1 | !> @file src/inifor_util.f90 |
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2 | !------------------------------------------------------------------------------! |
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3 | ! This file is part of the PALM model system. |
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4 | ! |
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5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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6 | ! terms of the GNU General Public License as published by the Free Software |
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7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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8 | ! version. |
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9 | ! |
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10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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13 | ! |
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14 | ! You should have received a copy of the GNU General Public License along with |
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15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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16 | ! |
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17 | ! Copyright 2017-2019 Leibniz Universitaet Hannover |
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18 | ! Copyright 2017-2019 Deutscher Wetterdienst Offenbach |
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19 | !------------------------------------------------------------------------------! |
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20 | ! |
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21 | ! Current revisions: |
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22 | ! ----------------- |
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23 | ! |
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24 | ! |
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25 | ! Former revisions: |
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26 | ! ----------------- |
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27 | ! $Id: inifor_util.f90 3785 2019-03-06 10:41:14Z pavelkrc $ |
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28 | ! Prefixed all INIFOR modules with inifor_ |
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29 | ! |
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30 | ! |
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31 | ! 3557 2018-11-22 16:01:22Z eckhard |
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32 | ! Updated documentation |
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33 | ! |
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34 | ! |
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35 | ! 3447 2018-10-29 15:52:54Z eckhard |
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36 | ! Renamed source files for compatibilty with PALM build system |
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37 | ! |
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38 | ! |
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39 | ! 3395 2018-10-22 17:32:49Z eckhard |
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40 | ! New routines for computing potential temperature and moist air density |
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41 | ! Increased number of digits in real-to-str conversion |
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42 | ! |
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43 | ! 3183 2018-07-27 14:25:55Z suehring |
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44 | ! Improved real-to-string conversion |
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45 | ! |
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46 | ! |
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47 | ! 3182 2018-07-27 13:36:03Z suehring |
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48 | ! Initial revision |
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49 | ! |
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50 | ! |
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51 | ! |
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52 | ! Authors: |
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53 | ! -------- |
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54 | !> @author Eckhard Kadasch (Deutscher Wetterdienst, Offenbach) |
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55 | ! |
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56 | ! Description: |
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57 | ! ------------ |
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58 | !> The util module provides miscellaneous utility routines for INIFOR. |
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59 | !------------------------------------------------------------------------------! |
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60 | #if defined ( __netcdf ) |
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61 | MODULE inifor_util |
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62 | |
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63 | USE inifor_defs, & |
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64 | ONLY : dp, PI, DATE, SNAME |
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65 | USE inifor_types, & |
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66 | ONLY : grid_definition |
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67 | USE, INTRINSIC :: ISO_C_BINDING, & |
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68 | ONLY : C_CHAR, C_INT, C_PTR, C_SIZE_T |
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69 | |
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70 | IMPLICIT NONE |
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71 | |
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72 | !------------------------------------------------------------------------------! |
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73 | ! Description: |
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74 | ! ------------ |
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75 | !> Fortran implementation of C's struct tm for representing points in time |
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76 | !------------------------------------------------------------------------------! |
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77 | TYPE, BIND(c) :: tm_struct |
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78 | INTEGER(C_INT) :: tm_sec !< seconds after the minute [0, 61] |
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79 | INTEGER(C_INT) :: tm_min !< minutes after the hour [0, 59] |
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80 | INTEGER(C_INT) :: tm_hour !< hours since midnight [0, 23] |
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81 | INTEGER(C_INT) :: tm_mday !< day of the month [1, 31] |
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82 | INTEGER(C_INT) :: tm_mon !< month since January [0, 11] |
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83 | INTEGER(C_INT) :: tm_year !< years since 1900 |
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84 | INTEGER(C_INT) :: tm_wday !< days since Sunday [0, 6] |
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85 | INTEGER(C_INT) :: tm_yday !< days since January 1st [0, 356] |
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86 | INTEGER(C_INT) :: tm_isdst !< Daylight Saving Time flag |
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87 | END TYPE |
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88 | |
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89 | INTERFACE |
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90 | |
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91 | !------------------------------------------------------------------------------! |
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92 | ! Description: |
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93 | ! ------------ |
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94 | !> Interface to C's strptime function, which converts a string to a tm |
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95 | !> structure. |
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96 | !------------------------------------------------------------------------------! |
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97 | FUNCTION strptime(string, format, timeinfo) BIND(c, NAME='strptime') |
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98 | IMPORT :: C_CHAR, C_SIZE_T, tm_struct |
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99 | |
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100 | IMPLICIT NONE |
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101 | |
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102 | CHARACTER(KIND=C_CHAR), DIMENSION(*), INTENT(IN) :: string, format |
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103 | TYPE(tm_struct), INTENT(OUT) :: timeinfo |
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104 | |
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105 | INTEGER(C_SIZE_T) :: strptime |
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106 | END FUNCTION |
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107 | |
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108 | |
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109 | !------------------------------------------------------------------------------! |
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110 | ! Description: |
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111 | ! ------------ |
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112 | !> Interface to C's strftime function, which converts the given 'timeinfo' |
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113 | !> structure to a string in the given 'format'. |
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114 | !------------------------------------------------------------------------------! |
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115 | FUNCTION strftime(string, string_len, format, timeinfo) BIND(c, NAME='strftime') |
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116 | IMPORT :: C_CHAR, C_SIZE_T, tm_struct |
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117 | |
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118 | IMPLICIT NONE |
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119 | |
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120 | CHARACTER(KIND=C_CHAR), DIMENSION(*), INTENT(OUT) :: string |
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121 | CHARACTER(KIND=C_CHAR), DIMENSION(*), INTENT(IN) :: format |
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122 | INTEGER(C_SIZE_T), INTENT(IN) :: string_len |
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123 | TYPE(tm_struct), INTENT(IN) :: timeinfo |
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124 | |
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125 | INTEGER(C_SIZE_T) :: strftime |
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126 | END FUNCTION |
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127 | |
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128 | |
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129 | !------------------------------------------------------------------------------! |
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130 | ! Description: |
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131 | ! ------------ |
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132 | !> Interface to C's mktime function, which converts the given tm structure to |
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133 | !> Unix time (number of seconds since 0 UTC, 1st January 1970). INIFOR uses the |
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134 | !> side effect that a call to mktime noramlizes the given 'timeinfo' structure, |
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135 | !> e.g. increments the date if hours overfow 24. |
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136 | !------------------------------------------------------------------------------! |
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137 | FUNCTION mktime(timeinfo) BIND(c, NAME='mktime') |
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138 | IMPORT :: C_PTR, tm_struct |
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139 | |
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140 | IMPLICIT NONE |
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141 | |
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142 | TYPE(tm_struct), INTENT(IN) :: timeinfo |
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143 | |
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144 | TYPE(C_PTR) :: mktime |
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145 | END FUNCTION |
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146 | |
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147 | END INTERFACE |
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148 | |
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149 | CONTAINS |
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150 | |
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151 | !------------------------------------------------------------------------------! |
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152 | ! Description: |
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153 | ! ------------ |
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154 | !> Takes a string of the form YYYYMMDDHH, adds the given number of hours to its |
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155 | !> tm structure representation, and returns the corresponding string in the same |
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156 | !> format |
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157 | !------------------------------------------------------------------------------! |
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158 | CHARACTER(LEN=DATE) FUNCTION add_hours_to(date_string, hours) |
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159 | CHARACTER(LEN=DATE), INTENT(IN) :: date_string |
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160 | INTEGER, INTENT(IN) :: hours |
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161 | |
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162 | CHARACTER(KIND=C_CHAR, LEN=*), PARAMETER :: format_string = "%Y%m%d%H" |
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163 | CHARACTER(KIND=C_CHAR, LEN=DATE) :: c_date_string |
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164 | TYPE(C_PTR) :: c_pointer |
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165 | TYPE(tm_struct) :: time_info |
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166 | INTEGER :: err |
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167 | |
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168 | c_date_string = date_string |
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169 | |
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170 | ! Convert C string to C tm struct |
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171 | CALL init_tm(time_info) |
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172 | err = strptime(c_date_string, format_string, time_info) |
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173 | |
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174 | ! Manipulate and normalize C tm struct |
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175 | time_info % tm_hour = time_info % tm_hour + hours |
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176 | c_pointer = mktime(time_info) |
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177 | |
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178 | ! Convert back to C string |
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179 | err = strftime(c_date_string, INT(DATE, KIND=C_SIZE_T), & |
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180 | format_string, time_info) |
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181 | |
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182 | add_hours_to = c_date_string |
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183 | END FUNCTION |
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184 | |
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185 | |
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186 | !------------------------------------------------------------------------------! |
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187 | ! Description: |
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188 | ! ------------ |
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189 | !> Print all members of the given tm structure |
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190 | !------------------------------------------------------------------------------! |
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191 | SUBROUTINE print_tm(timeinfo) |
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192 | TYPE(tm_struct), INTENT(IN) :: timeinfo |
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193 | |
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194 | PRINT *, "sec: ", timeinfo % tm_sec, & !< seconds after the minute [0, 61] |
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195 | "min: ", timeinfo % tm_min, & !< minutes after the hour [0, 59] |
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196 | "hr: ", timeinfo % tm_hour, & !< hours since midnight [0, 23] |
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197 | "day: ", timeinfo % tm_mday, & !< day of the month [1, 31] |
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198 | "mon: ", timeinfo % tm_mon, & !< month since January [0, 11] |
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199 | "yr: ", timeinfo % tm_year, & !< years since 1900 |
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200 | "wday:", timeinfo % tm_wday, & !< days since Sunday [0, 6] |
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201 | "yday:", timeinfo % tm_yday, & !< days since January 1st [0, 356] |
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202 | "dst: ", timeinfo % tm_isdst !< Daylight Saving time flag |
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203 | END SUBROUTINE print_tm |
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204 | |
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205 | |
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206 | !------------------------------------------------------------------------------! |
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207 | ! Description: |
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208 | ! ------------ |
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209 | !> Initialize the given tm structure with zero values |
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210 | !------------------------------------------------------------------------------! |
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211 | SUBROUTINE init_tm(timeinfo) |
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212 | TYPE(tm_struct), INTENT(INOUT) :: timeinfo |
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213 | |
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214 | timeinfo % tm_sec = 0 |
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215 | timeinfo % tm_min = 0 |
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216 | timeinfo % tm_hour = 0 |
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217 | timeinfo % tm_mday = 0 |
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218 | timeinfo % tm_mon = 0 |
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219 | timeinfo % tm_year = 0 |
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220 | timeinfo % tm_wday = 0 |
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221 | timeinfo % tm_yday = 0 |
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222 | |
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223 | ! We use UTC times, so marking Daylight Saving Time (DST) 'not available' |
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224 | ! (< 0). If this is set to 0, mktime will convert the timeinfo to DST and |
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225 | ! add one hour. |
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226 | timeinfo % tm_isdst = -1 |
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227 | END SUBROUTINE init_tm |
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228 | |
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229 | |
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230 | !------------------------------------------------------------------------------! |
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231 | ! Description: |
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232 | ! ------------ |
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233 | !> Fill the given array with values equally spaced between and including start |
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234 | !> and stop |
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235 | !------------------------------------------------------------------------------! |
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236 | SUBROUTINE linspace(start, stop, array) |
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237 | |
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238 | REAL(dp), INTENT(IN) :: start, stop |
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239 | REAL(dp), INTENT(INOUT) :: array(0:) |
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240 | INTEGER :: i, n |
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241 | |
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242 | n = UBOUND(array, 1) |
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243 | |
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244 | IF (n .EQ. 0) THEN |
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245 | |
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246 | array(0) = start |
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247 | |
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248 | ELSE |
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249 | |
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250 | DO i = 0, n |
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251 | array(i) = start + REAL(i, dp) / n * (stop - start) |
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252 | ENDDO |
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253 | |
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254 | ENDIF |
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255 | |
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256 | END SUBROUTINE linspace |
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257 | |
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258 | |
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259 | !------------------------------------------------------------------------------! |
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260 | ! Description: |
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261 | ! ------------ |
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262 | !> Reverse the order of the third (vertical) array dimension from top-down |
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263 | !> (COSMO) to bottom-up (PALM) |
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264 | !------------------------------------------------------------------------------! |
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265 | SUBROUTINE reverse(input_arr) |
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266 | |
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267 | REAL(dp), INTENT(INOUT) :: input_arr(:,:,:) |
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268 | |
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269 | input_arr = input_arr(:,:,size(input_arr, 3):1:-1) |
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270 | |
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271 | END SUBROUTINE reverse |
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272 | |
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273 | |
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274 | !------------------------------------------------------------------------------! |
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275 | ! Description: |
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276 | ! ------------ |
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277 | !> |
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278 | !------------------------------------------------------------------------------! |
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279 | SUBROUTINE deaverage(avg_1, t1, avg_2, t2, avg_3, t3) |
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280 | |
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281 | REAL(dp), DIMENSION(:,:,:), INTENT(IN) :: avg_1, avg_2 |
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282 | REAL(dp), INTENT(IN) :: t1, t2, t3 |
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283 | REAL(dp), DIMENSION(:,:,:), INTENT(OUT) :: avg_3 |
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284 | |
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285 | REAL(dp) :: ti |
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286 | |
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287 | ti = 1.0_dp / t3 |
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288 | |
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289 | avg_3(:,:,:) = ti * ( t2 * avg_2(:,:,:) - t1 * avg_1(:,:,:) ) |
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290 | |
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291 | END SUBROUTINE deaverage |
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292 | |
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293 | |
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294 | !------------------------------------------------------------------------------! |
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295 | ! Description: |
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296 | ! ------------ |
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297 | !> Compute the COSMO-DE/-D2 basic state pressure profile |
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298 | !------------------------------------------------------------------------------! |
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299 | SUBROUTINE get_basic_state(z, beta, p_sl, t_sl, rd, g, p0) |
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300 | |
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301 | REAL(dp), INTENT(IN) :: z(1:) !< height [m] |
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302 | REAL(dp), INTENT(IN) :: beta !< logarithmic lapse rate, dT / d ln(p) [K] |
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303 | REAL(dp), INTENT(IN) :: p_sl !< reference pressure [Pa] |
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304 | REAL(dp), INTENT(IN) :: t_sl !< reference tempereature [K] |
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305 | REAL(dp), INTENT(IN) :: rd !< ideal gas constant of dry air [J/kg/K] |
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306 | REAL(dp), INTENT(IN) :: g !< acceleration of Earth's gravity [m/s^2] |
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307 | REAL(dp), INTENT(OUT) :: p0(1:) !< COSMO basic state pressure [Pa] |
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308 | REAL(dp) :: root_frac, factor !< precomputed factors |
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309 | |
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310 | factor = - t_sl / beta |
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311 | root_frac = (2.0_dp * beta * g) / (rd * t_sl*t_sl) |
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312 | |
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313 | p0(:) = p_sl * EXP( & |
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314 | factor * ( 1.0_dp - SQRT( 1.0_dp - root_frac * z(:) ) ) & |
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315 | ) |
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316 | |
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317 | END SUBROUTINE get_basic_state |
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318 | |
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319 | |
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320 | !------------------------------------------------------------------------------! |
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321 | ! Description: |
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322 | ! ------------ |
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323 | !> Converts the absolute temperature to the potential temperature in place using |
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324 | !> the identity a^b = e^(b ln(a)). |
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325 | !> |
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326 | !> theta = T * (p_ref/p)^(R/c_p) = T * e^( R/c_p * ln(p_ref/p) ) |
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327 | !------------------------------------------------------------------------------! |
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328 | SUBROUTINE potential_temperature(t, p, p_ref, r, cp) |
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329 | REAL(dp), DIMENSION(:,:,:), INTENT(INOUT) :: t |
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330 | REAL(dp), DIMENSION(:,:,:), INTENT(IN) :: p |
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331 | REAL(dp), INTENT(IN) :: p_ref, r, cp |
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332 | REAL(dp) :: rcp |
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333 | |
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334 | rcp = r/cp |
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335 | t(:,:,:) = t(:,:,:) * EXP( rcp * LOG(p_ref / p(:,:,:)) ) |
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336 | |
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337 | END SUBROUTINE potential_temperature |
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338 | |
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339 | |
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340 | !------------------------------------------------------------------------------! |
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341 | ! Description: |
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342 | ! ------------ |
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343 | !> Compute the density in place of the given temperature (t_rho). |
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344 | !------------------------------------------------------------------------------! |
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345 | SUBROUTINE moist_density(t_rho, p, qv, rd, rv) |
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346 | REAL(dp), DIMENSION(:,:,:), INTENT(INOUT) :: t_rho |
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347 | REAL(dp), DIMENSION(:,:,:), INTENT(IN) :: p, qv |
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348 | REAL(dp), INTENT(IN) :: rd, rv |
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349 | |
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350 | t_rho(:,:,:) = p(:,:,:) / ( & |
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351 | (rv * qv(:,:,:) + rd * (1.0_dp - qv(:,:,:))) * t_rho(:,:,:) & |
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352 | ) |
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353 | |
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354 | END SUBROUTINE moist_density |
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355 | |
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356 | |
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357 | ! Convert a real number to a string in scientific notation |
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358 | ! showing four significant digits. |
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359 | CHARACTER(LEN=SNAME) FUNCTION real_to_str(val, format) |
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360 | |
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361 | REAL(dp), INTENT(IN) :: val |
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362 | CHARACTER(LEN=*), OPTIONAL, INTENT(IN) :: format |
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363 | |
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364 | IF (PRESENT(format)) THEN |
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365 | WRITE(real_to_str, format) val |
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366 | ELSE |
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367 | WRITE(real_to_str, '(E11.4)') val |
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368 | ENDIF |
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369 | real_to_str = ADJUSTL(real_to_str) |
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370 | |
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371 | END FUNCTION real_to_str |
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372 | |
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373 | |
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374 | !------------------------------------------------------------------------------! |
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375 | ! Description: |
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376 | ! ------------ |
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377 | !> Converts the given real value to a string |
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378 | !------------------------------------------------------------------------------! |
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379 | CHARACTER(LEN=16) FUNCTION real_to_str_f(val) |
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380 | |
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381 | REAL(dp), INTENT(IN) :: val |
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382 | |
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383 | WRITE(real_to_str_f, '(F16.8)') val |
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384 | real_to_str_f = ADJUSTL(real_to_str_f) |
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385 | |
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386 | END FUNCTION real_to_str_f |
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387 | |
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388 | |
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389 | !------------------------------------------------------------------------------! |
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390 | ! Description: |
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391 | ! ------------ |
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392 | !> Converts the given integer value to a string |
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393 | !------------------------------------------------------------------------------! |
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394 | CHARACTER(LEN=10) FUNCTION str(val) |
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395 | |
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396 | INTEGER, INTENT(IN) :: val |
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397 | |
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398 | WRITE(str, '(i10)') val |
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399 | str = ADJUSTL(str) |
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400 | |
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401 | END FUNCTION str |
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402 | |
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403 | |
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404 | !------------------------------------------------------------------------------! |
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405 | ! Description: |
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406 | ! ------------ |
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407 | !> If the given path is not conlcuded by a slash, add one. |
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408 | !------------------------------------------------------------------------------! |
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409 | SUBROUTINE normalize_path(path) |
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410 | |
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411 | CHARACTER(LEN=*), INTENT(INOUT) :: path |
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412 | INTEGER :: n |
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413 | |
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414 | n = LEN_TRIM(path) |
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415 | |
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416 | IF (path(n:n) .NE. '/') THEN |
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417 | path = TRIM(path) // '/' |
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418 | ENDIF |
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419 | |
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420 | END SUBROUTINE |
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421 | |
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422 | END MODULE inifor_util |
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423 | #endif |
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424 | |
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