[1] | 1 | SUBROUTINE init_slope |
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| 2 | |
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[1036] | 3 | !--------------------------------------------------------------------------------! |
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| 4 | ! This file is part of PALM. |
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| 5 | ! |
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| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 8 | ! either version 3 of the License, or (at your option) any later 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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[1310] | 17 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
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[1036] | 18 | !--------------------------------------------------------------------------------! |
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| 19 | ! |
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[484] | 20 | ! Current revisions: |
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[1] | 21 | ! ----------------- |
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[1321] | 22 | ! |
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| 23 | ! Former revisions: |
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| 24 | ! ----------------- |
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| 25 | ! $Id: init_slope.f90 1321 2014-03-20 09:40:40Z raasch $ |
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| 26 | ! |
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| 27 | ! 1320 2014-03-20 08:40:49Z raasch |
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[1320] | 28 | ! ONLY-attribute added to USE-statements, |
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| 29 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 30 | ! kinds are defined in new module kinds, |
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| 31 | ! revision history before 2012 removed, |
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| 32 | ! comment fields (!:) to be used for variable explanations added to |
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| 33 | ! all variable declaration statements |
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[1] | 34 | ! |
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[1037] | 35 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 36 | ! code put under GPL (PALM 3.9) |
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| 37 | ! |
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[1] | 38 | ! Revision 1.1 2000/04/27 07:06:24 raasch |
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| 39 | ! Initial revision |
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| 40 | ! |
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| 41 | ! |
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| 42 | ! Description: |
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| 43 | ! ------------ |
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| 44 | ! Initialization of the temperature field and other variables used in case |
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| 45 | ! of a sloping surface. |
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| 46 | ! Remember: when a sloping surface is used, only one constant temperature |
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| 47 | ! gradient is allowed! |
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[3] | 48 | !------------------------------------------------------------------------------! |
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[1] | 49 | |
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[1320] | 50 | USE arrays_3d, & |
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| 51 | ONLY: pt, pt_init, pt_slope_ref, zu |
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| 52 | |
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| 53 | USE constants, & |
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| 54 | ONLY: pi |
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| 55 | |
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| 56 | USE control_parameters, & |
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| 57 | ONLY: alpha_surface, initializing_actions, pt_slope_offset, & |
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| 58 | pt_surface, pt_vertical_gradient, sin_alpha_surface |
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| 59 | |
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| 60 | USE grid_variables, & |
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| 61 | ONLY: dx |
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| 62 | |
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| 63 | USE indices, & |
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| 64 | ONLY: ngp_2dh, nx, nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt |
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| 65 | |
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| 66 | USE kinds |
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| 67 | |
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[1] | 68 | USE pegrid |
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| 69 | |
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[1320] | 70 | |
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[1] | 71 | IMPLICIT NONE |
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| 72 | |
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[1320] | 73 | INTEGER(iwp) :: i !: |
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| 74 | INTEGER(iwp) :: j !: |
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| 75 | INTEGER(iwp) :: k !: |
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| 76 | |
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| 77 | REAL(wp) :: alpha !: |
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| 78 | REAL(wp) :: height !: |
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| 79 | REAL(wp) :: pt_value !: |
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| 80 | REAL(wp) :: radius !: |
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| 81 | |
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| 82 | REAL(wp), DIMENSION(:), ALLOCATABLE :: pt_init_local !: |
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[1] | 83 | |
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| 84 | ! |
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| 85 | !-- Calculate reference temperature field needed for computing buoyancy |
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[667] | 86 | ALLOCATE( pt_slope_ref(nzb:nzt+1,nxlg:nxrg) ) |
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[1] | 87 | |
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[667] | 88 | DO i = nxlg, nxrg |
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[1] | 89 | DO k = nzb, nzt+1 |
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| 90 | |
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| 91 | ! |
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| 92 | !-- Compute height of grid-point relative to lower left corner of |
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| 93 | !-- the total domain. |
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| 94 | !-- First compute the distance between the actual grid point and the |
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| 95 | !-- lower left corner as well as the angle between the line connecting |
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| 96 | !-- these points and the bottom of the model. |
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| 97 | IF ( k /= nzb ) THEN |
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| 98 | radius = SQRT( ( i * dx )**2 + zu(k)**2 ) |
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| 99 | height = zu(k) |
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| 100 | ELSE |
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| 101 | radius = SQRT( ( i * dx )**2 ) |
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| 102 | height = 0.0 |
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| 103 | ENDIF |
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| 104 | IF ( radius /= 0.0 ) THEN |
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| 105 | alpha = ASIN( height / radius ) |
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| 106 | ELSE |
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| 107 | alpha = 0.0 |
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| 108 | ENDIF |
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| 109 | ! |
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| 110 | !-- Compute temperatures in the rotated coordinate system |
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| 111 | alpha = alpha + alpha_surface / 180.0 * pi |
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| 112 | pt_value = pt_surface + radius * SIN( alpha ) * & |
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| 113 | pt_vertical_gradient(1) / 100.0 |
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| 114 | pt_slope_ref(k,i) = pt_value |
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| 115 | ENDDO |
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| 116 | ENDDO |
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| 117 | |
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| 118 | ! |
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| 119 | !-- Temperature difference between left and right boundary of the total domain, |
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| 120 | !-- used for the cyclic boundary in x-direction |
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| 121 | pt_slope_offset = (nx+1) * dx * sin_alpha_surface * & |
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| 122 | pt_vertical_gradient(1) / 100.0 |
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| 123 | |
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| 124 | |
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| 125 | ! |
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| 126 | !-- Following action must only be executed for initial runs |
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| 127 | IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN |
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| 128 | ! |
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| 129 | !-- Set initial temperature equal to the reference temperature field |
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[667] | 130 | DO j = nysg, nyng |
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[1] | 131 | pt(:,j,:) = pt_slope_ref |
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| 132 | ENDDO |
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| 133 | |
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| 134 | ! |
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| 135 | !-- Recompute the mean initial temperature profile (mean along x-direction of |
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| 136 | !-- the rotated coordinate system) |
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| 137 | ALLOCATE( pt_init_local(nzb:nzt+1) ) |
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| 138 | pt_init_local = 0.0 |
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| 139 | DO i = nxl, nxr |
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| 140 | DO j = nys, nyn |
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| 141 | DO k = nzb, nzt+1 |
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| 142 | pt_init_local(k) = pt_init_local(k) + pt(k,j,i) |
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| 143 | ENDDO |
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| 144 | ENDDO |
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[622] | 145 | ENDDO |
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[1] | 146 | |
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| 147 | #if defined( __parallel ) |
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[622] | 148 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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| 149 | CALL MPI_ALLREDUCE( pt_init_local, pt_init, nzt+2-nzb, MPI_REAL, & |
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| 150 | MPI_SUM, comm2d, ierr ) |
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[1] | 151 | #else |
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[622] | 152 | pt_init = pt_init_local |
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[1] | 153 | #endif |
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| 154 | |
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[622] | 155 | pt_init = pt_init / ngp_2dh(0) |
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| 156 | DEALLOCATE( pt_init_local ) |
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[1] | 157 | |
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[622] | 158 | ENDIF |
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[1] | 159 | |
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| 160 | END SUBROUTINE init_slope |
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