1 | ; |
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2 | ; compute slope of linear regression of one 3D (x,y,t) field with a 1D time serie |
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3 | |
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4 | FUNCTION make_linfitdom, file_name, ncdf_db, BOXZOOM = boxzoom, TIME_1 = time_1, TIME_2 = time_2, ALL_DATA = all_data |
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5 | |
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6 | @common |
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7 | @com_eg |
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8 | |
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9 | IF debug_w THEN print, ' ENTER make_linfitdom... ' |
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10 | |
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11 | var_name1 = (strsplit(macro_base_fld, ',', ESCAPE = ' ', /EXTRACT))[0] |
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12 | domain = (strsplit(macro_base_fld, ',', ESCAPE = ' ', /EXTRACT))[1] |
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13 | |
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14 | ; Read the variables in the correspondant netcdf file |
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15 | var1 = nc_read(file_name, var_name1, ncdf_db, BOXZOOM = boxzoom, TIME_1 = time_1, TIME_2 = time_2) |
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16 | ; Read domain variable |
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17 | |
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18 | domain_db = hom_idl+'ENSO_works/data/1d_ncdf/' |
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19 | |
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20 | file_domain = domain_db+domain+'_'+cmd1_back.exp+'_'+cmd1_back.date1+'_'+cmd1_back.spec+'.nc' |
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21 | IF debug_w THEN print, ' file_domain: ', file_domain |
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22 | |
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23 | var_dom = ncdf_lec(file_domain, var = domain) |
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24 | |
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25 | IF debug_w THEN print, ' size of var_dom: ', size(var_dom) |
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26 | |
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27 | IF (size(var_dom))[1] NE jpt THEN BEGIN |
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28 | print, ' *** mistmatch in time dimension :', (size(var_dom))[1], jpt |
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29 | print, ' for file :', file_domain |
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30 | stop |
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31 | ENDIF |
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32 | |
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33 | varname = var1.name+'/'+domain+' linfit.' |
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34 | varunit = '[-1/1]' |
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35 | |
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36 | nxa = (size(var1.data))[1] |
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37 | nya = (size(var1.data))[2] |
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38 | |
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39 | IF debug_w THEN print, ' nxa, nya', nxa, nya |
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40 | |
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41 | pt_linfit = fltarr(nxa, nya) |
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42 | pt_err = fltarr(nxa, nya) |
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43 | pt_corr = fltarr(nxa, nya) |
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44 | pt_linfit[*, *] = 0 |
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45 | pt_err[*, *] = 1.1 |
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46 | pt_corr[*, *] = 0. |
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47 | |
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48 | ; Sampling of data and computation of new numbers of values |
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49 | @mth_decode |
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50 | |
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51 | FOR imth = 0, nmth-1 DO BEGIN |
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52 | |
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53 | IF debug_w THEN print, ' month idx/value: ', imth, strd(imth) |
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54 | |
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55 | data1 = (var1.data)[*, *, reform(idxm(imth,*), njpt)] |
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56 | var_domc = (var_dom)[reform(idxm(imth,*), njpt)] |
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57 | var_domc = var_domc-mean(var_domc) |
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58 | nval = njpt |
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59 | |
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60 | ; Compute linear regression |
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61 | |
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62 | FOR idx = 0, nxa-1 DO FOR idy = 0, nya-1 DO BEGIN |
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63 | |
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64 | IF data1(idx, idy, 0) NE valmask THEN BEGIN |
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65 | |
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66 | x1i = reform(data1(idx, idy, *), nval) |
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67 | x1 = x1i-mean(x1i) |
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68 | |
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69 | IF linfit_map NE '' THEN BEGIN |
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70 | ; compute regression for value above (p - default) or below (m) linfit_sep |
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71 | CASE linfit_map OF |
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72 | 'm': idt = where (var_domc LE linfit_sep) |
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73 | ELSE: idt = where (var_domc GE linfit_sep) |
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74 | ENDCASE |
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75 | x1 = x1(idt) |
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76 | var_domc = var_domc(idt) |
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77 | ENDIF |
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78 | |
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79 | coeffl = linfit(var_domc, x1, CHISQ = linerrl, PROB = proberrl, SIGMA = sigmaerrl) |
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80 | correl = c_timecorrelate(var_domc,x1) |
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81 | pt_linfit(idx, idy) = pt_linfit(idx, idy)+coeffl(1) |
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82 | pt_err(idx, idy) = min(pt_err(idx, idy), proberrl) |
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83 | pt_corr(idx, idy) = pt_corr(idx, idy) + correl |
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84 | |
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85 | IF debug_w THEN BEGIN |
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86 | IF idx EQ 30 AND idy EQ 15 THEN BEGIN |
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87 | print, ' idx, idy, linfit_map ', idx, idy, linfit_map |
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88 | print, ' size(idt)',size(idt) |
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89 | print, ' pt_linfit, correl = ',coeffl(1), correl |
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90 | stop |
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91 | ENDIF |
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92 | ENDIF |
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93 | |
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94 | ENDIF ELSE BEGIN |
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95 | pt_linfit(idx, idy) = valmask |
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96 | pt_err(idx, idy) = 0. |
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97 | pt_corr(idx, idy) = 0. |
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98 | ENDELSE |
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99 | |
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100 | ENDFOR |
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101 | ENDFOR |
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102 | |
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103 | ; make mean of period |
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104 | |
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105 | idm = where(pt_linfit GE valmask/10.) |
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106 | pt_linfit = pt_linfit/float(nmth) |
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107 | pt_corr = pt_corr/float(nmth) |
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108 | IF idm[0] NE -1 THEN pt_linfit(idm) = valmask |
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109 | |
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110 | ; only take points where ABS(correlation) larger than a value |
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111 | |
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112 | idc = where(abs(pt_corr) LT 0.1) |
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113 | pt_linfit(idc) = !values.f_nan |
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114 | |
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115 | varname = varname+' '+ntxt |
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116 | |
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117 | print, ' Linfitdom min/max pt_corr ', min(pt_corr), max(pt_corr) |
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118 | |
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119 | ; Define the outputs of the function |
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120 | field = {name: varname, data: pt_linfit, legend: '', units: '', origin: '', dim: 0, direc:'xy'} |
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121 | field.origin = var1.origin |
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122 | field.dim = var1.dim |
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123 | |
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124 | CASE linfit_map OF |
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125 | 'p': BEGIN |
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126 | print, ' Linear fit computed for anomalies ABOVE ',linfit_sep |
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127 | lintxt = ' > '+ strtrim(string(linfit_sep), 2) |
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128 | END |
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129 | 'm': BEGIN |
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130 | print, ' Linear fit computed for anomalies BELOW ',linfit_sep |
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131 | lintxt = ' < '+ strtrim(string(linfit_sep), 2) |
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132 | END |
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133 | ELSE: lintxt = '' |
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134 | ENDCASE |
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135 | |
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136 | field.legend = lintxt+' for '+ntxt+' in ['+cmdm.date1+'-'+cmdm.spec+'] -' |
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137 | |
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138 | ; additional computations (pac_5 nino_3 nino_4 averages) *** requires whole domain **** |
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139 | |
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140 | IF nxt EQ jpi AND nyt EQ jpj THEN BEGIN |
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141 | |
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142 | n3_linfit = moyenne(pt_linfit,'xy', boite = [210, 270, -5, 5], NaN = valmask) |
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143 | n4_linfit = moyenne(pt_linfit,'xy', boite = [160, 210, -5, 5], NaN = valmask) |
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144 | zl_linfit = moyenne(pt_linfit,'xy', boite = [130, 280, -5, 5], NaN = valmask) |
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145 | |
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146 | print, ' Nino 3 average of slope of linear fit = ', n3_linfit |
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147 | print, ' Nino 4 average of slope of linear fit = ', n4_linfit |
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148 | print, ' Zonal 5N/5S average of slope of linear fit = ', zl_linfit |
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149 | |
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150 | ENDIF |
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151 | |
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152 | ; jpt=nval |
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153 | ; meants=grossemoyenne(data2, 't') |
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154 | ; meantsp=reform(meants,nxt*nyt) |
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155 | ; meanlf=reform(pt_linfit,nxt*nyt) |
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156 | ; IF min (meantsp) GE 100 THEN meantsp=meantsp-273.15 |
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157 | ; pltsc, meanlf,meantsp,-70,30,20,34,"SST "+mth[strd-1], window=2 |
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158 | ; pltsc, meanlf,meantsp,-70,30,20,34,"SST "+mth[strd-1], window=2, /noerase, /ov1d, col1d=2 |
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159 | |
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160 | ; stop |
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161 | |
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162 | IF debug_w THEN print, ' ... EXIT make_linfitdom' |
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163 | |
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164 | return, field |
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165 | |
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166 | END |
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