[3447] | 1 | !> @file src/inifor_util.f90 |
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[2696] | 2 | !------------------------------------------------------------------------------! |
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[2718] | 3 | ! This file is part of the PALM model system. |
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[2696] | 4 | ! |
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[2718] | 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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[2696] | 8 | ! version. |
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| 9 | ! |
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[2718] | 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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[2696] | 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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[4481] | 17 | ! Copyright 2017-2020 Leibniz Universitaet Hannover |
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| 18 | ! Copyright 2017-2020 Deutscher Wetterdienst Offenbach |
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[2696] | 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 4481 2020-03-31 18:55:54Z maronga $ |
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[4475] | 28 | ! Bugfix: use explicit loop in 'reverse' subroutine instead of implicit loop |
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| 29 | ! |
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| 30 | ! 3866 2019-04-05 14:25:01Z eckhard |
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[3866] | 31 | ! Use PALM's working precision |
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| 32 | ! Improved coding style |
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| 33 | ! |
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| 34 | ! |
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| 35 | ! 3785 2019-03-06 10:41:14Z eckhard |
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[3618] | 36 | ! Prefixed all INIFOR modules with inifor_ |
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| 37 | ! |
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| 38 | ! |
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| 39 | ! 3557 2018-11-22 16:01:22Z eckhard |
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[3557] | 40 | ! Updated documentation |
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| 41 | ! |
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| 42 | ! |
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| 43 | ! 3447 2018-10-29 15:52:54Z eckhard |
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[3447] | 44 | ! Renamed source files for compatibilty with PALM build system |
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| 45 | ! |
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| 46 | ! |
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| 47 | ! 3395 2018-10-22 17:32:49Z eckhard |
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[3395] | 48 | ! New routines for computing potential temperature and moist air density |
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| 49 | ! Increased number of digits in real-to-str conversion |
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| 50 | ! |
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| 51 | ! 3183 2018-07-27 14:25:55Z suehring |
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[3183] | 52 | ! Improved real-to-string conversion |
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| 53 | ! |
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| 54 | ! |
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| 55 | ! 3182 2018-07-27 13:36:03Z suehring |
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[2696] | 56 | ! Initial revision |
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| 57 | ! |
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| 58 | ! |
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| 59 | ! |
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| 60 | ! Authors: |
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| 61 | ! -------- |
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[3557] | 62 | !> @author Eckhard Kadasch (Deutscher Wetterdienst, Offenbach) |
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[2696] | 63 | ! |
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| 64 | ! Description: |
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| 65 | ! ------------ |
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| 66 | !> The util module provides miscellaneous utility routines for INIFOR. |
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| 67 | !------------------------------------------------------------------------------! |
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[3618] | 68 | MODULE inifor_util |
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[2696] | 69 | |
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[3618] | 70 | USE inifor_defs, & |
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[3866] | 71 | ONLY : PI, DATE, SNAME, wp |
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[3618] | 72 | USE inifor_types, & |
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| 73 | ONLY : grid_definition |
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[2696] | 74 | USE, INTRINSIC :: ISO_C_BINDING, & |
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| 75 | ONLY : C_CHAR, C_INT, C_PTR, C_SIZE_T |
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| 76 | |
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| 77 | IMPLICIT NONE |
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| 78 | |
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[3557] | 79 | !------------------------------------------------------------------------------! |
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| 80 | ! Description: |
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| 81 | ! ------------ |
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| 82 | !> Fortran implementation of C's struct tm for representing points in time |
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| 83 | !------------------------------------------------------------------------------! |
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[2696] | 84 | TYPE, BIND(c) :: tm_struct |
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| 85 | INTEGER(C_INT) :: tm_sec !< seconds after the minute [0, 61] |
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| 86 | INTEGER(C_INT) :: tm_min !< minutes after the hour [0, 59] |
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| 87 | INTEGER(C_INT) :: tm_hour !< hours since midnight [0, 23] |
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| 88 | INTEGER(C_INT) :: tm_mday !< day of the month [1, 31] |
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| 89 | INTEGER(C_INT) :: tm_mon !< month since January [0, 11] |
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| 90 | INTEGER(C_INT) :: tm_year !< years since 1900 |
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| 91 | INTEGER(C_INT) :: tm_wday !< days since Sunday [0, 6] |
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| 92 | INTEGER(C_INT) :: tm_yday !< days since January 1st [0, 356] |
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| 93 | INTEGER(C_INT) :: tm_isdst !< Daylight Saving Time flag |
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| 94 | END TYPE |
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| 95 | |
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[3866] | 96 | INTERFACE |
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[2696] | 97 | |
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[3557] | 98 | !------------------------------------------------------------------------------! |
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| 99 | ! Description: |
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| 100 | ! ------------ |
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| 101 | !> Interface to C's strptime function, which converts a string to a tm |
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| 102 | !> structure. |
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| 103 | !------------------------------------------------------------------------------! |
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[3866] | 104 | FUNCTION strptime(string, format, timeinfo) BIND(c, NAME='strptime') |
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| 105 | IMPORT :: C_CHAR, C_SIZE_T, tm_struct |
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[2696] | 106 | |
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[3866] | 107 | IMPLICIT NONE |
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[2696] | 108 | |
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[3866] | 109 | CHARACTER(KIND=C_CHAR), DIMENSION(*), INTENT(IN) :: string, format |
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| 110 | TYPE(tm_struct), INTENT(OUT) :: timeinfo |
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[2696] | 111 | |
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[3866] | 112 | INTEGER(C_SIZE_T) :: strptime |
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| 113 | END FUNCTION |
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[2696] | 114 | |
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| 115 | |
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[3557] | 116 | !------------------------------------------------------------------------------! |
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| 117 | ! Description: |
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| 118 | ! ------------ |
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| 119 | !> Interface to C's strftime function, which converts the given 'timeinfo' |
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| 120 | !> structure to a string in the given 'format'. |
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| 121 | !------------------------------------------------------------------------------! |
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[3866] | 122 | FUNCTION strftime(string, string_len, format, timeinfo) BIND(c, NAME='strftime') |
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| 123 | IMPORT :: C_CHAR, C_SIZE_T, tm_struct |
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[2696] | 124 | |
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[3866] | 125 | IMPLICIT NONE |
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[2696] | 126 | |
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[3866] | 127 | CHARACTER(KIND=C_CHAR), DIMENSION(*), INTENT(OUT) :: string |
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| 128 | CHARACTER(KIND=C_CHAR), DIMENSION(*), INTENT(IN) :: format |
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| 129 | INTEGER(C_SIZE_T), INTENT(IN) :: string_len |
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| 130 | TYPE(tm_struct), INTENT(IN) :: timeinfo |
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[2696] | 131 | |
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[3866] | 132 | INTEGER(C_SIZE_T) :: strftime |
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| 133 | END FUNCTION |
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[2696] | 134 | |
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| 135 | |
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[3557] | 136 | !------------------------------------------------------------------------------! |
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| 137 | ! Description: |
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| 138 | ! ------------ |
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| 139 | !> Interface to C's mktime function, which converts the given tm structure to |
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| 140 | !> Unix time (number of seconds since 0 UTC, 1st January 1970). INIFOR uses the |
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| 141 | !> side effect that a call to mktime noramlizes the given 'timeinfo' structure, |
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| 142 | !> e.g. increments the date if hours overfow 24. |
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| 143 | !------------------------------------------------------------------------------! |
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[3866] | 144 | FUNCTION mktime(timeinfo) BIND(c, NAME='mktime') |
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| 145 | IMPORT :: C_PTR, tm_struct |
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[2696] | 146 | |
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[3866] | 147 | IMPLICIT NONE |
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[2696] | 148 | |
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[3866] | 149 | TYPE(tm_struct), INTENT(IN) :: timeinfo |
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[2696] | 150 | |
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[3866] | 151 | TYPE(C_PTR) :: mktime |
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| 152 | END FUNCTION |
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[2696] | 153 | |
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[3866] | 154 | END INTERFACE |
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[2696] | 155 | |
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| 156 | CONTAINS |
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| 157 | |
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[3557] | 158 | !------------------------------------------------------------------------------! |
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| 159 | ! Description: |
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| 160 | ! ------------ |
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| 161 | !> Takes a string of the form YYYYMMDDHH, adds the given number of hours to its |
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| 162 | !> tm structure representation, and returns the corresponding string in the same |
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| 163 | !> format |
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| 164 | !------------------------------------------------------------------------------! |
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[3866] | 165 | CHARACTER(LEN=DATE) FUNCTION add_hours_to(date_string, hours) |
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| 166 | CHARACTER(LEN=DATE), INTENT(IN) :: date_string |
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| 167 | INTEGER, INTENT(IN) :: hours |
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[2696] | 168 | |
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[3866] | 169 | CHARACTER(KIND=C_CHAR, LEN=*), PARAMETER :: format_string = "%Y%m%d%H" |
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| 170 | CHARACTER(KIND=C_CHAR, LEN=DATE) :: c_date_string |
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| 171 | TYPE(C_PTR) :: c_pointer |
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| 172 | TYPE(tm_struct) :: time_info |
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| 173 | INTEGER :: err |
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[2696] | 174 | |
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[3866] | 175 | c_date_string = date_string |
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[2696] | 176 | |
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[3866] | 177 | ! Convert C string to C tm struct |
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| 178 | CALL init_tm(time_info) |
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| 179 | err = strptime(c_date_string, format_string, time_info) |
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| 180 | |
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| 181 | ! Manipulate and normalize C tm struct |
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| 182 | time_info%tm_hour = time_info%tm_hour + hours |
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| 183 | c_pointer = mktime(time_info) |
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[2696] | 184 | |
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[3866] | 185 | ! Convert back to C string |
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| 186 | err = strftime(c_date_string, INT(DATE, KIND=C_SIZE_T), & |
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| 187 | format_string, time_info) |
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[2696] | 188 | |
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[3866] | 189 | add_hours_to = c_date_string |
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| 190 | END FUNCTION |
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[2696] | 191 | |
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| 192 | |
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[3557] | 193 | !------------------------------------------------------------------------------! |
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| 194 | ! Description: |
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| 195 | ! ------------ |
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| 196 | !> Print all members of the given tm structure |
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| 197 | !------------------------------------------------------------------------------! |
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[3866] | 198 | SUBROUTINE print_tm(timeinfo) |
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| 199 | TYPE(tm_struct), INTENT(IN) :: timeinfo |
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[2696] | 200 | |
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[3866] | 201 | PRINT *, "sec: ", timeinfo%tm_sec, & !< seconds after the minute [0, 61] |
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| 202 | "min: ", timeinfo%tm_min, & !< minutes after the hour [0, 59] |
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| 203 | "hr: ", timeinfo%tm_hour, & !< hours since midnight [0, 23] |
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| 204 | "day: ", timeinfo%tm_mday, & !< day of the month [1, 31] |
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| 205 | "mon: ", timeinfo%tm_mon, & !< month since January [0, 11] |
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| 206 | "yr: ", timeinfo%tm_year, & !< years since 1900 |
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| 207 | "wday:", timeinfo%tm_wday, & !< days since Sunday [0, 6] |
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| 208 | "yday:", timeinfo%tm_yday, & !< days since January 1st [0, 356] |
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| 209 | "dst: ", timeinfo%tm_isdst !< Daylight Saving time flag |
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| 210 | END SUBROUTINE print_tm |
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[2696] | 211 | |
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| 212 | |
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[3557] | 213 | !------------------------------------------------------------------------------! |
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| 214 | ! Description: |
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| 215 | ! ------------ |
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| 216 | !> Initialize the given tm structure with zero values |
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| 217 | !------------------------------------------------------------------------------! |
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[3866] | 218 | SUBROUTINE init_tm(timeinfo) |
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| 219 | TYPE(tm_struct), INTENT(INOUT) :: timeinfo |
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[2696] | 220 | |
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[3866] | 221 | timeinfo%tm_sec = 0 |
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| 222 | timeinfo%tm_min = 0 |
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| 223 | timeinfo%tm_hour = 0 |
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| 224 | timeinfo%tm_mday = 0 |
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| 225 | timeinfo%tm_mon = 0 |
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| 226 | timeinfo%tm_year = 0 |
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| 227 | timeinfo%tm_wday = 0 |
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| 228 | timeinfo%tm_yday = 0 |
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[2696] | 229 | |
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[3866] | 230 | ! We use UTC times, so marking Daylight Saving Time (DST) 'not available' |
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| 231 | ! (< 0). If this is set to 0, mktime will convert the timeinfo to DST and |
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| 232 | ! add one hour. |
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| 233 | timeinfo%tm_isdst = -1 |
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| 234 | END SUBROUTINE init_tm |
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[2696] | 235 | |
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| 236 | |
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[3557] | 237 | !------------------------------------------------------------------------------! |
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| 238 | ! Description: |
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| 239 | ! ------------ |
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| 240 | !> Fill the given array with values equally spaced between and including start |
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| 241 | !> and stop |
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| 242 | !------------------------------------------------------------------------------! |
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[3866] | 243 | SUBROUTINE linspace(start, stop, array) |
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[2696] | 244 | |
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[3866] | 245 | REAL(wp), INTENT(IN) :: start, stop |
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| 246 | REAL(wp), INTENT(INOUT) :: array(0:) |
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| 247 | INTEGER :: i, n |
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[2696] | 248 | |
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[3866] | 249 | n = UBOUND(array, 1) |
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[2696] | 250 | |
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[3866] | 251 | IF (n .EQ. 0) THEN |
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[2696] | 252 | |
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[3866] | 253 | array(0) = start |
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[2696] | 254 | |
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[3866] | 255 | ELSE |
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[2696] | 256 | |
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[3866] | 257 | DO i = 0, n |
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| 258 | array(i) = start + REAL(i, wp) / n * (stop - start) |
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| 259 | ENDDO |
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[2696] | 260 | |
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[3866] | 261 | ENDIF |
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| 262 | |
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| 263 | END SUBROUTINE linspace |
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[2696] | 264 | |
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| 265 | |
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| 266 | !------------------------------------------------------------------------------! |
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| 267 | ! Description: |
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| 268 | ! ------------ |
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| 269 | !> Reverse the order of the third (vertical) array dimension from top-down |
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| 270 | !> (COSMO) to bottom-up (PALM) |
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| 271 | !------------------------------------------------------------------------------! |
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[3866] | 272 | SUBROUTINE reverse(input_arr) |
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[2696] | 273 | |
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[4475] | 274 | INTEGER :: i |
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| 275 | INTEGER :: lbound_3rd_dimension |
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| 276 | INTEGER :: ubound_3rd_dimension |
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| 277 | |
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[3866] | 278 | REAL(wp), INTENT(INOUT) :: input_arr(:,:,:) |
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[2696] | 279 | |
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[4475] | 280 | lbound_3rd_dimension = LBOUND(input_arr, 3) |
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| 281 | ubound_3rd_dimension = UBOUND(input_arr, 3) |
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[2696] | 282 | |
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[4475] | 283 | DO i = lbound_3rd_dimension, ubound_3rd_dimension |
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| 284 | input_arr(:,:,i) = input_arr(:,:, & |
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| 285 | ubound_3rd_dimension - ( i - lbound_3rd_dimension )) |
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| 286 | ENDDO |
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| 287 | |
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[3866] | 288 | END SUBROUTINE reverse |
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[2696] | 289 | |
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| 290 | |
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[3557] | 291 | !------------------------------------------------------------------------------! |
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| 292 | ! Description: |
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| 293 | ! ------------ |
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| 294 | !> |
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| 295 | !------------------------------------------------------------------------------! |
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[3866] | 296 | SUBROUTINE deaverage(avg_1, t1, avg_2, t2, avg_3, t3) |
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[2696] | 297 | |
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[3866] | 298 | REAL(wp), DIMENSION(:,:,:), INTENT(IN) :: avg_1, avg_2 |
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| 299 | REAL(wp), INTENT(IN) :: t1, t2, t3 |
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| 300 | REAL(wp), DIMENSION(:,:,:), INTENT(OUT) :: avg_3 |
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[2696] | 301 | |
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[3866] | 302 | REAL(wp) :: ti |
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[2696] | 303 | |
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[3866] | 304 | ti = 1.0_wp / t3 |
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[2696] | 305 | |
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[3866] | 306 | avg_3(:,:,:) = ti * ( t2 * avg_2(:,:,:) - t1 * avg_1(:,:,:) ) |
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[2696] | 307 | |
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[3866] | 308 | END SUBROUTINE deaverage |
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[2696] | 309 | |
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| 310 | |
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[3557] | 311 | !------------------------------------------------------------------------------! |
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| 312 | ! Description: |
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| 313 | ! ------------ |
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| 314 | !> Compute the COSMO-DE/-D2 basic state pressure profile |
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| 315 | !------------------------------------------------------------------------------! |
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[3866] | 316 | SUBROUTINE get_basic_state(z, beta, p_sl, t_sl, rd, g, p0) |
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[2696] | 317 | |
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[3866] | 318 | REAL(wp), INTENT(IN) :: z(1:) !< height [m] |
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| 319 | REAL(wp), INTENT(IN) :: beta !< logarithmic lapse rate, dT / d ln(p) [K] |
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| 320 | REAL(wp), INTENT(IN) :: p_sl !< reference pressure [Pa] |
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| 321 | REAL(wp), INTENT(IN) :: t_sl !< reference tempereature [K] |
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| 322 | REAL(wp), INTENT(IN) :: rd !< ideal gas constant of dry air [J/kg/K] |
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| 323 | REAL(wp), INTENT(IN) :: g !< acceleration of Earth's gravity [m/s^2] |
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| 324 | REAL(wp), INTENT(OUT) :: p0(1:) !< COSMO basic state pressure [Pa] |
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| 325 | REAL(wp) :: root_frac, factor !< precomputed factors |
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[2696] | 326 | |
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[3866] | 327 | factor = - t_sl / beta |
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| 328 | root_frac = (2.0_wp * beta * g) / (rd * t_sl*t_sl) |
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[2696] | 329 | |
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[3866] | 330 | p0(:) = p_sl * EXP( & |
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| 331 | factor * ( 1.0_wp - SQRT( 1.0_wp - root_frac * z(:) ) ) & |
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| 332 | ) |
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[2696] | 333 | |
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[3866] | 334 | END SUBROUTINE get_basic_state |
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[2696] | 335 | |
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| 336 | |
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[3395] | 337 | !------------------------------------------------------------------------------! |
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| 338 | ! Description: |
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| 339 | ! ------------ |
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| 340 | !> Converts the absolute temperature to the potential temperature in place using |
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| 341 | !> the identity a^b = e^(b ln(a)). |
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| 342 | !> |
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| 343 | !> theta = T * (p_ref/p)^(R/c_p) = T * e^( R/c_p * ln(p_ref/p) ) |
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| 344 | !------------------------------------------------------------------------------! |
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[3866] | 345 | SUBROUTINE potential_temperature(t, p, p_ref, r, cp) |
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| 346 | REAL(wp), DIMENSION(:,:,:), INTENT(INOUT) :: t |
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| 347 | REAL(wp), DIMENSION(:,:,:), INTENT(IN) :: p |
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| 348 | REAL(wp), INTENT(IN) :: p_ref, r, cp |
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| 349 | REAL(wp) :: rcp |
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[3395] | 350 | |
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[3866] | 351 | rcp = r/cp |
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| 352 | t(:,:,:) = t(:,:,:) * EXP( rcp * LOG(p_ref / p(:,:,:)) ) |
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[3395] | 353 | |
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[3866] | 354 | END SUBROUTINE potential_temperature |
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[3395] | 355 | |
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| 356 | |
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| 357 | !------------------------------------------------------------------------------! |
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| 358 | ! Description: |
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| 359 | ! ------------ |
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| 360 | !> Compute the density in place of the given temperature (t_rho). |
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| 361 | !------------------------------------------------------------------------------! |
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[3866] | 362 | SUBROUTINE moist_density(t_rho, p, qv, rd, rv) |
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| 363 | REAL(wp), DIMENSION(:,:,:), INTENT(INOUT) :: t_rho |
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| 364 | REAL(wp), DIMENSION(:,:,:), INTENT(IN) :: p, qv |
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| 365 | REAL(wp), INTENT(IN) :: rd, rv |
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[3395] | 366 | |
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[3866] | 367 | t_rho(:,:,:) = p(:,:,:) / ( & |
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| 368 | (rv * qv(:,:,:) + rd * (1.0_wp - qv(:,:,:))) * t_rho(:,:,:) & |
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| 369 | ) |
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[3395] | 370 | |
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[3866] | 371 | END SUBROUTINE moist_density |
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[3395] | 372 | |
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[3866] | 373 | !------------------------------------------------------------------------------! |
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| 374 | ! Description: |
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| 375 | ! ------------ |
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| 376 | ! Convert a real number to a string in scientific notation showing four |
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| 377 | ! significant digits. |
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| 378 | !------------------------------------------------------------------------------! |
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| 379 | CHARACTER(LEN=SNAME) FUNCTION real_to_str(val, format) |
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[3395] | 380 | |
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[3866] | 381 | REAL(wp), INTENT(IN) :: val |
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| 382 | CHARACTER(LEN=*), OPTIONAL, INTENT(IN) :: format |
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[2696] | 383 | |
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[3866] | 384 | IF (PRESENT( format ) ) THEN |
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| 385 | WRITE( real_to_str, format ) val |
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| 386 | ELSE |
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| 387 | WRITE( real_to_str, '(E11.4)' ) val |
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| 388 | ENDIF |
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| 389 | real_to_str = ADJUSTL( real_to_str ) |
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[2696] | 390 | |
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[3866] | 391 | END FUNCTION real_to_str |
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[2696] | 392 | |
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| 393 | |
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[3557] | 394 | !------------------------------------------------------------------------------! |
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| 395 | ! Description: |
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| 396 | ! ------------ |
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| 397 | !> Converts the given real value to a string |
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| 398 | !------------------------------------------------------------------------------! |
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[3866] | 399 | CHARACTER(LEN=16) FUNCTION real_to_str_f(val) |
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[2696] | 400 | |
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[3866] | 401 | REAL(wp), INTENT(IN) :: val |
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[2696] | 402 | |
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[3866] | 403 | WRITE(real_to_str_f, '(F16.8)') val |
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| 404 | real_to_str_f = ADJUSTL(real_to_str_f) |
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[2696] | 405 | |
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[3866] | 406 | END FUNCTION real_to_str_f |
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[2696] | 407 | |
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| 408 | |
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[3557] | 409 | !------------------------------------------------------------------------------! |
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| 410 | ! Description: |
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| 411 | ! ------------ |
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| 412 | !> Converts the given integer value to a string |
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| 413 | !------------------------------------------------------------------------------! |
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[3866] | 414 | CHARACTER(LEN=10) FUNCTION str(val) |
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[2696] | 415 | |
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[3866] | 416 | INTEGER, INTENT(IN) :: val |
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[2696] | 417 | |
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[3866] | 418 | WRITE(str, '(i10)') val |
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| 419 | str = ADJUSTL(str) |
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[2696] | 420 | |
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[3866] | 421 | END FUNCTION str |
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[2696] | 422 | |
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| 423 | |
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[3557] | 424 | !------------------------------------------------------------------------------! |
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| 425 | ! Description: |
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| 426 | ! ------------ |
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| 427 | !> If the given path is not conlcuded by a slash, add one. |
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| 428 | !------------------------------------------------------------------------------! |
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[3866] | 429 | SUBROUTINE normalize_path(path) |
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| 430 | |
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| 431 | CHARACTER(LEN=*), INTENT(INOUT) :: path |
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| 432 | INTEGER :: n |
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[2696] | 433 | |
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[3866] | 434 | n = LEN_TRIM(path) |
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[2696] | 435 | |
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[3866] | 436 | IF (path(n:n) .NE. '/') THEN |
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| 437 | path = TRIM(path) // '/' |
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| 438 | ENDIF |
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[2696] | 439 | |
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[3866] | 440 | END SUBROUTINE |
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[2696] | 441 | |
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[3618] | 442 | END MODULE inifor_util |
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