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function ncep2cube |
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% Interpolates NCEP data onto cubed sphere |
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% Edit this script with path of NCEP data |
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|
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% Location of NCEP monthly climatology files |
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archivedir='/u/u2/cheisey/stephd/ncep'; |
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disp(['Reading NCEP data from ',archivedir]); |
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|
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% data path for grids |
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path='./'; |
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|
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|
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% Load grids |
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load FMT.mat |
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load HGRID.mat nxc nyc lon_lo lon_hi lat_lo lat_hi xc yc zA GRID yg |
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load MASKS |
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if ndims(msk)==4 |
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msk=msk(:,:,:,1); |
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else |
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msk=msk(:,:,1); |
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end |
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|
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% file list - ncep data |
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flist={'ncep_downsolar_monthly.cdf',... |
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'ncep_precip_monthly.cdf',... |
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'ncep_tair_monthly.cdf',... |
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'ncep_downlw_monthly.cdf',... |
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'ncep_qair_monthly.cdf',... |
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'ncep_runoff_monthly.cdf'}; |
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|
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% Label for plots |
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lbl={'solar - incoming solar radiation',... |
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'rain - precipitation',... |
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'tair - air temperature', ... |
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'flw - downward longwave flux',... |
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'qair - specific humidity',... |
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'runoff'}; |
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|
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% Name of corresponding variable in pkg/therm_seaice |
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nm={'solr', 'prate', 'temp', 'lwflx', 'qa','runoff'}; |
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|
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% Scale Factors |
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% Note reverse sign convention for some fields, see pkg/bulk_forcing/BULKF.h |
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scaleFac=[-1, -1.0E-3, 1., -1., 1.0, 1.0]; |
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|
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|
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% delete file for plots |
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delete ncep2cube.ps |
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|
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for ifile=1:length(flist) |
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if ifile > 1 |
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clear Qshift; |
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clear xs; |
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end |
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filename=flist{ifile}; |
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disp(filename); |
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ncepFile=fullfile(archivedir,filename); |
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ncload(ncepFile ); |
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|
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% Rotate data in x so that it goes from -180 to 180 |
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% instead of 0 to 360 |
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xs=X-X(97); |
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xs(end+1)=(xs(end)-xs(end-1))+xs(end); |
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|
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ys=Y; |
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Qshi = permute(sq(eval(nm{ifile})),[3 2 1]); |
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Qshift(97:192,:,:)=Qshi(1:96, :,:); |
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Qshift(1:96, :,:)=Qshi(97:192, :,:); |
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|
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|
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%Wrap one bin around |
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Qshift(end+1, :,:) = Qshift(1,:,:); |
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|
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|
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% Interpolate data |
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Q=redo(Qshift, xs,ys,yc,xc,msk); |
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Q=Q*scaleFac(ifile); |
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|
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% Permute indcies for cubed sphere 32x32x6 becomes 32x6x32 |
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Qpermute=permute(Q,[1 3 2 4 5]); |
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|
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% write output file |
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fout=[filename(1:end-12),'_cubed.bin']; |
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wrda(fout,Qpermute,1,fmt,Ieee); |
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|
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% display min and max |
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mx=max(max(max(max(Qpermute)))); |
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mn=min(min(min(min(Qpermute)))); |
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disp([' min = ',num2str(mn),' max = ',num2str(mx)]) |
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|
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% plot data |
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if 1==1 |
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|
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figure(ifile) |
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imonth = 3; |
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subplot(2,1,1) |
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|
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imagesc(xs,ys,sq(Qshift(:,:,imonth))'); |
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set(gca,'yDir','normal'); |
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title([strrep(filename,'_','\_'),' month=',num2str(imonth)]); |
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colorbar('horiz') |
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|
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xcs=rdmds(fullfile(path,'XC')); |
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ycs=rdmds(fullfile(path,'YC')); |
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xcg=rdmds(fullfile(path,'XG')); |
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ycg=rdmds(fullfile(path,'YG')); |
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ny=32; |
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for n=1:6, |
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v2d([(n-1)*ny+1:n*ny],[1:ny])=Q([1:ny],[1:ny],n, imonth); |
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end |
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|
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subplot(2,1,2) |
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shift=-1; |
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c1=0; |
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c2=0; |
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grph_CS(sq(v2d),xcs,ycs,xcg,ycg,c1,c2,shift) |
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h=title([strrep(fout,'_','\_'),' ',lbl{ifile}]); |
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print -dpsc2 -append ncep2cube.ps |
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end |
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|
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|
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end |
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return |
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|
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function Q=redo(Qshi, xs,ys,yc,xc,msk) |
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|
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|
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for jj=1:12, |
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for t=1:size(xc,3); |
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Q(:,:,t,jj)=interp2(ys,xs,sq(Qshi(:,:,jj)),yc(:,:,t),xc(:,:,t)) .*msk(:,:,t); |
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end |
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end |
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Q( isnan(Q) )=0; |
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|
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return |
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|
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|
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