| 1 |
gmaze |
1.1 |
% |
| 2 |
|
|
% [] = D_COMPUTE_POTENTIAL_VORTICITY(SNAPSHOT,[WANTSPLPV]) |
| 3 |
|
|
% |
| 4 |
|
|
% For a time snapshot, this program multiplies the potential |
| 5 |
|
|
% vorticity computed with C_COMPUTE_POTENTIAL_VORTICITY by the |
| 6 |
|
|
% coefficient: -1/RHO |
| 7 |
|
|
% Optional flag WANTSPLPV is turn to 0 by default. Turn it to 1 |
| 8 |
|
|
% if the PV computed is the simple one (f.dSIGMATHETA/dz). |
| 9 |
|
|
% |
| 10 |
|
|
% 06/21/2006 |
| 11 |
|
|
% gmaze@mit.edu |
| 12 |
|
|
% |
| 13 |
|
|
|
| 14 |
|
|
|
| 15 |
|
|
function D_compute_potential_vorticity(snapshot,varargin) |
| 16 |
|
|
|
| 17 |
|
|
|
| 18 |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 19 |
|
|
%% Setup |
| 20 |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 21 |
|
|
global sla netcdf_RHO netcdf_PV netcdf_domain netcdf_suff |
| 22 |
|
|
pv_checkpath |
| 23 |
|
|
|
| 24 |
|
|
%% Flags to choose which term to compute (by default, all): |
| 25 |
|
|
FLpv3 = 1; |
| 26 |
|
|
if nargin==2 % case of optional flag presents: |
| 27 |
|
|
if varargin{1}(1) == 1 % Case of the simple PV: |
| 28 |
|
|
FLpv3 = 0; |
| 29 |
|
|
end |
| 30 |
|
|
end %if |
| 31 |
|
|
|
| 32 |
|
|
%% PV and RHO netcdf-files: |
| 33 |
|
|
filPV = strcat(netcdf_PV ,'.',netcdf_domain); |
| 34 |
|
|
filRHO = strcat(netcdf_RHO,'.',netcdf_domain); |
| 35 |
|
|
|
| 36 |
|
|
%% Path and extension to find them: |
| 37 |
|
|
pathname = strcat('netcdf-files',sla,snapshot); |
| 38 |
|
|
ext = strcat('.',netcdf_suff); |
| 39 |
|
|
|
| 40 |
|
|
%% Load netcdf files: |
| 41 |
|
|
ferfile = strcat(pathname,sla,filPV,ext); |
| 42 |
|
|
ncPV = netcdf(ferfile,'nowrite'); |
| 43 |
|
|
[PV_lon PV_lat PV_dpt] = coordfromnc(ncPV); |
| 44 |
|
|
|
| 45 |
|
|
ferfile = strcat(pathname,sla,filRHO,ext); |
| 46 |
|
|
ncRHO = netcdf(ferfile,'nowrite'); |
| 47 |
|
|
[RHO_lon RHO_lat RHO_dpt] = coordfromnc(ncRHO); |
| 48 |
|
|
|
| 49 |
|
|
%% Error check: |
| 50 |
|
|
if PV_dpt~RHO_dpt | PV_lon~RHO_lon | PV_lat~RHO_lat |
| 51 |
|
|
error('D_compute_potential_vorticity.m: RHO and PV fields must be defined on the same grid'); |
| 52 |
|
|
return; |
| 53 |
|
|
end |
| 54 |
|
|
|
| 55 |
|
|
%% Flags: |
| 56 |
|
|
global toshow % Turn to 1 to follow the computing process |
| 57 |
|
|
|
| 58 |
|
|
|
| 59 |
|
|
|
| 60 |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 61 |
|
|
%% Apply the coefficient |
| 62 |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 63 |
|
|
|
| 64 |
|
|
%% Pre-allocate: |
| 65 |
|
|
if toshow,disp('Pre-allocate');end |
| 66 |
|
|
PV = zeros(length(PV_dpt),length(PV_lat),length(PV_dpt)).*NaN; |
| 67 |
|
|
|
| 68 |
|
|
%% Apply: |
| 69 |
|
|
if toshow,disp('Multiplying PV field by -1/RHO'),end |
| 70 |
|
|
PV = - ncPV{4}(:,:,:) ./ ncRHO{4}(:,:,:) ; |
| 71 |
|
|
|
| 72 |
|
|
|
| 73 |
|
|
|
| 74 |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 75 |
|
|
% Record: |
| 76 |
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 77 |
|
|
if toshow,disp('Now reccording PV file ...'),end |
| 78 |
|
|
|
| 79 |
|
|
% General informations: |
| 80 |
|
|
if FLpv3 == 1 |
| 81 |
|
|
netfil = strcat('PV','.',netcdf_domain,'.',netcdf_suff); |
| 82 |
|
|
units = '1/s/m'; |
| 83 |
|
|
ncid = 'PV'; |
| 84 |
|
|
longname = 'Potential vorticity'; |
| 85 |
|
|
uniquename = 'potential_vorticity'; |
| 86 |
|
|
else |
| 87 |
|
|
netfil = strcat('splPV','.',netcdf_domain,'.',netcdf_suff); |
| 88 |
|
|
units = '1/s/m'; |
| 89 |
|
|
ncid = 'splPV'; |
| 90 |
|
|
longname = 'Simple Potential vorticity'; |
| 91 |
|
|
uniquename = 'simple_potential_vorticity'; |
| 92 |
|
|
end %if |
| 93 |
|
|
|
| 94 |
|
|
% Open output file: |
| 95 |
|
|
nc = netcdf(strcat(pathname,sla,netfil),'clobber'); |
| 96 |
|
|
|
| 97 |
|
|
% Define axis: |
| 98 |
|
|
nc('X') = length(PV_lon); |
| 99 |
|
|
nc('Y') = length(PV_lat); |
| 100 |
|
|
nc('Z') = length(PV_dpt); |
| 101 |
|
|
|
| 102 |
|
|
nc{'X'} = 'X'; |
| 103 |
|
|
nc{'Y'} = 'Y'; |
| 104 |
|
|
nc{'Z'} = 'Z'; |
| 105 |
|
|
|
| 106 |
|
|
nc{'X'} = ncfloat('X'); |
| 107 |
|
|
nc{'X'}.uniquename = ncchar('X'); |
| 108 |
|
|
nc{'X'}.long_name = ncchar('longitude'); |
| 109 |
|
|
nc{'X'}.gridtype = nclong(0); |
| 110 |
|
|
nc{'X'}.units = ncchar('degrees_east'); |
| 111 |
|
|
nc{'X'}(:) = PV_lon; |
| 112 |
|
|
|
| 113 |
|
|
nc{'Y'} = ncfloat('Y'); |
| 114 |
|
|
nc{'Y'}.uniquename = ncchar('Y'); |
| 115 |
|
|
nc{'Y'}.long_name = ncchar('latitude'); |
| 116 |
|
|
nc{'Y'}.gridtype = nclong(0); |
| 117 |
|
|
nc{'Y'}.units = ncchar('degrees_north'); |
| 118 |
|
|
nc{'Y'}(:) = PV_lat; |
| 119 |
|
|
|
| 120 |
|
|
nc{'Z'} = ncfloat('Z'); |
| 121 |
|
|
nc{'Z'}.uniquename = ncchar('Z'); |
| 122 |
|
|
nc{'Z'}.long_name = ncchar('depth'); |
| 123 |
|
|
nc{'Z'}.gridtype = nclong(0); |
| 124 |
|
|
nc{'Z'}.units = ncchar('m'); |
| 125 |
|
|
nc{'Z'}(:) = PV_dpt; |
| 126 |
|
|
|
| 127 |
|
|
% And main field: |
| 128 |
|
|
nc{ncid} = ncfloat('Z', 'Y', 'X'); |
| 129 |
|
|
nc{ncid}.units = ncchar(units); |
| 130 |
|
|
nc{ncid}.missing_value = ncfloat(NaN); |
| 131 |
|
|
nc{ncid}.FillValue_ = ncfloat(NaN); |
| 132 |
|
|
nc{ncid}.longname = ncchar(longname); |
| 133 |
|
|
nc{ncid}.uniquename = ncchar(uniquename); |
| 134 |
|
|
nc{ncid}(:,:,:) = PV; |
| 135 |
|
|
|
| 136 |
|
|
nc=close(nc); |
| 137 |
|
|
|
Parent Directory
| 
Revision Log
| 
Revision Graph