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revision 1.1309 by jmc, Tue Oct 12 13:50:14 2010 UTC revision 1.1322 by dfer, Wed Oct 27 13:48:34 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 aim (2010/10/26):
8      - Introduce ALLOW_INSOLATION, moving toward a more general incoming solar radiation
9        formulation with obliquity, eccentricity, ... as run-time parameters,
10      - Introduce diagnostics for top-of-the-atmaophere incoming solar radiation and
11        upward shortwave radition at the surface (all-sky and clear-sky).
12    
13    o pkg/obcs:
14      - writing sections with globalFiles=T does not work: switch to tiled-files
15        when writing sections for OBCS (change pkg/rw/write_rec.F accordingly).
16      - fix index bug (OB_Ie -> OB_Iw_) in obcs_apply_uvice.F
17      - apply OBCS_SEAICE_COMPUTE_UVICE to both uice and vice at all obcs
18    
19    checkpoint62m (2010/10/21)
20    o pkg/seaice: vectorize seaice_solve4temp.F
21      - move iterations loops outside of i/j-loops
22      - requires 2D arrays for TB and effConduct
23      - add 2D iceOrNot to replace HICE_ACTUAL.GT.0, as HICE_ACTUAL is
24        modified in this routine
25      - a little bit of clean up, adjusting indentation, etc.
26      - replaced a few TEN**a by exp(a*log(10.)) in new code for better
27        performance and '**TWO' by '**2' (because TWO is a float),
28        replaced ONE, ZERO
29    o eesupp/src:
30       fix flow dir for exch1_z_RX_cube, exch1_uv_RX_cube & exch1_bg_RX_cube
31    o pkg/seaice/seaice_growth.F
32      Revision 1.89 of seaice_growth.F completes the overall october 2010 revision and
33      merging process. The merged routine has two branches, and one activates the 'evolution'
34      branch by setting SEAICE_GROWTH_LEGACY to undef (at the top of the routine for now).
35      In summary, here is what the '10/10 revision' did consist of
36        part 1: seaice_growth.F revisions 1.71 to 1.75
37          - Preliminary seaice_growth.F clean-up, keeping test results strictly unchanged.
38            The emphasis here was on improving readability (e.g. by trying to use meaningful
39            variable names) and modularity (e.g. by adding arrays to store heff etc. updates).
40        part 1.5:
41          - revising the lab_sea experiment to make it a more useful (i.e. stable
42            and representative of an actual model run). This was done by generating a
43            (winter) pickup to start from, switching back the main experiment dynamic
44            solver from evp to lsr, having one of the experiments use the free drift solution.
45        part 2: seaice_growth.F revisions 1.76 to 1.85
46          - Sorting out hard-coded constants that prevented heat and fresh water conservation.
47          - Sorting out the various fields units and sign (set early on and reset at the end)
48            to avoid numerous scalings/re-scalings. By v1.85 the basic unit for ice, heat and
49            fresh water stock is 'effective ice meters', and >0 implies more ice/snow.
50          - Using tendency terms arrays (d_HEFF* etc.) to alleviate remaining code locks,
51            and simplifying logical expressions to further improve readibility.
52        part 3: seaice_growth.F revisions 1.86 to 1.89
53          - Re-organize the blocks of code more logically.
54          - Merging the '_if.F' pieces that add something new.
55  o pkg/thsice:  o pkg/thsice:
56     re-arrange calculation in THSICE_SOLVE4TEMP: move outside of i,j loops    - vectorize thsice_solve4temp and thsice_get_exf.
57        Problem: thsice_solve4temp has an unvectorizable statement that
58        might also be problematic for TAF
59      - thsice_get_exf: add the ALLOW_BULK_LARGEYEAGER04 CPP-flag. This
60        does not change the verifcation experiment, but will change all
61        experiments that have this flag undefined (not tested in verification);
62        a little reorganization to save a few 2D fields and recomputations
63      - 1st step of revisiting thsice adjoint (major recomp. sorted out)
64      - 2nd step:  fix some store dirs
65        o seems to work somewhat, i.e. using ifort but not g77
66        o likely cause are incomplete init. or recomputation
67        o start verification/global_ocean.cs32x15/input_ad.thsice
68    o pkg/obcs: add support for exch2
69      - the position of the boundary and prescribed values are specified using
70        a global domain with exch2 facets stacked
71        - in x for N,S boundaries (like W2_mapIO=-1)
72        - in y for E,W boundaries (so E,W boundaries do not overlap)
73    o pkg/mdsio: add support for writing global sections with exch2
74        file layout is as for obcs described above:
75        - for x-z sections, facets are stacked in x (like W2_mapIO=-1)
76        - for y-z sections, facets are stacked in y
77    o pkg/thsice:
78       - change a few routines for better vectorization: thsice_albedo.F,
79         thsice_step_temp.F, and in thsice_calc_thickn.F. Results are
80         not affected, but in particular the latter routine has changed
81         dramatically (not necessarily easier to read now).
82       - re-arrange calculation in THSICE_SOLVE4TEMP: move outside of i,j loops
83     iteration loop and call to S/R THSICE_GET_BULKF & THSICE_GET_EXF.     iteration loop and call to S/R THSICE_GET_BULKF & THSICE_GET_EXF.
84  o verification/lab_sea:  o verification/lab_sea:
85    - overhaul of the forward model experiments. The main motivation    - overhaul of the forward model experiments. The main motivation
86      for this revision is that lab_sea has proven quite fragile (when      for this revision is that lab_sea has proven quite fragile (when
87      changing the sea-ice code, and switching platforms) to a point      changing the sea-ice code, and switching platforms) to a point
88      when failures were very hard to attribute to specific code problems.      when failures were very hard to attribute to specific code problems.
89    - the suspected reason for this fragility is noise amplification by evp so,    - the suspected reason for this fragility is noise amplification by evp so,
90      to start with, we decided to replace evp with lsr in the main experiment.      to start with, we decided to replace evp with lsr in the main experiment.
91    - the input.lsr experiment thus became obsolete and was removed.    - the input.lsr experiment thus became obsolete and was removed.
92    - it was replaced with the input.fd experiment that uses an    - it was replaced with the input.fd experiment that uses an
93      analytical "free drift" solution as the ice velocity field.      analytical "free drift" solution as the ice velocity field.
94    - Taken together, input (lsr), input.fd (free drift) and input.hb87 (evp)    - Taken together, input (lsr), input.fd (free drift) and input.hb87 (evp)
95      will hopefully allow us to discriminate problems due to dynamic solvers      will hopefully allow us to discriminate problems due to dynamic solvers
96      from problems due to the thermodynamic code. input.salt_plume (lsr) allows      from problems due to the thermodynamic code. input.salt_plume (lsr) allows
97      us to test additional options, along with the salt plume package.      us to test additional options, along with the salt plume package.
98    - Finally a pickup was generated (at the end of a one year run) to    - Finally a pickup was generated (at the end of a one year run) to
99      make the tests more representative of an actual model run. Previously      make the tests more representative of an actual model run. Previously
100      the tests starting point was a 1m thickness of ice everywhere.      the tests starting point was a 1m thickness of ice everywhere.
101  o pkg/seaice:  o pkg/seaice:
102    - introducing S\R seaice_freedrift.F that compute the    - introducing S\R seaice_freedrift.F that compute the
103      analytical solution to an approximate ice momentum      analytical solution to an approximate ice momentum
104      equation (i.e. the simple stress/coriolis balance).      equation (i.e. the simple stress/coriolis balance).
105    - define SEAICE_ALLOW_FREEDRIFT to trigger the computation    - define SEAICE_ALLOW_FREEDRIFT to trigger the computation
106      of the free drift velocity field, and enable its use.      of the free drift velocity field, and enable its use.
107      To actually use the free drift solution as the model ice      To actually use the free drift solution as the model ice
108      velocity field set SEAICEuseFREEDRIFT to .TRUE. in data.seaice.      velocity field set SEAICEuseFREEDRIFT to .TRUE. in data.seaice.
109  o move "useOASIS" from PARAMS.h to EEPARAMS.h and read it from "eedata"  o move "useOASIS" from PARAMS.h to EEPARAMS.h and read it from "eedata"
110    
111  checkpoint62l (2010/10/04)  checkpoint62l (2010/10/04)
# Line 352  o tools/build_options: Line 426  o tools/build_options:
426      but keep the former optfile for few weeks for smooth transition      but keep the former optfile for few weeks for smooth transition
427  o pkg/ecco  o pkg/ecco
428    - allow user defined cost function contributions    - allow user defined cost function contributions
429          CPP: ALLOW_USERCOST_CONTRIBUTION       CPP: ALLOW_USERCOST_CONTRIBUTION
430          USAGE: compute contributions in cost_usercost_all.F       USAGE: compute contributions in cost_usercost_all.F
431    - note: this is identical to what ALLOW_GENCOST_CONTRIBUTION once was.    - note: this is identical to what ALLOW_GENCOST_CONTRIBUTION once was.
432        the two options are complementary.        the two options are complementary.
433  o pkg/smooth  o pkg/smooth
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