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revision 1.1335 by jmc, Tue Nov 16 17:53:33 2010 UTC revision 1.1672 by gforget, Fri Jun 22 02:07:35 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/profiles : refine profiles and files handling.
8    o model/src and pkg/ecco : introduce run-time switch usePROFILES.
9    o model/src/the_main_loop.F, forward_step.F and pkg/exf/EXF_OPTIONS.h :
10      - changes to use model/src/the_main_loop.F rather than the ecco version
11        in ecco type adjoint runs.
12    o model/src:
13      - fix S/R UPDATE_CG2D for ALLOW_DEPTH_CONTROL case (was empty before);
14        update output of test experiment bottom_ctrl_5x5.
15    o pkg/generic_advdiff:
16      - implement vertical bi-harmonic diffusion (for now, only for T & S and
17        only explicitly).
18    o verification/bottom_ctrl_5x5/
19      update reference output (results changed quite some time ago,
20      not sure when; but new reference results look ok in terms of grdchk)
21    o verification/1D_ocean_ice_column/
22      For verification purposes, the exact adjoint rather than an approx.
23      should be used (e.g., to comare against F.D. or TLM).
24      removed autodiff_inadmode*_ad.F routines in code_ad/
25      Update results/ accordingly.
26    o pkg/cal:
27      - change cal_getdate.F so that output date is function of input time only
28        (less ambiguous, not mixed up with input iteration number).
29      - fix calendarDumps for non-zero phase-lag (S/R CAL_TIME2DUMP).
30    o pkg/diagnostics:
31      - implement calendarDumps also for stats-diags
32      - implement calendarDumps also for snap-shot output (negative freq)
33      - for now, ignores calendarDumps if non-zero phase-lag.
34    
35    checkpoint63n (2012/06/04)
36    o model/src:
37      - recompute rSurfW & S to ensure consistent column thickness (needed for rStar)
38        between Sum_k(hFac*drF) and rSurf-rLow, for now only when using pkg/shelfice;
39      - use h0FacC, W & S to compute hFac_surfC, W & S in calc_surf_dr.F (more
40        similar to calc_r_star.F); update results of experiment internal_wave and
41        tutorial_global_oce_in_p (affected @ truncation level).
42    o pkg/shelfice:
43      - add parameterisation of advective-diffusive flux into the ice shelf
44        according to Holland and Jenkins (1999), eq.22-33, as suggested by Jan De Ryd
45      - simply eps3/3a computation
46    o eesupp:
47     - add new CPP option (DISCONNECTED_TILES) to disconnect tiles (no exchange
48       between tiles, just fill-in edges assuming locally periodic subdomain) and
49       add corresponding exchange subroutines (EXCH0);
50     - new CG-solver version (_EX0) for disconnected-tiles special case.
51    o model/src (CG-solvers):
52     - modify Single-Reduction version (CG2D_SR) in case cg2dMaxIters is reached
53       (similar final residual output and max-Iter number as with standard version);
54     - allows to store and use lowest-residual solution (standard & _SR versions);
55     - cleaning up (remove old, commented out code, LETS_MAKE_JAM ...).
56     - by default, also compile CG2D_SR version (define ALLOW_SRCG in CPP_OPTIONS.h)
57    o eesup/src:
58     - global_vec_sum.F cleaning: add a BARRIER ; update comments ; remove ndef
59       ALWAYS_USE_MPI (no longer needed after fixing usingMPI settings - March 2012)
60    o pkg/salt_plume added to lab_sea/input_ad.noseaicedyn
61    
62    checkpoint63m (2012/04/27)
63    o pkg/shelfice:
64     - account for partical cells in surface level below ice-shelf for hydrostatic
65       pressure calculion (set uniformFreeSurfLev to F); update isomip experiments.
66    o ad test experiments:
67     - update and rename to "ad_optfile.local" local AD-optfile specific to a
68       particular adjoint verification experiment (in verification/*/code_ad/)
69    o pkg/seaice & pkg/exf:
70     - Part two of ECCO-CLIVAR code merges.
71       Completes merge of seaice area relax. code.
72       Requires unified CPP option EXF_ALLOW_SEAICE_RELAX
73       to be set in EXF_OPTIONS.h since this pkg controls its I/O
74       (and avoids second CPP option in SEAICE_OPTIONS.h)
75     - change default value of costIceStart & costIceEnd to a valid date.
76     - add snowPrecip to HSNOW in seaice_growth
77    o pkg/ptracers:
78     - move ptracers summary and setup check into separated S/R ; add a check for
79       valid PTRACERS_Iter0 value (error+stop or just warning).
80    o pkg/cal (+ pkg/ecco):
81     - avoid calling a S/R with 2 times the same arg (FWD: unless both are only used
82       as input; and for AD, unless both are not differentiable (e.g., k index)).
83    o model/src:
84     - define internal flag "uniformFreeSurfLev" (=T when free-surface level-index
85       is everywhere k=1) to speed-up some calculations (by pass kSurf reference);
86       temporary set to usingZCoords value (to be changed to F when using shelfice).
87     - hydrostatic pressure: implement partial cell near the surface also for
88       Z-coordinates (for the case where uniformFreeSurfLev=F); replace test on
89       usingZCoords with test on uniformFreeSurfLev where needed (in NonHyd code).
90    o pkg/ctrl/ctrl_init.F:
91     - add a formal parameter to s/r ctrl_init_rec to print
92       xx_$(ctrl_valiable)_file for easier debugging
93     - move call of cal_* routines into the if-block where they are really
94       needed so that xx_$(ctrl_variable)_period can be 0 or -12 without having
95       to specify a startdate
96    o pkg/seaice:
97     - update comments in SEAICE_OPTIONS.h (+ similar update of lab_sea/code and
98       global_ocean.cs32x15/code versions).
99     - turn on seaice Multi-category (in data.seaice, SEAICE_multDim=7) for
100       verification experiment global_ocean.cs32x15.seaice and update results.
101    o pkg/exf:
102     - new S/R EXF_GETFIELD_START to return starting-time of a forcing field
103       (according to useExfYearlyFields).
104    o pkg/cal:
105     - move calendar setting & summary (previously in cal_readparams.F) into new
106       S/R CAL_INIT_FIXED to be called later in the initialisation process, once
107       length of the simulation is set (after SET_PARMS call); This is an attempt
108       to fix Pb when, e.g.: pkg/longstep, modifies the length of the run.
109     - For safety: keep a record of pkg/cal parameter settings status
110               to allow to STOP if one pkg/cal S/R is called too early.
111     - add a stop in all basic pkg/cal subroutines if called before setting is done.
112     - modify cal_getdate.F: stop when nothing was returned;
113       if called with myIter=-1, simply retrun modelBaseDate (1,2 = startDate_1,_2);
114       this allows to remove "cal.h" from seaice_read_parms.F & init_mnc_vars.F.
115    
116    checkpoint63l (2012/04/04)
117    o pkg/bbl:
118      - fix call to FIND_RHO_2D in bbl_calc_rho.F (case multi-tiles per proc);
119        update global_with_exf output.yearly.txt file.
120    o pkg/cal:
121      - start to clean-up cal_set.F ; fix for the case where baseTime is non-zero.
122      - remove 2 unsused and very short (1 line only) functions ;
123      - remove unsused subroutines from AD-Diff list.
124    o model/src:
125      - start to implement clean wait to stop in initialization S/R (config_check.F,
126         packages_check.F, ini_parms.F and pkg/obcs/obcs_check.F + pkg/mypackage)
127    o folowing PRINT_MESSAGE changes:
128      - remove reminder multiple print to the same file (STDOUT) when multi-threads.
129    o pkg/bbl:
130      - modification so it can work with z*
131      - replace deltaT with dTtracerLev(k) for asynchronous time stepping
132      - global_with_exf/input.yearly verification; changes output.yearly.txt
133    o eesupp/src:
134      - PRINT_MESSAGE: use OpenMP critical instruction (similar to PRINT_ERROR);
135        writing to unit 0 (if unit=errorMessageUnit) extended to the case myThid=1
136      - CHECK_THREADS: specific code if using OpenMP threading: improve checking of
137        # of threads across processors (e.g., different env OMP_NUM_THREADS setting)
138      - improve special preliminary call to EESET_PARMS (if eedata is read 2 times).
139      - when using MPI, always set usingMPI=T ; set default accordingly and stop
140        if not consistent.
141      - ALL_PROC_DIE: add a BARRIER after MPI_FINALIZE call ; skip this when thread
142        argument is zero (in case called within single-thread section).
143    o pkg/fizhi:
144        clean-up turbulence cold-start switch: decided in fizhi_init_vars.F, stored
145        in common bloc (fizhi_coms.h) and then passed as argument up to S/R TURBIO.
146    o pkg/exch2:
147      - add argument "updateCorners" to S/R exch2_get_uv_bounds (enable to
148        activate EXCH_IGNORE_CORNERS in vector EXCH S/R).
149      - switch 1rst EXCH call to IGNORE_CORNERS (instead of UPDATE_CORNERS)
150        but keep the 2nd with UPDATE_CORNERS: this prevents overwriting good data
151        with bad ones coming from a not-yet-updated halo.
152        This should fix the problem when sNx <> sNy and GCD(sNx,sNy) < 2*Olx.
153    o pkg/frazil:
154        move FrzForcT diag from frazil_diagnostics_state.F to frazil_calc_rhs.F
155        http://mitgcm.org/pipermail/mitgcm-devel/2012-March/005384.html
156    o model/src/config_check.F: add a check for OLx>sNx/OLy>sNy
157    o verification/lab_sea
158      * #undef SEAICE_EXCLUDE_FOR_EXACT_AD_TESTING
159      * #define ALLOW_SST_CONTROL & ALLOW_SST_CONTROL
160      * nTimeSteps 3 -> 4
161      * changed reference output accordingly
162    o pkg/ctrl:
163      * fix ctrl_get_gen for xx_sst, xx_sss
164    o pkg/fizhi:
165      - fix 2 calls to S/R GRD2MSC (argument igrd) in update_earth_exports.F
166        update results of exp. fizhi-cs-32x32x40 (fail with only 6 digits for cg2d)
167      - by default, use new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE);
168        fix few out-of-bounds indices in referencing vars (initialise igrd to 1);
169        clean-up fizhi_turb.F (remove unused & uninitialised qdiaglsm array).
170    o pkg/gmredi:
171      - add diagnostic of Redi (main diagnonal) vertical diffusive flux of Temp
172    o pkg/fizhi:
173      - fix few initialisation and multi-tile Pb: aqualev & gridalt now pass the
174        (old)aces open64 tuv test.
175    o pkg/icefront: fix bug and reorder loop in icefront_init_varia.F
176    o pkg/mom_vecinv:
177      - fix 1 loop range in mom_vecinv.F to be like all the other loops which
178        set/update gu,gv/Diss (fix Pb of uninitialised fVerUkp in admom_vecinv
179        with non-lin free-surf).
180    o model/src: move k-loop outside of i/j-loops when (re-)computing R_low
181      in ini/update_masks_etc.F in order to avoid -O3 optimization problems with
182      some compilers (gfortran 4.6.0 on MacOS)
183    o momentum:
184      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
185        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
186        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
187    
188    checkpoint63k (2012/03/17)
189    o model/src:
190       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
191         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
192       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
193         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
194    o model/src: solve_*diagonal.F
195       - replace division with multiplication by inverse (similar to original version)
196         update output of AD exp. global_ocean.90x40x15.
197       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
198         to enable the use of the vectorized & differentiable solve_tridiagonal.F
199       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
200         vertical advection (to get solve_tridiagonal tested in AD mode).
201    o pkg/seaice: ECCO-CLIVAR merge:
202      1. seaice AREA relaxation
203         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
204         * runtime flag: SEAICE_tauAreaObsRelax
205      2. modified global mean cost imbalance code: CPP option
206          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
207    o another iteration on solve_*diagonal.F
208       Make choices independent of AUTODIFF
209       Default will be the adjoinable vectorized version.
210       Alternative choices are:
211       * non-adjoinable original version with low memory footprint:
212         #define SOLVE_DIAGONAL_LOWMEMORY
213       * still adjoinable but does not vectorize (k as inner-most loop):
214         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
215    o testreport
216     - add option to use a home made wrapper around "make"
217     - remove MITGCM_IEEE env. variable (no longer active)
218    o pkg/shelfice
219     - improve computation of friction velocity for velocity dependent
220       exchange coefficients: include velocities into SHELFICEBoundaryLayer
221       block to average velocities vertically
222     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
223    o Modify diagonal solvers, now three versions (upon request):
224      #ifndef SOLVE_DIAGONAL_AUTODIFF
225        1. default version (dating back a while ago)
226      #else /* def SOLVE_DIAGONAL_AUTODIFF */
227      # ifdef SOLVE_DIAGONAL_KINNER
228        2. adjoinable version with k-innermost loop (G. Forget)
229      # else
230        3. adjoinable vectorized version of 2.
231      # endif
232      #endif /* SOLVE_DIAGONAL_AUTODIFF */
233      All flags are currently set within routines, but could/should be moved to CPP-options.
234      Array bounds for 1. are as before, for 2.,3. cover the entire domain
235      (could be changed for 1. too).
236    o verification/lab_sea (fwd):
237      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
238        use 7 categories (except hb87), new solve4temp params (except salt_plume),
239        constant salinity (=4) or variable salinity (salt_plume) done through
240        SItracer.
241    o pkg/seaice:
242      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
243      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
244         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
245        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
246        SEAICE_freeze got retired) but already better than previously with
247        SEAICE_freeze=123456.7 deg.C;
248      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
249        (safer multi-threaded setting); always set SEAICEuseEVP;
250      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
251        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
252        stop if multiple specifications for the same coeff; make sure default
253        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
254    o pkg/obcs:
255      - allow to switch to upwind 1rst order advection scheme for the advective
256        flux computation at the open-boundary; disabled for adjoint built.
257    o pkg/ptracers:
258      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
259      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
260      - add parameter to decide when to start a tracer; use internal flag to
261        know which tracer to step-forward; switch this internal flag at the top
262        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
263        for adjoint built.
264    o pkg/seaice:
265      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
266      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
267      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
268    o pkg/ecco:
269      - fix writing of output file DiagnosCost_ClimSalt/Theta
270        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
271    o pkg/seaice:
272      - add missing initialisation of COR_ICE array in dynsolver.F
273      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
274        compiled either way, and is tested in all exps (multidim was only tested
275        in lab_sea ad before).
276      - cosmetic change to prepare for future addition of ITD. no change to results.
277        no defaults change.
278      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
279      - by lack of adequate verification experiments, I further used custom versions
280        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
281        should be correct.
282      - avoid recomputations in ad.
283    o array initialisation in adjoint mode:
284      1) pkg/mom_common/mom_calc_ke.F:
285        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
286        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
287        part this initialisation is gone, resulting in Floating Point Exception
288        (caught by open64 compiler with debug option).
289      2) model/src/convective_weights.F
290        set output convectCount over the full array range (instead of doing
291        an update): this fix a similar issue when called within recomputation (adjoint)
292        which could by-pass the initialisation (normally done in the caller S/R).
293    o pkg/seaice:
294      - final version of turbulent flux params, as agreed at MIT ice meet:
295           SEAICE_mcPheePiston (default is ~ 0.000875)
296           SEAICE_mcPheeTaper (default is 0.)
297           SEAICE_frazilFrac (defualt is 1.)
298           SEAICE_mcPheeStepFunc (default is false)
299      - changes results at trunction error level
300      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
301    o added pkg/frazil:
302      - see frazil_description.tex for details
303      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
304    o pkg/shelfice/shelfice_thermodynamics.F
305      - fix exponents for velocity dependent exchange coefficients: change
306        from 2/3(=0) to 0.66666666666666667
307      - move computation of velocity dependent exchange coefficients into
308        separate loop, so that it applies to both thermodynamics
309      - move some divisions by constants out of loops
310    
311    checkpoint63j (2012/02/16)
312    o pkg/seaice:
313      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
314      - SItracer:  added run time params, and allow coupling to ocn salinity.
315    o pkg/seaice: remove (almost) all divisions by constants within loops
316      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
317      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
318      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
319      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
320    o pkg/seaice :
321      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
322        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
323      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
324      - add permanent SItflux diag that corresponds to TFLUX but includes
325        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
326      - allow activation/testing of a fix for suspected missing term in
327        ocn-ice heat budget (to be confirmed). To test this, you want to
328        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
329        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
330      - no change in results, fwd or ad.
331    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
332      - switch to variable freezing point.
333           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
334      - bug fix : the sublimation term that was missing is now activated.
335           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
336      - bug fix : flooding sign term for SIsal0.NE.0.
337           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
338    o pkg/seaice:
339      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
340        is now the default, and the old default constant freezing point is recovered
341        with SEAICE_tempFrz0    = -1.96,
342             SEAICE_dTempFrz_dS = 0.,
343      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
344      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
345      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
346        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
347      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
348        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
349      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
350        seaice_growth r149 for legacy branch (no results change).
351      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
352        from I. Fenty).
353      - results did not change except for global_ocean.cs32x15, mostly due to the
354        switch to variable freezing point (see above item for detail).
355    o pkg/thsice:
356      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
357        seawater freezing in thsice_calc_thickn (not used).
358    o pkg/seaice: turbulent flux term specification via run time params.
359      - replace CPP switches with run time switches to facilitate testing
360      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
361                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
362      - added runtime parameter : SEAICEturbFluxFormula
363      - move Mcphee constants to SEAICE_PARAMS.h
364      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
365                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
366                 remove seaice_summary call (moved to seaice_init_fixed)
367      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
368        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
369      - seaice_summary.F : add missing report of read turbulent flux term set up
370                           and SITRACER.
371      - seaice_check.F : check range; inform and stop if retired CPPs are used
372                         (incl. SEAICE_AGE).
373      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
374             CPP switch, same computation as before for the different options.
375      - change results at the truncation level.
376    o pkg/seaice:
377      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
378        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
379        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
380      - update verification/*/input*/data.seaice:
381        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
382        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
383        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
384        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
385    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
386      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
387        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
388        difference in results only due to machine truncation.
389      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
390        MaykutPolySatVap; keep MIN_LWDOWN.
391      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
392      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
393        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
394    o pkg/salt_plume:
395      - isolate saltPlumeFlux array exch into a specific S/R called from
396        do_oceanic_phys.F
397      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
398    o verification:
399      - move untested set-up to MITgcm_contrib/verification_other.
400    o pkg/seaice:
401      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
402    o pkg/seaice:
403      - seaice_solve4temp.F (keeping results unchanged):
404        * add 2 future run-time params to select which saturation vapor pressure
405          formula is used and how post-iteration fluxes are set.
406          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
407        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
408          the linearized expression to stay consistent with tsurf finding.
409      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
410        can be < 0.
411    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
412      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
413        conductive heat flux F_c , and add it explicitly when updating tsurf as
414        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
415        so that now F_ia has a consistent meaning through the entire routine.
416        This causes differences at truncation level: update output of fwd exp.
417        global_ocean.cs32x15.seaice.
418    o pkg/seaice:
419      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
420        of arrays, sign/direction of fluxes; no effect on results.
421      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
422        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
423        note: this should have been done before changing celsius2K default.
424      - to keep results unchanged, add back old value of celsius2K in verification
425        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
426      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
427        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
428        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
429        freezing temp is consistent with value in seaice_growth.F ; this causes
430        differences at machine truncation level: update lab_sea AD output (3/4).
431    o pkg/seaice:
432      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
433        and climsst/sss even when using seaice (to prevent calculation that might
434        use SST on land); does not affect any verification exp.
435      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
436        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
437    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
438      over land (non-legacy code)
439    o vectorize salt_plume package:
440      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
441      - this code computes plumebk everywhere (also over land), thus requires
442        code to avoid divisions by zero and catch the case of kLev=Nr.
443      - efficiency of salt_plume_frac is still sub-optimal
444    o tools (genmake2):
445      - fix makefile NAME specification (option: -makefile NAME) by adding
446        "-f $MAKEFILE" in few places where it was missing including makedepend
447        command (contribution from Paul).
448    
449    checkpoint63i (2012/01/24)
450    o model/src:
451      - add factorized versions of some EOS code to find_rho.F,
452        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
453    o model/src:
454      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
455      - change default celsius2K from 273.16 to 273.15
456      - to keep results unchanged, add back old value of celsius2K in verification
457        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
458         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
459    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
460      to make TAF generate vectorizable code
461    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
462       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
463       have flags that do this more efficiently.
464    o pkg/diagnostics/diagstats_calc.F
465      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
466    o pkg/obcs (with exch2):
467      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
468        and remove code (in obcs_readparms.F) which was based on EXCH of indices
469        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
470    o pkg/exf and seaice exp:
471      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
472        so that switching off area & heff advection flags does not affect results.
473      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
474      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
475        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
476        results of verification experiments: 1D_ocean_ice_column(fwd),
477        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
478        and offline_exf_seaice (all 4).
479    o pkg/seaice:
480      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
481        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
482      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
483        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
484        not multi-dim advection;
485      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
486        SHORTWAVE_HEATING #undef.
487    o optim: make Makefile more robust (?)
488    o pkg/obcs:
489      * fix treatment of obcs_read_pickup for TAF
490    o pkg/shelfice:
491      * add missing initialisation of num_shifwflx
492      * new adjoint verification exp. for isomip
493      * change Prandtl and Schmidt numbers from generic formulations
494        (in terms of model diffus. and visc.) to separate runtime
495        parameters, with Holland and Jenkins (1999) default values.
496    o pkg/exf (interpolation):
497      - extended input field (2 rows) near the N & S poles:
498        * fill in with the symetric value (when even Nb of data in longitude)
499        * add average value at the poles only for scalar quantities ; for vector
500          component interpolation, skip the averaging and keep duplicated values,
501          unless the 2 components have same location (uvInterp=T) in which case
502          interpolate the 2 components together using S/R EXF_INTERP_UV.
503      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
504        together: this allows to account properly for local orientation when
505        averaging at N & S pole.
506      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
507        exf-interpolation near N & S poles. Undef by default.
508      - add debug check/print on 1rst iter if debugLevel >=2.
509    o pkg/exf:
510      - change masking flags definition (no longer "parameter"), put them in
511        common block and set them in S/R EXF_INIT_FIXED.
512      - change recognized masking flag from s,u,v to c,w,s since the mask
513        to use (maskC,W,S) depends on position on model grid and has little to
514        do with scalar/vector difference; fix masking if using P-coordinates.
515      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
516        and update results of exp. global_with_exf (x2).
517      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
518    o pkg/obcs
519      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
520    o pkg/exf (interpolation):
521      - assume periodicity in X only if input field cover full longitude range.
522      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
523        and should vectorise).
524      - fix input lat of the 2 added row (in case we provide N.pole data).
525    
526    checkpoint63h (2011/12/30)
527    o pkg/seaice:
528      - change declaration of UVM from _RL to _RS in order to get B-grid
529        uIce,vIce monitor when _RS = real*4
530    o pkg/offline:
531      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
532      - compute vertical velocity if not read from file (switch on exactConserv
533        & staggerTimeStep);
534      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
535    o verification:
536      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
537        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
538        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
539      - update output of exp. global_ocean.cs32x15.viscA4 after changing
540        grid-file angles (used here for coriolis-3d);
541      - remove (or gzip) few files not needed to run fizhi-cs experiments.
542    o pkg/exf (vector interpolation):
543      - rotate vector component toward local grid-axis orientation using grid-angles
544        (stored in GRID.h) instead of locally computed rotation angle; keep old code
545        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
546    o pkg/seaice:
547      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
548        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
549    o pkg/PKG_OPTIONS.h files:
550      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
551        outside of the #ifdef ALLOW_THISPKG / #endif block.
552      - update verification/*/code/PKG_OPTIONS.h files.
553    o add a verification experiment (offline_exf_seaice/input.seaice) that test
554      the B-grid LSOR solver
555    o pkg/seaice: sort out emissivity and long wave radiation step 2:
556      - add emissivity for snow and ice as new run-time parameters
557        (unfortunately) that default to the corresponding exf values; this
558        changes results in most verification experiments so that for backward
559        compatibility these parameter have to be set explicitly to inconsistent
560        values (ugly);
561      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
562        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
563        until we agree how to handle this bug properly
564    o pkg/exf (interpolation):
565      - add a set of run-time param ({inputfield}_interpMethod), one for
566        each interpolated input field, to select the interpolation method
567        with a value of zero switching off the interpolation;
568      - print interpolation parameters to standard output;
569      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
570        (to use instead runoff_interpMethod=0 in data.exf).
571      - simplify default setting of interpolation parameters (for all fields,
572        set position to match model grid cell-center position, leading to trivial
573        interpolation in case of regular Lat-Lon grid) and fix for the case of
574        non-uniform delY.
575    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
576       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
577       this factor is absolutely required, because the lw exitance (= out-going
578       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
579       where the reflectivity rho = 1-emissivity for conservation reasons. Once
580       this is established, we can remove the CPP-Flag (if we want to).
581    o pkg/seaice:
582      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
583        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
584      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
585        what the name implies (and not emissivity*BoltzmannConstant), this means
586        the old default value of 5.5e-8 now means
587        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
588        S/R exf_readparms
589      - FV-discretization of the B-grid LSOR solver, turn on with
590        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
591        of the calling routine dynsolver, so that B and C-grid code look a
592        little more alike.
593      - fix index bugs in ostres.F (B-grid code)
594    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
595    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
596      default for SEAICE_emissivity, if useEXF; requires setting a wrong
597      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
598      backward compatiblity
599    o model/src: use sigmaR in calc_ivdc
600    
601    checkpoint63g (2011/12/16)
602    o pkg/seaice/seaice_growth.F:
603      fix heat conservation of the coupled ocean-seaice system.
604      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
605      solid vs liquid water treatment is resolved via QNET.
606    o pkg/seaice/seaice_growth.F:
607      add missing term for sublimation in saltFlux, which was breaking conservation.
608    o pkg/seaice/seaice_model.F:
609      Remove this patholigical case treatment in evolution branch,
610      where it is un-necessary and breaks conservation.
611      Update global_ocean.cs32x15/results accordingly for
612      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
613    o model/src:
614      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
615      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
616    o pkg/obcs:
617      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
618      tendency for temperature and salinity that is then applied to update
619      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
620      horizontal advection and diffusion contributions on the boundary (in
621      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
622      removing the mask in S/R timestep_tracer. The advantage of this approach is
623      that the updated tracer values include contributions from the surface
624      forcing and vertical diffusion.
625      This modification changes exp4.stevens because of vertical diffusion.
626    o model/src:
627      change non-curvilinear grid setting to also work with exch2 + blank tiles:
628      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
629        face dimensions.
630      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
631        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
632        and INI_SPHERICAL_POLAR_GRID.
633      change test-experiment global_ocean.90x40x15:
634      - split the domain in many more tiles (9x4 tiles of 10x10 each);
635      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
636      - update results of both test (std & dwnslp).
637    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
638       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
639    o model/src:
640      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
641        and fix initialisation when using sigma-coords.
642    o model/src:
643     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
644       to their current value at the beginning of forward_step.F": add a new run-time
645       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
646     - set doResetHFactors=T in the following test exp:
647        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
648        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
649        and tutorial_global_oce_in_p (nonLinFS in p)
650    o pkg/ecco
651      - added IES cost term
652    o verification/advect_xz
653      - scale down the depth by 1/100 (from 200 km to just 2.km)
654      - add secondary test using divergent flow, r-star and implicit vertical advection.
655      - add note (check_conserve_TS.txt) and matlab script to check global
656        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
657    o pkg/rbcs:
658      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
659    o pkg/obcs (Stevens BCs):
660      - fix various problems in the phase speed computations of the Stevens
661        boundary conditions:
662        - sign error for western and southern boundaries,
663        - time tendencies were underestimated by factor of dTracerLev and some just
664          zero (for multidim advection schemes) -> now estimate time tendencies
665          from difference between previous (n) time level and the one before (n-1);
666          this requires storing a field per tracer per boundary, also in the pickup
667          files.
668        - replace deltaTmom in cflMer/Zon computation with dTracerLev
669        - set default phase velocity to cflMer/Zon
670      - update verification experiment exp4.stevens
671    o pkg/generic_advdiff (implicit_r):
672      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
673        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
674      - fix implicit vertical diffusion or advection with NonLin FreeSurf
675        (was using current recip_hFacC instead of future recip_hFacC): set future
676        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
677        solver S/R ;
678      - fill diagnostics of vertical advective fluxes (computed from tendency)
679        when using implicit vert. advection;
680      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
681         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
682         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
683         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
684    o pkg/diagnostics:
685      - add diags for T & S tendency which goes through Adams-Bashforth.
686    
687    checkpoint63f (2011/11/30)
688    o pkg/obcs/obcs_calc_stevens.F:
689      - join some loops to reduce number of if-statements
690      - fix a bug in code for northern and southern boundaries.
691    o pkg/seaice/seaice_init_varia.F
692      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
693        caused zero ice-velocities for the B-grid code
694    o pkg/seaice/seaice_init_fixed.F
695      - fix a bug in the initialisation of the second metric terms
696        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
697      - this affects all seaice configurations with useCurviLinearGrid = .true.
698        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
699        = .true. (default)
700      - the only verification experiment affected is global_ocean.cs32x15:
701        icedyn, seaice, and seaice_dynmix (AD)
702    o pkg/thsice/thsice_diagnostics_state.F
703      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
704        not contain garbage that can lead to surprises in diagstats_calc.F
705    o model/src:
706      - move bi,bj loops inside INTEGR_CONTINUITY ;
707      - call INTEGR_CONTINUITY directly from forward_step.F
708        (previously called from momentum_correction_step.F)
709      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
710        forward_step.F and pkg/ecco/the_main_loop.F
711    o model/src/do_oceanic_phys.F:
712      - reset addMass to zero only if useICEFRONT ;
713      - separated k-loop for rhoInSitu calculation ;
714      - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
715        and at constant T,S (= WdRHOdP);
716      NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
717        of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
718        transport of locally-referenced potential density);
719        to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
720    o gluemnc:
721      - replace ncrcat with ncks when adding variables to *.glob.nc
722      - change the way variables without record dimensions are handled so that
723        files that have variables with and without record variables can be glued:
724        add a record dimension with a new unique name to be able to differentiate
725        between variable with and without a-prior record dimensions. Remove
726        this record dimension before adding the variable to the *.glob.nc file.
727        This procedure automatically works also for grid.*.nc files that do not
728        have any record dimension.
729    o verification/cpl_aim+ocn:
730      - generate new reference output on baudelaire (gfortran, mpich2) (previously
731        from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
732    o pkg/obcs/obcs_calc_stevens.F:
733      - add code for northern and southern boundaries.
734      - reorder some loops to save some operations and so that drFBar can be scalar
735    o model/src:
736      - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
737        truncation) and add diagnostics for Adams-Bashforth tendency increment.
738      - update test-exp. AD output:
739        1D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
740      and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
741        front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
742        global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
743        matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
744        tutorial_global_oce_in_p, tutorial_global_oce_latlon and
745        tutorial_plume_on_slope.
746    o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
747      that vectorises. This code uses 3 extra 2D fields, F90 array assignments
748      and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
749      does not even come with an F77 compiler anymore, this should not be
750      a limitation
751    
752    checkpoint63e (2011/11/06)
753    o pkg/seaice adjoint of LSR:
754      - substantially rework STORE dirs.
755      - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
756        this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
757        and only perform SOLV_MAX_FIXED adjoint iters.
758        If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
759        always goes to same record, meaning that the last forward field will be
760        the one used in the adjoint - an approximation.
761      - now produces non-zero LSR-related gradients, and acceptable gradients for
762        An's zonal (x-z) test case (to be checked in)
763      - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
764        (but these are screwed up by the thermodynamics in the first place);
765        reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
766        output_adm.txt also reflects changes to seaice_lsr
767      - global_ocean.cs32x15:
768        * the "default" input_ad.seaice has been re-defined to always exclude dynamics
769          (output_adm.seaice.txt was updated)
770        * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
771          (output_adm.seaice_dynmix.txt)
772    o test-exp. exp4+stevens:
773      - switch off pTracers and nonHydrostatic (restart problems with NH); update output
774    o pkg/seaice (lsr solver):
775      - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
776        update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
777      - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
778      - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
779        into initial guess for linearised solver; use weight ~ (1/err)^2,4.
780      - compute (with new S/R) and print initial (+ free-driff sol. if available)
781        and final residual of linearised system.
782    o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
783      (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
784    o pkg/obcs: Stevens BCs (still only for east and west)
785      - fix Stevens BCs by using intermediate velocities of previous
786        time step as "baroclinic" contribution rather velocity of one grid cell
787        inside the boundaries; more consistent but makes the entire treatment
788        more complicated, requires new pickup files and two new S/Rs:
789        obcs_copy_uv_n and obcs_save_uv_n
790        keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
791        (undefined by default)
792      - silently move computation of some grid factors into separate loops to
793        save some recomputations
794      - add a hack for non-linear free surface
795      - add a verification experiment to exp4 that tests this code
796    o make gluemnc/xplodemnc work with (moron) non-GNU shell tools
797    
798    checkpoint63d (2011/10/25)
799    o pkg/obcs + seaice-dynamics:
800      - new implementation calls OBCS_APPLY_UVICE (in seaice_dynsolver.F) before
801        solving for uIce,vIce and prevent SEAICE_LSR or SEAICE_EVP to modify OB
802        values (consistent with an implicit method).
803      - add option OBCS_UVICE_OLD (in OBCS_OPTIONS.h, defined by default) to
804        return to older implementation (same results as before); note that none of
805        the "experimental" OBCS_SEAICE options are implemented in the new version.
806      - switch test exp. seaice_obcs to use new version (update output).
807    o pkg/seaice:
808      - add few stop (B-grid & CS-exch, B-grid & obcs, AUTODIFF & SEAICE_maskRHS)
809      - add parenthesis in Water-Ice drag calculations (evp & lsr);
810      - in seaice_lsr.F, simplify and fix AA3 setting in case sNx or sNy=1;
811        and fix case SEAICE_waterDrag=0 (but unstable if no or little seaice)
812      - update output of test exp lab_sea that uses evp or lsr (fwd+ad)
813        and global_ocean.cs32x15 (icedyn & seaice fwd+ad).
814    o pkg/layers:
815      - Include potential density as new coordinate (Thanks to David Munday)
816    o pkg/dic:
817      - Remove subroutine CALC_PCO2_APPROX_CO3 from carbon_chem.F and add
818        carbonate computation/output to CALC_PCO2_APPROX
819    o pkg/generic_advdiff
820      - make TAF generate code that vectorizes:
821        gad_dst3fl_adv_*.F, gad_u3c4_impl_r.F
822    o model/src:
823      - improve vectorization also for adjoint code of
824        solve_tridiagonal and solve_pentadiagonal. As this requires up to
825        5 new 3D-fields, this code is only turned on for the combination of
826        ALLOW_AUTODIFF_TAMC and TARGET_NEC_SX. Also remove error message
827        for singular matrix check (only for TARGET_NEC_SX).
828      - remove hard-wiring of CPP-flag ALLOW_SOLVERS_KLOOPINSIDE to
829        ALLOW_AUTODIFF. This flag now needs to be set outside of
830        solve_tri/pentadiagonal.F
831    o pkg/exf:
832      - fix previous modif in exf_readparms.F (revision 1.66: treatment of
833        optional namelist EXF_NML_OBCS).
834      - add many debug-print (to trace down where pkg/cal error msg comes from)
835    o pkg/mom_vecinv/mom_vi_hdissip.F
836      - rearrange loops so that vectorization is improved and in particular
837        the adjoint routine vectorizes. The code is a little longer now, but I
838        think easier to read.
839        Note: CPP-flag MOM_VI_ORIGINAL_VISCA4 is not tested.
840    o pkg/seaice:
841      - allow to specify initial seaice velocity from files (uIceFile,vIceFile)
842    o pkg/exch2:
843      - alternative code (without tile x tile matrix) for cumulated (global) sum;
844        used as default; keep using matrix version in adjustment.cs-32x32x1.
845    o tools/build_options:
846      - after merging some MPI and/or multi-threads specific optfiles so that
847        the modified default optfile support both built (using genmake2 -mpi
848        for the MPI built, using genmake2 -omp for OpenMP built),
849        move now obsolete optfiles to tools/build_options/unsupported/
850       (add copy of email sent to support list in doc/optfiles_changes.txt)
851    
852    checkpoint63c (2011/09/28)
853    o pkg/ebm:
854      - fix ebm_zonalmean.F for several procs in Ydir (nPy > 1); update output of
855        test exp. global_ocean_ebm (affects machine truncation, 12 digits for cg2d)
856    o pkg/seaice (SItracer pickup)
857    * Simple code for pickup of SItracer fields (#define ALLOW_SITRACER)
858      To be done:
859      - thorough testing of missing fields in S/R seaice_read_pickup
860      - thorough matching between generic tracers and specific fields used
861        (e.g. volume-weighted age, area-weighted age, salinity, ...)
862    o pkg/grdchk:
863      - all procs calculate and print finite-difference gradient (for testreport)
864      - change description output used by testreport;
865      - AD testing: also compare and report Finite-difference gradient;
866        => update all output_adm*.txt
867    o test exp. global_ocean_ebm:
868      - switch back useRealFreshWaterFlux (no problem anymore with run-off);
869        and turn on exactConserve; update (fwd) output.
870    o pkg/seaice (LSR):
871      - print to STDOUT number of solver iterations at SEAICE_monFreq interval.
872      - modify solver to deal cleanly with u/v switch at face edges (CS-grid):
873        * identical results with non-CS topology (but save up to half of EXCH calls)
874        * no much changes in cs-32 verification tests since no ice at face edges
875         (differences due to convergence criteria, since nb of iterations changed)
876        * expect some differences on lat-lon-cap grid.
877        update FWD results of global_ocean.cs32x15 test exp. (icedyn & seaice)
878    o pkg/exch2:
879      - add new CPP option to disable Cumul-Sum matrix (to save storage when using
880        many tiles); until alternative coding is added, just add a stop.
881    o pkg/kpp:
882      - move ptracer/salt correction to KPP diffusivity from calc_3d_diffusivity.F
883        to S/R KPP_CALC_DIFF_PTR (+ add tracer-index to argument list).
884    o optfiles:
885      - merged few MPI specific (*+mpi*) and multi-threads specific (*+mth) optfiles
886        into corresponding standard one, which now support different build:
887        (when using "genmake2 -mpi" for MPI built, "genmake2 -omp" for OpenMP built)
888      - add "darwin_amd64_gfortran" optfile (initially from Constantinos, tested by Gael)
889    o pkg/obcs (seaice):
890      - add missing EXCH for uIce,vIce after applying OBCS;
891      - remove S/R EXF_SWAPFFIELDS_X/Y , disable S/R EXF_SET_OBCS_X/Y by adding
892        argument = number of levels to S/R EXF_SWAPFFIELDS_XZ/YZ and S/R
893        EXF_SET_OBCS_XZ/YZ ; update obcs_exf_load.F;
894      - fix EXF_SET_OBCS_XZ/YZ for multi-threaded (assuming loaded arrays are shared)
895      - verification exp. seaice_obcs: split domain in 2 tiles ; add SIZE.h_mpi
896        and eedata.mth for MPI and mutlti-threaded testing.
897    o pkg/flt:
898      - make FLT EXCH working with multi-threads (and MPI + multi-threads);
899      - use buffer for floats IO (trajectories & profiles); size set in FLT_SIZE.h;
900      - fix pickup and trajectories + profiles output with multi-threads;
901      - add parameter to select group of fields to write along trajectory and
902        profile (default unchanged);
903      - only call PORT_RAND* function when flt_noise <> 0;
904      - add multi-threaded test for verification exp. flt_example.
905    o eesupp/src:
906      - fix S/R ALL_PROC_DIE for MPI+multi-threads.
907      - USE_OMP_THREADING: check that number of threads (from eedata) matches
908        actual number (from env.var. setting).
909    o pkg/ebm:
910      - fix multi-threading in ebm_area_t.F ; clean-up EBM.h header file.
911      - add multi-threaded test for verification exp. global_ocean_ebm
912    
913    checkpoint63b (2011/08/29)
914    o pkg/ebm:
915      - fix sign of runoff;
916      - update directly forcing fields (Qnet,EmPmR) to use standard
917        external_forcing_surf.F (remove ebm_forcing_surf.F);
918      - avoid loading forcing fields a 2nd time (1rst time from ini_forcing.F);
919      - set either tauThetaClimRelax (in data) or tauThetaZonRelax (in data.ebm)
920        and apply relaxation towards corresponding SST field (2-D map or ZonAver).
921      - update global_ocean_ebm parameters file data and update output (fwd+ad).
922    o verification/matrix_example:
923      - split domain in 8 tiles (2x4); add SIZE.h_mpi and eedata.mth for
924        MPI and mutlti-threaded testing.
925    o pkg/matrix:
926      - change name of S/R MATRIX_INIT to S/R MATRIX_INIT_VARIA ;
927      - fix for multi-tiles (add bi,bj indices to exp/impMatrixCounter);
928      - fix for multi-threaded (remove DATA statement);
929      - use standard DIFFERENT_MULTIPLE function;
930      - add MATRIX_OPTIONS.h
931    o verification/matrix_example:
932       To allow to split the domain in several tiles, change the domain size
933        from 31x31 to 32x32 by adding 1 row (on Southern side) + 1 column (on
934        Western side) of land points.
935    o (*_)write_pickup:
936      - fix few bugs in mypackage_read/write_pickup.F
937      - in MDS_WR_METAFILES calls, replace "myTime" by a local copy into
938        array of length 1 (was caught by compiler syntax-check).
939    o pkg/diagnostics (velocity potential solver):
940      - fix initialisation of main diagonal matrix (for overlap values)
941    o tools/build_options:
942      - towards single optfile for MPI and non-MPI built: merge few +mpi optfile
943        into previously non MPI one (linux_am64 pgf77,open64,pathf90,ifort11)
944      - linux_amd64_gfortran: merge +mpi_generic version into standard optfile:
945        * move IEEE flags to DEVEL section; take IEEE flags from +mpi_generic ;
946        * FAST case: for now, keep -O3 with ini_masks_etc.F in NOOPTFILES list;
947        and use "-devel" testreport option for standard testing on baudelaire.
948    o pkg/grdchk:
949      - Assume that all gradient-check position are within the same tile
950        corresponding to global indices (iGloTile,jGloTile) and that
951        positions (i,j indices or nbeg) are local to this tile;
952      - set tile local-indices and proc. number according to tile global-indices;
953      - remove grdchkwhichproc from namelist (retired param);
954      - send adjoint gradient to all procs so that all procs print it to STDOUT;
955      - switch on MPI test for global_ocean.90x40x15 AD test experiment.
956    o adding package bbl (Bottom Boundary Layer)
957      description in MITgcm/pkg/bbl/bbl_description.tex
958      example/test experiment in MITgcm_contrib/bbl
959    o adjoint verifications
960      - changed 5 experiments to multi-tiles
961        * global_ocean.90x40x15
962        * obcs_ctrl
963        * offline_exf_seaice
964        * tutorial_dic_adjoffline
965        * tutorial_tracer_adjsens
966        changed reference output for those that crossed tile boundaries
967        (changed choices of gradient check positions)
968      - with same tiling, switch on MPI test for the last 4 (add SIZE.h_mpi)
969      - temporary bug fix in grdchk_loc.F for obcs
970    o genmake2 & testreport
971      - add target "obj" (just for OBJFILES files) to Makefile;
972      - add option to specify FEXTRAFLAGS on command line.
973    o pkg/mypackage:
974      - remove bi,bj arguments from argument list of S/R MYPACKAGE_CALC_RHS
975    
976    checkpoint63a (2011/08/02)
977    o pkg/diagnostics (velocity potential):
978      - fix velocity-potential calculation when using OBCS: balance net inflow
979        at each level (new S/R OBCS_DIAG_BALANCE).
980      - fix some of the problems with OBCS in stream-function calculation.
981    o pkg/exf/exf_readparms.F
982      - make treatment of optional namelists (EXF_NML_04, EXF_NML_SGRUNOFF,
983        EXF_NML_OBCS) more consistent, so that you need not have these lists
984        in data.exf when they are not used.
985    o optim/optim_readdata.F:
986      - add some output about obcs variables that might help debugging
987      - add a check about nvarlength
988    o pkg/ctrl: once again, fix computation of endrec in s/r ctrl_init_rec
989    o pkg/diagnostics (velocity potential):
990      - fix mask for OBCS (still problems in stream-function with OBCS);
991      - add specific parameter (default = main code CG2D params) for solver;
992      - in case of poor convergence, use solution corresponding to lowest residual.
993    o pkg/seaice/seaice_growth.F: small changes that permit vectorizable
994      adjoint code. In general statements like tmpscal=fld(i,j) are problematic
995      and should be avoided where possible.
996    o model/src (rStar):
997      - include r* effect on reference-state (PhiRef) in totPhiHyd
998        (so that it's really the potential anomaly at the cell center);
999        affect solution only if z* with full pressure in EOS.
1000      - test-exp global_ocean.90x40x15: reduce viscA4 (was not stable) and
1001        update output (because of z* in totPhiHyd and viscA4 changes);
1002      - keep the previous diagnostics as "PHIHYDcR" (closer to potential anomaly
1003        @ constant r) until interpolation at constant r is implemented.
1004    o pkg/diagnostics
1005      - fix RCENTER diagnostics in case cell center is not at interface middle
1006    o add code for TEOS-10 (www.teos-10.org, McDougall et al. 2011). Use
1007      this eos with eosType = 'TEOS10', in data (PARM01). This eos implies
1008      that THETA and SALT are "conservative temperature" and "absolute
1009      salinity"
1010    o pkg/ctrl
1011      - fix computation of endrec in s/r ctrl_init_rec
1012      - ctrl_pack/unpack_*: remove unused variables and some obsolete code
1013    o pkg/seaice/seaice_growth.F
1014      - fix recomputation with FENTY_AREA_EXPANSION_CONTRACTION code,
1015        remove then obsolete STORE directives
1016      - fix STORE directives for tice and tices, so that only the
1017        appropriate part of the fields are stored (and not the entire
1018        field); update global_ocean.cs32x15.seaice AD output.
1019      - cosmetic changes: adjust CPP flags and indentation for better
1020        legibilty
1021    o pkg/autodiff: add mnc-output of adBottomDragFld (code contributed by
1022      Chris Wilson)
1023    o pkg/gmredi:
1024       Add Sub-Meso Eddies parameterisation from Baylor (for now, disabled with TAF),
1025       and test it in verification exp. "front_relax.bvp" (update output.bvp.txt)
1026    
1027    checkpoint63  (2011/07/11)
1028    o pkg/exch2:
1029     - rename+move: nTiles in W2_EXCH2_PARAMS.h --> exch2_nTiles in W2_EXCH2_TOPOLOGY.h
1030     - exch2 version of Cumul-Sum routine: S/R W2_SET_MAP_CUMSUM set up the
1031       (2*nTiles)x(nTiles) Cumul-Sum matrix and Master Proc collects all tiles X,Y
1032       increments, calculates Cumul-Sum @ tile origin and sends results to each tile.
1033    o pkg/diagnostics:
1034     - deal with pairs of post-processed diags which are computed together; in
1035       particular, re-order list of diags within 1 file to save 2nd computation.
1036     - add S/R to compute velocity stream-function (called after velocity-potential
1037       calculation) from divergence free transport -> new diagnostics "PsiVEL".
1038     - add parameter to select grid-point location where PsiVEL == 0.
1039    o eesupp/src:
1040       new S/R to calculate cumulated sum on tiled array, corner grid-cell location
1041       (specific S/R needed with exch2 topology - for now, just print an error msg)
1042    o pkg/shelfice
1043     - Implement friction velocity-dependent transfer coefficients following
1044       Holland and Jenkins, JPO, 1999
1045       Original code by M. Losch with small modifs.
1046       Enable with CPP option SHI_ALLOW_GAMMAFRICT
1047       and runtime flag SHELFICEuseGammaFrict
1048    o verification lab_sea & global_ocean.cs32x15:
1049     - use tools/xmakedepend (instead of cyrus_makedepend, in genmake_local):
1050       does not miss some dependencies (but is slower) and also works with many files
1051       (default makedepend limitation for AD built).
1052     - use cyrus_makedepend in adjustment.128x64x1 (so that it still tested).
1053    o pkg/diagnostics:
1054     - add run-time parameter "useMissingValue" (def=False) to fill land-point
1055        (i.e., where mask=0) with MissingValue ; used only in MNC output file.
1056       This replaces CPP-option DIAGNOSTICS_MISSING_VALUE.
1057     - Extend the use of "missing_value" setting from data.diagnostics for the case
1058       of counter-diagnostics (where fraction-weight is zero). This applies both to
1059       MNC and MDS output files.
1060    o pkg/seaice/seaice_growth.F:
1061      - add 'a priori' cap of latent heat flux based on actual mass considerations
1062        when SEAICE_ADD_SUBLIMATION_TO_FWBUDGET is used in conjunction with the
1063        non-legacy seaice_solve4temp.
1064      - add diagnostic of the residual sublimation freshwater flux (the freshwater
1065        flux taken from the ocean if the total actual latent heat fluxes exceed
1066        the maximum)
1067      - remove the CPP switch around the *_FWbySublim unit change and move diagnostic
1068       fill for SIatmQnt, SIfwSubl, SIatmFW to the end of seaice_growth.F.
1069      - add diagnostic of the actual sublimation freshwater flux (that is 0. ifndef
1070       SEAICE_ADD_SUBLIMATION_TO_FWBUDGET) and of the latent heat flux (evap+sublim).
1071      - bug fix : frWtrAtm needs a_FWbySublim ifdef SEAICE_ADD_SUBLIMATION_TO_FWBUDGET.
1072      - bug fix : missing part to Martin's r_FWbySublim pathological case fix.
1073    o verification 1D_ocean_ice_column:
1074       made model domain truly 1x1x23 instead of 5x5x23 with only center cell (3,3,:) wet
1075       update results
1076    o pkg/diagnostics:
1077     - Implement setting of "Post-Processed" diagnostics (corresponding to gdiag(5)='P')
1078       which are not filled-up but computed from other diags ; In this case, the mate
1079       diag points to the primary (filled-up) diag to used for post processing.
1080     - Update Velocity-potential computation using post-processed diag framework.
1081     ==> Change the ordering of fields and time-periods in MDS output file
1082       when using periodic averaging: now writes one time record with the full set
1083       of fields for this time period, then the next time reccord (it used to be
1084       one field with the full set of time records then the next field).
1085         Note: this is now similar to NetCDF (MNC) output file. <==
1086    
1087    checkpoint62z (2011/06/21)
1088    o adjoint monitor:
1089     - Add adjoint monitor output for packages exf, seaice
1090       and update relevant testreport output
1091    o pkg/seaice:
1092     - re-order diags inits so that they appear in order in available_diagnostics.log
1093     - added diags: hsnow thermo. rates of change, area preceeding ridiging process,
1094       area/heff/hsnow preceeding thermodynamic growth/melt.
1095     - modified diag: SIdA; output actual effect, as the description states.
1096     - modified description: SIqneti, SIqneto, SIuheff, SIvheff, SIdAb*, HSNOW.
1097     - retired redundant diags: SIyneg, SIfice, SIsnwice, SIthdgrh.
1098       (SIyneg->SIdHbOCN; SIfice->SIdHbATC; SIsnwice->SIdHbFLO;
1099        and SIthdgrh->SIdHbOCN+SIdHbATC+SIdHbATO)
1100     - modified diags (2) : switch all SIdA*, SIdH*, SIdS* from delta to rates.
1101     - added diagnostics for seaice generic tracers (SItr*).
1102     - added SItrUnit and SItrNameLong run time param (for SItr* diags).
1103     - in diag names, replaced 'PrTh' abbrev. of 'preceeding thermo' with 'PT'.
1104     I. Fenty: 18-Jun-2011:
1105     Minor changes to seaice package:
1106     1) Retired old variables (A22, SEAICE_lhsublim, areaMax, areaMin, hiceMin) and
1107        added some new ones (SEAICE_area_reg, SEAICE_hice_reg, SEAICE_area_floor)
1108       - Differentiated "regularization variables" from "floor variables"
1109        * areaMin became SEAICE_area_reg (old A22) and SEAICE_area_floor
1110        * hiceMin became SEAICE_hice_reg (old hiceMin)
1111          (with _reg meaning regularization variable)
1112       - SEAICE_lhSublim becomes lhSublim, the sum of SEAICE_lhEvap and SEAICE_lhFusion
1113        so as to ensure energy conservation when going between phases
1114      - A22 was not used anywhere
1115     2) Changed regularization procedure for heffActual and hsnowActual to ensure
1116        well-boundedness and smooth adjoint in seaice_growth.F
1117     3) Fixed a bug where seaice_solve4temp would not recognize ice-free grid cells
1118        because the old regularization always set heffActual >= 0.05 cm
1119     4) Changed the model so that the default behavior is to put a small (10^-5) "floor"
1120        on AREA when HEFF > 0.
1121      - went from requiring ALLOW_PRECLUDE_INFINITESIMAL_AREA to be defined to
1122        requiring that DISABLE_AREA_FLOOR *not* be defined
1123     Affected verifications:
1124      - 1D_ocean_ice_column (output.txt output_adm.txt)
1125      - global_ocean.cs32x15 (output.seaice.txt output_adm.seaice.txt)
1126    o pkg/diagnostics:
1127      - move MNC code from diagnostics_out.F into new diagnostics_mnc_out.F (2 S/R).
1128      - rename S/R GETDIAG to DIAGNOSTICS_GET_DIAG and change type of 1rst argument
1129        (was _RL, now integer) with option = 0 to retrieve all levels.
1130      - add pieces of code to compute velocity potential at each level (new diagnostics
1131        PhiVEL, works only when UVELMASS & VVELMASS are also turned on);
1132        for now, using same params as CG2D (target-resisual, max Nb of iter ...).
1133      - fix few issues with counter diagnostics in diagnostics_setdiag.F &
1134        diagstats_setdiag.F (if diagnostic counter is itself a counter diag)
1135        and in diagnostics_fract_fill.F (do not need a valid pointer for the
1136        diagnostics counter-mate); check that definition of counter-diagnostic
1137        includes a valid counter-mate (in diagnostics_set_levels.F).
1138    o model/src (rStar):
1139      - add rStar scaling factor in diags_phi_hyd.F (similar to calc_grad_phi_hyd.F);
1140        affect solution only if z* with full pressure in EOS;
1141        update output of test-exp global_ocean.90x40x15.
1142    o pkg/seaice:
1143      - introduce siEps=1e-5 parameter
1144      - use areaMax in AREA update (part 4), consistent with ridging step (part 2.5).
1145      - re-organize SEAICE_ADD_SUBLIMATION_TO_FWBUDGET code.
1146      - introduce ALLOW_SITRACER and seaice_tracer_phys.F to handle generic seaice tracer.
1147        For now it covers, and was tested for, ice salinity and age (attached to HEFF),
1148        as well as ice cover age and ridging index (attached to AREA).
1149        For now the run time parameters (in data.seaice/SEAICE_PARM03) are
1150        SItrName (e.g. 'age') and SItrMate ('HEFF', which is the default, or 'AREA').
1151        Up to SItrMaxNum=3 tracers can be used simultaneously.
1152    o pkg/salt_plume:
1153      -introduce SPsalFRAC run time parameter that sets the fraction of the
1154       salt by-product of ice growth (SPsalFRAC*(1-SIsalFRAC)*salt typically)
1155       that gets vertically redistributed (fluxed down) by pkg/salt_plume.
1156    o model debug options:
1157      - Switch reading of debugMode from S/R INI_PARMS (parameter file "data", stored
1158        in PARAMS.h) to S/R EESET_PARMS (parameter file "eedata", stored in EEPARAMS.h).
1159      - Refine debug-msg printing selection (3 new levels):
1160        debugMode  : controls printing of debug messages (sequence of S/R calls).
1161        debugLevel : controls printing of algorithm-relevant auxiliary/debug messages
1162         debLevZero =  0 ; /* level of disabled aux. msg printing */
1163         debLevA =  1 ; /* level of minimum  aux. msg printing */
1164         debLevB =  2 ; /* level of low aux. print (report read-file opening)*/
1165         debLevC =  3 ; /* level of moderate debug prt (most pkgs debug msg) */
1166         debLevD =  4 ; /* level of enhanced debug prt (add DEBUG_STATS prt) */
1167         debLevE =  5 ; /* level of extensive debug printing */
1168        New debugLevel default: with default debugMode value (=F),
1169          = 2 (debLevB) or = 1 (debLevA) in case ALLOW_AUTODIFF is defined.;
1170          and if debugMode=T, default debugLevel = 4 (debLevD).
1171        Relation with previous settings:
1172         debLevB (=2) corresponds to former debLevA (=1)
1173         debLevD (=4) corresponds to former debLevB (=2)
1174        Note:
1175         a) if debugLevel=0, skip WRITE_GRID call when nIter0 > 0 (same as before);
1176         b) default debugLevel=1 is convenient in AD runs (avoid many file opening msgs);
1177            to recover previous default, set debugLevel=2 (e.g. AD-test hs94.1x64x5)
1178      - Add new parameter (printResidualFreq, read from PARM02 namelist) to print
1179        detailed CG solvers convergence; off (=0) by default, except if debugLevel=5.
1180    o pkg/obcs:
1181      - change OBCSfixTopo default from True to False (should not change the results);
1182        keep OBCSfixTopo=T in verification-exp. seaice_obcs.
1183    o pkg/thsice:
1184      - fix bug in thsice_calc_thickn.F (was introduced in version 1.18) in
1185        2nd layer seaice sublimation (unlikely to happen)
1186      - use Interior mask for OBCS in thsice_advection.F (similar to what is
1187        done in gad_advection & seaice_advection).
1188    o adjoint:
1189      bug fix spotted by Gael Forget:
1190      seaice_advection and thsice_advection still had
1191      legacy CPP options to avoid CS corner updates for adjoint
1192    o pkg/seaice:
1193      => Change some of the defaults (2011/05/29):
1194         - change SEAICEuseFluxForm default (from False to True)
1195         - change DIFF1 default (from 0.004 m/s to 0. m/s)
1196         And print warnings if DIFF1 is not set in data.seaice and centered
1197          avection scheme is used without any diffusion.
1198      also:
1199      - fix seaice_diffusion calls in default AdvScheme part of seaice_advdiff.F;
1200      - set SEAICEdiffKh[] default in the same way as SEAICEadvSch[]
1201      - stop if DIFF1<>0 with SEAICEadvScheme <> 2, if DIFF1<>0 with any
1202        other non-zero SEAICEdiffKh[] diffusivity, if SEAICEadvSalt=T with
1203        #undef SEAICE_VARIABLE_SALINITY, if SEAICEadvAge=T with #undef SEAICE_AGE.
1204      update results of test exp.:
1205         lab_sea: output.fd (switch to AdvScheme=33 with diffKh=20)
1206             output.hb87, output_adm.evp (SEAICEuseFluxForm=T and diffKh=200)
1207             output_adm.noseaicedyn (SEAICEuseFluxForm=T)
1208         offline_exf_seaice: output.seaicetd, output_adm (SEAICEuseFluxForm=T)
1209         seaice_obcs: output (SEAICEuseFluxForm=T)
1210      and prescribe old default for SEAICEuseFluxForm (=F) and DIFF1 (=0.004)
1211          for standard fwd & AD lab_sea tests (to keep the same output).
1212    o pkg/seaice/seaice_growth.F:
1213      - use Ian Fenty's capping formulas for actual ice
1214      thickness thoughout EVOLUTION branch.
1215      - put treatment pathological case #2) in CPP brackets
1216      (ALLOW_AVOID_INFINITESIMAL_AREA, undef by default).
1217      - update global_ocean.cs32x15 and 1D_ocean_ice_colum results accordingly.
1218    o pkg/seaice:
1219      - seaice_diffusion.F : remove the min(DX,DY) factor permanently;
1220      pass the Laplacian diffusivity (in m^2/s) diffKh as a parameter;
1221      also pass fac as a param, which can be 1. (to update the tendency
1222      field) or the time step (to update the field itself).
1223      - seaice_advdiff.F: for multidim, call seaice_diffusion with
1224      e.g. SEAICEdiffKhHeff and with fac=1; for single-dim, call
1225      seaice_diffusion with e.g. SEAICEdiffKhHeff and with fac=time step.
1226      - SEAICE_PARAMS.h, seaice_readparms.F, seaice_check.F :
1227      hooks to handle SEAICEdiffKhHeff, SEAICEdiffKhArea, etc.
1228    o pkg/seaice:
1229      diffusion with centered advection scheme (diffus.F & advect.F):
1230      - simplify S/R DIFFUS (put deltaT & DIFF1 factor outside, move EXCH outside)
1231        to just compute the laplacian of input-field.
1232      - unroll k loop (harmonic,biharmonic diff) in advect.F to save 1 exch call.
1233      - fix flux-form version in diffus.F to conserve tracer.
1234      update output of lab_sea.fd & lab_sea.hb87 (1rst set of modif affects
1235       machine truncation) and lab_sea.salt_plume (conservative flux-form modif)
1236    
1237    checkpoint62y (2011/05/26)
1238    o pkg/seaice:
1239     - seaice_growth.F : in EVOLUTION branch, always include
1240       a_QSWbyATM_cover in qnet (as it should be).
1241     - verification/global_ocean.cs32x15 : update results accordingly
1242       (output.seaice.txt output_adm.seaice.txt).
1243    o pkg/seaice + obcs:
1244     - use maskInW & maskInS in multi-dim advection and biharmonic diffusion:
1245       equivalent of assuming no tracer gradient outside the OB region.
1246       update output of seaice_obcs (uses DIFF1 <>0 => biharmonic diffusion)
1247     - remove calls to OBCS_COPY_TRACER after EXCH calls (no longer needed
1248       after changes above);
1249     - obcs+seaice cleaning: apply seaice-tracer OB values to tracer field
1250       only at OB location (instead of over a band of OLx width).
1251    o pkg/seaice:
1252     - fix wrong indices in old (non Flux-Form) diffusion default S/R diffus.F
1253       (dxG(I+1, ...) changed to dxG(I, ...), no impact on Lat-Lon grid)
1254    o pkg/obcs:
1255      - split header file "OBCS.h" into 4 separated files:
1256        OBCS_PARAMS.h, OBCS_GRID.h, OBCS_FIELDS.h & OBCS_SEAICE.h
1257       Note: OBCS_PARAMS.h & OBCS_GRID.h can be included without OBCS_OPTIONS.h
1258         (contain no conditional statement which depends on OBCS options).
1259      - move "useOBCSYearlyFields" from "data.obcs" (hold in OBCS_PARAMS.h)
1260        to parameter file "data.exf", namelist EXF_NML_OBCS (in EXF_PARAM.h).
1261    o ctrl, cost, grdchk & autodiff pkgs:
1262      - make options file more standard (like other {PKG}_OPTIONS.h file but
1263        with AD_CONFIG.h); clean-up some of the included header files.
1264    o pkg/obcs:
1265      - do not mask tracer when applying OB (tracer == 0 could generate problems)
1266      - apply tracer OB values to tracer field only at OB location (instead of
1267        over a band of OLx width)
1268      - clean-up obcs_apply_w.F & obcs_apply_eta.F (since less calls to these S/R)
1269      - remove OBCS_MULTIDIM_OLD_VERSION code in gad_advection.F and remove
1270        obcs_apply_tloc.F & obcs_apply_sloc.F
1271    o obcs in model/src:
1272      - call OBCS_APPLY_W only if NonHydrostatic.
1273      - call OBCS_APPLY_ETA only if NonLinFreeSurf.
1274      - reset dEtaHdt and wVel to zero outside OB interior region ;
1275      - leave tracer unchanged outside OB interior region: This has no effect
1276        on the solution but just to prevent unrealistic tracer value outside OB.
1277      - zero out velocity outside OB interior region: This has no effect on
1278        the solution but just to prevent unrealistic velocity outside OB.
1279    o obcs and non-lin free-surf:
1280       move call to OBCS_APPLY_R_STAR from update_r_star.F to calc_r_star.F
1281       and call to OBCS_APPLY_SURF_DR from update_surf_dr.F to calc_surf_dr.F
1282       + add argument "etaFld" to OBCS_APPLY_R_STAR & OBCS_APPLY_SURF_DR:
1283       this fixes missing EXCH + get consistent eta OB value (+ fix restart).
1284       update results of test-exp. exp4(nlfs).
1285    o exp4 (nlfs) test-exp:
1286       use OBC for Eta at Western & Eastern OB (to test prescribing Eta
1287       with NonLin-FreeSurf); update output.nlfs.txt
1288    o obcs and 2d/3d solver norm:
1289       use interior masks (maskInC) to cancel out cg2d & cg3d matrix coeff at OB
1290       and outside OB interior region (will allow to place OB further inside the
1291       domain). Depending on the domain, can affects cg2d-Norm (previous
1292       cancellation outside OB was only partial), e.g. in exp4 & obcs_ctrl,
1293       and cg3d-Norm (previous Norm was computed before canceling OB terms),
1294       e.g. in tutorial_plume_on_slope.
1295      - update output of exp.: exp4 (x2), obcs_ctrl and tutorial_plume_on_slope.
1296    o pkg rbcs:
1297      - split RBCS.h into 3 files: RBCS_SIZE.h, RBCS_PARAMS.h & RBCS_FIELDS.h
1298      - add capability to apply relaxation to horizontal velocity uVel & vVel.
1299    o pkg/grdchk: add gradient check for control variable xx_shifwflx
1300    o pkg/shelfice/shelfice_init_fixed.F
1301      fix CPP-flag combinations
1302    o pkg/seaice: Merge iceage code of Pierre Rampal
1303      * update/change/correct ice age calculations
1304      * add age updates for pathological cases
1305      Probably needs more testing...
1306    
1307    checkpoint62x (2011/05/13)
1308    o pkg/mom_vecinv:
1309       high-order vorticity scheme: use interior masks (maskInW & S)
1310       to zero-out (outside OB) gradient of vorticity.
1311    o verification exp.:
1312       turn on "useEnergyConservingCoriolis" (better discretisation) in exp.
1313       hs94.128x64x5 and seaice_obcs ; update results.
1314    o pkg/obcs:
1315      fix bug in OBeta for YZ sections in obcs_exf_load.F
1316    o pkg/ctrl, pkg/shelfice, and optim:
1317      - add new control variable xx_shifwflx (fresh water flux underneath ice
1318        shelves). This is almost as tedious as obcs-ctrl, because the
1319        variables needs its own mask.
1320      - add a cost function term that penalizes the deviation of xx_shifwflx
1321        from the first guess (zero) in analogy to other control variables
1322    o pkg/shelfice:
1323      - start basic adjoint
1324    o pkg/ctrl:
1325      - remove extra 2D field "for good measure" when initializing in
1326        ctrl_set_globfld_[xy/xz/yz].F
1327      - replace hard coded precision 32 (a bug) in ctrl_map_ini_gen by ctrlprec
1328      - improve error messages in ctrl_set_unpack_*
1329    o OBC implementation in momentum:
1330       use interior masks (maskInC,W & S) in momentum S/R:
1331       - multiply divergence, tension and some del^i.u or del^j.v by maskInC
1332       - multiply del2u,del2v by maskInW/S (biharmonic viscosity)
1333       - multiply horiz. grad of vorticity by maskInW/S (in Leith scheme)
1334       - multiply gradient of wVel by maskInW/S in del2w calculation (NonHyd)
1335       Motivation: fix/clean implementation of OBC with biharmonic-viscosity
1336        (and also with Leith/Smagorinsky harmonic-viscosity).
1337       Update output of experiment dome and exp4 (+nlfs).
1338    o exp4 test-exp:
1339      - turn on: nonHydrostatic, exactConserv, viscA4 (with momDissip_In_AB=F)
1340        and prescribe time-varying OB (without pkg/exf) for zonal-velocity
1341        at Western & Eastern Boundaries (+/- 1 per-cent); Also prescribe
1342        time-varying OB at Western-side for wVel (NonHyd); update output.
1343      - add secondary set-up (.nlfs) using NonLin FreeSurf (z*) + mom_vecinv
1344        and biharmonic-viscosity ; also use prescribed time varying OB.
1345    o pkg/obcs:
1346      fix bug in OBWeta,OBWeta indices in obcs_apply_r_star.F
1347    o model/src:
1348      - fix startTime setting when baseTime<>0 & nIter0=0 are specified ;
1349      - initialise startTime & nIter0 with unlikely values: allows to set one
1350        from the other without ambiguity.
1351    o seaice_obcs test-exp.:
1352      add small diffK4T,S to test biharmonic diffusivity with OBCS ; update output.
1353    o pkg/obcs:
1354      - remove calls to OBCS_COPY_TRACER after EXCH for T,S & pTracer:
1355        no longer needed with maskInC,W,S in pkg/generic_advdiff.
1356    o pkg/seaice:
1357      - retired SEAICE_SALINITY and SEAICE_salinity in favor of
1358        SEAICE_VARIABLE_SALINITY and SIsalFRAC, respectively.
1359      - fixed bug in the initialization of sea ice salinity variable HSALT
1360        in seaice_init_varia.F  (removed dependence on ICE2WATR)
1361    o fizhi-cs test exp.:
1362       switch reference output convention for these 2 non-standard test-exp,
1363        from: pgi  6.1-5 on faulks (FC.6, -of linux_ia32_pgf77+authors_fc5)
1364          to: ifort 11.1 on baudelaire (FC.13, -of linux_amd64_ifort11)
1365       reason: faulks might get retired soon and pkg/fizhi has still Pb with gfortran
1366    o model/inc:
1367      - change type of PmEpR array (from _RS to _RL) to fix restart (with "-use_r4")
1368        of exp. global_ocean.90x40x15 (Suncronous time-stepping + Real-FW + NonLin-FS)
1369    o pkg/seaice:
1370      - fix calculation of saltFlux and saltPlumeFlux when using SEAICE_SALINITY
1371    o verification/lab_sea, 1D_ocean_ice_column, seaice_obcs, global_ocean.cs32x15
1372      - updated output*.txt files due to bug fixes in salt, saltPlumeFlux,
1373        and initial HSALT
1374    
1375    checkpoint62w (2011/04/26)
1376    o pkg/mom_fluxform:
1377      - fix calculation of del2u & del2v (no-slip BC) when using Non-Lin Free-Surf.
1378      - use parameter "sideDragFactor" in no-slip BC side-drag part.
1379      - update output of exp. global_ocean.90x40x15
1380    o pkg/mom_vecinv:
1381      mask del2u & del2v (no effect on results, but cleaner & closer to mom_fluxform)
1382    o update seaice exp.:
1383      use more consistent parameter values (remove "backward compatability only":
1384       ICE2WATR, SEAICE_lhSublim, SEAICE_cpAir, SEAICE_rhoAir + set rhoConstFresh)
1385      related to thermodynamics seaice. Update output (fwd+AD) of exp.:
1386       1D_ocean_ice_column (x2), lab_sea (x8), ioffline_exf_seaice (x2) & seaice_obcs
1387    o update test-exp global_ocean.90x40x15:
1388      o use default CD_CODE_OPTIONS file (Adams-Bashforth on CD Mom & Coriolis).
1389      o increase Overlap size from 2 to 3 (to allow to test bi-harmonic Visc.)
1390      o new pickup-files from a 100.yr run with pkg/down_slope (input.dwnslp params)
1391      o turn on zStar & viscA4 in standard set-up (dir input/)
1392        and update output files: output.txt & output.dwnslp.txt
1393    o new AD-test experiment: obcs_ctrl
1394      (From Matt MITgcm_Contrib/SOSE/BoxAdj) to test OBCS as control vector.
1395    o pkg/dic:
1396      fix two bugs in handling water vapour pressure in carbonate chemistry
1397      and air-sea fluxes. Found by Val Bennington and Galen McKinley
1398      (add DIC Option = WATERVAP_BUG to recover old results)
1399      update output of tutorial_global_oce_biogeo (fwd+AD) & tutorial_dic_adjoffline
1400    o adding allowInteriorFreezing option to check for water below freezing point
1401      at depth and bring the negative heat anomaly to the surface level
1402    o pkgs _fields_load:
1403      - extend GET_PERIODIC_INTERVAL to deal with non-periodic case (from pkg/rbcs)
1404      - use new S/R GET_PERIODIC_INTERVAL in pkgs:
1405        bulk_force, cheapaml, cfc, dic, obcs (+ ctrl/ctrl_get_gen_rec), offline and
1406        rbcs to get interpolation weights and time reccord number.
1407      - fix multi-threading in aim_fields_load.F
1408      - apply EXCH to temp arrays [0,1] after reading in dic_fields_load.F
1409    o external_fields_load:
1410      new S/R GET_PERIODIC_INTERVAL to calculate which time-record (and linear
1411       interpolation weights) to use in a periodic time-series ; do not divide by
1412       time-step to convert to integer:
1413       - this fixes case where externForcingPeriod is not multiple of time-step
1414          (Thanks to Christopher L. Wolfe)
1415       - this fixes case where externForcingPeriod is an odd multiple of time-step
1416         (was wrong by half of time-step); update results of tutorial_global_oce_in_p.
1417      store index of time-record which is currently loaded:
1418       - works without any assumption on sequence of calls to EXTERNAL_FIELDS_LOAD ;
1419       - needed for the adjoint but not yet used because of extensive recomputations;
1420         (to be fixed soon)
1421    
1422    checkpoint62v (2011/04/02)
1423    o verification/1D_ocean_ice_column added to test Ian Fenty's
1424      pkg/seaice_growth.F modifications for improving sea ice code differentiability
1425    o update output of exp4, internal_wave, seaice_obcs, tutorial_plume_on_slope
1426      (new velocity statistics after changing maskInW & maskInS definition)
1427    o pkg/generic_advdiff with OBCS:
1428      use maksInW & maskInS in advective flux and in biharmonic diffusion calculation:
1429      equivalent to assumption of no tracer gradient outside the OB region.
1430      This will affect the results if using obcs+biharmonic diffusion.
1431      update output_adm.txt of experiment bottom_ctrl_5x5 (not expected since no obc)
1432    o pkg/obcs:
1433      change definition of maskInW & maskInS: leave OB edges inside (maskIn=1)
1434      (e.g., maskInW(OB_Ie)=1 ) so that velocity normal-component at OB is still
1435      in Interior region. No impact on solution but affects Velocity monitor stats.
1436    o pkg/ptracers (adjoint)
1437      New option AUTODIFF_PTRACERS_SPLIT_FILES for writing separate
1438      tape file for each tracer
1439    o model/inc/src and pkg/autodiff: add parameters that allow to turn
1440      of parts of the adjoint code at run time. For now, there are only
1441      useKPPinAdMode, useGMrediInAdMode, and useSEAICEinAdMode. These
1442      parameters are set in data.pkg.
1443      This is the lazy coward's version of doing this, but still useful for
1444      debugging. In order to do it right, everything needs to be moved to
1445      pkg/autodiff.
1446    o pkg/autodiff: fix global_sum_tile_ad.F by resetting adsumPhi at
1447      the end; this fixes the adjoint balancing code for open boundaries.
1448    o pkg/ctrl:
1449      - change behavior of xx_${varname}period to be analogous to exf-conventions:
1450        xx_${varname}period =   0.,  means time-independent control part
1451        xx_${varname}period = -12., means one-year-periodic monthly control part
1452      - introduce helper routine ctrl_init_rec (part of ctrl_init.F) to
1453        clean up ctrl_init a little, remove unused variables
1454      - ctrl_init: fixed the handling of the start/endrec for obcs-variables
1455      - move "call cal_GetMonthsRec" from s/r ctrl_get_gen to s/r ctrl_get_gen_rec
1456    
1457    checkpoint62u (2011/03/15)
1458    o model/src:
1459      - for the adjoint, change NonLin-FreeSurf initialisation sequence: fill-in
1460        h0Fac from INITIALISE_FIXED and reset hFac to h0Fac in INITIALISE_VARIA ;
1461      - in initialise_varia.F (except for ALLOW_DEPTH_CONTROL) remove 2nd call to
1462        INI_DEPTHS, INI_MASKS_ETC & INI_LINEAR_PHISURF.
1463    o pkg/ctrl/obcs/ecco:
1464      - remove obsolete, unused, and partially broken code:
1465        ctrl_obcsvol/ctrl_obcsbal/ctrl_volflux and code within
1466        ALLOW_CTRL_OBCS_BALANCE
1467      - put a stop statement into ecco/cost_obcsvol.F, but also add
1468        cost_obcsvol to ecco_ad_diff.list
1469    o pkg/ecco: fix counting cost function contributions for obcs (code
1470      by Matt M.) and diffkr for diagnostics
1471    o pkg/ecco, pkg/ctrl, pkg/grdchk:
1472      add cost penalty terms for initial uvel, vvel, eta controls
1473      and I/O for prior error files
1474    o pkg/mdsio:
1475       move mds_check4file.F from eesupp/src to mdsio_check4file.F ; add option
1476       (new argument) to check for tiled file in mdsioLocalDir : this fix the
1477       restart from pickup_som , pickup_dic (& dic_co2atm) with mdsioLocalDir.
1478    o pkg/ctrl:
1479     - ctrl_obcsbal.F, ctrl_obcsvol.F: replace last calls of ctrl_getrec by
1480       ctrl_get_gen_rec, put a stop statement into ctrl_getrec. Remove
1481       unused and superfluous variables
1482     - ctrl_get_gen_rec.F: catch the case of xx_genperiod=0.
1483    o pkg/ecco
1484     - enable adjoint of Stevens OB
1485    o pkg/ctrl/ecco/grdchk:
1486      - remove global declaration of tmpfldx/yz and tmpfldx/yz2.
1487        Fortunately, we do not have any tests for the numerous cpp-flagged
1488        option of "obcs as control parameters" so we will never know
1489        if this is an improvement (but at least now things compile).
1490      - remove an obsolete initialization from ecco_cost_init_barfiles.F
1491      - fix some problems within never used ifdefs to make the code compile
1492    o pkg/obcs:
1493     - Refine Interior mask definition to work with more complex OB (e.g.
1494       if OB_Ie < OB_Iw); In case default setting is not sufficient, allows to
1495       read in Interior mask from file. Check if Interior mask is consistent
1496       with OB list of indices.
1497    o pkg/seaice
1498     - beginning code for a seaice tracer package,
1499       but currently only used for seaice age: SEAICE_AGE
1500       SEAICE_num = 4
1501       iTracer = 1: area-weighted ice age
1502               = 2: volume-weighted ice age
1503               = 3, 4: template for one-year vs. multi-year ice
1504       data.seaice has new namelist SEAICE_PARM03 for arrays related to
1505       SEAICE_num
1506    
1507    checkpoint62t (2011/03/05)
1508    o pkg/obcs:
1509     - obcs_apply_uv.F: change to a 2 steps method, first tangential component;
1510       then normal component. This ensures that the normal component is set
1511       correctly even when it conficts with tangential setting from an other OB.
1512       Affects results of test-experiment seaice_obcs: update the output.txt
1513    o pkg/obcs:
1514     - add code to monitor statistics of dynamical fields at OB.
1515     - take OBCS_BALANCE code out of obcs_calc.F into new S/R OBCS_BALANCE_FLOW :
1516       - fix to OBCS_BALANCE code (right hFac ; deal with simple OB intersection).
1517       - change default: balance the Net inflow through all OB (instead of balancing
1518         each OB separately); keep the old method if setting OBC_balanceFacX < 0.
1519     - switch on useOBCSbalance in dome experiment: only correct Western OB outflow
1520       to match Nortern OB inflow (OBCS_balanceFacN=0).
1521    o pkg/seaice:
1522     - redefined actual sea ice age to be ICEAGE/HEFF ifdef SEAICE_AGE_VOL
1523    o pkg/seaice (seaice_growth v 1.113):
1524     - reverting seaice_growth to v 1.111 in order to have code with exact bit
1525       compatibility with MITgcm_contrib/ifenty/Fenty_seaice_thermo_code_merge
1526       CPP option SEAICE_OCN_MELT_ACT_ON_AREA removed in v 1.112 is reintroduced
1527       runtime flag SEAICEareaFormula is kept but is inactive
1528    o model/src:
1529     - add new param to scale curvilinear grid distance and area when using
1530       a different sphere radius from the grid-files.
1531     - test/check multi-threads EXCH applied to local variable (cg2d_x)
1532    o adjoint:
1533     - enable adjoint of Stevens OB
1534     - add dummy_in_dynamics to enable extraction of ADJrhoinsitu
1535       (a bit delicate because of potentially modified adj. common block structure;
1536       current switch is ALLOW_AUTODIFF_MONITOR_DIAG, could be changed later)
1537    
1538    checkpoint62s (2011/02/15)
1539    o pkg/seaice (seaice_growth v 1.112):
1540     - introduce SEAICEareaFormula run time parameter, which selects the recipe for
1541       computing the ice cover tendency from effective thickness tendencies. Include
1542       Ian Fenty's formula.
1543     - remove 'undef SEAICE_OCN_MELT_ACT_ON_AREA' which may now be achieved using
1544       SEAICEareaFormula.
1545     - simplify notations for the various d_HEFF/d_AREA terms.
1546    o pkg/gmredi:
1547     - add Boundary-Value-Problem bolus transport (Ferrari etal, OM 2010) code
1548       from Christopher Wolfe (UCSD); add partial cell factor in vertical derivative;
1549       add a verification test-run (front_relax.bvp) to test GM_useBVP.
1550    o pkg/seaice (seaice_growth v 1.111):
1551     - for SEAICE_DO_OPEN_WATER_GROWTH, replace Gael's implementation with Ian's.
1552     - the new SEAICE_DO_OPEN_WATER_MELT allows open-water air-sea heat fluxes to
1553       also melt ice.
1554    o pkg/seaice:
1555     - McPhee formula for Ice-Ocean fluxes (provided by Ian Fenty).
1556     - can be used by #define MCPHEE_OCEAN_ICE_HEAT_FLUX in SEAICE_OPTIONS.h
1557    o pkg/cheapaml:
1558     - from Nico Wienders: New version of this package.
1559    o pkg/flt:
1560     - add CPP options to prevent floats to re-enter the opposite side of
1561       a periodic domain (default: keep periodicity)
1562    o pkg/gmredi:
1563     - apply exchange to GM_PsiX,GM_PsiY to get valid values near CS-corners
1564       (needed for multi-dim advection).
1565     - switch on GM Advective form in global_ocean.cs32x15 and update output.txt
1566    o model/src:
1567     - fix wrong re-setting of addMass array (ALLOW_ADDFLUID) for atmospheric run.
1568    o tutorial_tracer_adjsens
1569     - extend to NLFS and replace maskC by hFacC
1570       (change reference output accordingly)
1571    
1572    checkpoint62r (2011/01/24)
1573    o testreport:
1574     - add option -deloutp (-do) to remove output file after successful run
1575     - add option -mfile (-mf) for MPI machile-file and for each test-exp,
1576       extract exact list of procs from this file ; adjust COMMAND by
1577       replacing TR_MFILE & TR_NPROC with local machile-file & Nb of MPI procs.
1578    o pkg/ecco: replace old ineffective way of penalizing deviations from
1579      first guess (of obcs) with code by Matt Mazloff
1580    o pkg/ctrl: add code that allows the use of ALLOW_OBCS?_CONTROL without
1581      exf/cal
1582      - ctrl_init: fix initialisation (computation of diffrec) for obcs-ctrl
1583        and handle case of obcs?period == 0
1584        Not affected by these changes: There is still an inconsistency in
1585        the computation of start/endrec for the obcs variables for ALLOW_CAL
1586        defined (see comment by Menemenlis, 7-Mar-2003)
1587      - make S/R ctrl_get_gen_rec return something meaningful even if
1588        ALLOW_CAL is not defined
1589      - ctrl_getobcs?: simplify code so that it does not need to use
1590                       S/R exf_swapfields
1591    o testreport:
1592       allow to test MPI with different number of processors for each experiment:
1593       create file "SIZE.h.mpi" in each build dir.
1594       Note: update of "-command" argument not yet implemented.
1595    o model/src, pkg/autodiff, pkg/ecco, pkg/seaice:
1596      alleviate the need for additional 3D tapes when using
1597      the non-inear free surface in the adjoint. This is done
1598      by adding an 'update' of hfacc etc. to their current
1599      value at the beginning of forward_step.F.
1600    o pkg/seaice
1601      seaice_lsr: move stress-divergence computations out of outer pseudo-
1602      timestepping loop
1603    o pkg/obcs/obcs_prescribe_read.F: move 'CALL OBCS_EXTERNAL_FIELDS_LOAD'
1604      up, so that the calls of the ctrl_* subroutines are really at the end
1605      of the routine.
1606    o pkg/gmredi:
1607      allow to specify a 2-D horizontal map and a 1-D vertical profil
1608      as scaling factor for Isopycnal diffusivity (Redi) and GM diffusivity.
1609    o pkg/seaice:
1610      move lsr iterations from seaice_dynsolver to seaice_lsr.
1611    o pkg/seaice:
1612      reduce memory footprint of seaice mutldim advection tapes,
1613      by using a 2D tape independent of the generic_advdiff ones,
1614      and setting GAD_AREA=1 etc. rather than GAD_AREA=101 etc.
1615    
1616    checkpoint62q (2010/12/29)
1617    o model/src:
1618      - check horizontal grid-spacing for unset or zero/negative values.
1619      - change AD test hs94.1x64x5 to be truly a 2-D set-up.
1620    o pkg/flt:
1621      - use (recent) mdsio S/R MDS_READVEC_LOC instead of local FLT_MDSREADVECTOR
1622      - precision of input and output files set according to readBinaryPrec
1623        and writeBinaryPrec (previously always 64.b), pickup remains at 64 bits.
1624      - initial float position from tiled file was not converted to index space
1625        (looks like a bug): fixed to make it similar to initial pos. global file.
1626    o global_ocean.cs32x15:
1627       change SIZE.h of AD set-up to get same tiling as with MPI.
1628       Update output_adm, output_adm.thsice (pass@14) & output_adm.seaice (fail@11)
1629    o model/src:
1630       add flag to control printing of domain fields (bathymetry, hFac ...) in
1631       ini_mask_etc (call to plot_fieds_xy*).
1632    o pkg/thsice:
1633       if useEXF, some forcing fields are not valid in overlap: fixed by computing
1634       over the interior only + apply EXCH at the end (like with SEAICE advection).
1635    o pkg/mdsio:
1636      - add 2 arguments to S/R MDS_PASS_R4/8toRL/S for overlap size of buffer
1637        to copy to/from, so that it can be used to replace MDS_PASS_WH_R8toRL/RS.
1638      - change barrier call for safe multi-threads access to 3-D shared buffer.
1639      - MDS_READ/WRITEVEC_LOC use buffers from MDSIO_BUFF_3D.h (instead of local ones)
1640      - replace call to MDS_PASS_WH_R4/8toRL with call to MDS_PASS_R4/8toRL and
1641        remove the 4 S/R MDS_PASS_WH_R4/8toRL/S.
1642    o pkg/flt:
1643      - add fourth-order Runge-Kutta integration
1644      - add basic exch2 support (only 1 facet supported so far!)
1645    o pkg/mdsio+rw:
1646      new S/R to read local (or tile independent) vector (read counterpart of
1647       mds_writevec_loc, and front-end write_glvec_rl/rs).
1648    o global_ocean.cs32x15: additional input_ad.seaice experiment
1649        that uses pkg/seaice rather than pkg/thsice.
1650        (using multidim advection for seaice)
1651    o towards more F95 syntax for array specification in namelist:
1652      - change "data.diagnostics" (data.ptracers was changed before checkpoint62p)
1653        of all verification experiments.
1654           e.g.:    line: fields(1,3)='ETAN    ','ETANSQ  ',
1655          was changed to: fields(1:2,3)='ETAN    ','ETANSQ  ',
1656      - finish adding "-DNML_EXTENDED_F77" to DEFINES list in pgf77 and g77 optfiles
1657    o global_ocean.cs32x15: additional input.seaice experiment
1658        that uses pkg/seaice rather than pkg/thsice.
1659    
1660    checkpoint62p (2010/12/17)
1661    o pkg/thsice: rename (ad tape index) iicekey as ticekey, and move it
1662        to THSICE_SIZE.h to avoid conflict with pkg/seaice.
1663    o pkg/seaice: add seaice_diffusion.f seaice_map_thsice.f to adjoint.
1664        allow for use of multim. advection in seaice adjoint.
1665    o pkg/seaice: add diagnostics for snow precipitation and sublimation flux
1666      - first attempt to close budgets by taking into account the freshwater
1667        flux implied by the sublimation of snow and ice. So far only the
1668        volume budget is closed, turn on with soon-to-be-retired-again CPP-Flag
1669        SEAICE_ADD_SUBLIMATION_TO_FWBUDGET
1670    o eesupp/src:
1671      new S/R with new option (NML_EXTENDED_F77) to change array specification
1672      from F95 standard to commonly accepted extended F77 form.
1673      This would allow to use F95 syntax in namelist (needed with gfortran 4.4.5)
1674      and to revert back to the original syntax (with -DNML_EXTENDED_F77)
1675      for less tolerant f77 compiler (e.g., pgf77, g77).
1676    o globalFiles:
1677      commented out in parameter file "data" since it's not safe with MPI
1678      (e.g., wrong on aces); keep it if useSingleCpuIO=T (but not doing much
1679      in this case); no longer commented out in restart test (tst_2+2).
1680    o add adTapeDir to specify a special directory where adjoint tapes are
1681      written/read (adread_adwrite.F). adTapeDir is specified in data/PARM05
1682      and cannot be used together with mdsioLocalDir.
1683    o nesting pkgs:
1684      - packages_init_variables : put call to OBCS_INIT_VARIABLES in last position
1685      - update Gianmaria's Nesting pkgs (from Contrib/nesting_sannino)
1686      - add parameter files + utils dir + output from short run on beagle.
1687    o pkg/seaice:
1688        fix seaice_growth.F store directives; update results of exp. lab_sea.ad
1689    o pkg/seaice: explicitly store tsurfloc in seaice_solve4temp.F to avoid
1690      unnecessary copying in adjoint code, requires new parameter NMAX_ITER
1691    
1692    checkpoint62o (2010/11/25)
1693    o pkg/exf:
1694      - change CPP option EXF_VERBOSE to run-time logical param exf_verbose.
1695    o pkg/seaice:
1696      - seaice_ocean_stress: split a loop for better vectorization of the
1697        adjoint code
1698      - seaice_growth.F: fix bug in conservation of freshwater connected to
1699        capping of heff, put contribution into d_HEFFbyNEG
1700      - replace irritating parameters SEAICE_latentWater/Ice and SEAICE_sensHeat
1701        by something more sensible (parameters that are what their name implies)
1702      - change some defaults, so that by default exf-parameters are used for
1703        things like rhoAir, cpAir,latent/sensible heat parameters, in order
1704        to reproduce the old results, many data.seaice now contain funny values
1705        for cpAir and latent heat of sublimation
1706    o packages_readparms.F: move exf_readparms up in line so that
1707        exf-parameters are visible for other packages (e.g. seaice)
1708    o debugMode & debugLevel=2:
1709      - differentiate between debugMode & debugLevel=2:
1710        debugMode: controls printing of debug messages (sequence of S/R calls).
1711        debugLevel: controls printing of algorithm intermediate results and stats.
1712      - remove "if debugLevel=2 => debugMode" but keep "debugMode =>  debugLevel=2";
1713        => allows to print debug-stats without all sequence of call messages.
1714      - switch control of debug print from debugLevel to debugMode in many S/R.
1715    o pkg/obcs (obcs-sponge):
1716        fix bug that was introduced on Oct 25 (in dynamics.F v1.151): put back the
1717        call to OBCS_PRESCRIBE_EXCHANGES (need to exch gU,gV when using obcs-sponge)
1718  o pkg/generic_advdiff:  o pkg/generic_advdiff:
1719    - record overlap minimum size for each advection scheme;    - record overlap minimum size for each advection scheme;
1720    - refine criteria on overlap minimum size;    - refine criteria on overlap minimum size;

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