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gmaze |
1.1 |
% |
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% V = volbet2iso(TRACER,LIMITS,DEPTH,LAT,LONG) |
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% |
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gmaze |
1.2 |
% This function computes the ocean volume between two iso surfaces, |
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gmaze |
1.1 |
% given fixed limits eastward, westward and southward. |
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% |
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% TRACER = TRACER(DEPTH,LAT,LONG) : surface tracer variable in 3D |
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% LIMITS = [OUTCROP1 OUTCROP2 MAX_DEPTH MAX_LAT1 MAX_LAT2 MAX_LONG1 MAX_LONG2] |
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% : limit's values (MAX_DEPTH and MAX_LAT2 are used only if |
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% the iso-outcrop's surfaces reach them). |
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% DEPTH : vertical axis (1D), m downward, positive |
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% LAT : latitude axis (1D), degrees northward |
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% LONG : longitude axis (1D), degrees east |
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% V : single volume value (m^3) |
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% |
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% 06/12/2006 |
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% gmaze@mit.edu |
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% |
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function varargout = volbet2iso(TRACER,LIMITS,DEPTH,LAT,LONG) |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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% PRE-PROCESS and ERROR CHECK % |
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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gmaze |
1.3 |
pv_checkpath |
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gmaze |
1.1 |
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% Check number of input: |
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if nargin ~= 5 |
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help volbet2iso.m |
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error('volbet2iso.m : Wrong number of parameters') |
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return |
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end %if |
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% Check dimensions: |
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n = size(TRACER); |
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if length(n)==3 |
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[nz ny nx] = size(TRACER); |
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if nz~=length(DEPTH) | ny~=length(LAT) | nx~=length(LONG) |
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help volbet2iso.m |
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error('volbet2iso.m : Axis must have same dimensions than TRACER field'); |
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return |
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end %if |
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else |
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help volbet2iso.m |
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error('volbet2iso.m : TRACER must be a 3D field') |
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return |
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end %if |
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% Ensure that axis are of dim: (1,N) and well sorted (increasing values): |
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a=size(DEPTH); |
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if a(1) ~= 1, DEPTH=DEPTH'; end |
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S = sort(DEPTH); |
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if S ~= DEPTH |
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help volbet2iso.m |
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error('volbet2iso.m : DEPTH must be increasing values') |
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return |
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end %if |
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a=size(LAT); |
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if a(1) ~= 1, LAT=LAT'; end |
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S = sort(LAT); |
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if S ~= LAT |
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help volbet2iso.m |
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error('volbet2iso.m : LAT must be increasing values') |
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return |
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end %if |
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a=size(LONG); |
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if a(1) ~= 1, LONG=LONG'; end |
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S = sort(LONG); |
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if S ~= LONG |
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help volbet2iso.m |
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error('volbet2iso.m : LONG must be increasing values') |
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return |
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end %if |
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% LIMITS definition: |
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if length(LIMITS) ~=7 |
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help volbet2iso.m |
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error('volbet2iso.m : LIMITS must contains 7 values') |
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return |
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end %if |
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OUTCROPS = sort( LIMITS(1:2) ); |
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H_MAX = LIMITS(3); |
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LAT_MAX = sort( LIMITS(4:5) ); |
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LONG_MAX = sort( LIMITS(6:7) ); |
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%%%%%%%%%%%%%%%%%% |
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% COMPUTE VOLUME % |
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%%%%%%%%%%%%%%%%%% |
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% It's computed as the difference between the northern outcrop volume |
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% and the southern outcrop one. |
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[V1 V1mat dV1] = subfct_getvol(TRACER,DEPTH,LAT,LONG,[OUTCROPS(1) H_MAX LAT_MAX LONG_MAX]); |
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[V2 V2mat dV2] = subfct_getvol(TRACER,DEPTH,LAT,LONG,[OUTCROPS(2) H_MAX LAT_MAX LONG_MAX]); |
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% Then: |
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V = max(V1,V2)-min(V1,V2); |
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gmaze |
1.3 |
% Last we determine the iso-0 volume limits: |
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V1mat = abs(V1mat - 1); |
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Vmat = (V1mat + V2mat)./2; |
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Vmat(find(Vmat<1)) = 0; |
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Vmat = logical(Vmat); |
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gmaze |
1.1 |
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%%%%%%%%%%% |
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% OUTPUTS % |
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%%%%%%%%%%% |
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switch nargout |
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gmaze |
1.3 |
case {0,1} |
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gmaze |
1.1 |
varargout(1) = {V}; |
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case 2 |
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varargout(1) = {V}; |
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gmaze |
1.3 |
varargout(2) = {Vmat}; |
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gmaze |
1.1 |
case 3 |
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varargout(1) = {V}; |
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gmaze |
1.3 |
varargout(2) = {Vmat}; |
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gmaze |
1.1 |
varargout(3) = {dV1}; |
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end %switch nargout |
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