1 | function ext_tracers_ini(ininame,grdname,seas_datafile,ann_datafile,... |
---|
2 | dataname,vname,type,tini); |
---|
3 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
---|
4 | % |
---|
5 | % P. Marchesiello - 2005. Adapted from P. Penven's ext_tracers.m |
---|
6 | % |
---|
7 | % Ext tracers in a ROMS initial file |
---|
8 | % take seasonal data for the upper levels and annual data for the |
---|
9 | % lower levels |
---|
10 | % |
---|
11 | % input: |
---|
12 | % ininame : ROMS initial file name |
---|
13 | % grdname : ROMS grid file name |
---|
14 | % seas_datafile : regular longitude - latitude - z seasonal data |
---|
15 | % file used for the upper levels (netcdf) |
---|
16 | % ann_datafile : regular longitude - latitude - z annual data |
---|
17 | % file used for the lower levels (netcdf) |
---|
18 | % dataname : variable name in data file |
---|
19 | % vname : variable name in ROMS file |
---|
20 | % type : position on C-grid ('r', 'u', 'v', 'p') |
---|
21 | % tini : initialisation time [days] |
---|
22 | % |
---|
23 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
---|
24 | disp(' ') |
---|
25 | % |
---|
26 | % set the value of ro (oa decorrelation scale [m]) |
---|
27 | % and default (value if no data) |
---|
28 | % |
---|
29 | ro=0; |
---|
30 | default=NaN; |
---|
31 | disp([' Ext tracers: ro = ',num2str(ro/1000),... |
---|
32 | ' km - default value = ',num2str(default)]) |
---|
33 | |
---|
34 | % Open initial file |
---|
35 | % |
---|
36 | nc=netcdf(ininame,'write'); |
---|
37 | theta_s = nc{'theta_s'}(:); |
---|
38 | theta_b = nc{'theta_b'}(:); |
---|
39 | hc = nc{'hc'}(:); |
---|
40 | N = length(nc('s_rho')); |
---|
41 | % |
---|
42 | % Open and Read grid file |
---|
43 | % |
---|
44 | ng=netcdf(grdname); |
---|
45 | lon=ng{'lon_rho'}(:); |
---|
46 | lat=ng{'lat_rho'}(:); |
---|
47 | h=ng{'h'}(:); |
---|
48 | close(ng); |
---|
49 | [M,L]=size(lon); |
---|
50 | % |
---|
51 | % Read seasonal datafile |
---|
52 | % |
---|
53 | ncseas=netcdf(seas_datafile); |
---|
54 | X=ncseas{'X'}(:); |
---|
55 | Y=ncseas{'Y'}(:); |
---|
56 | Zseas=-ncseas{'Z'}(:); |
---|
57 | T=ncseas{'T'}(:).*30; |
---|
58 | tlen=length(T); |
---|
59 | Nzseas=length(Zseas); |
---|
60 | % |
---|
61 | % Read annual datafile |
---|
62 | % |
---|
63 | ncann=netcdf(ann_datafile); |
---|
64 | Zann=-ncann{'Z'}(:); |
---|
65 | Nz=length(Zann); |
---|
66 | % |
---|
67 | % Determine time index to process |
---|
68 | % |
---|
69 | ll=find(T<=tini); |
---|
70 | if (size(ll,1) ~= 0) |
---|
71 | l=ll(size(ll,1)); |
---|
72 | else |
---|
73 | l=1; |
---|
74 | end |
---|
75 | disp([' ext_tracers_ini: time index: ',num2str(l),' of total: ',num2str(tlen)]) |
---|
76 | % |
---|
77 | % get a subgrid |
---|
78 | % |
---|
79 | dl=1; |
---|
80 | lonmin=min(min(lon))-dl; |
---|
81 | lonmax=max(max(lon))+dl; |
---|
82 | latmin=min(min(lat))-dl; |
---|
83 | latmax=max(max(lat))+dl; |
---|
84 | % |
---|
85 | j=find(Y>=latmin & Y<=latmax); |
---|
86 | i1=find(X-360>=lonmin & X-360<=lonmax); |
---|
87 | i2=find(X>=lonmin & X<=lonmax); |
---|
88 | i3=find(X+360>=lonmin & X+360<=lonmax); |
---|
89 | x=cat(1,X(i1)-360,X(i2),X(i3)+360); |
---|
90 | y=Y(j); |
---|
91 | % |
---|
92 | %------------------------------------------------------------ |
---|
93 | % Horizontal interpolation |
---|
94 | %------------------------------------------------------------ |
---|
95 | % |
---|
96 | % |
---|
97 | % Interpole annual dataset on horizontal ROMS grid |
---|
98 | % |
---|
99 | if Nz > Nzseas |
---|
100 | if Zseas~=Zann(1:length(Zseas)) |
---|
101 | error('vertical levels dont match') |
---|
102 | end |
---|
103 | datazgrid=zeros(Nz,M,L); |
---|
104 | missval=ncann{dataname}.missing_value(:); |
---|
105 | for k=Nzseas+1:Nz |
---|
106 | if ~isempty(i2) |
---|
107 | data=squeeze(ncann{dataname}(k,j,i2)); |
---|
108 | else |
---|
109 | data=[]; |
---|
110 | end |
---|
111 | if ~isempty(i1) |
---|
112 | data=cat(2,squeeze(ncann{dataname}(k,j,i1)),data); |
---|
113 | end |
---|
114 | if ~isempty(i3) |
---|
115 | data=cat(2,data,squeeze(ncann{dataname}(k,j,i3))); |
---|
116 | end |
---|
117 | data=get_missing_val(x,y,data,missval,ro,default); |
---|
118 | datazgrid(k,:,:)=interp2(x,y,data,lon,lat,'cubic'); |
---|
119 | end |
---|
120 | end |
---|
121 | close(ncann); |
---|
122 | % |
---|
123 | % interpole seasonal dataset on horizontal roms grid |
---|
124 | % |
---|
125 | disp([' ext_tracers_ini: horizontal interpolation of seasonal data']) |
---|
126 | missval=ncseas{dataname}.missing_value(:); |
---|
127 | if Nz <= Nzseas |
---|
128 | datazgrid=zeros(Nz,M,L); |
---|
129 | end |
---|
130 | for k=1:min([Nz Nzseas]) |
---|
131 | if ~isempty(i2) |
---|
132 | data=squeeze(ncseas{dataname}(l,k,j,i2)); |
---|
133 | else |
---|
134 | data=[]; |
---|
135 | end |
---|
136 | if ~isempty(i1) |
---|
137 | data=cat(2,squeeze(ncseas{dataname}(l,k,j,i1)),data); |
---|
138 | end |
---|
139 | if ~isempty(i3) |
---|
140 | data=cat(2,data,squeeze(ncseas{dataname}(l,k,j,i3))); |
---|
141 | end |
---|
142 | data=get_missing_val(x,y,data,missval,ro,default); |
---|
143 | datazgrid(k,:,:)=interp2(x,y,data,lon,lat,'cubic'); |
---|
144 | end |
---|
145 | close(ncseas); |
---|
146 | % |
---|
147 | %---------------------------------------------------- |
---|
148 | % Vertical interpolation |
---|
149 | %----------------------------------------------------- |
---|
150 | % |
---|
151 | disp(' ext_tracers_ini: vertical interpolation') |
---|
152 | % |
---|
153 | % Get the sigma depths |
---|
154 | % |
---|
155 | zroms=zlevs(h,0.*h,theta_s,theta_b,hc,N,'r'); |
---|
156 | if type=='u' |
---|
157 | zroms=rho2u_3d(zroms); |
---|
158 | end |
---|
159 | if type=='v' |
---|
160 | zroms=rho2v_3d(zroms); |
---|
161 | end |
---|
162 | zmin=min(min(min(zroms))); |
---|
163 | zmax=max(max(max(zroms))); |
---|
164 | % |
---|
165 | % Check if the min z level is below the min sigma level |
---|
166 | % (if not add a deep layer) |
---|
167 | % |
---|
168 | z=Zann; |
---|
169 | addsurf=max(z)<zmax; |
---|
170 | addbot=min(z)>zmin; |
---|
171 | if addsurf |
---|
172 | z=[100;z]; |
---|
173 | end |
---|
174 | if addbot |
---|
175 | z=[z;-100000]; |
---|
176 | end |
---|
177 | Nz=min(find(z<zmin)); |
---|
178 | z=z(1:Nz); |
---|
179 | var=datazgrid; clear datazgrid; |
---|
180 | if addsurf |
---|
181 | var=cat(1,var(1,:,:),var); |
---|
182 | end |
---|
183 | if addbot |
---|
184 | var=cat(1,var,var(end,:,:)); |
---|
185 | end |
---|
186 | var=var(1:Nz,:,:); |
---|
187 | % |
---|
188 | % Do the vertical interpolation and write in inifile |
---|
189 | % |
---|
190 | nc{vname}(1,:,:,:)=ztosigma(flipdim(var,1),zroms,flipud(z)); |
---|
191 | close(nc); |
---|
192 | |
---|
193 | return |
---|