| 1 | MODULE calc_precipitation_mod |
|---|
| 2 | |
|---|
| 3 | !--------------------------------------------------------------------------------! |
|---|
| 4 | ! This file is part of PALM. |
|---|
| 5 | ! |
|---|
| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
|---|
| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
|---|
| 8 | ! either version 3 of the License, or (at your option) any later version. |
|---|
| 9 | ! |
|---|
| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
|---|
| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
|---|
| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
|---|
| 13 | ! |
|---|
| 14 | ! You should have received a copy of the GNU General Public License along with |
|---|
| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
|---|
| 16 | ! |
|---|
| 17 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
|---|
| 18 | !--------------------------------------------------------------------------------! |
|---|
| 19 | ! |
|---|
| 20 | ! Current revisions: |
|---|
| 21 | ! ----------------- |
|---|
| 22 | ! |
|---|
| 23 | ! |
|---|
| 24 | ! Former revisions: |
|---|
| 25 | ! ----------------- |
|---|
| 26 | ! $Id: calc_precipitation.f90 1321 2014-03-20 09:40:40Z suehring $ |
|---|
| 27 | ! |
|---|
| 28 | ! 1320 2014-03-20 08:40:49Z raasch |
|---|
| 29 | ! ONLY-attribute added to USE-statements, |
|---|
| 30 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
|---|
| 31 | ! kinds are defined in new module kinds, |
|---|
| 32 | ! revision history before 2012 removed, |
|---|
| 33 | ! comment fields (!:) to be used for variable explanations added to |
|---|
| 34 | ! all variable declaration statements |
|---|
| 35 | ! |
|---|
| 36 | ! 1036 2012-10-22 13:43:42Z raasch |
|---|
| 37 | ! code put under GPL (PALM 3.9) |
|---|
| 38 | ! |
|---|
| 39 | ! Revision 1.1 2000/04/13 14:45:22 schroeter |
|---|
| 40 | ! Initial revision |
|---|
| 41 | ! |
|---|
| 42 | ! |
|---|
| 43 | ! |
|---|
| 44 | ! Description: |
|---|
| 45 | ! ------------ |
|---|
| 46 | ! Calculate the change of total water content due to precipitation |
|---|
| 47 | ! (simplified Kessler scheme) |
|---|
| 48 | !------------------------------------------------------------------------------! |
|---|
| 49 | |
|---|
| 50 | PRIVATE |
|---|
| 51 | PUBLIC calc_precipitation |
|---|
| 52 | |
|---|
| 53 | INTERFACE calc_precipitation |
|---|
| 54 | MODULE PROCEDURE calc_precipitation |
|---|
| 55 | MODULE PROCEDURE calc_precipitation_ij |
|---|
| 56 | END INTERFACE calc_precipitation |
|---|
| 57 | |
|---|
| 58 | CONTAINS |
|---|
| 59 | |
|---|
| 60 | |
|---|
| 61 | !------------------------------------------------------------------------------! |
|---|
| 62 | ! Call for all grid points |
|---|
| 63 | !------------------------------------------------------------------------------! |
|---|
| 64 | SUBROUTINE calc_precipitation |
|---|
| 65 | |
|---|
| 66 | USE arrays_3d, & |
|---|
| 67 | ONLY: dzw, ql, tend |
|---|
| 68 | |
|---|
| 69 | USE cloud_parameters, & |
|---|
| 70 | ONLY: precipitation_amount, precipitation_rate, prec_time_const, & |
|---|
| 71 | ql_crit |
|---|
| 72 | |
|---|
| 73 | USE control_parameters, & |
|---|
| 74 | ONLY: dt_do2d_xy, dt_3d, & |
|---|
| 75 | intermediate_timestep_count, intermediate_timestep_count_max,& |
|---|
| 76 | precipitation_amount_interval, time_do2d_xy |
|---|
| 77 | |
|---|
| 78 | USE indices, & |
|---|
| 79 | ONLY: nxl, nxr, nyn, nys, nzb_2d, nzt |
|---|
| 80 | |
|---|
| 81 | USE kinds |
|---|
| 82 | |
|---|
| 83 | |
|---|
| 84 | IMPLICIT NONE |
|---|
| 85 | |
|---|
| 86 | INTEGER(iwp) :: i !: |
|---|
| 87 | INTEGER(iwp) :: j !: |
|---|
| 88 | INTEGER(iwp) :: k !: |
|---|
| 89 | |
|---|
| 90 | REAL(wp) :: dqdt_precip !: |
|---|
| 91 | |
|---|
| 92 | precipitation_rate = 0.0 |
|---|
| 93 | |
|---|
| 94 | DO i = nxl, nxr |
|---|
| 95 | DO j = nys, nyn |
|---|
| 96 | DO k = nzb_2d(j,i)+1, nzt |
|---|
| 97 | |
|---|
| 98 | IF ( ql(k,j,i) > ql_crit ) THEN |
|---|
| 99 | dqdt_precip = prec_time_const * ( ql(k,j,i) - ql_crit ) |
|---|
| 100 | ELSE |
|---|
| 101 | dqdt_precip = 0.0 |
|---|
| 102 | ENDIF |
|---|
| 103 | tend(k,j,i) = tend(k,j,i) - dqdt_precip |
|---|
| 104 | ! |
|---|
| 105 | !-- Precipitation rate in kg / m**2 / s (= mm/s) |
|---|
| 106 | precipitation_rate(j,i) = precipitation_rate(j,i) + & |
|---|
| 107 | dqdt_precip * dzw(k) |
|---|
| 108 | |
|---|
| 109 | ENDDO |
|---|
| 110 | ! |
|---|
| 111 | !-- Sum up the precipitation amount, unit kg / m**2 (= mm) |
|---|
| 112 | IF ( intermediate_timestep_count == & |
|---|
| 113 | intermediate_timestep_count_max .AND. & |
|---|
| 114 | ( dt_do2d_xy-time_do2d_xy ) < precipitation_amount_interval )& |
|---|
| 115 | THEN |
|---|
| 116 | precipitation_amount(j,i) = precipitation_amount(j,i) + & |
|---|
| 117 | precipitation_rate(j,i) * dt_3d |
|---|
| 118 | ENDIF |
|---|
| 119 | ENDDO |
|---|
| 120 | ENDDO |
|---|
| 121 | |
|---|
| 122 | END SUBROUTINE calc_precipitation |
|---|
| 123 | |
|---|
| 124 | |
|---|
| 125 | !------------------------------------------------------------------------------! |
|---|
| 126 | ! Call for grid point i,j |
|---|
| 127 | !------------------------------------------------------------------------------! |
|---|
| 128 | SUBROUTINE calc_precipitation_ij( i, j ) |
|---|
| 129 | |
|---|
| 130 | USE arrays_3d, & |
|---|
| 131 | ONLY: dzw, ql, tend |
|---|
| 132 | |
|---|
| 133 | USE cloud_parameters, & |
|---|
| 134 | ONLY: precipitation_amount, precipitation_rate, prec_time_const, & |
|---|
| 135 | ql_crit |
|---|
| 136 | |
|---|
| 137 | USE control_parameters, & |
|---|
| 138 | ONLY: dt_do2d_xy, dt_3d, & |
|---|
| 139 | intermediate_timestep_count, intermediate_timestep_count_max,& |
|---|
| 140 | precipitation_amount_interval, time_do2d_xy |
|---|
| 141 | |
|---|
| 142 | USE indices, & |
|---|
| 143 | ONLY: nzb_2d, nzt |
|---|
| 144 | |
|---|
| 145 | USE kinds |
|---|
| 146 | |
|---|
| 147 | |
|---|
| 148 | IMPLICIT NONE |
|---|
| 149 | |
|---|
| 150 | INTEGER(iwp) :: i !: |
|---|
| 151 | INTEGER(iwp) :: j !: |
|---|
| 152 | INTEGER(iwp) :: k !: |
|---|
| 153 | |
|---|
| 154 | REAL(wp) :: dqdt_precip !: |
|---|
| 155 | |
|---|
| 156 | precipitation_rate(j,i) = 0.0 |
|---|
| 157 | |
|---|
| 158 | ! |
|---|
| 159 | !-- Ghostpoints are included (although not needed for tend) to avoid a later |
|---|
| 160 | !-- exchange of these data for the precipitation amount/rate arrays |
|---|
| 161 | DO k = nzb_2d(j,i)+1, nzt |
|---|
| 162 | |
|---|
| 163 | IF ( ql(k,j,i) > ql_crit ) THEN |
|---|
| 164 | dqdt_precip = prec_time_const * ( ql(k,j,i) - ql_crit ) |
|---|
| 165 | ELSE |
|---|
| 166 | dqdt_precip = 0.0 |
|---|
| 167 | ENDIF |
|---|
| 168 | tend(k,j,i) = tend(k,j,i) - dqdt_precip |
|---|
| 169 | |
|---|
| 170 | ! |
|---|
| 171 | !-- Precipitation rate in kg / m**2 / s (= mm/s) |
|---|
| 172 | precipitation_rate(j,i) = precipitation_rate(j,i) + dqdt_precip * & |
|---|
| 173 | dzw(k) |
|---|
| 174 | |
|---|
| 175 | ENDDO |
|---|
| 176 | |
|---|
| 177 | ! |
|---|
| 178 | !-- Sum up the precipitation amount , unit kg / m**2 (= mm) |
|---|
| 179 | IF ( intermediate_timestep_count == intermediate_timestep_count_max & |
|---|
| 180 | .AND. ( dt_do2d_xy-time_do2d_xy ) < precipitation_amount_interval )& |
|---|
| 181 | THEN |
|---|
| 182 | precipitation_amount(j,i) = precipitation_amount(j,i) + & |
|---|
| 183 | precipitation_rate(j,i) * dt_3d |
|---|
| 184 | ENDIF |
|---|
| 185 | |
|---|
| 186 | END SUBROUTINE calc_precipitation_ij |
|---|
| 187 | |
|---|
| 188 | END MODULE calc_precipitation_mod |
|---|
