1 | ;+ |
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2 | ; |
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3 | ; .. _sst_correction_ncdf.pro: |
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4 | ; |
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5 | ; ======================= |
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6 | ; sst_correction_ncdf.pro |
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7 | ; ======================= |
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8 | ; |
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9 | ; Correction of sst on OAFLUX grid |
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10 | ; |
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11 | ; :file:`${PROJECT_OD}/erai_sst_19890101_20091231_oafluxgrid.nc` have been |
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12 | ; produced by :ref:`interp_erai_sst_1989_2009.pro`. |
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13 | ; |
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14 | ; Corrected sst on OAFLUX grid is written in |
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15 | ; :file:`${PROJECT_OD}/TropFlux_sst_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:`cronin_gustiness_ncdf.pro` and |
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19 | ; :ref:`TropFlux_19890101_20091231.pro`. |
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20 | ; |
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21 | ; .. graphviz:: |
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22 | ; |
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23 | ; digraph sst_correction_ncdf { |
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24 | ; graph [ |
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25 | ; rankdir="LR", |
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26 | ; ] |
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27 | ; |
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28 | ; file_in [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/erai_sst_19890101_20091231_oafluxgrid.nc"]; |
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29 | ; file_out [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/TropFlux_sst_19890101_20091231.nc"]; |
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30 | ; |
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31 | ; sst_correction_ncdf [shape=box, |
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32 | ; fontname=Courier, |
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33 | ; color=blue, |
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34 | ; URL="http://forge.ipsl.jussieu.fr/tropflux/browser/trunk/src/sst_correction_ncdf.pro", |
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35 | ; label="${PROJECT}/src/sst_correction_ncdf.pro"]; |
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36 | ; |
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37 | ; {file_in} -> {sst_correction_ncdf} -> {file_out} |
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38 | ; |
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39 | ; } |
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40 | ; |
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41 | ; |
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42 | ; SEE ALSO |
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43 | ; ======== |
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44 | ; |
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45 | ; :ref:`project_profile.sh` |
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46 | ; |
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47 | ; :ref:`mooring_corrections` |
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48 | ; |
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49 | ; :ref:`interp_erai_sst_1989_2009.pro` |
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50 | ; |
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51 | ; :func:`initncdf <saxo:initncdf>` |
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52 | ; :func:`read_ncdf <saxo:read_ncdf>` |
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53 | ; :func:`grossemoyenne <saxo:grossemoyenne>` |
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54 | ; :func:`julday <saxo:julday>` |
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55 | ; :func:`ncdf_quickwrite <saxo:ncdf_quickwrite>` |
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56 | ; |
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57 | ; EXAMPLES |
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58 | ; ======== |
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59 | ; |
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60 | ; :: |
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61 | ; |
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62 | ; IDL> sst_correction_ncdf |
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63 | ; |
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64 | ; TODO |
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65 | ; ==== |
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66 | ; |
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67 | ; very strange value of time on lohlot1 idl6 but not always and not always at the same indices !!:: |
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68 | ; |
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69 | ; print, time[7080:7090] |
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70 | ; 2454607.5 2454608.5 2454609.5 9.9692100e+36 9.9692100e+36 |
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71 | ; 9.9692100e+36 9.9692100e+36 9.9692100e+36 9.9692100e+36 2454616.5 |
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72 | ; 2454617.5 |
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73 | ; |
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74 | ; while :: |
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75 | ; |
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76 | ; $ ncks -H -C -v time -d time,7080,7090 ${PROJECT_ID}/20c3m_erai_sstk_TROP_1989_2009.nc |
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77 | ; time[7080]=450432 |
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78 | ; time[7081]=450456 |
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79 | ; time[7082]=450480 |
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80 | ; time[7083]=450504 |
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81 | ; time[7084]=450528 |
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82 | ; time[7085]=450552 |
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83 | ; time[7086]=450576 |
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84 | ; time[7087]=450600 |
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85 | ; time[7088]=450624 |
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86 | ; time[7089]=450648 |
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87 | ; time[7090]=450672 |
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88 | ; |
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89 | ; and |
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90 | ; ncks -H -C -v time -d time,7080,7090 ${PROJECT_OD}/erai_sst_19890101_20091231_oafluxgrid.nc |
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91 | ; time[7080]=21325 |
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92 | ; time[7081]=21326 |
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93 | ; time[7082]=21327 |
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94 | ; time[7083]=9.96920996839e+36 |
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95 | ; time[7084]=9.96920996839e+36 |
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96 | ; time[7085]=9.96920996839e+36 |
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97 | ; time[7086]=9.96920996839e+36 |
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98 | ; time[7087]=9.96920996839e+36 |
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99 | ; time[7088]=9.96920996839e+36 |
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100 | ; time[7089]=21334 |
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101 | ; time[7090]=21335 |
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102 | ; |
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103 | ; and :: |
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104 | ; |
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105 | ; fplod@cratos$ ncks -H -C -v time -d time,7080,7090 ${PROJECT_OD}/erai_sst_19890101_20091231_oafluxgrid.nc |
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106 | ; time[7080]=21325 |
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107 | ; time[7081]=21326 |
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108 | ; time[7082]=21327 |
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109 | ; time[7083]=21328 |
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110 | ; time[7084]=21329 |
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111 | ; time[7085]=21330 |
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112 | ; time[7086]=21331 |
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113 | ; time[7087]=21332 |
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114 | ; time[7088]=21333 |
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115 | ; time[7089]=21334 |
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116 | ; time[7090]=21335 |
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117 | |
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118 | ; coding rules |
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119 | ; |
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120 | ; temperature SI units = K : why + and - 273... |
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121 | ; |
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122 | ; hard coded coefficient correction. |
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123 | ; |
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124 | ; KNOWN ISSUES |
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125 | ; ============ |
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126 | ; |
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127 | ; test of existence of fullfilename_in not very efficient because |
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128 | ; MUST_EXIST keyword of :func:`isafile <saxo:isafile>` not yet implemented |
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129 | ; |
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130 | ; EVOLUTIONS |
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131 | ; ========== |
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132 | ; |
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133 | ; - fplod 20110808T124236Z cratos (Linux) |
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134 | ; |
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135 | ; * usage of ${PROJECT_OD} |
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136 | ; * complete description |
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137 | ; * remove v20 in output filename |
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138 | ; |
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139 | ; - fplod 20101215T114224Z aedon.locean-ipsl.upmc.fr (Darwin) |
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140 | ; |
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141 | ; * add graph in header |
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142 | ; |
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143 | ; - fplod 20101214T093615Z aedon.locean-ipsl.upmc.fr (Darwin) |
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144 | ; |
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145 | ; * minimal header |
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146 | ; |
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147 | ; - pbk 2008 |
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148 | ; |
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149 | ; * creation |
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150 | ; |
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151 | ;- |
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152 | pro sst_correction_ncdf |
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153 | ; |
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154 | @cm_4cal |
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155 | @cm_4data |
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156 | @cm_4mesh |
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157 | @cm_4data |
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158 | @cm_project |
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159 | ; |
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160 | ; test if ${PROJECT_OD} defined |
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161 | CASE project_od_env OF |
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162 | '' : BEGIN |
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163 | msg = 'eee : ${PROJECT_OD} is not defined' |
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164 | ras = report(msg) |
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165 | STOP |
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166 | END |
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167 | ELSE: BEGIN |
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168 | msg = 'iii : ${PROJECT_OD} is ' + project_od_env |
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169 | ras = report(msg) |
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170 | END |
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171 | ENDCASE |
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172 | ; |
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173 | ; check if output data will be possible |
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174 | iodirout = isadirectory(project_od_env) |
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175 | ; |
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176 | ; existence and protection for reading |
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177 | IF (FILE_TEST(iodirout, /DIRECTORY, /EXECUTABLE, /READ) EQ 0) THEN BEGIN |
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178 | msg = 'eee : the directory' + iodirout + ' is not accessible.' |
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179 | ras = report(msg) |
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180 | STOP |
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181 | ENDIF |
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182 | ; |
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183 | ; existence and protection for writing |
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184 | IF (FILE_TEST(iodirout, /DIRECTORY, /WRITE) EQ 0) THEN BEGIN |
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185 | msg = 'eee : the directory' + iodirout + ' was not found.' |
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186 | ras = report(msg) |
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187 | STOP |
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188 | ENDIF |
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189 | ; |
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190 | da1=19880101 & da2=20091231 |
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191 | ; |
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192 | ; build data filename |
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193 | filename='erai_sst_19890101_20091231_oafluxgrid.nc' |
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194 | ; |
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195 | ; check if this file exists |
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196 | fullfilename = isafile(iodirout + filename, NEW=0, /MUST_EXIST) |
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197 | IF fullfilename[0] EQ '' THEN BEGIN |
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198 | msg = 'eee : the file ' + fullfilename + ' was not found.' |
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199 | ras = report(msg) |
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200 | STOP |
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201 | ENDIF |
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202 | ; |
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203 | ; build output filename |
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204 | filename_out = 'TropFlux_sst_19890101_20091231.nc' |
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205 | fullfilename_out = iodirout + filename_out |
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206 | ; in order to avoid unexpected overwritten |
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207 | IF (FILE_TEST(fullfilename_out) EQ 1) THEN BEGIN |
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208 | msg = 'eee : the file ' + fullfilename_out + ' already exists.' |
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209 | ras = report(msg) |
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210 | STOP |
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211 | ENDIF |
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212 | ; |
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213 | initncdf, fullfilename |
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214 | sst=read_ncdf('sst',da1,da2,file=fullfilename,/nostr) & sst=sst-273.15 |
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215 | help, sst |
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216 | |
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217 | sst_mean=grossemoyenne(sst,'t',/nan) |
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218 | help, sst_mean |
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219 | |
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220 | tt=time & jpt=n_elements(time) |
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221 | caldat, time,mon,day,yea |
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222 | ; |
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223 | ; debug to understand some time value 9.9692100e+36 on idl 6 lohloht1 |
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224 | print, time[7080:7090] |
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225 | ; |
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226 | sst_m=sst*0. |
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227 | |
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228 | for jt=0,jpt-1 do begin |
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229 | jtt=(time(jt)-julday(1,1,yea(jt))) < 364 |
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230 | t=reform(sst_mean(*,*)) |
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231 | sst_m(*,*,jt)=t |
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232 | endfor |
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233 | help, sst_m |
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234 | |
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235 | sst_ano=sst-sst_m |
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236 | |
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237 | ;; correction for mean based on scatter |
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238 | ;sst_m=sst_m+0.0521111 ;; (2000-2008) |
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239 | sst_m=sst_m+0.0533692 ;; (2000-2009) |
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240 | |
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241 | help, sst_ano |
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242 | |
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243 | ;; applying the correction for varyability based on the scatter |
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244 | ;sst_ano=sst_ano*(1/0.989889) ;; (2000-2008) |
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245 | sst_ano=sst_ano*(1/0.986196) ;; (2000-2009) |
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246 | |
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247 | sst_new=sst_m+sst_ano+273.15 |
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248 | help, sst_new |
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249 | |
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250 | ;writing field |
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251 | lat=reform(gphit(0,0:jpj-1)) |
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252 | lon=reform(glamt(0:jpi-1,0)) |
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253 | time=timegen(7670, units='days', start=julday(1,1,1989)) & jpt=n_elements(time) |
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254 | |
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255 | cda0=string(jul2date(time(0)),format='(i8.8)') |
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256 | cda1=string(jul2date(time(jpt-1)),format='(i8.8)') |
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257 | |
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258 | time=time-julday(1,1,1950) & jpt=n_elements(time) |
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259 | |
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260 | ncfile='!' + fullfilename_out |
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261 | lon_attr={units:'degrees_east',long_name:'Longitude'} |
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262 | lat_attr={units:'degrees_north',long_name:'Latitude'} |
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263 | 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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264 | sst_attr={units:'degK',missing_value:1.e20,long_name:'Sea Surface Temperature',short_name:'sst',axis:'TYX'} |
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265 | globattr={source:'Basic data obtained from ERAI. Bias and variability correction are applied',timerange:cda0+' - '+cda1} |
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266 | |
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267 | ncfields = 'sst[longitude,latitude,time]=sst_new:sst_attr; ' $ |
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268 | + 'longitude[]=lon:lon_attr; ' $ |
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269 | + 'latitude[]=lat:lat_attr; ' $ |
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270 | + 'time[*time]=time:time_attr ' $ |
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271 | + ' @ globattr' |
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272 | |
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273 | @ncdf_quickwrite |
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274 | |
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275 | end |
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