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revision 1.1539 by jmc, Wed Nov 30 15:43:29 2011 UTC revision 1.1694 by jmc, Mon Jul 23 23:27:10 2012 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o verification (adjoint exp):
8      - reduce length of simulation by half for experiment global_ocean.cs32x15
9        (std, seaice & seaice_dynmix) and exp tutorial_dic_adjoffline; update output.
10    o pkg/mom_common (mom_u/v_bottomdrag), pkg/shelfice (shelfice_u/v_drag)
11      - replace if statements KE.ne.0 with KE.gt.0 to avoid sqrt of negative numbers
12        of KE that can occur with aggressive optimization
13      + put quadratic bottom drag calculation in separated loops (only done if
14        using bottomDragQuadratic)
15    o model/src: CG2D_NSA
16      - clean-up:  stop if cg2dNormaliseRHS=T and AUTODIFF
17         and replace GLOBAL_SUM calls with GLOBAL_SUM_TILE.
18      - in test-exp that uses CG2D_NSA (bottom_ctrl & tutorial_tracer_adjsens),
19         change cg2d residual target to be expressed in Wunits (=> do not normalise
20         RHS ; this fix global_max Pb with TAF); update output.
21    o verification/tutorial_tracer_adjsens:
22       improve parameter consistency (and get rid of warnings):
23       - use deltaTFreeSurf=deltaTtracer (better with NonLin FreeSurf);
24       - switch Temp Adv Scheme from 81 to 80 (no limiter since theta < 0 is physical)
25       - use staggerTimeStep (for stability) in som81; use default rotation period.
26    o pkg/exch2:
27      - with empty facet: fix compact-format (W2_mapIO=1) definition (was previously
28        reset to 0 = 1 long line in X)
29    o pkg/mdsio:
30      - fix reading of dimensions from meta file for large-size domain
31    o model/src:
32      - fix saltIsActiveTr setting for IdealGas eosType (eosType is 6 character long);
33      - to refine CS-grid check, add logical flag "hasWetCSCorners": true if using
34        Cubed-Sphere Exch with CS-corners inside the domain;
35        make new S/R INI_GLOBAL_DOMAIN from code in ini_linear_phisurf.F to calculate
36        globalArea and to set hasWetCSCorners.
37      - add warning if usingCurvilinearGrid and momAdvection in flux-form (missing
38        metric terms); stop if hasWetCSCorners=T and momAdvection in flux-form.
39      - re-activate the stop if useCDscheme and hasWetCSCorners=T (previously if
40        useCDscheme and useCubedSphereExchange).
41    o pkg/seaice/seaice_growth.F :
42      - compute the SEAICE_DISABLE_HEATCONSFIX term accordingly
43        for the (.NOT.useRealFreshWaterFlux).OR.(nonlinFreeSurf.EQ.0)
44        when the previous code was not correct.
45      - in all cases diagnoze the boundary condition mismatch to SIaaflux
46      - in the case of useRealFreshWaterFlux.AND.(nonlinFreeSurf.GT.0) add
47        that term to QNET (essentially to set the melt/freeze water to 0degC).
48        when SEAICEheatConsFix is true, so that the ocean+ice budget heat is closed.
49    o verification/global_ocean.cs32x15/input.seaice :
50      - add SEAICEheatConsFix in data.seaice, ensuring closed ocean+ice heat budget.
51      - add diagnostics (commented out) for budget test using my matlab codes (gcmfaces).
52      - update results (output.seaice.txt) accordingly.
53    o verification/lab_sea/input/data.seaice :
54      - remove SEAICEheatConsFix, which is now be tested
55        in global_ocean.cs32x15. The presently coded fix
56        is only consistent with real fresh water + nlfs.
57      - update results (output.txt) accordingly.
58    o pkg/salt_plume: added diagnotic for salt tendency (oceSPtnd).
59    o AD_CONFIG.h file:
60      - in genmake2: remove "#undef ALLOW_ECCO_OPTIMIZATION" from AD_CONFIG.h;
61      - remove #include "AD_CONFIG.h" from all included OPTIONS files and
62        add it explicitly in each fortran src file where it is needed.
63        motivation: header file AD_CONFIG.h is generated/modified after "make depend"
64        thus introducing potentially wrong dependency; therefore, better to include
65        it only where it's really needed, and after any other included OPTIONS file
66        (less tempting to bring conditional includes according to ALLOW_ADJOINT_RUN
67        or ALLOW_TANGENTLINEAR_RUN).
68    
69    checkpoint63p (2012/07/06)
70    o pkg/autodiff:
71      - rename S/R INI_AUTODIFF to AUTODIFF_INIT_VARIA ;
72      - create new header file "AUTODIFF_PARAMS.h" for pkg/autodiff parameters
73        which are now read from new parameter file "data.autodiff" (inAdExact
74        previously in "data", use{KPP/GMRedi/SEAICE}inAdMode previously in data.pkg)
75      - add file "data.autodiff" in all verification/*/input_ad/ directories.
76      - add run-time parameter to turn On/Off SEAICEuseFREEDRIFT in adjoint/forward
77        mode (used in global_ocean.cs32x15.seaice_dynmix test exp.)
78    o verification/tutorial_tracer_adjsens/
79      - add extra sub-verification which uses "SOM" advection scheme
80        (2nd Order-Moment Advection Scheme, Prather Limiter) with
81          #define GAD_ALLOW_TS_SOM_ADV in GAD_OPTIONS.h
82        and in data:
83          multiDimAdvection=.TRUE.,
84          tempAdvScheme=81,
85          saltAdvScheme=81,
86    o model/src:
87      - introduce ALLOW_BALANCE_RELAX which allow the removal
88       of the global mean of relaxation terms by setting
89       balanceThetaClimRelax and balanceSaltClimRelax
90      - disable balanceEmPmR and balanceQnet in the case when useSeaice.
91       This case is now treated appropriately in seaice_growth.F
92    o pkg/seaice:
93      - do balanceEmPmR and balanceQnet based on the net fluxes
94        (SItflux) that enter the ocean+ice system rather than QNET
95        and EMPMR. Works best in real fresh water.
96      - SIatmFW, SIatmQnet, and SItflux computations had to be moved
97        out of the diagnotics bloc, and stored in global arrays.
98    
99    checkpoint63o (2012/06/29)
100    o vertical mixing schemes:
101      - remove unused S/R CALC_BUOYANCY (left from branch-atmos merging)
102      - replace computation of density (in Function STATE1, opps_calc.F) by a call
103        to S/R FIND_RHO_SCALAR
104      - pass sigmaR to S/R PP81_CALC, MY82_CALC (but not yet used) and to GGL90_CALC
105        and use it for N^2 calculation in ggl90_calc.F (save 2 density computations);
106        affects output (vermix.ggl90) at truncation level.
107    o testreport:
108      - change adjustment of SIZE.h for mpi+mth testing: preserve enough tiles
109        (nSx,nSy) for the number of threads (from eedata.mth)
110    o model/src:
111      - remove 2nd set of calls at the top of initialise_varia.F (Adjoint part)
112        related to Non_Lin Free-Surf or Bottom-Control (but not longer necessary).
113    o verification/tutorial_tracer_adjsens/
114      - compile with ALLOW_CG2D_NSA
115      - run with nonlinFreeSurf=3
116      - update reference output_adm.txt
117    o tools/genmake2:
118      - add "-DHAVE_NETCDF" to the DEFINES list when NetCDF is available ;
119        refine usePROFILES switching off (only when NetCDF is not available).
120    o verification (atmospheric set-up):
121      - change eosType='IDEALGAS' to eosType='IDEALG' to match variable declaration
122    o pkg/profiles : refine profiles and files handling.
123    o model/src and pkg/ecco : introduce run-time switch usePROFILES.
124    o model/src/the_main_loop.F, forward_step.F and pkg/exf/EXF_OPTIONS.h :
125      - changes to use model/src/the_main_loop.F rather than the ecco version
126        in ecco type adjoint runs.
127    o model/src:
128      - move computation of recip of grid distance & area from INI_MASKS_ETC to INI_GRID
129      - move setting of h0Fac[C,W,S] from INI_LINEAR_PHISURF to INI_MASKS_ETC
130      - update_masks_etc.F: rename SMOOTH*_R4,R8 function to the corresponding type (RS,RL)
131    o model/src:
132      - fix S/R UPDATE_CG2D for ALLOW_DEPTH_CONTROL case (was empty before);
133        update output of test experiment bottom_ctrl_5x5.
134    o pkg/generic_advdiff:
135      - implement vertical bi-harmonic diffusion (for now, only for T & S and
136        only explicitly).
137    o verification/bottom_ctrl_5x5/
138      update reference output (results changed quite some time ago,
139      not sure when; but new reference results look ok in terms of grdchk)
140    o verification/1D_ocean_ice_column/
141      For verification purposes, the exact adjoint rather than an approx.
142      should be used (e.g., to comare against F.D. or TLM).
143      removed autodiff_inadmode*_ad.F routines in code_ad/
144      Update results/ accordingly.
145    o pkg/cal:
146      - change cal_getdate.F so that output date is function of input time only
147        (less ambiguous, not mixed up with input iteration number).
148      - fix calendarDumps for non-zero phase-lag (S/R CAL_TIME2DUMP).
149    o pkg/diagnostics:
150      - implement calendarDumps also for stats-diags
151      - implement calendarDumps also for snap-shot output (negative freq)
152      - for now, ignores calendarDumps if non-zero phase-lag.
153    
154    checkpoint63n (2012/06/04)
155    o model/src:
156      - recompute rSurfW & S to ensure consistent column thickness (needed for rStar)
157        between Sum_k(hFac*drF) and rSurf-rLow, for now only when using pkg/shelfice;
158      - use h0FacC, W & S to compute hFac_surfC, W & S in calc_surf_dr.F (more
159        similar to calc_r_star.F); update results of experiment internal_wave and
160        tutorial_global_oce_in_p (affected @ truncation level).
161    o pkg/shelfice:
162      - add parameterisation of advective-diffusive flux into the ice shelf
163        according to Holland and Jenkins (1999), eq.22-33, as suggested by Jan De Ryd
164      - simply eps3/3a computation
165    o eesupp:
166     - add new CPP option (DISCONNECTED_TILES) to disconnect tiles (no exchange
167       between tiles, just fill-in edges assuming locally periodic subdomain) and
168       add corresponding exchange subroutines (EXCH0);
169     - new CG-solver version (_EX0) for disconnected-tiles special case.
170    o model/src (CG-solvers):
171     - modify Single-Reduction version (CG2D_SR) in case cg2dMaxIters is reached
172       (similar final residual output and max-Iter number as with standard version);
173     - allows to store and use lowest-residual solution (standard & _SR versions);
174     - cleaning up (remove old, commented out code, LETS_MAKE_JAM ...).
175     - by default, also compile CG2D_SR version (define ALLOW_SRCG in CPP_OPTIONS.h)
176    o eesup/src:
177     - global_vec_sum.F cleaning: add a BARRIER ; update comments ; remove ndef
178       ALWAYS_USE_MPI (no longer needed after fixing usingMPI settings - March 2012)
179    o pkg/salt_plume added to lab_sea/input_ad.noseaicedyn
180    
181    checkpoint63m (2012/04/27)
182    o pkg/shelfice:
183     - account for partical cells in surface level below ice-shelf for hydrostatic
184       pressure calculion (set uniformFreeSurfLev to F); update isomip experiments.
185    o ad test experiments:
186     - update and rename to "ad_optfile.local" local AD-optfile specific to a
187       particular adjoint verification experiment (in verification/*/code_ad/)
188    o pkg/seaice & pkg/exf:
189     - Part two of ECCO-CLIVAR code merges.
190       Completes merge of seaice area relax. code.
191       Requires unified CPP option EXF_ALLOW_SEAICE_RELAX
192       to be set in EXF_OPTIONS.h since this pkg controls its I/O
193       (and avoids second CPP option in SEAICE_OPTIONS.h)
194     - change default value of costIceStart & costIceEnd to a valid date.
195     - add snowPrecip to HSNOW in seaice_growth
196    o pkg/ptracers:
197     - move ptracers summary and setup check into separated S/R ; add a check for
198       valid PTRACERS_Iter0 value (error+stop or just warning).
199    o pkg/cal (+ pkg/ecco):
200     - avoid calling a S/R with 2 times the same arg (FWD: unless both are only used
201       as input; and for AD, unless both are not differentiable (e.g., k index)).
202    o model/src:
203     - define internal flag "uniformFreeSurfLev" (=T when free-surface level-index
204       is everywhere k=1) to speed-up some calculations (by pass kSurf reference);
205       temporary set to usingZCoords value (to be changed to F when using shelfice).
206     - hydrostatic pressure: implement partial cell near the surface also for
207       Z-coordinates (for the case where uniformFreeSurfLev=F); replace test on
208       usingZCoords with test on uniformFreeSurfLev where needed (in NonHyd code).
209    o pkg/ctrl/ctrl_init.F:
210     - add a formal parameter to s/r ctrl_init_rec to print
211       xx_$(ctrl_valiable)_file for easier debugging
212     - move call of cal_* routines into the if-block where they are really
213       needed so that xx_$(ctrl_variable)_period can be 0 or -12 without having
214       to specify a startdate
215    o pkg/seaice:
216     - update comments in SEAICE_OPTIONS.h (+ similar update of lab_sea/code and
217       global_ocean.cs32x15/code versions).
218     - turn on seaice Multi-category (in data.seaice, SEAICE_multDim=7) for
219       verification experiment global_ocean.cs32x15.seaice and update results.
220    o pkg/exf:
221     - new S/R EXF_GETFIELD_START to return starting-time of a forcing field
222       (according to useExfYearlyFields).
223    o pkg/cal:
224     - move calendar setting & summary (previously in cal_readparams.F) into new
225       S/R CAL_INIT_FIXED to be called later in the initialisation process, once
226       length of the simulation is set (after SET_PARMS call); This is an attempt
227       to fix Pb when, e.g.: pkg/longstep, modifies the length of the run.
228     - For safety: keep a record of pkg/cal parameter settings status
229               to allow to STOP if one pkg/cal S/R is called too early.
230     - add a stop in all basic pkg/cal subroutines if called before setting is done.
231     - modify cal_getdate.F: stop when nothing was returned;
232       if called with myIter=-1, simply retrun modelBaseDate (1,2 = startDate_1,_2);
233       this allows to remove "cal.h" from seaice_read_parms.F & init_mnc_vars.F.
234    
235    checkpoint63l (2012/04/04)
236    o pkg/bbl:
237      - fix call to FIND_RHO_2D in bbl_calc_rho.F (case multi-tiles per proc);
238        update global_with_exf output.yearly.txt file.
239    o pkg/cal:
240      - start to clean-up cal_set.F ; fix for the case where baseTime is non-zero.
241      - remove 2 unsused and very short (1 line only) functions ;
242      - remove unsused subroutines from AD-Diff list.
243    o model/src:
244      - start to implement clean wait to stop in initialization S/R (config_check.F,
245         packages_check.F, ini_parms.F and pkg/obcs/obcs_check.F + pkg/mypackage)
246    o folowing PRINT_MESSAGE changes:
247      - remove reminder multiple print to the same file (STDOUT) when multi-threads.
248    o pkg/bbl:
249      - modification so it can work with z*
250      - replace deltaT with dTtracerLev(k) for asynchronous time stepping
251      - global_with_exf/input.yearly verification; changes output.yearly.txt
252    o eesupp/src:
253      - PRINT_MESSAGE: use OpenMP critical instruction (similar to PRINT_ERROR);
254        writing to unit 0 (if unit=errorMessageUnit) extended to the case myThid=1
255      - CHECK_THREADS: specific code if using OpenMP threading: improve checking of
256        # of threads across processors (e.g., different env OMP_NUM_THREADS setting)
257      - improve special preliminary call to EESET_PARMS (if eedata is read 2 times).
258      - when using MPI, always set usingMPI=T ; set default accordingly and stop
259        if not consistent.
260      - ALL_PROC_DIE: add a BARRIER after MPI_FINALIZE call ; skip this when thread
261        argument is zero (in case called within single-thread section).
262    o pkg/fizhi:
263        clean-up turbulence cold-start switch: decided in fizhi_init_vars.F, stored
264        in common bloc (fizhi_coms.h) and then passed as argument up to S/R TURBIO.
265    o pkg/exch2:
266      - add argument "updateCorners" to S/R exch2_get_uv_bounds (enable to
267        activate EXCH_IGNORE_CORNERS in vector EXCH S/R).
268      - switch 1rst EXCH call to IGNORE_CORNERS (instead of UPDATE_CORNERS)
269        but keep the 2nd with UPDATE_CORNERS: this prevents overwriting good data
270        with bad ones coming from a not-yet-updated halo.
271        This should fix the problem when sNx <> sNy and GCD(sNx,sNy) < 2*Olx.
272    o pkg/frazil:
273        move FrzForcT diag from frazil_diagnostics_state.F to frazil_calc_rhs.F
274        http://mitgcm.org/pipermail/mitgcm-devel/2012-March/005384.html
275    o model/src/config_check.F: add a check for OLx>sNx/OLy>sNy
276    o verification/lab_sea
277      * #undef SEAICE_EXCLUDE_FOR_EXACT_AD_TESTING
278      * #define ALLOW_SST_CONTROL & ALLOW_SST_CONTROL
279      * nTimeSteps 3 -> 4
280      * changed reference output accordingly
281    o pkg/ctrl:
282      * fix ctrl_get_gen for xx_sst, xx_sss
283    o pkg/fizhi:
284      - fix 2 calls to S/R GRD2MSC (argument igrd) in update_earth_exports.F
285        update results of exp. fizhi-cs-32x32x40 (fail with only 6 digits for cg2d)
286      - by default, use new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE);
287        fix few out-of-bounds indices in referencing vars (initialise igrd to 1);
288        clean-up fizhi_turb.F (remove unused & uninitialised qdiaglsm array).
289    o pkg/gmredi:
290      - add diagnostic of Redi (main diagnonal) vertical diffusive flux of Temp
291    o pkg/fizhi:
292      - fix few initialisation and multi-tile Pb: aqualev & gridalt now pass the
293        (old)aces open64 tuv test.
294    o pkg/icefront: fix bug and reorder loop in icefront_init_varia.F
295    o pkg/mom_vecinv:
296      - fix 1 loop range in mom_vecinv.F to be like all the other loops which
297        set/update gu,gv/Diss (fix Pb of uninitialised fVerUkp in admom_vecinv
298        with non-lin free-surf).
299    o model/src: move k-loop outside of i/j-loops when (re-)computing R_low
300      in ini/update_masks_etc.F in order to avoid -O3 optimization problems with
301      some compilers (gfortran 4.6.0 on MacOS)
302    o momentum:
303      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
304        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
305        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
306    
307    checkpoint63k (2012/03/17)
308    o model/src:
309       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
310         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
311       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
312         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
313    o model/src: solve_*diagonal.F
314       - replace division with multiplication by inverse (similar to original version)
315         update output of AD exp. global_ocean.90x40x15.
316       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
317         to enable the use of the vectorized & differentiable solve_tridiagonal.F
318       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
319         vertical advection (to get solve_tridiagonal tested in AD mode).
320    o pkg/seaice: ECCO-CLIVAR merge:
321      1. seaice AREA relaxation
322         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
323         * runtime flag: SEAICE_tauAreaObsRelax
324      2. modified global mean cost imbalance code: CPP option
325          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
326    o another iteration on solve_*diagonal.F
327       Make choices independent of AUTODIFF
328       Default will be the adjoinable vectorized version.
329       Alternative choices are:
330       * non-adjoinable original version with low memory footprint:
331         #define SOLVE_DIAGONAL_LOWMEMORY
332       * still adjoinable but does not vectorize (k as inner-most loop):
333         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
334    o testreport
335     - add option to use a home made wrapper around "make"
336     - remove MITGCM_IEEE env. variable (no longer active)
337    o pkg/shelfice
338     - improve computation of friction velocity for velocity dependent
339       exchange coefficients: include velocities into SHELFICEBoundaryLayer
340       block to average velocities vertically
341     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
342    o Modify diagonal solvers, now three versions (upon request):
343      #ifndef SOLVE_DIAGONAL_AUTODIFF
344        1. default version (dating back a while ago)
345      #else /* def SOLVE_DIAGONAL_AUTODIFF */
346      # ifdef SOLVE_DIAGONAL_KINNER
347        2. adjoinable version with k-innermost loop (G. Forget)
348      # else
349        3. adjoinable vectorized version of 2.
350      # endif
351      #endif /* SOLVE_DIAGONAL_AUTODIFF */
352      All flags are currently set within routines, but could/should be moved to CPP-options.
353      Array bounds for 1. are as before, for 2.,3. cover the entire domain
354      (could be changed for 1. too).
355    o verification/lab_sea (fwd):
356      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
357        use 7 categories (except hb87), new solve4temp params (except salt_plume),
358        constant salinity (=4) or variable salinity (salt_plume) done through
359        SItracer.
360    o pkg/seaice:
361      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
362      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
363         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
364        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
365        SEAICE_freeze got retired) but already better than previously with
366        SEAICE_freeze=123456.7 deg.C;
367      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
368        (safer multi-threaded setting); always set SEAICEuseEVP;
369      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
370        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
371        stop if multiple specifications for the same coeff; make sure default
372        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
373    o pkg/obcs:
374      - allow to switch to upwind 1rst order advection scheme for the advective
375        flux computation at the open-boundary; disabled for adjoint built.
376    o pkg/ptracers:
377      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
378      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
379      - add parameter to decide when to start a tracer; use internal flag to
380        know which tracer to step-forward; switch this internal flag at the top
381        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
382        for adjoint built.
383    o pkg/seaice:
384      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
385      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
386      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
387    o pkg/ecco:
388      - fix writing of output file DiagnosCost_ClimSalt/Theta
389        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
390    o pkg/seaice:
391      - add missing initialisation of COR_ICE array in dynsolver.F
392      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
393        compiled either way, and is tested in all exps (multidim was only tested
394        in lab_sea ad before).
395      - cosmetic change to prepare for future addition of ITD. no change to results.
396        no defaults change.
397      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
398      - by lack of adequate verification experiments, I further used custom versions
399        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
400        should be correct.
401      - avoid recomputations in ad.
402    o array initialisation in adjoint mode:
403      1) pkg/mom_common/mom_calc_ke.F:
404        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
405        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
406        part this initialisation is gone, resulting in Floating Point Exception
407        (caught by open64 compiler with debug option).
408      2) model/src/convective_weights.F
409        set output convectCount over the full array range (instead of doing
410        an update): this fix a similar issue when called within recomputation (adjoint)
411        which could by-pass the initialisation (normally done in the caller S/R).
412    o pkg/seaice:
413      - final version of turbulent flux params, as agreed at MIT ice meet:
414           SEAICE_mcPheePiston (default is ~ 0.000875)
415           SEAICE_mcPheeTaper (default is 0.)
416           SEAICE_frazilFrac (defualt is 1.)
417           SEAICE_mcPheeStepFunc (default is false)
418      - changes results at trunction error level
419      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
420    o added pkg/frazil:
421      - see frazil_description.tex for details
422      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
423    o pkg/shelfice/shelfice_thermodynamics.F
424      - fix exponents for velocity dependent exchange coefficients: change
425        from 2/3(=0) to 0.66666666666666667
426      - move computation of velocity dependent exchange coefficients into
427        separate loop, so that it applies to both thermodynamics
428      - move some divisions by constants out of loops
429    
430    checkpoint63j (2012/02/16)
431    o pkg/seaice:
432      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
433      - SItracer:  added run time params, and allow coupling to ocn salinity.
434    o pkg/seaice: remove (almost) all divisions by constants within loops
435      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
436      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
437      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
438      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
439    o pkg/seaice :
440      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
441        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
442      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
443      - add permanent SItflux diag that corresponds to TFLUX but includes
444        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
445      - allow activation/testing of a fix for suspected missing term in
446        ocn-ice heat budget (to be confirmed). To test this, you want to
447        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
448        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
449      - no change in results, fwd or ad.
450    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
451      - switch to variable freezing point.
452           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
453      - bug fix : the sublimation term that was missing is now activated.
454           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
455      - bug fix : flooding sign term for SIsal0.NE.0.
456           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
457    o pkg/seaice:
458      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
459        is now the default, and the old default constant freezing point is recovered
460        with SEAICE_tempFrz0    = -1.96,
461             SEAICE_dTempFrz_dS = 0.,
462      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
463      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
464      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
465        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
466      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
467        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
468      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
469        seaice_growth r149 for legacy branch (no results change).
470      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
471        from I. Fenty).
472      - results did not change except for global_ocean.cs32x15, mostly due to the
473        switch to variable freezing point (see above item for detail).
474    o pkg/thsice:
475      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
476        seawater freezing in thsice_calc_thickn (not used).
477    o pkg/seaice: turbulent flux term specification via run time params.
478      - replace CPP switches with run time switches to facilitate testing
479      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
480                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
481      - added runtime parameter : SEAICEturbFluxFormula
482      - move Mcphee constants to SEAICE_PARAMS.h
483      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
484                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
485                 remove seaice_summary call (moved to seaice_init_fixed)
486      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
487        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
488      - seaice_summary.F : add missing report of read turbulent flux term set up
489                           and SITRACER.
490      - seaice_check.F : check range; inform and stop if retired CPPs are used
491                         (incl. SEAICE_AGE).
492      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
493             CPP switch, same computation as before for the different options.
494      - change results at the truncation level.
495    o pkg/seaice:
496      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
497        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
498        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
499      - update verification/*/input*/data.seaice:
500        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
501        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
502        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
503        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
504    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
505      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
506        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
507        difference in results only due to machine truncation.
508      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
509        MaykutPolySatVap; keep MIN_LWDOWN.
510      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
511      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
512        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
513    o pkg/salt_plume:
514      - isolate saltPlumeFlux array exch into a specific S/R called from
515        do_oceanic_phys.F
516      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
517    o verification:
518      - move untested set-up to MITgcm_contrib/verification_other.
519    o pkg/seaice:
520      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
521    o pkg/seaice:
522      - seaice_solve4temp.F (keeping results unchanged):
523        * add 2 future run-time params to select which saturation vapor pressure
524          formula is used and how post-iteration fluxes are set.
525          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
526        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
527          the linearized expression to stay consistent with tsurf finding.
528      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
529        can be < 0.
530    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
531      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
532        conductive heat flux F_c , and add it explicitly when updating tsurf as
533        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
534        so that now F_ia has a consistent meaning through the entire routine.
535        This causes differences at truncation level: update output of fwd exp.
536        global_ocean.cs32x15.seaice.
537    o pkg/seaice:
538      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
539        of arrays, sign/direction of fluxes; no effect on results.
540      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
541        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
542        note: this should have been done before changing celsius2K default.
543      - to keep results unchanged, add back old value of celsius2K in verification
544        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
545      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
546        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
547        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
548        freezing temp is consistent with value in seaice_growth.F ; this causes
549        differences at machine truncation level: update lab_sea AD output (3/4).
550    o pkg/seaice:
551      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
552        and climsst/sss even when using seaice (to prevent calculation that might
553        use SST on land); does not affect any verification exp.
554      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
555        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
556    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
557      over land (non-legacy code)
558    o vectorize salt_plume package:
559      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
560      - this code computes plumebk everywhere (also over land), thus requires
561        code to avoid divisions by zero and catch the case of kLev=Nr.
562      - efficiency of salt_plume_frac is still sub-optimal
563    o tools (genmake2):
564      - fix makefile NAME specification (option: -makefile NAME) by adding
565        "-f $MAKEFILE" in few places where it was missing including makedepend
566        command (contribution from Paul).
567    
568    checkpoint63i (2012/01/24)
569    o model/src:
570      - add factorized versions of some EOS code to find_rho.F,
571        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
572    o model/src:
573      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
574      - change default celsius2K from 273.16 to 273.15
575      - to keep results unchanged, add back old value of celsius2K in verification
576        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
577         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
578    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
579      to make TAF generate vectorizable code
580    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
581       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
582       have flags that do this more efficiently.
583    o pkg/diagnostics/diagstats_calc.F
584      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
585    o pkg/obcs (with exch2):
586      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
587        and remove code (in obcs_readparms.F) which was based on EXCH of indices
588        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
589    o pkg/exf and seaice exp:
590      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
591        so that switching off area & heff advection flags does not affect results.
592      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
593      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
594        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
595        results of verification experiments: 1D_ocean_ice_column(fwd),
596        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
597        and offline_exf_seaice (all 4).
598    o pkg/seaice:
599      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
600        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
601      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
602        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
603        not multi-dim advection;
604      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
605        SHORTWAVE_HEATING #undef.
606    o optim: make Makefile more robust (?)
607    o pkg/obcs:
608      * fix treatment of obcs_read_pickup for TAF
609    o pkg/shelfice:
610      * add missing initialisation of num_shifwflx
611      * new adjoint verification exp. for isomip
612      * change Prandtl and Schmidt numbers from generic formulations
613        (in terms of model diffus. and visc.) to separate runtime
614        parameters, with Holland and Jenkins (1999) default values.
615    o pkg/exf (interpolation):
616      - extended input field (2 rows) near the N & S poles:
617        * fill in with the symetric value (when even Nb of data in longitude)
618        * add average value at the poles only for scalar quantities ; for vector
619          component interpolation, skip the averaging and keep duplicated values,
620          unless the 2 components have same location (uvInterp=T) in which case
621          interpolate the 2 components together using S/R EXF_INTERP_UV.
622      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
623        together: this allows to account properly for local orientation when
624        averaging at N & S pole.
625      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
626        exf-interpolation near N & S poles. Undef by default.
627      - add debug check/print on 1rst iter if debugLevel >=2.
628    o pkg/exf:
629      - change masking flags definition (no longer "parameter"), put them in
630        common block and set them in S/R EXF_INIT_FIXED.
631      - change recognized masking flag from s,u,v to c,w,s since the mask
632        to use (maskC,W,S) depends on position on model grid and has little to
633        do with scalar/vector difference; fix masking if using P-coordinates.
634      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
635        and update results of exp. global_with_exf (x2).
636      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
637    o pkg/obcs
638      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
639    o pkg/exf (interpolation):
640      - assume periodicity in X only if input field cover full longitude range.
641      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
642        and should vectorise).
643      - fix input lat of the 2 added row (in case we provide N.pole data).
644    
645    checkpoint63h (2011/12/30)
646    o pkg/seaice:
647      - change declaration of UVM from _RL to _RS in order to get B-grid
648        uIce,vIce monitor when _RS = real*4
649    o pkg/offline:
650      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
651      - compute vertical velocity if not read from file (switch on exactConserv
652        & staggerTimeStep);
653      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
654    o verification:
655      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
656        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
657        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
658      - update output of exp. global_ocean.cs32x15.viscA4 after changing
659        grid-file angles (used here for coriolis-3d);
660      - remove (or gzip) few files not needed to run fizhi-cs experiments.
661    o pkg/exf (vector interpolation):
662      - rotate vector component toward local grid-axis orientation using grid-angles
663        (stored in GRID.h) instead of locally computed rotation angle; keep old code
664        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
665    o pkg/seaice:
666      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
667        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
668    o pkg/PKG_OPTIONS.h files:
669      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
670        outside of the #ifdef ALLOW_THISPKG / #endif block.
671      - update verification/*/code/PKG_OPTIONS.h files.
672    o add a verification experiment (offline_exf_seaice/input.seaice) that test
673      the B-grid LSOR solver
674    o pkg/seaice: sort out emissivity and long wave radiation step 2:
675      - add emissivity for snow and ice as new run-time parameters
676        (unfortunately) that default to the corresponding exf values; this
677        changes results in most verification experiments so that for backward
678        compatibility these parameter have to be set explicitly to inconsistent
679        values (ugly);
680      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
681        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
682        until we agree how to handle this bug properly
683    o pkg/exf (interpolation):
684      - add a set of run-time param ({inputfield}_interpMethod), one for
685        each interpolated input field, to select the interpolation method
686        with a value of zero switching off the interpolation;
687      - print interpolation parameters to standard output;
688      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
689        (to use instead runoff_interpMethod=0 in data.exf).
690      - simplify default setting of interpolation parameters (for all fields,
691        set position to match model grid cell-center position, leading to trivial
692        interpolation in case of regular Lat-Lon grid) and fix for the case of
693        non-uniform delY.
694    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
695       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
696       this factor is absolutely required, because the lw exitance (= out-going
697       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
698       where the reflectivity rho = 1-emissivity for conservation reasons. Once
699       this is established, we can remove the CPP-Flag (if we want to).
700    o pkg/seaice:
701      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
702        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
703      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
704        what the name implies (and not emissivity*BoltzmannConstant), this means
705        the old default value of 5.5e-8 now means
706        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
707        S/R exf_readparms
708      - FV-discretization of the B-grid LSOR solver, turn on with
709        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
710        of the calling routine dynsolver, so that B and C-grid code look a
711        little more alike.
712      - fix index bugs in ostres.F (B-grid code)
713    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
714    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
715      default for SEAICE_emissivity, if useEXF; requires setting a wrong
716      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
717      backward compatiblity
718    o model/src: use sigmaR in calc_ivdc
719    
720    checkpoint63g (2011/12/16)
721    o pkg/seaice/seaice_growth.F:
722      fix heat conservation of the coupled ocean-seaice system.
723      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
724      solid vs liquid water treatment is resolved via QNET.
725    o pkg/seaice/seaice_growth.F:
726      add missing term for sublimation in saltFlux, which was breaking conservation.
727    o pkg/seaice/seaice_model.F:
728      Remove this patholigical case treatment in evolution branch,
729      where it is un-necessary and breaks conservation.
730      Update global_ocean.cs32x15/results accordingly for
731      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
732    o model/src:
733      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
734      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
735    o pkg/obcs:
736      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
737      tendency for temperature and salinity that is then applied to update
738      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
739      horizontal advection and diffusion contributions on the boundary (in
740      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
741      removing the mask in S/R timestep_tracer. The advantage of this approach is
742      that the updated tracer values include contributions from the surface
743      forcing and vertical diffusion.
744      This modification changes exp4.stevens because of vertical diffusion.
745    o model/src:
746      change non-curvilinear grid setting to also work with exch2 + blank tiles:
747      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
748        face dimensions.
749      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
750        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
751        and INI_SPHERICAL_POLAR_GRID.
752      change test-experiment global_ocean.90x40x15:
753      - split the domain in many more tiles (9x4 tiles of 10x10 each);
754      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
755      - update results of both test (std & dwnslp).
756    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
757       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
758    o model/src:
759      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
760        and fix initialisation when using sigma-coords.
761    o model/src:
762     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
763       to their current value at the beginning of forward_step.F": add a new run-time
764       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
765     - set doResetHFactors=T in the following test exp:
766        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
767        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
768        and tutorial_global_oce_in_p (nonLinFS in p)
769    o pkg/ecco
770      - added IES cost term
771    o verification/advect_xz
772      - scale down the depth by 1/100 (from 200 km to just 2.km)
773      - add secondary test using divergent flow, r-star and implicit vertical advection.
774      - add note (check_conserve_TS.txt) and matlab script to check global
775        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
776    o pkg/rbcs:
777      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
778    o pkg/obcs (Stevens BCs):
779      - fix various problems in the phase speed computations of the Stevens
780        boundary conditions:
781        - sign error for western and southern boundaries,
782        - time tendencies were underestimated by factor of dTracerLev and some just
783          zero (for multidim advection schemes) -> now estimate time tendencies
784          from difference between previous (n) time level and the one before (n-1);
785          this requires storing a field per tracer per boundary, also in the pickup
786          files.
787        - replace deltaTmom in cflMer/Zon computation with dTracerLev
788        - set default phase velocity to cflMer/Zon
789      - update verification experiment exp4.stevens
790    o pkg/generic_advdiff (implicit_r):
791      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
792        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
793      - fix implicit vertical diffusion or advection with NonLin FreeSurf
794        (was using current recip_hFacC instead of future recip_hFacC): set future
795        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
796        solver S/R ;
797      - fill diagnostics of vertical advective fluxes (computed from tendency)
798        when using implicit vert. advection;
799      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
800         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
801         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
802         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
803    o pkg/diagnostics:
804      - add diags for T & S tendency which goes through Adams-Bashforth.
805    
806  checkpoint63f (2011/11/30)  checkpoint63f (2011/11/30)
807  o pkg/obcs/obcs_calc_stevens.F:  o pkg/obcs/obcs_calc_stevens.F:
808    - join some loops to reduce number of if-statements    - join some loops to reduce number of if-statements

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