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revision 1.1502 by jmc, Wed Sep 21 16:29:49 2011 UTC revision 1.1629 by jmc, Mon Mar 19 22:58:12 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/icefront: fix bug and reorder loop in icefront_init_varia.F
8    o pkg/mom_vecinv:
9      - fix 1 loop range in mom_vecinv.F to be like all the other loops which
10        set/update gu,gv/Diss (fix Pb of uninitialised fVerUkp in admom_vecinv
11        with non-lin free-surf).
12    o model/src: move k-loop outside of i/j-loops when (re-)computing R_low
13      in ini/update_masks_etc.F in order to avoid -O3 optimization problems with
14      some compilers (gfortran 4.6.0 on MacOS)
15    o momentum:
16      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
17        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
18        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
19    
20    checkpoint63k (2012/03/17)
21    o model/src:
22       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
23         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
24       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
25         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
26    o model/src: solve_*diagonal.F
27       - replace division with multiplication by inverse (similar to original version)
28         update output of AD exp. global_ocean.90x40x15.
29       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
30         to enable the use of the vectorized & differentiable solve_tridiagonal.F
31       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
32         vertical advection (to get solve_tridiagonal tested in AD mode).
33    o pkg/seaice: ECCO-CLIVAR merge:
34      1. seaice AREA relaxation
35         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
36         * runtime flag: SEAICE_tauAreaObsRelax
37      2. modified global mean cost imbalance code: CPP option
38          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
39    o another iteration on solve_*diagonal.F
40       Make choices independent of AUTODIFF
41       Default will be the adjoinable vectorized version.
42       Alternative choices are:
43       * non-adjoinable original version with low memory footprint:
44         #define SOLVE_DIAGONAL_LOWMEMORY
45       * still adjoinable but does not vectorize (k as inner-most loop):
46         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
47    o testreport
48     - add option to use a home made wrapper around "make"
49     - remove MITGCM_IEEE env. variable (no longer active)
50    o pkg/shelfice
51     - improve computation of friction velocity for velocity dependent
52       exchange coefficients: include velocities into SHELFICEBoundaryLayer
53       block to average velocities vertically
54     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
55    o Modify diagonal solvers, now three versions (upon request):
56      #ifndef SOLVE_DIAGONAL_AUTODIFF
57        1. default version (dating back a while ago)
58      #else /* def SOLVE_DIAGONAL_AUTODIFF */
59      # ifdef SOLVE_DIAGONAL_KINNER
60        2. adjoinable version with k-innermost loop (G. Forget)
61      # else
62        3. adjoinable vectorized version of 2.
63      # endif
64      #endif /* SOLVE_DIAGONAL_AUTODIFF */
65      All flags are currently set within routines, but could/should be moved to CPP-options.
66      Array bounds for 1. are as before, for 2.,3. cover the entire domain
67      (could be changed for 1. too).
68    o verification/lab_sea (fwd):
69      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
70        use 7 categories (except hb87), new solve4temp params (except salt_plume),
71        constant salinity (=4) or variable salinity (salt_plume) done through
72        SItracer.
73    o pkg/seaice:
74      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
75      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
76         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
77        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
78        SEAICE_freeze got retired) but already better than previously with
79        SEAICE_freeze=123456.7 deg.C;
80      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
81        (safer multi-threaded setting); always set SEAICEuseEVP;
82      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
83        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
84        stop if multiple specifications for the same coeff; make sure default
85        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
86    o pkg/obcs:
87      - allow to switch to upwind 1rst order advection scheme for the advective
88        flux computation at the open-boundary; disabled for adjoint built.
89    o pkg/ptracers:
90      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
91      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
92      - add parameter to decide when to start a tracer; use internal flag to
93        know which tracer to step-forward; switch this internal flag at the top
94        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
95        for adjoint built.
96    o pkg/seaice:
97      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
98      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
99      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
100    o pkg/ecco:
101      - fix writing of output file DiagnosCost_ClimSalt/Theta
102        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
103    o pkg/seaice:
104      - add missing initialisation of COR_ICE array in dynsolver.F
105      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
106        compiled either way, and is tested in all exps (multidim was only tested
107        in lab_sea ad before).
108      - cosmetic change to prepare for future addition of ITD. no change to results.
109        no defaults change.
110      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
111      - by lack of adequate verification experiments, I further used custom versions
112        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
113        should be correct.
114      - avoid recomputations in ad.
115    o array initialisation in adjoint mode:
116      1) pkg/mom_common/mom_calc_ke.F:
117        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
118        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
119        part this initialisation is gone, resulting in Floating Point Exception
120        (caught by open64 compiler with debug option).
121      2) model/src/convective_weights.F
122        set output convectCount over the full array range (instead of doing
123        an update): this fix a similar issue when called within recomputation (adjoint)
124        which could by-pass the initialisation (normally done in the caller S/R).
125    o pkg/seaice:
126      - final version of turbulent flux params, as agreed at MIT ice meet:
127           SEAICE_mcPheePiston (default is ~ 0.000875)
128           SEAICE_mcPheeTaper (default is 0.)
129           SEAICE_frazilFrac (defualt is 1.)
130           SEAICE_mcPheeStepFunc (default is false)
131      - changes results at trunction error level
132      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
133    o added pkg/frazil:
134      - see frazil_description.tex for details
135      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
136    o pkg/shelfice/shelfice_thermodynamics.F
137      - fix exponents for velocity dependent exchange coefficients: change
138        from 2/3(=0) to 0.66666666666666667
139      - move computation of velocity dependent exchange coefficients into
140        separate loop, so that it applies to both thermodynamics
141      - move some divisions by constants out of loops
142    
143    checkpoint63j (2012/02/16)
144    o pkg/seaice:
145      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
146      - SItracer:  added run time params, and allow coupling to ocn salinity.
147    o pkg/seaice: remove (almost) all divisions by constants within loops
148      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
149      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
150      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
151      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
152    o pkg/seaice :
153      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
154        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
155      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
156      - add permanent SItflux diag that corresponds to TFLUX but includes
157        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
158      - allow activation/testing of a fix for suspected missing term in
159        ocn-ice heat budget (to be confirmed). To test this, you want to
160        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
161        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
162      - no change in results, fwd or ad.
163    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
164      - switch to variable freezing point.
165           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
166      - bug fix : the sublimation term that was missing is now activated.
167           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
168      - bug fix : flooding sign term for SIsal0.NE.0.
169           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
170    o pkg/seaice:
171      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
172        is now the default, and the old default constant freezing point is recovered
173        with SEAICE_tempFrz0    = -1.96,
174             SEAICE_dTempFrz_dS = 0.,
175      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
176      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
177      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
178        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
179      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
180        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
181      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
182        seaice_growth r149 for legacy branch (no results change).
183      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
184        from I. Fenty).
185      - results did not change except for global_ocean.cs32x15, mostly due to the
186        switch to variable freezing point (see above item for detail).
187    o pkg/thsice:
188      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
189        seawater freezing in thsice_calc_thickn (not used).
190    o pkg/seaice: turbulent flux term specification via run time params.
191      - replace CPP switches with run time switches to facilitate testing
192      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
193                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
194      - added runtime parameter : SEAICEturbFluxFormula
195      - move Mcphee constants to SEAICE_PARAMS.h
196      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
197                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
198                 remove seaice_summary call (moved to seaice_init_fixed)
199      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
200        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
201      - seaice_summary.F : add missing report of read turbulent flux term set up
202                           and SITRACER.
203      - seaice_check.F : check range; inform and stop if retired CPPs are used
204                         (incl. SEAICE_AGE).
205      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
206             CPP switch, same computation as before for the different options.
207      - change results at the truncation level.
208    o pkg/seaice:
209      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
210        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
211        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
212      - update verification/*/input*/data.seaice:
213        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
214        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
215        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
216        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
217    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
218      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
219        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
220        difference in results only due to machine truncation.
221      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
222        MaykutPolySatVap; keep MIN_LWDOWN.
223      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
224      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
225        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
226    o pkg/salt_plume:
227      - isolate saltPlumeFlux array exch into a specific S/R called from
228        do_oceanic_phys.F
229      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
230    o verification:
231      - move untested set-up to MITgcm_contrib/verification_other.
232    o pkg/seaice:
233      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
234    o pkg/seaice:
235      - seaice_solve4temp.F (keeping results unchanged):
236        * add 2 future run-time params to select which saturation vapor pressure
237          formula is used and how post-iteration fluxes are set.
238          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
239        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
240          the linearized expression to stay consistent with tsurf finding.
241      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
242        can be < 0.
243    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
244      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
245        conductive heat flux F_c , and add it explicitly when updating tsurf as
246        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
247        so that now F_ia has a consistent meaning through the entire routine.
248        This causes differences at truncation level: update output of fwd exp.
249        global_ocean.cs32x15.seaice.
250    o pkg/seaice:
251      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
252        of arrays, sign/direction of fluxes; no effect on results.
253      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
254        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
255        note: this should have been done before changing celsius2K default.
256      - to keep results unchanged, add back old value of celsius2K in verification
257        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
258      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
259        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
260        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
261        freezing temp is consistent with value in seaice_growth.F ; this causes
262        differences at machine truncation level: update lab_sea AD output (3/4).
263    o pkg/seaice:
264      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
265        and climsst/sss even when using seaice (to prevent calculation that might
266        use SST on land); does not affect any verification exp.
267      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
268        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
269    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
270      over land (non-legacy code)
271    o vectorize salt_plume package:
272      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
273      - this code computes plumebk everywhere (also over land), thus requires
274        code to avoid divisions by zero and catch the case of kLev=Nr.
275      - efficiency of salt_plume_frac is still sub-optimal
276    o tools (genmake2):
277      - fix makefile NAME specification (option: -makefile NAME) by adding
278        "-f $MAKEFILE" in few places where it was missing including makedepend
279        command (contribution from Paul).
280    
281    checkpoint63i (2012/01/24)
282    o model/src:
283      - add factorized versions of some EOS code to find_rho.F,
284        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
285    o model/src:
286      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
287      - change default celsius2K from 273.16 to 273.15
288      - to keep results unchanged, add back old value of celsius2K in verification
289        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
290         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
291    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
292      to make TAF generate vectorizable code
293    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
294       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
295       have flags that do this more efficiently.
296    o pkg/diagnostics/diagstats_calc.F
297      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
298    o pkg/obcs (with exch2):
299      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
300        and remove code (in obcs_readparms.F) which was based on EXCH of indices
301        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
302    o pkg/exf and seaice exp:
303      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
304        so that switching off area & heff advection flags does not affect results.
305      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
306      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
307        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
308        results of verification experiments: 1D_ocean_ice_column(fwd),
309        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
310        and offline_exf_seaice (all 4).
311    o pkg/seaice:
312      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
313        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
314      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
315        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
316        not multi-dim advection;
317      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
318        SHORTWAVE_HEATING #undef.
319    o optim: make Makefile more robust (?)
320    o pkg/obcs:
321      * fix treatment of obcs_read_pickup for TAF
322    o pkg/shelfice:
323      * add missing initialisation of num_shifwflx
324      * new adjoint verification exp. for isomip
325      * change Prandtl and Schmidt numbers from generic formulations
326        (in terms of model diffus. and visc.) to separate runtime
327        parameters, with Holland and Jenkins (1999) default values.
328    o pkg/exf (interpolation):
329      - extended input field (2 rows) near the N & S poles:
330        * fill in with the symetric value (when even Nb of data in longitude)
331        * add average value at the poles only for scalar quantities ; for vector
332          component interpolation, skip the averaging and keep duplicated values,
333          unless the 2 components have same location (uvInterp=T) in which case
334          interpolate the 2 components together using S/R EXF_INTERP_UV.
335      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
336        together: this allows to account properly for local orientation when
337        averaging at N & S pole.
338      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
339        exf-interpolation near N & S poles. Undef by default.
340      - add debug check/print on 1rst iter if debugLevel >=2.
341    o pkg/exf:
342      - change masking flags definition (no longer "parameter"), put them in
343        common block and set them in S/R EXF_INIT_FIXED.
344      - change recognized masking flag from s,u,v to c,w,s since the mask
345        to use (maskC,W,S) depends on position on model grid and has little to
346        do with scalar/vector difference; fix masking if using P-coordinates.
347      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
348        and update results of exp. global_with_exf (x2).
349      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
350    o pkg/obcs
351      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
352    o pkg/exf (interpolation):
353      - assume periodicity in X only if input field cover full longitude range.
354      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
355        and should vectorise).
356      - fix input lat of the 2 added row (in case we provide N.pole data).
357    
358    checkpoint63h (2011/12/30)
359    o pkg/seaice:
360      - change declaration of UVM from _RL to _RS in order to get B-grid
361        uIce,vIce monitor when _RS = real*4
362    o pkg/offline:
363      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
364      - compute vertical velocity if not read from file (switch on exactConserv
365        & staggerTimeStep);
366      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
367    o verification:
368      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
369        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
370        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
371      - update output of exp. global_ocean.cs32x15.viscA4 after changing
372        grid-file angles (used here for coriolis-3d);
373      - remove (or gzip) few files not needed to run fizhi-cs experiments.
374    o pkg/exf (vector interpolation):
375      - rotate vector component toward local grid-axis orientation using grid-angles
376        (stored in GRID.h) instead of locally computed rotation angle; keep old code
377        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
378    o pkg/seaice:
379      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
380        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
381    o pkg/PKG_OPTIONS.h files:
382      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
383        outside of the #ifdef ALLOW_THISPKG / #endif block.
384      - update verification/*/code/PKG_OPTIONS.h files.
385    o add a verification experiment (offline_exf_seaice/input.seaice) that test
386      the B-grid LSOR solver
387    o pkg/seaice: sort out emissivity and long wave radiation step 2:
388      - add emissivity for snow and ice as new run-time parameters
389        (unfortunately) that default to the corresponding exf values; this
390        changes results in most verification experiments so that for backward
391        compatibility these parameter have to be set explicitly to inconsistent
392        values (ugly);
393      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
394        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
395        until we agree how to handle this bug properly
396    o pkg/exf (interpolation):
397      - add a set of run-time param ({inputfield}_interpMethod), one for
398        each interpolated input field, to select the interpolation method
399        with a value of zero switching off the interpolation;
400      - print interpolation parameters to standard output;
401      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
402        (to use instead runoff_interpMethod=0 in data.exf).
403      - simplify default setting of interpolation parameters (for all fields,
404        set position to match model grid cell-center position, leading to trivial
405        interpolation in case of regular Lat-Lon grid) and fix for the case of
406        non-uniform delY.
407    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
408       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
409       this factor is absolutely required, because the lw exitance (= out-going
410       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
411       where the reflectivity rho = 1-emissivity for conservation reasons. Once
412       this is established, we can remove the CPP-Flag (if we want to).
413    o pkg/seaice:
414      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
415        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
416      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
417        what the name implies (and not emissivity*BoltzmannConstant), this means
418        the old default value of 5.5e-8 now means
419        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
420        S/R exf_readparms
421      - FV-discretization of the B-grid LSOR solver, turn on with
422        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
423        of the calling routine dynsolver, so that B and C-grid code look a
424        little more alike.
425      - fix index bugs in ostres.F (B-grid code)
426    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
427    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
428      default for SEAICE_emissivity, if useEXF; requires setting a wrong
429      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
430      backward compatiblity
431    o model/src: use sigmaR in calc_ivdc
432    
433    checkpoint63g (2011/12/16)
434    o pkg/seaice/seaice_growth.F:
435      fix heat conservation of the coupled ocean-seaice system.
436      when SEAICE_HEAT_CONSERV_FIX is defined, the mismatch of
437      solid vs liquid water treatment is resolved via QNET.
438    o pkg/seaice/seaice_growth.F:
439      add missing term for sublimation in saltFlux, which was breaking conservation.
440    o pkg/seaice/seaice_model.F:
441      Remove this patholigical case treatment in evolution branch,
442      where it is un-necessary and breaks conservation.
443      Update global_ocean.cs32x15/results accordingly for
444      output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
445    o model/src:
446      useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
447      external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.
448    o pkg/obcs:
449      modify Stevens boundary conditions so that S/R obcs_calc_stevens computes
450      tendency for temperature and salinity that is then applied to update
451      theta and salt in S/R obcs_apply_ts; this requires proper masking of all
452      horizontal advection and diffusion contributions on the boundary (in
453      S/Rs gad_advection, gad_calc_rhs, gmredi_rtransport, gmredi_calc_diff), and
454      removing the mask in S/R timestep_tracer. The advantage of this approach is
455      that the updated tracer values include contributions from the surface
456      forcing and vertical diffusion.
457      This modification changes exp4.stevens because of vertical diffusion.
458    o model/src:
459      change non-curvilinear grid setting to also work with exch2 + blank tiles:
460      - move delX,delY to new header file (SET_GRID.h) and adjust length to 1rst
461        face dimensions.
462      - new S/R INI_LOCAL_GRID to define model tile-local grid (using same units
463        as delX,delY) and called from S/R INI_CARTESIAN_GRID, INI_CYLINDER_GRID
464        and INI_SPHERICAL_POLAR_GRID.
465      change test-experiment global_ocean.90x40x15:
466      - split the domain in many more tiles (9x4 tiles of 10x10 each);
467      - switch to exch2 and remove 1 blank-tile (but only for MPI test).
468      - update results of both test (std & dwnslp).
469    o pkg/diagnostics/diagstat_calc.F: fix problem with non-initialised halos in
470       tmp-fields for TARGET_NEC_SX at the cost of extra loops and less vectorisation
471    o model/src:
472      - take sigma-coords related code out of update_etah.F into new S/R UPDATE_ETAWS
473        and fix initialisation when using sigma-coords.
474    o model/src:
475     - improve Gael's changes from Jan 14, 2011 "addition of an 'update' of hfacc etc.
476       to their current value at the beginning of forward_step.F": add a new run-time
477       switch "doResetHFactors" (default=false) and use it to do (or not) the resetting.
478     - set doResetHFactors=T in the following test exp:
479        global_ocean.90x40x15/input (rStar) & input.dwnslp (linFS),
480        global_ocean.cs32x15/input.seaice (rStar), hs94.cs-32x32x5/input.impIGW (linFS)
481        and tutorial_global_oce_in_p (nonLinFS in p)
482    o pkg/ecco
483      - added IES cost term
484    o verification/advect_xz
485      - scale down the depth by 1/100 (from 200 km to just 2.km)
486      - add secondary test using divergent flow, r-star and implicit vertical advection.
487      - add note (check_conserve_TS.txt) and matlab script to check global
488        conservation of T & S with NonLin-FreeSurf and Adams-Bashforth.
489    o pkg/rbcs:
490      - add missing relaxUFile & relaxVFile in namelist (in rbcs_readparms.F).
491    o pkg/obcs (Stevens BCs):
492      - fix various problems in the phase speed computations of the Stevens
493        boundary conditions:
494        - sign error for western and southern boundaries,
495        - time tendencies were underestimated by factor of dTracerLev and some just
496          zero (for multidim advection schemes) -> now estimate time tendencies
497          from difference between previous (n) time level and the one before (n-1);
498          this requires storing a field per tracer per boundary, also in the pickup
499          files.
500        - replace deltaTmom in cflMer/Zon computation with dTracerLev
501        - set default phase velocity to cflMer/Zon
502      - update verification experiment exp4.stevens
503    o pkg/generic_advdiff (implicit_r):
504      - fix implicit vertical advection conservation with AB and/or NonLin-FreeSurf
505        (remove Tr*d/dz(w) in gad_implicit_r.F and add it in gad_calc_rhs.F);
506      - fix implicit vertical diffusion or advection with NonLin FreeSurf
507        (was using current recip_hFacC instead of future recip_hFacC): set future
508        recip_hFac in thermodynamics.F and pass & use it in all vertical implicit
509        solver S/R ;
510      - fill diagnostics of vertical advective fluxes (computed from tendency)
511        when using implicit vert. advection;
512      - update output of exp that uses NonLin-FreeSurf & implicit vertical diffusion:
513         global_ocean.90x40x15 (fwd+AD), global_ocean.cs32x15 (4 fwd +4 AD),
514         tutorial_global_oce_in_p (fwd), tutorial_tracer_adjsens (AD)
515         and cpl_aim+ocn (used in ocean); to be fixed: bottom_ctrl_5x5.
516    o pkg/diagnostics:
517      - add diags for T & S tendency which goes through Adams-Bashforth.
518    
519    checkpoint63f (2011/11/30)
520    o pkg/obcs/obcs_calc_stevens.F:
521      - join some loops to reduce number of if-statements
522      - fix a bug in code for northern and southern boundaries.
523    o pkg/seaice/seaice_init_varia.F
524      - undo resetting UVM=0 that has slipped in unnoticed in r1.49 and
525        caused zero ice-velocities for the B-grid code
526    o pkg/seaice/seaice_init_fixed.F
527      - fix a bug in the initialisation of the second metric terms
528        k2AtC and k2AtZ: k2AtC was set to the value of k2AtZ and k2AtZ was 0.
529      - this affects all seaice configurations with useCurviLinearGrid = .true.
530        and SEAICEuseDynamics = .true. (default) and SEAICEuseMetricTerms
531        = .true. (default)
532      - the only verification experiment affected is global_ocean.cs32x15:
533        icedyn, seaice, and seaice_dynmix (AD)
534    o pkg/thsice/thsice_diagnostics_state.F
535      - only for TARGET_NEC_SX: initialise all of tmpFld, so that overlap does
536        not contain garbage that can lead to surprises in diagstats_calc.F
537    o model/src:
538      - move bi,bj loops inside INTEGR_CONTINUITY ;
539      - call INTEGR_CONTINUITY directly from forward_step.F
540        (previously called from momentum_correction_step.F)
541      - call UPDATE_ETAH from integr_continuity.F and update initialise_varia.F,
542        forward_step.F and pkg/ecco/the_main_loop.F
543    o model/src/do_oceanic_phys.F:
544      - reset addMass to zero only if useICEFRONT ;
545      - separated k-loop for rhoInSitu calculation ;
546      - add 2 diagnostics for wVel*delta^k(Rho) at constant pressure (= WdRHO_P)
547        and at constant T,S (= WdRHOdP);
548      NOTE: change diagnostics WRHOMASS : this is now simply the Vertical transport
549        of In-Situ Density (Anomaly) (=wVel*rho^bar-k) (previously was Vertical
550        transport of locally-referenced potential density);
551        to recover old diag: (WRHOMASS)_old = (WRHOMASS)_new -1/2 * (WdRHOdP)
552    o gluemnc:
553      - replace ncrcat with ncks when adding variables to *.glob.nc
554      - change the way variables without record dimensions are handled so that
555        files that have variables with and without record variables can be glued:
556        add a record dimension with a new unique name to be able to differentiate
557        between variable with and without a-prior record dimensions. Remove
558        this record dimension before adding the variable to the *.glob.nc file.
559        This procedure automatically works also for grid.*.nc files that do not
560        have any record dimension.
561    o verification/cpl_aim+ocn:
562      - generate new reference output on baudelaire (gfortran, mpich2) (previously
563        from old aces-grid cluster, ao + ifort) and update 'run_cpl_test' script.
564    o pkg/obcs/obcs_calc_stevens.F:
565      - add code for northern and southern boundaries.
566      - reorder some loops to save some operations and so that drFBar can be scalar
567    o model/src:
568      - re-arrange extrapolation calculation in Adams-Bashforth S/R (affects machine
569        truncation) and add diagnostics for Adams-Bashforth tendency increment.
570      - update test-exp. AD output:
571        1D_ocean_ice_column, bottom_ctrl_5x5, lab_sea.noseaicedyn, obcs_ctrl;
572      and FWD output: exp4 (x3), fizhi-cs-32x32x40, fizhi-cs-aqualev20,
573        front_relax (x3), global_ocean.90x40x15 (x2), global_ocean.cs32x15 (x5),
574        global_ocean_ebm, ideal_2D_oce, internal_wave, isomip (x3), lab_sea (x4),
575        matrix_example, MLAdjust (x5), natl_box (x2), tutorial_advection_in_gyre,
576        tutorial_global_oce_in_p, tutorial_global_oce_latlon and
577        tutorial_plume_on_slope.
578    o pkg/diagnostics/diagstats_calc.F: add special code for TARGET_NEC_SX
579      that vectorises. This code uses 3 extra 2D fields, F90 array assignments
580      and F90 intrinsic routines SUM, MINVAL, MAXVAL, but since TARGET_NEC_SX
581      does not even come with an F77 compiler anymore, this should not be
582      a limitation
583    
584    checkpoint63e (2011/11/06)
585    o pkg/seaice adjoint of LSR:
586      - substantially rework STORE dirs.
587      - add new flag SEAICE_LSR_ADJOINT_ITER and parameter SOLV_MAX_FIXED
588        this flag will do SOLV_MAX_ITERS but only store SOLV_MAX_FIXED fields
589        and only perform SOLV_MAX_FIXED adjoint iters.
590        If flag SEAICE_LSR_ADJOINT_ITER is undef-ined, the store in the iteration
591        always goes to same record, meaning that the last forward field will be
592        the one used in the adjoint - an approximation.
593      - now produces non-zero LSR-related gradients, and acceptable gradients for
594        An's zonal (x-z) test case (to be checked in)
595      - lab_sea: produces acceptable gradients for lab_sea with forward/backward LSR
596        (but these are screwed up by the thermodynamics in the first place);
597        reduce from 4 to 3 timesteps to avoid t.d. issue as temporary solution;
598        output_adm.txt also reflects changes to seaice_lsr
599      - global_ocean.cs32x15:
600        * the "default" input_ad.seaice has been re-defined to always exclude dynamics
601          (output_adm.seaice.txt was updated)
602        * new input_ad.seaice_dynmix tests a forward LSR / backward free-drift
603          (output_adm.seaice_dynmix.txt)
604    o test-exp. exp4+stevens:
605      - switch off pTracers and nonHydrostatic (restart problems with NH); update output
606    o pkg/seaice (lsr solver):
607      - put coriolis term into FORCEX,Y (as in seaice_evp.F; previously in rhsU,V only);
608        update output (change truncation) of FWD test exp lab_sea & global_ocean.cs32x15
609      - fix SEAICEuseFREEDRIFT for new OBCS version (ndef OBCS_UVICE_OLD)
610      - new parameter "LSR_mixIniGuess" allows (if=2,4) to mix free-drift solution
611        into initial guess for linearised solver; use weight ~ (1/err)^2,4.
612      - compute (with new S/R) and print initial (+ free-driff sol. if available)
613        and final residual of linearised system.
614    o pkg/pp81: add diagnostics for vertical eddy viscosity and diffusivity
615      (requires new subroutines pp81_init_fixed.F/pp81_diagnostics_init.F)
616    o pkg/obcs: Stevens BCs (still only for east and west)
617      - fix Stevens BCs by using intermediate velocities of previous
618        time step as "baroclinic" contribution rather velocity of one grid cell
619        inside the boundaries; more consistent but makes the entire treatment
620        more complicated, requires new pickup files and two new S/Rs:
621        obcs_copy_uv_n and obcs_save_uv_n
622        keep old version with flag OBCS_STEVENS_USE_INTERIOR_VELOCITY
623        (undefined by default)
624      - silently move computation of some grid factors into separate loops to
625        save some recomputations
626      - add a hack for non-linear free surface
627      - add a verification experiment to exp4 that tests this code
628    o make gluemnc/xplodemnc work with (moron) non-GNU shell tools
629    
630    checkpoint63d (2011/10/25)
631    o pkg/obcs + seaice-dynamics:
632      - new implementation calls OBCS_APPLY_UVICE (in seaice_dynsolver.F) before
633        solving for uIce,vIce and prevent SEAICE_LSR or SEAICE_EVP to modify OB
634        values (consistent with an implicit method).
635      - add option OBCS_UVICE_OLD (in OBCS_OPTIONS.h, defined by default) to
636        return to older implementation (same results as before); note that none of
637        the "experimental" OBCS_SEAICE options are implemented in the new version.
638      - switch test exp. seaice_obcs to use new version (update output).
639    o pkg/seaice:
640      - add few stop (B-grid & CS-exch, B-grid & obcs, AUTODIFF & SEAICE_maskRHS)
641      - add parenthesis in Water-Ice drag calculations (evp & lsr);
642      - in seaice_lsr.F, simplify and fix AA3 setting in case sNx or sNy=1;
643        and fix case SEAICE_waterDrag=0 (but unstable if no or little seaice)
644      - update output of test exp lab_sea that uses evp or lsr (fwd+ad)
645        and global_ocean.cs32x15 (icedyn & seaice fwd+ad).
646    o pkg/layers:
647      - Include potential density as new coordinate (Thanks to David Munday)
648    o pkg/dic:
649      - Remove subroutine CALC_PCO2_APPROX_CO3 from carbon_chem.F and add
650        carbonate computation/output to CALC_PCO2_APPROX
651    o pkg/generic_advdiff
652      - make TAF generate code that vectorizes:
653        gad_dst3fl_adv_*.F, gad_u3c4_impl_r.F
654    o model/src:
655      - improve vectorization also for adjoint code of
656        solve_tridiagonal and solve_pentadiagonal. As this requires up to
657        5 new 3D-fields, this code is only turned on for the combination of
658        ALLOW_AUTODIFF_TAMC and TARGET_NEC_SX. Also remove error message
659        for singular matrix check (only for TARGET_NEC_SX).
660      - remove hard-wiring of CPP-flag ALLOW_SOLVERS_KLOOPINSIDE to
661        ALLOW_AUTODIFF. This flag now needs to be set outside of
662        solve_tri/pentadiagonal.F
663    o pkg/exf:
664      - fix previous modif in exf_readparms.F (revision 1.66: treatment of
665        optional namelist EXF_NML_OBCS).
666      - add many debug-print (to trace down where pkg/cal error msg comes from)
667    o pkg/mom_vecinv/mom_vi_hdissip.F
668      - rearrange loops so that vectorization is improved and in particular
669        the adjoint routine vectorizes. The code is a little longer now, but I
670        think easier to read.
671        Note: CPP-flag MOM_VI_ORIGINAL_VISCA4 is not tested.
672    o pkg/seaice:
673      - allow to specify initial seaice velocity from files (uIceFile,vIceFile)
674    o pkg/exch2:
675      - alternative code (without tile x tile matrix) for cumulated (global) sum;
676        used as default; keep using matrix version in adjustment.cs-32x32x1.
677    o tools/build_options:
678      - after merging some MPI and/or multi-threads specific optfiles so that
679        the modified default optfile support both built (using genmake2 -mpi
680        for the MPI built, using genmake2 -omp for OpenMP built),
681        move now obsolete optfiles to tools/build_options/unsupported/
682       (add copy of email sent to support list in doc/optfiles_changes.txt)
683    
684    checkpoint63c (2011/09/28)
685    o pkg/ebm:
686      - fix ebm_zonalmean.F for several procs in Ydir (nPy > 1); update output of
687        test exp. global_ocean_ebm (affects machine truncation, 12 digits for cg2d)
688    o pkg/seaice (SItracer pickup)
689    * Simple code for pickup of SItracer fields (#define ALLOW_SITRACER)
690      To be done:
691      - thorough testing of missing fields in S/R seaice_read_pickup
692      - thorough matching between generic tracers and specific fields used
693        (e.g. volume-weighted age, area-weighted age, salinity, ...)
694    o pkg/grdchk:
695      - all procs calculate and print finite-difference gradient (for testreport)
696      - change description output used by testreport;
697      - AD testing: also compare and report Finite-difference gradient;
698        => update all output_adm*.txt
699    o test exp. global_ocean_ebm:
700      - switch back useRealFreshWaterFlux (no problem anymore with run-off);
701        and turn on exactConserve; update (fwd) output.
702    o pkg/seaice (LSR):
703      - print to STDOUT number of solver iterations at SEAICE_monFreq interval.
704      - modify solver to deal cleanly with u/v switch at face edges (CS-grid):
705        * identical results with non-CS topology (but save up to half of EXCH calls)
706        * no much changes in cs-32 verification tests since no ice at face edges
707         (differences due to convergence criteria, since nb of iterations changed)
708        * expect some differences on lat-lon-cap grid.
709        update FWD results of global_ocean.cs32x15 test exp. (icedyn & seaice)
710  o pkg/exch2:  o pkg/exch2:
711    - add new CPP option to disable Cumul-Sum matrix (to save storage when using    - add new CPP option to disable Cumul-Sum matrix (to save storage when using
712      many tiles); until alternative coding is added, just add a stop.      many tiles); until alternative coding is added, just add a stop.

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