[6] | 1 | ;+ |
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| 2 | ; |
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| 3 | ; .. _d2m_to_q2m_erai.pro: |
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| 4 | ; |
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| 5 | ; =================== |
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| 6 | ; d2m_to_q2m_erai.pro |
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| 7 | ; =================== |
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| 8 | ; |
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[77] | 9 | ; Conversion of d2m to q2m on OAFLUX grid |
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[72] | 10 | ; |
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[92] | 11 | ; :file:`${PROJECT_OD}/erai_d2m_19890101_20091231_oafluxgrid.nc` |
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| 12 | ; containing |
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| 13 | ; ++ |
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| 14 | ; has been produced by |
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| 15 | ; :ref:`interp_erai_dewt_1989_2009.pro`. |
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[72] | 16 | ; |
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[92] | 17 | ; :file:`${PROJECT_OD}/erai_t2m_19890101_20091231_oafluxgrid.nc` |
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| 18 | ; containing |
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| 19 | ; ++ |
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| 20 | ; has been produced by |
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| 21 | ; :ref:`interp_erai_t2m_1989_2009.pro`. |
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[72] | 22 | ; |
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[92] | 23 | ; :file:`${PROJECT_OD}/erai_msl_19890101_20091231_oafluxgrid.nc` |
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| 24 | ; containing |
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| 25 | ; ++ |
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| 26 | ; has been |
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[100] | 27 | ; produced by |
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| 28 | ; :ref:`interp_erai_msl_1989_2009.pro`. |
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[72] | 29 | ; |
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[92] | 30 | ; q2m on OAFLUX grid |
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| 31 | ; is written in |
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[80] | 32 | ; :file:`${PROJECT_OD}/erai_q2m_19890101_20091231_oafluxgrid.nc` |
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[72] | 33 | ; if this file not already exists. |
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| 34 | ; |
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[92] | 35 | ; This file |
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| 36 | ; :file:`${PROJECT_OD}/erai_q2m_19890101_20091231_oafluxgrid.nc` |
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[100] | 37 | ; will be used by |
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| 38 | ; :ref:`q2m_correction_ncdf.pro`. |
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[72] | 39 | ; |
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[92] | 40 | ; .. only:: man |
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| 41 | ; |
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| 42 | ; Figure is visible on PDF and HTML documents only. |
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| 43 | ; |
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| 44 | ; .. only:: html or latex |
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| 45 | ; |
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[8] | 46 | ; .. graphviz:: |
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| 47 | ; |
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| 48 | ; digraph d2m_to_q2m_erai { |
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| 49 | ; |
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[72] | 50 | ; file_d2m [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/erai_d2m_19890101_20091231_oafluxgrid.nc"]; |
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| 51 | ; file_t2m [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/erai_t2m_19890101_20091231_oafluxgrid.nc"]; |
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| 52 | ; file_msl [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/erai_msl_19890101_20091231_oafluxgrid.nc"]; |
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[80] | 53 | ; file_q2m [shape=ellipse,fontname=Courier,label="${PROJECT_OD}/erai_q2m_19890101_20091231_oafluxgrid.nc"]; |
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[72] | 54 | ; |
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[8] | 55 | ; d2m_to_q2m_erai [shape=box, |
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| 56 | ; fontname=Courier, |
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| 57 | ; color=blue, |
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| 58 | ; URL="http://forge.ipsl.jussieu.fr/tropflux/browser/trunk/src/d2m_to_q2m_erai.pro", |
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[50] | 59 | ; label="${PROJECT}/src/d2m_to_q2m_erai.pro"]; |
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[72] | 60 | ; |
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[12] | 61 | ; {file_d2m file_t2m file_msl} -> {d2m_to_q2m_erai} -> {file_q2m} |
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[100] | 62 | ; |
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[8] | 63 | ; } |
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| 64 | ; |
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[6] | 65 | ; SEE ALSO |
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| 66 | ; ======== |
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| 67 | ; |
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[92] | 68 | ; :ref:`mooring_corrections` |
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| 69 | ; |
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[80] | 70 | ; [Gill:AP:1982]_ |
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| 71 | ; |
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| 72 | ; [AOMIP]_ |
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| 73 | ; |
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[72] | 74 | ; :ref:`project_profile.sh` |
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| 75 | ; |
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| 76 | ; :ref:`interp_erai_dewt_1989_2009.pro` |
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[77] | 77 | ; :ref:`interp_erai_msl_1989_2009.pro` |
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[72] | 78 | ; :ref:`interp_erai_t2m_1989_2009.pro` |
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| 79 | ; |
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[77] | 80 | ; :ref:`q2m_correction_ncdf.pro` |
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[72] | 81 | ; |
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[12] | 82 | ; :func:`rh_to_spechum` |
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[20] | 83 | ; :func:`initncdf <saxo:initncdf>` |
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| 84 | ; :func:`read_ncdf <saxo:read_ncdf>` |
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| 85 | ; :func:`julday <saxo:julday>` |
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| 86 | ; :func:`ncdf_quickwrite <saxo:ncdf_quickwrite>` |
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[7] | 87 | ; |
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[6] | 88 | ; EXAMPLES |
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| 89 | ; ======== |
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| 90 | ; |
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| 91 | ; :: |
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| 92 | ; |
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| 93 | ; IDL> d2m_to_q2m_erai |
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| 94 | ; |
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| 95 | ; TODO |
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| 96 | ; ==== |
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| 97 | ; |
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[80] | 98 | ; pb on cratos idl7 even if output file is written:: |
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[72] | 99 | ; |
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[80] | 100 | ; % Program caused arithmetic error: Floating overflow |
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| 101 | ; % Program caused arithmetic error: Floating illegal operand |
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| 102 | ; |
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| 103 | ; related to occurence of NaNf in ncdump output ? do no yet |
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| 104 | ; |
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| 105 | ; pk also see these error messages ... |
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| 106 | ; |
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| 107 | ; check for NaN value in P return by reading Netcdf msl file |
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| 108 | ; solution is may be to apply *mskout to q2m like in interp* tools |
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| 109 | ; not yet done to keep close as possible to pk processing |
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| 110 | ; |
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[6] | 111 | ; coding rules |
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| 112 | ; |
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| 113 | ; EVOLUTIONS |
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| 114 | ; ========== |
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| 115 | ; |
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[77] | 116 | ; $Id$ |
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[92] | 117 | ; |
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[77] | 118 | ; $URL$ |
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| 119 | ; |
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[80] | 120 | ; - fplod 20110811T114932Z aedon.locean-ipsl.upmc.fr (Darwin) |
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| 121 | ; |
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| 122 | ; * add es0 value |
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| 123 | ; * add reference |
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| 124 | ; * replace q2m_erai by erai_q2m in output filename |
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| 125 | ; |
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[77] | 126 | ; - fplod 20110809T154249Z aedon.locean-ipsl.upmc.fr (Darwin) |
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| 127 | ; |
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| 128 | ; * typo |
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| 129 | ; |
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[72] | 130 | ; - fplod 20110808T120234Z cratos (Linux) |
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| 131 | ; |
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| 132 | ; * usage of ${PROJECT_OD} |
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| 133 | ; * complete description |
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| 134 | ; * remove return statement |
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| 135 | ; |
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[12] | 136 | ; - fplod 20101215T162933Z aedon.locean-ipsl.upmc.fr (Darwin) |
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| 137 | ; |
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| 138 | ; * graph correction |
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| 139 | ; |
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[8] | 140 | ; - fplod 20101215T093141Z aedon.locean-ipsl.upmc.fr (Darwin) |
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| 141 | ; |
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| 142 | ; * add graph in header |
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| 143 | ; |
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[6] | 144 | ; - fplod 20101214T093615Z aedon.locean-ipsl.upmc.fr (Darwin) |
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| 145 | ; |
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| 146 | ; * minimal header |
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| 147 | ; |
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| 148 | ; - pbk 2008 |
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| 149 | ; |
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| 150 | ; * creation |
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| 151 | ; |
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| 152 | ;- |
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[5] | 153 | pro d2m_to_q2m_erai |
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[72] | 154 | ; |
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| 155 | @cm_4cal |
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| 156 | @cm_4data |
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| 157 | @cm_4mesh |
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| 158 | @cm_4data |
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| 159 | @cm_project |
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| 160 | ; |
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| 161 | ; test if ${PROJECT_OD} defined |
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| 162 | CASE project_od_env OF |
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| 163 | '' : BEGIN |
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| 164 | msg = 'eee : ${PROJECT_OD} is not defined' |
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| 165 | ras = report(msg) |
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| 166 | STOP |
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| 167 | END |
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| 168 | ELSE: BEGIN |
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| 169 | msg = 'iii : ${PROJECT_OD} is ' + project_od_env |
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| 170 | ras = report(msg) |
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| 171 | END |
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| 172 | ENDCASE |
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| 173 | ; |
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| 174 | ; check if output data will be possible |
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| 175 | iodirout = isadirectory(project_od_env) |
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| 176 | ; |
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| 177 | ; existence and protection for reading |
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| 178 | IF (FILE_TEST(iodirout, /DIRECTORY, /EXECUTABLE, /READ) EQ 0) THEN BEGIN |
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| 179 | msg = 'eee : the directory' + iodirout + ' is not accessible.' |
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| 180 | ras = report(msg) |
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| 181 | STOP |
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| 182 | ENDIF |
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| 183 | ; |
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| 184 | ; existence and protection for writing |
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| 185 | IF (FILE_TEST(iodirout, /DIRECTORY, /WRITE) EQ 0) THEN BEGIN |
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| 186 | msg = 'eee : the directory' + iodirout + ' was not found.' |
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| 187 | ras = report(msg) |
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| 188 | STOP |
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| 189 | ENDIF |
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| 190 | ; |
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[97] | 191 | d1=19881001 |
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[94] | 192 | d2=20101231 |
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[72] | 193 | ; |
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| 194 | ; build d2m filename |
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| 195 | filename_d2m='erai_d2m_19890101_20091231_oafluxgrid.nc' |
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| 196 | ; |
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| 197 | ; check if this file exists |
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[92] | 198 | msg='iii : looking for ' + filename_d2m |
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| 199 | ras = report(msg) |
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[72] | 200 | fullfilename_d2m = isafile(iodirout + filename_d2m, NEW=0, /MUST_EXIST) |
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| 201 | IF fullfilename_d2m[0] EQ '' THEN BEGIN |
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| 202 | msg = 'eee : the file ' + fullfilename_d2m + ' was not found.' |
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| 203 | ras = report(msg) |
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| 204 | STOP |
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| 205 | ENDIF |
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| 206 | ; |
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| 207 | ; build t2m filename |
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| 208 | filename_t2m='erai_t2m_19890101_20091231_oafluxgrid.nc' |
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| 209 | ; |
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| 210 | ; check if this file exists |
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[92] | 211 | msg='iii : looking for ' + filename_t2m |
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| 212 | ras = report(msg) |
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[72] | 213 | fullfilename_t2m = isafile(iodirout + filename_t2m, NEW=0, /MUST_EXIST) |
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| 214 | IF fullfilename_t2m[0] EQ '' THEN BEGIN |
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| 215 | msg = 'eee : the file ' + fullfilename_t2m + ' was not found.' |
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| 216 | ras = report(msg) |
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| 217 | STOP |
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| 218 | ENDIF |
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| 219 | ; |
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| 220 | ; build msl filename |
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| 221 | filename_msl='erai_msl_19890101_20091231_oafluxgrid.nc' |
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| 222 | ; |
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| 223 | ; check if this file exists |
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[92] | 224 | msg='iii : looking for ' + filename_msl |
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| 225 | ras = report(msg) |
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[72] | 226 | fullfilename_msl = isafile(iodirout + filename_msl, NEW=0, /MUST_EXIST) |
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| 227 | IF fullfilename_msl[0] EQ '' THEN BEGIN |
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| 228 | msg = 'eee : the file ' + fullfilename_msl + ' was not found.' |
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| 229 | ras = report(msg) |
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| 230 | STOP |
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| 231 | ENDIF |
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| 232 | ; |
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| 233 | ; build output filename |
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[80] | 234 | filename_out = 'erai_q2m_19890101_20091231_oafluxgrid.nc' |
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[72] | 235 | fullfilename_out = iodirout + filename_out |
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| 236 | ; in order to avoid unexpected overwritten |
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| 237 | IF (FILE_TEST(fullfilename_out) EQ 1) THEN BEGIN |
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| 238 | msg = 'eee : the file ' + fullfilename_out + ' already exists.' |
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| 239 | ras = report(msg) |
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| 240 | STOP |
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| 241 | ENDIF |
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| 242 | ; |
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| 243 | ; reading erai dew point temperature |
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| 244 | initncdf, fullfilename_d2m |
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| 245 | td=read_ncdf("d2m", d1,d2, file=fullfilename_d2m,/nostr) |
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[97] | 246 | ; |
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[72] | 247 | ; reading erai air temperature |
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| 248 | initncdf, fullfilename_t2m |
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| 249 | t=read_ncdf("t2m", d1,d2, file=fullfilename_t2m,/nostr) |
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[94] | 250 | jpt=n_elements(time) |
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[5] | 251 | help, t, td |
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[97] | 252 | ; |
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[80] | 253 | ;since the t2m and d2m are already in K, no need for conversion |
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| 254 | es0=6.11 |
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[5] | 255 | e=es0*exp((25.e5/461.5)*((1/273.15)-(1/td))) |
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| 256 | es=es0*exp((25.e5/461.5)*((1/273.15)-(1/t))) |
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[97] | 257 | ; |
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[5] | 258 | rh=(e/es)*100 |
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[97] | 259 | ; |
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| 260 | ; conversion of relative humidity to sp. humidity |
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| 261 | ; Ref.1 - Gill, Appendix 4, |
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| 262 | ; Ref.2 - http://efdl.cims.nyu.edu/project_aomip/forcing_data/atmosphere/humidity.html |
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| 263 | ; |
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[5] | 264 | t=t-273.15 |
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[97] | 265 | ; |
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[72] | 266 | initncdf, fullfilename_msl |
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| 267 | P=read_ncdf("msl", d1, d2, file=fullfilename_msl,/nostr) |
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[5] | 268 | help, P |
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[92] | 269 | ; ++ for debug ftp error |
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[80] | 270 | ; ++print,P(0:1,0,0) |
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| 271 | ; ++stop |
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[5] | 272 | q2m=rh_to_spechum(rh,t,P) |
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[97] | 273 | ; |
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[72] | 274 | ;writing field |
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| 275 | ncfile='!' + fullfilename_out |
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[100] | 276 | time=timegen(7670, start=julday(1,1,1989,0), units='days') |
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[94] | 277 | jpt=n_elements(time) |
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[5] | 278 | cda0=string(jul2date(time(0)),format='(i8.8)') |
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| 279 | cda1=string(jul2date(time(jpt-1)),format='(i8.8)') |
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[97] | 280 | ; |
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[98] | 281 | time=time-julday(1,1,1950,00,00,00) |
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[97] | 282 | xlon=reform(glamt(*,0) ) |
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[94] | 283 | ylat=reform(gphit(0,*)) |
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[5] | 284 | valmask=1.e20 |
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[97] | 285 | ; |
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[5] | 286 | lon_attr={units:'degrees_east',long_name:'Longitude'} |
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| 287 | lat_attr={units:'degrees_north',long_name:'Latitude'} |
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| 288 | q2m_attr={units:'kg/kg',missing_value:valmask,long_name:'Surface specific humidity at 2m ',short_name:'q2m',axis:'TYX'} |
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[100] | 289 | 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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[5] | 290 | globattr={source:'Surface specific humidity at 2m calculated from dew point temperature',timerange:cda0+' - '+cda1} |
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[97] | 291 | ; |
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[93] | 292 | ncfields = 'q2m[longitude,latitude,time]=q2m:q2m_attr; ' $ |
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[5] | 293 | + 'longitude[]=xlon:lon_attr; ' $ |
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| 294 | + 'latitude[]=ylat:lat_attr; ' $ |
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[98] | 295 | + 'time[*time]=time:time_attr ' $ |
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[5] | 296 | + ' @ globattr' |
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[97] | 297 | ; |
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[5] | 298 | @ncdf_quickwrite |
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[97] | 299 | ; |
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[5] | 300 | end |
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