| 1 | !> @file subsidence_mod.f90 |
|---|
| 2 | !--------------------------------------------------------------------------------------------------! |
|---|
| 3 | ! This file is part of the PALM model system. |
|---|
| 4 | ! |
|---|
| 5 | ! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General |
|---|
| 6 | ! Public License as published by the Free Software Foundation, either version 3 of the License, or |
|---|
| 7 | ! (at your option) any later version. |
|---|
| 8 | ! |
|---|
| 9 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the |
|---|
| 10 | ! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
|---|
| 11 | ! Public License for more details. |
|---|
| 12 | ! |
|---|
| 13 | ! You should have received a copy of the GNU General Public License along with PALM. If not, see |
|---|
| 14 | ! <http://www.gnu.org/licenses/>. |
|---|
| 15 | ! |
|---|
| 16 | ! Copyright 1997-2021 Leibniz Universitaet Hannover |
|---|
| 17 | !--------------------------------------------------------------------------------------------------! |
|---|
| 18 | ! |
|---|
| 19 | ! |
|---|
| 20 | ! Current revisions: |
|---|
| 21 | ! ----------------- |
|---|
| 22 | ! |
|---|
| 23 | ! |
|---|
| 24 | ! Former revisions: |
|---|
| 25 | ! ----------------- |
|---|
| 26 | ! $Id: subsidence_mod.f90 4828 2021-01-05 11:21:41Z Giersch $ |
|---|
| 27 | ! File re-formatted to follow the PALM coding standard |
|---|
| 28 | ! |
|---|
| 29 | ! |
|---|
| 30 | ! 4360 2020-01-07 11:25:50Z suehring |
|---|
| 31 | ! Introduction of wall_flags_total_0, which currently sets bits based on static topography |
|---|
| 32 | ! information used in wall_flags_static_0 |
|---|
| 33 | ! |
|---|
| 34 | ! 4329 2019-12-10 15:46:36Z motisi |
|---|
| 35 | ! Renamed wall_flags_0 to wall_flags_static_0 |
|---|
| 36 | ! |
|---|
| 37 | ! 4182 2019-08-22 15:20:23Z scharf |
|---|
| 38 | ! Corrected "Former revisions" section |
|---|
| 39 | ! |
|---|
| 40 | ! 3655 2019-01-07 16:51:22Z knoop |
|---|
| 41 | ! Add subroutine and variable description |
|---|
| 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 in the prognostic equation of |
|---|
| 49 | !> potential temperature. This enables the construction of a constant boundary layer height z_i with |
|---|
| 50 | !> time. |
|---|
| 51 | !--------------------------------------------------------------------------------------------------! |
|---|
| 52 | MODULE subsidence_mod |
|---|
| 53 | |
|---|
| 54 | |
|---|
| 55 | IMPLICIT NONE |
|---|
| 56 | |
|---|
| 57 | PRIVATE |
|---|
| 58 | PUBLIC init_w_subsidence, subsidence |
|---|
| 59 | |
|---|
| 60 | INTERFACE init_w_subsidence |
|---|
| 61 | MODULE PROCEDURE init_w_subsidence |
|---|
| 62 | END INTERFACE init_w_subsidence |
|---|
| 63 | |
|---|
| 64 | INTERFACE subsidence |
|---|
| 65 | MODULE PROCEDURE subsidence |
|---|
| 66 | MODULE PROCEDURE subsidence_ij |
|---|
| 67 | END INTERFACE subsidence |
|---|
| 68 | |
|---|
| 69 | CONTAINS |
|---|
| 70 | |
|---|
| 71 | !--------------------------------------------------------------------------------------------------! |
|---|
| 72 | ! Description: |
|---|
| 73 | ! ------------ |
|---|
| 74 | !> Initialize vertical subsidence velocity w_subs. |
|---|
| 75 | !--------------------------------------------------------------------------------------------------! |
|---|
| 76 | SUBROUTINE init_w_subsidence |
|---|
| 77 | |
|---|
| 78 | USE arrays_3d, & |
|---|
| 79 | ONLY: dzu, & |
|---|
| 80 | w_subs, & |
|---|
| 81 | zu |
|---|
| 82 | |
|---|
| 83 | USE control_parameters, & |
|---|
| 84 | ONLY: message_string, & |
|---|
| 85 | ocean_mode, & |
|---|
| 86 | subs_vertical_gradient, & |
|---|
| 87 | subs_vertical_gradient_level, & |
|---|
| 88 | subs_vertical_gradient_level_i |
|---|
| 89 | |
|---|
| 90 | USE indices, & |
|---|
| 91 | ONLY: nzb, & |
|---|
| 92 | nzt |
|---|
| 93 | |
|---|
| 94 | USE kinds |
|---|
| 95 | |
|---|
| 96 | IMPLICIT NONE |
|---|
| 97 | |
|---|
| 98 | INTEGER(iwp) :: i !< loop index |
|---|
| 99 | INTEGER(iwp) :: k !< loop index |
|---|
| 100 | |
|---|
| 101 | REAL(wp) :: gradient !< vertical gradient of subsidence velocity |
|---|
| 102 | REAL(wp) :: ws_surface !< subsidence velocity at the surface |
|---|
| 103 | |
|---|
| 104 | IF ( .NOT. ALLOCATED( w_subs ) ) THEN |
|---|
| 105 | ALLOCATE( w_subs(nzb:nzt+1) ) |
|---|
| 106 | w_subs = 0.0_wp |
|---|
| 107 | ENDIF |
|---|
| 108 | |
|---|
| 109 | IF ( ocean_mode ) THEN |
|---|
| 110 | message_string = 'applying large scale vertical motion is not allowed for ocean mode' |
|---|
| 111 | CALL message( 'init_w_subsidence', 'PA0324', 2, 2, 0, 6, 0 ) |
|---|
| 112 | ENDIF |
|---|
| 113 | |
|---|
| 114 | ! |
|---|
| 115 | !-- Compute the profile of the subsidence/ascent velocity using the given gradients |
|---|
| 116 | i = 1 |
|---|
| 117 | gradient = 0.0_wp |
|---|
| 118 | ws_surface = 0.0_wp |
|---|
| 119 | |
|---|
| 120 | |
|---|
| 121 | subs_vertical_gradient_level_i(1) = 0 |
|---|
| 122 | DO k = 1, nzt+1 |
|---|
| 123 | IF ( i < 11 ) THEN |
|---|
| 124 | IF ( subs_vertical_gradient_level(i) < zu(k) .AND. & |
|---|
| 125 | subs_vertical_gradient_level(i) >= 0.0_wp ) THEN |
|---|
| 126 | gradient = subs_vertical_gradient(i) / 100.0_wp |
|---|
| 127 | subs_vertical_gradient_level_i(i) = k - 1 |
|---|
| 128 | i = i + 1 |
|---|
| 129 | ENDIF |
|---|
| 130 | ENDIF |
|---|
| 131 | IF ( gradient /= 0.0_wp ) THEN |
|---|
| 132 | IF ( k /= 1 ) THEN |
|---|
| 133 | w_subs(k) = w_subs(k-1) + dzu(k) * gradient |
|---|
| 134 | ELSE |
|---|
| 135 | w_subs(k) = ws_surface + 0.5_wp * dzu(k) * gradient |
|---|
| 136 | ENDIF |
|---|
| 137 | ELSE |
|---|
| 138 | w_subs(k) = w_subs(k-1) |
|---|
| 139 | ENDIF |
|---|
| 140 | ENDDO |
|---|
| 141 | |
|---|
| 142 | ! |
|---|
| 143 | !-- In case of no given gradients for the subsidence/ascent velocity, choose zero gradient |
|---|
| 144 | IF ( subs_vertical_gradient_level(1) == -9999999.9_wp ) THEN |
|---|
| 145 | subs_vertical_gradient_level(1) = 0.0_wp |
|---|
| 146 | ENDIF |
|---|
| 147 | |
|---|
| 148 | END SUBROUTINE init_w_subsidence |
|---|
| 149 | |
|---|
| 150 | |
|---|
| 151 | !--------------------------------------------------------------------------------------------------! |
|---|
| 152 | ! Description: |
|---|
| 153 | ! ------------ |
|---|
| 154 | !> Add effect of large-scale subsidence to variable. |
|---|
| 155 | !--------------------------------------------------------------------------------------------------! |
|---|
| 156 | SUBROUTINE subsidence( tendency, var, var_init, ls_index ) |
|---|
| 157 | |
|---|
| 158 | USE arrays_3d, & |
|---|
| 159 | ONLY: ddzu, & |
|---|
| 160 | w_subs |
|---|
| 161 | |
|---|
| 162 | USE control_parameters, & |
|---|
| 163 | ONLY: dt_3d, & |
|---|
| 164 | intermediate_timestep_count, & |
|---|
| 165 | large_scale_forcing, & |
|---|
| 166 | scalar_rayleigh_damping |
|---|
| 167 | |
|---|
| 168 | USE indices, & |
|---|
| 169 | ONLY: nxl, & |
|---|
| 170 | nxlg, & |
|---|
| 171 | nxr, & |
|---|
| 172 | nxrg, & |
|---|
| 173 | nyn, & |
|---|
| 174 | nyng, & |
|---|
| 175 | nys, & |
|---|
| 176 | nysg, & |
|---|
| 177 | nzb, & |
|---|
| 178 | nzt, & |
|---|
| 179 | wall_flags_total_0 |
|---|
| 180 | |
|---|
| 181 | USE kinds |
|---|
| 182 | |
|---|
| 183 | USE statistics, & |
|---|
| 184 | ONLY: sums_ls_l, & |
|---|
| 185 | weight_substep |
|---|
| 186 | |
|---|
| 187 | IMPLICIT NONE |
|---|
| 188 | |
|---|
| 189 | INTEGER(iwp) :: i !< loop index |
|---|
| 190 | INTEGER(iwp) :: j !< loop index |
|---|
| 191 | INTEGER(iwp) :: k !< loop index |
|---|
| 192 | INTEGER(iwp) :: ls_index !< index of large-scale subsidence in sums_ls_l |
|---|
| 193 | |
|---|
| 194 | REAL(wp) :: tmp_tend !< temporary tendency |
|---|
| 195 | REAL(wp) :: tmp_grad !< temporary gradient |
|---|
| 196 | |
|---|
| 197 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !< variable where to add subsidence |
|---|
| 198 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: tendency !< tendency of var |
|---|
| 199 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_init !< initialization profile of var |
|---|
| 200 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_mod !< modified profile of var |
|---|
| 201 | |
|---|
| 202 | var_mod = var_init |
|---|
| 203 | |
|---|
| 204 | ! |
|---|
| 205 | !-- Influence of w_subsidence on the current tendency term |
|---|
| 206 | DO i = nxl, nxr |
|---|
| 207 | DO j = nys, nyn |
|---|
| 208 | |
|---|
| 209 | DO k = nzb+1, nzt |
|---|
| 210 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
|---|
| 211 | tmp_tend = - w_subs(k) * ( var(k+1,j,i) - var(k,j,i) ) * ddzu(k+1) * & |
|---|
| 212 | MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 0 ) ) |
|---|
| 213 | ELSE ! large-scale ascent |
|---|
| 214 | tmp_tend = - w_subs(k) * ( var(k,j,i) - var(k-1,j,i) ) * ddzu(k) * & |
|---|
| 215 | MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 0 ) ) |
|---|
| 216 | ENDIF |
|---|
| 217 | |
|---|
| 218 | tendency(k,j,i) = tendency(k,j,i) + tmp_tend |
|---|
| 219 | |
|---|
| 220 | IF ( large_scale_forcing ) THEN |
|---|
| 221 | sums_ls_l(k,ls_index) = sums_ls_l(k,ls_index) + tmp_tend & |
|---|
| 222 | * weight_substep(intermediate_timestep_count) & |
|---|
| 223 | * MERGE( 1.0_wp, 0.0_wp, & |
|---|
| 224 | BTEST( wall_flags_total_0(k,j,i), 0 ) ) |
|---|
| 225 | ENDIF |
|---|
| 226 | ENDDO |
|---|
| 227 | |
|---|
| 228 | IF ( large_scale_forcing ) THEN |
|---|
| 229 | sums_ls_l(nzt+1,ls_index) = sums_ls_l(nzt,ls_index) |
|---|
| 230 | ENDIF |
|---|
| 231 | |
|---|
| 232 | ENDDO |
|---|
| 233 | ENDDO |
|---|
| 234 | |
|---|
| 235 | ! |
|---|
| 236 | !-- Shifting of the initial profile is especially necessary with Rayleigh damping switched on |
|---|
| 237 | IF ( scalar_rayleigh_damping .AND. intermediate_timestep_count == 1 ) THEN |
|---|
| 238 | DO k = nzb, nzt |
|---|
| 239 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
|---|
| 240 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
|---|
| 241 | ( var_init(k+1) - var_init(k) ) * ddzu(k+1) |
|---|
| 242 | ENDIF |
|---|
| 243 | ENDDO |
|---|
| 244 | ! |
|---|
| 245 | !-- At the upper boundary, the initial profile is shifted with aid of the gradient tmp_grad. |
|---|
| 246 | !-- (This is ok if the gradients are linear.) |
|---|
| 247 | IF ( w_subs(nzt) < 0.0_wp ) THEN |
|---|
| 248 | tmp_grad = ( var_init(nzt+1) - var_init(nzt) ) * ddzu(nzt+1) |
|---|
| 249 | var_mod(nzt+1) = var_init(nzt+1) - dt_3d * w_subs(nzt+1) * tmp_grad |
|---|
| 250 | ENDIF |
|---|
| 251 | |
|---|
| 252 | |
|---|
| 253 | DO k = nzt+1, nzb+1, -1 |
|---|
| 254 | IF ( w_subs(k) >= 0.0_wp ) THEN ! large-scale ascent |
|---|
| 255 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
|---|
| 256 | ( var_init(k) - var_init(k-1) ) * ddzu(k) |
|---|
| 257 | ENDIF |
|---|
| 258 | ENDDO |
|---|
| 259 | ! |
|---|
| 260 | !-- At the lower boundary shifting is not necessary because the subsidence velocity w_subs(nzb) |
|---|
| 261 | !-- vanishes. |
|---|
| 262 | IF ( w_subs(nzb+1) >= 0.0_wp ) THEN |
|---|
| 263 | var_mod(nzb) = var_init(nzb) |
|---|
| 264 | ENDIF |
|---|
| 265 | |
|---|
| 266 | var_init = var_mod |
|---|
| 267 | ENDIF |
|---|
| 268 | |
|---|
| 269 | |
|---|
| 270 | END SUBROUTINE subsidence |
|---|
| 271 | |
|---|
| 272 | !--------------------------------------------------------------------------------------------------! |
|---|
| 273 | ! Description: |
|---|
| 274 | ! ------------ |
|---|
| 275 | !> Add effect of large-scale subsidence to variable. |
|---|
| 276 | !--------------------------------------------------------------------------------------------------! |
|---|
| 277 | SUBROUTINE subsidence_ij( i, j, tendency, var, var_init, ls_index ) |
|---|
| 278 | |
|---|
| 279 | USE arrays_3d, & |
|---|
| 280 | ONLY: ddzu, & |
|---|
| 281 | w_subs |
|---|
| 282 | |
|---|
| 283 | USE control_parameters, & |
|---|
| 284 | ONLY: dt_3d, & |
|---|
| 285 | intermediate_timestep_count, & |
|---|
| 286 | large_scale_forcing, & |
|---|
| 287 | scalar_rayleigh_damping |
|---|
| 288 | |
|---|
| 289 | USE indices, & |
|---|
| 290 | ONLY: nxl, & |
|---|
| 291 | nxlg, & |
|---|
| 292 | nxrg, & |
|---|
| 293 | nyng, & |
|---|
| 294 | nys, & |
|---|
| 295 | nysg, & |
|---|
| 296 | nzb, & |
|---|
| 297 | nzt, & |
|---|
| 298 | wall_flags_total_0 |
|---|
| 299 | |
|---|
| 300 | USE kinds |
|---|
| 301 | |
|---|
| 302 | USE statistics, & |
|---|
| 303 | ONLY: sums_ls_l, & |
|---|
| 304 | weight_substep |
|---|
| 305 | |
|---|
| 306 | IMPLICIT NONE |
|---|
| 307 | |
|---|
| 308 | INTEGER(iwp) :: i !< loop variable |
|---|
| 309 | INTEGER(iwp) :: j !< loop variable |
|---|
| 310 | INTEGER(iwp) :: k !< loop variable |
|---|
| 311 | INTEGER(iwp) :: ls_index !< index of large-scale subsidence in sums_ls_l |
|---|
| 312 | |
|---|
| 313 | REAL(wp) :: tmp_tend !< temporary tendency |
|---|
| 314 | REAL(wp) :: tmp_grad !< temporary gradient |
|---|
| 315 | |
|---|
| 316 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !< variable where to add subsidence |
|---|
| 317 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: tendency !< tendency of var |
|---|
| 318 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_init !< initialization profile of var |
|---|
| 319 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_mod !< modified profile of var |
|---|
| 320 | |
|---|
| 321 | var_mod = var_init |
|---|
| 322 | |
|---|
| 323 | ! |
|---|
| 324 | !-- Influence of w_subsidence on the current tendency term |
|---|
| 325 | DO k = nzb+1, nzt |
|---|
| 326 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
|---|
| 327 | tmp_tend = - w_subs(k) * ( var(k+1,j,i) - var(k,j,i) ) * ddzu(k+1) & |
|---|
| 328 | * MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 0 ) ) |
|---|
| 329 | ELSE ! large-scale ascent |
|---|
| 330 | tmp_tend = - w_subs(k) * ( var(k,j,i) - var(k-1,j,i) ) * ddzu(k) & |
|---|
| 331 | * MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 0 ) ) |
|---|
| 332 | ENDIF |
|---|
| 333 | |
|---|
| 334 | tendency(k,j,i) = tendency(k,j,i) + tmp_tend |
|---|
| 335 | |
|---|
| 336 | IF ( large_scale_forcing ) THEN |
|---|
| 337 | sums_ls_l(k,ls_index) = sums_ls_l(k,ls_index) + tmp_tend & |
|---|
| 338 | * weight_substep(intermediate_timestep_count) & |
|---|
| 339 | * MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 0 ) ) |
|---|
| 340 | ENDIF |
|---|
| 341 | ENDDO |
|---|
| 342 | |
|---|
| 343 | IF ( large_scale_forcing ) THEN |
|---|
| 344 | sums_ls_l(nzt+1,ls_index) = sums_ls_l(nzt,ls_index) |
|---|
| 345 | ENDIF |
|---|
| 346 | |
|---|
| 347 | ! |
|---|
| 348 | !-- Shifting of the initial profile is especially necessary with Rayleigh damping switched on |
|---|
| 349 | IF ( scalar_rayleigh_damping .AND. intermediate_timestep_count == 1 ) THEN |
|---|
| 350 | IF ( i == nxl .AND. j == nys ) THEN ! shifting only once per PE |
|---|
| 351 | |
|---|
| 352 | DO k = nzb, nzt |
|---|
| 353 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
|---|
| 354 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
|---|
| 355 | ( var_init(k+1) - var_init(k) ) * ddzu(k+1) |
|---|
| 356 | ENDIF |
|---|
| 357 | ENDDO |
|---|
| 358 | ! |
|---|
| 359 | !-- At the upper boundary, the initial profile is shifted with aid of the gradient |
|---|
| 360 | !-- tmp_grad. (This is ok if the gradients are linear.) |
|---|
| 361 | IF ( w_subs(nzt) < 0.0_wp ) THEN |
|---|
| 362 | tmp_grad = ( var_init(nzt+1) - var_init(nzt) ) * ddzu(nzt+1) |
|---|
| 363 | var_mod(nzt+1) = var_init(nzt+1) - dt_3d * w_subs(nzt+1) * tmp_grad |
|---|
| 364 | ENDIF |
|---|
| 365 | |
|---|
| 366 | |
|---|
| 367 | DO k = nzt+1, nzb+1, -1 |
|---|
| 368 | IF ( w_subs(k) >= 0.0_wp ) THEN ! large-scale ascent |
|---|
| 369 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
|---|
| 370 | ( var_init(k) - var_init(k-1) ) * ddzu(k) |
|---|
| 371 | ENDIF |
|---|
| 372 | ENDDO |
|---|
| 373 | ! |
|---|
| 374 | !-- At the lower boundary shifting is not necessary because the subsidence velocity |
|---|
| 375 | !-- w_subs(nzb) vanishes. |
|---|
| 376 | IF ( w_subs(nzb+1) >= 0.0_wp ) THEN |
|---|
| 377 | var_mod(nzb) = var_init(nzb) |
|---|
| 378 | ENDIF |
|---|
| 379 | |
|---|
| 380 | var_init = var_mod |
|---|
| 381 | |
|---|
| 382 | ENDIF |
|---|
| 383 | ENDIF |
|---|
| 384 | |
|---|
| 385 | END SUBROUTINE subsidence_ij |
|---|
| 386 | |
|---|
| 387 | |
|---|
| 388 | END MODULE subsidence_mod |
|---|
