/[MITgcm]/MITgcm/verification/global_with_exf/README
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Revision 1.5 - (show annotations) (download)
Mon Mar 10 01:35:16 2014 UTC (10 years ago) by jmc
Branch: MAIN
CVS Tags: checkpoint65z, checkpoint65x, checkpoint65y, checkpoint65r, checkpoint65s, checkpoint65p, checkpoint65q, checkpoint65v, checkpoint65w, checkpoint65t, checkpoint65u, checkpoint65j, checkpoint65k, checkpoint65h, checkpoint65i, checkpoint65n, checkpoint65l, checkpoint65m, checkpoint65b, checkpoint65c, checkpoint65a, checkpoint65f, checkpoint65g, checkpoint65d, checkpoint65e, checkpoint65, checkpoint66g, checkpoint66f, checkpoint66e, checkpoint66d, checkpoint66c, checkpoint66b, checkpoint66a, checkpoint66o, checkpoint66n, checkpoint66m, checkpoint66l, checkpoint66k, checkpoint66j, checkpoint66i, checkpoint66h, checkpoint65o, checkpoint64y, checkpoint64x, checkpoint64z, checkpoint64w, checkpoint64v, HEAD
Changes since 1.4: +2 -2 lines
update the intructions on how to run (in dir "run" instead of in "build"
 or "input" or elsewhere)

1 heimbach@mit.edu 07-Nov-2002.
2 This verification experiment is almost identical to the
3 tutorial_global_oce_latlon 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 Input-field 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 interpolation schemes are supported.
25
26 This package is a placeholder until a more general coupler
27 is made available by the ESMF project. The output grid can be
28 arbitrary (cubed-sphere should be OK), but it is assumed that
29 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
32 output grid in the y-direction (i.e., extrapolation is not
33 supported). It is also assumed that the grid is periodic in
34 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
40 to use the USE_EXF_INTERPOLATION option, the input grids
41 being defined by variables *_lon0, *_lon_inc, *_lat0, *_lat_inc
42 *_nlon and *_nlat in input/dat.exf and input/data.exf_clim
43
44 *_lon0, *_lat0 :: lon and lat of sw corner of global input grid
45 *_lon_inc :: scalar x-grid increment
46 *_lat_inc :: vector y-grid increments
47 *_nlon and *_nlat :: input x-grid and y-grid size
48
49 In this particular example the input and output grids are
50 the same, so the results of the verification experiment remain
51 unchanged from before.

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