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edhill |
1.1 |
function ncep2cubeWind |
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% Interpolates NCEP data onto cubed sphere |
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% for wind speed on tracer points. |
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% Edit this script with path of NCEP data. |
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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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% data path for grids |
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path='./'; |
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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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load TUV |
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flist={'ncep_uwind_monthly.cdf','ncep_vwind_monthly.cdf'}; |
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% load data |
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ncepPath=fullfile(archivedir,flist{1}); |
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ncload(ncepPath ); |
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ncepPath=fullfile(archivedir,flist{2}); |
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ncload(ncepPath ); |
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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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ys=Y; |
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U = permute(sq(u),[3 2 1]); |
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V = permute(sq(v),[3 2 1]); |
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Ushift(97:192,:,:)=U(1:96, :,:); |
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Ushift(1:96, :,:)=U(97:192, :,:); |
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Vshift(97:192,:,:)=V(1:96, :,:); |
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Vshift(1:96, :,:)=V(97:192, :,:); |
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%Wrap one bin around |
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Vshift(end+1, :,:) = Vshift(1,:,:); |
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Ushift(end+1, :,:) = Ushift(1,:,:); |
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xs(end+1)=(xs(end)-xs(end-1))+xs(end); |
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% month to plot for sanity check |
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imo=1; |
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figure(1) |
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imagesc(xs,ys,Ushift(:,:,imo)') |
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set(gca,'yDir','normal'); |
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colorbar('horiz') |
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title(['X Wind speed (m/s) at trancer points for month ',num2str(imo)]) |
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figure(2) |
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imagesc(xs,ys, Vshift(:,:,imo)') |
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set(gca,'yDir','normal'); |
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title(['Y Wind speed (m/s) at trancer points for month ',num2str(imo)]) |
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colorbar('horiz') |
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% interpolate winds on the tracer points |
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tx=redo(Ushift, xs,ys,yc,xc,msk); |
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ty=redo(Vshift, xs,ys,yc,xc,msk); |
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% Compute windspeed |
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for jj=1:12, |
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windSpeed(:,:,:,jj) = sqrt( tx(:,:,:,jj).^2 + ty(:,:,:,jj).^2); |
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end |
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% Rotate coordinates as necessary for each cubed-sphere tile |
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for jj=1:12, |
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Tx(:,:,:,jj)= TVv.*tx(:,:,:,jj)-TUv.*ty(:,:,:,jj); |
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Ty(:,:,:,jj)=-TVu.*tx(:,:,:,jj)+TUu.*ty(:,:,:,jj); |
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end |
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% Permute indcies for cubed sphere 32x32x6x12 becomes 32x6x32x12 |
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Ty=permute(Ty,[1 3 2 4 5]); |
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Tx=permute(Tx,[1 3 2 4 5]); |
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windSpeed=permute(windSpeed,[1 3 2 4 5]); |
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fout=['ncep_uwind_cubed.bin']; |
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wrda(fout,Ty,1,fmt,Ieee); |
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stats(Tx) |
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fout=['ncep_vwind_cubed.bin']; |
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wrda(fout,Ty,1,fmt,Ieee); |
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stats(Ty) |
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fout=['ncep_windspeed_cubed.bin']; |
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wrda(fout,windSpeed,1,fmt,Ieee); |
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stats(windSpeed) |
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figure(5) |
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displaytiles( tiles( sq( reshape( windSpeed(:,:,:,imo),[32*6 32]) ) ,1:6)) |
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title(['Wind sp (m/s), month ',num2str(imo)]) |
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title(['Wind speed (m/s) at trancer points for month ',num2str(imo)]) |
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figure(3) |
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displaytiles( tiles( sq( reshape( Tx(:,:,:,imo),[32*6 32]) ) ,1:6)) |
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title(['X Wind sp (m/s), month ',num2str(imo)]) |
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figure(4) |
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displaytiles( tiles( sq( reshape( Ty(:,:,:,imo),[32*6 32]) ) ,1:6)) |
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title(['Y Wind sp (m/s), month ',num2str(imo)]) |
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return |
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function Q=redo(Qshi, xs,ys,yc,xc,msk) |
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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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return |
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