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revision 1.1552 by mlosch, Mon Dec 19 11:51:22 2011 UTC revision 1.1600 by gforget, Thu Feb 16 01:40:04 2012 UTC
# Line 3  $Name$ Line 3  $Name$
3    
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    o pkg/seaice: overhaul of seaice_summary.F after jan 2012 clean-up of seaice_growth.F etc.
7    o pkg/seaice SItracer :  added run time params, and allow coupling to ocn salinity.
8    o pkg/seaice: remove (almost) all divisions by constants within loops
9      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
10      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
11      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
12      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
13    o pkg/seaice :
14      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula.EQ.
15      1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
16      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
17      - add permanent SItflux diag that corresponds to TFLUX but includes
18      ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
19      - allow activation/testing of a fix for suspected missing term in
20      ocn-ice heat budget (to be confirmed). To test this, you want to
21      undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
22      SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
23      - no change in results, fwd or ad.
24    o global_ocean.cs32x15/results: three changes following from the pkg/seaice commit below.
25      - switch to variable freezing point.
26           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
27      - bug fix : the sublimation term that was missing is now activated.
28           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
29      - bug fix : flooding sign term for SIsal0.NE.0.
30           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
31    o pkg/seaice:
32      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
33     is now the default, and the old default constant freezing point is recovered with
34     SEAICE_tempFrz0    = -1.96,
35     SEAICE_dTempFrz_dS = 0.,
36      - retire SEAICE_freeze that was the old way of specifycing the constant freezing point.
37      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
38      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
39     activated. To reproduce old results that had this bug define SEAICE_DISABLE_SUBLIM.
40      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
41     was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
42      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
43     seaice_growth r149 for legacy branch (no results change).
44      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code from I. Fenty).
45      - results did not change except for global_ocean.cs32x15, mostly due to the switch
46      to variable freezing point (see above item for detail).
47    o pkg/thsice:
48      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
49        seawater freezing in thsice_calc_thickn (not used).
50    o pkg/seaice: turbulent flux term specification via run time params.
51      - replace CPP switches with run time switches to facilitate testing
52      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX, GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
53      - added runtime parameter : SEAICEturbFluxFormula
54      - move Mcphee constants to SEAICE_PARAMS.h
55      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
56        SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply); remove
57        seaice_summary call (moved to seaice_init_fixed)
58      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
59        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
60      - seaice_summary.F : add missing report of read turbulent flux term set up (and SITRACER).
61      - seaice_check.F : check range; inform and stop if retired CPPs are used (incl. SEAICE_AGE).
62      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
63            CPP switch, same computation as before for the different options.
64      - change results at the truncation level.
65    o pkg/seaice:
66      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
67        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
68        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
69      - update verification/*/input*/data.seaice:
70        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
71        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
72        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
73        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
74    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
75      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
76        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
77        difference in results only due to machine truncation.
78      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
79        MaykutPolySatVap; keep MIN_LWDOWN.
80      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
81      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
82        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
83    o pkg/salt_plume:
84      - isolate saltPlumeFlux array exch into a specific S/R called from
85        do_oceanic_phys.F
86      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
87    o verification:
88      - move untested set-up to MITgcm_contrib/verification_other.
89    o pkg/seaice:
90      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
91    o pkg/seaice:
92      - seaice_solve4temp.F (keeping results unchanged):
93        * add 2 future run-time params to select which saturation vapor pressure
94          formula is used and how post-iteration fluxes are set.
95          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
96        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
97          the linearized expression to stay consistent with tsurf finding.
98      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
99        can be < 0.
100    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
101      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
102        conductive heat flux F_c , and add it explicitly when updating tsurf as
103        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
104        so that now F_ia has a consistent meaning through the entire routine.
105        This causes differences at truncation level: update output of fwd exp.
106        global_ocean.cs32x15.seaice.
107    o pkg/seaice:
108      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
109        of arrays, sign/direction of fluxes; no effect on results.
110      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
111        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
112        note: this should have been done before changing celsius2K default.
113      - to keep results unchanged, add back old value of celsius2K in verification
114        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
115      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
116        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
117        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
118        freezing temp is consistent with value in seaice_growth.F ; this causes
119        differences at machine truncation level: update lab_sea AD output (3/4).
120    o pkg/seaice:
121      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
122        and climsst/sss even when using seaice (to prevent calculation that might
123        use SST on land); does not affect any verification exp.
124      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
125        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
126    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
127      over land (non-legacy code)
128    o vectorize salt_plume package:
129      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
130      - this code computes plumebk everywhere (also over land), thus requires
131        code to avoid divisions by zero and catch the case of kLev=Nr.
132      - efficiency of salt_plume_frac is still sub-optimal
133    o tools (genmake2):
134      - fix makefile NAME specification (option: -makefile NAME) by adding
135        "-f $MAKEFILE" in few places where it was missing including makedepend
136        command (contribution from Paul).
137    
138    checkpoint63i (2012/01/24)
139    o model/src:
140      - add factorized versions of some EOS code to find_rho.F,
141        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
142    o model/src:
143      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
144      - change default celsius2K from 273.16 to 273.15
145      - to keep results unchanged, add back old value of celsius2K in verification
146        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
147         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
148    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
149      to make TAF generate vectorizable code
150    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
151       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
152       have flags that do this more efficiently.
153    o pkg/diagnostics/diagstats_calc.F
154      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
155    o pkg/obcs (with exch2):
156      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
157        and remove code (in obcs_readparms.F) which was based on EXCH of indices
158        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
159    o pkg/exf and seaice exp:
160      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
161        so that switching off area & heff advection flags does not affect results.
162      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
163      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
164        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
165        results of verification experiments: 1D_ocean_ice_column(fwd),
166        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
167        and offline_exf_seaice (all 4).
168    o pkg/seaice:
169      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
170        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
171      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
172        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
173        not multi-dim advection;
174      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
175        SHORTWAVE_HEATING #undef.
176    o optim: make Makefile more robust (?)
177    o pkg/obcs:
178      * fix treatment of obcs_read_pickup for TAF
179    o pkg/shelfice:
180      * add missing initialisation of num_shifwflx
181      * new adjoint verification exp. for isomip
182      * change Prandtl and Schmidt numbers from generic formulations
183        (in terms of model diffus. and visc.) to separate runtime
184        parameters, with Holland and Jenkins (1999) default values.
185    o pkg/exf (interpolation):
186      - extended input field (2 rows) near the N & S poles:
187        * fill in with the symetric value (when even Nb of data in longitude)
188        * add average value at the poles only for scalar quantities ; for vector
189          component interpolation, skip the averaging and keep duplicated values,
190          unless the 2 components have same location (uvInterp=T) in which case
191          interpolate the 2 components together using S/R EXF_INTERP_UV.
192      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
193        together: this allows to account properly for local orientation when
194        averaging at N & S pole.
195      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
196        exf-interpolation near N & S poles. Undef by default.
197      - add debug check/print on 1rst iter if debugLevel >=2.
198    o pkg/exf:
199      - change masking flags definition (no longer "parameter"), put them in
200        common block and set them in S/R EXF_INIT_FIXED.
201      - change recognized masking flag from s,u,v to c,w,s since the mask
202        to use (maskC,W,S) depends on position on model grid and has little to
203        do with scalar/vector difference; fix masking if using P-coordinates.
204      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
205        and update results of exp. global_with_exf (x2).
206      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
207    o pkg/obcs
208      - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
209    o pkg/exf (interpolation):
210      - assume periodicity in X only if input field cover full longitude range.
211      - improve search for lat. index (supposed to be faster, in ~log2(ny) steps,
212        and should vectorise).
213      - fix input lat of the 2 added row (in case we provide N.pole data).
214    
215    checkpoint63h (2011/12/30)
216    o pkg/seaice:
217      - change declaration of UVM from _RL to _RS in order to get B-grid
218        uIce,vIce monitor when _RS = real*4
219    o pkg/offline:
220      - new S/R OFFLINE_RESET_PARMS for resetting main-model params (switch off flags);
221      - compute vertical velocity if not read from file (switch on exactConserv
222        & staggerTimeStep);
223      - fix output of ptracer monitor iter & time for default PTRACERS_monitorFreq.
224    o verification:
225      - update grid-files (in tutorial_held_suarez_cs/input and fizhi-cs-32x32x40/input)
226        with grid-angle generated using "utils/matlab/cs_grid/cubeCalcAngle.m":
227        fix Pb in yG definition @ 2 missing corners (previously yG was averaged);
228      - update output of exp. global_ocean.cs32x15.viscA4 after changing
229        grid-file angles (used here for coriolis-3d);
230      - remove (or gzip) few files not needed to run fizhi-cs experiments.
231    o pkg/exf (vector interpolation):
232      - rotate vector component toward local grid-axis orientation using grid-angles
233        (stored in GRID.h) instead of locally computed rotation angle; keep old code
234        available with exf option EXF_USE_OLD_VEC_ROTATION (undef by default).
235    o pkg/seaice:
236      - allow to compile with exf options ALLOW_ATM_TEMP or ALLOW_DOWNWARD_RADIATION
237        undefined. Fix and remove the stop when ALLOW_RUNOFF is undefined.
238    o pkg/PKG_OPTIONS.h files:
239      - move #include "CPP_OPTIONS.h" just after #include "PACKAGES_CONFIG.h",
240        outside of the #ifdef ALLOW_THISPKG / #endif block.
241      - update verification/*/code/PKG_OPTIONS.h files.
242    o add a verification experiment (offline_exf_seaice/input.seaice) that test
243      the B-grid LSOR solver
244    o pkg/seaice: sort out emissivity and long wave radiation step 2:
245      - add emissivity for snow and ice as new run-time parameters
246        (unfortunately) that default to the corresponding exf values; this
247        changes results in most verification experiments so that for backward
248        compatibility these parameter have to be set explicitly to inconsistent
249        values (ugly);
250      - the exf-flag EXF_LWDOWN_WITH_EMISSIVITY then gets rid off the hard-wired
251        emissivities of 0.97 associated with lwdownloc in S/R seaice_solve4temp
252        until we agree how to handle this bug properly
253    o pkg/exf (interpolation):
254      - add a set of run-time param ({inputfield}_interpMethod), one for
255        each interpolated input field, to select the interpolation method
256        with a value of zero switching off the interpolation;
257      - print interpolation parameters to standard output;
258      - refine exf_check.F accordingly ; stop if USE_NO_INTERP_RUNOFF is defined
259        (to use instead runoff_interpMethod=0 in data.exf).
260      - simplify default setting of interpolation parameters (for all fields,
261        set position to match model grid cell-center position, leading to trivial
262        interpolation in case of regular Lat-Lon grid) and fix for the case of
263        non-uniform delY.
264    o pkg/exf/exf_radiation.F: add the factor ocean_emissivity to lwdown, for
265       within #ifdef EXF_LWDOWN_WITH_EMISSIVITY/#endif. Unless ocean_emissivity=1.
266       this factor is absolutely required, because the lw exitance (= out-going
267       long wave radiation) is emissivity*stefanBoltzmann*T^4 + rho*lwdown,
268       where the reflectivity rho = 1-emissivity for conservation reasons. Once
269       this is established, we can remove the CPP-Flag (if we want to).
270    o pkg/seaice:
271      - qualify a stop statement in S/R seaice_check: EXF_READ_EVAP and
272        ALLOW_BULKFORMULAE are only required if SEAICE_EXTERNAL_FLUXES is defined
273      - sort out emissivity and long wave radiation, step 1: make SEAICE_emissivity
274        what the name implies (and not emissivity*BoltzmannConstant), this means
275        the old default value of 5.5e-8 now means
276        5.5e-8/5.670e-8 = 0.97001763668430343479 as ocean_emissivity in
277        S/R exf_readparms
278      - FV-discretization of the B-grid LSOR solver, turn on with
279        SEAICE_LSRBNEW. This new solver also involves a slight re-organization
280        of the calling routine dynsolver, so that B and C-grid code look a
281        little more alike.
282      - fix index bugs in ostres.F (B-grid code)
283    o pkg/seaice/seaice_ocean_budget.F: change (unused) code to make it look better
284  o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the  o pkg/seaice/seaice_readparms.F: make ocean_emissivity*stefanBoltzmann the
285    default for SEAICE_emissivity, if useEXF; requires setting a wrong    default for SEAICE_emissivity, if useEXF; requires setting a wrong
286    parameter value in global_ocean.cs32x15/input.seaice/data.seaice for    parameter value in global_ocean.cs32x15/input.seaice/data.seaice for
# Line 20  o pkg/seaice/seaice_growth.F: Line 297  o pkg/seaice/seaice_growth.F:
297  o pkg/seaice/seaice_model.F:  o pkg/seaice/seaice_model.F:
298    Remove this patholigical case treatment in evolution branch,    Remove this patholigical case treatment in evolution branch,
299    where it is un-necessary and breaks conservation.    where it is un-necessary and breaks conservation.
300    Update global_ocean.cs32x15/results accordingly for    Update global_ocean.cs32x15/results accordingly for
301    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
302  o model/src:  o model/src:
303    useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in    useRealFreshWaterFlux: remove masking of EmPmP (using maskInC) in
304    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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