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write_ERA5_nc_4_ww3.m
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write_ERA5_nc_4_ww3.m
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clear
close all
%run('/scale_wlg_persistent/filesets/home/santanarc/scripts/niwa/matlab/startup.m')
% Daily time
time_lima=datenum(1983,1,1,0,0,0):1:datenum(1985,12,31,0,0,0); % Gr
%time_lima=datenum(2004,1,1,0,0,0):1:datenum(2020,12,31,0,0,0); %
%time_lima=datenum(1992,2,29,0,0,0):1:datenum(1992,2,29,0,0,0); %
%time_lima=datenum(2014,01,01,0,0,0):1:datenum(2014,12,31,0,0,0);
%time_lima=datenum(2015,01,01,0,0,0):1:datenum(2015,12,31,0,0,0);
%time_lima=datenum(2023,1,1,0,0,0):1:datenum(2023,12,31,0,0,0);
%time_lima=datenum(2020,12,1,0,0,0):1:datenum(2020,12,31,0,0,0);
%time_lima=datenum(2022,1,1,0,0,0):1:datenum(2022,12,31,0,0,0);
path_ou='/scale_wlg_nobackup/filesets/nobackup/niwa03150/WAVE/hindcast/ERA5/';
path_in=path_ou;
vars=[1,2];
% ERA5_siconc_y1985.nc
% ERA5_u10_y1985.nc
% ERA5_v10_y1985.nc
prefixs ={'ERA5_'}; % prior to 2015/01/01
vnames ={'u10_y','siconc_y'}; % (ua for wind) always with /
scrsz=[1 1 1366 768];
scrsz=[2 42 958 953];
%scrsz=get(0,'screensize');
fold=''; % temporary old filename
for vr=vars
vname ={vnames{vr}};
prefix={prefixs{1}};
% Loop in model time
for t=time_lima
vn=vname{1};
ptime=datestr(t,'YYYY');
ftime=datestr(t,'YYYYmmDDHH');
fname=[path_in,prefix{1},vname{1},ptime,'.nc'];
display(['Loading: ',fname]);
if strcmp(fname,fold)~=1
display(['Reading lon, lat, time']); tic;
FillValue=ncreadatt(fname,vn(1:end-2),'_FillValue');
lon=(ncread(fname,'longitude'));
lat=(ncread(fname,'latitude'));
% flipping latitude so it starts at -90
lat=flipud(lat);
timew=squeeze(double(ncread(fname,'time')));
time_ini=datenum(1900,1,1);
time_mat=(timew./(24))+time_ini;
timed=datevec(time_mat);
toc
end
% find indexes of the selected day on nc file
td=datevec(t);
it=find(timed(:,1)==td(:,1) & timed(:,2)==td(:,2) & timed(:,3)==td(:,3));
if it(end)~=length(timew)
it(end+1)=it(end)+1;
end
% time variable that will be written in the nc file
timewit=timew(it);
if strcmp(vname{1},'u10_y')
display(['Reading winds']); tic;
fname=[path_in,prefix{1},vname{1},ptime,'.nc'];
ua=squeeze((ncread(fname,'u10', [1 1 it(1)],[Inf Inf it(end)-it(1)+1])));
fname=[path_in,prefix{1},'v10_y',ptime,'.nc'];
va=squeeze((ncread(fname,'v10', [1 1 it(1)],[Inf Inf it(end)-it(1)+1])));
% flipping u and v according to latitude
ua=fliplr(ua);
va=fliplr(va);
path_out=[path_ou,ptime,'/'];
system(['mkdir -p ',path_out]);
fda=[path_out,'winds_10m_era5_',ftime,'.nc'];
display(['Saving: ',fda]);
if exist(fda)==2
system(['rm -rf ',fda]);
end
% creating nc and variables
ncid = netcdf.create(fda,'NETCDF4');
% time
dtime = netcdf.defDim(ncid,'time',length(it));
varid = netcdf.defVar(ncid,'time','double',dtime);
netcdf.putVar(ncid,varid,timewit)
netcdf.putAtt(ncid,varid,'standard_name',"time");
netcdf.putAtt(ncid,varid,'calendar',"gregorian");
netcdf.putAtt(ncid,varid,'units',"hours since 1900-01-01 00:00:00.0");
% lon
dlon = netcdf.defDim(ncid,'lon',length(lon));
varid = netcdf.defVar(ncid,'lon','double',dlon);
netcdf.putVar(ncid,varid,lon)
% lat
dlat = netcdf.defDim(ncid,'lat',length(lat));
varid = netcdf.defVar(ncid,'lat','double',dlat);
netcdf.putVar(ncid,varid,lat)
% ua
uvar = netcdf.defVar(ncid,'ua','float', [dlon dlat dtime]);
netcdf.defVarFill(ncid,uvar,false,FillValue);
netcdf.putVar(ncid,uvar,ua)
netcdf.putAtt(ncid,uvar,'standard_name',"eastward_wind");
netcdf.putAtt(ncid,uvar,'units',"m s-1");
% va
vvar = netcdf.defVar(ncid,'va','float', [dlon dlat dtime]);
netcdf.defVarFill(ncid,vvar,false,FillValue);
netcdf.putVar(ncid,vvar,va)
netcdf.putAtt(ncid,vvar,'standard_name',"northward_wind");
netcdf.putAtt(ncid,vvar,'units',"m s-1");
netcdf.close(ncid);
elseif strcmp(vname{1},'siconc_y')
display(['Reading sic']); tic;
sic=squeeze((ncread(fname,'siconc', [1 1 it(1)],[Inf Inf it(end)-it(1)+1])));
% flipping u and v according to latitude
sic=fliplr(sic);
path_out=[path_ou,ptime,'/'];
system(['mkdir -p ',path_out]);
fda=[path_out,'sic_era5_',ftime,'.nc'];
display(['Saving: ',fda]);
if exist(fda)==2
system(['rm -rf ',fda]);
end
% creating nc and variables
ncid = netcdf.create(fda,'NETCDF4');
% time
dtime = netcdf.defDim(ncid,'time',length(it));
varid = netcdf.defVar(ncid,'time','double',dtime);
netcdf.putVar(ncid,varid,timewit)
netcdf.putAtt(ncid,varid,'standard_name',"time");
netcdf.putAtt(ncid,varid,'calendar',"gregorian");
netcdf.putAtt(ncid,varid,'units',"hours since 1900-01-01 00:00:00.0");
% lon
dlon = netcdf.defDim(ncid,'lon',length(lon));
varid = netcdf.defVar(ncid,'lon','double',dlon);
netcdf.putVar(ncid,varid,lon)
% lat
dlat = netcdf.defDim(ncid,'lat',length(lat));
varid = netcdf.defVar(ncid,'lat','double',dlat);
netcdf.putVar(ncid,varid,lat)
% sic
sicvar = netcdf.defVar(ncid,'sic','float', [dlon dlat dtime]);
netcdf.defVarFill(ncid,sicvar,false,FillValue);
netcdf.putVar(ncid,sicvar,sic)
netcdf.putAtt(ncid,sicvar,'standard_name',"sea_ice_area_fraction");
netcdf.putAtt(ncid,sicvar,'units',"1");
netcdf.close(ncid);
end % if strcmp(prefix
end
end