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revision 1.1578 by mlosch, Fri Jan 20 15:49:11 2012 UTC revision 1.1637 by jmc, Mon Mar 26 19:54:58 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/exch2:
8      - add argument "updateCorners" to S/R exch2_get_uv_bounds (enable to
9        activate EXCH_IGNORE_CORNERS in vector EXCH S/R).
10      - switch 1rst EXCH call to IGNORE_CORNERS (instead of UPDATE_CORNERS)
11        but keep the 2nd with UPDATE_CORNERS: this prevents overwriting good data
12        with bad ones coming from a not-yet-updated halo.
13        This should fix the problem when sNx <> sNy and GCD(sNx,sNy) < 2*Olx.
14    o pkg/frazil:
15        move FrzForcT diag from frazil_diagnostics_state.F to frazil_calc_rhs.F
16        http://mitgcm.org/pipermail/mitgcm-devel/2012-March/005384.html
17    o model/src/config_check.F: add a check for OLx>sNx/OLy>sNy
18    o verification/lab_sea
19      * #undef SEAICE_EXCLUDE_FOR_EXACT_AD_TESTING
20      * #define ALLOW_SST_CONTROL & ALLOW_SST_CONTROL
21      * nTimeSteps 3 -> 4
22      * changed reference output accordingly
23    o pkg/ctrl:
24      * fix ctrl_get_gen for xx_sst, xx_sss
25    o pkg/fizhi:
26      - fix 2 calls to S/R GRD2MSC (argument igrd) in update_earth_exports.F
27        update results of exp. fizhi-cs-32x32x40 (fail with only 6 digits for cg2d)
28      - by default, use new version of S/R GETPWHERE (#define TRY_NEW_GETPWHERE);
29        fix few out-of-bounds indices in referencing vars (initialise igrd to 1);
30        clean-up fizhi_turb.F (remove unused & uninitialised qdiaglsm array).
31    o pkg/gmredi:
32      - add diagnostic of Redi (main diagnonal) vertical diffusive flux of Temp
33    o pkg/fizhi:
34      - fix few initialisation and multi-tile Pb: aqualev & gridalt now pass the
35        (old)aces open64 tuv test.
36    o pkg/icefront: fix bug and reorder loop in icefront_init_varia.F
37    o pkg/mom_vecinv:
38      - fix 1 loop range in mom_vecinv.F to be like all the other loops which
39        set/update gu,gv/Diss (fix Pb of uninitialised fVerUkp in admom_vecinv
40        with non-lin free-surf).
41    o model/src: move k-loop outside of i/j-loops when (re-)computing R_low
42      in ini/update_masks_etc.F in order to avoid -O3 optimization problems with
43      some compilers (gfortran 4.6.0 on MacOS)
44    o momentum:
45      - separate fVer?(:,:,kUp) & fVer?(:,:,kDown) in argument list of MOM_FLUXFORM
46        & MOM_VECINV subroutines (to help TAF). This fixes Pb of uninitialised
47        fVer?(kUp) in admom_fluxform with non-lin free-surf or bottom control.
48    
49    checkpoint63k (2012/03/17)
50    o model/src:
51       - selectAddFluid (ALLOW_ADDFLUID): add missing term in horizontal momentum
52         flux-form (mom_fluxform.F) and vertical momentum (calc_gw.F) equations.
53       - SOLVE_DIAGONAL: switch default to use adjoinable & vectorized version
54         (#undef SOLVE_DIAGONAL_LOWMEMORY); update output of exp. front_relax.bvp.
55    o model/src: solve_*diagonal.F
56       - replace division with multiplication by inverse (similar to original version)
57         update output of AD exp. global_ocean.90x40x15.
58       - fix pkg/gmredi/gmredi_calc_psi_bvp.F & pkg/ggl90/ggl90_calc.F
59         to enable the use of the vectorized & differentiable solve_tridiagonal.F
60       - test exp. global_ocean.90x40x15/input_ad: switch to advection scheme 20 for
61         vertical advection (to get solve_tridiagonal tested in AD mode).
62    o pkg/seaice: ECCO-CLIVAR merge:
63      1. seaice AREA relaxation
64         * CPP option: SEAICE_ALLOW_AREA_RELAXATION
65         * runtime flag: SEAICE_tauAreaObsRelax
66      2. modified global mean cost imbalance code: CPP option
67          ALLOW_SSH_GLOBMEAN_COST_CONTRIBUTION
68    o another iteration on solve_*diagonal.F
69       Make choices independent of AUTODIFF
70       Default will be the adjoinable vectorized version.
71       Alternative choices are:
72       * non-adjoinable original version with low memory footprint:
73         #define SOLVE_DIAGONAL_LOWMEMORY
74       * still adjoinable but does not vectorize (k as inner-most loop):
75         #define SOLVE_DIAGONAL_KINNER (keeping SOLVE_DIAGONAL_LOWMEMORY undef)
76    o testreport
77     - add option to use a home made wrapper around "make"
78     - remove MITGCM_IEEE env. variable (no longer active)
79    o pkg/shelfice
80     - improve computation of friction velocity for velocity dependent
81       exchange coefficients: include velocities into SHELFICEBoundaryLayer
82       block to average velocities vertically
83     - add TAF store directives for SHI_ALLOW_GAMMAFRICT
84    o Modify diagonal solvers, now three versions (upon request):
85      #ifndef SOLVE_DIAGONAL_AUTODIFF
86        1. default version (dating back a while ago)
87      #else /* def SOLVE_DIAGONAL_AUTODIFF */
88      # ifdef SOLVE_DIAGONAL_KINNER
89        2. adjoinable version with k-innermost loop (G. Forget)
90      # else
91        3. adjoinable vectorized version of 2.
92      # endif
93      #endif /* SOLVE_DIAGONAL_AUTODIFF */
94      All flags are currently set within routines, but could/should be moved to CPP-options.
95      Array bounds for 1. are as before, for 2.,3. cover the entire domain
96      (could be changed for 1. too).
97    o verification/lab_sea (fwd):
98      - update the 4 fwd lab_sea test experiment: no longer SEAICE_GROWTH_LEGACY,
99        use 7 categories (except hb87), new solve4temp params (except salt_plume),
100        constant salinity (=4) or variable salinity (salt_plume) done through
101        SItracer.
102    o pkg/seaice:
103      - rename parameters: SIsalFrac to SEAICE_saltFrac & SIsal0 to SEAICE_salt0;
104      - remove old parameters ( SEAICE_freeze, SEAICEturbFluxFormula, SEAICE_gamma_t,
105         SEAICE_gamma_t_frz, SEAICE_availHeatTaper & SEAICE_availHeatFracFrz)
106        from SEAICE_PARMS.h ; still need to fix seaice_cost_sst.F (broken when
107        SEAICE_freeze got retired) but already better than previously with
108        SEAICE_freeze=123456.7 deg.C;
109      - move setting of facOpenGrow/Melt from SEAICE_INIT_FIXED to SEAICE_READPARMS
110        (safer multi-threaded setting); always set SEAICEuseEVP;
111      - setting of ocean-ice turb. flux coeff: moved from SEAICE_CHECK to
112        SEAICE_READPARMS & SEAICE_INIT_FIXED (this fixes wrong summary report);
113        stop if multiple specifications for the same coeff; make sure default
114        SEAICE_mcPheePiston is compatible with drF(1) & deltaT.
115    o pkg/obcs:
116      - allow to switch to upwind 1rst order advection scheme for the advective
117        flux computation at the open-boundary; disabled for adjoint built.
118    o pkg/ptracers:
119      - rename PTRACERS_RESTART.h -> PTRACERS_START.h
120      - rename ptracers_fields_blocking_exchanges.F -> ptracers_fields_blocking_exch.F
121      - add parameter to decide when to start a tracer; use internal flag to
122        know which tracer to step-forward; switch this internal flag at the top
123        of forward_step.F (new S/R PTRACERS_SWITCH_ONOFF); for now, not enabled
124        for adjoint built.
125    o pkg/seaice:
126      - add SEAICE_SIZE.h anywhere in the code where SEAICE.h is included ;
127      - move MULTDIM declaration and setting from SEAICE.h to SEAICE_SIZE.h ;
128      - keep experiment offline_exf_seaice truly single category (set MULTDIM=1).
129    o pkg/ecco:
130      - fix writing of output file DiagnosCost_ClimSalt/Theta
131        and DiagnosCost_DriftSalt/Theta (if multi-tiles per proc).
132    o pkg/seaice:
133      - add missing initialisation of COR_ICE array in dynsolver.F
134      - merging SEAICE_MULTICATEGORY define and undef cases. Now the same code is
135        compiled either way, and is tested in all exps (multidim was only tested
136        in lab_sea ad before).
137      - cosmetic change to prepare for future addition of ITD. no change to results.
138        no defaults change.
139      - added run time param SEAICE_multDim (7 for SEAICE_MULTICATEGORY, 1 otherwise).
140      - by lack of adequate verification experiments, I further used custom versions
141        of global_ocean.cs32x15 to test multicat or not, with pickup or not. All
142        should be correct.
143      - avoid recomputations in ad.
144    o array initialisation in adjoint mode:
145      1) pkg/mom_common/mom_calc_ke.F:
146        add full array initialisation of KE inside mom_calc_ke.F (ALLOW_AUTODIFF_TAMC):
147        The S/R which calls MOM_CALC_KE initialises KE but in some recomputation
148        part this initialisation is gone, resulting in Floating Point Exception
149        (caught by open64 compiler with debug option).
150      2) model/src/convective_weights.F
151        set output convectCount over the full array range (instead of doing
152        an update): this fix a similar issue when called within recomputation (adjoint)
153        which could by-pass the initialisation (normally done in the caller S/R).
154    o pkg/seaice:
155      - final version of turbulent flux params, as agreed at MIT ice meet:
156           SEAICE_mcPheePiston (default is ~ 0.000875)
157           SEAICE_mcPheeTaper (default is 0.)
158           SEAICE_frazilFrac (defualt is 1.)
159           SEAICE_mcPheeStepFunc (default is false)
160      - changes results at trunction error level
161      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
162    o added pkg/frazil:
163      - see frazil_description.tex for details
164      - verification experiment is global_with_exf/input.yearly; changes output.yearly.txt
165    o pkg/shelfice/shelfice_thermodynamics.F
166      - fix exponents for velocity dependent exchange coefficients: change
167        from 2/3(=0) to 0.66666666666666667
168      - move computation of velocity dependent exchange coefficients into
169        separate loop, so that it applies to both thermodynamics
170      - move some divisions by constants out of loops
171    
172    checkpoint63j (2012/02/16)
173    o pkg/seaice:
174      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
175      - SItracer:  added run time params, and allow coupling to ocn salinity.
176    o pkg/seaice: remove (almost) all divisions by constants within loops
177      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
178      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
179      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
180      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
181    o pkg/seaice :
182      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
183        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
184      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
185      - add permanent SItflux diag that corresponds to TFLUX but includes
186        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
187      - allow activation/testing of a fix for suspected missing term in
188        ocn-ice heat budget (to be confirmed). To test this, you want to
189        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
190        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
191      - no change in results, fwd or ad.
192    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
193      - switch to variable freezing point.
194           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
195      - bug fix : the sublimation term that was missing is now activated.
196           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
197      - bug fix : flooding sign term for SIsal0.NE.0.
198           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
199    o pkg/seaice:
200      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
201        is now the default, and the old default constant freezing point is recovered
202        with SEAICE_tempFrz0    = -1.96,
203             SEAICE_dTempFrz_dS = 0.,
204      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
205      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
206      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
207        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
208      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
209        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
210      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
211        seaice_growth r149 for legacy branch (no results change).
212      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
213        from I. Fenty).
214      - results did not change except for global_ocean.cs32x15, mostly due to the
215        switch to variable freezing point (see above item for detail).
216    o pkg/thsice:
217      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
218        seawater freezing in thsice_calc_thickn (not used).
219    o pkg/seaice: turbulent flux term specification via run time params.
220      - replace CPP switches with run time switches to facilitate testing
221      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
222                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
223      - added runtime parameter : SEAICEturbFluxFormula
224      - move Mcphee constants to SEAICE_PARAMS.h
225      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
226                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
227                 remove seaice_summary call (moved to seaice_init_fixed)
228      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
229        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
230      - seaice_summary.F : add missing report of read turbulent flux term set up
231                           and SITRACER.
232      - seaice_check.F : check range; inform and stop if retired CPPs are used
233                         (incl. SEAICE_AGE).
234      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
235             CPP switch, same computation as before for the different options.
236      - change results at the truncation level.
237    o pkg/seaice:
238      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
239        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
240        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
241      - update verification/*/input*/data.seaice:
242        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
243        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
244        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
245        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
246    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
247      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
248        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
249        difference in results only due to machine truncation.
250      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
251        MaykutPolySatVap; keep MIN_LWDOWN.
252      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
253      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
254        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
255    o pkg/salt_plume:
256      - isolate saltPlumeFlux array exch into a specific S/R called from
257        do_oceanic_phys.F
258      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
259    o verification:
260      - move untested set-up to MITgcm_contrib/verification_other.
261    o pkg/seaice:
262      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
263    o pkg/seaice:
264      - seaice_solve4temp.F (keeping results unchanged):
265        * add 2 future run-time params to select which saturation vapor pressure
266          formula is used and how post-iteration fluxes are set.
267          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
268        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
269          the linearized expression to stay consistent with tsurf finding.
270      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
271        can be < 0.
272    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
273      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
274        conductive heat flux F_c , and add it explicitly when updating tsurf as
275        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
276        so that now F_ia has a consistent meaning through the entire routine.
277        This causes differences at truncation level: update output of fwd exp.
278        global_ocean.cs32x15.seaice.
279    o pkg/seaice:
280      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
281        of arrays, sign/direction of fluxes; no effect on results.
282      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
283        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
284        note: this should have been done before changing celsius2K default.
285      - to keep results unchanged, add back old value of celsius2K in verification
286        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
287      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
288        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
289        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
290        freezing temp is consistent with value in seaice_growth.F ; this causes
291        differences at machine truncation level: update lab_sea AD output (3/4).
292    o pkg/seaice:
293      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
294        and climsst/sss even when using seaice (to prevent calculation that might
295        use SST on land); does not affect any verification exp.
296      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
297        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
298    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
299      over land (non-legacy code)
300    o vectorize salt_plume package:
301      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
302      - this code computes plumebk everywhere (also over land), thus requires
303        code to avoid divisions by zero and catch the case of kLev=Nr.
304      - efficiency of salt_plume_frac is still sub-optimal
305    o tools (genmake2):
306      - fix makefile NAME specification (option: -makefile NAME) by adding
307        "-f $MAKEFILE" in few places where it was missing including makedepend
308        command (contribution from Paul).
309    
310    checkpoint63i (2012/01/24)
311    o model/src:
312      - add factorized versions of some EOS code to find_rho.F,
313        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
314    o model/src:
315      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
316      - change default celsius2K from 273.16 to 273.15
317      - to keep results unchanged, add back old value of celsius2K in verification
318        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
319         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
320  o model/src: add a little initialisation trick to find_rho.F and find_alpha.F  o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
321    to make TAF generate vectorizable code    to make TAF generate vectorizable code
322  o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.  o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.

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