[1850] | 1 | !> @file subsidence_mod.f90 |
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[2000] | 2 | !------------------------------------------------------------------------------! |
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[2696] | 3 | ! This file is part of the PALM model system. |
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[1036] | 4 | ! |
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[2000] | 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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[1036] | 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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[3655] | 17 | ! Copyright 1997-2019 Leibniz Universitaet Hannover |
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[2000] | 18 | !------------------------------------------------------------------------------! |
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[1036] | 19 | ! |
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[411] | 20 | ! Current revisions: |
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| 21 | ! ----------------- |
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[1683] | 22 | ! |
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[2233] | 23 | ! |
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[1383] | 24 | ! Former revisions: |
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| 25 | ! ----------------- |
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| 26 | ! $Id: subsidence_mod.f90 4180 2019-08-21 14:37:54Z scharf $ |
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[3554] | 27 | ! add subroutine and variable description |
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| 28 | ! |
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[1383] | 29 | ! |
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[411] | 30 | ! Description: |
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| 31 | ! ------------ |
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[1682] | 32 | !> Impact of large-scale subsidence or ascent as tendency term for use |
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| 33 | !> in the prognostic equation of potential temperature. This enables the |
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| 34 | !> construction of a constant boundary layer height z_i with time. |
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[411] | 35 | !-----------------------------------------------------------------------------! |
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[1682] | 36 | MODULE subsidence_mod |
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| 37 | |
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[411] | 38 | |
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| 39 | |
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| 40 | IMPLICIT NONE |
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| 41 | |
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| 42 | PRIVATE |
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| 43 | PUBLIC init_w_subsidence, subsidence |
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| 44 | |
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| 45 | INTERFACE init_w_subsidence |
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| 46 | MODULE PROCEDURE init_w_subsidence |
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| 47 | END INTERFACE init_w_subsidence |
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| 48 | |
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| 49 | INTERFACE subsidence |
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| 50 | MODULE PROCEDURE subsidence |
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| 51 | MODULE PROCEDURE subsidence_ij |
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| 52 | END INTERFACE subsidence |
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| 53 | |
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| 54 | CONTAINS |
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| 55 | |
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[1682] | 56 | !------------------------------------------------------------------------------! |
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| 57 | ! Description: |
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| 58 | ! ------------ |
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[3554] | 59 | !> Initialize vertical subsidence velocity w_subs. |
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[1682] | 60 | !------------------------------------------------------------------------------! |
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[411] | 61 | SUBROUTINE init_w_subsidence |
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| 62 | |
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[1320] | 63 | USE arrays_3d, & |
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| 64 | ONLY: dzu, w_subs, zu |
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[411] | 65 | |
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[1320] | 66 | USE control_parameters, & |
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[3294] | 67 | ONLY: message_string, ocean_mode, subs_vertical_gradient, & |
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[1320] | 68 | subs_vertical_gradient_level, subs_vertical_gradient_level_i |
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| 69 | |
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| 70 | USE indices, & |
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| 71 | ONLY: nzb, nzt |
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| 72 | |
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| 73 | USE kinds |
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| 74 | |
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[411] | 75 | IMPLICIT NONE |
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| 76 | |
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[3554] | 77 | INTEGER(iwp) :: i !< loop index |
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| 78 | INTEGER(iwp) :: k !< loop index |
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[411] | 79 | |
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[3554] | 80 | REAL(wp) :: gradient !< vertical gradient of subsidence velocity |
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| 81 | REAL(wp) :: ws_surface !< subsidence velocity at the surface |
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[1320] | 82 | |
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[1862] | 83 | IF ( .NOT. ALLOCATED( w_subs ) ) THEN |
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[411] | 84 | ALLOCATE( w_subs(nzb:nzt+1) ) |
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[1353] | 85 | w_subs = 0.0_wp |
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[411] | 86 | ENDIF |
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| 87 | |
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[3294] | 88 | IF ( ocean_mode ) THEN |
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[3302] | 89 | message_string = 'applying large scale vertical motion is not ' // & |
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[3294] | 90 | 'allowed for ocean mode' |
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[411] | 91 | CALL message( 'init_w_subsidence', 'PA0324', 2, 2, 0, 6, 0 ) |
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| 92 | ENDIF |
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| 93 | |
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| 94 | ! |
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| 95 | !-- Compute the profile of the subsidence/ascent velocity |
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| 96 | !-- using the given gradients |
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| 97 | i = 1 |
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[1353] | 98 | gradient = 0.0_wp |
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| 99 | ws_surface = 0.0_wp |
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[411] | 100 | |
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| 101 | |
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[580] | 102 | subs_vertical_gradient_level_i(1) = 0 |
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[411] | 103 | DO k = 1, nzt+1 |
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[1365] | 104 | IF ( i < 11 ) THEN |
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[580] | 105 | IF ( subs_vertical_gradient_level(i) < zu(k) .AND. & |
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[1353] | 106 | subs_vertical_gradient_level(i) >= 0.0_wp ) THEN |
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| 107 | gradient = subs_vertical_gradient(i) / 100.0_wp |
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[580] | 108 | subs_vertical_gradient_level_i(i) = k - 1 |
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[411] | 109 | i = i + 1 |
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| 110 | ENDIF |
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| 111 | ENDIF |
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[1353] | 112 | IF ( gradient /= 0.0_wp ) THEN |
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[411] | 113 | IF ( k /= 1 ) THEN |
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| 114 | w_subs(k) = w_subs(k-1) + dzu(k) * gradient |
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| 115 | ELSE |
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[1353] | 116 | w_subs(k) = ws_surface + 0.5_wp * dzu(k) * gradient |
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[411] | 117 | ENDIF |
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| 118 | ELSE |
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| 119 | w_subs(k) = w_subs(k-1) |
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| 120 | ENDIF |
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| 121 | ENDDO |
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| 122 | |
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| 123 | ! |
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| 124 | !-- In case of no given gradients for the subsidence/ascent velocity, |
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| 125 | !-- choose zero gradient |
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[1353] | 126 | IF ( subs_vertical_gradient_level(1) == -9999999.9_wp ) THEN |
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| 127 | subs_vertical_gradient_level(1) = 0.0_wp |
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[411] | 128 | ENDIF |
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| 129 | |
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| 130 | END SUBROUTINE init_w_subsidence |
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| 131 | |
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| 132 | |
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[1682] | 133 | !------------------------------------------------------------------------------! |
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| 134 | ! Description: |
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| 135 | ! ------------ |
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[3554] | 136 | !> Add effect of large-scale subsidence to variable. |
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[1682] | 137 | !------------------------------------------------------------------------------! |
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[1365] | 138 | SUBROUTINE subsidence( tendency, var, var_init, ls_index ) |
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[411] | 139 | |
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[1320] | 140 | USE arrays_3d, & |
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| 141 | ONLY: ddzu, w_subs |
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[411] | 142 | |
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[1320] | 143 | USE control_parameters, & |
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[1380] | 144 | ONLY: dt_3d, intermediate_timestep_count, large_scale_forcing, & |
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| 145 | scalar_rayleigh_damping |
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[1320] | 146 | |
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| 147 | USE indices, & |
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[2232] | 148 | ONLY: nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt, & |
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| 149 | wall_flags_0 |
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[1320] | 150 | |
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| 151 | USE kinds |
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| 152 | |
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[1365] | 153 | USE statistics, & |
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[1382] | 154 | ONLY: sums_ls_l, weight_substep |
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[1365] | 155 | |
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[411] | 156 | IMPLICIT NONE |
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| 157 | |
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[3554] | 158 | INTEGER(iwp) :: i !< loop index |
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| 159 | INTEGER(iwp) :: j !< loop index |
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| 160 | INTEGER(iwp) :: k !< loop index |
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| 161 | INTEGER(iwp) :: ls_index !< index of large-scale subsidence in sums_ls_l |
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[411] | 162 | |
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[3554] | 163 | REAL(wp) :: tmp_tend !< temporary tendency |
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| 164 | REAL(wp) :: tmp_grad !< temporary gradient |
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[411] | 165 | |
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[3554] | 166 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !< variable where to add subsidence |
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| 167 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: tendency !< tendency of var |
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| 168 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_init !< initialization profile of var |
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| 169 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_mod !< modified profile of var |
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[411] | 170 | |
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[464] | 171 | var_mod = var_init |
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[411] | 172 | |
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| 173 | ! |
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| 174 | !-- Influence of w_subsidence on the current tendency term |
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| 175 | DO i = nxl, nxr |
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| 176 | DO j = nys, nyn |
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[1382] | 177 | |
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[2232] | 178 | DO k = nzb+1, nzt |
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[1365] | 179 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
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| 180 | tmp_tend = - w_subs(k) * & |
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[2232] | 181 | ( var(k+1,j,i) - var(k,j,i) ) * ddzu(k+1) * & |
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| 182 | MERGE( 1.0_wp, 0.0_wp, & |
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| 183 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[1365] | 184 | ELSE ! large-scale ascent |
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| 185 | tmp_tend = - w_subs(k) * & |
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[2232] | 186 | ( var(k,j,i) - var(k-1,j,i) ) * ddzu(k) * & |
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| 187 | MERGE( 1.0_wp, 0.0_wp, & |
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| 188 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[411] | 189 | ENDIF |
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[1365] | 190 | |
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| 191 | tendency(k,j,i) = tendency(k,j,i) + tmp_tend |
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| 192 | |
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| 193 | IF ( large_scale_forcing ) THEN |
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| 194 | sums_ls_l(k,ls_index) = sums_ls_l(k,ls_index) + tmp_tend & |
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[2232] | 195 | * weight_substep(intermediate_timestep_count) & |
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| 196 | * MERGE( 1.0_wp, 0.0_wp, & |
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| 197 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[1365] | 198 | ENDIF |
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[411] | 199 | ENDDO |
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[1382] | 200 | |
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[1862] | 201 | IF ( large_scale_forcing ) THEN |
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| 202 | sums_ls_l(nzt+1,ls_index) = sums_ls_l(nzt,ls_index) |
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| 203 | ENDIF |
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[1382] | 204 | |
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[411] | 205 | ENDDO |
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| 206 | ENDDO |
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| 207 | |
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| 208 | ! |
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| 209 | !-- Shifting of the initial profile is especially necessary with Rayleigh |
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| 210 | !-- damping switched on |
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[1729] | 211 | IF ( scalar_rayleigh_damping .AND. & |
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| 212 | intermediate_timestep_count == 1 ) THEN |
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[1380] | 213 | DO k = nzb, nzt |
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| 214 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
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| 215 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
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| 216 | ( var_init(k+1) - var_init(k) ) * ddzu(k+1) |
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| 217 | ENDIF |
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| 218 | ENDDO |
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[411] | 219 | ! |
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[1380] | 220 | !-- At the upper boundary, the initial profile is shifted with aid of |
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| 221 | !-- the gradient tmp_grad. (This is ok if the gradients are linear.) |
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| 222 | IF ( w_subs(nzt) < 0.0_wp ) THEN |
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| 223 | tmp_grad = ( var_init(nzt+1) - var_init(nzt) ) * ddzu(nzt+1) |
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| 224 | var_mod(nzt+1) = var_init(nzt+1) - & |
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| 225 | dt_3d * w_subs(nzt+1) * tmp_grad |
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| 226 | ENDIF |
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[411] | 227 | |
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| 228 | |
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[1380] | 229 | DO k = nzt+1, nzb+1, -1 |
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| 230 | IF ( w_subs(k) >= 0.0_wp ) THEN ! large-scale ascent |
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| 231 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
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| 232 | ( var_init(k) - var_init(k-1) ) * ddzu(k) |
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| 233 | ENDIF |
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| 234 | ENDDO |
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| 235 | ! |
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| 236 | !-- At the lower boundary shifting is not necessary because the |
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| 237 | !-- subsidence velocity w_subs(nzb) vanishes. |
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| 238 | IF ( w_subs(nzb+1) >= 0.0_wp ) THEN |
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| 239 | var_mod(nzb) = var_init(nzb) |
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[411] | 240 | ENDIF |
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[1380] | 241 | |
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| 242 | var_init = var_mod |
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[411] | 243 | ENDIF |
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| 244 | |
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| 245 | |
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| 246 | END SUBROUTINE subsidence |
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| 247 | |
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[1682] | 248 | !------------------------------------------------------------------------------! |
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| 249 | ! Description: |
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| 250 | ! ------------ |
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[3554] | 251 | !> Add effect of large-scale subsidence to variable. |
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[1682] | 252 | !------------------------------------------------------------------------------! |
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[1365] | 253 | SUBROUTINE subsidence_ij( i, j, tendency, var, var_init, ls_index ) |
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[411] | 254 | |
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[1320] | 255 | USE arrays_3d, & |
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| 256 | ONLY: ddzu, w_subs |
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[411] | 257 | |
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[1320] | 258 | USE control_parameters, & |
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[1380] | 259 | ONLY: dt_3d, intermediate_timestep_count, large_scale_forcing, & |
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| 260 | scalar_rayleigh_damping |
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[1320] | 261 | |
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| 262 | USE indices, & |
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[2232] | 263 | ONLY: nxl, nxlg, nxrg, nyng, nys, nysg, nzb, nzt, wall_flags_0 |
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[1320] | 264 | |
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| 265 | USE kinds |
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| 266 | |
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[1365] | 267 | USE statistics, & |
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[1382] | 268 | ONLY: sums_ls_l, weight_substep |
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[1365] | 269 | |
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[411] | 270 | IMPLICIT NONE |
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| 271 | |
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[3554] | 272 | INTEGER(iwp) :: i !< loop variable |
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| 273 | INTEGER(iwp) :: j !< loop variable |
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| 274 | INTEGER(iwp) :: k !< loop variable |
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| 275 | INTEGER(iwp) :: ls_index !< index of large-scale subsidence in sums_ls_l |
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[411] | 276 | |
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[3554] | 277 | REAL(wp) :: tmp_tend !< temporary tendency |
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| 278 | REAL(wp) :: tmp_grad !< temporary gradient |
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[411] | 279 | |
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[3554] | 280 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: var !< variable where to add subsidence |
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| 281 | REAL(wp), DIMENSION(nzb:nzt+1,nysg:nyng,nxlg:nxrg) :: tendency !< tendency of var |
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| 282 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_init !< initialization profile of var |
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| 283 | REAL(wp), DIMENSION(nzb:nzt+1) :: var_mod !< modified profile of var |
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[411] | 284 | |
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[464] | 285 | var_mod = var_init |
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[411] | 286 | |
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| 287 | ! |
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| 288 | !-- Influence of w_subsidence on the current tendency term |
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[2232] | 289 | DO k = nzb+1, nzt |
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[1365] | 290 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
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[2232] | 291 | tmp_tend = - w_subs(k) * ( var(k+1,j,i) - var(k,j,i) ) & |
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| 292 | * ddzu(k+1) & |
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| 293 | * MERGE( 1.0_wp, 0.0_wp, & |
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| 294 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[1365] | 295 | ELSE ! large-scale ascent |
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[2232] | 296 | tmp_tend = - w_subs(k) * ( var(k,j,i) - var(k-1,j,i) ) * ddzu(k) & |
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| 297 | * MERGE( 1.0_wp, 0.0_wp, & |
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| 298 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[411] | 299 | ENDIF |
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[1365] | 300 | |
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| 301 | tendency(k,j,i) = tendency(k,j,i) + tmp_tend |
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| 302 | |
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| 303 | IF ( large_scale_forcing ) THEN |
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| 304 | sums_ls_l(k,ls_index) = sums_ls_l(k,ls_index) + tmp_tend & |
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[2232] | 305 | * weight_substep(intermediate_timestep_count)& |
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| 306 | * MERGE( 1.0_wp, 0.0_wp, & |
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| 307 | BTEST( wall_flags_0(k,j,i), 0 ) ) |
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[1365] | 308 | ENDIF |
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[411] | 309 | ENDDO |
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| 310 | |
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[1489] | 311 | IF ( large_scale_forcing ) THEN |
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| 312 | sums_ls_l(nzt+1,ls_index) = sums_ls_l(nzt,ls_index) |
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| 313 | ENDIF |
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[411] | 314 | |
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| 315 | ! |
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| 316 | !-- Shifting of the initial profile is especially necessary with Rayleigh |
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| 317 | !-- damping switched on |
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[1729] | 318 | IF ( scalar_rayleigh_damping .AND. & |
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| 319 | intermediate_timestep_count == 1 ) THEN |
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[1380] | 320 | IF ( i == nxl .AND. j == nys ) THEN ! shifting only once per PE |
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[411] | 321 | |
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[1380] | 322 | DO k = nzb, nzt |
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| 323 | IF ( w_subs(k) < 0.0_wp ) THEN ! large-scale subsidence |
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| 324 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
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| 325 | ( var_init(k+1) - var_init(k) ) * ddzu(k+1) |
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| 326 | ENDIF |
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| 327 | ENDDO |
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| 328 | ! |
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| 329 | !-- At the upper boundary, the initial profile is shifted with aid of |
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| 330 | !-- the gradient tmp_grad. (This is ok if the gradients are linear.) |
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| 331 | IF ( w_subs(nzt) < 0.0_wp ) THEN |
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| 332 | tmp_grad = ( var_init(nzt+1) - var_init(nzt) ) * ddzu(nzt+1) |
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| 333 | var_mod(nzt+1) = var_init(nzt+1) - & |
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| 334 | dt_3d * w_subs(nzt+1) * tmp_grad |
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[411] | 335 | ENDIF |
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| 336 | |
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| 337 | |
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[1380] | 338 | DO k = nzt+1, nzb+1, -1 |
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| 339 | IF ( w_subs(k) >= 0.0_wp ) THEN ! large-scale ascent |
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| 340 | var_mod(k) = var_init(k) - dt_3d * w_subs(k) * & |
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| 341 | ( var_init(k) - var_init(k-1) ) * ddzu(k) |
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| 342 | ENDIF |
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| 343 | ENDDO |
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| 344 | ! |
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| 345 | !-- At the lower boundary shifting is not necessary because the |
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| 346 | !-- subsidence velocity w_subs(nzb) vanishes. |
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| 347 | IF ( w_subs(nzb+1) >= 0.0_wp ) THEN |
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| 348 | var_mod(nzb) = var_init(nzb) |
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[411] | 349 | ENDIF |
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| 350 | |
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[1380] | 351 | var_init = var_mod |
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[411] | 352 | |
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[1380] | 353 | ENDIF |
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[411] | 354 | ENDIF |
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| 355 | |
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| 356 | END SUBROUTINE subsidence_ij |
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| 357 | |
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| 358 | |
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| 359 | END MODULE subsidence_mod |
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