| 1 | MODULE subsidence_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: subsidence.f90 1354 2014-04-08 15:22:57Z witha $ |
|---|
| 27 | ! |
|---|
| 28 | ! 1353 2014-04-08 15:21:23Z heinze |
|---|
| 29 | ! REAL constants provided with KIND-attribute |
|---|
| 30 | ! |
|---|
| 31 | ! 1320 2014-03-20 08:40:49Z raasch |
|---|
| 32 | ! ONLY-attribute added to USE-statements, |
|---|
| 33 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
|---|
| 34 | ! kinds are defined in new module kinds, |
|---|
| 35 | ! old module precision_kind is removed, |
|---|
| 36 | ! revision history before 2012 removed, |
|---|
| 37 | ! comment fields (!:) to be used for variable explanations added to |
|---|
| 38 | ! all variable declaration statements |
|---|
| 39 | ! |
|---|
| 40 | ! 1036 2012-10-22 13:43:42Z raasch |
|---|
| 41 | ! code put under GPL (PALM 3.9) |
|---|
| 42 | ! |
|---|
| 43 | ! Revision 3.7 2009-12-11 14:15:58Z heinze |
|---|
| 44 | ! Initial revision |
|---|
| 45 | ! |
|---|
| 46 | ! Description: |
|---|
| 47 | ! ------------ |
|---|
| 48 | ! Impact of large-scale subsidence or ascent as tendency term for use |
|---|
| 49 | ! in the prognostic equation of potential temperature. This enables the |
|---|
| 50 | ! construction of a constant boundary layer height z_i with time. |
|---|
| 51 | !-----------------------------------------------------------------------------! |
|---|
| 52 | |
|---|
| 53 | |
|---|
| 54 | IMPLICIT NONE |
|---|
| 55 | |
|---|
| 56 | PRIVATE |
|---|
| 57 | PUBLIC init_w_subsidence, subsidence |
|---|
| 58 | |
|---|
| 59 | INTERFACE init_w_subsidence |
|---|
| 60 | MODULE PROCEDURE init_w_subsidence |
|---|
| 61 | END INTERFACE init_w_subsidence |
|---|
| 62 | |
|---|
| 63 | INTERFACE subsidence |
|---|
| 64 | MODULE PROCEDURE subsidence |
|---|
| 65 | MODULE PROCEDURE subsidence_ij |
|---|
| 66 | END INTERFACE subsidence |
|---|
| 67 | |
|---|
| 68 | CONTAINS |
|---|
| 69 | |
|---|
| 70 | SUBROUTINE init_w_subsidence |
|---|
| 71 | |
|---|
| 72 | USE arrays_3d, & |
|---|
| 73 | ONLY: dzu, w_subs, zu |
|---|
| 74 | |
|---|
| 75 | USE control_parameters, & |
|---|
| 76 | ONLY: message_string, ocean, subs_vertical_gradient, & |
|---|
| 77 | subs_vertical_gradient_level, subs_vertical_gradient_level_i |
|---|
| 78 | |
|---|
| 79 | USE indices, & |
|---|
| 80 | ONLY: nzb, nzt |
|---|
| 81 | |
|---|
| 82 | USE kinds |
|---|
| 83 | |
|---|
| 84 | IMPLICIT NONE |
|---|
| 85 | |
|---|
| 86 | INTEGER(iwp) :: i !: |
|---|
| 87 | INTEGER(iwp) :: k !: |
|---|
| 88 | |
|---|
| 89 | REAL(wp) :: gradient !: |
|---|
| 90 | REAL(wp) :: ws_surface !: |
|---|
| 91 | |
|---|
| 92 | IF ( .NOT. ALLOCATED( w_subs )) THEN |
|---|
| 93 | ALLOCATE( w_subs(nzb:nzt+1) ) |
|---|
| 94 | w_subs = 0.0_wp |
|---|
| 95 | ENDIF |
|---|
| 96 | |
|---|
| 97 | IF ( ocean ) THEN |
|---|
| 98 | message_string = 'Applying large scale vertical motion is not ' // & |
|---|
| 99 | 'allowed for ocean runs' |
|---|
| 100 | CALL message( 'init_w_subsidence', 'PA0324', 2, 2, 0, 6, 0 ) |
|---|
| 101 | ENDIF |
|---|
| 102 | |
|---|
| 103 | ! |
|---|
| 104 | !-- Compute the profile of the subsidence/ascent velocity |
|---|
| 105 | !-- using the given gradients |
|---|
| 106 | i = 1 |
|---|
| 107 | gradient = 0.0_wp |
|---|
| 108 | ws_surface = 0.0_wp |
|---|
| 109 | |
|---|
| 110 | |
|---|
| 111 | subs_vertical_gradient_level_i(1) = 0 |
|---|
| 112 | DO k = 1, nzt+1 |
|---|
| 113 | IF ( i < 11 ) THEN |
|---|
| 114 | IF ( subs_vertical_gradient_level(i) < zu(k) .AND. & |
|---|
| 115 | subs_vertical_gradient_level(i) >= 0.0_wp ) THEN |
|---|
| 116 | gradient = subs_vertical_gradient(i) / 100.0_wp |
|---|
| 117 | subs_vertical_gradient_level_i(i) = k - 1 |
|---|
| 118 | i = i + 1 |
|---|
| 119 | ENDIF |
|---|
| 120 | ENDIF |
|---|
| 121 | IF ( gradient /= 0.0_wp ) THEN |
|---|
| 122 | IF ( k /= 1 ) THEN |
|---|
| 123 | w_subs(k) = w_subs(k-1) + dzu(k) * gradient |
|---|
| 124 | ELSE |
|---|
| 125 | w_subs(k) = ws_surface + 0.5_wp * dzu(k) * gradient |
|---|
| 126 | ENDIF |
|---|
| 127 | ELSE |
|---|
| 128 | w_subs(k) = w_subs(k-1) |
|---|
| 129 | ENDIF |
|---|
| 130 | ENDDO |
|---|
| 131 | |
|---|
| 132 | ! |
|---|
| 133 | !-- In case of no given gradients for the subsidence/ascent velocity, |
|---|
| 134 | !-- choose zero gradient |
|---|
| 135 | IF ( subs_vertical_gradient_level(1) == -9999999.9_wp ) THEN |
|---|
| 136 | subs_vertical_gradient_level(1) = 0.0_wp |
|---|
| 137 | ENDIF |
|---|
| 138 | |
|---|
| 139 | END SUBROUTINE init_w_subsidence |
|---|
| 140 | |
|---|
| 141 | |
|---|
| 142 | SUBROUTINE subsidence( tendency, var, var_init ) |
|---|
| 143 | |
|---|
| 144 | USE arrays_3d, & |
|---|
| 145 | ONLY: ddzu, w_subs |
|---|
| 146 | |
|---|
| 147 | USE control_parameters, & |
|---|
| 148 | ONLY: dt_3d |
|---|
| 149 | |
|---|
| 150 | USE indices, & |
|---|
| 151 | ONLY: nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzb_s_inner,& |
|---|
| 152 | nzt |
|---|
| 153 | |
|---|
| 154 | USE kinds |
|---|
| 155 | |
|---|
| 156 | IMPLICIT NONE |
|---|
| 157 | |
|---|
| 158 | INTEGER(iwp) :: i !: |
|---|
| 159 | INTEGER(iwp) :: j !: |
|---|
| 160 | INTEGER(iwp) :: k !: |
|---|
| 161 | |
|---|
| 162 | REAL(wp) :: tmp_grad !: |
|---|
| 163 | |
|---|
| 164 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !: |
|---|
| 165 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: tendency !: |
|---|
| 166 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_init !: |
|---|
| 167 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_mod !: |
|---|
| 168 | |
|---|
| 169 | var_mod = var_init |
|---|
| 170 | |
|---|
| 171 | ! |
|---|
| 172 | !-- Influence of w_subsidence on the current tendency term |
|---|
| 173 | DO i = nxl, nxr |
|---|
| 174 | DO j = nys, nyn |
|---|
| 175 | DO k = nzb_s_inner(j,i)+1, nzt |
|---|
| 176 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
|---|
| 177 | tendency(k,j,i) = tendency(k,j,i) - w_subs(k) * & |
|---|
| 178 | ( var(k+1,j,i) - var(k,j,i) ) * ddzu(k+1) |
|---|
| 179 | ELSE ! large-scale ascent |
|---|
| 180 | tendency(k,j,i) = tendency(k,j,i) - w_subs(k) * & |
|---|
| 181 | ( var(k,j,i) - var(k-1,j,i) ) * ddzu(k) |
|---|
| 182 | ENDIF |
|---|
| 183 | ENDDO |
|---|
| 184 | ENDDO |
|---|
| 185 | ENDDO |
|---|
| 186 | |
|---|
| 187 | ! |
|---|
| 188 | !-- Shifting of the initial profile is especially necessary with Rayleigh |
|---|
| 189 | !-- damping switched on |
|---|
| 190 | |
|---|
| 191 | DO k = nzb, nzt |
|---|
| 192 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
|---|
| 193 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
|---|
| 194 | ( var_init(k+1) - var_init(k) ) * ddzu(k+1) |
|---|
| 195 | ENDIF |
|---|
| 196 | ENDDO |
|---|
| 197 | ! |
|---|
| 198 | !-- At the upper boundary, the initial profile is shifted with aid of |
|---|
| 199 | !-- the gradient tmp_grad. (This is ok if the gradients are linear.) |
|---|
| 200 | IF ( w_subs(nzt) < 0.0_wp ) THEN |
|---|
| 201 | tmp_grad = ( var_init(nzt+1) - var_init(nzt) ) * ddzu(nzt+1) |
|---|
| 202 | var_mod(nzt+1) = var_init(nzt+1) - & |
|---|
| 203 | dt_3d * w_subs(nzt+1) * tmp_grad |
|---|
| 204 | ENDIF |
|---|
| 205 | |
|---|
| 206 | |
|---|
| 207 | DO k = nzt+1, nzb+1, -1 |
|---|
| 208 | IF ( w_subs(k) >= 0.0_wp ) THEN ! large-scale ascent |
|---|
| 209 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
|---|
| 210 | ( var_init(k) - var_init(k-1) ) * ddzu(k) |
|---|
| 211 | ENDIF |
|---|
| 212 | ENDDO |
|---|
| 213 | ! |
|---|
| 214 | !-- At the lower boundary shifting is not necessary because the |
|---|
| 215 | !-- subsidence velocity w_subs(nzb) vanishes. |
|---|
| 216 | |
|---|
| 217 | |
|---|
| 218 | IF ( w_subs(nzb+1) >= 0.0_wp ) THEN |
|---|
| 219 | var_mod(nzb) = var_init(nzb) |
|---|
| 220 | ENDIF |
|---|
| 221 | |
|---|
| 222 | var_init = var_mod |
|---|
| 223 | |
|---|
| 224 | |
|---|
| 225 | END SUBROUTINE subsidence |
|---|
| 226 | |
|---|
| 227 | SUBROUTINE subsidence_ij( i, j, tendency, var, var_init ) |
|---|
| 228 | |
|---|
| 229 | USE arrays_3d, & |
|---|
| 230 | ONLY: ddzu, w_subs |
|---|
| 231 | |
|---|
| 232 | USE control_parameters, & |
|---|
| 233 | ONLY: dt_3d |
|---|
| 234 | |
|---|
| 235 | USE indices, & |
|---|
| 236 | ONLY: nxl, nxlg, nxrg, nyng, nys, nysg, nzb_s_inner, nzb, nzt |
|---|
| 237 | |
|---|
| 238 | USE kinds |
|---|
| 239 | |
|---|
| 240 | IMPLICIT NONE |
|---|
| 241 | |
|---|
| 242 | INTEGER(iwp) :: i !: |
|---|
| 243 | INTEGER(iwp) :: j !: |
|---|
| 244 | INTEGER(iwp) :: k !: |
|---|
| 245 | |
|---|
| 246 | REAL(wp) :: tmp_grad !: |
|---|
| 247 | |
|---|
| 248 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !: |
|---|
| 249 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: tendency !: |
|---|
| 250 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_init !: |
|---|
| 251 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_mod !: |
|---|
| 252 | |
|---|
| 253 | var_mod = var_init |
|---|
| 254 | |
|---|
| 255 | ! |
|---|
| 256 | !-- Influence of w_subsidence on the current tendency term |
|---|
| 257 | DO k = nzb_s_inner(j,i)+1, nzt |
|---|
| 258 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
|---|
| 259 | tendency(k,j,i) = tendency(k,j,i) - w_subs(k) * & |
|---|
| 260 | ( var(k+1,j,i) - var(k,j,i) ) * ddzu(k+1) |
|---|
| 261 | ELSE ! large-scale ascent |
|---|
| 262 | tendency(k,j,i) = tendency(k,j,i) - w_subs(k) * & |
|---|
| 263 | ( var(k,j,i) - var(k-1,j,i) ) * ddzu(k) |
|---|
| 264 | ENDIF |
|---|
| 265 | ENDDO |
|---|
| 266 | |
|---|
| 267 | |
|---|
| 268 | ! |
|---|
| 269 | !-- Shifting of the initial profile is especially necessary with Rayleigh |
|---|
| 270 | !-- damping switched on |
|---|
| 271 | IF ( i == nxl .AND. j == nys ) THEN ! shifting only once per PE |
|---|
| 272 | |
|---|
| 273 | DO k = nzb, nzt |
|---|
| 274 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
|---|
| 275 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
|---|
| 276 | ( var_init(k+1) - var_init(k) ) * ddzu(k+1) |
|---|
| 277 | ENDIF |
|---|
| 278 | ENDDO |
|---|
| 279 | ! |
|---|
| 280 | !-- At the upper boundary, the initial profile is shifted with aid of |
|---|
| 281 | !-- the gradient tmp_grad. (This is ok if the gradients are linear.) |
|---|
| 282 | IF ( w_subs(nzt) < 0.0_wp ) THEN |
|---|
| 283 | tmp_grad = ( var_init(nzt+1) - var_init(nzt) ) * ddzu(nzt+1) |
|---|
| 284 | var_mod(nzt+1) = var_init(nzt+1) - & |
|---|
| 285 | dt_3d * w_subs(nzt+1) * tmp_grad |
|---|
| 286 | ENDIF |
|---|
| 287 | |
|---|
| 288 | |
|---|
| 289 | DO k = nzt+1, nzb+1, -1 |
|---|
| 290 | IF ( w_subs(k) >= 0.0_wp ) THEN ! large-scale ascent |
|---|
| 291 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
|---|
| 292 | ( var_init(k) - var_init(k-1) ) * ddzu(k) |
|---|
| 293 | ENDIF |
|---|
| 294 | ENDDO |
|---|
| 295 | ! |
|---|
| 296 | !-- At the lower boundary shifting is not necessary because the |
|---|
| 297 | !-- subsidence velocity w_subs(nzb) vanishes. |
|---|
| 298 | |
|---|
| 299 | |
|---|
| 300 | IF ( w_subs(nzb+1) >= 0.0_wp ) THEN |
|---|
| 301 | var_mod(nzb) = var_init(nzb) |
|---|
| 302 | ENDIF |
|---|
| 303 | |
|---|
| 304 | var_init = var_mod |
|---|
| 305 | |
|---|
| 306 | ENDIF |
|---|
| 307 | |
|---|
| 308 | END SUBROUTINE subsidence_ij |
|---|
| 309 | |
|---|
| 310 | |
|---|
| 311 | END MODULE subsidence_mod |
|---|
