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revision 1.1826 by jmc, Sun Feb 17 04:38:29 2013 UTC revision 1.1842 by jahn, Mon Mar 25 16:30:52 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 verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
8      - add OpenAD setup to this exp and make ptracers package work with OpenAD
9    o pkg/seaice/seaice_evp.F: mask the asymmetric contribution of the ice-ocean
10      stress (when the turningAngle is non-zero) over open water to avoid
11      stripes in the EVP-solutions after many EVP-substeps. This does not change
12      the verification experiment (because turningAngle=0 in that experiment), but
13      will affect other EVP solutions with turningAngle.ne.0
14    o verification, AD & TLM output:
15      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
16        additions and multiplications which affect results at machine truncation
17        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
18        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
19        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
20        digits of matching.
21    o pkg/seaice:
22       modify lsr-algorithm so that it vectorizes AND converges by using a
23       "zebra" method: split vector loop into two with step size 2; this
24       solves a general convergence problem for the JFNK solver on a vector
25       computer. It has the potential to even improve convergence for
26       non-vector machines, but it does change the results so it is turned
27       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
28       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
29    
30    checkpoint64e (2013/03/05)
31    o pkg/ecco and several verification experiments:
32       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
33       from ecco package, and revert to unified routine in model/src/
34       Adjust verification experiments accordingly, especially gloal_oce_llc90
35       Should conclude long-standing work by Gael to reconsile the_main_loop with
36       ECCO and will enable OpenAD's revolve loop in ECCO setup.
37    o pkg/generic_advdiff:
38      - implement compressible flow method for multi-dim advection (similar to
39        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
40        TAF generates many recomputations) to use it; no yet coded with implicit
41        vertical advection.
42      - change experiment advect_cs (new output) and advect_xy (same output)
43        to test compressible flow multi-dim advection.
44    o pkg/generic_advdiff:
45      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
46        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
47    o pkg/seaice:
48      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
49        bug affects two verification experiments (lab_sea and lab_sea.hb87),
50        recover old (wrong) results by setting noSlipFac = 2. in
51        seaice_calc_strainrates.F;
52      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
53      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
54        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
55      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
56    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
57      - new subroutines seaice_lsr_tridiagu/v
58      - introduce loop bounds i/jmin/max to be able to use a restricted
59        additive Schwarz method, but not used for now.
60      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
61      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
62    o OpenAD support
63       Reorganize S/R call for overall time-stepping loop to facilitate
64       OpenAD revolve loop replacement
65       (new S/R main_do_loop.F)
66    o model/src:
67      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
68      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
69        ADAMS_BASHFORTH2.
70    o pkg/cheapaml:
71      - add new parameter (default=F, same as before) to disable full domain
72        (including land) periodicity in X & Y dir.
73      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
74        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
75        into single S/R CHEAPAML_TIMESTEP.
76    
77    checkpoint64d (2013/02/17)
78  o pkg/monitor (angular momentum):  o pkg/monitor (angular momentum):
79    - do not add Eta contribution to the total AM if using rigid-lid;    - do not add Eta contribution to the total AM if using rigid-lid;
80    - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).    - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).

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