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revision 1.1780 by mlosch, Wed Dec 12 22:45:01 2012 UTC revision 1.1807 by mlosch, Wed Jan 16 21:20:56 2013 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: add a line search option to the JFNK solver
8    o pkg/mdsio:
9      - write missing value (corresponding to undefined array value) to meta files;
10        skip this if missing value is one (UNSET_RL would be a better value for the
11        case of undefined missing value but it's current the default missing-value);
12        Also update mdsio_read_meta.F (reading timeInterval & missing-value).
13    o pkg/exf & thsice:
14      - for diagnostics purpose, fill-up and update Qsw array (+ fill the diagnostics)
15        even when SHORTWAVE_HEATING is #undef;
16    o verification/cfc_example:
17      - turn on pkg/layers with pkg/diagnostics (to test pkg/layers and to illustrate
18        how to use it).
19    o verification/offline_exf_seaice:
20      in input: add SEAICErestoreUnderIce=.TRUE., and reduce size of forcing
21        files to only one time-record.
22      in input.thermo: narrow the 2 bands of low initial ice-concentration near
23        N & S edges; switch on SEAICErestoreUnderIce=T; use pkg/diagnostics for
24        snapshot output; same mcPheePiston value as in thsice with surf-current=0.2m/s.
25      in input.thsice: similar set-up as in input.thermo (channel with same seaice
26        initial conditions).
27    o verification/cfc_example:
28      - update file "data" with more standard choice (default rotationPeriod,
29        exactConserv=T, reduce ivdc_kappa to 10, remove multiDimAdvection=F,
30        set deltaTFreeSurf to deltaTtracer) and update the output.
31    o pkg/layers:
32      - fix bolus part so that it compiles with #undef GM_BOLUS_ADVEC;
33      - ensure that "layers_bolus" is switched to False when useGMRedi=False.
34    o verification/offline_exf_seaice:
35      - set all {field}period to zero for constant-in-time forcing (not tested
36        anywhere else).
37    o verification/offline_exf_seaice:
38      - dyn_lsr  : use pkg/seaice S/R (instead of pkg/thsice) to advect sea-ice;
39      - dyn_jfnk : use pkg/thsice S/R (instead of pkg/seaice) to advect sea-ice.
40    o model/src:
41      - implement Finite-Volume method for (hydrostatic) presure gradient
42        from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.
43    o pkg/seaice: implement EVP* by Lemieux et al. (2012).
44      - In order to be compatible with the default EVP code, this requires changing
45        the EVP code around a little; and because any small change immediately
46        breaks the lab_sea.hb87 verification experiment, the reference output is
47        updated two times (each time the remaining aggrement was only 2 digits):
48        - after replacing 1/dt by 1*recip_dt with a precomputed recip_dt
49        - after replacing 1/(1+0.5*dt/tau) by a/(a+1), with a=2*tau/dt
50        The adjoint test lab_sea.evp also needed to be updated.
51      - Turn on EVP* by setting SEAICE_deltaTevp as before, and setting
52        SEAICEuseEVPstar=.true.; for EVP* SEAICE_deltaTevp does not need to be
53        a factor of SEAICE_deltaTdyn, and you can set the number of EVP steps
54        explicitly with SEAICEnEVPstarSteps (thereby overriding the default of
55        INT(SEAICE_deltaTdyn/SEAICE_deltaTevp)). Controlling EVP* is deliberately
56        kept obscure, because I need to test it a little more.
57    o pkg/cheapaml:
58      - fix few incorrect type (_RL/_RS) in subroutine calls.
59    o pkg/seaice:
60      - new S/R SEAICE_MAP_RS2VEC (similar to SEAICE_MAP2VEC) to map _RS arrays
61        to _RL vector; this fixes JFNK code when compiling with "-use_r4" option.
62    o model/src:
63      - add a warning if using select_rStar=2 with nonlinFreeSurf <> 4;
64        change (in input_ad*/data) select_rStar from 2 to 1 for AD verification
65        experiments global_ocean.cs32x15 & tutorial_tracer_adjsens (+ update output)
66    o pkg/cheapaml:
67      - replace "273.1 _d 0" by celsius2K in pkg/cheapaml/cheapaml.F and
68        update output of experiment cheapAML_box.
69      - store in CHEAPAML.h coeffs ssq[0:2] for saturation specific humidity,
70        and set them only in one place (cheapaml_readparms.F).
71      - replace "273.16 _d 0" by celsius2K & replace "3.14159 _d 0" by constant "PI"
72      - remove re-setting of main-model parameter "celsius2K" (in cheapaml_readparms)
73        and re-setting of cheapAML params "lath" & "p0" (in cheapaml_init_varia).
74    o model/src/the_main_loop.F:
75      - fix revision 129 : need both ALLOW_ECCO and ALLOW_ECCO_EVOLUTION.
76    o pkg/seaice:
77      - remove legacy branch code.
78      - retire SEAICE_GROWTH_LEGACY and SEAICE_CAP_HEFF accordingly.
79    o verification/*/code*/SEAICE_OPTIONS.h:
80      - remove documentation for retired CPP flags (SEAICE_GROWTH_LEGACY,
81        SEAICE_CAP_HEFF).
82    o pkg/cheapaml:
83      - use standard routine (S/R GET_PERIODIC_INTERVAL) to decide when it is time
84        to load new forcing fields.
85      - add missing "_d 0" where it's needed; + some editing (improve indentation).
86      - remove switch to "-r8" compiler option (no longer needed) in verification
87        cheapAML_box, keep same output (small trucation error differences).
88    o verification/offline_exf_seaice:
89      - add thermodynamics only test.
90    o verification/cheapAML_box:
91      - split the domain in 8 (2x4) tiles; add MPI and multi-threaded test;
92        keep same output (same 14 digits for cg2d).
93      - switch on "-r8" compiler option (some numerical values are missing
94        the "_d 0") and update output (only 6 digits for cg2d were preserved).
95    
96    checkpoint64b (2012/12/24)
97    o pkg/cheapaml:
98      - remove un-used variables (Qnet,EmPmR) from pickup files.
99      - store tendency of advected variables into cheapaml pickup file
100        and fix the AB-2 restart.
101    o verification/offline_exf_seaice and lab_sea adjoint:
102      - switch to new code (#undef SEAICE_GROWTH_LEGACY).
103      - switch to 4 time steps in offline, consistent with lab_sea.
104      - match parameters from SEAICE_GROWTH_LEGACY branch in data.seaice.
105      - update results after change of experiment seaice.
106    o pkg/seaice:
107      - remove option SEAICE_MULTICATEGORY; has been replaced with run-time
108        parameter SEAICE_multDim. Issue a warning if SEAICE_MULTICATEGORY is
109        still defined since SEAICE_multDim needs to be set to MULTDIM value (from
110        SEAICE_SIZE.h) to recover previous #define SEAICE_MULTICATEGORY default.
111    o model/src:
112      - add run-time parameter to select CG2D solver minimum-residual solution
113        (in case of a poor convergence).
114    o pkg/seaice/seaice_lsr.F
115      - move calculation of matrix coefficients into new
116        S/R SEAICE_CALC_LSR_COEFFS; for now this routine remains in the same
117        file; the main purpose of this change is to be able to reuse the code
118        in S/R SEAICE_PRECONDITIONER
119      - modify the computation of the residual so that the mass of sea-ice
120        is not used twice; this simplifies the calculations, but since
121        the residual is never used except when LSR_mixIniGuess.ge.4---and this is
122        not tested in testreport---this does not affect the testreport results.
123    o verification/seaice_obcs:
124      - disable SEAICE_GROWTH_LEGACY; reset input files to match those of
125        verification/lab_sea/input.salt_plume; changes results/output.txt*
126    o model/src:
127      - adapt quasi-hydrostatic formulation to work with p or p* coordinate.
128    o pkg/seaice:
129      - improve description of parameters in seaice_fgmres.F and start
130        cleaning up the code
131      - change name of SCALPROD to SEAICE_SCALPROD and modify meaning of
132        second argument
133      - add a metric based on grid cell area to SEAICE_SCALPROD; update
134        results of offline_exf_seaice.dyn_jfnk
135      - compute initial residual norm in seaice_jfnk based on SEAICE_SCALPROD
136    o pkg/aim_v23:
137      - fix an other bug in dissipation heating (grid-cell area was missing).
138    o model/src + pkg/seaice:
139      - add global (multi-tile) linear solver for pair of tri-diagonal system
140        along X and Y lines, respectively for U and V component.
141        Note: 1) MPI and cube-exchange not yet coded.
142            2) probably not accurate for poorly conditioned / large size problem.
143      - add option for SEAICE_LSR to use global (multi-tile) tri-diagonal solver;
144        default: not compiled and not used.
145  o pkg/seaice:  o pkg/seaice:
146    - first attempt at a multi-threaded fgmres solver for the JFNK solver:    - first attempt at a multi-threaded fgmres solver for the JFNK solver:
147      introduce bi/bj loops and use global_sum_tile_rl instead of      introduce bi/bj loops and use global_sum_tile_rl instead of
148      mpi_allreduce in seaice_fgmres.F      mpi_allreduce in seaice_fgmres.F
149    - improve diagnostics output for fgmres solver (seaice_fgmres.F)    - improve diagnostics output for fgmres solver (seaice_fgmres.F)
150    - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)    - replace a few unnecessary goto statements by if-blocks  (seaice_fgmres.F)
151    - add a verification experiment for JFNK in offline_exf_seaice    - add a verification experiment for JFNK in offline_exf_seaice
152  o verification:  o verification:
153    - change (for now, only fwd test) offline_exf_seaice experiment:    - change (for now, only fwd test) offline_exf_seaice experiment:
154      use a re-entrant channel with idealized costline (trapezoidal shape)      use a re-entrant channel with idealized coastline (trapezoidal shape)
155      at southern boundary to explore seaice dynamics and thermodynamics      at southern boundary to explore seaice dynamics and thermodynamics
156      with simple forcing. Main set-up has dynamics+thermo and SST relaxation;      with simple forcing. Main set-up has dynamics+thermo and SST relaxation;
157      secondary test (input.thsice) use thermodynamics only with SST relaxation.      secondary test (input.thsice) use thermodynamics only with SST relaxation.
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