function [lat,lon,mask,xi]=get_vort(hisfile,gridfile,tindex,vlevel,coef) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % Compute the vorticity % % Further Information: % http://www.croco-ocean.org % % This file is part of CROCOTOOLS % % CROCOTOOLS is free software; you can redistribute it and/or modify % it under the terms of the GNU General Public License as published % by the Free Software Foundation; either version 2 of the License, % or (at your option) any later version. % % CROCOTOOLS is distributed in the hope that it will be useful, but % WITHOUT ANY WARRANTY; without even the implied warranty of % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the % GNU General Public License for more details. % % You should have received a copy of the GNU General Public License % along with this program; if not, write to the Free Software % Foundation, Inc., 59 Temple Place, Suite 330, Boston, % MA 02111-1307 USA % % Copyright (c) 2002-2006 by Pierrick Penven % e-mail:Pierrick.Penven@ird.fr % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % Get the grid parameters % [lat,lon,mask]=read_latlonmask(gridfile,'r'); mask(2:end-1,2:end-1)=mask(1:end-2,1:end-2).*... mask(1:end-2,2:end-1).*... mask(1:end-2,3:end).*... mask(2:end-1,1:end-2).*... mask(2:end-1,2:end-1).*... mask(2:end-1,3:end).*... mask(3:end,1:end-2).*... mask(3:end,2:end-1).*... mask(3:end,3:end); nc=netcdf(gridfile); pm=nc{'pm'}(:); pn=nc{'pn'}(:); close(nc); % % Get the currents % if vlevel==0 u=get_hslice(hisfile,gridfile,'ubar',tindex,vlevel,'u'); v=get_hslice(hisfile,gridfile,'vbar',tindex,vlevel,'v'); else u=get_hslice(hisfile,gridfile,'u',tindex,vlevel,'u'); v=get_hslice(hisfile,gridfile,'v',tindex,vlevel,'v'); end % % Get vorticity at rho points % xi=coef.*mask.*psi2rho(vorticity(u,v,pm,pn));