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revision 1.1575 by jmc, Tue Jan 17 17:14:06 2012 UTC revision 1.1602 by mlosch, Thu Mar 1 23:58:43 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/shelfice/shelfice_thermodynamics.F
8      - fix exponents for velocity dependent exchange coefficients: change
9        from 2/3(=0) to 0.66666666666666667
10      - move computation of velocity dependent exchange coefficients into
11        separate loop, so that it applies to both thermodynamics
12      - move some divisions by constants out of loops
13    
14    checkpoint63j (2012/02/16)
15    o pkg/seaice:
16      - overhaul of seaice_summary.F after feb 2012 clean-up of seaice_growth.F etc.
17      - SItracer:  added run time params, and allow coupling to ocn salinity.
18    o pkg/seaice: remove (almost) all divisions by constants within loops
19      in seaice_growth.F and seaice_solve4temp.F, this changes (only) the cg2d
20      results of global_ocean.cs32x15.seaice from 16 to 11 digits (but only
21      those, caused by 1/QI -> recip_QI) -> update output.seaice.txt,
22      output_adm.seaice_dynmix.txt and also lab_sea: output_adm.evp.txt
23    o pkg/seaice :
24      - simplify McPhee tapering, and allow to use it with SEAICEturbFluxFormula
25        = 1 or 2, using newly added run time parameter SEAICE_availHeatTaper.
26      - fix d_AREAbyATM, d_AREAbyOCN, d_AREAbyICE diags I broke in r1.148.
27      - add permanent SItflux diag that corresponds to TFLUX but includes
28        ice+snow. Hence SItflux-TFLUX should match the ice+snow heat budget.
29      - allow activation/testing of a fix for suspected missing term in
30        ocn-ice heat budget (to be confirmed). To test this, you want to
31        undef SEAICE_DISABLE_HEATCONSFIX, and then set the run time param
32        SEAICEheatConsFix to .TRUE. that also allows the 'SIaaflux' diagnostic.
33      - no change in results, fwd or ad.
34    o global_ocean.cs32x15/results: 3 changes following from the pkg/seaice commit below:
35      - switch to variable freezing point.
36           Results change : cg2d -> 1 digits; ad -> 3-6-6 digits.
37      - bug fix : the sublimation term that was missing is now activated.
38           Results change : cg2d -> 2 digits; ad -> 8-6-6 digits.
39      - bug fix : flooding sign term for SIsal0.NE.0.
40           Result change : cg2d -> 8 digits; ad -> 11-12-9 digits.
41    o pkg/seaice:
42      - unified freezing point treatment : the old SEAICE_VARIABLE_FREEZING_POINT
43        is now the default, and the old default constant freezing point is recovered
44        with SEAICE_tempFrz0    = -1.96,
45             SEAICE_dTempFrz_dS = 0.,
46      - retire SEAICE_freeze (= the old way of specifycing the constant freezing point)
47      - remove ALLOW_SEAICE_FLOODING brackets; run time switch is already there.
48      - bug fix (thanks to M. Losch) : the sublimation term that was missing is now
49        activated. To reproduce old results with this bug define SEAICE_DISABLE_SUBLIM.
50      - bug fix (silly me) : flooding sign term (seaice_growth.F r 1.149line 1211)
51        was wrong for SIsal0.NE.0. Changes cs32x15 results (see above item for detail).
52      - bug fix (thanks to O. Jahn) : area loss for melting  got messed up in
53        seaice_growth r149 for legacy branch (no results change).
54      - introduce SEAICE_CAP_SUBLIM : caps sublimation heat flux in solve4temp (code
55        from I. Fenty).
56      - results did not change except for global_ocean.cs32x15, mostly due to the
57        switch to variable freezing point (see above item for detail).
58    o pkg/thsice:
59      - fix and simplify interface to salt_plume pkg ; diagnose directly amount of
60        seawater freezing in thsice_calc_thickn (not used).
61    o pkg/seaice: turbulent flux term specification via run time params.
62      - replace CPP switches with run time switches to facilitate testing
63      - retired CPPs : MCPHEE_OCEAN_ICE_HEAT_FLUX,
64                       GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
65      - added runtime parameter : SEAICEturbFluxFormula
66      - move Mcphee constants to SEAICE_PARAMS.h
67      - seaice_readparms.F : read turbulent flux term params (SEAICEturbFluxFormula;
68                 SEAICE_availHeatFrac/Frz, or SEAICE_gamma_t/_frz if apply);
69                 remove seaice_summary call (moved to seaice_init_fixed)
70      - seaice_init_fixed.F : set SEAICE_availHeatFrac/Frz depending on
71        SEAICEturbFluxFormula, and seaice_summary call (moved from seaice_readparms)
72      - seaice_summary.F : add missing report of read turbulent flux term set up
73                           and SITRACER.
74      - seaice_check.F : check range; inform and stop if retired CPPs are used
75                         (incl. SEAICE_AGE).
76      - seaice_growth.F : unified use of SEAICE_availHeatFrac/Frz, without
77             CPP switch, same computation as before for the different options.
78      - change results at the truncation level.
79    o pkg/seaice:
80      - remove un-used parameters LAD & MAX_TICE ; add new run-time parameters:
81        useMaykutSatVapPoly (default=F), postSolvTempIter (default=2) and
82        SEAICE_wetAlbTemp (default=-1e-3). Remove option SEAICE_SOLVE4TEMP_LEGACY.
83      - update verification/*/input*/data.seaice:
84        to reproduce previous results with former #defined SEAICE_SOLVE4TEMP_LEGACY
85        code, set useMaykutSatVapPoly=T & postSolvTempIter=0 ;
86        and to reproduce previous results with former non-SOLVE4TEMP_LEGACY code,
87        set SEAICE_wetAlbTemp=0 & SEAICE_snowThick=0.
88    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY):
89      - remove LEGACY code for solving for tsurf (A1,A2,A3) but maintain the same
90        algorithm (same choice: useMaykutPolySatVap=T, postSolvTempIter=0);
91        difference in results only due to machine truncation.
92      - remove MAX_TICE (tsurf is always =< TMELT anyway); keep MIN_TICE if using
93        MaykutPolySatVap; keep MIN_LWDOWN.
94      - adapt SEAICE_MODIFY_GROWTH_ADJ code (untested) to non-legacy formulation.
95      - update output of verification exp. lab_sea (4 fwd: 11 cg2d digits except hb87,
96        + 3 AD: 6 digits except evp) and offline_exf_seaice.seaice (12 digits).
97    o pkg/salt_plume:
98      - isolate saltPlumeFlux array exch into a specific S/R called from
99        do_oceanic_phys.F
100      - add interface to pkg/salt_plume (filling of saltPlumeFlux) in pkg/thsice.
101    o verification:
102      - move untested set-up to MITgcm_contrib/verification_other.
103    o pkg/seaice:
104      - retire old way of SEAICE_AGE. Now replaced with ALLOW_SITRACER.
105    o pkg/seaice:
106      - seaice_solve4temp.F (keeping results unchanged):
107        * add 2 future run-time params to select which saturation vapor pressure
108          formula is used and how post-iteration fluxes are set.
109          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
110        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
111          the linearized expression to stay consistent with tsurf finding.
112      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
113        can be < 0.
114    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
115      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
116        conductive heat flux F_c , and add it explicitly when updating tsurf as
117        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
118        so that now F_ia has a consistent meaning through the entire routine.
119        This causes differences at truncation level: update output of fwd exp.
120        global_ocean.cs32x15.seaice.
121    o pkg/seaice:
122      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
123        of arrays, sign/direction of fluxes; no effect on results.
124      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
125        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
126        note: this should have been done before changing celsius2K default.
127      - to keep results unchanged, add back old value of celsius2K in verification
128        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
129      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
130        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
131        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
132        freezing temp is consistent with value in seaice_growth.F ; this causes
133        differences at machine truncation level: update lab_sea AD output (3/4).
134    o pkg/seaice:
135      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
136        and climsst/sss even when using seaice (to prevent calculation that might
137        use SST on land); does not affect any verification exp.
138      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
139        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
140    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
141      over land (non-legacy code)
142    o vectorize salt_plume package:
143      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
144      - this code computes plumebk everywhere (also over land), thus requires
145        code to avoid divisions by zero and catch the case of kLev=Nr.
146      - efficiency of salt_plume_frac is still sub-optimal
147    o tools (genmake2):
148      - fix makefile NAME specification (option: -makefile NAME) by adding
149        "-f $MAKEFILE" in few places where it was missing including makedepend
150        command (contribution from Paul).
151    
152    checkpoint63i (2012/01/24)
153    o model/src:
154      - add factorized versions of some EOS code to find_rho.F,
155        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
156    o model/src:
157      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
158      - change default celsius2K from 273.16 to 273.15
159      - to keep results unchanged, add back old value of celsius2K in verification
160        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
161         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
162    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
163      to make TAF generate vectorizable code
164    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
165       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
166       have flags that do this more efficiently.
167    o pkg/diagnostics/diagstats_calc.F
168      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
169    o pkg/obcs (with exch2):
170      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
171        and remove code (in obcs_readparms.F) which was based on EXCH of indices
172        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
173  o pkg/exf and seaice exp:  o pkg/exf and seaice exp:
174    - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)    - change offline_exf_seaice.seaicetd test exp. to use default DIFF1 value (=0)
175      so that switching off area & heff advection flags does not affect results.      so that switching off area & heff advection flags does not affect results.
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