1 | #!/usr/bin/env python |
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2 | # -*- coding: utf-8 -*- |
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3 | import string |
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4 | import numpy as np |
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5 | import matplotlib.pyplot as plt |
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6 | from pylab import * |
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7 | from mpl_toolkits.basemap import Basemap |
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8 | from mpl_toolkits.basemap import shiftgrid, cm |
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9 | from netCDF4 import Dataset |
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10 | import arctic_map # function to regrid coast limits |
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11 | import cartesian_grid_test # function to convert grid from polar to cartesian |
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12 | import scipy.special |
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13 | import ffgrid2 |
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14 | import map_ffgrid |
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15 | from matplotlib import colors |
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16 | from matplotlib.font_manager import FontProperties |
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17 | import map_cartesian_grid |
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18 | |
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19 | |
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20 | |
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21 | |
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22 | MONTH = np.array(['01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12']) |
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23 | month = np.array(['JANUARY', 'FEBRUARY', 'MARCH', 'APRIL', 'MAY', 'JUNE', 'JULY', 'AUGUST', 'SEPTEMBER', 'OCTOBER', 'NOVEMBER', 'DECEMBER']) |
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24 | month_day = np.array([31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]) |
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25 | M = len(month) |
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26 | |
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27 | frequ = np.array([23, 50, 89]) |
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28 | |
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29 | |
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30 | ################################# |
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31 | # read .dat files of AMSUA data # |
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32 | ################################# |
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33 | AS = np.zeros([len(frequ), M], float) |
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34 | AL = np.zeros([len(frequ), M], float) |
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35 | for ifr in range (0, len(frequ)): |
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36 | fichier = open('/net/argos/data/parvati/lahlod/ARCTIC/AMSUA_ice_class/AMSUA' + str(frequ[ifr]) + '_data_classification_parameters_ice_no-ice_2009.dat','r') |
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37 | numlines = 0 |
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38 | for line in fichier: numlines += 1 |
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39 | fichier.close() |
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40 | fichier = open('/net/argos/data/parvati/lahlod/ARCTIC/AMSUA_ice_class/AMSUA' + str(frequ[ifr]) + '_data_classification_parameters_ice_no-ice_2009.dat','r') |
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41 | nbtotal = numlines - 1 |
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42 | iligne = 0 |
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43 | mo = np.zeros([nbtotal],object) |
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44 | tot_area_spec = np.zeros([nbtotal],float) |
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45 | tot_area_lamb = np.zeros([nbtotal],float) |
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46 | while (iligne < nbtotal) : |
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47 | line=fichier.readline() |
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48 | # exemple : line = "0.22 2.3 5.0 6" |
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49 | liste = line.split() |
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50 | # exemple : listeCoord ['0.22', '2.3', '5.0', '6'] (liste de chaine de caract?es) |
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51 | mo[iligne] = str(liste[0]) |
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52 | tot_area_spec[iligne] = float(liste[9]) |
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53 | tot_area_lamb[iligne] = float(liste[10]) |
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54 | iligne=iligne+1 |
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55 | fichier.close() |
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56 | vec = np.arange(0, nbtotal + 51, 50) |
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57 | area_s = np.zeros([M], float) |
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58 | area_l = np.zeros([M], float) |
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59 | for imo in range (0, M): |
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60 | area_s[imo] = tot_area_spec[imo + vec[imo]] |
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61 | area_l[imo] = tot_area_lamb[imo + vec[imo]] |
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62 | AS[ifr, :] = area_s[:] |
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63 | AL[ifr, :] = area_l[:] |
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64 | |
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65 | |
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66 | |
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67 | ################################# |
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68 | # read .dat file of OSISAF data # |
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69 | ################################# |
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70 | fichier_osi = open('/net/argos/data/parvati/lahlod/ARCTIC/OSISAF_Ice_Types/OSISAF_daily_ice_no-ice_2009.dat','r') |
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71 | numlines = 0 |
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72 | for line in fichier_osi: numlines += 1 |
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73 | |
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74 | fichier_osi.close() |
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75 | fichier_osi = open('/net/argos/data/parvati/lahlod/ARCTIC/OSISAF_Ice_Types/OSISAF_daily_ice_no-ice_2009.dat','r') |
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76 | nbtotal = numlines - 1 |
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77 | iligne = 0 |
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78 | mo = np.zeros([nbtotal],object) |
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79 | tot_area_osi = np.zeros([nbtotal],float) |
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80 | while (iligne < nbtotal) : |
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81 | line=fichier_osi.readline() |
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82 | # exemple : line = "0.22 2.3 5.0 6" |
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83 | liste = line.split() |
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84 | # exemple : listeCoord ['0.22', '2.3', '5.0', '6'] (liste de chaine de caract?es) |
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85 | mo[iligne] = str(liste[0]) |
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86 | tot_area_osi[iligne] = float(liste[2]) |
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87 | iligne=iligne+1 |
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88 | |
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89 | fichier_osi.close() |
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90 | vec_osi = np.array([0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334]) |
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91 | area_osi = np.zeros([M], float) |
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92 | for imo in range (0, M): |
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93 | area_osi[imo] = tot_area_osi[imo + vec_osi[imo]] |
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94 | |
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95 | |
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96 | # calculation of bias and std between spec and lamb |
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97 | bias_area = np.zeros([len(frequ), M], float) |
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98 | for ifr in range (0, len(frequ)): |
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99 | for imo in range (0, M): |
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100 | bias_area[ifr, imo] = (AL[ifr, imo] - AS[ifr, imo]) / |
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101 | |
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102 | figure() |
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103 | plot(bias_area[0, :], 'c', label = 'spec_23GHz') |
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104 | plot(bias_area[1, :], 'm', label = 'spec_50GHz') |
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105 | plot(bias_area[2, :], 'g', label = 'spec_89GHz') |
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106 | |
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107 | |
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108 | |
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109 | ################################### |
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110 | # plot time evolution of ice area # |
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111 | ################################### |
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112 | color = np.array(['c', 'c--' 'm', 'm--', 'g', 'g--', 'k']) |
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113 | lbl = np.array(['spec_23GHz', 'lamb_23GHz', 'spec_50GHz', 'lamb_50GHz', 'spec_89GHz', 'lamb_89GHz', 'OSISAF']) |
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114 | figure() |
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115 | plot(AS[0, :], 'c', label = 'spec_23GHz') |
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116 | plot(AL[0, :], 'c--', label = 'lamb_23GHz') |
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117 | plot(AS[1, :], 'm', label = 'spec_50GHz') |
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118 | plot(AL[1, :], 'm--', label = 'lamb_50GHz') |
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119 | plot(AS[2, :], 'g', label = 'spec_89GHz') |
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120 | plot(AL[2, :], 'g--', label = 'lamb_89GHz') |
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121 | plot(area_osi, 'k', label = 'OSISAF') |
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122 | fontP = FontProperties() |
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123 | fontP.set_size('small') |
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124 | legend(loc = 3, prop = fontP) |
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125 | ylabel('total ice area (in square km)') |
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126 | xticks(np.arange(0, M, 1), month, rotation = 25) |
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127 | xlim(-1, M) |
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128 | grid() |
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129 | plt.savefig('/usr/home/lahlod/twice_d/figure_output_ARCTIC/figure_output_CEN/compar_total_ice_area_AMSUA_SPEC_LAMB_OSISAF_2009.png') |
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