1 | ;+ |
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2 | ; |
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3 | ; .. _q2m_correction_ncdf.pro: |
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4 | ; |
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5 | ; ======================= |
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6 | ; q2m_correction_ncdf.pro |
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7 | ; ======================= |
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8 | ; |
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9 | ; Correction of q2m on OAFLUX grid |
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10 | ; |
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11 | ; :file:`${PROJECT_OD}/erai_q2m_19890101_20091231_oafluxgrid.nc` have been |
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12 | ; produced by :ref:`d2m_to_q2m.pro`. |
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13 | ; |
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14 | ; Corrected q2m on OAFLUX grid is written in |
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15 | ; :file:`${PROJECT_OD}/TropFlux_q2m_19890101_20091231.nc` |
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16 | ; if this file not already exists. |
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17 | ; |
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18 | ; This file will be used by :ref:`TropFlux_19890101_20091231.pro`. |
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19 | ; |
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20 | ; .. graphviz:: |
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21 | ; |
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22 | ; digraph q2m_correction_ncdf { |
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23 | ; graph [ |
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24 | ; rankdir="LR", |
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25 | ; ] |
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26 | ; |
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27 | ; file_in [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/erai_q2m_19890101_20091231_oafluxgrid.nc"]; |
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28 | ; file_out [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/TropFlux_q2m_19890101_20091231.nc"]; |
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29 | ; |
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30 | ; q2m_correction_ncdf [shape=box, |
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31 | ; fontname=Courier, |
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32 | ; color=blue, |
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33 | ; URL="http://forge.ipsl.jussieu.fr/tropflux/browser/trunk/src/q2m_correction_ncdf.pro", |
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34 | ; label="${PROJECT}/src/q2m_correction_ncdf.pro"]; |
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35 | ; |
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36 | ; {file_in} -> {q2m_correction_ncdf} -> {file_out} |
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37 | ; |
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38 | ; } |
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39 | ; |
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40 | ; SEE ALSO |
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41 | ; ======== |
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42 | ; |
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43 | ; :ref:`project_profile.sh` |
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44 | ; |
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45 | ; :ref:`mooring_corrections` |
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46 | ; |
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47 | ; :ref:`d2m_to_q2m.pro` |
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48 | ; |
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49 | ; :func:`initncdf <saxo:initncdf>` |
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50 | ; :func:`read_ncdf <saxo:read_ncdf>` |
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51 | ; :func:`grossemoyenne <saxo:grossemoyenne>` |
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52 | ; :func:`julday <saxo:julday>` |
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53 | ; :func:`ncdf_quickwrite <saxo:ncdf_quickwrite>` |
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54 | ; |
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55 | ; EXAMPLES |
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56 | ; ======== |
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57 | ; |
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58 | ; :: |
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59 | ; |
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60 | ; IDL> q2m_correction_ncdf |
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61 | ; |
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62 | ; TODO |
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63 | ; ==== |
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64 | ; |
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65 | ; can be tested because d2m_to_q2m.pro pb |
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66 | ; |
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67 | ; coding rules |
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68 | ; |
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69 | ; EVOLUTIONS |
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70 | ; ========== |
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71 | ; |
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72 | ; - fplod 20110808T143129Z aedon.locean-ipsl.upmc.fr (Darwin) |
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73 | ; |
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74 | ; * usage of ${PROJECT_OD} |
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75 | ; * remove v20 in output filename |
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76 | ; |
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77 | ; - fplod 20101215T113945Z aedon.locean-ipsl.upmc.fr (Darwin) |
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78 | ; |
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79 | ; * add graph in header |
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80 | ; |
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81 | ; - fplod 20101214T093615Z aedon.locean-ipsl.upmc.fr (Darwin) |
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82 | ; |
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83 | ; * minimal header |
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84 | ; |
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85 | ; - pbk 2008 |
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86 | ; |
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87 | ; * creation |
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88 | ; |
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89 | ;- |
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90 | pro q2m_correction_ncdf |
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91 | ; |
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92 | @cm_4cal |
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93 | @cm_4data |
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94 | @cm_4mesh |
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95 | @cm_4data |
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96 | @cm_project |
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97 | ; |
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98 | ; |
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99 | ; test if ${PROJECT_OD} defined |
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100 | CASE project_od_env OF |
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101 | '' : BEGIN |
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102 | msg = 'eee : ${PROJECT_OD} is not defined' |
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103 | ras = report(msg) |
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104 | STOP |
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105 | END |
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106 | ELSE: BEGIN |
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107 | msg = 'iii : ${PROJECT_OD} is ' + project_od_env |
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108 | ras = report(msg) |
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109 | END |
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110 | ENDCASE |
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111 | ; |
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112 | ; check if output data will be possible |
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113 | iodirout = isadirectory(project_od_env) |
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114 | ; |
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115 | ; existence and protection for reading |
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116 | IF (FILE_TEST(iodirout, /DIRECTORY, /EXECUTABLE, /READ) EQ 0) THEN BEGIN |
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117 | msg = 'eee : the directory' + iodirout + ' is not accessible.' |
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118 | ras = report(msg) |
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119 | STOP |
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120 | ENDIF |
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121 | ; |
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122 | ; existence and protection for writing |
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123 | IF (FILE_TEST(iodirout, /DIRECTORY, /WRITE) EQ 0) THEN BEGIN |
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124 | msg = 'eee : the directory' + iodirout + ' was not found.' |
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125 | ras = report(msg) |
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126 | STOP |
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127 | ENDIF |
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128 | ; |
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129 | da1=19880101 & da2=20101231 |
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130 | ; |
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131 | ; build data filename |
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132 | filename='erai_q2m_19890101_20091231_oafluxgrid.nc' |
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133 | ; |
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134 | ; check if this file exists |
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135 | fullfilename = isafile(iodirout + filename, NEW=0, /MUST_EXIST) |
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136 | IF fullfilename[0] EQ '' THEN BEGIN |
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137 | msg = 'eee : the file ' + fullfilename + ' was not found.' |
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138 | ras = report(msg) |
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139 | STOP |
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140 | ENDIF |
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141 | ; |
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142 | ; build output filename |
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143 | filename_out = 'TropFlux_q2m_19890101_20091231.nc' |
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144 | fullfilename_out = iodirout + filename_out |
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145 | ; in order to avoid unexpected overwritten |
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146 | IF (FILE_TEST(fullfilename_out) EQ 1) THEN BEGIN |
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147 | msg = 'eee : the file ' + fullfilename_out + ' already exists.' |
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148 | ras = report(msg) |
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149 | STOP |
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150 | ENDIF |
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151 | ; |
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152 | initncdf, fullfilename |
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153 | q2m=read_ncdf('q2m',da1,da2,file=fullfilename,/nostr) |
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154 | help, q2m |
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155 | |
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156 | q2m_mean=grossemoyenne(q2m,'t',/nan) |
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157 | help, q2m_mean |
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158 | |
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159 | tt=time & jpt=n_elements(time) |
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160 | caldat, time,mon,day,yea |
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161 | q2m_m=q2m*0. |
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162 | |
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163 | for jt=0,jpt-1 do begin |
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164 | jtt=(time(jt)-julday(1,1,yea(jt))) < 364 |
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165 | q=reform(q2m_mean(*,*)) |
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166 | q2m_m(*,*,jt)=q |
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167 | endfor |
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168 | help, q2m_m |
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169 | |
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170 | q2m_ano=q2m-q2m_m |
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171 | |
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172 | ;; correction for mean based on scatter |
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173 | ;q2m_m=q2m_m+0.815445 ;; (2000-2008) |
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174 | q2m_m=q2m_m+0.792717 ;; (2000-2009) |
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175 | help, q2m_ano |
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176 | |
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177 | ;; applying the correction for variability based on the scatter |
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178 | ;q2m_ano=q2m_ano*(1/0.919333) ;; (2000-2008) |
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179 | q2m_ano=q2m_ano*(1/0.924674) ;; (2000-2009) |
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180 | |
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181 | q2m_new=q2m_m+q2m_ano |
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182 | help, q2m_new |
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183 | |
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184 | ;writing field |
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185 | lat=reform(gphit(0,0:jpj-1)) |
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186 | lon=reform(glamt(0:jpi-1,0)) |
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187 | time=timegen(7670, units='days', start=julday(1,1,1989,0)) & jpt=n_elements(time) |
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188 | |
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189 | cda0=string(jul2date(time(0)),format='(i8.8)') |
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190 | cda1=string(jul2date(time(jpt-1)),format='(i8.8)') |
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191 | |
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192 | time=time-julday(1,1,1950) & jpt=n_elements(time) |
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193 | |
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194 | ncfile='!' + fullfilename_out |
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195 | lon_attr={units:'degrees_east',long_name:'Longitude'} |
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196 | lat_attr={units:'degrees_north',long_name:'Latitude'} |
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197 | time_attr={units:'days since 1950-01-01 00:00:00',long_name:'Time axis',time_origin:'1950-JAN-01 00:00:00'} |
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198 | q2m_attr={units:'g/kg',missing_value:1.e20,long_name:'Specific humidity at 2m height',short_name:'q2m',axis:'TYX'} |
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199 | globattr={source:'Basic data obtained from ERAI. Mean correction for bias and correction for variability are applied',timerange:cda0+' - '+cda1} |
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200 | |
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201 | ncfields = 'q2m[longitude,latitude,time]=q2m_new:q2m_attr; ' $ |
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202 | + 'longitude[]=lon:lon_attr; ' $ |
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203 | + 'latitude[]=lat:lat_attr; ' $ |
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204 | + 'time[*time]=time:time_attr ' $ |
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205 | + ' @ globattr' |
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206 | |
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207 | @ncdf_quickwrite |
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208 | |
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209 | end |
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