1 | !> @file init_slope.f90 |
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2 | !--------------------------------------------------------------------------------------------------! |
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3 | ! This file is part of the PALM model system. |
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4 | ! |
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5 | ! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General |
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6 | ! Public License as published by the Free Software Foundation, either version 3 of the License, or |
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7 | ! (at your option) any later version. |
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8 | ! |
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9 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the |
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10 | ! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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11 | ! Public License for more details. |
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12 | ! |
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13 | ! You should have received a copy of the GNU General Public License along with PALM. If not, see |
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14 | ! <http://www.gnu.org/licenses/>. |
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15 | ! |
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16 | ! Copyright 1997-2020 Leibniz Universitaet Hannover |
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17 | !--------------------------------------------------------------------------------------------------! |
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18 | ! |
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19 | ! Current revisions: |
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20 | ! ----------------- |
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21 | ! |
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22 | ! |
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23 | ! Former revisions: |
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24 | ! ----------------- |
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25 | ! $Id: init_slope.f90 4648 2020-08-25 07:52:08Z raasch $ |
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26 | ! file re-formatted to follow the PALM coding standard |
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27 | ! |
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28 | ! 4360 2020-01-07 11:25:50Z suehring |
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29 | ! Corrected "Former revisions" section |
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30 | ! |
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31 | ! 3655 2019-01-07 16:51:22Z knoop |
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32 | ! Modularization of all bulk cloud physics code components |
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33 | ! |
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34 | ! Revision 1.1 2000/04/27 07:06:24 raasch |
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35 | ! Initial revision |
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36 | ! |
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37 | ! |
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38 | ! Description: |
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39 | ! ------------ |
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40 | !> Initialization of the temperature field and other variables used in case of a sloping surface. |
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41 | !> @note when a sloping surface is used, only one constant temperature |
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42 | !> gradient is allowed! |
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43 | !--------------------------------------------------------------------------------------------------! |
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44 | SUBROUTINE init_slope |
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45 | |
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46 | |
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47 | USE arrays_3d, & |
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48 | ONLY: pt, pt_init, pt_slope_ref, zu |
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49 | |
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50 | USE basic_constants_and_equations_mod, & |
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51 | ONLY: pi |
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52 | |
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53 | USE control_parameters, & |
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54 | ONLY: alpha_surface, initializing_actions, pt_slope_offset, pt_surface, & |
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55 | pt_vertical_gradient, sin_alpha_surface |
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56 | |
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57 | USE grid_variables, & |
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58 | ONLY: dx |
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59 | |
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60 | USE indices, & |
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61 | ONLY: ngp_2dh, nx, nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt |
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62 | |
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63 | USE kinds |
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64 | |
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65 | USE pegrid |
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66 | |
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67 | |
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68 | IMPLICIT NONE |
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69 | |
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70 | INTEGER(iwp) :: i !< |
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71 | INTEGER(iwp) :: j !< |
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72 | INTEGER(iwp) :: k !< |
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73 | |
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74 | REAL(wp) :: alpha !< |
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75 | REAL(wp) :: height !< |
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76 | REAL(wp) :: pt_value !< |
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77 | REAL(wp) :: radius !< |
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78 | |
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79 | REAL(wp), DIMENSION(:), ALLOCATABLE :: pt_init_local !< |
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80 | |
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81 | ! |
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82 | !-- Calculate reference temperature field needed for computing buoyancy |
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83 | ALLOCATE( pt_slope_ref(nzb:nzt+1,nxlg:nxrg) ) |
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84 | |
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85 | DO i = nxlg, nxrg |
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86 | DO k = nzb, nzt+1 |
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87 | |
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88 | ! |
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89 | !-- Compute height of grid-point relative to lower left corner of the total domain. |
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90 | !-- First compute the distance between the actual grid point and the lower left corner as well |
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91 | !-- as the angle between the line connecting these points and the bottom of the model. |
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92 | IF ( k /= nzb ) THEN |
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93 | radius = SQRT( ( i * dx )**2 + zu(k)**2 ) |
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94 | height = zu(k) |
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95 | ELSE |
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96 | radius = SQRT( ( i * dx )**2 ) |
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97 | height = 0.0_wp |
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98 | ENDIF |
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99 | IF ( radius /= 0.0_wp ) THEN |
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100 | alpha = ASIN( height / radius ) |
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101 | ELSE |
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102 | alpha = 0.0_wp |
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103 | ENDIF |
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104 | ! |
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105 | !-- Compute temperatures in the rotated coordinate system |
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106 | alpha = alpha + alpha_surface / 180.0_wp * pi |
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107 | pt_value = pt_surface + radius * SIN( alpha ) * pt_vertical_gradient(1) / 100.0_wp |
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108 | pt_slope_ref(k,i) = pt_value |
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109 | ENDDO |
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110 | ENDDO |
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111 | |
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112 | ! |
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113 | !-- Temperature difference between left and right boundary of the total domain, used for the cyclic |
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114 | !-- boundary in x-direction |
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115 | pt_slope_offset = (nx+1) * dx * sin_alpha_surface * pt_vertical_gradient(1) / 100.0_wp |
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116 | |
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117 | |
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118 | ! |
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119 | !-- Following action must only be executed for initial runs |
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120 | IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN |
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121 | ! |
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122 | !-- Set initial temperature equal to the reference temperature field |
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123 | DO j = nysg, nyng |
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124 | pt(:,j,:) = pt_slope_ref |
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125 | ENDDO |
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126 | |
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127 | ! |
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128 | !-- Recompute the mean initial temperature profile (mean along x-direction of the rotated |
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129 | !-- coordinate system) |
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130 | ALLOCATE( pt_init_local(nzb:nzt+1) ) |
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131 | pt_init_local = 0.0_wp |
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132 | DO i = nxl, nxr |
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133 | DO j = nys, nyn |
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134 | DO k = nzb, nzt+1 |
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135 | pt_init_local(k) = pt_init_local(k) + pt(k,j,i) |
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136 | ENDDO |
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137 | ENDDO |
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138 | ENDDO |
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139 | |
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140 | #if defined( __parallel ) |
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141 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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142 | CALL MPI_ALLREDUCE( pt_init_local, pt_init, nzt+2-nzb, MPI_REAL, MPI_SUM, comm2d, ierr ) |
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143 | #else |
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144 | pt_init = pt_init_local |
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145 | #endif |
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146 | |
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147 | pt_init = pt_init / ngp_2dh(0) |
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148 | DEALLOCATE( pt_init_local ) |
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149 | |
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150 | ENDIF |
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151 | |
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152 | END SUBROUTINE init_slope |
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