1 | !> @file calc_liquid_water_content.f90 |
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2 | !------------------------------------------------------------------------------! |
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3 | ! This file is part of PALM. |
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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 1997-2017 Leibniz Universitaet Hannover |
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18 | !------------------------------------------------------------------------------! |
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19 | ! |
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20 | ! Current revisions: |
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21 | ! ----------------- |
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22 | ! |
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23 | ! |
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24 | ! Former revisions: |
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25 | ! ----------------- |
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26 | ! $Id: calc_liquid_water_content.f90 2608 2017-11-13 14:04:26Z basit $ |
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27 | ! Calculation of supersaturation in external module (diagnostic_quantities_mod). |
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28 | ! Change: correct calculation of saturation specific humidity to saturation |
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29 | ! mixing ratio (the factor of 0.378 vanishes). |
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30 | ! |
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31 | ! 2292 2017-06-20 09:51:42Z schwenkel |
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32 | ! Implementation of new microphysic scheme: cloud_scheme = 'morrison' |
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33 | ! includes two more prognostic equations for cloud drop concentration (nc) |
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34 | ! and cloud water content (qc). |
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35 | ! |
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36 | ! 2233 2017-05-30 18:08:54Z suehring |
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37 | ! |
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38 | ! 2232 2017-05-30 17:47:52Z suehring |
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39 | ! Adjustments to new topography concept |
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40 | ! |
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41 | ! 2000 2016-08-20 18:09:15Z knoop |
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42 | ! Forced header and separation lines into 80 columns |
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43 | ! |
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44 | ! 1822 2016-04-07 07:49:42Z hoffmann |
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45 | ! icloud_scheme removed. microphysics_seifert added. |
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46 | ! |
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47 | ! 1682 2015-10-07 23:56:08Z knoop |
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48 | ! Code annotations made doxygen readable |
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49 | ! |
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50 | ! 1353 2014-04-08 15:21:23Z heinze |
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51 | ! REAL constants provided with KIND-attribute |
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52 | ! |
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53 | ! 1320 2014-03-20 08:40:49Z raasch |
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54 | ! ONLY-attribute added to USE-statements, |
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55 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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56 | ! kinds are defined in new module kinds, |
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57 | ! revision history before 2012 removed, |
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58 | ! comment fields (!:) to be used for variable explanations added to |
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59 | ! all variable declaration statements |
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60 | ! |
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61 | ! 1253 2013-11-07 10:48:12Z fricke |
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62 | ! Bugfix: q is set to qr in case that q is smaller than qr |
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63 | ! |
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64 | ! 1115 2013-03-26 18:16:16Z hoffmann |
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65 | ! drizzle can be used independently from precipitation |
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66 | ! |
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67 | ! 1053 2012-11-13 17:11:03Z hoffmann |
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68 | ! description expanded to the two-moment cloud scheme |
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69 | ! |
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70 | ! 1036 2012-10-22 13:43:42Z raasch |
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71 | ! code put under GPL (PALM 3.9) |
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72 | ! |
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73 | ! Revision 1.1 2000/04/13 14:50:45 schroeter |
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74 | ! Initial revision |
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75 | ! |
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76 | ! |
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77 | ! |
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78 | ! Description: |
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79 | ! ------------ |
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80 | !> Calculation of the liquid water content (0%-or-100%-scheme). This scheme is |
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81 | !> used by the one and the two moment cloud physics scheme. Using the two moment |
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82 | !> scheme, this calculation results in the cloud water content. |
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83 | !------------------------------------------------------------------------------! |
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84 | SUBROUTINE calc_liquid_water_content |
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85 | |
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86 | |
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87 | |
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88 | USE arrays_3d, & |
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89 | ONLY: q, qc, ql, qr |
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90 | |
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91 | USE control_parameters, & |
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92 | ONLY: microphysics_morrison, microphysics_seifert |
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93 | |
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94 | USE diagnostic_quantities_mod, & |
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95 | ONLY: e_s, magnus, q_s, sat, supersaturation, t_l |
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96 | |
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97 | USE indices, & |
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98 | ONLY: nxlg, nxrg, nyng, nysg, nzb, nzt, wall_flags_0 |
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99 | |
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100 | USE kinds |
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101 | |
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102 | USE pegrid |
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103 | |
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104 | |
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105 | IMPLICIT NONE |
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106 | |
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107 | INTEGER(iwp) :: i !< |
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108 | INTEGER(iwp) :: j !< |
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109 | INTEGER(iwp) :: k !< |
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110 | |
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111 | |
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112 | DO i = nxlg, nxrg |
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113 | DO j = nysg, nyng |
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114 | DO k = nzb+1, nzt |
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115 | |
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116 | ! |
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117 | !-- Call calculation of supersaturation located |
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118 | !-- in diagnostic_quantities_mod |
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119 | CALL supersaturation ( i, j, k ) |
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120 | |
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121 | ! |
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122 | !-- Compute the liquid water content |
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123 | IF ( microphysics_seifert .AND. .NOT. microphysics_morrison ) & |
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124 | THEN |
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125 | IF ( ( q(k,j,i) - q_s - qr(k,j,i) ) > 0.0_wp ) THEN |
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126 | qc(k,j,i) = ( q(k,j,i) - q_s - qr(k,j,i) ) & |
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127 | * MERGE( 1.0_wp, 0.0_wp, & |
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128 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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129 | ql(k,j,i) = ( qc(k,j,i) + qr(k,j,i) ) & |
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130 | * MERGE( 1.0_wp, 0.0_wp, & |
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131 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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132 | ELSE |
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133 | IF ( q(k,j,i) < qr(k,j,i) ) q(k,j,i) = qr(k,j,i) |
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134 | qc(k,j,i) = 0.0_wp |
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135 | ql(k,j,i) = qr(k,j,i) & |
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136 | * MERGE( 1.0_wp, 0.0_wp, & |
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137 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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138 | ENDIF |
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139 | ELSEIF ( microphysics_morrison ) THEN |
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140 | ql(k,j,i) = qc(k,j,i) + qr(k,j,i) & |
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141 | * MERGE( 1.0_wp, 0.0_wp, & |
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142 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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143 | ELSE |
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144 | IF ( ( q(k,j,i) - q_s ) > 0.0_wp ) THEN |
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145 | qc(k,j,i) = ( q(k,j,i) - q_s ) & |
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146 | * MERGE( 1.0_wp, 0.0_wp, & |
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147 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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148 | ql(k,j,i) = qc(k,j,i) & |
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149 | * MERGE( 1.0_wp, 0.0_wp, & |
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150 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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151 | ELSE |
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152 | qc(k,j,i) = 0.0_wp |
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153 | ql(k,j,i) = 0.0_wp |
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154 | ENDIF |
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155 | ENDIF |
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156 | ENDDO |
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157 | ENDDO |
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158 | ENDDO |
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159 | |
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160 | END SUBROUTINE calc_liquid_water_content |
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