| 1 |
function ncep2cubeWind |
| 2 |
% Interpolates NCEP data onto cubed sphere |
| 3 |
% for wind speed on tracer points. |
| 4 |
% Edit this script with path of NCEP data. |
| 5 |
|
| 6 |
% Location of NCEP monthly climatology files |
| 7 |
archivedir='/u/u2/cheisey/stephd/ncep'; |
| 8 |
disp(['Reading NCEP data from ',archivedir]); |
| 9 |
|
| 10 |
% data path for grids |
| 11 |
path='./'; |
| 12 |
|
| 13 |
% Load grids |
| 14 |
load FMT.mat |
| 15 |
load HGRID.mat nxc nyc lon_lo lon_hi lat_lo lat_hi xc yc zA GRID yg |
| 16 |
load MASKS |
| 17 |
if ndims(msk)==4 |
| 18 |
msk=msk(:,:,:,1); |
| 19 |
else |
| 20 |
msk=msk(:,:,1); |
| 21 |
end |
| 22 |
|
| 23 |
load TUV |
| 24 |
|
| 25 |
|
| 26 |
flist={'ncep_uwind_monthly.cdf','ncep_vwind_monthly.cdf'}; |
| 27 |
|
| 28 |
|
| 29 |
|
| 30 |
% load data |
| 31 |
ncepPath=fullfile(archivedir,flist{1}); |
| 32 |
ncload(ncepPath ); |
| 33 |
ncepPath=fullfile(archivedir,flist{2}); |
| 34 |
ncload(ncepPath ); |
| 35 |
|
| 36 |
|
| 37 |
|
| 38 |
% Rotate data in x so that it goes from -180 to 180 |
| 39 |
% instead of 0 to 360 |
| 40 |
xs=X-X(97); |
| 41 |
ys=Y; |
| 42 |
U = permute(sq(u),[3 2 1]); |
| 43 |
V = permute(sq(v),[3 2 1]); |
| 44 |
Ushift(97:192,:,:)=U(1:96, :,:); |
| 45 |
Ushift(1:96, :,:)=U(97:192, :,:); |
| 46 |
Vshift(97:192,:,:)=V(1:96, :,:); |
| 47 |
Vshift(1:96, :,:)=V(97:192, :,:); |
| 48 |
|
| 49 |
|
| 50 |
%Wrap one bin around |
| 51 |
Vshift(end+1, :,:) = Vshift(1,:,:); |
| 52 |
Ushift(end+1, :,:) = Ushift(1,:,:); |
| 53 |
xs(end+1)=(xs(end)-xs(end-1))+xs(end); |
| 54 |
|
| 55 |
|
| 56 |
% month to plot for sanity check |
| 57 |
imo=1; |
| 58 |
|
| 59 |
figure(1) |
| 60 |
imagesc(xs,ys,Ushift(:,:,imo)') |
| 61 |
set(gca,'yDir','normal'); |
| 62 |
colorbar('horiz') |
| 63 |
title(['X Wind speed (m/s) at trancer points for month ',num2str(imo)]) |
| 64 |
figure(2) |
| 65 |
imagesc(xs,ys, Vshift(:,:,imo)') |
| 66 |
set(gca,'yDir','normal'); |
| 67 |
title(['Y Wind speed (m/s) at trancer points for month ',num2str(imo)]) |
| 68 |
colorbar('horiz') |
| 69 |
|
| 70 |
|
| 71 |
|
| 72 |
% interpolate winds on the tracer points |
| 73 |
tx=redo(Ushift, xs,ys,yc,xc,msk); |
| 74 |
ty=redo(Vshift, xs,ys,yc,xc,msk); |
| 75 |
|
| 76 |
% Compute windspeed |
| 77 |
for jj=1:12, |
| 78 |
windSpeed(:,:,:,jj) = sqrt( tx(:,:,:,jj).^2 + ty(:,:,:,jj).^2); |
| 79 |
end |
| 80 |
|
| 81 |
|
| 82 |
|
| 83 |
% Rotate coordinates as necessary for each cubed-sphere tile |
| 84 |
for jj=1:12, |
| 85 |
|
| 86 |
Tx(:,:,:,jj)= TVv.*tx(:,:,:,jj)-TUv.*ty(:,:,:,jj); |
| 87 |
Ty(:,:,:,jj)=-TVu.*tx(:,:,:,jj)+TUu.*ty(:,:,:,jj); |
| 88 |
|
| 89 |
end |
| 90 |
|
| 91 |
% Permute indcies for cubed sphere 32x32x6x12 becomes 32x6x32x12 |
| 92 |
Ty=permute(Ty,[1 3 2 4 5]); |
| 93 |
Tx=permute(Tx,[1 3 2 4 5]); |
| 94 |
windSpeed=permute(windSpeed,[1 3 2 4 5]); |
| 95 |
|
| 96 |
|
| 97 |
fout=['ncep_uwind_cubed.bin']; |
| 98 |
wrda(fout,Ty,1,fmt,Ieee); |
| 99 |
stats(Tx) |
| 100 |
|
| 101 |
fout=['ncep_vwind_cubed.bin']; |
| 102 |
wrda(fout,Ty,1,fmt,Ieee); |
| 103 |
stats(Ty) |
| 104 |
|
| 105 |
fout=['ncep_windspeed_cubed.bin']; |
| 106 |
wrda(fout,windSpeed,1,fmt,Ieee); |
| 107 |
stats(windSpeed) |
| 108 |
|
| 109 |
figure(5) |
| 110 |
displaytiles( tiles( sq( reshape( windSpeed(:,:,:,imo),[32*6 32]) ) ,1:6)) |
| 111 |
title(['Wind sp (m/s), month ',num2str(imo)]) |
| 112 |
title(['Wind speed (m/s) at trancer points for month ',num2str(imo)]) |
| 113 |
|
| 114 |
|
| 115 |
|
| 116 |
figure(3) |
| 117 |
displaytiles( tiles( sq( reshape( Tx(:,:,:,imo),[32*6 32]) ) ,1:6)) |
| 118 |
title(['X Wind sp (m/s), month ',num2str(imo)]) |
| 119 |
figure(4) |
| 120 |
displaytiles( tiles( sq( reshape( Ty(:,:,:,imo),[32*6 32]) ) ,1:6)) |
| 121 |
title(['Y Wind sp (m/s), month ',num2str(imo)]) |
| 122 |
return |
| 123 |
|
| 124 |
|
| 125 |
|
| 126 |
function Q=redo(Qshi, xs,ys,yc,xc,msk) |
| 127 |
|
| 128 |
|
| 129 |
for jj=1:12, |
| 130 |
for t=1:size(xc,3); |
| 131 |
Q(:,:,t,jj)=interp2(ys,xs,sq(Qshi(:,:,jj)),yc(:,:,t),xc(:,:,t)) .*msk(:,:,t); |
| 132 |
end |
| 133 |
end |
| 134 |
Q( isnan(Q) )=0; |
| 135 |
|
| 136 |
return |
| 137 |
|
| 138 |
|
| 139 |
|
Parent Directory
| 
Revision Log
| 
Revision Graph