1 |
clear all |
%clear all |
2 |
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3 |
new = 'input.shelfice'; |
new = 'input.shelfice'; |
4 |
input = 'input'; |
input = 'input'; |
9 |
nz = 23; |
nz = 23; |
10 |
nt = 12; |
nt = 12; |
11 |
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12 |
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load MASKS |
13 |
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hf = msk; |
14 |
load FMT |
load FMT |
15 |
load HN |
load HN |
16 |
load ZN |
load ZN |
44 |
% create geopotential anomaly |
% create geopotential anomaly |
45 |
gravity = 9.81; |
gravity = 9.81; |
46 |
rho0 = 1035; |
rho0 = 1035; |
47 |
tol = 0; |
tol0 = 0; |
48 |
si2dbar = 1e-4; |
si2dbar = 1e-4; |
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phiHydC = zeros(nz,length(ix)); |
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phiHydF = zeros(nz+1,length(ix)); |
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49 |
disp('compute geopotential anomaly') |
disp('compute geopotential anomaly') |
50 |
load VGRID |
load VGRID |
51 |
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zg = zf; |
52 |
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dzm = abs([zg(1)-zc(1) .5*diff(zc)]); |
53 |
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dzp = abs([.5*diff(zc) zc(end)-zg(end)]); |
54 |
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hFacMin = 0.1; |
55 |
for ks=1:length(ix) |
for ks=1:length(ix) |
56 |
t0 = squeeze(mean(t(ix(ks),iy(ks),:,:),4)); |
t0 = squeeze(mean(t(ix(ks),iy(ks),:,:),4)); |
57 |
s0 = squeeze(mean(s(ix(ks),iy(ks),:,:),4)); |
s0 = squeeze(mean(s(ix(ks),iy(ks),:,:),4)); |
58 |
% compute potential anomaly exactly as in code |
% compute potential anomaly exactly as in code |
59 |
% for that we need the correct density |
% for that we need the correct density |
60 |
rho = []; |
rho = []; |
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p = -zc(:)*gravity*rho0*si2dbar; |
p = abs(zc(:))*gravity*rho0*si2dbar; |
62 |
dp = p; |
dp = p; |
63 |
tol1 = 1; |
tol1 = 1; |
64 |
tol2 = 2; |
tol2 = 2; |
65 |
kw = 0; |
kp = 0; |
66 |
while tol1 > tol |
while tol1 > tol0 |
67 |
kw = kw+1; |
kp = kp+1; |
68 |
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p0 = p; |
69 |
if strcmp(eostype,'mdjwf') |
if strcmp(eostype,'mdjwf') |
70 |
rho = [rho densmdjwf(s0,t0,p(:,end))]; |
drho = densmdjwf(s0,t0,p(:,end))-rho0; |
71 |
else |
else |
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error(['unknown eostype: ' eostype]); |
error(['unknown eostype: ' eostype]); |
73 |
end |
end |
74 |
p = [p -zc(:).*rho(:,end)*gravity*si2dbar]; |
phiHydF(1) = 0; |
75 |
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for k=1:length(zc(:)); |
76 |
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phiHydC(k) = phiHydF(k) + dzm(k)*gravity*drho(k)/rho0; |
77 |
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phiHydF(k+1) = phiHydC(k) + dzp(k)*gravity*drho(k)/rho0; |
78 |
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end |
79 |
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p = [p (gravity*rho0*abs(zc(:)) + phiHydC(:)*rho0)/gravity/rho0]; |
80 |
dp = p(:,end)-p(:,end-1); |
dp = p(:,end)-p(:,end-1); |
81 |
tol2 = tol1; |
tol2 = tol1; |
82 |
tol1 = sqrt(sum(dp.^2)); |
tol1 = sqrt(sum(dp.^2)); |
83 |
if tol1==tol2; break; end; |
if tol1==tol2; break; end; |
84 |
end |
end |
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% now intergrate |
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drho = rho(:,end)-rho0; |
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for k=1:nz |
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drm = .5*dz(k); |
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if k==1; drm = zf(k)-zc(k); end |
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if k==nz; |
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drp = zc(k)-zf(k+1); |
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else |
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drp = .5*dz(k+1); |
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end |
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phiHydC(k,ks)=phiHydF(k,ks) + drm*gravity*drho(k)/rho0; |
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phiHydF(k+1,ks)=phiHydC(k,ks) +drp*gravity*drho(k)/rho0; |
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end |
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85 |
% find the appropriate level |
% find the appropriate level |
86 |
zloc = zn(is(ks)); |
zloc = zn(is(ks)); |
87 |
kl = max(find(zloc < zf)); |
kl0 = max(find(abs(zg-hFacMin*zg)<=abs(zloc))); |
88 |
ph(ks) = phiHydF(kl,ks); |
hfloc= squeeze(hf(ix(ks),iy(ks),:)); |
89 |
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kl = min(find(hfloc>0)); |
90 |
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if isempty(kl); |
91 |
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kl = 0; |
92 |
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ph(ks) = 0; |
93 |
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else |
94 |
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ph(ks) = phiHydF(kl); |
95 |
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end |
96 |
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disp(sprintf('kl0 = %u, kl = %u',kl0,kl)); |
97 |
end |
end |
98 |
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99 |
pload = 0*hn; |
pload = 0*hn; |