/[MITgcm]/MITgcm/verification/tutorial_deep_convection/input/gendata.m
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Contents of /MITgcm/verification/tutorial_deep_convection/input/gendata.m

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Revision 1.2 - (show annotations) (download)
Wed Apr 23 23:23:31 2008 UTC (16 years, 2 months ago) by jmc
Branch: MAIN
Changes since 1.1: +38 -19 lines
update this set-up : higher resolution and larger computational domain

1 % This is a matlab script that generates the input data
2
3 % Dimensions of grid
4 nx=100;
5 ny=100;
6 nz=50;
7 % Nominal depth of model (meters)
8 H=1000;
9 % Size of domain
10 Lx=2.0e3;
11 % Radius of cooling disk (m)
12 Rc=600.;
13 % Horizontal resolution (m)
14 dx=Lx/nx;
15 % Rotation
16 f=1.e-4;
17 % Stratification
18 N=0.0*(f*Rc/H);
19 % surface temperature
20 Ts=20.;
21 % Flux : Cooling disk & noise added to cooling
22 Qo=800; Q1=10;
23
24 % Gravity
25 g=10.;
26 % E.O.S.
27 alpha=2.e-4;
28
29 Tz=N^2/(g*alpha)
30
31 dz=H/nz;
32 sprintf('delZ = %d * %7.6g,',nz,dz)
33
34 x=(1:nx)*dx;x=x-mean(x);
35 y=(1:ny)*dx;y=y-mean(y);
36 z=-dz/2:-dz:-H;
37
38 % Temperature profile
39 Tref=Ts+Tz*z-mean(Tz*z);
40 [sprintf('Tref =') sprintf(' %8.6g,',Tref)]
41
42 % Surface heat flux : refine the grid (by 3 x 3) to assign mean heat flux
43 Q=Qo+Q1*(0.5+rand([nx,ny]));
44 Qc=zeros(nx,ny);
45 xc=x'*ones(1,ny); yc=ones(nx,1)*y;
46 for j=-1:1, for i=-1:1,
47 xs=xc+dx*i/3 ; ys=yc+dx*j/3; r2=xs.*xs+ys.*ys;
48 qs=Q/9; qs( find(r2 > Rc*Rc) )=0.;
49 Qc=Qc+qs;
50 end ; end
51 fid=fopen('Qnet.bin','w','b'); fwrite(fid,Qc,'real*8'); fclose(fid);
52
53 var=2*pi*[0:1000]/1000; xl=Rc*cos(var); yl=Rc*sin(var);
54 figure(1);clf;
55 var=Qc; var(find(var==0))=NaN;
56 imagesc(xc,yc,var'); set(gca,'YDir','normal');
57 caxis([-15 820]);
58 %change_colmap(-1);
59 colorbar
60 grid;
61 hold on
62 L=line(xl,yl);
63 set(L,'color',[0 0 0]);
64 hold off ;

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