[1] | 1 | SUBROUTINE init_slope |
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| 2 | |
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[3] | 3 | !------------------------------------------------------------------------------! |
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[484] | 4 | ! Current revisions: |
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[1] | 5 | ! ----------------- |
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[623] | 6 | ! |
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[1] | 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ----------------- |
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[3] | 10 | ! $Id: init_slope.f90 623 2010-12-10 08:52:17Z raasch $ |
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[623] | 11 | ! |
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| 12 | ! 622 2010-12-10 08:08:13Z raasch |
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| 13 | ! optional barriers included in order to speed up collective operations |
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| 14 | ! |
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| 15 | ! Feb. 2007 |
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[3] | 16 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 17 | ! |
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[1] | 18 | ! Revision 1.5 2006/02/23 12:35:34 raasch |
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| 19 | ! nanz_2dh renamed ngp_2dh |
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| 20 | ! |
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| 21 | ! Revision 1.1 2000/04/27 07:06:24 raasch |
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| 22 | ! Initial revision |
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| 23 | ! |
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| 24 | ! |
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| 25 | ! Description: |
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| 26 | ! ------------ |
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| 27 | ! Initialization of the temperature field and other variables used in case |
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| 28 | ! of a sloping surface. |
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| 29 | ! Remember: when a sloping surface is used, only one constant temperature |
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| 30 | ! gradient is allowed! |
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[3] | 31 | !------------------------------------------------------------------------------! |
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[1] | 32 | |
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| 33 | USE arrays_3d |
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| 34 | USE constants |
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| 35 | USE grid_variables |
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| 36 | USE indices |
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| 37 | USE pegrid |
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| 38 | USE control_parameters |
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| 39 | |
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| 40 | IMPLICIT NONE |
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| 41 | |
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| 42 | INTEGER :: i, j, k |
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| 43 | REAL :: alpha, height, pt_value, radius |
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| 44 | REAL, DIMENSION(:), ALLOCATABLE :: pt_init_local |
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| 45 | |
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| 46 | ! |
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| 47 | !-- Calculate reference temperature field needed for computing buoyancy |
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| 48 | ALLOCATE( pt_slope_ref(nzb:nzt+1,nxl-1:nxr+1) ) |
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| 49 | |
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| 50 | DO i = nxl-1, nxr+1 |
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| 51 | DO k = nzb, nzt+1 |
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| 52 | |
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| 53 | ! |
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| 54 | !-- Compute height of grid-point relative to lower left corner of |
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| 55 | !-- the total domain. |
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| 56 | !-- First compute the distance between the actual grid point and the |
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| 57 | !-- lower left corner as well as the angle between the line connecting |
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| 58 | !-- these points and the bottom of the model. |
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| 59 | IF ( k /= nzb ) THEN |
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| 60 | radius = SQRT( ( i * dx )**2 + zu(k)**2 ) |
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| 61 | height = zu(k) |
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| 62 | ELSE |
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| 63 | radius = SQRT( ( i * dx )**2 ) |
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| 64 | height = 0.0 |
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| 65 | ENDIF |
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| 66 | IF ( radius /= 0.0 ) THEN |
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| 67 | alpha = ASIN( height / radius ) |
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| 68 | ELSE |
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| 69 | alpha = 0.0 |
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| 70 | ENDIF |
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| 71 | ! |
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| 72 | !-- Compute temperatures in the rotated coordinate system |
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| 73 | alpha = alpha + alpha_surface / 180.0 * pi |
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| 74 | pt_value = pt_surface + radius * SIN( alpha ) * & |
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| 75 | pt_vertical_gradient(1) / 100.0 |
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| 76 | pt_slope_ref(k,i) = pt_value |
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| 77 | ENDDO |
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| 78 | ENDDO |
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| 79 | |
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| 80 | ! |
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| 81 | !-- Temperature difference between left and right boundary of the total domain, |
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| 82 | !-- used for the cyclic boundary in x-direction |
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| 83 | pt_slope_offset = (nx+1) * dx * sin_alpha_surface * & |
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| 84 | pt_vertical_gradient(1) / 100.0 |
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| 85 | |
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| 86 | |
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| 87 | ! |
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| 88 | !-- Following action must only be executed for initial runs |
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| 89 | IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN |
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| 90 | ! |
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| 91 | !-- Set initial temperature equal to the reference temperature field |
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| 92 | DO j = nys-1, nyn+1 |
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| 93 | pt(:,j,:) = pt_slope_ref |
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| 94 | ENDDO |
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| 95 | |
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| 96 | ! |
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| 97 | !-- Recompute the mean initial temperature profile (mean along x-direction of |
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| 98 | !-- the rotated coordinate system) |
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| 99 | ALLOCATE( pt_init_local(nzb:nzt+1) ) |
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| 100 | pt_init_local = 0.0 |
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| 101 | DO i = nxl, nxr |
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| 102 | DO j = nys, nyn |
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| 103 | DO k = nzb, nzt+1 |
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| 104 | pt_init_local(k) = pt_init_local(k) + pt(k,j,i) |
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| 105 | ENDDO |
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| 106 | ENDDO |
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[622] | 107 | ENDDO |
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[1] | 108 | |
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| 109 | #if defined( __parallel ) |
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[622] | 110 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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| 111 | CALL MPI_ALLREDUCE( pt_init_local, pt_init, nzt+2-nzb, MPI_REAL, & |
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| 112 | MPI_SUM, comm2d, ierr ) |
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[1] | 113 | #else |
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[622] | 114 | pt_init = pt_init_local |
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[1] | 115 | #endif |
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| 116 | |
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[622] | 117 | pt_init = pt_init / ngp_2dh(0) |
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| 118 | DEALLOCATE( pt_init_local ) |
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[1] | 119 | |
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[622] | 120 | ENDIF |
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[1] | 121 | |
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| 122 | END SUBROUTINE init_slope |
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