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revision 1.1551 by jmc, Fri Dec 16 22:57:31 2011 UTC revision 1.1597 by mlosch, Tue Feb 14 14:53:17 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/seaice: remove (almost) all divisions by constants within loops
8      in seaice_growth.F and seaice_solve4temp.F
9    o pkg/seaice :
10      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula.EQ.
11      1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
12      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
13      - add permanent SItflux diag that corresponds to TFLUX but includes
14      ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
15      - allow activation/testing of a fix for suspected missing term in
16      ocn-ice heat budget (to be confirmed). To test this, you want to
17      undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
18      SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
19      - no change in results, fwd or ad.
20    o global_ocean.cs32x15/results: three changes following from the pkg/seaice commit below.
21      - switch to variable freezing point.
22           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
23      - bug fix : the sublimation term that was missing is now activated.
24           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
25      - bug fix : flooding sign term for SIsal0.NE.0.
26           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
27    o pkg/seaice:
28      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
29     is now the default, and the old default constant freezing point is recovered with
30     SEAICE_tempFrz0    = -1.96,
31     SEAICE_dTempFrz_dS = 0.,
32      - retire SEAICE_freeze that was the old way of specifycing the constant freezing point.
33      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
34      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
35     activated. To reproduce old results that had this bug define SEAICE_DISABLE_SUBLIM.
36      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
37     was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
38      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
39     seaice_growth r149 for legacy branch (no results change).
40      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code from I. Fenty).
41      - results did not change except for global_ocean.cs32x15, mostly due to the switch
42      to variable freezing point (see above item for detail).
43    o pkg/thsice:
44      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
45        seawater freezing in thsice_calc_thickn (not used).
46    o pkg/seaice: turbulent flux term specification via run time params.
47      - replace CPP switches with run time switches to facilitate testing
48      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX, GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
49      - added runtime parameter : SEAICEturbFluxFormula
50      - move Mcphee constants to SEAICE_PARAMS.h
51      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
52        SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply); remove
53        seaice_summary call (moved to seaice_init_fixed)
54      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
55        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
56      - seaice_summary.F : add missing report of read turbulent flux term set up (and SITRACER).
57      - seaice_check.F : check range; inform and stop if retired CPPs are used (incl. SEAICE_AGE).
58      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
59            CPP switch, same computation as before for the different options.
60      - change results at the truncation level.
61    o pkg/seaice:
62      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
63        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
64        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
65      - update verification/*/input*/data.seaice:
66        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
67        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
68        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
69        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
70    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
71      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
72        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
73        difference in results only due to machine truncation.
74      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
75        MaykutPolySatVap; keep MIN_LWDOWN.
76      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
77      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
78        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
79    o pkg/salt_plume:
80      - isolate saltPlumeFlux array exch into a specific S/R called from
81        do_oceanic_phys.F
82      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
83    o verification:
84      - move untested set-up to MITgcm_contrib/verification_other.
85    o pkg/seaice:
86      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
87    o pkg/seaice:
88      - seaice_solve4temp.F (keeping results unchanged):
89        * add 2 future run-time params to select which saturation vapor pressure
90          formula is used and how post-iteration fluxes are set.
91          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
92        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
93          the linearized expression to stay consistent with tsurf finding.
94      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
95        can be < 0.
96    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
97      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
98        conductive heat flux F_c , and add it explicitly when updating tsurf as
99        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
100        so that now F_ia has a consistent meaning through the entire routine.
101        This causes differences at truncation level: update output of fwd exp.
102        global_ocean.cs32x15.seaice.
103    o pkg/seaice:
104      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
105        of arrays, sign/direction of fluxes; no effect on results.
106      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
107        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
108        note: this should have been done before changing celsius2K default.
109      - to keep results unchanged, add back old value of celsius2K in verification
110        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
111      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
112        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
113        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
114        freezing temp is consistent with value in seaice_growth.F ; this causes
115        differences at machine truncation level: update lab_sea AD output (3/4).
116    o pkg/seaice:
117      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
118        and climsst/sss even when using seaice (to prevent calculation that might
119        use SST on land); does not affect any verification exp.
120      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
121        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
122    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
123      over land (non-legacy code)
124    o vectorize salt_plume package:
125      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
126      - this code computes plumebk everywhere (also over land), thus requires
127        code to avoid divisions by zero and catch the case of kLev=Nr.
128      - efficiency of salt_plume_frac is still sub-optimal
129    o tools (genmake2):
130      - fix makefile NAME specification (option: -makefile NAME) by adding
131        "-f $MAKEFILE" in few places where it was missing including makedepend
132        command (contribution from Paul).
133    
134    checkpoint63i (2012/01/24)
135    o model/src:
136      - add factorized versions of some EOS code to find_rho.F,
137        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
138    o model/src:
139      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
140      - change default celsius2K from 273.16 to 273.15
141      - to keep results unchanged, add back old value of celsius2K in verification
142        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
143         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
144    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
145      to make TAF generate vectorizable code
146    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
147       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
148       have flags that do this more efficiently.
149    o pkg/diagnostics/diagstats_calc.F
150      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
151    o pkg/obcs (with exch2):
152      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
153        and remove code (in obcs_readparms.F) which was based on EXCH of indices
154        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
155    o pkg/exf and seaice exp:
156      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
157        so that switching off area & heff advection flags does not affect results.
158      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
159      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
160        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
161        results of verification experiments: 1D_ocean_ice_column(fwd),
162        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
163        and offline_exf_seaice (all 4).
164    o pkg/seaice:
165      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
166        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
167      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
168        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
169        not multi-dim advection;
170      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
171        SHORTWAVE_HEATING #undef.
172    o optim: make Makefile more robust (?)
173    o pkg/obcs:
174      * fix treatment of obcs_read_pickup for TAF
175    o pkg/shelfice:
176      * add missing initialisation of num_shifwflx
177      * new adjoint verification exp. for isomip
178      * change Prandtl and Schmidt numbers from generic formulations
179        (in terms of model diffus. and visc.) to separate runtime
180        parameters, with Holland and Jenkins (1999) default values.
181    o pkg/exf (interpolation):
182      - extended input field (2 rows) near the N & S poles:
183        * fill in with the symetric value (when even Nb of data in longitude)
184        * add average value at the poles only for scalar quantities ; for vector
185          component interpolation, skip the averaging and keep duplicated values,
186          unless the 2 components have same location (uvInterp=T) in which case
187          interpolate the 2 components together using S/R EXF_INTERP_UV.
188      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
189        together: this allows to account properly for local orientation when
190        averaging at N & S pole.
191      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
192        exf-interpolation near N & S poles. Undef by default.
193      - add debug check/print on 1rst iter if debugLevel >=2.
194    o pkg/exf:
195      - change masking flags definition (no longer "parameter"), put them in
196        common block and set them in S/R EXF_INIT_FIXED.
197      - change recognized masking flag from s,u,v to c,w,s since the mask
198        to use (maskC,W,S) depends on position on model grid and has little to
199        do with scalar/vector difference; fix masking if using P-coordinates.
200      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
201        and update results of exp. global_with_exf (x2).
202      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
203    o pkg/obcs
204      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
205    o pkg/exf (interpolation):
206      - assume periodicity in X only if input field cover full longitude range.
207      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
208        and should vectorise).
209      - fix input lat of the 2 added row (in case we provide N.pole data).
210    
211    checkpoint63h (2011/12/30)
212    o pkg/seaice:
213      - change declaration of UVM from _RL to _RS in order to get B-grid
214        uIce,vIce monitor when _RS = real*4
215    o pkg/offline:
216      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
217      - compute vertical velocity if not read from file (switch on exactConserv
218        & staggerTimeStep);
219      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
220    o verification:
221      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
222        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
223        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
224      - update output of exp. global_ocean.cs32x15.viscA4 after changing
225        grid-file angles (used here for coriolis-3d);
226      - remove (or gzip) few files not needed to run fizhi-cs experiments.
227    o pkg/exf (vector interpolation):
228      - rotate vector component toward local grid-axis orientation using grid-angles
229        (stored in GRID.h) instead of locally computed rotation angle; keep old code
230        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
231    o pkg/seaice:
232      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
233        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
234    o pkg/PKG_OPTIONS.h files:
235      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
236        outside of the #ifdef ALLOW_THISPKG / #endif block.
237      - update verification/*/code/PKG_OPTIONS.h files.
238    o add a verification experiment (offline_exf_seaice/input.seaice) that test
239      the B-grid LSOR solver
240    o pkg/seaice: sort out emissivity and long wave radiation step 2:
241      - add emissivity for snow and ice as new run-time parameters
242        (unfortunately) that default to the corresponding exf values; this
243        changes results in most verification experiments so that for backward
244        compatibility these parameter have to be set explicitly to inconsistent
245        values (ugly);
246      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
247        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
248        until we agree how to handle this bug properly
249    o pkg/exf (interpolation):
250      - add a set of run-time param ({inputfield}_interpMethod), one for
251        each interpolated input field, to select the interpolation method
252        with a value of zero switching off the interpolation;
253      - print interpolation parameters to standard output;
254      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
255        (to use instead runoff_interpMethod=0 in data.exf).
256      - simplify default setting of interpolation parameters (for all fields,
257        set position to match model grid cell-center position, leading to trivial
258        interpolation in case of regular Lat-Lon grid) and fix for the case of
259        non-uniform delY.
260    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
261       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
262       this factor is absolutely required, because the lw exitance (= out-going
263       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
264       where the reflectivity rho = 1-emissivity for conservation reasons. Once
265       this is established, we can remove the CPP-Flag (if we want to).
266    o pkg/seaice:
267      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
268        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
269      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
270        what the name implies (and not emissivity*BoltzmannConstant), this means
271        the old default value of 5.5e-8 now means
272        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
273        S/R exf_readparms
274      - FV-discretization of the B-grid LSOR solver, turn on with
275        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
276        of the calling routine dynsolver, so that B and C-grid code look a
277        little more alike.
278      - fix index bugs in ostres.F (B-grid code)
279    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
280    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
281      default for SEAICE_emissivity, if useEXF; requires setting a wrong
282      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
283      backward compatiblity
284    o model/src: use sigmaR in calc_ivdc
285    
286  checkpoint63g (2011/12/16)  checkpoint63g (2011/12/16)
287  o pkg/seaice/seaice_growth.F:  o pkg/seaice/seaice_growth.F:
288    fix heat conservation of the coupled ocean-seaice system.    fix heat conservation of the coupled ocean-seaice system.
# Line 14  o pkg/seaice/seaice_growth.F: Line 293  o pkg/seaice/seaice_growth.F:
293  o pkg/seaice/seaice_model.F:  o pkg/seaice/seaice_model.F:
294    Remove this patholigical case treatment in evolution branch,    Remove this patholigical case treatment in evolution branch,
295    where it is un-necessary and breaks conservation.    where it is un-necessary and breaks conservation.
296    Update global_ocean.cs32x15/results accordingly for    Update global_ocean.cs32x15/results accordingly for
297    output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt    output.seaice.txt output_adm.seaice.txt and output_adm.seaice_dynmix.txt
298  o model/src:  o model/src:
299    useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in    useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
300    external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.    external_forcing_surf.F and apply mask directly in S/R SOLVE_FOR_PRESSURE.

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