%
% 2D Advection Diffusion Forward Model
%
% E. Di Lorenzo, September 2012
%

%========================================================
function 	u = ADVOFF_bc(u);
%========================================================
% Impose closed boundary conditions
[I,J]=size(u);
x=1:I;
u(x,J)=u(x,J-1);
u(x,1)=u(x,1+1);
y=1:J;
u(I,y)=u(I-1,y);
u(1,y)=u(1+1,y);
return