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revision 1.1574 by jmc, Mon Jan 16 23:53:58 2012 UTC revision 1.1588 by jmc, Thu Feb 2 19:22:02 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      - seaice_solve4temp.F (keeping results unchanged):
9        * add 2 future run-time params to select which saturation vapor pressure
10          formula is used and how post-iteration fluxes are set.
11          Temporary set these 2 params according to option SOLVE4TEMP_LEGACY;
12        * New piece of code (not used) to update surf. atmos. heat flux F_ia using
13          the linearized expression to stay consistent with tsurf finding.
14      - seaice_freedrift.F avoid floating exception in sqrt(y) since y=sqrt(x*x)-x
15        can be < 0.
16    o pkg/seaice/seaice_solve4temp.F (SOLVE4TEMP_LEGACY undef):
17      - remove from F_ia (and from it's derivative dFiDTs1) the contribution of
18        conductive heat flux F_c , and add it explicitly when updating tsurf as
19        solution of: Fc = Fia + d/dT(Fia - Fc) *delta.tsurf
20        so that now F_ia has a consistent meaning through the entire routine.
21        This causes differences at truncation level: update output of fwd exp.
22        global_ocean.cs32x15.seaice.
23    o pkg/seaice:
24      - lots of editing/cleaning in seaice_solve4temp.F + better documentation
25        of arrays, sign/direction of fluxes; no effect on results.
26      - replace hard coded 273.16 (=previous value of celsius2K) by celsius2K
27        in seaice_budget_ocean.F & seaice_solve4temp.F (SOLVE4TEMP_LEGACY part);
28        note: this should have been done before changing celsius2K default.
29      - to keep results unchanged, add back old value of celsius2K in verification
30        exp. input*/data : lab_sea (AD), offline_exf_seaice (fwd+AD) & seaice_obcs
31      - replace hard coded seawater freezing temp in seaice_solve4temp.F (part
32        SOLVE4TEMP_LEGACY) of 271.20 (=previous value of celsius2K + default
33        value of SEAICE_freeze) by celsius2K+SEAICE_freeze so that seawater
34        freezing temp is consistent with value in seaice_growth.F ; this causes
35        differences at machine truncation level: update lab_sea AD output (3/4).
36    o pkg/seaice:
37      - mask (in exf_init_fixed.F) atemp,aqh,evap,precip,runoff,lwflx,areamask
38        and climsst/sss even when using seaice (to prevent calculation that might
39        use SST on land); does not affect any verification exp.
40      - apply mask to taux,tauy (in seaice_get_dynforcing.F); update output
41        of lab_sea.fd & lab_sea.hb87 and global_ocean.cs32x15.seaice_dynmix.
42    o pkg/seaice/seaice_growth.F: add mask to avoid non-zero ice thickness
43      over land (non-legacy code)
44    o vectorize salt_plume package:
45      - add extra code to salt_plume_frac and salt_plume_tendency_apply_s
46      - this code computes plumebk everywhere (also over land), thus requires
47        code to avoid divisions by zero and catch the case of kLev=Nr.
48      - efficiency of salt_plume_frac is still sub-optimal
49    o tools (genmake2):
50      - fix makefile NAME specification (option: -makefile NAME) by adding
51        "-f $MAKEFILE" in few places where it was missing including makedepend
52        command (contribution from Paul).
53    
54    checkpoint63i (2012/01/24)
55    o model/src:
56      - add factorized versions of some EOS code to find_rho.F,
57        define USE_FACTORIZED_EOS to turn it on (default for TARGET_NEC_SX)
58    o model/src:
59      - add celsius2K to namelist PARM01; remove unused recip_rhoNil from PARAMS.h;
60      - change default celsius2K from 273.16 to 273.15
61      - to keep results unchanged, add back old value of celsius2K in verification
62        exp. input*/data : aim.5l_cs, 1D_ocean_ice_column, lab_sea (fwd),
63         global_ocean.cs32x15(seaice) & cpl_aim+ocn(input_atm).
64    o model/src: add a little initialisation trick to find_rho.F and find_alpha.F
65      to make TAF generate vectorizable code
66    o pkg/seaice/seaice_evp.F: add code (copied from CICE) that avoids underflows.
67       Turn on by defining SEAICE_EVP_ELIMINATE_UNDERFLOWS. Most compilers
68       have flags that do this more efficiently.
69    o pkg/diagnostics/diagstats_calc.F
70      - for TARGET_NEC_SX fix the treatment of the scaling factor tmpFac=scaleFact
71    o pkg/obcs (with exch2):
72      - derive OB indices in overlap region from OB-InsideMask (in obcs_init_fixed.F)
73        and remove code (in obcs_readparms.F) which was based on EXCH of indices
74        (through buffer) and did not account for exch2 (e.g., CS-grid) topology.
75  o pkg/exf and seaice exp:  o pkg/exf and seaice exp:
76    - 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)
77      so that switching off area & heff advection flags does not affect results.      so that switching off area & heff advection flags does not affect results.
78    - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h    - change default EXF_LWDOWN_WITH_EMISSIVITY to #define in EXF_OPTIONS.h
79    - keep seaice_obcs unchanged (using #undef EXF_LWDOWN_WITH_EMISSIVITY)    - keep exp. seaice_obcs & 1D_ocean_ice_column(ad) unchanged (using #undef
80      and, using pkg/exf default emissivities, update results of fwd verification      EXF_LWDOWN_WITH_EMISSIVITY) and, using pkg/exf default emissivities, update
81      experiments: 1D_ocean_ice_column, global_ocean.cs32x15.seaice, lab_sea (x4)      results of verification experiments: 1D_ocean_ice_column(fwd),
82      and offline_exf_seaice (x3).      global_ocean.cs32x15.seaice(fwd+ad) & seaice_dynmix(ad), lab_sea (all 8)
83        and offline_exf_seaice (all 4).
84  o pkg/seaice:  o pkg/seaice:
85    - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;    - remove array YNEG, RIVER, TMIX (replaced by local var) from common block;
86      remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.      remove also areaNm1 & hEffNm1 when SEAICE_GROWTH_LEGACY is undef.
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