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revision 1.1551 by jmc, Fri Dec 16 22:57:31 2011 UTC revision 1.1605 by dimitri, Sat Mar 3 16:04:38 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 :
8      - final version of turbulent flux params, as agreed at MIT ice meet:
9           SEAICE_mcPheePiston (default is ~ 0.000875)
10           SEAICE_mcPheeTaper (default is 0.)
11           SEAICE_frazilFrac (defualt is 1.)
12           SEAICE_mcPheeStepFunc (default is false)
13      - changes results at trunction error level
14      - ifdef SEAICE_EXTERNAL_FLUXES, disallow SEAICE_waterAlbedo
15    o added pkg/frazil - see frazil_description.tex for details
16    o pkg/shelfice/shelfice_thermodynamics.F
17      - fix exponents for velocity dependent exchange coefficients: change
18        from 2/3(=0) to 0.66666666666666667
19      - move computation of velocity dependent exchange coefficients into
20        separate loop, so that it applies to both thermodynamics
21      - move some divisions by constants out of loops
22    
23    checkpoint63j (2012/02/16)
24    o pkg/seaice:
25      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
26      - SItracer:  added run time params, and allow coupling to ocn salinity.
27    o pkg/seaice: remove (almost) all divisions by constants within loops
28      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
29      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
30      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
31      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
32    o pkg/seaice :
33      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
34        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
35      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
36      - add permanent SItflux diag that corresponds to TFLUX but includes
37        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
38      - allow activation/testing of a fix for suspected missing term in
39        ocn-ice heat budget (to be confirmed). To test this, you want to
40        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
41        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
42      - no change in results, fwd or ad.
43    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
44      - switch to variable freezing point.
45           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
46      - bug fix : the sublimation term that was missing is now activated.
47           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
48      - bug fix : flooding sign term for SIsal0.NE.0.
49           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
50    o pkg/seaice:
51      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
52        is now the default, and the old default constant freezing point is recovered
53        with SEAICE_tempFrz0    = -1.96,
54             SEAICE_dTempFrz_dS = 0.,
55      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
56      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
57      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
58        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
59      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
60        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
61      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
62        seaice_growth r149 for legacy branch (no results change).
63      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
64        from I. Fenty).
65      - results did not change except for global_ocean.cs32x15, mostly due to the
66        switch to variable freezing point (see above item for detail).
67    o pkg/thsice:
68      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
69        seawater freezing in thsice_calc_thickn (not used).
70    o pkg/seaice: turbulent flux term specification via run time params.
71      - replace CPP switches with run time switches to facilitate testing
72      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
73                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
74      - added runtime parameter : SEAICEturbFluxFormula
75      - move Mcphee constants to SEAICE_PARAMS.h
76      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
77                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
78                 remove seaice_summary call (moved to seaice_init_fixed)
79      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
80        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
81      - seaice_summary.F : add missing report of read turbulent flux term set up
82                           and SITRACER.
83      - seaice_check.F : check range; inform and stop if retired CPPs are used
84                         (incl. SEAICE_AGE).
85      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
86             CPP switch, same computation as before for the different options.
87      - change results at the truncation level.
88    o pkg/seaice:
89      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
90        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
91        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
92      - update verification/*/input*/data.seaice:
93        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
94        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
95        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
96        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
97    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
98      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
99        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
100        difference in results only due to machine truncation.
101      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
102        MaykutPolySatVap; keep MIN_LWDOWN.
103      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
104      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
105        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
106    o pkg/salt_plume:
107      - isolate saltPlumeFlux array exch into a specific S/R called from
108        do_oceanic_phys.F
109      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
110    o verification:
111      - move untested set-up to MITgcm_contrib/verification_other.
112    o pkg/seaice:
113      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
114    o pkg/seaice:
115      - seaice_solve4temp.F (keeping results unchanged):
116        * add 2 future run-time params to select which saturation vapor pressure
117          formula is used and how post-iteration fluxes are set.
118          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
119        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
120          the linearized expression to stay consistent with tsurf finding.
121      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
122        can be < 0.
123    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
124      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
125        conductive heat flux F_c , and add it explicitly when updating tsurf as
126        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
127        so that now F_ia has a consistent meaning through the entire routine.
128        This causes differences at truncation level: update output of fwd exp.
129        global_ocean.cs32x15.seaice.
130    o pkg/seaice:
131      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
132        of arrays, sign/direction of fluxes; no effect on results.
133      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
134        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
135        note: this should have been done before changing celsius2K default.
136      - to keep results unchanged, add back old value of celsius2K in verification
137        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
138      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
139        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
140        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
141        freezing temp is consistent with value in seaice_growth.F ; this causes
142        differences at machine truncation level: update lab_sea AD output (3/4).
143    o pkg/seaice:
144      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
145        and climsst/sss even when using seaice (to prevent calculation that might
146        use SST on land); does not affect any verification exp.
147      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
148        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
149    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
150      over land (non-legacy code)
151    o vectorize salt_plume package:
152      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
153      - this code computes plumebk everywhere (also over land), thus requires
154        code to avoid divisions by zero and catch the case of kLev=Nr.
155      - efficiency of salt_plume_frac is still sub-optimal
156    o tools (genmake2):
157      - fix makefile NAME specification (option: -makefile NAME) by adding
158        "-f $MAKEFILE" in few places where it was missing including makedepend
159        command (contribution from Paul).
160    
161    checkpoint63i (2012/01/24)
162    o model/src:
163      - add factorized versions of some EOS code to find_rho.F,
164        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
165    o model/src:
166      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
167      - change default celsius2K from 273.16 to 273.15
168      - to keep results unchanged, add back old value of celsius2K in verification
169        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
170         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
171    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
172      to make TAF generate vectorizable code
173    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
174       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
175       have flags that do this more efficiently.
176    o pkg/diagnostics/diagstats_calc.F
177      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
178    o pkg/obcs (with exch2):
179      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
180        and remove code (in obcs_readparms.F) which was based on EXCH of indices
181        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
182    o pkg/exf and seaice exp:
183      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
184        so that switching off area & heff advection flags does not affect results.
185      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
186      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
187        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
188        results of verification experiments: 1D_ocean_ice_column(fwd),
189        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
190        and offline_exf_seaice (all 4).
191    o pkg/seaice:
192      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
193        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
194      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
195        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
196        not multi-dim advection;
197      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
198        SHORTWAVE_HEATING #undef.
199    o optim: make Makefile more robust (?)
200    o pkg/obcs:
201      * fix treatment of obcs_read_pickup for TAF
202    o pkg/shelfice:
203      * add missing initialisation of num_shifwflx
204      * new adjoint verification exp. for isomip
205      * change Prandtl and Schmidt numbers from generic formulations
206        (in terms of model diffus. and visc.) to separate runtime
207        parameters, with Holland and Jenkins (1999) default values.
208    o pkg/exf (interpolation):
209      - extended input field (2 rows) near the N & S poles:
210        * fill in with the symetric value (when even Nb of data in longitude)
211        * add average value at the poles only for scalar quantities ; for vector
212          component interpolation, skip the averaging and keep duplicated values,
213          unless the 2 components have same location (uvInterp=T) in which case
214          interpolate the 2 components together using S/R EXF_INTERP_UV.
215      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
216        together: this allows to account properly for local orientation when
217        averaging at N & S pole.
218      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
219        exf-interpolation near N & S poles. Undef by default.
220      - add debug check/print on 1rst iter if debugLevel >=2.
221    o pkg/exf:
222      - change masking flags definition (no longer "parameter"), put them in
223        common block and set them in S/R EXF_INIT_FIXED.
224      - change recognized masking flag from s,u,v to c,w,s since the mask
225        to use (maskC,W,S) depends on position on model grid and has little to
226        do with scalar/vector difference; fix masking if using P-coordinates.
227      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
228        and update results of exp. global_with_exf (x2).
229      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
230    o pkg/obcs
231      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
232    o pkg/exf (interpolation):
233      - assume periodicity in X only if input field cover full longitude range.
234      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
235        and should vectorise).
236      - fix input lat of the 2 added row (in case we provide N.pole data).
237    
238    checkpoint63h (2011/12/30)
239    o pkg/seaice:
240      - change declaration of UVM from _RL to _RS in order to get B-grid
241        uIce,vIce monitor when _RS = real*4
242    o pkg/offline:
243      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
244      - compute vertical velocity if not read from file (switch on exactConserv
245        & staggerTimeStep);
246      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
247    o verification:
248      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
249        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
250        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
251      - update output of exp. global_ocean.cs32x15.viscA4 after changing
252        grid-file angles (used here for coriolis-3d);
253      - remove (or gzip) few files not needed to run fizhi-cs experiments.
254    o pkg/exf (vector interpolation):
255      - rotate vector component toward local grid-axis orientation using grid-angles
256        (stored in GRID.h) instead of locally computed rotation angle; keep old code
257        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
258    o pkg/seaice:
259      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
260        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
261    o pkg/PKG_OPTIONS.h files:
262      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
263        outside of the #ifdef ALLOW_THISPKG / #endif block.
264      - update verification/*/code/PKG_OPTIONS.h files.
265    o add a verification experiment (offline_exf_seaice/input.seaice) that test
266      the B-grid LSOR solver
267    o pkg/seaice: sort out emissivity and long wave radiation step 2:
268      - add emissivity for snow and ice as new run-time parameters
269        (unfortunately) that default to the corresponding exf values; this
270        changes results in most verification experiments so that for backward
271        compatibility these parameter have to be set explicitly to inconsistent
272        values (ugly);
273      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
274        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
275        until we agree how to handle this bug properly
276    o pkg/exf (interpolation):
277      - add a set of run-time param ({inputfield}_interpMethod), one for
278        each interpolated input field, to select the interpolation method
279        with a value of zero switching off the interpolation;
280      - print interpolation parameters to standard output;
281      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
282        (to use instead runoff_interpMethod=0 in data.exf).
283      - simplify default setting of interpolation parameters (for all fields,
284        set position to match model grid cell-center position, leading to trivial
285        interpolation in case of regular Lat-Lon grid) and fix for the case of
286        non-uniform delY.
287    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
288       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
289       this factor is absolutely required, because the lw exitance (= out-going
290       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
291       where the reflectivity rho = 1-emissivity for conservation reasons. Once
292       this is established, we can remove the CPP-Flag (if we want to).
293    o pkg/seaice:
294      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
295        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
296      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
297        what the name implies (and not emissivity*BoltzmannConstant), this means
298        the old default value of 5.5e-8 now means
299        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
300        S/R exf_readparms
301      - FV-discretization of the B-grid LSOR solver, turn on with
302        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
303        of the calling routine dynsolver, so that B and C-grid code look a
304        little more alike.
305      - fix index bugs in ostres.F (B-grid code)
306    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
307    o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
308      default for SEAICE_emissivity, if useEXF; requires setting a wrong
309      parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
310      backward compatiblity
311    o model/src: use sigmaR in calc_ivdc
312    
313  checkpoint63g (2011/12/16)  checkpoint63g (2011/12/16)
314  o pkg/seaice/seaice_growth.F:  o pkg/seaice/seaice_growth.F:
315    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 320  o pkg/seaice/seaice_growth.F:
320  o pkg/seaice/seaice_model.F:  o pkg/seaice/seaice_model.F:
321    Remove this patholigical case treatment in evolution branch,    Remove this patholigical case treatment in evolution branch,
322    where it is un-necessary and breaks conservation.    where it is un-necessary and breaks conservation.
323    Update global_ocean.cs32x15/results accordingly for    Update global_ocean.cs32x15/results accordingly for
324    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
325  o model/src:  o model/src:
326    useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in    useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
327    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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