[502] | 1 | import numpy as np |
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| 2 | import netCDF4 as cdf |
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[504] | 3 | # select non-interactive backend, cf http://stackoverflow.com/questions/4931376/generating-matplotlib-graphs-without-a-running-x-server |
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| 4 | import matplotlib |
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| 5 | matplotlib.use('Agg') |
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[502] | 6 | import matplotlib.pyplot as plt |
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| 7 | |
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| 8 | def getdims(nc, *names): return [len(nc.dimensions[name]) for name in names] |
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| 9 | def getvars(nc, *names): return [nc.variables[name] for name in names] |
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| 10 | |
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| 11 | def axis_longitude(): |
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| 12 | plt.xlim((0,360)) |
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| 13 | plt.xlabel('longitude (degrees)') |
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| 14 | plt.xticks(np.arange(0,361,30)) |
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| 15 | |
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| 16 | def axis_latitude(): |
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| 17 | plt.ylim((-90,90)) |
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| 18 | plt.ylabel('latitude (degrees)') |
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| 19 | plt.yticks(np.arange(-90,91,30)) |
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| 20 | |
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[520] | 21 | def slice_lon(nlon,llm,lon,Phi): |
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| 22 | lon2, z = np.zeros((llm,nlon)), np.zeros((llm,nlon)) |
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| 23 | for lev in range(llm): |
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| 24 | # average from interfaces to full levels |
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| 25 | z[lev,:] = (.5/g)*(Phi[lev,:]+Phi[lev+1,:]) |
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| 26 | lon2[lev,:] = lon[:] |
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| 27 | return lon2, z |
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| 28 | |
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| 29 | #--------------------------- DCMIP21 --------------------------- |
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| 30 | |
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| 31 | def post_DCMIP21(): |
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| 32 | def plot_var(nlon,nlat,llm, lon,Phi,var,varname): |
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| 33 | # vertical slice at final time |
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| 34 | print 'Reading data ...' |
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| 35 | var, Phi = var[-1,:,nlat/2,:], Phi[-1,:,nlat/2,:] |
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| 36 | print '... done.' |
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| 37 | lon2, z = slice_lon(nlon,llm,lon,Phi) |
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| 38 | plt.figure(figsize=(12,6)) |
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| 39 | plt.contourf(lon2,z,var) |
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| 40 | plt.colorbar() |
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| 41 | plt.title('%s at final time'%varname) |
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| 42 | axis_longitude() |
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| 43 | plt.ylabel('z (m)') |
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| 44 | # plt.yticks(np.arange(0, 10001, 1000)) |
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| 45 | plt.savefig('%s.png'%varname) |
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| 46 | lon, lat, Omega,T,u,Phi = getvars(nc, 'lon','lat','OMEGA', 'T', 'U', 'PHI') |
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| 47 | plot_var(nlon,nlat,llm, lon,Phi,Omega,'Omega') |
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| 48 | plot_var(nlon,nlat,llm, lon,Phi,u,'u') |
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| 49 | plot_var(nlon,nlat,llm, lon,Phi,T,'T') |
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| 50 | |
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| 51 | #--------------------------- DCMIP31 --------------------------- |
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| 52 | |
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| 53 | def post_DCMIP31(): |
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| 54 | |
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| 55 | def plot_T850(lon,lat,T850): # T850 at final time |
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| 56 | print 'Reading data ...' |
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| 57 | lon, lat, T850 = lon[:], lat[:], T850[-1, :, :] |
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| 58 | print '... done.' |
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| 59 | plt.figure(figsize=(12,6)) |
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| 60 | plt.contourf(lon,lat,T850) |
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| 61 | plt.colorbar() |
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| 62 | plt.title('T850') |
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| 63 | axis_longitude() |
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| 64 | axis_latitude() |
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| 65 | plt.savefig('T850.png') |
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| 66 | |
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| 67 | def plot_dT(nlon,nlat,llm, lon,T,p,Phi): # perturbation temp, final time |
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| 68 | # vertical slice at final time |
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| 69 | print 'Reading data ...' |
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| 70 | T,p, Phi = T[-1,:,nlat/2,:], p[-1,:,nlat/2,:], Phi[-1,:,nlat/2,:] |
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| 71 | print '... done.' |
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| 72 | N, Teq, peq = 0.01, 300., 1e5 |
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| 73 | N2, g2 = N*N, g*g |
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| 74 | G = g2/(N2*Cpd) |
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| 75 | |
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| 76 | lon2, z = slice_lon(nlon,llm,lon,Phi) |
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| 77 | theta = T*((peq/p)**kappa) |
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| 78 | Thetab = Teq*np.exp(N2*z/g) |
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| 79 | plt.figure(figsize=(12,6)) |
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| 80 | plt.contourf(lon2,z,theta-Thetab, levels=np.arange(-0.12,0.12,0.02) ) |
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| 81 | plt.colorbar() |
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| 82 | plt.title('$\\Theta\'$') |
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| 83 | axis_longitude() |
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| 84 | plt.ylabel('z (m)') |
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| 85 | plt.yticks(np.arange(0, 10001, 1000)) |
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| 86 | plt.savefig('dT.png') |
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| 87 | |
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| 88 | lon, lat, T850, T, Phi, p = getvars(nc, 'lon','lat','T850', 'T', 'PHI','P') |
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| 89 | plot_dT(nlon,nlat,llm, lon,T,p,Phi) |
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| 90 | plot_T850(lon,lat,T850) |
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| 91 | |
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| 92 | #--------------------------- DCMIP41 --------------------------- |
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| 93 | |
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| 94 | def post_DCMIP41(): |
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| 95 | def plot_T850(day, lon,lat,T850): # T850 at final time |
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| 96 | print 'Reading data ...' |
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| 97 | lon, lat, T850 = lon[:], lat[:], T850[day-1, :, :] |
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| 98 | print '... done.' |
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| 99 | plt.figure(figsize=(12,5)) |
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| 100 | plt.contourf(lon,lat,T850) |
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| 101 | plt.colorbar() |
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| 102 | plt.title('T850 at day %d'%day) |
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| 103 | axis_longitude() |
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| 104 | axis_latitude() |
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| 105 | plt.savefig('T850_day%02d.png'%day) |
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| 106 | |
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| 107 | lon, lat, T850, T, Phi = getvars(nc, 'lon','lat','T850', 'T', 'PHI') |
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| 108 | plot_T850(7,lon,lat,T850) |
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| 109 | plot_T850(10,lon,lat,T850) |
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| 110 | plot_T850(30,lon,lat,T850) |
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| 111 | |
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| 112 | #------------------------ Held & Suarez ---------------------- |
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| 113 | |
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| 114 | post_held_suarez = post_DCMIP41 |
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| 115 | |
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| 116 | #--------------------------- MAIN ---------------------------- |
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| 117 | |
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| 118 | gridfile = 'netcdf/output_dcmip2016_regular.nc' |
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| 119 | nc = cdf.Dataset(gridfile, "r") |
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| 120 | llm, nlon, nlat, ntime = getdims(nc, 'lev','lon','lat','time_counter') |
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| 121 | Cpd, kappa, g = 1004.5, 0.2857143, 9.80616 |
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| 122 | |
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| 123 | # Now call a routine post_XXX() |
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