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revision 1.1568 by mlosch, Tue Jan 3 11:07:12 2012 UTC revision 1.1595 by gforget, Mon Feb 13 16:38:08 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 global_ocean.cs32x15/results: three changes following from the pkg/seaice commit below.
8      - switch to variable freezing point.
9           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
10      - bug fix : the sublimation term that was missing is now activated.
11           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
12      - bug fix : flooding sign term for SIsal0.NE.0.
13           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
14    o pkg/seaice:
15      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
16     is now the default, and the old default constant freezing point is recovered with
17     SEAICE_tempFrz0    = -1.96,
18     SEAICE_dTempFrz_dS = 0.,
19      - retire SEAICE_freeze that was the old way of specifycing the constant freezing point.
20      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
21      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
22     activated. To reproduce old results that had this bug define SEAICE_DISABLE_SUBLIM.
23      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
24     was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
25      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
26     seaice_growth r149 for legacy branch (no results change).
27      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code from I. Fenty).
28      - results did not change except for global_ocean.cs32x15, mostly due to the switch
29      to variable freezing point (see above item for detail).
30    o pkg/thsice:
31      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
32        seawater freezing in thsice_calc_thickn (not used).
33    o pkg/seaice: turbulent flux term specification via run time params.
34      - replace CPP switches with run time switches to facilitate testing
35      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX, GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
36      - added runtime parameter : SEAICEturbFluxFormula
37      - move Mcphee constants to SEAICE_PARAMS.h
38      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
39        SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply); remove
40        seaice_summary call (moved to seaice_init_fixed)
41      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
42        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
43      - seaice_summary.F : add missing report of read turbulent flux term set up (and SITRACER).
44      - seaice_check.F : check range; inform and stop if retired CPPs are used (incl. SEAICE_AGE).
45      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
46            CPP switch, same computation as before for the different options.
47      - change results at the truncation level.
48    o pkg/seaice:
49      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
50        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
51        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
52      - update verification/*/input*/data.seaice:
53        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
54        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
55        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
56        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
57    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
58      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
59        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
60        difference in results only due to machine truncation.
61      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
62        MaykutPolySatVap; keep MIN_LWDOWN.
63      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
64      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
65        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
66    o pkg/salt_plume:
67      - isolate saltPlumeFlux array exch into a specific S/R called from
68        do_oceanic_phys.F
69      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
70    o verification:
71      - move untested set-up to MITgcm_contrib/verification_other.
72    o pkg/seaice:
73      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
74    o pkg/seaice:
75      - seaice_solve4temp.F (keeping results unchanged):
76        * add 2 future run-time params to select which saturation vapor pressure
77          formula is used and how post-iteration fluxes are set.
78          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
79        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
80          the linearized expression to stay consistent with tsurf finding.
81      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
82        can be < 0.
83    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
84      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
85        conductive heat flux F_c , and add it explicitly when updating tsurf as
86        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
87        so that now F_ia has a consistent meaning through the entire routine.
88        This causes differences at truncation level: update output of fwd exp.
89        global_ocean.cs32x15.seaice.
90    o pkg/seaice:
91      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
92        of arrays, sign/direction of fluxes; no effect on results.
93      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
94        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
95        note: this should have been done before changing celsius2K default.
96      - to keep results unchanged, add back old value of celsius2K in verification
97        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
98      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
99        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
100        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
101        freezing temp is consistent with value in seaice_growth.F ; this causes
102        differences at machine truncation level: update lab_sea AD output (3/4).
103    o pkg/seaice:
104      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
105        and climsst/sss even when using seaice (to prevent calculation that might
106        use SST on land); does not affect any verification exp.
107      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
108        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
109    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
110      over land (non-legacy code)
111    o vectorize salt_plume package:
112      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
113      - this code computes plumebk everywhere (also over land), thus requires
114        code to avoid divisions by zero and catch the case of kLev=Nr.
115      - efficiency of salt_plume_frac is still sub-optimal
116    o tools (genmake2):
117      - fix makefile NAME specification (option: -makefile NAME) by adding
118        "-f $MAKEFILE" in few places where it was missing including makedepend
119        command (contribution from Paul).
120    
121    checkpoint63i (2012/01/24)
122    o model/src:
123      - add factorized versions of some EOS code to find_rho.F,
124        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
125    o model/src:
126      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
127      - change default celsius2K from 273.16 to 273.15
128      - to keep results unchanged, add back old value of celsius2K in verification
129        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
130         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
131    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
132      to make TAF generate vectorizable code
133    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
134       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
135       have flags that do this more efficiently.
136    o pkg/diagnostics/diagstats_calc.F
137      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
138    o pkg/obcs (with exch2):
139      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
140        and remove code (in obcs_readparms.F) which was based on EXCH of indices
141        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
142    o pkg/exf and seaice exp:
143      - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
144        so that switching off area & heff advection flags does not affect results.
145      - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
146      - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
147        EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
148        results of verification experiments: 1D_ocean_ice_column(fwd),
149        global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
150        and offline_exf_seaice (all 4).
151    o pkg/seaice:
152      - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
153        remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
154      - fix bug: areaNm1 & hEffNm1 are needed in seaice_growth (SEAICE_GROWTH_LEGACY)
155        but were not filled when resp. SEAICEadvArea=F & SEAICEadvHeff=F and
156        not multi-dim advection;
157      - fix seaice_growth.F to compile with both SEAICE_GROWTH_LEGACY and
158        SHORTWAVE_HEATING #undef.
159    o optim: make Makefile more robust (?)
160    o pkg/obcs:
161      * fix treatment of obcs_read_pickup for TAF
162    o pkg/shelfice:
163      * add missing initialisation of num_shifwflx
164      * new adjoint verification exp. for isomip
165      * change Prandtl and Schmidt numbers from generic formulations
166        (in terms of model diffus. and visc.) to separate runtime
167        parameters, with Holland and Jenkins (1999) default values.
168    o pkg/exf (interpolation):
169      - extended input field (2 rows) near the N & S poles:
170        * fill in with the symetric value (when even Nb of data in longitude)
171        * add average value at the poles only for scalar quantities ; for vector
172          component interpolation, skip the averaging and keep duplicated values,
173          unless the 2 components have same location (uvInterp=T) in which case
174          interpolate the 2 components together using S/R EXF_INTERP_UV.
175      - new S/R EXF_INTERP_UV to interpolate the 2 components of a vector field
176        together: this allows to account properly for local orientation when
177        averaging at N & S pole.
178      - add CPP option EXF_USE_OLD_INTERP_POLE to recover old results regarding
179        exf-interpolation near N & S poles. Undef by default.
180      - add debug check/print on 1rst iter if debugLevel >=2.
181    o pkg/exf:
182      - change masking flags definition (no longer "parameter"), put them in
183        common block and set them in S/R EXF_INIT_FIXED.
184      - change recognized masking flag from s,u,v to c,w,s since the mask
185        to use (maskC,W,S) depends on position on model grid and has little to
186        do with scalar/vector difference; fix masking if using P-coordinates.
187      - fix masking of wind-stress (was wrong if interpolated or read on A-grid)
188        and update results of exp. global_with_exf (x2).
189      - fix setting of zenith-angle table when SHORTWAVE_HEATING is undef.
190  o pkg/obcs  o pkg/obcs
191    - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)    - S/R obcs_calc_stevens: fix a small bug (gammat -> gammas where appropriate)
192  o pkg/exf (interpolation):  o pkg/exf (interpolation):

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