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revision 1.1305 by jmc, Sun Sep 26 13:48:19 2010 UTC revision 1.1324 by jmc, Mon Nov 1 00:27:53 2010 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/generic_advdiff:
8      Change OBCS in multiDim advection (gad_advection.F):
9       Use maskInC to prevent intermediate update of tracer-field in OB regions,
10       thus keeping current-time-step OB values; and remove the call to OBCS_APPLY
11       which were applying future time-step OB values.
12      This way, all explicit calculations use current-time-step OB values
13       (simpler and more consistent).
14      Affects results when set-up uses time-varying OBC and multi-dim advection;
15       update output of experiment seaice_obcs.
16    o pkg/seaice:
17      move OPTIONS (formerly locally defined) to SEAICE_OPTIONS.h:
18       this includes SEAICE_GROWTH_LEGACY (+ SEAICE_DO_OPEN_WATER_GROWTH &
19         SEAICE_OCN_MELT_ACT_ON_AREA ) and SEAICE_SOLVE4TEMP_LEGACY.
20      Default (pkg/seaice/SEAICE_OPTIONS.h) is to define SEAICE_SOLVE4TEMP_LEGACY
21       but leave SEAICE_GROWTH_LEGACY undef ; For now, keep verification exp
22       unchanged (SEAICE_GROWTH_LEGACY defined in */code*/SEAICE_OPTIONS.h)
23    o pkg aim (2010/10/26):
24      - Introduce ALLOW_INSOLATION, moving toward a more general incoming solar radiation
25        formulation with obliquity, eccentricity, ... as run-time parameters,
26      - Introduce diagnostics for top-of-the-atmaophere incoming solar radiation and
27        upward shortwave radition at the surface (all-sky and clear-sky).
28    o pkg/obcs:
29      - writing sections with globalFiles=T does not work: switch to tiled-files
30        when writing sections for OBCS (change pkg/rw/write_rec.F accordingly).
31      - fix index bug (OB_Ie -> OB_Iw_) in obcs_apply_uvice.F
32      - apply OBCS_SEAICE_COMPUTE_UVICE to both uice and vice at all obcs
33    
34    checkpoint62m (2010/10/21)
35    o pkg/seaice: vectorize seaice_solve4temp.F
36      - move iterations loops outside of i/j-loops
37      - requires 2D arrays for TB and effConduct
38      - add 2D iceOrNot to replace HICE_ACTUAL.GT.0, as HICE_ACTUAL is
39        modified in this routine
40      - a little bit of clean up, adjusting indentation, etc.
41      - replaced a few TEN**a by exp(a*log(10.)) in new code for better
42        performance and '**TWO' by '**2' (because TWO is a float),
43        replaced ONE, ZERO
44    o eesupp/src:
45       fix flow dir for exch1_z_RX_cube, exch1_uv_RX_cube & exch1_bg_RX_cube
46    o pkg/seaice/seaice_growth.F
47      Revision 1.89 of seaice_growth.F completes the overall october 2010 revision and
48      merging process. The merged routine has two branches, and one activates the 'evolution'
49      branch by setting SEAICE_GROWTH_LEGACY to undef (at the top of the routine for now).
50      In summary, here is what the '10/10 revision' did consist of
51        part 1: seaice_growth.F revisions 1.71 to 1.75
52          - Preliminary seaice_growth.F clean-up, keeping test results strictly unchanged.
53            The emphasis here was on improving readability (e.g. by trying to use meaningful
54            variable names) and modularity (e.g. by adding arrays to store heff etc. updates).
55        part 1.5:
56          - revising the lab_sea experiment to make it a more useful (i.e. stable
57            and representative of an actual model run). This was done by generating a
58            (winter) pickup to start from, switching back the main experiment dynamic
59            solver from evp to lsr, having one of the experiments use the free drift solution.
60        part 2: seaice_growth.F revisions 1.76 to 1.85
61          - Sorting out hard-coded constants that prevented heat and fresh water conservation.
62          - Sorting out the various fields units and sign (set early on and reset at the end)
63            to avoid numerous scalings/re-scalings. By v1.85 the basic unit for ice, heat and
64            fresh water stock is 'effective ice meters', and >0 implies more ice/snow.
65          - Using tendency terms arrays (d_HEFF* etc.) to alleviate remaining code locks,
66            and simplifying logical expressions to further improve readibility.
67        part 3: seaice_growth.F revisions 1.86 to 1.89
68          - Re-organize the blocks of code more logically.
69          - Merging the '_if.F' pieces that add something new.
70    o pkg/thsice:
71      - vectorize thsice_solve4temp and thsice_get_exf.
72        Problem: thsice_solve4temp has an unvectorizable statement that
73        might also be problematic for TAF
74      - thsice_get_exf: add the ALLOW_BULK_LARGEYEAGER04 CPP-flag. This
75        does not change the verifcation experiment, but will change all
76        experiments that have this flag undefined (not tested in verification);
77        a little reorganization to save a few 2D fields and recomputations
78      - 1st step of revisiting thsice adjoint (major recomp. sorted out)
79      - 2nd step:  fix some store dirs
80        o seems to work somewhat, i.e. using ifort but not g77
81        o likely cause are incomplete init. or recomputation
82        o start verification/global_ocean.cs32x15/input_ad.thsice
83    o pkg/obcs: add support for exch2
84      - the position of the boundary and prescribed values are specified using
85        a global domain with exch2 facets stacked
86        - in x for N,S boundaries (like W2_mapIO=-1)
87        - in y for E,W boundaries (so E,W boundaries do not overlap)
88    o pkg/mdsio: add support for writing global sections with exch2
89        file layout is as for obcs described above:
90        - for x-z sections, facets are stacked in x (like W2_mapIO=-1)
91        - for y-z sections, facets are stacked in y
92    o pkg/thsice:
93       - change a few routines for better vectorization: thsice_albedo.F,
94         thsice_step_temp.F, and in thsice_calc_thickn.F. Results are
95         not affected, but in particular the latter routine has changed
96         dramatically (not necessarily easier to read now).
97       - re-arrange calculation in THSICE_SOLVE4TEMP: move outside of i,j loops
98       iteration loop and call to S/R THSICE_GET_BULKF & THSICE_GET_EXF.
99    o verification/lab_sea:
100      - overhaul of the forward model experiments. The main motivation
101        for this revision is that lab_sea has proven quite fragile (when
102        changing the sea-ice code, and switching platforms) to a point
103        when failures were very hard to attribute to specific code problems.
104      - the suspected reason for this fragility is noise amplification by evp so,
105        to start with, we decided to replace evp with lsr in the main experiment.
106      - the input.lsr experiment thus became obsolete and was removed.
107      - it was replaced with the input.fd experiment that uses an
108        analytical "free drift" solution as the ice velocity field.
109      - Taken together, input (lsr), input.fd (free drift) and input.hb87 (evp)
110        will hopefully allow us to discriminate problems due to dynamic solvers
111        from problems due to the thermodynamic code. input.salt_plume (lsr) allows
112        us to test additional options, along with the salt plume package.
113      - Finally a pickup was generated (at the end of a one year run) to
114        make the tests more representative of an actual model run. Previously
115        the tests starting point was a 1m thickness of ice everywhere.
116    o pkg/seaice:
117      - introducing S\R seaice_freedrift.F that compute the
118        analytical solution to an approximate ice momentum
119        equation (i.e. the simple stress/coriolis balance).
120      - define SEAICE_ALLOW_FREEDRIFT to trigger the computation
121        of the free drift velocity field, and enable its use.
122        To actually use the free drift solution as the model ice
123        velocity field set SEAICEuseFREEDRIFT to .TRUE. in data.seaice.
124    o move "useOASIS" from PARAMS.h to EEPARAMS.h and read it from "eedata"
125    
126    checkpoint62l (2010/10/04)
127  o pkg/seaice:  o pkg/seaice:
128    -fix the USE_ORIGINAL_SBI version (for variable freezing point);    -fix the USE_ORIGINAL_SBI version (for variable freezing point);
129    -use "celsius2K" in SEAICE_VARIABLE_FREEZING_POINT and in new    -use "celsius2K" in SEAICE_VARIABLE_FREEZING_POINT and in new
# Line 321  o tools/build_options: Line 441  o tools/build_options:
441      but keep the former optfile for few weeks for smooth transition      but keep the former optfile for few weeks for smooth transition
442  o pkg/ecco  o pkg/ecco
443    - allow user defined cost function contributions    - allow user defined cost function contributions
444          CPP: ALLOW_USERCOST_CONTRIBUTION       CPP: ALLOW_USERCOST_CONTRIBUTION
445          USAGE: compute contributions in cost_usercost_all.F       USAGE: compute contributions in cost_usercost_all.F
446    - note: this is identical to what ALLOW_GENCOST_CONTRIBUTION once was.    - note: this is identical to what ALLOW_GENCOST_CONTRIBUTION once was.
447        the two options are complementary.        the two options are complementary.
448  o pkg/smooth  o pkg/smooth
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