/[MITgcm]/MITgcm/verification/global_with_exf/README
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revision 1.3 by dimitri, Thu Aug 7 02:31:29 2003 UTC revision 1.4 by dimitri, Fri Aug 15 01:42:44 2003 UTC
# Line 1  Line 1 
1  heimbach@mit.edu 07-Nov-2002.   heimbach@mit.edu 07-Nov-2002.
2  This verification experiment is almost identical to the  This verification experiment is almost identical to the
3  global_ocean.90x40x15 experiment, except that it uses  global_ocean.90x40x15 experiment, except that it uses
4  the exf (and cal) package instead of the  the exf (and cal) package instead of the
# Line 18  the following 2 modifications are necess Line 18  the following 2 modifications are necess
18    
19  menemenlis@jpl.nasa.gov 05-Aug-2003  menemenlis@jpl.nasa.gov 05-Aug-2003
20    
21  On-the-fly spatial interpolation has been added to pkg/exf.  Input-field spatial interpolation has been added to pkg/exf.
22  It is enabled by defining CPP option USE_EXF_INTERPOLATION  It is enabled by defining CPP option USE_EXF_INTERPOLATION
23  in EXF_CPPOPTIONS.h or in ECCO_CPPOPTIONS.h  in EXF_CPPOPTIONS.h or in ECCO_CPPOPTIONS.h
24  Both bi-linear and bi-cubic (#define BICUBIC) are supported.  Both bi-linear and bi-cubic interpolation schemes are supported.
25    
26  This package is a placeholder until more general coupler  This package is a placeholder until a more general coupler
27  is made available by ESMF project.  It assumes that input  is made available by the ESMF project.  The output grid can be
28  grid is Cartesian with arbitrary latitude increments in the  arbitrary (cubed-sphere should be OK), but it is assumed that
29  y-direction but with equidistant longitude increments in  the input grid is Cartesian with arbitrary latitude increments
30    in the y-direction and with equidistant longitude increments in
31  the x-direction.  The input grid must encompass the complete  the x-direction.  The input grid must encompass the complete
32  output grid in the y-direction (i.e., extrapolation is not  output grid in the y-direction (i.e., extrapolation is not
33  supported) and it is assumed that the grid is periodic in  supported).  It is also assumed that the grid is periodic in
34  the x-direction.  the x-direction; to use the interpolation routine with a
35    non-periodic domain, make sure there is sufficient padding
36    at the edges, i.e., two points for bicubic and one for bilinear
37    interpolation.
38    
39  The verification/global_with_exf experiment has been modified  The verification/global_with_exf experiment has been modified
40  to use the USE_EXF_INTERPOLATION option, the input grids  to use the USE_EXF_INTERPOLATION option, the input grids
# Line 43  being defined by variables *_lon0, *_lon Line 47  being defined by variables *_lon0, *_lon
47     *_nlon and *_nlat :: input x-grid and y-grid size     *_nlon and *_nlat :: input x-grid and y-grid size
48    
49  In this particular example the input and output grids are  In this particular example the input and output grids are
50  the same, so the results of the verification experiment remained  the same, so the results of the verification experiment remain
51  unchanged from before.  unchanged from before.
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