/[MITgcm]/MITgcm/utils/matlab/uvcube2latlon.m
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Revision 1.3 - (hide annotations) (download)
Wed Aug 15 13:40:40 2001 UTC (22 years, 8 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint40pre8
Changes since 1.2: +3 -3 lines
fix bug: no reset of argument xc,yc

1 adcroft 1.2 function [U,V] = uvcube2latlon(LON,LAT,u,v,xc,yc)
2     % [ui,vi]=cube2latlon(x,y,u,v,xi,yi);
3     %
4     % Re-grids model output on expanded spherical cube to lat-lon grid.
5     % x,y are 2-D arrays of the cell-centered coordinates
6     % u,v is a 2-D or 3-D horizontal components of model flow fields.
7     % xi,yi are vectors of the new regular lat-lon grid to interpolate to.
8     % ui,vi are the flow fields with dimensions of size(xi) x size(yi) size(u,3).
9     %
10     % e.g.
11     % >> x=rdmds('XC');
12     % >> y=rdmds('YC');
13     % >> u=rdmds('uVeltave.0000513360');
14     % >> v=rdmds('vVeltave.0000513360');
15     % >> xi=-179:2:180;yi=-89:2:90;
16     % >> [ui,vi]=uvcube2latlon(x,y,u,v,xi,yi);
17     %
18 jmc 1.3 % $Header: /u/gcmpack/models/MITgcmUV/utils/matlab/uvcube2latlon.m,v 1.2 2001/05/29 14:01:41 adcroft Exp $
19 adcroft 1.2
20     [nnx ny nz]=size(u);
21    
22     U=reshape(u,[ny 6 ny nz]);
23     V=reshape(v,[ny 6 ny nz]);
24    
25     uu=zeros(ny+1,6,ny,nz);
26     vv=zeros(ny,6,ny+1,nz);
27    
28     for k=1:6;
29     uu(1:ny,k,:,:)=U(:,k,:,:);
30     vv(:,k,1:ny,:)=V(:,k,:,:);
31     end
32    
33     for k=1:nz;
34     uu(ny+1,1:2:6,:,k)=uu(1,2:2:6,:,k);
35     uu(ny+1,2:2:6,:,k)=vv(ny:-1:1,[4:2:6 2:2:3],1,k)';
36     vv(:,2:2:6,ny+1,k)=vv(:,[3:2:6 1],1,k);
37     vv(:,1:2:6,ny+1,k)=squeeze(uu(1,[3:2:6 1],ny:-1:1,k))';
38     end
39    
40     ub=(uu(1:ny,:,:,:)+uu(2:ny+1,:,:,:))/2;
41     vb=(vv(:,:,1:ny,:)+vv(:,:,2:ny+1,:))/2;
42    
43     load TUV
44    
45     clear U V
46     for kk=1:nz;
47     for k=1:6;
48     U(:,k,:,kk)=TUu(:,:,k).*squeeze(ub(:,k,:,kk))+TUv(:,:,k).*squeeze(vb(:,k,:,kk));
49     V(:,k,:,kk)=TVu(:,:,k).*squeeze(ub(:,k,:,kk))+TVv(:,:,k).*squeeze(vb(:,k,:,kk));
50     end
51     end
52    
53     U=reshape(U,[nnx ny nz]);
54     V=reshape(V,[nnx ny nz]);
55    
56 jmc 1.3 % xc=-179:2:179;
57     % yc=-89:2:89;
58 adcroft 1.2 U=cube2latlon(LON,LAT,U,xc,yc);
59     V=cube2latlon(LON,LAT,V,xc,yc);

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