add new CPP option to disable Cumul-Sum matrix (to save storage when using
866        many tiles); until alternative coding is added, just add a stop.
867    o pkg/kpp:
868      - move ptracer/salt correction to KPP diffusivity from calc_3d_diffusivity.F
869        to S/R KPP_CALC_DIFF_PTR (+ add tracer-index to argument list).
870    o optfiles:
871      - merged few MPI specific (*+mpi*) and multi-threads specific (*+mth) optfiles
872        into corresponding standard one, which now support different build:
873        (when using "genmake2 -mpi" for MPI built, "genmake2 -omp" for OpenMP built)
874      - add "darwin_amd64_gfortran" optfile (initially from Constantinos, tested by Gael)
875    o pkg/obcs (seaice):
876      - add missing EXCH for uIce,vIce after applying OBCS;
877      - remove S/R EXF_SWAPFFIELDS_X/Y , disable S/R EXF_SET_OBCS_X/Y by adding
878        argument = number of levels to S/R EXF_SWAPFFIELDS_XZ/YZ and S/R
879        EXF_SET_OBCS_XZ/YZ ; update obcs_exf_load.F;
880      - fix EXF_SET_OBCS_XZ/YZ for multi-threaded (assuming loaded arrays are shared)
881      - verification exp. seaice_obcs: split domain in 2 tiles ; add SIZE.h_mpi
882        and eedata.mth for MPI and mutlti-threaded testing.
883    o pkg/flt:
884      - make FLT EXCH working with multi-threads (and MPI + multi-threads);
885      - use buffer for floats IO (trajectories & profiles); size set in FLT_SIZE.h;
886      - fix pickup and trajectories + profiles output with multi-threads;
887      - add parameter to select group of fields to write along trajectory and
888        profile (default unchanged);
889      - only call PORT_RAND* function when flt_noise <> 0;
890      - add multi-threaded test for verification exp. flt_example.
891    o eesupp/src:
892      - fix S/R ALL_PROC_DIE for MPI+multi-threads.
893      - USE_OMP_THREADING: check that number of threads (from eedata) matches
894        actual number (from env.var. setting).
895    o pkg/ebm:
896      - fix multi-threading in ebm_area_t.F ; clean-up EBM.h header file.
897      - add multi-threaded test for verification exp. global_ocean_ebm
898    
899    checkpoint63b (2011/08/29)
900    o pkg/ebm:
901      - fix sign of runoff;
902      - update directly forcing fields (Qnet,EmPmR) to use standard
903        external_forcing_surf.F (remove ebm_forcing_surf.F);
904      - avoid loading forcing fields a 2nd time (1rst time from ini_forcing.F);
905      - set either tauThetaClimRelax (in data) or tauThetaZonRelax (in data.ebm)
906        and apply relaxation towards corresponding SST field (2-D map or ZonAver).
907      - update global_ocean_ebm parameters file data and update output (fwd+ad).
908    o verification/matrix_example:
909      - split domain in 8 tiles (2x4); add SIZE.h_mpi and eedata.mth for
910        MPI and mutlti-threaded testing.
911    o pkg/matrix:
912      - change name of S/R MATRIX_INIT to S/R MATRIX_INIT_VARIA ;
913      - fix for multi-tiles (add bi,bj indices to exp/impMatrixCounter);
914      - fix for multi-threaded (remove DATA statement);
915      - use standard DIFFERENT_MULTIPLE function;
916      - add MATRIX_OPTIONS.h
917    o verification/matrix_example:
918       To allow to split the domain in several tiles, change the domain size
919        from 31x31 to 32x32 by adding 1 row (on Southern side) + 1 column (on
920        Western side) of land points.
921    o (*_)write_pickup:
922      - fix few bugs in mypackage_read/write_pickup.F
923      - in MDS_WR_METAFILES calls, replace "myTime" by a local copy into
924        array of length 1 (was caught by compiler syntax-check).
925    o pkg/diagnostics (velocity potential solver):
926      - fix initialisation of main diagonal matrix (for overlap values)
927    o tools/build_options:
928      - towards single optfile for MPI and non-MPI built: merge few +mpi optfile
929        into previously non MPI one (linux_am64 pgf77,open64,pathf90,ifort11)
930      - linux_amd64_gfortran: merge +mpi_generic version into standard optfile:
931        * move IEEE flags to DEVEL section; take IEEE flags from +mpi_generic ;
932        * FAST case: for now, keep -O3 with ini_masks_etc.F in NOOPTFILES list;
933        and use "-devel" testreport option for standard testing on baudelaire.
934    o pkg/grdchk:
935      - Assume that all gradient-check position are within the same tile
936        corresponding to global indices (iGloTile,jGloTile) and that
937        positions (i,j indices or nbeg) are local to this tile;
938      - set tile local-indices and proc. number according to tile global-indices;
939      - remove grdchkwhichproc from namelist (retired param);
940      - send adjoint gradient to all procs so that all procs print it to STDOUT;
941      - switch on MPI test for global_ocean.90x40x15 AD test experiment.
942    o adding package bbl (Bottom Boundary Layer)
943      description in MITgcm/pkg/bbl/bbl_description.tex
944      example/test experiment in MITgcm_contrib/bbl
945    o adjoint verifications
946      - changed 5 experiments to multi-tiles
947        * global_ocean.90x40x15
948        * obcs_ctrl
949        * offline_exf_seaice
950        * tutorial_dic_adjoffline
951        * tutorial_tracer_adjsens
952        changed reference output for those that crossed tile boundaries
953        (changed choices of gradient check positions)
954      - with same tiling, switch on MPI test for the last 4 (add SIZE.h_mpi)
955      - temporary bug fix in grdchk_loc.F for obcs
956    o genmake2 & testreport
957      - add target "obj" (just for OBJFILES files) to Makefile;
958      - add option to specify FEXTRAFLAGS on command line.
959    o pkg/mypackage:
960      - remove bi,bj arguments from argument list of S/R MYPACKAGE_CALC_RHS
961    
962    checkpoint63a (2011/08/02)
963    o pkg/diagnostics (velocity potential):
964      - fix velocity-potential calculation when using OBCS: balance net inflow
965        at each level (new S/R OBCS_DIAG_BALANCE).
966      - fix some of the problems with OBCS in stream-function calculation.
967    o pkg/exf/exf_readparms.F
968      - make treatment of optional namelists (EXF_NML_04, EXF_NML_SGRUNOFF,
969        EXF_NML_OBCS) more consistent, so that you need not have these lists
970        in data.exf when they are not used.
971    o optim/optim_readdata.F:
972      - add some output about obcs variables that might help debugging
973      - add a check about nvarlength
974    o pkg/ctrl: once again, fix computation of endrec in s/r ctrl_init_rec
975    o pkg/diagnostics (velocity potential):
976      - fix mask for OBCS (still problems in stream-function with OBCS);
977      - add specific parameter (default = main code CG2D params) for solver;
978      - in case of poor convergence, use solution corresponding to lowest residual.
979    o pkg/seaice/seaice_growth.F: small changes that permit vectorizable
980      adjoint code. In general statements like tmpscal=fld(i,j) are problematic
981      and should be avoided where possible.
982    o model/src (rStar):
983      - include r* effect on reference-state (PhiRef) in totPhiHyd
984        (so that it's really the potential anomaly at the cell center);
985        affect solution only if z* with full pressure in EOS.
986      - test-exp global_ocean.90x40x15: reduce viscA4 (was not stable) and
987        update output (because of z* in totPhiHyd and viscA4 changes);
988      - keep the previous diagnostics as "PHIHYDcR" (closer to potential anomaly
989        @ constant r) until interpolation at constant r is implemented.
990    o pkg/diagnostics
991      - fix RCENTER diagnostics in case cell center is not at interface middle
992    o add code for TEOS-10 (www.teos-10.org, McDougall et al. 2011). Use
993      this eos with eosType = 'TEOS10', in data (PARM01). This eos implies
994      that THETA and SALT are "conservative temperature" and "absolute
995      salinity"
996    o pkg/ctrl
997      - fix computation of endrec in s/r ctrl_init_rec
998      - ctrl_pack/unpack_*: remove unused variables and some obsolete code
999    o pkg/seaice/seaice_growth.F
1000      - fix recomputation with FENTY_AREA_EXPANSION_CONTRACTION code,
1001        remove then obsolete STORE directives
1002      - fix STORE directives for tice and tices, so that only the
1003        appropriate part of the fields are stored (and not the entire
1004        field); update global_ocean.cs32x15.seaice AD output.
1005      - cosmetic changes: adjust CPP flags and indentation for better
1006        legibilty
1007    o pkg/autodiff: add mnc-output of adBottomDragFld (code contributed by
1008      Chris Wilson)
1009    o pkg/gmredi:
1010       Add Sub-Meso Eddies parameterisation from Baylor (for now, disabled with TAF),
1011       and test it in verification exp. "front_relax.bvp" (update output.bvp.txt)
1012    
1013    checkpoint63  (2011/07/11)
1014    o pkg/exch2:
1015     - rename+move: nTiles in W2_EXCH2_PARAMS.h --> exch2_nTiles in W2_EXCH2_TOPOLOGY.h
1016     - exch2 version of Cumul-Sum routine: S/R W2_SET_MAP_CUMSUM set up the
1017       (2*nTiles)x(nTiles) Cumul-Sum matrix and Master Proc collects all tiles X,Y
1018       increments, calculates Cumul-Sum @ tile origin and sends results to each tile.
1019    o pkg/diagnostics:
1020     - deal with pairs of post-processed diags which are computed together; in
1021       particular, re-order list of diags within 1 file to save 2nd computation.
1022     - add S/R to compute velocity stream-function (called after velocity-potential
1023       calculation) from divergence free transport -> new diagnostics "PsiVEL".
1024     - add parameter to select grid-point location where PsiVEL == 0.
1025    o eesupp/src:
1026       new S/R to calculate cumulated sum on tiled array, corner grid-cell location
1027       (specific S/R needed with exch2 topology - for now, just print an error msg)
1028    o pkg/shelfice
1029     - Implement friction velocity-dependent transfer coefficients following
1030       Holland and Jenkins, JPO, 1999
1031       Original code by M. Losch with small modifs.
1032       Enable with CPP option SHI_ALLOW_GAMMAFRICT
1033       and runtime flag SHELFICEuseGammaFrict
1034    o verification lab_sea & global_ocean.cs32x15:
1035     - use tools/xmakedepend (instead of cyrus_makedepend, in genmake_local):
1036       does not miss some dependencies (but is slower) and also works with many files
1037       (default makedepend limitation for AD built).
1038     - use cyrus_makedepend in adjustment.128x64x1 (so that it still tested).
1039    o pkg/diagnostics:
1040     - add run-time parameter "useMissingValue" (def=False) to fill land-point
1041        (i.e., where mask=0) with MissingValue ; used only in MNC output file.
1042       This replaces CPP-option DIAGNOSTICS_MISSING_VALUE.
1043     - Extend the use of "missing_value" setting from data.diagnostics for the case
1044       of counter-diagnostics (where fraction-weight is zero). This applies both to
1045       MNC and MDS output files.
1046    o pkg/seaice/seaice_growth.F:
1047      - add 'a priori' cap of latent heat flux based on actual mass considerations
1048        when SEAICE_ADD_SUBLIMATION_TO_FWBUDGET is used in conjunction with the
1049        non-legacy seaice_solve4temp.
1050      - add diagnostic of the residual sublimation freshwater flux (the freshwater
1051        flux taken from the ocean if the total actual latent heat fluxes exceed
1052        the maximum)
1053      - remove the CPP switch around the *_FWbySublim unit change and move diagnostic
1054       fill for SIatmQnt, SIfwSubl, SIatmFW to the end of seaice_growth.F.
1055      - add diagnostic of the actual sublimation freshwater flux (that is 0. ifndef
1056       SEAICE_ADD_SUBLIMATION_TO_FWBUDGET) and of the latent heat flux (evap+sublim).
1057      - bug fix : frWtrAtm needs a_FWbySublim ifdef SEAICE_ADD_SUBLIMATION_TO_FWBUDGET.
1058      - bug fix : missing part to Martin's r_FWbySublim pathological case fix.
1059    o verification 1D_ocean_ice_column:
1060       made model domain truly 1x1x23 instead of 5x5x23 with only center cell (3,3,:) wet
1061       update results
1062    o pkg/diagnostics:
1063     - Implement setting of "Post-Processed" diagnostics (corresponding to gdiag(5)='P')
1064       which are not filled-up but computed from other diags ; In this case, the mate
1065       diag points to the primary (filled-up) diag to used for post processing.
1066     - Update Velocity-potential computation using post-processed diag framework.
1067     ==> Change the ordering of fields and time-periods in MDS output file
1068       when using periodic averaging: now writes one time record with the full set
1069       of fields for this time period, then the next time reccord (it used to be
1070       one field with the full set of time records then the next field).
1071         Note: this is now similar to NetCDF (MNC) output file. <==
1072    
1073    checkpoint62z (2011/06/21)
1074    o adjoint monitor:
1075     - Add adjoint monitor output for packages exf, seaice
1076       and update relevant testreport output
1077    o pkg/seaice:
1078     - re-order diags inits so that they appear in order in available_diagnostics.log
1079     - added diags: hsnow thermo. rates of change, area preceeding ridiging process,
1080       area/heff/hsnow preceeding thermodynamic growth/melt.
1081     - modified diag: SIdA; output actual effect, as the description states.
1082     - modified description: SIqneti, SIqneto, SIuheff, SIvheff, SIdAb*, HSNOW.
1083     - retired redundant diags: SIyneg, SIfice, SIsnwice, SIthdgrh.
1084       (SIyneg->SIdHbOCN; SIfice->SIdHbATC; SIsnwice->SIdHbFLO;
1085        and SIthdgrh->SIdHbOCN+SIdHbATC+SIdHbATO)
1086     - modified diags (2) : switch all SIdA*, SIdH*, SIdS* from delta to rates.
1087     - added diagnostics for seaice generic tracers (SItr*).
1088     - added SItrUnit and SItrNameLong run time param (for SItr* diags).
1089     - in diag names, replaced 'PrTh' abbrev. of 'preceeding thermo' with 'PT'.
1090     I. Fenty: 18-Jun-2011:
1091     Minor changes to seaice package:
1092     1) Retired old variables (A22, SEAICE_lhsublim, areaMax, areaMin, hiceMin) and
1093        added some new ones (SEAICE_area_reg, SEAICE_hice_reg, SEAICE_area_floor)
1094       - Differentiated "regularization variables" from "floor variables"
1095        * areaMin became SEAICE_area_reg (old A22) and SEAICE_area_floor
1096        * hiceMin became SEAICE_hice_reg (old hiceMin)
1097          (with _reg meaning regularization variable)
1098       - SEAICE_lhSublim becomes lhSublim, the sum of SEAICE_lhEvap and SEAICE_lhFusion
1099        so as to ensure energy conservation when going between phases
1100      - A22 was not used anywhere
1101     2) Changed regularization procedure for heffActual and hsnowActual to ensure
1102        well-boundedness and smooth adjoint in seaice_growth.F
1103     3) Fixed a bug where seaice_solve4temp would not recognize ice-free grid cells
1104        because the old regularization always set heffActual >= 0.05 cm
1105     4) Changed the model so that the default behavior is to put a small (10^-5) "floor"
1106        on AREA when HEFF > 0.
1107      - went from requiring ALLOW_PRECLUDE_INFINITESIMAL_AREA to be defined to
1108        requiring that DISABLE_AREA_FLOOR *not* be defined
1109     Affected verifications:
1110      - 1D_ocean_ice_column (output.txt output_adm.txt)
1111      - global_ocean.cs32x15 (output.seaice.txt output_adm.seaice.txt)
1112    o pkg/diagnostics:
1113      - move MNC code from diagnostics_out.F into new diagnostics_mnc_out.F (2 S/R).
1114      - rename S/R GETDIAG to DIAGNOSTICS_GET_DIAG and change type of 1rst argument
1115        (was _RL, now integer) with option = 0 to retrieve all levels.
1116      - add pieces of code to compute velocity potential at each level (new diagnostics
1117        PhiVEL, works only when UVELMASS & VVELMASS are also turned on);
1118        for now, using same params as CG2D (target-resisual, max Nb of iter ...).
1119      - fix few issues with counter diagnostics in diagnostics_setdiag.F &
1120        diagstats_setdiag.F (if diagnostic counter is itself a counter diag)
1121        and in diagnostics_fract_fill.F (do not need a valid pointer for the
1122        diagnostics counter-mate); check that definition of counter-diagnostic
1123        includes a valid counter-mate (in diagnostics_set_levels.F).
1124    o model/src (rStar):
1125      - add rStar scaling factor in diags_phi_hyd.F (similar to calc_grad_phi_hyd.F);
1126        affect solution only if z* with full pressure in EOS;
1127        update output of test-exp global_ocean.90x40x15.
1128    o pkg/seaice:
1129      - introduce siEps=1e-5 parameter
1130      - use areaMax in AREA update (part 4), consistent with ridging step (part 2.5).
1131      - re-organize SEAICE_ADD_SUBLIMATION_TO_FWBUDGET code.
1132      - introduce ALLOW_SITRACER and seaice_tracer_phys.F to handle generic seaice tracer.
1133        For now it covers, and was tested for, ice salinity and age (attached to HEFF),
1134        as well as ice cover age and ridging index (attached to AREA).
1135        For now the run time parameters (in data.seaice/SEAICE_PARM03) are
1136        SItrName (e.g. 'age') and SItrMate ('HEFF', which is the default, or 'AREA').
1137        Up to SItrMaxNum=3 tracers can be used simultaneously.
1138    o pkg/salt_plume:
1139      -introduce SPsalFRAC run time parameter that sets the fraction of the
1140       salt by-product of ice growth (SPsalFRAC*(1-SIsalFRAC)*salt typically)
1141       that gets vertically redistributed (fluxed down) by pkg/salt_plume.
1142    o model debug options:
1143      - Switch reading of debugMode from S/R INI_PARMS (parameter file "data", stored
1144        in PARAMS.h) to S/R EESET_PARMS (parameter file "eedata", stored in EEPARAMS.h).
1145      - Refine debug-msg printing selection (3 new levels):
1146        debugMode  : controls printing of debug messages (sequence of S/R calls).
1147        debugLevel : controls printing of algorithm-relevant auxiliary/debug messages
1148         debLevZero =  0 ; /* level of disabled aux. msg printing */
1149         debLevA =  1 ; /* level of minimum  aux. msg printing */
1150         debLevB =  2 ; /* level of low aux. print (report read-file opening)*/
1151         debLevC =  3 ; /* level of moderate debug prt (most pkgs debug msg) */
1152         debLevD =  4 ; /* level of enhanced debug prt (add DEBUG_STATS prt) */
1153         debLevE =  5 ; /* level of extensive debug printing */
1154        New debugLevel default: with default debugMode value (=F),
1155          = 2 (debLevB) or = 1 (debLevA) in case ALLOW_AUTODIFF is defined.;
1156          and if debugMode=T, default debugLevel = 4 (debLevD).
1157        Relation with previous settings:
1158         debLevB (=2) corresponds to former debLevA (=1)
1159         debLevD (=4) corresponds to former debLevB (=2)
1160        Note:
1161         a) if debugLevel=0, skip WRITE_GRID call when nIter0 > 0 (same as before);
1162         b) default debugLevel=1 is convenient in AD runs (avoid many file opening msgs);
1163            to recover previous default, set debugLevel=2 (e.g. AD-test hs94.1x64x5)
1164      - Add new parameter (printResidualFreq, read from PARM02 namelist) to print
1165        detailed CG solvers convergence; off (=0) by default, except if debugLevel=5.
1166    o pkg/obcs:
1167      - change OBCSfixTopo default from True to False (should not change the results);
1168        keep OBCSfixTopo=T in verification-exp. seaice_obcs.
1169    o pkg/thsice:
1170      - fix bug in thsice_calc_thickn.F (was introduced in version 1.18) in
1171        2nd layer seaice sublimation (unlikely to happen)
1172      - use Interior mask for OBCS in thsice_advection.F (similar to what is
1173        done in gad_advection & seaice_advection).
1174    o adjoint:
1175      bug fix spotted by Gael Forget:
1176      seaice_advection and thsice_advection still had
1177      legacy CPP options to avoid CS corner updates for adjoint
1178    o pkg/seaice:
1179      => Change some of the defaults (2011/05/29):
1180         - change SEAICEuseFluxForm default (from False to True)
1181         - change DIFF1 default (from 0.004 m/s to 0. m/s)
1182         And print warnings if DIFF1 is not set in data.seaice and centered
1183          avection scheme is used without any diffusion.
1184      also:
1185      - fix seaice_diffusion calls in default AdvScheme part of seaice_advdiff.F;
1186      - set SEAICEdiffKh[] default in the same way as SEAICEadvSch[]
1187      - stop if DIFF1<>0 with SEAICEadvScheme <> 2, if DIFF1<>0 with any
1188        other non-zero SEAICEdiffKh[] diffusivity, if SEAICEadvSalt=T with
1189        #undef SEAICE_VARIABLE_SALINITY, if SEAICEadvAge=T with #undef SEAICE_AGE.
1190      update results of test exp.:
1191         lab_sea: output.fd (switch to AdvScheme=33 with diffKh=20)
1192             output.hb87, output_adm.evp (SEAICEuseFluxForm=T and diffKh=200)
1193             output_adm.noseaicedyn (SEAICEuseFluxForm=T)
1194         offline_exf_seaice: output.seaicetd, output_adm (SEAICEuseFluxForm=T)
1195         seaice_obcs: output (SEAICEuseFluxForm=T)
1196      and prescribe old default for SEAICEuseFluxForm (=F) and DIFF1 (=0.004)
1197          for standard fwd & AD lab_sea tests (to keep the same output).
1198    o pkg/seaice/seaice_growth.F:
1199      - use Ian Fenty's capping formulas for actual ice
1200      thickness thoughout EVOLUTION branch.
1201      - put treatment pathological case #2) in CPP brackets
1202      (ALLOW_AVOID_INFINITESIMAL_AREA, undef by default).
1203      - update global_ocean.cs32x15 and 1D_ocean_ice_colum results accordingly.
1204    o pkg/seaice:
1205      - seaice_diffusion.F : remove the min(DX,DY) factor permanently;
1206      pass the Laplacian diffusivity (in m^2/s) diffKh as a parameter;
1207      also pass fac as a param, which can be 1. (to update the tendency
1208      field) or the time step (to update the field itself).
1209      - seaice_advdiff.F: for multidim, call seaice_diffusion with
1210      e.g. SEAICEdiffKhHeff and with fac=1; for single-dim, call
1211      seaice_diffusion with e.g. SEAICEdiffKhHeff and with fac=time step.
1212      - SEAICE_PARAMS.h, seaice_readparms.F, seaice_check.F :
1213      hooks to handle SEAICEdiffKhHeff, SEAICEdiffKhArea, etc.
1214    o pkg/seaice:
1215      diffusion with centered advection scheme (diffus.F & advect.F):
1216      - simplify S/R DIFFUS (put deltaT & DIFF1 factor outside, move EXCH outside)
1217        to just compute the laplacian of input-field.
1218      - unroll k loop (harmonic,biharmonic diff) in advect.F to save 1 exch call.
1219      - fix flux-form version in diffus.F to conserve tracer.
1220      update output of lab_sea.fd & lab_sea.hb87 (1rst set of modif affects
1221       machine truncation) and lab_sea.salt_plume (conservative flux-form modif)
1222    
1223    checkpoint62y (2011/05/26)
1224    o pkg/seaice:
1225     - seaice_growth.F : in EVOLUTION branch, always include
1226       a_QSWbyATM_cover in qnet (as it should be).
1227     - verification/global_ocean.cs32x15 : update results accordingly
1228       (output.seaice.txt output_adm.seaice.txt).
1229    o pkg/seaice + obcs:
1230     - use maskInW & maskInS in multi-dim advection and biharmonic diffusion:
1231       equivalent of assuming no tracer gradient outside the OB region.
1232       update output of seaice_obcs (uses DIFF1 <>0 => biharmonic diffusion)
1233     - remove calls to OBCS_COPY_TRACER after EXCH calls (no longer needed
1234       after changes above);
1235     - obcs+seaice cleaning: apply seaice-tracer OB values to tracer field
1236       only at OB location (instead of over a band of OLx width).
1237    o pkg/seaice:
1238     - fix wrong indices in old (non Flux-Form) diffusion default S/R diffus.F
1239       (dxG(I+1, ...) changed to dxG(I, ...), no impact on Lat-Lon grid)
1240    o pkg/obcs:
1241      - split header file "OBCS.h" into 4 separated files:
1242        OBCS_PARAMS.h, OBCS_GRID.h, OBCS_FIELDS.h & OBCS_SEAICE.h
1243       Note: OBCS_PARAMS.h & OBCS_GRID.h can be included without OBCS_OPTIONS.h
1244         (contain no conditional statement which depends on OBCS options).
1245      - move "useOBCSYearlyFields" from "data.obcs" (hold in OBCS_PARAMS.h)
1246        to parameter file "data.exf", namelist EXF_NML_OBCS (in EXF_PARAM.h).
1247    o ctrl, cost, grdchk & autodiff pkgs:
1248      - make options file more standard (like other {PKG}_OPTIONS.h file but
1249        with AD_CONFIG.h); clean-up some of the included header files.
1250    o pkg/obcs:
1251      - do not mask tracer when applying OB (tracer == 0 could generate problems)
1252      - apply tracer OB values to tracer field only at OB location (instead of
1253        over a band of OLx width)
1254      - clean-up obcs_apply_w.F & obcs_apply_eta.F (since less calls to these S/R)
1255      - remove OBCS_MULTIDIM_OLD_VERSION code in gad_advection.F and remove
1256        obcs_apply_tloc.F & obcs_apply_sloc.F
1257    o obcs in model/src:
1258      - call OBCS_APPLY_W only if NonHydrostatic.
1259      - call OBCS_APPLY_ETA only if NonLinFreeSurf.
1260      - reset dEtaHdt and wVel to zero outside OB interior region ;
1261      - leave tracer unchanged outside OB interior region: This has no effect
1262        on the solution but just to prevent unrealistic tracer value outside OB.
1263      - zero out velocity outside OB interior region: This has no effect on
1264        the solution but just to prevent unrealistic velocity outside OB.
1265    o obcs and non-lin free-surf:
1266       move call to OBCS_APPLY_R_STAR from update_r_star.F to calc_r_star.F
1267       and call to OBCS_APPLY_SURF_DR from update_surf_dr.F to calc_surf_dr.F
1268       + add argument "etaFld" to OBCS_APPLY_R_STAR & OBCS_APPLY_SURF_DR:
1269       this fixes missing EXCH + get consistent eta OB value (+ fix restart).
1270       update results of test-exp. exp4(nlfs).
1271    o exp4 (nlfs) test-exp:
1272       use OBC for Eta at Western & Eastern OB (to test prescribing Eta
1273       with NonLin-FreeSurf); update output.nlfs.txt
1274    o obcs and 2d/3d solver norm:
1275       use interior masks (maskInC) to cancel out cg2d & cg3d matrix coeff at OB
1276       and outside OB interior region (will allow to place OB further inside the
1277       domain). Depending on the domain, can affects cg2d-Norm (previous
1278       cancellation outside OB was only partial), e.g. in exp4 & obcs_ctrl,
1279       and cg3d-Norm (previous Norm was computed before canceling OB terms),
1280       e.g. in tutorial_plume_on_slope.
1281      - update output of exp.: exp4 (x2), obcs_ctrl and tutorial_plume_on_slope.
1282    o pkg rbcs:
1283      - split RBCS.h into 3 files: RBCS_SIZE.h, RBCS_PARAMS.h & RBCS_FIELDS.h
1284      - add capability to apply relaxation to horizontal velocity uVel & vVel.
1285    o pkg/grdchk: add gradient check for control variable xx_shifwflx
1286    o pkg/shelfice/shelfice_init_fixed.F
1287      fix CPP-flag combinations
1288    o pkg/seaice: Merge iceage code of Pierre Rampal
1289      * update/change/correct ice age calculations
1290      * add age updates for pathological cases
1291      Probably needs more testing...
1292    
1293    checkpoint62x (2011/05/13)
1294    o pkg/mom_vecinv:
1295       high-order vorticity scheme: use interior masks (maskInW & S)
1296       to zero-out (outside OB) gradient of vorticity.
1297    o verification exp.:
1298       turn on "useEnergyConservingCoriolis" (better discretisation) in exp.
1299       hs94.128x64x5 and seaice_obcs ; update results.
1300    o pkg/obcs:
1301      fix bug in OBeta for YZ sections in obcs_exf_load.F
1302    o pkg/ctrl, pkg/shelfice, and optim:
1303      - add new control variable xx_shifwflx (fresh water flux underneath ice
1304        shelves). This is almost as tedious as obcs-ctrl, because the
1305        variables needs its own mask.
1306      - add a cost function term that penalizes the deviation of xx_shifwflx
1307        from the first guess (zero) in analogy to other control variables
1308    o pkg/shelfice:
1309      - start basic adjoint
1310    o pkg/ctrl:
1311      - remove extra 2D field "for good measure" when initializing in
1312        ctrl_set_globfld_[xy/xz/yz].F
1313    - 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
1314    - improve error messages in ctrl_set_unpack_*    - improve error messages in ctrl_set_unpack_*
1315  o OBC implementation in momentum:  o OBC implementation in momentum:

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