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revision 1.1407 by jmc, Thu Apr 14 22:23:58 2011 UTC revision 1.1674 by jmc, Mon Jun 25 16:13:38 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 tools/genmake2:
8      - add "-DHAVE_NETCDF" to the DEFINES list when NetCDF is available ;
9        refine usePROFILES switching off (only when NetCDF is not available).
10    o verification (atmospheric set-up):
11      - change eosType='IDEALGAS' to eosType='IDEALG' to match variable declaration
12    o pkg/profiles : refine profiles and files handling.
13    o model/src and pkg/ecco : introduce run-time switch usePROFILES.
14    o model/src/the_main_loop.F, forward_step.F and pkg/exf/EXF_OPTIONS.h :
15      - changes to use model/src/the_main_loop.F rather than the ecco version
16        in ecco type adjoint runs.
17    o model/src:
18      - move computation of recip of grid distance & area from INI_MASKS_ETC to INI_GRID
19      - move setting of h0Fac[C,W,S] from INI_LINEAR_PHISURF to INI_MASKS_ETC
20      - update_masks_etc.F: rename SMOOTH*_R4,R8 function to the corresponding type (RS,RL)
21    o model/src:
22      - fix S/R UPDATE_CG2D for ALLOW_DEPTH_CONTROL case (was empty before);
23        update output of test experiment bottom_ctrl_5x5.
24    o pkg/generic_advdiff:
25      - implement vertical bi-harmonic diffusion (for now, only for T & S and
26        only explicitly).
27    o verification/bottom_ctrl_5x5/
28      update reference output (results changed quite some time ago,
29      not sure when; but new reference results look ok in terms of grdchk)
30    o verification/1D_ocean_ice_column/
31      For verification purposes, the exact adjoint rather than an approx.
32      should be used (e.g., to comare against F.D. or TLM).
33      removed autodiff_inadmode*_ad.F routines in code_ad/
34      Update results/ accordingly.
35    o pkg/cal:
36      - change cal_getdate.F so that output date is function of input time only
37        (less ambiguous, not mixed up with input iteration number).
38      - fix calendarDumps for non-zero phase-lag (S/R CAL_TIME2DUMP).
39    o pkg/diagnostics:
40      - implement calendarDumps also for stats-diags
41      - implement calendarDumps also for snap-shot output (negative freq)
42      - for now, ignores calendarDumps if non-zero phase-lag.
43    
44    checkpoint63n (2012/06/04)
45    o model/src:
46      - recompute rSurfW & S to ensure consistent column thickness (needed for rStar)
47        between Sum_k(hFac*drF) and rSurf-rLow, for now only when using pkg/shelfice;
48      - use h0FacC, W & S to compute hFac_surfC, W & S in calc_surf_dr.F (more
49        similar to calc_r_star.F); update results of experiment internal_wave and
50        tutorial_global_oce_in_p (affected @ truncation level).
51    o pkg/shelfice:
52      - add parameterisation of advective-diffusive flux into the ice shelf
53        according to Holland and Jenkins (1999), eq.22-33, as suggested by Jan De Ryd
54      - simply eps3/3a computation
55    o eesupp:
56     - add new CPP option (DISCONNECTED_TILES) to disconnect tiles (no exchange
57       between tiles, just fill-in edges assuming locally periodic subdomain) and
58       add corresponding exchange subroutines (EXCH0);
59     - new CG-solver version (_EX0) for disconnected-tiles special case.
60    o model/src (CG-solvers):
61     - modify Single-Reduction version (CG2D_SR) in case cg2dMaxIters is reached
62       (similar final residual output and max-Iter number as with standard version);
63     - allows to store and use lowest-residual solution (standard & _SR versions);
64     - cleaning up (remove old, commented out code, LETS_MAKE_JAM ...).
65     - by default, also compile CG2D_SR version (define ALLOW_SRCG in CPP_OPTIONS.h)
66    o eesup/src:
67     - global_vec_sum.F cleaning: add a BARRIER ; update comments ; remove ndef
68       ALWAYS_USE_MPI (no longer needed after fixing usingMPI settings - March 2012)
69    o pkg/salt_plume added to lab_sea/input_ad.noseaicedyn
70    
71    checkpoint63m (2012/04/27)
72    o pkg/shelfice:
73     - account for partical cells in surface level below ice-shelf for hydrostatic
74       pressure calculion (set uniformFreeSurfLev to F); update isomip experiments.
75    o ad test experiments:
76     - update and rename to "ad_optfile.local" local AD-optfile specific to a
77       particular adjoint verification experiment (in verification/*/code_ad/)
78    o pkg/seaice & pkg/exf:
79     - Part two of ECCO-CLIVAR code merges.
80       Completes merge of seaice area relax. code.
81       Requires unified CPP option EXF_ALLOW_SEAICE_RELAX
82       to be set in EXF_OPTIONS.h since this pkg controls its I/O
83       (and avoids second CPP option in SEAICE_OPTIONS.h)
84     - change default value of costIceStart & costIceEnd to a valid date.
85     - add snowPrecip to HSNOW in seaice_growth
86    o pkg/ptracers:
87     - move ptracers summary and setup check into separated S/R ; add a check for
88       valid PTRACERS_Iter0 value (error+stop or just warning).
89    o pkg/cal (+ pkg/ecco):
90     - avoid calling a S/R with 2 times the same arg (FWD: unless both are only used
91       as input; and for AD, unless both are not differentiable (e.g., k index)).
92    o model/src:
93     - define internal flag "uniformFreeSurfLev" (=T when free-surface level-index
94       is everywhere k=1) to speed-up some calculations (by pass kSurf reference);
95       temporary set to usingZCoords value (to be changed to F when using shelfice).
96     - hydrostatic pressure: implement partial cell near the surface also for
97       Z-coordinates (for the case where uniformFreeSurfLev=F); replace test on
98       usingZCoords with test on uniformFreeSurfLev where needed (in NonHyd code).
99    o pkg/ctrl/ctrl_init.F:
100     - add a formal parameter to s/r ctrl_init_rec to print
101       xx_$(ctrl_valiable)_file for easier debugging
102     - move call of cal_* routines into the if-block where they are really
103       needed so that xx_$(ctrl_variable)_period can be 0 or -12 without having
104       to specify a startdate
105    o pkg/seaice:
106     - update comments in SEAICE_OPTIONS.h (+ similar update of lab_sea/code and
107       global_ocean.cs32x15/code versions).
108     - turn on seaice Multi-category (in data.seaice, SEAICE_multDim=7) for
109       verification experiment global_ocean.cs32x15.seaice and update results.
110    o pkg/exf:
111     - new S/R EXF_GETFIELD_START to return starting-time of a forcing field
112       (according to useExfYearlyFields).
113    o pkg/cal:
114     - move calendar setting & summary (previously in cal_readparams.F) into new
115       S/R CAL_INIT_FIXED to be called later in the initialisation process, once
116       length of the simulation is set (after SET_PARMS call); This is an attempt
117       to fix Pb when, e.g.: pkg/longstep, modifies the length of the run.
118     - For safety: keep a record of pkg/cal parameter settings status
119               to allow to STOP if one pkg/cal S/R is called too early.
120     - add a stop in all basic pkg/cal subroutines if called before setting is done.
121     - modify cal_getdate.F: stop when nothing was returned;
122       if called with myIter=-1, simply retrun modelBaseDate (1,2 = startDate_1,_2);
123       this allows to remove "cal.h" from seaice_read_parms.F & init_mnc_vars.F.
124    
125    checkpoint63l (2012/04/04)
126    o pkg/bbl:
127      - fix call to FIND_RHO_2D in bbl_calc_rho.F (case multi-tiles per proc);
128        update global_with_exf output.yearly.txt file.
129    o pkg/cal:
130      - start to clean-up cal_set.F ; fix for the case where baseTime is non-zero.
131      - remove 2 unsused and very short (1 line only) functions ;
132      - remove unsused subroutines from AD-Diff list.
133    o model/src:
134      - start to implement clean wait to stop in initialization S/R (config_check.F,
135         packages_check.F, ini_parms.F and pkg/obcs/obcs_check.F + pkg/mypackage)
136    o folowing PRINT_MESSAGE changes:
137      - remove reminder multiple print to the same file (STDOUT) when multi-threads.
138    o pkg/bbl:
139      - modification so it can work with z*
140      - replace deltaT with dTtracerLev(k) for asynchronous time stepping
141      - global_with_exf/input.yearly verification; changes output.yearly.txt
142    o eesupp/src:
143      - PRINT_MESSAGE: use OpenMP critical instruction (similar to PRINT_ERROR);
144        writing to unit 0 (if unit=errorMessageUnit) extended to the case myThid=1
145      - CHECK_THREADS: specific code if using OpenMP threading: improve checking of
146        # of threads across processors (e.g., different env OMP_NUM_THREADS setting)
147      - improve special preliminary call to EESET_PARMS (if eedata is read 2 times).
148      - when using MPI, always set usingMPI=T ; set default accordingly and stop
149        if not consistent.
150      - ALL_PROC_DIE: add a BARRIER after MPI_FINALIZE call ; skip this when thread
151        argument is zero (in case called within single-thread section).
152    o pkg/fizhi:
153        clean-up turbulence cold-start switch: decided in fizhi_init_vars.F, stored
154        in common bloc (fizhi_coms.h) and then passed as argument up to S/R TURBIO.
155    o pkg/exch2:
156      - add argument "updateCorners" to S/R exch2_get_uv_bounds (enable to
157        activate EXCH_IGNORE_CORNERS in vector EXCH S/R).
158      - switch 1rst EXCH call to IGNORE_CORNERS (instead of UPDATE_CORNERS)
159        but keep the 2nd with UPDATE_CORNERS: this prevents overwriting good data
160        with bad ones coming from a not-yet-updated halo.
161        This should fix the problem when sNx <> sNy and GCD(sNx,sNy) < 2*Olx.
162    o pkg/frazil:
163        move FrzForcT diag from frazil_diagnostics_state.F to frazil_calc_rhs.F
164        http://mitgcm.org/pipermail/mitgcm-devel/2012-March/005384.html
165    o model/src/config_check.F: add a check for OLx>sNx/OLy>sNy
166    o verification/lab_sea
167      * #undef SEAICE_EXCLUDE_FOR_EXACT_AD_TESTING
168      * #define ALLOW_SST_CONTROL & ALLOW_SST_CONTROL
169      * nTimeSteps 3 -> 4
170      * changed reference output accordingly
171    o pkg/ctrl:
172      * fix ctrl_get_gen for xx_sst, xx_sss
173    o pkg/fizhi:
174      - fix 2 calls to S/R GRD2MSC (argument igrd) in update_earth_exports.F
175        update results of exp. fizhi-cs-32x32x40 (fail with only 6 digits for cg2d)
176      - by default, use new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE);
177        fix few out-of-bounds indices in referencing vars (initialise igrd to 1);
178        clean-up fizhi_turb.F (remove unused & uninitialised qdiaglsm array).
179    o pkg/gmredi:
180      - add diagnostic of Redi (main diagnonal) vertical diffusive flux of Temp
181    o pkg/fizhi:
182      - fix few initialisation and multi-tile Pb: aqualev & gridalt now pass the
183        (old)aces open64 tuv test.
184    o pkg/icefront: fix bug and reorder loop in icefront_init_varia.F
185    o pkg/mom_vecinv:
186      - fix 1 loop range in mom_vecinv.F to be like all the other loops which
187        set/update gu,gv/Diss (fix Pb of uninitialised fVerUkp in admom_vecinv
188        with non-lin free-surf).
189    o model/src: move k-loop outside of i/j-loops when (re-)computing R_low
190      in ini/update_masks_etc.F in order to avoid -O3 optimization problems with
191      some compilers (gfortran 4.6.0 on MacOS)
192    o momentum:
193      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
194        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
195        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
196    
197    checkpoint63k (2012/03/17)
198    o model/src:
199       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
200         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
201       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
202         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
203    o model/src: solve_*diagonal.F
204       - replace division with multiplication by inverse (similar to original version)
205         update output of AD exp. global_ocean.90x40x15.
206       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
207         to enable the use of the vectorized & differentiable solve_tridiagonal.F
208       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
209         vertical advection (to get solve_tridiagonal tested in AD mode).
210    o pkg/seaice: ECCO-CLIVAR merge:
211      1. seaice AREA relaxation
212         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
213         * runtime flag: SEAICE_tauAreaObsRelax
214      2. modified global mean cost imbalance code: CPP option
215          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
216    o another iteration on solve_*diagonal.F
217       Make choices independent of AUTODIFF
218       Default will be the adjoinable vectorized version.
219       Alternative choices are:
220       * non-adjoinable original version with low memory footprint:
221         #define SOLVE_DIAGONAL_LOWMEMORY
222       * still adjoinable but does not vectorize (k as inner-most loop):
223         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
224    o testreport
225     - add option to use a home made wrapper around "make"
226     - remove MITGCM_IEEE env. variable (no longer active)
227    o pkg/shelfice
228     - improve computation of friction velocity for velocity dependent
229       exchange coefficients: include velocities into SHELFICEBoundaryLayer
230       block to average velocities vertically
231     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
232    o Modify diagonal solvers, now three versions (upon request):
233      #ifndef SOLVE_DIAGONAL_AUTODIFF
234        1. default version (dating back a while ago)
235      #else /* def SOLVE_DIAGONAL_AUTODIFF */
236      # ifdef SOLVE_DIAGONAL_KINNER
237        2. adjoinable version with k-innermost loop (G. Forget)
238      # else
239        3. adjoinable vectorized version of 2.
240      # endif
241      #endif /* SOLVE_DIAGONAL_AUTODIFF */
242      All flags are currently set within routines, but could/should be moved to CPP-options.
243      Array bounds for 1. are as before, for 2.,3. cover the entire domain
244      (could be changed for 1. too).
245    o verification/lab_sea (fwd):
246      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
247        use 7 categories (except hb87), new solve4temp params (except salt_plume),
248        constant salinity (=4) or variable salinity (salt_plume) done through
249        SItracer.
250    o pkg/seaice:
251      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
252      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
253         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
254        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
255        SEAICE_freeze got retired) but already better than previously with
256        SEAICE_freeze=123456.7 deg.C;
257      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
258        (safer multi-threaded setting); always set SEAICEuseEVP;
259      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
260        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
261        stop if multiple specifications for the same coeff; make sure default
262        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
263    o pkg/obcs:
264      - allow to switch to upwind 1rst order advection scheme for the advective
265        flux computation at the open-boundary; disabled for adjoint built.
266    o pkg/ptracers:
267      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
268      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
269      - add parameter to decide when to start a tracer; use internal flag to
270        know which tracer to step-forward; switch this internal flag at the top
271        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
272        for adjoint built.
273    o pkg/seaice:
274      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
275      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
276      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
277    o pkg/ecco:
278      - fix writing of output file DiagnosCost_ClimSalt/Theta
279        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
280    o pkg/seaice:
281      - add missing initialisation of COR_ICE array in dynsolver.F
282      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
283        compiled either way, and is tested in all exps (multidim was only tested
284        in lab_sea ad before).
285      - cosmetic change to prepare for future addition of ITD. no change to results.
286        no defaults change.
287      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
288      - by lack of adequate verification experiments, I further used custom versions
289        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
290        should be correct.
291      - avoid recomputations in ad.
292    o array initialisation in adjoint mode:
293      1) pkg/mom_common/mom_calc_ke.F:
294        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
295        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
296        part this initialisation is gone, resulting in Floating Point Exception
297        (caught by open64 compiler with debug option).
298      2) model/src/convective_weights.F
299        set output convectCount over the full array range (instead of doing
300        an update): this fix a similar issue when called within recomputation (adjoint)
301        which could by-pass the initialisation (normally done in the caller S/R).
302    o pkg/seaice:
303      - final version of turbulent flux params, as agreed at MIT ice meet:
304           SEAICE_mcPheePiston (default is ~ 0.000875)
305           SEAICE_mcPheeTaper (default is 0.)
306           SEAICE_frazilFrac (defualt is 1.)
307           SEAICE_mcPheeStepFunc (default is false)
308      - changes results at trunction error level
309      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
310    o added pkg/frazil:
311      - see frazil_description.tex for details
312      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
313    o pkg/shelfice/shelfice_thermodynamics.F
314      - fix exponents for velocity dependent exchange coefficients: change
315        from 2/3(=0) to 0.66666666666666667
316      - move computation of velocity dependent exchange coefficients into
317        separate loop, so that it applies to both thermodynamics
318      - move some divisions by constants out of loops
319    
320    checkpoint63j (2012/02/16)
321    o pkg/seaice:
322      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
323      - SItracer:  added run time params, and allow coupling to ocn salinity.
324    o pkg/seaice: remove (almost) all divisions by constants within loops
325      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
326      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
327      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
328      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
329    o pkg/seaice :
330      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
331        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
332      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
333      - add permanent SItflux diag that corresponds to TFLUX but includes
334        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
335      - allow activation/testing of a fix for suspected missing term in
336        ocn-ice heat budget (to be confirmed). To test this, you want to
337        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
338        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
339      - no change in results, fwd or ad.
340    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
341      - switch to variable freezing point.
342           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
343      - bug fix : the sublimation term that was missing is now activated.
344           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
345      - bug fix : flooding sign term for SIsal0.NE.0.
346           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
347    o pkg/seaice:
348      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
349        is now the default, and the old default constant freezing point is recovered
350        with SEAICE_tempFrz0    = -1.96,
351             SEAICE_dTempFrz_dS = 0.,
352      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
353      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
354      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
355        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
356      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
357        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
358      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
359        seaice_growth r149 for legacy branch (no results change).
360      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
361        from I. Fenty).
362      - results did not change except for global_ocean.cs32x15, mostly due to the
363        switch to variable freezing point (see above item for detail).
364    o pkg/thsice:
365      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
366        seawater freezing in thsice_calc_thickn (not used).
367    o pkg/seaice: turbulent flux term specification via run time params.
368      - replace CPP switches with run time switches to facilitate testing
369      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
370                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
371      - added runtime parameter : SEAICEturbFluxFormula
372      - move Mcphee constants to SEAICE_PARAMS.h
373      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
374                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
375                 remove seaice_summary call (moved to seaice_init_fixed)
376      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
377        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
378      - seaice_summary.F : add missing report of read turbulent flux term set up
379                           and SITRACER.
380      - seaice_check.F : check range; inform and stop if retired CPPs are used
381                         (incl. SEAICE_AGE).
382      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
383             CPP switch, same computation as before for the different options.
384      - change results at the truncation level.
385    o pkg/seaice:
386      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
387        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
388        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
389      - update verification/*/input*/data.seaice:
390        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
391        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
392        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
393        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
394    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
395      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
396        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
397        difference in results only due to machine truncation.
398      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
399        MaykutPolySatVap; keep MIN_LWDOWN.
400      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
401      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
402        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
403    o pkg/salt_plume:
404      - isolate saltPlumeFlux array exch into a specific S/R called from
405        do_oceanic_phys.F
406      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
407    o verification:
408      - move untested set-up to MITgcm_contrib/verification_other.
409    o pkg/seaice:
410      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
411    o pkg/seaice:
412      - seaice_solve4temp.F (keeping results unchanged):
413        * add 2 future run-time params to select which saturation vapor pressure
414          formula is used and how post-iteration fluxes are set.
415          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
416        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
417          the linearized expression to stay consistent with tsurf finding.
418      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
419        can be < 0.
420    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
421      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
422        conductive heat flux F_c , and add it explicitly when updating tsurf as
423        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
424        so that now F_ia has a consistent meaning through the entire routine.
425        This causes differences at truncation level: update output of fwd exp.
426        global_ocean.cs32x15.seaice.
427    o pkg/seaice:
428      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
429        of arrays, sign/direction of fluxes; no effect on results.
430      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
431        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
432        note: this should have been done before changing celsius2K default.
433      - to keep results unchanged, add back old value of celsius2K in verification
434        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
435      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
436        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
437        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
438        freezing temp is consistent with value in seaice_growth.F ; this causes
439        differences at machine truncation level: update lab_sea AD output (3/4).
440    o pkg/seaice:
441      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
442        and climsst/sss even when using seaice (to prevent calculation that might
443        use SST on land); does not affect any verification exp.
444      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
445        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
446    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
447      over land (non-legacy code)
448    o vectorize salt_plume package:
449      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
450      - this code computes plumebk everywhere (also over land), thus requires
451        code to avoid divisions by zero and catch the case of kLev=Nr.
452      - efficiency of salt_plume_frac is still sub-optimal
453    o tools (genmake2):
454      - fix makefile NAME specification (option: -makefile NAME) by adding
455        "-f $MAKEFILE" in few places where it was missing including makedepend
456        command (contribution from Paul).
457    
458    checkpoint63i (2012/01/24)
459    o model/src:
460      - add factorized versions of some EOS code to find_rho.F,
461        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
462    o model/src:
463      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
464      - change default celsius2K from 273.16 to 273.15
465      - to keep results unchanged, add back old value of celsius2K in verification
466        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
467         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
468    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
469      to make TAF generate vectorizable code
470    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
471       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
472       have flags that do this more efficiently.
473    o pkg/diagnostics/diagstats_calc.F
474      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
475    o pkg/obcs (with exch2):
476      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
477        and remove code (in obcs_readparms.F) which was based on EXCH of indices
478        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
479    o pkg/exf and seaice exp:
480      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
481        so that switching off area & heff advection flags does not affect results.
482      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
483      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
484        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
485        results of verification experiments: 1D_ocean_ice_column(fwd),
486        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
487        and offline_exf_seaice (all 4).
488    o pkg/seaice:
489      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
490        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
491      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
492        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
493        not multi-dim advection;
494      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
495        SHORTWAVE_HEATING #undef.
496    o optim: make Makefile more robust (?)
497    o pkg/obcs:
498      * fix treatment of obcs_read_pickup for TAF
499    o pkg/shelfice:
500      * add missing initialisation of num_shifwflx
501      * new adjoint verification exp. for isomip
502      * change Prandtl and Schmidt numbers from generic formulations
503        (in terms of model diffus. and visc.) to separate runtime
504        parameters, with Holland and Jenkins (1999) default values.
505    o pkg/exf (interpolation):
506      - extended input field (2 rows) near the N & S poles:
507        * fill in with the symetric value (when even Nb of data in longitude)
508        * add average value at the poles only for scalar quantities ; for vector
509          component interpolation, skip the averaging and keep duplicated values,
510          unless the 2 components have same location (uvInterp=T) in which case
511          interpolate the 2 components together using S/R EXF_INTERP_UV.
512      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
513        together: this allows to account properly for local orientation when
514        averaging at N & S pole.
515      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
516        exf-interpolation near N & S poles. Undef by default.
517      - add debug check/print on 1rst iter if debugLevel >=2.
518    o pkg/exf:
519      - change masking flags definition (no longer "parameter"), put them in
520        common block and set them in S/R EXF_INIT_FIXED.
521      - change recognized masking flag from s,u,v to c,w,s since the mask
522        to use (maskC,W,S) depends on position on model grid and has little to
523        do with scalar/vector difference; fix masking if using P-coordinates.
524      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
525        and update results of exp. global_with_exf (x2).
526      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
527    o pkg/obcs
528      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
529    o pkg/exf (interpolation):
530      - assume periodicity in X only if input field cover full longitude range.
531      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
532        and should vectorise).
533      - fix input lat of the 2 added row (in case we provide N.pole data).
534    
535    checkpoint63h (2011/12/30)
536    o pkg/seaice:
537      - change declaration of UVM from _RL to _RS in order to get B-grid
538        uIce,vIce monitor when _RS = real*4
539    o pkg/offline:
540      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
541      - compute vertical velocity if not read from file (switch on exactConserv
542        & staggerTimeStep);
543      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
544    o verification:
545      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
546        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
547        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
548      - update output of exp. global_ocean.cs32x15.viscA4 after changing
549        grid-file angles (used here for coriolis-3d);
550      - remove (or gzip) few files not needed to run fizhi-cs experiments.
551    o pkg/exf (vector interpolation):
552      - rotate vector component toward local grid-axis orientation using grid-angles
553        (stored in GRID.h) instead of locally computed rotation angle; keep old code
554        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
555    o pkg/seaice:
556      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
557        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
558    o pkg/PKG_OPTIONS.h files:
559      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
560        outside of the #ifdef ALLOW_THISPKG / #endif block.
561      - update verification/*/code/PKG_OPTIONS.h files.
562    o add a verification experiment (offline_exf_seaice/input.seaice) that test
563      the B-grid LSOR solver
564    o pkg/seaice: sort out emissivity and long wave radiation step 2:
565      - add emissivity for snow and ice as new run-time parameters
566        (unfortunately) that default to the corresponding exf values; this
567        changes results in most verification experiments so that for backward
568        compatibility these parameter have to be set explicitly to inconsistent
569        values (ugly);
570      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
571        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
572        until we agree how to handle this bug properly
573    o pkg/exf (interpolation):
574      - add a set of run-time param ({inputfield}_interpMethod), one for
575        each interpolated input field, to select the interpolation method
576        with a value of zero switching off the interpolation;
577      - print interpolation parameters to standard output;
578      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
579        (to use instead runoff_interpMethod=0 in data.exf).
580      - simplify default setting of interpolation parameters (for all fields,
581        set position to match model grid cell-center position, leading to trivial
582        interpolation in case of regular Lat-Lon grid) and fix for the case of
583        non-uniform delY.
584    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
585       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
586       this factor is absolutely required, because the lw exitance (= out-going
587       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
588       where the reflectivity rho = 1-emissivity for conservation reasons. Once
589       this is established, we can remove the CPP-Flag (if we want to).
590    o pkg/seaice:
591      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
592        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
593      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
594        what the name implies (and not emissivity*BoltzmannConstant), this means
595        the old default value of 5.5e-8 now means
596        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
597        S/R exf_readparms
598      - FV-discretization of the B-grid LSOR solver, turn on with
599        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
600        of the calling routine dynsolver, so that B and C-grid code look a
601        little more alike.
602      - fix index bugs in ostres.F (B-grid code)
603    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
604    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
605      default for SEAICE_emissivity, if useEXF; requires setting a wrong
606      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
607      backward compatiblity
608    o model/src: use sigmaR in calc_ivdc
609    
610    checkpoint63g (2011/12/16)
611    o pkg/seaice/seaice_growth.F:
612      fix heat conservation of the coupled ocean-seaice system.
613      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
614      solid vs liquid water treatment is resolved via QNET.
615    o pkg/seaice/seaice_growth.F:
616      add missing term for sublimation in saltFlux, which was breaking conservation.
617    o pkg/seaice/seaice_model.F:
618      Remove this patholigical case treatment in evolution branch,
619      where it is un-necessary and breaks conservation.
620      Update global_ocean.cs32x15/results accordingly for
621      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
622    o model/src:
623      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
624      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
625    o pkg/obcs:
626      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
627      tendency for temperature and salinity that is then applied to update
628      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
629      horizontal advection and diffusion contributions on the boundary (in
630      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
631      removing the mask in S/R timestep_tracer. The advantage of this approach is
632      that the updated tracer values include contributions from the surface
633      forcing and vertical diffusion.
634      This modification changes exp4.stevens because of vertical diffusion.
635    o model/src:
636      change non-curvilinear grid setting to also work with exch2 + blank tiles:
637      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
638        face dimensions.
639      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
640        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
641        and INI_SPHERICAL_POLAR_GRID.
642      change test-experiment global_ocean.90x40x15:
643      - split the domain in many more tiles (9x4 tiles of 10x10 each);
644      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
645      - update results of both test (std & dwnslp).
646    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
647       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
648    o model/src:
649      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
650        and fix initialisation when using sigma-coords.
651    o model/src:
652     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
653       to their current value at the beginning of forward_step.F": add a new run-time
654       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
655     - set doResetHFactors=T in the following test exp:
656        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
657        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
658        and tutorial_global_oce_in_p (nonLinFS in p)
659    o pkg/ecco
660      - added IES cost term
661    o verification/advect_xz
662      - scale down the depth by 1/100 (from 200 km to just 2.km)
663      - add secondary test using divergent flow, r-star and implicit vertical advection.
664      - add note (check_conserve_TS.txt) and matlab script to check global
665        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
666    o pkg/rbcs:
667      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
668    o pkg/obcs (Stevens BCs):
669      - fix various problems in the phase speed computations of the Stevens
670        boundary conditions:
671        - sign error for western and southern boundaries,
672        - time tendencies were underestimated by factor of dTracerLev and some just
673          zero (for multidim advection schemes) -> now estimate time tendencies
674          from difference between previous (n) time level and the one before (n-1);
675          this requires storing a field per tracer per boundary, also in the pickup
676          files.
677        - replace deltaTmom in cflMer/Zon computation with dTracerLev
678        - set default phase velocity to cflMer/Zon
679      - update verification experiment exp4.stevens
680    o pkg/generic_advdiff (implicit_r):
681      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
682        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
683      - fix implicit vertical diffusion or advection with NonLin FreeSurf
684        (was using current recip_hFacC instead of future recip_hFacC): set future
685        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
686        solver S/R ;
687      - fill diagnostics of vertical advective fluxes (computed from tendency)
688        when using implicit vert. advection;
689      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
690         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
691         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
692         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
693    o pkg/diagnostics:
694      - add diags for T & S tendency which goes through Adams-Bashforth.
695    
696    checkpoint63f (2011/11/30)
697    o pkg/obcs/obcs_calc_stevens.F:
698      - join some loops to reduce number of if-statements
699      - fix a bug in code for northern and southern boundaries.
700    o pkg/seaice/seaice_init_varia.F
701      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
702        caused zero ice-velocities for the B-grid code
703    o pkg/seaice/seaice_init_fixed.F
704      - fix a bug in the initialisation of the second metric terms
705        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
706      - this affects all seaice configurations with useCurviLinearGrid = .true.
707        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
708        = .true. (default)
709      - the only verification experiment affected is global_ocean.cs32x15:
710        icedyn, seaice, and seaice_dynmix (AD)
711    o pkg/thsice/thsice_diagnostics_state.F
712      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
713        not contain garbage that can lead to surprises in diagstats_calc.F
714    o model/src:
715      - move bi,bj loops inside INTEGR_CONTINUITY ;
716      - call INTEGR_CONTINUITY directly from forward_step.F
717        (previously called from momentum_correction_step.F)
718      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
719        forward_step.F and pkg/ecco/the_main_loop.F
720    o model/src/do_oceanic_phys.F:
721      - reset addMass to zero only if useICEFRONT ;
722      - separated k-loop for rhoInSitu calculation ;
723      - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
724        and at constant T,S (= WdRHOdP);
725      NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
726        of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
727        transport of locally-referenced potential density);
728        to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
729    o gluemnc:
730      - replace ncrcat with ncks when adding variables to *.glob.nc
731      - change the way variables without record dimensions are handled so that
732        files that have variables with and without record variables can be glued:
733        add a record dimension with a new unique name to be able to differentiate
734        between variable with and without a-prior record dimensions. Remove
735        this record dimension before adding the variable to the *.glob.nc file.
736        This procedure automatically works also for grid.*.nc files that do not
737        have any record dimension.
738    o verification/cpl_aim+ocn:
739      - generate new reference output on baudelaire (gfortran, mpich2) (previously
740        from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
741    o pkg/obcs/obcs_calc_stevens.F:
742      - add code for northern and southern boundaries.
743      - reorder some loops to save some operations and so that drFBar can be scalar
744    o model/src:
745      - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
746        truncation) and add diagnostics for Adams-Bashforth tendency increment.
747      - update test-exp. AD output:
748        1D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
749      and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
750        front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
751        global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
752        matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
753        tutorial_global_oce_in_p, tutorial_global_oce_latlon and
754        tutorial_plume_on_slope.
755    o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
756      that vectorises. This code uses 3 extra 2D fields, F90 array assignments
757      and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
758      does not even come with an F77 compiler anymore, this should not be
759      a limitation
760    
761    checkpoint63e (2011/11/06)
762    o pkg/seaice adjoint of LSR:
763      - substantially rework STORE dirs.
764      - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
765        this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
766        and only perform SOLV_MAX_FIXED adjoint iters.
767        If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
768        always goes to same record, meaning that the last forward field will be
769        the one used in the adjoint - an approximation.
770      - now produces non-zero LSR-related gradients, and acceptable gradients for
771        An's zonal (x-z) test case (to be checked in)
772      - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
773        (but these are screwed up by the thermodynamics in the first place);
774        reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
775        output_adm.txt also reflects changes to seaice_lsr
776      - global_ocean.cs32x15:
777        * the "default" input_ad.seaice has been re-defined to always exclude dynamics
778          (output_adm.seaice.txt was updated)
779        * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
780          (output_adm.seaice_dynmix.txt)
781    o test-exp. exp4+stevens:
782      - switch off pTracers and nonHydrostatic (restart problems with NH); update output
783    o pkg/seaice (lsr solver):
784      - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
785        update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
786      - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
787      - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
788        into initial guess for linearised solver; use weight ~ (1/err)^2,4.
789      - compute (with new S/R) and print initial (+ free-driff sol. if available)
790        and final residual of linearised system.
791    o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
792      (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
793    o pkg/obcs: Stevens BCs (still only for east and west)
794      - fix Stevens BCs by using intermediate velocities of previous
795        time step as "baroclinic" contribution rather velocity of one grid cell
796        inside the boundaries; more consistent but makes the entire treatment
797        more complicated, requires new pickup files and two new S/Rs:
798        obcs_copy_uv_n and obcs_save_uv_n
799        keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
800        (undefined by default)
801      - silently move computation of some grid factors into separate loops to
802        save some recomputations
803      - add a hack for non-linear free surface
804      - add a verification experiment to exp4 that tests this code
805    o make gluemnc/xplodemnc work with (moron) non-GNU shell tools
806    
807    checkpoint63d (2011/10/25)
808    o pkg/obcs + seaice-dynamics:
809      - new implementation calls OBCS_APPLY_UVICE (in seaice_dynsolver.F) before
810        solving for uIce,vIce and prevent SEAICE_LSR or SEAICE_EVP to modify OB
811        values (consistent with an implicit method).
812      - add option OBCS_UVICE_OLD (in OBCS_OPTIONS.h, defined by default) to
813        return to older implementation (same results as before); note that none of
814        the "experimental" OBCS_SEAICE options are implemented in the new version.
815      - switch test exp. seaice_obcs to use new version (update output).
816    o pkg/seaice:
817      - add few stop (B-grid & CS-exch, B-grid & obcs, AUTODIFF & SEAICE_maskRHS)
818      - add parenthesis in Water-Ice drag calculations (evp & lsr);
819      - in seaice_lsr.F, simplify and fix AA3 setting in case sNx or sNy=1;
820        and fix case SEAICE_waterDrag=0 (but unstable if no or little seaice)
821      - update output of test exp lab_sea that uses evp or lsr (fwd+ad)
822        and global_ocean.cs32x15 (icedyn & seaice fwd+ad).
823    o pkg/layers:
824      - Include potential density as new coordinate (Thanks to David Munday)
825    o pkg/dic:
826      - Remove subroutine CALC_PCO2_APPROX_CO3 from carbon_chem.F and add
827        carbonate computation/output to CALC_PCO2_APPROX
828    o pkg/generic_advdiff
829      - make TAF generate code that vectorizes:
830        gad_dst3fl_adv_*.F, gad_u3c4_impl_r.F
831    o model/src:
832      - improve vectorization also for adjoint code of
833        solve_tridiagonal and solve_pentadiagonal. As this requires up to
834        5 new 3D-fields, this code is only turned on for the combination of
835        ALLOW_AUTODIFF_TAMC and TARGET_NEC_SX. Also remove error message
836        for singular matrix check (only for TARGET_NEC_SX).
837      - remove hard-wiring of CPP-flag ALLOW_SOLVERS_KLOOPINSIDE to
838        ALLOW_AUTODIFF. This flag now needs to be set outside of
839        solve_tri/pentadiagonal.F
840    o pkg/exf:
841      - fix previous modif in exf_readparms.F (revision 1.66: treatment of
842        optional namelist EXF_NML_OBCS).
843      - add many debug-print (to trace down where pkg/cal error msg comes from)
844    o pkg/mom_vecinv/mom_vi_hdissip.F
845      - rearrange loops so that vectorization is improved and in particular
846        the adjoint routine vectorizes. The code is a little longer now, but I
847        think easier to read.
848        Note: CPP-flag MOM_VI_ORIGINAL_VISCA4 is not tested.
849    o pkg/seaice:
850      - allow to specify initial seaice velocity from files (uIceFile,vIceFile)
851    o pkg/exch2:
852      - alternative code (without tile x tile matrix) for cumulated (global) sum;
853        used as default; keep using matrix version in adjustment.cs-32x32x1.
854    o tools/build_options:
855      - after merging some MPI and/or multi-threads specific optfiles so that
856        the modified default optfile support both built (using genmake2 -mpi
857        for the MPI built, using genmake2 -omp for OpenMP built),
858        move now obsolete optfiles to tools/build_options/unsupported/
859       (add copy of email sent to support list in doc/optfiles_changes.txt)
860    
861    checkpoint63c (2011/09/28)
862    o pkg/ebm:
863      - fix ebm_zonalmean.F for several procs in Ydir (nPy > 1); update output of
864        test exp. global_ocean_ebm (affects machine truncation, 12 digits for cg2d)
865    o pkg/seaice (SItracer pickup)
866    * Simple code for pickup of SItracer fields (#define ALLOW_SITRACER)
867      To be done:
868      - thorough testing of missing fields in S/R seaice_read_pickup
869      - thorough matching between generic tracers and specific fields used
870        (e.g. volume-weighted age, area-weighted age, salinity, ...)
871    o pkg/grdchk:
872      - all procs calculate and print finite-difference gradient (for testreport)
873      - change description output used by testreport;
874      - AD testing: also compare and report Finite-difference gradient;
875        => update all output_adm*.txt
876    o test exp. global_ocean_ebm:
877      - switch back useRealFreshWaterFlux (no problem anymore with run-off);
878        and turn on exactConserve; update (fwd) output.
879    o pkg/seaice (LSR):
880      - print to STDOUT number of solver iterations at SEAICE_monFreq interval.
881      - modify solver to deal cleanly with u/v switch at face edges (CS-grid):
882        * identical results with non-CS topology (but save up to half of EXCH calls)
883        * no much changes in cs-32 verification tests since no ice at face edges
884         (differences due to convergence criteria, since nb of iterations changed)
885        * expect some differences on lat-lon-cap grid.
886        update FWD results of global_ocean.cs32x15 test exp. (icedyn & seaice)
887    o pkg/exch2:
888      - add new CPP option to disable Cumul-Sum matrix (to save storage when using
889        many tiles); until alternative coding is added, just add a stop.
890    o pkg/kpp:
891      - move ptracer/salt correction to KPP diffusivity from calc_3d_diffusivity.F
892        to S/R KPP_CALC_DIFF_PTR (+ add tracer-index to argument list).
893    o optfiles:
894      - merged few MPI specific (*+mpi*) and multi-threads specific (*+mth) optfiles
895        into corresponding standard one, which now support different build:
896        (when using "genmake2 -mpi" for MPI built, "genmake2 -omp" for OpenMP built)
897      - add "darwin_amd64_gfortran" optfile (initially from Constantinos, tested by Gael)
898    o pkg/obcs (seaice):
899      - add missing EXCH for uIce,vIce after applying OBCS;
900      - remove S/R EXF_SWAPFFIELDS_X/Y , disable S/R EXF_SET_OBCS_X/Y by adding
901        argument = number of levels to S/R EXF_SWAPFFIELDS_XZ/YZ and S/R
902        EXF_SET_OBCS_XZ/YZ ; update obcs_exf_load.F;
903      - fix EXF_SET_OBCS_XZ/YZ for multi-threaded (assuming loaded arrays are shared)
904      - verification exp. seaice_obcs: split domain in 2 tiles ; add SIZE.h_mpi
905        and eedata.mth for MPI and mutlti-threaded testing.
906    o pkg/flt:
907      - make FLT EXCH working with multi-threads (and MPI + multi-threads);
908      - use buffer for floats IO (trajectories & profiles); size set in FLT_SIZE.h;
909      - fix pickup and trajectories + profiles output with multi-threads;
910      - add parameter to select group of fields to write along trajectory and
911        profile (default unchanged);
912      - only call PORT_RAND* function when flt_noise <> 0;
913      - add multi-threaded test for verification exp. flt_example.
914    o eesupp/src:
915      - fix S/R ALL_PROC_DIE for MPI+multi-threads.
916      - USE_OMP_THREADING: check that number of threads (from eedata) matches
917        actual number (from env.var. setting).
918    o pkg/ebm:
919      - fix multi-threading in ebm_area_t.F ; clean-up EBM.h header file.
920      - add multi-threaded test for verification exp. global_ocean_ebm
921    
922    checkpoint63b (2011/08/29)
923    o pkg/ebm:
924      - fix sign of runoff;
925      - update directly forcing fields (Qnet,EmPmR) to use standard
926        external_forcing_surf.F (remove ebm_forcing_surf.F);
927      - avoid loading forcing fields a 2nd time (1rst time from ini_forcing.F);
928      - set either tauThetaClimRelax (in data) or tauThetaZonRelax (in data.ebm)
929        and apply relaxation towards corresponding SST field (2-D map or ZonAver).
930      - update global_ocean_ebm parameters file data and update output (fwd+ad).
931    o verification/matrix_example:
932      - split domain in 8 tiles (2x4); add SIZE.h_mpi and eedata.mth for
933        MPI and mutlti-threaded testing.
934    o pkg/matrix:
935      - change name of S/R MATRIX_INIT to S/R MATRIX_INIT_VARIA ;
936      - fix for multi-tiles (add bi,bj indices to exp/impMatrixCounter);
937      - fix for multi-threaded (remove DATA statement);
938      - use standard DIFFERENT_MULTIPLE function;
939      - add MATRIX_OPTIONS.h
940    o verification/matrix_example:
941       To allow to split the domain in several tiles, change the domain size
942        from 31x31 to 32x32 by adding 1 row (on Southern side) + 1 column (on
943        Western side) of land points.
944    o (*_)write_pickup:
945      - fix few bugs in mypackage_read/write_pickup.F
946      - in MDS_WR_METAFILES calls, replace "myTime" by a local copy into
947        array of length 1 (was caught by compiler syntax-check).
948    o pkg/diagnostics (velocity potential solver):
949      - fix initialisation of main diagonal matrix (for overlap values)
950    o tools/build_options:
951      - towards single optfile for MPI and non-MPI built: merge few +mpi optfile
952        into previously non MPI one (linux_am64 pgf77,open64,pathf90,ifort11)
953      - linux_amd64_gfortran: merge +mpi_generic version into standard optfile:
954        * move IEEE flags to DEVEL section; take IEEE flags from +mpi_generic ;
955        * FAST case: for now, keep -O3 with ini_masks_etc.F in NOOPTFILES list;
956        and use "-devel" testreport option for standard testing on baudelaire.
957    o pkg/grdchk:
958      - Assume that all gradient-check position are within the same tile
959        corresponding to global indices (iGloTile,jGloTile) and that
960        positions (i,j indices or nbeg) are local to this tile;
961      - set tile local-indices and proc. number according to tile global-indices;
962      - remove grdchkwhichproc from namelist (retired param);
963      - send adjoint gradient to all procs so that all procs print it to STDOUT;
964      - switch on MPI test for global_ocean.90x40x15 AD test experiment.
965    o adding package bbl (Bottom Boundary Layer)
966      description in MITgcm/pkg/bbl/bbl_description.tex
967      example/test experiment in MITgcm_contrib/bbl
968    o adjoint verifications
969      - changed 5 experiments to multi-tiles
970        * global_ocean.90x40x15
971        * obcs_ctrl
972        * offline_exf_seaice
973        * tutorial_dic_adjoffline
974        * tutorial_tracer_adjsens
975        changed reference output for those that crossed tile boundaries
976        (changed choices of gradient check positions)
977      - with same tiling, switch on MPI test for the last 4 (add SIZE.h_mpi)
978      - temporary bug fix in grdchk_loc.F for obcs
979    o genmake2 & testreport
980      - add target "obj" (just for OBJFILES files) to Makefile;
981      - add option to specify FEXTRAFLAGS on command line.
982    o pkg/mypackage:
983      - remove bi,bj arguments from argument list of S/R MYPACKAGE_CALC_RHS
984    
985    checkpoint63a (2011/08/02)
986    o pkg/diagnostics (velocity potential):
987      - fix velocity-potential calculation when using OBCS: balance net inflow
988        at each level (new S/R OBCS_DIAG_BALANCE).
989      - fix some of the problems with OBCS in stream-function calculation.
990    o pkg/exf/exf_readparms.F
991      - make treatment of optional namelists (EXF_NML_04, EXF_NML_SGRUNOFF,
992        EXF_NML_OBCS) more consistent, so that you need not have these lists
993        in data.exf when they are not used.
994    o optim/optim_readdata.F:
995      - add some output about obcs variables that might help debugging
996      - add a check about nvarlength
997    o pkg/ctrl: once again, fix computation of endrec in s/r ctrl_init_rec
998    o pkg/diagnostics (velocity potential):
999      - fix mask for OBCS (still problems in stream-function with OBCS);
1000      - add specific parameter (default = main code CG2D params) for solver;
1001      - in case of poor convergence, use solution corresponding to lowest residual.
1002    o pkg/seaice/seaice_growth.F: small changes that permit vectorizable
1003      adjoint code. In general statements like tmpscal=fld(i,j) are problematic
1004      and should be avoided where possible.
1005    o model/src (rStar):
1006      - include r* effect on reference-state (PhiRef) in totPhiHyd
1007        (so that it's really the potential anomaly at the cell center);
1008        affect solution only if z* with full pressure in EOS.
1009      - test-exp global_ocean.90x40x15: reduce viscA4 (was not stable) and
1010        update output (because of z* in totPhiHyd and viscA4 changes);
1011      - keep the previous diagnostics as "PHIHYDcR" (closer to potential anomaly
1012        @ constant r) until interpolation at constant r is implemented.
1013    o pkg/diagnostics
1014      - fix RCENTER diagnostics in case cell center is not at interface middle
1015    o add code for TEOS-10 (www.teos-10.org, McDougall et al. 2011). Use
1016      this eos with eosType = 'TEOS10', in data (PARM01). This eos implies
1017      that THETA and SALT are "conservative temperature" and "absolute
1018      salinity"
1019    o pkg/ctrl
1020      - fix computation of endrec in s/r ctrl_init_rec
1021      - ctrl_pack/unpack_*: remove unused variables and some obsolete code
1022    o pkg/seaice/seaice_growth.F
1023      - fix recomputation with FENTY_AREA_EXPANSION_CONTRACTION code,
1024        remove then obsolete STORE directives
1025      - fix STORE directives for tice and tices, so that only the
1026        appropriate part of the fields are stored (and not the entire
1027        field); update global_ocean.cs32x15.seaice AD output.
1028      - cosmetic changes: adjust CPP flags and indentation for better
1029        legibilty
1030    o pkg/autodiff: add mnc-output of adBottomDragFld (code contributed by
1031      Chris Wilson)
1032    o pkg/gmredi:
1033       Add Sub-Meso Eddies parameterisation from Baylor (for now, disabled with TAF),
1034       and test it in verification exp. "front_relax.bvp" (update output.bvp.txt)
1035    
1036    checkpoint63  (2011/07/11)
1037    o pkg/exch2:
1038     - rename+move: nTiles in W2_EXCH2_PARAMS.h --> exch2_nTiles in W2_EXCH2_TOPOLOGY.h
1039     - exch2 version of Cumul-Sum routine: S/R W2_SET_MAP_CUMSUM set up the
1040       (2*nTiles)x(nTiles) Cumul-Sum matrix and Master Proc collects all tiles X,Y
1041       increments, calculates Cumul-Sum @ tile origin and sends results to each tile.
1042    o pkg/diagnostics:
1043     - deal with pairs of post-processed diags which are computed together; in
1044       particular, re-order list of diags within 1 file to save 2nd computation.
1045     - add S/R to compute velocity stream-function (called after velocity-potential
1046       calculation) from divergence free transport -> new diagnostics "PsiVEL".
1047     - add parameter to select grid-point location where PsiVEL == 0.
1048    o eesupp/src:
1049       new S/R to calculate cumulated sum on tiled array, corner grid-cell location
1050       (specific S/R needed with exch2 topology - for now, just print an error msg)
1051    o pkg/shelfice
1052     - Implement friction velocity-dependent transfer coefficients following
1053       Holland and Jenkins, JPO, 1999
1054       Original code by M. Losch with small modifs.
1055       Enable with CPP option SHI_ALLOW_GAMMAFRICT
1056       and runtime flag SHELFICEuseGammaFrict
1057    o verification lab_sea & global_ocean.cs32x15:
1058     - use tools/xmakedepend (instead of cyrus_makedepend, in genmake_local):
1059       does not miss some dependencies (but is slower) and also works with many files
1060       (default makedepend limitation for AD built).
1061     - use cyrus_makedepend in adjustment.128x64x1 (so that it still tested).
1062    o pkg/diagnostics:
1063     - add run-time parameter "useMissingValue" (def=False) to fill land-point
1064        (i.e., where mask=0) with MissingValue ; used only in MNC output file.
1065       This replaces CPP-option DIAGNOSTICS_MISSING_VALUE.
1066     - Extend the use of "missing_value" setting from data.diagnostics for the case
1067       of counter-diagnostics (where fraction-weight is zero). This applies both to
1068       MNC and MDS output files.
1069    o pkg/seaice/seaice_growth.F:
1070      - add 'a priori' cap of latent heat flux based on actual mass considerations
1071        when SEAICE_ADD_SUBLIMATION_TO_FWBUDGET is used in conjunction with the
1072        non-legacy seaice_solve4temp.
1073      - add diagnostic of the residual sublimation freshwater flux (the freshwater
1074        flux taken from the ocean if the total actual latent heat fluxes exceed
1075        the maximum)
1076      - remove the CPP switch around the *_FWbySublim unit change and move diagnostic
1077       fill for SIatmQnt, SIfwSubl, SIatmFW to the end of seaice_growth.F.
1078      - add diagnostic of the actual sublimation freshwater flux (that is 0. ifndef
1079       SEAICE_ADD_SUBLIMATION_TO_FWBUDGET) and of the latent heat flux (evap+sublim).
1080      - bug fix : frWtrAtm needs a_FWbySublim ifdef SEAICE_ADD_SUBLIMATION_TO_FWBUDGET.
1081      - bug fix : missing part to Martin's r_FWbySublim pathological case fix.
1082    o verification 1D_ocean_ice_column:
1083       made model domain truly 1x1x23 instead of 5x5x23 with only center cell (3,3,:) wet
1084       update results
1085    o pkg/diagnostics:
1086     - Implement setting of "Post-Processed" diagnostics (corresponding to gdiag(5)='P')
1087       which are not filled-up but computed from other diags ; In this case, the mate
1088       diag points to the primary (filled-up) diag to used for post processing.
1089     - Update Velocity-potential computation using post-processed diag framework.
1090     ==> Change the ordering of fields and time-periods in MDS output file
1091       when using periodic averaging: now writes one time record with the full set
1092       of fields for this time period, then the next time reccord (it used to be
1093       one field with the full set of time records then the next field).
1094         Note: this is now similar to NetCDF (MNC) output file. <==
1095    
1096    checkpoint62z (2011/06/21)
1097    o adjoint monitor:
1098     - Add adjoint monitor output for packages exf, seaice
1099       and update relevant testreport output
1100    o pkg/seaice:
1101     - re-order diags inits so that they appear in order in available_diagnostics.log
1102     - added diags: hsnow thermo. rates of change, area preceeding ridiging process,
1103       area/heff/hsnow preceeding thermodynamic growth/melt.
1104     - modified diag: SIdA; output actual effect, as the description states.
1105     - modified description: SIqneti, SIqneto, SIuheff, SIvheff, SIdAb*, HSNOW.
1106     - retired redundant diags: SIyneg, SIfice, SIsnwice, SIthdgrh.
1107       (SIyneg->SIdHbOCN; SIfice->SIdHbATC; SIsnwice->SIdHbFLO;
1108        and SIthdgrh->SIdHbOCN+SIdHbATC+SIdHbATO)
1109     - modified diags (2) : switch all SIdA*, SIdH*, SIdS* from delta to rates.
1110     - added diagnostics for seaice generic tracers (SItr*).
1111     - added SItrUnit and SItrNameLong run time param (for SItr* diags).
1112     - in diag names, replaced 'PrTh' abbrev. of 'preceeding thermo' with 'PT'.
1113     I. Fenty: 18-Jun-2011:
1114     Minor changes to seaice package:
1115     1) Retired old variables (A22, SEAICE_lhsublim, areaMax, areaMin, hiceMin) and
1116        added some new ones (SEAICE_area_reg, SEAICE_hice_reg, SEAICE_area_floor)
1117       - Differentiated "regularization variables" from "floor variables"
1118        * areaMin became SEAICE_area_reg (old A22) and SEAICE_area_floor
1119        * hiceMin became SEAICE_hice_reg (old hiceMin)
1120          (with _reg meaning regularization variable)
1121       - SEAICE_lhSublim becomes lhSublim, the sum of SEAICE_lhEvap and SEAICE_lhFusion
1122        so as to ensure energy conservation when going between phases
1123      - A22 was not used anywhere
1124     2) Changed regularization procedure for heffActual and hsnowActual to ensure
1125        well-boundedness and smooth adjoint in seaice_growth.F
1126     3) Fixed a bug where seaice_solve4temp would not recognize ice-free grid cells
1127        because the old regularization always set heffActual >= 0.05 cm
1128     4) Changed the model so that the default behavior is to put a small (10^-5) "floor"
1129        on AREA when HEFF > 0.
1130      - went from requiring ALLOW_PRECLUDE_INFINITESIMAL_AREA to be defined to
1131        requiring that DISABLE_AREA_FLOOR *not* be defined
1132     Affected verifications:
1133      - 1D_ocean_ice_column (output.txt output_adm.txt)
1134      - global_ocean.cs32x15 (output.seaice.txt output_adm.seaice.txt)
1135    o pkg/diagnostics:
1136      - move MNC code from diagnostics_out.F into new diagnostics_mnc_out.F (2 S/R).
1137      - rename S/R GETDIAG to DIAGNOSTICS_GET_DIAG and change type of 1rst argument
1138        (was _RL, now integer) with option = 0 to retrieve all levels.
1139      - add pieces of code to compute velocity potential at each level (new diagnostics
1140        PhiVEL, works only when UVELMASS & VVELMASS are also turned on);
1141        for now, using same params as CG2D (target-resisual, max Nb of iter ...).
1142      - fix few issues with counter diagnostics in diagnostics_setdiag.F &
1143        diagstats_setdiag.F (if diagnostic counter is itself a counter diag)
1144        and in diagnostics_fract_fill.F (do not need a valid pointer for the
1145        diagnostics counter-mate); check that definition of counter-diagnostic
1146        includes a valid counter-mate (in diagnostics_set_levels.F).
1147    o model/src (rStar):
1148      - add rStar scaling factor in diags_phi_hyd.F (similar to calc_grad_phi_hyd.F);
1149        affect solution only if z* with full pressure in EOS;
1150        update output of test-exp global_ocean.90x40x15.
1151    o pkg/seaice:
1152      - introduce siEps=1e-5 parameter
1153      - use areaMax in AREA update (part 4), consistent with ridging step (part 2.5).
1154      - re-organize SEAICE_ADD_SUBLIMATION_TO_FWBUDGET code.
1155      - introduce ALLOW_SITRACER and seaice_tracer_phys.F to handle generic seaice tracer.
1156        For now it covers, and was tested for, ice salinity and age (attached to HEFF),
1157        as well as ice cover age and ridging index (attached to AREA).
1158        For now the run time parameters (in data.seaice/SEAICE_PARM03) are
1159        SItrName (e.g. 'age') and SItrMate ('HEFF', which is the default, or 'AREA').
1160        Up to SItrMaxNum=3 tracers can be used simultaneously.
1161    o pkg/salt_plume:
1162      -introduce SPsalFRAC run time parameter that sets the fraction of the
1163       salt by-product of ice growth (SPsalFRAC*(1-SIsalFRAC)*salt typically)
1164       that gets vertically redistributed (fluxed down) by pkg/salt_plume.
1165    o model debug options:
1166      - Switch reading of debugMode from S/R INI_PARMS (parameter file "data", stored
1167        in PARAMS.h) to S/R EESET_PARMS (parameter file "eedata", stored in EEPARAMS.h).
1168      - Refine debug-msg printing selection (3 new levels):
1169        debugMode  : controls printing of debug messages (sequence of S/R calls).
1170        debugLevel : controls printing of algorithm-relevant auxiliary/debug messages
1171         debLevZero =  0 ; /* level of disabled aux. msg printing */
1172         debLevA =  1 ; /* level of minimum  aux. msg printing */
1173         debLevB =  2 ; /* level of low aux. print (report read-file opening)*/
1174         debLevC =  3 ; /* level of moderate debug prt (most pkgs debug msg) */
1175         debLevD =  4 ; /* level of enhanced debug prt (add DEBUG_STATS prt) */
1176         debLevE =  5 ; /* level of extensive debug printing */
1177        New debugLevel default: with default debugMode value (=F),
1178          = 2 (debLevB) or = 1 (debLevA) in case ALLOW_AUTODIFF is defined.;
1179          and if debugMode=T, default debugLevel = 4 (debLevD).
1180        Relation with previous settings:
1181         debLevB (=2) corresponds to former debLevA (=1)
1182         debLevD (=4) corresponds to former debLevB (=2)
1183        Note:
1184         a) if debugLevel=0, skip WRITE_GRID call when nIter0 > 0 (same as before);
1185         b) default debugLevel=1 is convenient in AD runs (avoid many file opening msgs);
1186            to recover previous default, set debugLevel=2 (e.g. AD-test hs94.1x64x5)
1187      - Add new parameter (printResidualFreq, read from PARM02 namelist) to print
1188        detailed CG solvers convergence; off (=0) by default, except if debugLevel=5.
1189    o pkg/obcs:
1190      - change OBCSfixTopo default from True to False (should not change the results);
1191        keep OBCSfixTopo=T in verification-exp. seaice_obcs.
1192    o pkg/thsice:
1193      - fix bug in thsice_calc_thickn.F (was introduced in version 1.18) in
1194        2nd layer seaice sublimation (unlikely to happen)
1195      - use Interior mask for OBCS in thsice_advection.F (similar to what is
1196        done in gad_advection & seaice_advection).
1197    o adjoint:
1198      bug fix spotted by Gael Forget:
1199      seaice_advection and thsice_advection still had
1200      legacy CPP options to avoid CS corner updates for adjoint
1201    o pkg/seaice:
1202      => Change some of the defaults (2011/05/29):
1203         - change SEAICEuseFluxForm default (from False to True)
1204         - change DIFF1 default (from 0.004 m/s to 0. m/s)
1205         And print warnings if DIFF1 is not set in data.seaice and centered
1206          avection scheme is used without any diffusion.
1207      also:
1208      - fix seaice_diffusion calls in default AdvScheme part of seaice_advdiff.F;
1209      - set SEAICEdiffKh[] default in the same way as SEAICEadvSch[]
1210      - stop if DIFF1<>0 with SEAICEadvScheme <> 2, if DIFF1<>0 with any
1211        other non-zero SEAICEdiffKh[] diffusivity, if SEAICEadvSalt=T with
1212        #undef SEAICE_VARIABLE_SALINITY, if SEAICEadvAge=T with #undef SEAICE_AGE.
1213      update results of test exp.:
1214         lab_sea: output.fd (switch to AdvScheme=33 with diffKh=20)
1215             output.hb87, output_adm.evp (SEAICEuseFluxForm=T and diffKh=200)
1216             output_adm.noseaicedyn (SEAICEuseFluxForm=T)
1217         offline_exf_seaice: output.seaicetd, output_adm (SEAICEuseFluxForm=T)
1218         seaice_obcs: output (SEAICEuseFluxForm=T)
1219      and prescribe old default for SEAICEuseFluxForm (=F) and DIFF1 (=0.004)
1220          for standard fwd & AD lab_sea tests (to keep the same output).
1221    o pkg/seaice/seaice_growth.F:
1222      - use Ian Fenty's capping formulas for actual ice
1223      thickness thoughout EVOLUTION branch.
1224      - put treatment pathological case #2) in CPP brackets
1225      (ALLOW_AVOID_INFINITESIMAL_AREA, undef by default).
1226      - update global_ocean.cs32x15 and 1D_ocean_ice_colum results accordingly.
1227    o pkg/seaice:
1228      - seaice_diffusion.F : remove the min(DX,DY) factor permanently;
1229      pass the Laplacian diffusivity (in m^2/s) diffKh as a parameter;
1230      also pass fac as a param, which can be 1. (to update the tendency
1231      field) or the time step (to update the field itself).
1232      - seaice_advdiff.F: for multidim, call seaice_diffusion with
1233      e.g. SEAICEdiffKhHeff and with fac=1; for single-dim, call
1234      seaice_diffusion with e.g. SEAICEdiffKhHeff and with fac=time step.
1235      - SEAICE_PARAMS.h, seaice_readparms.F, seaice_check.F :
1236      hooks to handle SEAICEdiffKhHeff, SEAICEdiffKhArea, etc.
1237    o pkg/seaice:
1238      diffusion with centered advection scheme (diffus.F & advect.F):
1239      - simplify S/R DIFFUS (put deltaT & DIFF1 factor outside, move EXCH outside)
1240        to just compute the laplacian of input-field.
1241      - unroll k loop (harmonic,biharmonic diff) in advect.F to save 1 exch call.
1242      - fix flux-form version in diffus.F to conserve tracer.
1243      update output of lab_sea.fd & lab_sea.hb87 (1rst set of modif affects
1244       machine truncation) and lab_sea.salt_plume (conservative flux-form modif)
1245    
1246    checkpoint62y (2011/05/26)
1247    o pkg/seaice:
1248     - seaice_growth.F : in EVOLUTION branch, always include
1249       a_QSWbyATM_cover in qnet (as it should be).
1250     - verification/global_ocean.cs32x15 : update results accordingly
1251       (output.seaice.txt output_adm.seaice.txt).
1252    o pkg/seaice + obcs:
1253     - use maskInW & maskInS in multi-dim advection and biharmonic diffusion:
1254       equivalent of assuming no tracer gradient outside the OB region.
1255       update output of seaice_obcs (uses DIFF1 <>0 => biharmonic diffusion)
1256     - remove calls to OBCS_COPY_TRACER after EXCH calls (no longer needed
1257       after changes above);
1258     - obcs+seaice cleaning: apply seaice-tracer OB values to tracer field
1259       only at OB location (instead of over a band of OLx width).
1260    o pkg/seaice:
1261     - fix wrong indices in old (non Flux-Form) diffusion default S/R diffus.F
1262       (dxG(I+1, ...) changed to dxG(I, ...), no impact on Lat-Lon grid)
1263    o pkg/obcs:
1264      - split header file "OBCS.h" into 4 separated files:
1265        OBCS_PARAMS.h, OBCS_GRID.h, OBCS_FIELDS.h & OBCS_SEAICE.h
1266       Note: OBCS_PARAMS.h & OBCS_GRID.h can be included without OBCS_OPTIONS.h
1267         (contain no conditional statement which depends on OBCS options).
1268      - move "useOBCSYearlyFields" from "data.obcs" (hold in OBCS_PARAMS.h)
1269        to parameter file "data.exf", namelist EXF_NML_OBCS (in EXF_PARAM.h).
1270    o ctrl, cost, grdchk & autodiff pkgs:
1271      - make options file more standard (like other {PKG}_OPTIONS.h file but
1272        with AD_CONFIG.h); clean-up some of the included header files.
1273    o pkg/obcs:
1274      - do not mask tracer when applying OB (tracer == 0 could generate problems)
1275      - apply tracer OB values to tracer field only at OB location (instead of
1276        over a band of OLx width)
1277      - clean-up obcs_apply_w.F & obcs_apply_eta.F (since less calls to these S/R)
1278      - remove OBCS_MULTIDIM_OLD_VERSION code in gad_advection.F and remove
1279        obcs_apply_tloc.F & obcs_apply_sloc.F
1280    o obcs in model/src:
1281      - call OBCS_APPLY_W only if NonHydrostatic.
1282      - call OBCS_APPLY_ETA only if NonLinFreeSurf.
1283      - reset dEtaHdt and wVel to zero outside OB interior region ;
1284      - leave tracer unchanged outside OB interior region: This has no effect
1285        on the solution but just to prevent unrealistic tracer value outside OB.
1286      - zero out velocity outside OB interior region: This has no effect on
1287        the solution but just to prevent unrealistic velocity outside OB.
1288    o obcs and non-lin free-surf:
1289       move call to OBCS_APPLY_R_STAR from update_r_star.F to calc_r_star.F
1290       and call to OBCS_APPLY_SURF_DR from update_surf_dr.F to calc_surf_dr.F
1291       + add argument "etaFld" to OBCS_APPLY_R_STAR & OBCS_APPLY_SURF_DR:
1292       this fixes missing EXCH + get consistent eta OB value (+ fix restart).
1293       update results of test-exp. exp4(nlfs).
1294    o exp4 (nlfs) test-exp:
1295       use OBC for Eta at Western & Eastern OB (to test prescribing Eta
1296       with NonLin-FreeSurf); update output.nlfs.txt
1297    o obcs and 2d/3d solver norm:
1298       use interior masks (maskInC) to cancel out cg2d & cg3d matrix coeff at OB
1299       and outside OB interior region (will allow to place OB further inside the
1300       domain). Depending on the domain, can affects cg2d-Norm (previous
1301       cancellation outside OB was only partial), e.g. in exp4 & obcs_ctrl,
1302       and cg3d-Norm (previous Norm was computed before canceling OB terms),
1303       e.g. in tutorial_plume_on_slope.
1304      - update output of exp.: exp4 (x2), obcs_ctrl and tutorial_plume_on_slope.
1305    o pkg rbcs:
1306      - split RBCS.h into 3 files: RBCS_SIZE.h, RBCS_PARAMS.h & RBCS_FIELDS.h
1307      - add capability to apply relaxation to horizontal velocity uVel & vVel.
1308    o pkg/grdchk: add gradient check for control variable xx_shifwflx
1309    o pkg/shelfice/shelfice_init_fixed.F
1310      fix CPP-flag combinations
1311    o pkg/seaice: Merge iceage code of Pierre Rampal
1312      * update/change/correct ice age calculations
1313      * add age updates for pathological cases
1314      Probably needs more testing...
1315    
1316    checkpoint62x (2011/05/13)
1317    o pkg/mom_vecinv:
1318       high-order vorticity scheme: use interior masks (maskInW & S)
1319       to zero-out (outside OB) gradient of vorticity.
1320    o verification exp.:
1321       turn on "useEnergyConservingCoriolis" (better discretisation) in exp.
1322       hs94.128x64x5 and seaice_obcs ; update results.
1323    o pkg/obcs:
1324      fix bug in OBeta for YZ sections in obcs_exf_load.F
1325    o pkg/ctrl, pkg/shelfice, and optim:
1326      - add new control variable xx_shifwflx (fresh water flux underneath ice
1327        shelves). This is almost as tedious as obcs-ctrl, because the
1328        variables needs its own mask.
1329      - add a cost function term that penalizes the deviation of xx_shifwflx
1330        from the first guess (zero) in analogy to other control variables
1331    o pkg/shelfice:
1332      - start basic adjoint
1333    o pkg/ctrl:
1334      - remove extra 2D field "for good measure" when initializing in
1335        ctrl_set_globfld_[xy/xz/yz].F
1336      - replace hard coded precision 32 (a bug) in ctrl_map_ini_gen by ctrlprec
1337      - improve error messages in ctrl_set_unpack_*
1338    o OBC implementation in momentum:
1339       use interior masks (maskInC,W & S) in momentum S/R:
1340       - multiply divergence, tension and some del^i.u or del^j.v by maskInC
1341       - multiply del2u,del2v by maskInW/S (biharmonic viscosity)
1342       - multiply horiz. grad of vorticity by maskInW/S (in Leith scheme)
1343       - multiply gradient of wVel by maskInW/S in del2w calculation (NonHyd)
1344       Motivation: fix/clean implementation of OBC with biharmonic-viscosity
1345        (and also with Leith/Smagorinsky harmonic-viscosity).
1346       Update output of experiment dome and exp4 (+nlfs).
1347    o exp4 test-exp:
1348      - turn on: nonHydrostatic, exactConserv, viscA4 (with momDissip_In_AB=F)
1349        and prescribe time-varying OB (without pkg/exf) for zonal-velocity
1350        at Western & Eastern Boundaries (+/- 1 per-cent); Also prescribe
1351        time-varying OB at Western-side for wVel (NonHyd); update output.
1352      - add secondary set-up (.nlfs) using NonLin FreeSurf (z*) + mom_vecinv
1353        and biharmonic-viscosity ; also use prescribed time varying OB.
1354    o pkg/obcs:
1355      fix bug in OBWeta,OBWeta indices in obcs_apply_r_star.F
1356    o model/src:
1357      - fix startTime setting when baseTime<>0 & nIter0=0 are specified ;
1358      - initialise startTime & nIter0 with unlikely values: allows to set one
1359        from the other without ambiguity.
1360    o seaice_obcs test-exp.:
1361      add small diffK4T,S to test biharmonic diffusivity with OBCS ; update output.
1362    o pkg/obcs:
1363      - remove calls to OBCS_COPY_TRACER after EXCH for T,S & pTracer:
1364        no longer needed with maskInC,W,S in pkg/generic_advdiff.
1365    o pkg/seaice:
1366      - retired SEAICE_SALINITY and SEAICE_salinity in favor of
1367        SEAICE_VARIABLE_SALINITY and SIsalFRAC, respectively.
1368      - fixed bug in the initialization of sea ice salinity variable HSALT
1369        in seaice_init_varia.F  (removed dependence on ICE2WATR)
1370    o fizhi-cs test exp.:
1371       switch reference output convention for these 2 non-standard test-exp,
1372        from: pgi  6.1-5 on faulks (FC.6, -of linux_ia32_pgf77+authors_fc5)
1373          to: ifort 11.1 on baudelaire (FC.13, -of linux_amd64_ifort11)
1374       reason: faulks might get retired soon and pkg/fizhi has still Pb with gfortran
1375    o model/inc:
1376      - change type of PmEpR array (from _RS to _RL) to fix restart (with "-use_r4")
1377        of exp. global_ocean.90x40x15 (Suncronous time-stepping + Real-FW + NonLin-FS)
1378    o pkg/seaice:
1379      - fix calculation of saltFlux and saltPlumeFlux when using SEAICE_SALINITY
1380    o verification/lab_sea, 1D_ocean_ice_column, seaice_obcs, global_ocean.cs32x15
1381      - updated output*.txt files due to bug fixes in salt, saltPlumeFlux,
1382        and initial HSALT
1383    
1384    checkpoint62w (2011/04/26)
1385    o pkg/mom_fluxform:
1386      - fix calculation of del2u & del2v (no-slip BC) when using Non-Lin Free-Surf.
1387      - use parameter "sideDragFactor" in no-slip BC side-drag part.
1388      - update output of exp. global_ocean.90x40x15
1389    o pkg/mom_vecinv:
1390      mask del2u & del2v (no effect on results, but cleaner & closer to mom_fluxform)
1391    o update seaice exp.:
1392      use more consistent parameter values (remove "backward compatability only":
1393       ICE2WATR, SEAICE_lhSublim, SEAICE_cpAir, SEAICE_rhoAir + set rhoConstFresh)
1394      related to thermodynamics seaice. Update output (fwd+AD) of exp.:
1395       1D_ocean_ice_column (x2), lab_sea (x8), ioffline_exf_seaice (x2) & seaice_obcs
1396    o update test-exp global_ocean.90x40x15:
1397      o use default CD_CODE_OPTIONS file (Adams-Bashforth on CD Mom & Coriolis).
1398      o increase Overlap size from 2 to 3 (to allow to test bi-harmonic Visc.)
1399      o new pickup-files from a 100.yr run with pkg/down_slope (input.dwnslp params)
1400      o turn on zStar & viscA4 in standard set-up (dir input/)
1401        and update output files: output.txt & output.dwnslp.txt
1402    o new AD-test experiment: obcs_ctrl
1403      (From Matt MITgcm_Contrib/SOSE/BoxAdj) to test OBCS as control vector.
1404    o pkg/dic:
1405      fix two bugs in handling water vapour pressure in carbonate chemistry
1406      and air-sea fluxes. Found by Val Bennington and Galen McKinley
1407      (add DIC Option = WATERVAP_BUG to recover old results)
1408      update output of tutorial_global_oce_biogeo (fwd+AD) & tutorial_dic_adjoffline
1409    o adding allowInteriorFreezing option to check for water below freezing point
1410      at depth and bring the negative heat anomaly to the surface level
1411    o pkgs _fields_load:
1412      - extend GET_PERIODIC_INTERVAL to deal with non-periodic case (from pkg/rbcs)
1413      - use new S/R GET_PERIODIC_INTERVAL in pkgs:
1414        bulk_force, cheapaml, cfc, dic, obcs (+ ctrl/ctrl_get_gen_rec), offline and
1415        rbcs to get interpolation weights and time reccord number.
1416      - fix multi-threading in aim_fields_load.F
1417      - apply EXCH to temp arrays [0,1] after reading in dic_fields_load.F
1418  o external_fields_load:  o external_fields_load:
1419    new S/R GET_PERIODIC_INTERVAL to calculate which time-record (and linear    new S/R GET_PERIODIC_INTERVAL to calculate which time-record (and linear
1420     interpolation weights) to use in a periodic time-series ; do not divide by     interpolation weights) to use in a periodic time-series ; do not divide by

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