/[MITgcm]/MITgcm/verification/global_with_exf/README
ViewVC logotype

Contents of /MITgcm/verification/global_with_exf/README

Parent Directory Parent Directory | Revision Log Revision Log | View Revision Graph Revision Graph


Revision 1.3 - (show annotations) (download)
Thu Aug 7 02:31:29 2003 UTC (18 years ago) by dimitri
Branch: MAIN
CVS Tags: checkpoint51f_pre
Changes since 1.2: +32 -0 lines
o Added on-the-fly spatial interpolation capability
    "USE_EXF_INTERPOLATION" to pkg/exf.
  - This is a temporary Cartesian-grid hack until
    the super-duper ESMF coupler becomes available.
  - See verification/global_with_exf/README for usage example.
  - Removed obsolete EXFwindOnBgrid and SEAICEwindOnCgrid
    flags and modified pkg/seaice accordingly.
o Bug fix to pkg/ptracers, pkg/generic_advdiff/gad_calc_rhs.F,
    and pkg/kpp/kpp_transport_ptr.F for dealing with tracer
    non-local transport term.

1 heimbach@mit.edu 07-Nov-2002.
2 This verification experiment is almost identical to the
3 global_ocean.90x40x15 experiment, except that it uses
4 the exf (and cal) package instead of the
5 external_fields_load routine.
6 To obtain identical results between the two experiments,
7 the following 2 modifications are necessary:
8 1. in external_fields_load.F:
9 replace the line
10 Imytm=int(myTime*rdt+0.5)
11 by
12 Imytm=int((myTime+1296000.)*rdt+0.5)
13 2. in exf_set_climsst.F:
14 comment the 'quality' check, i.e. avoid the setting
15 to freezing temperature if less than climtempfreeze.
16
17 ================================
18
19 menemenlis@jpl.nasa.gov 05-Aug-2003
20
21 On-the-fly spatial interpolation has been added to pkg/exf.
22 It is enabled by defining CPP option USE_EXF_INTERPOLATION
23 in EXF_CPPOPTIONS.h or in ECCO_CPPOPTIONS.h
24 Both bi-linear and bi-cubic (#define BICUBIC) are supported.
25
26 This package is a placeholder until more general coupler
27 is made available by ESMF project. It assumes that input
28 grid is Cartesian with arbitrary latitude increments in the
29 y-direction but with equidistant longitude increments in
30 the x-direction. The input grid must encompass the complete
31 output grid in the y-direction (i.e., extrapolation is not
32 supported) and it is assumed that the grid is periodic in
33 the x-direction.
34
35 The verification/global_with_exf experiment has been modified
36 to use the USE_EXF_INTERPOLATION option, the input grids
37 being defined by variables *_lon0, *_lon_inc, *_lat0, *_lat_inc
38 *_nlon and *_nlat in input/dat.exf and input/data.exf_clim
39
40 *_lon0, *_lat0 :: lon and lat of sw corner of global input grid
41 *_lon_inc :: scalar x-grid increment
42 *_lat_inc :: vector y-grid increments
43 *_nlon and *_nlat :: input x-grid and y-grid size
44
45 In this particular example the input and output grids are
46 the same, so the results of the verification experiment remained
47 unchanged from before.

  ViewVC Help
Powered by ViewVC 1.1.22