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revision 1.1522 by mlosch, Wed Oct 26 09:30:32 2011 UTC revision 1.1621 by heimbach, Wed Mar 14 22:59:05 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 ECCO-CLIVAR merge:
8      1. seaice AREA relaxation
9         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
10         * runtime flag: SEAICE_tauAreaObsRelax
11      2. modified global mean cost imbalance code: CPP option ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
12    o another iteration on solve_*diagonal.F
13      Make choices independent of AUTODIFF
14      Default is now the adjoinable vectorized version
15      Alternative choices are:
16      * still adjoinable but lower memory (k as inner-most loop)
17      SOLVE_DIAGONAL_KINNER
18      * non-adjoinable legacy version with low memory footprint
19      SOLVE_DIAGONAL_LOWMEMORY
20    o testreport
21     - add option to use a home made wrapper around "make"
22     - remove MITGCM_IEEE env. variable (no longer active)
23    o pkg/shelfice
24     - improve computation of friction velocity for velocity dependent
25       exchange coefficients: include velocities into SHELFICEBoundaryLayer
26       block to average velocities vertically
27     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
28    o Modify diagonal solvers, now three versions (upon request):
29      #ifndef SOLVE_DIAGONAL_AUTODIFF
30        1. default version (dating back a while ago)
31      #else /* def SOLVE_DIAGONAL_AUTODIFF */
32      # ifdef SOLVE_DIAGONAL_KINNER
33        2. adjoinable version with k-innermost loop (G. Forget)
34      # else
35        3. adjoinable vectorized version of 2.
36      # endif
37      #endif /* SOLVE_DIAGONAL_AUTODIFF */
38      All flags are currently set within routines, but could/should be moved to CPP-options.
39      Array bounds for 1. are as before, for 2.,3. cover the entire domain
40      (could be changed for 1. too).
41    o verification/lab_sea (fwd):
42      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
43        use 7 categories (except hb87), new solve4temp params (except salt_plume),
44        constant salinity (=4) or variable salinity (salt_plume) done through
45        SItracer.
46    o pkg/seaice:
47      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
48      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
49         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
50        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
51        SEAICE_freeze got retired) but already better than previously with
52        SEAICE_freeze=123456.7 deg.C;
53      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
54        (safer multi-threaded setting); always set SEAICEuseEVP;
55      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
56        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
57        stop if multiple specifications for the same coeff; make sure default
58        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
59    o pkg/obcs:
60      - allow to switch to upwind 1rst order advection scheme for the advective
61        flux computation at the open-boundary; disabled for adjoint built.
62    o pkg/ptracers:
63      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
64      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
65      - add parameter to decide when to start a tracer; use internal flag to
66        know which tracer to step-forward; switch this internal flag at the top
67        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
68        for adjoint built.
69    o pkg/seaice:
70      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
71      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
72      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
73    o pkg/ecco:
74      - fix writing of output file DiagnosCost_ClimSalt/Theta
75        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
76    o pkg/seaice:
77      - add missing initialisation of COR_ICE array in dynsolver.F
78      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
79        compiled either way, and is tested in all exps (multidim was only tested
80        in lab_sea ad before).
81      - cosmetic change to prepare for future addition of ITD. no change to results.
82        no defaults change.
83      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
84      - by lack of adequate verification experiments, I further used custom versions
85        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
86        should be correct.
87      - avoid recomputations in ad.
88    o array initialisation in adjoint mode:
89      1) pkg/mom_common/mom_calc_ke.F:
90        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
91        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
92        part this initialisation is gone, resulting in Floating Point Exception
93        (caught by open64 compiler with debug option).
94      2) model/src/convective_weights.F
95        set output convectCount over the full array range (instead of doing
96        an update): this fix a similar issue when called within recomputation (adjoint)
97        which could by-pass the initialisation (normally done in the caller S/R).
98    o pkg/seaice:
99      - final version of turbulent flux params, as agreed at MIT ice meet:
100           SEAICE_mcPheePiston (default is ~ 0.000875)
101           SEAICE_mcPheeTaper (default is 0.)
102           SEAICE_frazilFrac (defualt is 1.)
103           SEAICE_mcPheeStepFunc (default is false)
104      - changes results at trunction error level
105      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
106    o added pkg/frazil:
107      - see frazil_description.tex for details
108      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
109    o pkg/shelfice/shelfice_thermodynamics.F
110      - fix exponents for velocity dependent exchange coefficients: change
111        from 2/3(=0) to 0.66666666666666667
112      - move computation of velocity dependent exchange coefficients into
113        separate loop, so that it applies to both thermodynamics
114      - move some divisions by constants out of loops
115    
116    checkpoint63j (2012/02/16)
117    o pkg/seaice:
118      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
119      - SItracer:  added run time params, and allow coupling to ocn salinity.
120    o pkg/seaice: remove (almost) all divisions by constants within loops
121      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
122      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
123      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
124      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
125    o pkg/seaice :
126      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
127        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
128      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
129      - add permanent SItflux diag that corresponds to TFLUX but includes
130        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
131      - allow activation/testing of a fix for suspected missing term in
132        ocn-ice heat budget (to be confirmed). To test this, you want to
133        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
134        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
135      - no change in results, fwd or ad.
136    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
137      - switch to variable freezing point.
138           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
139      - bug fix : the sublimation term that was missing is now activated.
140           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
141      - bug fix : flooding sign term for SIsal0.NE.0.
142           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
143    o pkg/seaice:
144      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
145        is now the default, and the old default constant freezing point is recovered
146        with SEAICE_tempFrz0    = -1.96,
147             SEAICE_dTempFrz_dS = 0.,
148      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
149      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
150      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
151        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
152      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
153        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
154      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
155        seaice_growth r149 for legacy branch (no results change).
156      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
157        from I. Fenty).
158      - results did not change except for global_ocean.cs32x15, mostly due to the
159        switch to variable freezing point (see above item for detail).
160    o pkg/thsice:
161      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
162        seawater freezing in thsice_calc_thickn (not used).
163    o pkg/seaice: turbulent flux term specification via run time params.
164      - replace CPP switches with run time switches to facilitate testing
165      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
166                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
167      - added runtime parameter : SEAICEturbFluxFormula
168      - move Mcphee constants to SEAICE_PARAMS.h
169      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
170                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
171                 remove seaice_summary call (moved to seaice_init_fixed)
172      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
173        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
174      - seaice_summary.F : add missing report of read turbulent flux term set up
175                           and SITRACER.
176      - seaice_check.F : check range; inform and stop if retired CPPs are used
177                         (incl. SEAICE_AGE).
178      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
179             CPP switch, same computation as before for the different options.
180      - change results at the truncation level.
181    o pkg/seaice:
182      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
183        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
184        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
185      - update verification/*/input*/data.seaice:
186        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
187        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
188        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
189        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
190    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
191      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
192        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
193        difference in results only due to machine truncation.
194      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
195        MaykutPolySatVap; keep MIN_LWDOWN.
196      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
197      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
198        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
199    o pkg/salt_plume:
200      - isolate saltPlumeFlux array exch into a specific S/R called from
201        do_oceanic_phys.F
202      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
203    o verification:
204      - move untested set-up to MITgcm_contrib/verification_other.
205    o pkg/seaice:
206      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
207    o pkg/seaice:
208      - seaice_solve4temp.F (keeping results unchanged):
209        * add 2 future run-time params to select which saturation vapor pressure
210          formula is used and how post-iteration fluxes are set.
211          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
212        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
213          the linearized expression to stay consistent with tsurf finding.
214      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
215        can be < 0.
216    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
217      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
218        conductive heat flux F_c , and add it explicitly when updating tsurf as
219        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
220        so that now F_ia has a consistent meaning through the entire routine.
221        This causes differences at truncation level: update output of fwd exp.
222        global_ocean.cs32x15.seaice.
223    o pkg/seaice:
224      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
225        of arrays, sign/direction of fluxes; no effect on results.
226      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
227        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
228        note: this should have been done before changing celsius2K default.
229      - to keep results unchanged, add back old value of celsius2K in verification
230        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
231      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
232        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
233        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
234        freezing temp is consistent with value in seaice_growth.F ; this causes
235        differences at machine truncation level: update lab_sea AD output (3/4).
236    o pkg/seaice:
237      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
238        and climsst/sss even when using seaice (to prevent calculation that might
239        use SST on land); does not affect any verification exp.
240      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
241        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
242    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
243      over land (non-legacy code)
244    o vectorize salt_plume package:
245      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
246      - this code computes plumebk everywhere (also over land), thus requires
247        code to avoid divisions by zero and catch the case of kLev=Nr.
248      - efficiency of salt_plume_frac is still sub-optimal
249    o tools (genmake2):
250      - fix makefile NAME specification (option: -makefile NAME) by adding
251        "-f $MAKEFILE" in few places where it was missing including makedepend
252        command (contribution from Paul).
253    
254    checkpoint63i (2012/01/24)
255    o model/src:
256      - add factorized versions of some EOS code to find_rho.F,
257        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
258    o model/src:
259      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
260      - change default celsius2K from 273.16 to 273.15
261      - to keep results unchanged, add back old value of celsius2K in verification
262        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
263         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
264    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
265      to make TAF generate vectorizable code
266    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
267       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
268       have flags that do this more efficiently.
269    o pkg/diagnostics/diagstats_calc.F
270      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
271    o pkg/obcs (with exch2):
272      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
273        and remove code (in obcs_readparms.F) which was based on EXCH of indices
274        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
275    o pkg/exf and seaice exp:
276      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
277        so that switching off area & heff advection flags does not affect results.
278      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
279      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
280        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
281        results of verification experiments: 1D_ocean_ice_column(fwd),
282        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
283        and offline_exf_seaice (all 4).
284    o pkg/seaice:
285      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
286        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
287      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
288        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
289        not multi-dim advection;
290      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
291        SHORTWAVE_HEATING #undef.
292    o optim: make Makefile more robust (?)
293    o pkg/obcs:
294      * fix treatment of obcs_read_pickup for TAF
295    o pkg/shelfice:
296      * add missing initialisation of num_shifwflx
297      * new adjoint verification exp. for isomip
298      * change Prandtl and Schmidt numbers from generic formulations
299        (in terms of model diffus. and visc.) to separate runtime
300        parameters, with Holland and Jenkins (1999) default values.
301    o pkg/exf (interpolation):
302      - extended input field (2 rows) near the N & S poles:
303        * fill in with the symetric value (when even Nb of data in longitude)
304        * add average value at the poles only for scalar quantities ; for vector
305          component interpolation, skip the averaging and keep duplicated values,
306          unless the 2 components have same location (uvInterp=T) in which case
307          interpolate the 2 components together using S/R EXF_INTERP_UV.
308      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
309        together: this allows to account properly for local orientation when
310        averaging at N & S pole.
311      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
312        exf-interpolation near N & S poles. Undef by default.
313      - add debug check/print on 1rst iter if debugLevel >=2.
314    o pkg/exf:
315      - change masking flags definition (no longer "parameter"), put them in
316        common block and set them in S/R EXF_INIT_FIXED.
317      - change recognized masking flag from s,u,v to c,w,s since the mask
318        to use (maskC,W,S) depends on position on model grid and has little to
319        do with scalar/vector difference; fix masking if using P-coordinates.
320      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
321        and update results of exp. global_with_exf (x2).
322      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
323    o pkg/obcs
324      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
325    o pkg/exf (interpolation):
326      - assume periodicity in X only if input field cover full longitude range.
327      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
328        and should vectorise).
329      - fix input lat of the 2 added row (in case we provide N.pole data).
330    
331    checkpoint63h (2011/12/30)
332    o pkg/seaice:
333      - change declaration of UVM from _RL to _RS in order to get B-grid
334        uIce,vIce monitor when _RS = real*4
335    o pkg/offline:
336      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
337      - compute vertical velocity if not read from file (switch on exactConserv
338        & staggerTimeStep);
339      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
340    o verification:
341      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
342        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
343        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
344      - update output of exp. global_ocean.cs32x15.viscA4 after changing
345        grid-file angles (used here for coriolis-3d);
346      - remove (or gzip) few files not needed to run fizhi-cs experiments.
347    o pkg/exf (vector interpolation):
348      - rotate vector component toward local grid-axis orientation using grid-angles
349        (stored in GRID.h) instead of locally computed rotation angle; keep old code
350        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
351    o pkg/seaice:
352      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
353        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
354    o pkg/PKG_OPTIONS.h files:
355      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
356        outside of the #ifdef ALLOW_THISPKG / #endif block.
357      - update verification/*/code/PKG_OPTIONS.h files.
358    o add a verification experiment (offline_exf_seaice/input.seaice) that test
359      the B-grid LSOR solver
360    o pkg/seaice: sort out emissivity and long wave radiation step 2:
361      - add emissivity for snow and ice as new run-time parameters
362        (unfortunately) that default to the corresponding exf values; this
363        changes results in most verification experiments so that for backward
364        compatibility these parameter have to be set explicitly to inconsistent
365        values (ugly);
366      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
367        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
368        until we agree how to handle this bug properly
369    o pkg/exf (interpolation):
370      - add a set of run-time param ({inputfield}_interpMethod), one for
371        each interpolated input field, to select the interpolation method
372        with a value of zero switching off the interpolation;
373      - print interpolation parameters to standard output;
374      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
375        (to use instead runoff_interpMethod=0 in data.exf).
376      - simplify default setting of interpolation parameters (for all fields,
377        set position to match model grid cell-center position, leading to trivial
378        interpolation in case of regular Lat-Lon grid) and fix for the case of
379        non-uniform delY.
380    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
381       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
382       this factor is absolutely required, because the lw exitance (= out-going
383       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
384       where the reflectivity rho = 1-emissivity for conservation reasons. Once
385       this is established, we can remove the CPP-Flag (if we want to).
386    o pkg/seaice:
387      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
388        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
389      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
390        what the name implies (and not emissivity*BoltzmannConstant), this means
391        the old default value of 5.5e-8 now means
392        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
393        S/R exf_readparms
394      - FV-discretization of the B-grid LSOR solver, turn on with
395        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
396        of the calling routine dynsolver, so that B and C-grid code look a
397        little more alike.
398      - fix index bugs in ostres.F (B-grid code)
399    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
400    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
401      default for SEAICE_emissivity, if useEXF; requires setting a wrong
402      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
403      backward compatiblity
404    o model/src: use sigmaR in calc_ivdc
405    
406    checkpoint63g (2011/12/16)
407    o pkg/seaice/seaice_growth.F:
408      fix heat conservation of the coupled ocean-seaice system.
409      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
410      solid vs liquid water treatment is resolved via QNET.
411    o pkg/seaice/seaice_growth.F:
412      add missing term for sublimation in saltFlux, which was breaking conservation.
413    o pkg/seaice/seaice_model.F:
414      Remove this patholigical case treatment in evolution branch,
415      where it is un-necessary and breaks conservation.
416      Update global_ocean.cs32x15/results accordingly for
417      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
418    o model/src:
419      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
420      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
421    o pkg/obcs:
422      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
423      tendency for temperature and salinity that is then applied to update
424      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
425      horizontal advection and diffusion contributions on the boundary (in
426      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
427      removing the mask in S/R timestep_tracer. The advantage of this approach is
428      that the updated tracer values include contributions from the surface
429      forcing and vertical diffusion.
430      This modification changes exp4.stevens because of vertical diffusion.
431    o model/src:
432      change non-curvilinear grid setting to also work with exch2 + blank tiles:
433      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
434        face dimensions.
435      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
436        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
437        and INI_SPHERICAL_POLAR_GRID.
438      change test-experiment global_ocean.90x40x15:
439      - split the domain in many more tiles (9x4 tiles of 10x10 each);
440      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
441      - update results of both test (std & dwnslp).
442    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
443       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
444    o model/src:
445      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
446        and fix initialisation when using sigma-coords.
447    o model/src:
448     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
449       to their current value at the beginning of forward_step.F": add a new run-time
450       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
451     - set doResetHFactors=T in the following test exp:
452        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
453        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
454        and tutorial_global_oce_in_p (nonLinFS in p)
455    o pkg/ecco
456      - added IES cost term
457    o verification/advect_xz
458      - scale down the depth by 1/100 (from 200 km to just 2.km)
459      - add secondary test using divergent flow, r-star and implicit vertical advection.
460      - add note (check_conserve_TS.txt) and matlab script to check global
461        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
462    o pkg/rbcs:
463      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
464    o pkg/obcs (Stevens BCs):
465      - fix various problems in the phase speed computations of the Stevens
466        boundary conditions:
467        - sign error for western and southern boundaries,
468        - time tendencies were underestimated by factor of dTracerLev and some just
469          zero (for multidim advection schemes) -> now estimate time tendencies
470          from difference between previous (n) time level and the one before (n-1);
471          this requires storing a field per tracer per boundary, also in the pickup
472          files.
473        - replace deltaTmom in cflMer/Zon computation with dTracerLev
474        - set default phase velocity to cflMer/Zon
475      - update verification experiment exp4.stevens
476    o pkg/generic_advdiff (implicit_r):
477      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
478        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
479      - fix implicit vertical diffusion or advection with NonLin FreeSurf
480        (was using current recip_hFacC instead of future recip_hFacC): set future
481        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
482        solver S/R ;
483      - fill diagnostics of vertical advective fluxes (computed from tendency)
484        when using implicit vert. advection;
485      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
486         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
487         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
488         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
489    o pkg/diagnostics:
490      - add diags for T & S tendency which goes through Adams-Bashforth.
491    
492    checkpoint63f (2011/11/30)
493    o pkg/obcs/obcs_calc_stevens.F:
494      - join some loops to reduce number of if-statements
495      - fix a bug in code for northern and southern boundaries.
496    o pkg/seaice/seaice_init_varia.F
497      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
498        caused zero ice-velocities for the B-grid code
499    o pkg/seaice/seaice_init_fixed.F
500      - fix a bug in the initialisation of the second metric terms
501        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
502      - this affects all seaice configurations with useCurviLinearGrid = .true.
503        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
504        = .true. (default)
505      - the only verification experiment affected is global_ocean.cs32x15:
506        icedyn, seaice, and seaice_dynmix (AD)
507    o pkg/thsice/thsice_diagnostics_state.F
508      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
509        not contain garbage that can lead to surprises in diagstats_calc.F
510    o model/src:
511      - move bi,bj loops inside INTEGR_CONTINUITY ;
512      - call INTEGR_CONTINUITY directly from forward_step.F
513        (previously called from momentum_correction_step.F)
514      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
515        forward_step.F and pkg/ecco/the_main_loop.F
516    o model/src/do_oceanic_phys.F:
517      - reset addMass to zero only if useICEFRONT ;
518      - separated k-loop for rhoInSitu calculation ;
519      - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
520        and at constant T,S (= WdRHOdP);
521      NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
522        of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
523        transport of locally-referenced potential density);
524        to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
525    o gluemnc:
526      - replace ncrcat with ncks when adding variables to *.glob.nc
527      - change the way variables without record dimensions are handled so that
528        files that have variables with and without record variables can be glued:
529        add a record dimension with a new unique name to be able to differentiate
530        between variable with and without a-prior record dimensions. Remove
531        this record dimension before adding the variable to the *.glob.nc file.
532        This procedure automatically works also for grid.*.nc files that do not
533        have any record dimension.
534    o verification/cpl_aim+ocn:
535      - generate new reference output on baudelaire (gfortran, mpich2) (previously
536        from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
537    o pkg/obcs/obcs_calc_stevens.F:
538      - add code for northern and southern boundaries.
539      - reorder some loops to save some operations and so that drFBar can be scalar
540    o model/src:
541      - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
542        truncation) and add diagnostics for Adams-Bashforth tendency increment.
543      - update test-exp. AD output:
544        1D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
545      and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
546        front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
547        global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
548        matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
549        tutorial_global_oce_in_p, tutorial_global_oce_latlon and
550        tutorial_plume_on_slope.
551    o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
552      that vectorises. This code uses 3 extra 2D fields, F90 array assignments
553      and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
554      does not even come with an F77 compiler anymore, this should not be
555      a limitation
556    
557    checkpoint63e (2011/11/06)
558    o pkg/seaice adjoint of LSR:
559      - substantially rework STORE dirs.
560      - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
561        this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
562        and only perform SOLV_MAX_FIXED adjoint iters.
563        If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
564        always goes to same record, meaning that the last forward field will be
565        the one used in the adjoint - an approximation.
566      - now produces non-zero LSR-related gradients, and acceptable gradients for
567        An's zonal (x-z) test case (to be checked in)
568      - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
569        (but these are screwed up by the thermodynamics in the first place);
570        reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
571        output_adm.txt also reflects changes to seaice_lsr
572      - global_ocean.cs32x15:
573        * the "default" input_ad.seaice has been re-defined to always exclude dynamics
574          (output_adm.seaice.txt was updated)
575        * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
576          (output_adm.seaice_dynmix.txt)
577    o test-exp. exp4+stevens:
578      - switch off pTracers and nonHydrostatic (restart problems with NH); update output
579    o pkg/seaice (lsr solver):
580      - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
581        update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
582      - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
583      - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
584        into initial guess for linearised solver; use weight ~ (1/err)^2,4.
585      - compute (with new S/R) and print initial (+ free-driff sol. if available)
586        and final residual of linearised system.
587  o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity  o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
588    (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)    (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
589  o pkg/obcs: Stevens BCs (still only for east and west)  o pkg/obcs: Stevens BCs (still only for east and west)
590    - fix Stevens BCs by using intermediate velocities of previous    - fix Stevens BCs by using intermediate velocities of previous
591      time step as "baroclinic" contribution rather velocity of one grid cell      time step as "baroclinic" contribution rather velocity of one grid cell
592      inside the boundaries; more consistent but makes the entire treatment      inside the boundaries; more consistent but makes the entire treatment
593      more complicated, requires new pickup files and two new S/Rs:      more complicated, requires new pickup files and two new S/Rs:
594      obcs_copy_uv_n and obcs_save_uv_n      obcs_copy_uv_n and obcs_save_uv_n
595      keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY      keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
596      (undefined by default)      (undefined by default)
597    - silently move computation of some grid factors into separate loops to    - silently move computation of some grid factors into separate loops to
598      save some recomputations      save some recomputations
599    - add a hack for non-linear free surface    - add a hack for non-linear free surface
600    - add a verification experiment to exp4 that tests this code    - add a verification experiment to exp4 that tests this code

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