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revision 1.1578 by mlosch, Fri Jan 20 15:49:11 2012 UTC revision 1.1603 by dimitri, Fri Mar 2 01:45:22 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 added pkg/frazil - see frazil_description.tex for details
8    o pkg/shelfice/shelfice_thermodynamics.F
9      - fix exponents for velocity dependent exchange coefficients: change
10        from 2/3(=0) to 0.66666666666666667
11      - move computation of velocity dependent exchange coefficients into
12        separate loop, so that it applies to both thermodynamics
13      - move some divisions by constants out of loops
14    
15    checkpoint63j (2012/02/16)
16    o pkg/seaice:
17      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
18      - SItracer:  added run time params, and allow coupling to ocn salinity.
19    o pkg/seaice: remove (almost) all divisions by constants within loops
20      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
21      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
22      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
23      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
24    o pkg/seaice :
25      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
26        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
27      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
28      - add permanent SItflux diag that corresponds to TFLUX but includes
29        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
30      - allow activation/testing of a fix for suspected missing term in
31        ocn-ice heat budget (to be confirmed). To test this, you want to
32        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
33        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
34      - no change in results, fwd or ad.
35    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
36      - switch to variable freezing point.
37           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
38      - bug fix : the sublimation term that was missing is now activated.
39           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
40      - bug fix : flooding sign term for SIsal0.NE.0.
41           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
42    o pkg/seaice:
43      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
44        is now the default, and the old default constant freezing point is recovered
45        with SEAICE_tempFrz0    = -1.96,
46             SEAICE_dTempFrz_dS = 0.,
47      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
48      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
49      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
50        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
51      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
52        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
53      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
54        seaice_growth r149 for legacy branch (no results change).
55      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
56        from I. Fenty).
57      - results did not change except for global_ocean.cs32x15, mostly due to the
58        switch to variable freezing point (see above item for detail).
59    o pkg/thsice:
60      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
61        seawater freezing in thsice_calc_thickn (not used).
62    o pkg/seaice: turbulent flux term specification via run time params.
63      - replace CPP switches with run time switches to facilitate testing
64      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
65                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
66      - added runtime parameter : SEAICEturbFluxFormula
67      - move Mcphee constants to SEAICE_PARAMS.h
68      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
69                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
70                 remove seaice_summary call (moved to seaice_init_fixed)
71      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
72        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
73      - seaice_summary.F : add missing report of read turbulent flux term set up
74                           and SITRACER.
75      - seaice_check.F : check range; inform and stop if retired CPPs are used
76                         (incl. SEAICE_AGE).
77      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
78             CPP switch, same computation as before for the different options.
79      - change results at the truncation level.
80    o pkg/seaice:
81      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
82        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
83        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
84      - update verification/*/input*/data.seaice:
85        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
86        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
87        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
88        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
89    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
90      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
91        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
92        difference in results only due to machine truncation.
93      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
94        MaykutPolySatVap; keep MIN_LWDOWN.
95      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
96      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
97        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
98    o pkg/salt_plume:
99      - isolate saltPlumeFlux array exch into a specific S/R called from
100        do_oceanic_phys.F
101      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
102    o verification:
103      - move untested set-up to MITgcm_contrib/verification_other.
104    o pkg/seaice:
105      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
106    o pkg/seaice:
107      - seaice_solve4temp.F (keeping results unchanged):
108        * add 2 future run-time params to select which saturation vapor pressure
109          formula is used and how post-iteration fluxes are set.
110          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
111        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
112          the linearized expression to stay consistent with tsurf finding.
113      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
114        can be < 0.
115    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
116      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
117        conductive heat flux F_c , and add it explicitly when updating tsurf as
118        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
119        so that now F_ia has a consistent meaning through the entire routine.
120        This causes differences at truncation level: update output of fwd exp.
121        global_ocean.cs32x15.seaice.
122    o pkg/seaice:
123      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
124        of arrays, sign/direction of fluxes; no effect on results.
125      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
126        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
127        note: this should have been done before changing celsius2K default.
128      - to keep results unchanged, add back old value of celsius2K in verification
129        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
130      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
131        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
132        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
133        freezing temp is consistent with value in seaice_growth.F ; this causes
134        differences at machine truncation level: update lab_sea AD output (3/4).
135    o pkg/seaice:
136      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
137        and climsst/sss even when using seaice (to prevent calculation that might
138        use SST on land); does not affect any verification exp.
139      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
140        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
141    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
142      over land (non-legacy code)
143    o vectorize salt_plume package:
144      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
145      - this code computes plumebk everywhere (also over land), thus requires
146        code to avoid divisions by zero and catch the case of kLev=Nr.
147      - efficiency of salt_plume_frac is still sub-optimal
148    o tools (genmake2):
149      - fix makefile NAME specification (option: -makefile NAME) by adding
150        "-f $MAKEFILE" in few places where it was missing including makedepend
151        command (contribution from Paul).
152    
153    checkpoint63i (2012/01/24)
154    o model/src:
155      - add factorized versions of some EOS code to find_rho.F,
156        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
157    o model/src:
158      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
159      - change default celsius2K from 273.16 to 273.15
160      - to keep results unchanged, add back old value of celsius2K in verification
161        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
162         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
163  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
164    to make TAF generate vectorizable code    to make TAF generate vectorizable code
165  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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