matlab_class/gcmfaces_calc/calc_MeridionalTransport.m

function [FLD]=calc_MeridinalTransport(fldU,fldV,LATS_MASKS,varargin);

global mygrid;

if nargin==4; doScaleWithArea=varargin{1}; else; doScaleWithArea=0; end;

%initialize output:
n3=max(size(fldU.f1,3),1); n4=max(size(fldV.f1,4),1);
FLD=NaN*squeeze(zeros(length(LATS_MASKS),n4));

%prepare fldU/fldV:
fldU(isnan(fldU))=0; fldV(isnan(fldV))=0;

if doScaleWithArea;
   dxg=mk3D(mygrid.DXG,fldU); dyg=mk3D(mygrid.DYG,fldU); drf=mk3D(mygrid.DRF,fldU);
   for k4=1:n4;
   fldU(:,:,:,k4)=fldU(:,:,:,k4).*dyg.*drf.*mygrid.hFacW;
   fldV(:,:,:,k4)=fldV(:,:,:,k4).*dxg.*drf.*mygrid.hFacS;
   end;
end;

%use array format to speed up computation below:
fldU=convert2array(fldU); fldV=convert2array(fldV);
n1=size(fldU,1); n2=size(fldU,2);
fldU=reshape(fldU,n1*n2,n3*n4); fldV=reshape(fldV,n1*n2,n3*n4); 

for iy=1:length(LATS_MASKS); 

   %get list ofpoints that form a zonal band:
   mmu=convert2array(LATS_MASKS(iy).mmu);
   nnu=find(~isnan(mmu)); mmu=mmu(nnu)*ones(1,n3*n4);
   mmv=convert2array(LATS_MASKS(iy).mmv);
   nnv=find(~isnan(mmv)); mmv=mmv(nnv)*ones(1,n3*n4);

   %do the area weighed average along this band:
   tmpu=sum(fldU(nnu,:).*mmu,1);
   tmpv=sum(fldV(nnv,:).*mmv,1);

   %store:
   FLD(iy,:)=reshape(sum(tmpu+tmpv,2),[1 n4]);

end; 


1	gforget	1.1	function [FLD]=calc_MeridinalTransport(fldU,fldV,LATS_MASKS,varargin);
2
3			global mygrid;
4
5			if nargin==4; doScaleWithArea=varargin{1}; else; doScaleWithArea=0; end;
6
7			%initialize output:
8			n3=max(size(fldU.f1,3),1); n4=max(size(fldV.f1,4),1);
9			FLD=NaN*squeeze(zeros(length(LATS_MASKS),n4));
10
11			%prepare fldU/fldV:
12			fldU(isnan(fldU))=0; fldV(isnan(fldV))=0;
13
14			if doScaleWithArea;
15			dxg=mk3D(mygrid.DXG,fldU); dyg=mk3D(mygrid.DYG,fldU); drf=mk3D(mygrid.DRF,fldU);
16			for k4=1:n4;
17			fldU(:,:,:,k4)=fldU(:,:,:,k4).dyg.drf.*mygrid.hFacW;
18			fldV(:,:,:,k4)=fldV(:,:,:,k4).dxg.drf.*mygrid.hFacS;
19			end;
20			end;
21
22			%use array format to speed up computation below:
23			fldU=convert2array(fldU); fldV=convert2array(fldV);
24			n1=size(fldU,1); n2=size(fldU,2);
25			fldU=reshape(fldU,n1n2,n3n4); fldV=reshape(fldV,n1n2,n3n4);
26
27			for iy=1:length(LATS_MASKS);
28
29			%get list ofpoints that form a zonal band:
30			mmu=convert2array(LATS_MASKS(iy).mmu);
31			nnu=find(~isnan(mmu)); mmu=mmu(nnu)ones(1,n3n4);
32			mmv=convert2array(LATS_MASKS(iy).mmv);
33			nnv=find(~isnan(mmv)); mmv=mmv(nnv)ones(1,n3n4);
34
35			%do the area weighed average along this band:
36			tmpu=sum(fldU(nnu,:).*mmu,1);
37			tmpv=sum(fldV(nnv,:).*mmv,1);
38
39			%store:
40			FLD(iy,:)=reshape(sum(tmpu+tmpv,2),[1 n4]);
41
42			end;
43
44