1 | from common import * |
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2 | |
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3 | def plot_T850(lon,lat,T850): # T850 at final time |
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4 | print 'Reading data ...' |
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5 | lon, lat, T850 = lon[:], lat[:], T850[-1, :, :] |
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6 | print '... done.' |
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7 | plt.figure(figsize=(12,6)) |
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8 | plt.contourf(lon,lat,T850) |
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9 | plt.colorbar() |
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10 | plt.title('T850') |
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11 | axis_longitude() |
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12 | axis_latitude() |
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13 | plt.savefig('T850.png') |
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14 | |
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15 | def plot_dT(nlon,nlat,llm, lon,T,p,Phi): # perturbation temp, final time |
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16 | # vertical slice at final time |
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17 | print 'Reading data ...' |
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18 | T,p, Phi = T[-1,:,nlat/2,:], p[-1,:,nlat/2,:], Phi[-1,:,nlat/2,:] |
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19 | print '... done.' |
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20 | Cpd, kappa, g = 1004.5, 0.2857143, 9.80616 |
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21 | N, Teq, peq = 0.01, 300., 1e5 |
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22 | N2, g2 = N*N, g*g |
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23 | G = g2/(N2*Cpd) |
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24 | |
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25 | lon2, z = np.zeros((llm,nlon)), np.zeros((llm,nlon)) |
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26 | for lev in range(llm): |
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27 | z[lev,:] = (.5/g)*(Phi[lev,:]+Phi[lev+1,:]) # average from interfaces to full levels |
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28 | lon2[lev,:] = lon[:] |
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29 | |
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30 | theta = T*((peq/p)**kappa) |
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31 | Thetab = Teq*np.exp(N2*z/g) |
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32 | Tb = G + (Teq-G)*np.exp(N2*z/g) # background temperature |
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33 | plt.figure(figsize=(12,6)) |
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34 | plt.contourf(lon2,z,theta-Thetab, levels=np.arange(-0.12,0.12,0.02) ) |
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35 | plt.colorbar() |
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36 | plt.title('$\\Theta\'$') |
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37 | axis_longitude() |
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38 | plt.ylabel('z (m)') |
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39 | plt.yticks(np.arange(0, 10001, 1000)) |
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40 | plt.savefig('dT.png') |
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41 | |
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42 | gridfile = 'netcdf/output_dcmip2016_regular.nc' |
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43 | nc = cdf.Dataset(gridfile, "r") |
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44 | llm, nlon, nlat, ntime = getdims(nc, 'lev','lon','lat','time_counter') |
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45 | lon, lat, T850, T, Phi, p = getvars(nc, 'lon','lat','T850', 'T', 'PHI','P') |
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46 | plot_dT(nlon,nlat,llm, lon,T,p,Phi) |
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47 | plot_T850(lon,lat,T850) |
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