1 | SUBROUTINE prandtl_fluxes |
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2 | |
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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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17 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
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18 | !--------------------------------------------------------------------------------! |
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19 | ! |
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20 | ! Current revisions: |
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21 | ! ----------------- |
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22 | ! Adapted for land surface model |
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23 | ! |
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24 | ! Former revisions: |
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25 | ! ----------------- |
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26 | ! $Id: prandtl_fluxes.f90 1496 2014-12-02 17:25:50Z maronga $ |
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27 | ! |
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28 | ! 1494 2014-11-21 17:14:03Z maronga |
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29 | ! Bugfixes: qs is now calculated before calculation of Rif. Ccalculation of |
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30 | ! buoyancy flux in Rif corrected (added missing humidity term), allow use of |
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31 | ! topography for coupled runs (not tested) |
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32 | ! |
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33 | ! 1361 2014-04-16 15:17:48Z hoffmann |
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34 | ! Bugfix: calculation of turbulent fluxes of rain water content (qrsws) and rain |
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35 | ! drop concentration (nrsws) added |
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36 | ! |
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37 | ! 1340 2014-03-25 19:45:13Z kanani |
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38 | ! REAL constants defined as wp-kind |
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39 | ! |
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40 | ! 1320 2014-03-20 08:40:49Z raasch |
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41 | ! ONLY-attribute added to USE-statements, |
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42 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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43 | ! kinds are defined in new module kinds, |
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44 | ! old module precision_kind is removed, |
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45 | ! revision history before 2012 removed, |
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46 | ! comment fields (!:) to be used for variable explanations added to |
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47 | ! all variable declaration statements |
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48 | ! |
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49 | ! 1276 2014-01-15 13:40:41Z heinze |
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50 | ! Use LSF_DATA also in case of Dirichlet bottom boundary condition for scalars |
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51 | ! |
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52 | ! 1257 2013-11-08 15:18:40Z raasch |
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53 | ! openACC "kernels do" replaced by "kernels loop", "loop independent" added |
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54 | ! |
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55 | ! 1036 2012-10-22 13:43:42Z raasch |
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56 | ! code put under GPL (PALM 3.9) |
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57 | ! |
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58 | ! 1015 2012-09-27 09:23:24Z raasch |
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59 | ! OpenACC statements added |
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60 | ! |
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61 | ! 978 2012-08-09 08:28:32Z fricke |
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62 | ! roughness length for scalar quantities z0h added |
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63 | ! |
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64 | ! Revision 1.1 1998/01/23 10:06:06 raasch |
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65 | ! Initial revision |
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66 | ! |
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67 | ! |
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68 | ! Description: |
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69 | ! ------------ |
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70 | ! Diagnostic computation of vertical fluxes in the Prandtl layer from the |
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71 | ! values of the variables at grid point k=1 |
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72 | !------------------------------------------------------------------------------! |
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73 | |
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74 | USE arrays_3d, & |
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75 | ONLY: e, nr, nrs, nrsws, pt, q, qr, qrs, qrsws, qs, qsws, rif, shf, & |
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76 | ts, u, us, usws, v, vpt, vsws, zu, zw, z0, z0h |
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77 | |
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78 | USE control_parameters, & |
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79 | ONLY: cloud_physics, constant_heatflux, constant_waterflux, & |
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80 | coupling_mode, g, humidity, ibc_e_b, icloud_scheme, kappa, & |
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81 | large_scale_forcing, lsf_surf, passive_scalar, precipitation, & |
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82 | pt_surface, q_surface, rif_max, rif_min, run_coupled, & |
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83 | surface_pressure |
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84 | |
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85 | USE indices, & |
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86 | ONLY: nxl, nxlg, nxr, nxrg, nys, nysg, nyn, nyng, nzb_s_inner, & |
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87 | nzb_u_inner, nzb_v_inner |
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88 | |
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89 | USE kinds |
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90 | |
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91 | USE land_surface_model_mod, & |
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92 | ONLY: land_surface |
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93 | |
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94 | IMPLICIT NONE |
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95 | |
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96 | INTEGER(iwp) :: i !: |
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97 | INTEGER(iwp) :: j !: |
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98 | INTEGER(iwp) :: k !: |
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99 | |
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100 | LOGICAL :: coupled_run !: |
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101 | |
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102 | REAL(wp) :: a !: |
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103 | REAL(wp) :: b !: |
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104 | REAL(wp) :: e_q !: |
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105 | REAL(wp) :: rifm !: |
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106 | REAL(wp) :: uv_total !: |
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107 | REAL(wp) :: z_p !: |
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108 | |
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109 | ! |
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110 | !-- Data information for accelerators |
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111 | !$acc data present( e, nrsws, nzb_u_inner, nzb_v_inner, nzb_s_inner, pt ) & |
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112 | !$acc present( q, qs, qsws, qrsws, rif, shf, ts, u, us, usws, v ) & |
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113 | !$acc present( vpt, vsws, zu, zw, z0, z0h ) |
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114 | ! |
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115 | !-- Compute theta* |
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116 | IF ( constant_heatflux ) THEN |
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117 | |
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118 | ! |
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119 | !-- For a given heat flux in the Prandtl layer: |
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120 | !-- for u* use the value from the previous time step |
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121 | !$OMP PARALLEL DO |
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122 | !$acc kernels loop |
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123 | DO i = nxlg, nxrg |
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124 | DO j = nysg, nyng |
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125 | ts(j,i) = -shf(j,i) / ( us(j,i) + 1E-30_wp ) |
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126 | ! |
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127 | !-- ts must be limited, because otherwise overflow may occur in case of |
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128 | !-- us=0 when computing rif further below |
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129 | IF ( ts(j,i) < -1.05E5_wp ) ts(j,i) = -1.0E5_wp |
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130 | IF ( ts(j,i) > 1.0E5_wp ) ts(j,i) = 1.0E5_wp |
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131 | ENDDO |
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132 | ENDDO |
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133 | |
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134 | ELSE |
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135 | ! |
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136 | !-- For a given surface temperature: |
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137 | !-- (the Richardson number is still the one from the previous time step) |
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138 | IF ( large_scale_forcing .AND. lsf_surf ) THEN |
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139 | !$OMP PARALLEL DO |
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140 | !$acc kernels loop |
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141 | DO i = nxlg, nxrg |
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142 | DO j = nysg, nyng |
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143 | k = nzb_s_inner(j,i) |
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144 | pt(k,j,i) = pt_surface |
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145 | ENDDO |
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146 | ENDDO |
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147 | ENDIF |
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148 | |
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149 | !$OMP PARALLEL DO PRIVATE( a, b, k, z_p ) |
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150 | !$acc kernels loop |
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151 | DO i = nxlg, nxrg |
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152 | DO j = nysg, nyng |
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153 | |
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154 | k = nzb_s_inner(j,i) |
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155 | z_p = zu(k+1) - zw(k) |
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156 | |
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157 | IF ( rif(j,i) >= 0.0_wp ) THEN |
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158 | ! |
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159 | !-- Stable stratification |
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160 | ts(j,i) = kappa * ( pt(k+1,j,i) - pt(k,j,i) ) / ( & |
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161 | LOG( z_p / z0h(j,i) ) + & |
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162 | 5.0_wp * rif(j,i) * ( z_p - z0h(j,i) ) / z_p & |
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163 | ) |
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164 | ELSE |
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165 | ! |
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166 | !-- Unstable stratification |
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167 | a = SQRT( 1.0_wp - 16.0_wp * rif(j,i) ) |
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168 | b = SQRT( 1.0_wp - 16.0_wp * rif(j,i) * z0h(j,i) / z_p ) |
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169 | |
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170 | ts(j,i) = kappa * ( pt(k+1,j,i) - pt(k,j,i) ) / ( & |
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171 | LOG( z_p / z0h(j,i) ) - & |
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172 | 2.0_wp * LOG( ( 1.0_wp + a ) / ( 1.0_wp + b ) ) ) |
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173 | ENDIF |
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174 | |
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175 | ENDDO |
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176 | ENDDO |
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177 | ENDIF |
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178 | |
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179 | ! |
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180 | !-- If required compute q* |
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181 | IF ( humidity .OR. passive_scalar ) THEN |
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182 | IF ( constant_waterflux ) THEN |
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183 | ! |
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184 | !-- For a given water flux in the Prandtl layer: |
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185 | !$OMP PARALLEL DO |
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186 | !$acc kernels loop |
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187 | DO i = nxlg, nxrg |
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188 | DO j = nysg, nyng |
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189 | qs(j,i) = -qsws(j,i) / ( us(j,i) + 1E-30_wp ) |
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190 | ENDDO |
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191 | ENDDO |
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192 | |
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193 | ELSE |
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194 | coupled_run = ( coupling_mode == 'atmosphere_to_ocean' .AND. run_coupled ) |
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195 | |
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196 | IF ( large_scale_forcing .AND. lsf_surf ) THEN |
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197 | !$OMP PARALLEL DO |
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198 | !$acc kernels loop |
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199 | DO i = nxlg, nxrg |
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200 | DO j = nysg, nyng |
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201 | k = nzb_s_inner(j,i) |
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202 | q(k,j,i) = q_surface |
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203 | ENDDO |
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204 | ENDDO |
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205 | ENDIF |
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206 | |
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207 | !$OMP PARALLEL DO PRIVATE( a, b, k, z_p ) |
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208 | !$acc kernels loop independent |
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209 | DO i = nxlg, nxrg |
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210 | !$acc loop independent |
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211 | DO j = nysg, nyng |
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212 | |
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213 | k = nzb_s_inner(j,i) |
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214 | z_p = zu(k+1) - zw(k) |
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215 | |
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216 | ! |
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217 | !-- Assume saturation for atmosphere coupled to ocean (but not |
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218 | !-- in case of precursor runs) |
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219 | IF ( coupled_run ) THEN |
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220 | e_q = 6.1_wp * & |
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221 | EXP( 0.07_wp * ( MIN(pt(k,j,i),pt(k+1,j,i)) - 273.15_wp ) ) |
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222 | q(k,j,i) = 0.622_wp * e_q / ( surface_pressure - e_q ) |
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223 | ENDIF |
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224 | IF ( rif(j,i) >= 0.0_wp ) THEN |
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225 | ! |
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226 | !-- Stable stratification |
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227 | qs(j,i) = kappa * ( q(k+1,j,i) - q(k,j,i) ) / ( & |
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228 | LOG( z_p / z0h(j,i) ) + & |
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229 | 5.0_wp * rif(j,i) * ( z_p - z0h(j,i) ) / z_p & |
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230 | ) |
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231 | ELSE |
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232 | ! |
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233 | !-- Unstable stratification |
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234 | a = SQRT( 1.0_wp - 16.0_wp * rif(j,i) ) |
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235 | b = SQRT( 1.0_wp - 16.0_wp * rif(j,i) * z0h(j,i) / z_p ) |
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236 | |
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237 | qs(j,i) = kappa * ( q(k+1,j,i) - q(k,j,i) ) / ( & |
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238 | LOG( z_p / z0h(j,i) ) - & |
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239 | 2.0_wp * LOG( (1.0_wp + a ) / ( 1.0_wp + b ) ) ) |
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240 | ENDIF |
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241 | |
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242 | ENDDO |
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243 | ENDDO |
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244 | ENDIF |
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245 | ENDIF |
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246 | |
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247 | ! |
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248 | !-- Compute z_p/L (corresponds to the Richardson-flux number) |
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249 | IF ( .NOT. humidity ) THEN |
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250 | !$OMP PARALLEL DO PRIVATE( k, z_p ) |
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251 | !$acc kernels loop |
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252 | DO i = nxlg, nxrg |
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253 | DO j = nysg, nyng |
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254 | k = nzb_s_inner(j,i) |
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255 | z_p = zu(k+1) - zw(k) |
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256 | rif(j,i) = z_p * kappa * g * ts(j,i) / & |
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257 | ( pt(k+1,j,i) * ( us(j,i)**2 + 1E-30_wp ) ) |
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258 | ! |
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259 | !-- Limit the value range of the Richardson numbers. |
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260 | !-- This is necessary for very small velocities (u,v --> 0), because |
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261 | !-- the absolute value of rif can then become very large, which in |
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262 | !-- consequence would result in very large shear stresses and very |
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263 | !-- small momentum fluxes (both are generally unrealistic). |
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264 | IF ( rif(j,i) < rif_min ) rif(j,i) = rif_min |
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265 | IF ( rif(j,i) > rif_max ) rif(j,i) = rif_max |
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266 | ENDDO |
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267 | ENDDO |
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268 | ELSE |
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269 | !$OMP PARALLEL DO PRIVATE( k, z_p ) |
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270 | !$acc kernels loop |
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271 | DO i = nxlg, nxrg |
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272 | DO j = nysg, nyng |
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273 | k = nzb_s_inner(j,i) |
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274 | z_p = zu(k+1) - zw(k) |
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275 | rif(j,i) = z_p * kappa * g * & |
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276 | ( ts(j,i) + 0.61_wp * pt(k+1,j,i) * qs(j,i) + 0.61_wp & |
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277 | * q(k+1,j,i) * ts(j,i)) / & |
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278 | ( vpt(k+1,j,i) * ( us(j,i)**2 + 1E-30_wp ) ) |
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279 | ! |
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280 | !-- Limit the value range of the Richardson numbers. |
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281 | !-- This is necessary for very small velocities (u,v --> 0), because |
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282 | !-- the absolute value of rif can then become very large, which in |
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283 | !-- consequence would result in very large shear stresses and very |
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284 | !-- small momentum fluxes (both are generally unrealistic). |
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285 | IF ( rif(j,i) < rif_min ) rif(j,i) = rif_min |
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286 | IF ( rif(j,i) > rif_max ) rif(j,i) = rif_max |
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287 | ENDDO |
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288 | ENDDO |
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289 | ENDIF |
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290 | |
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291 | ! |
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292 | !-- Compute u* at the scalars' grid points |
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293 | !$OMP PARALLEL DO PRIVATE( a, b, k, uv_total, z_p ) |
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294 | !$acc kernels loop |
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295 | DO i = nxl, nxr |
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296 | DO j = nys, nyn |
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297 | |
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298 | k = nzb_s_inner(j,i) |
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299 | z_p = zu(k+1) - zw(k) |
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300 | |
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301 | ! |
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302 | !-- Compute the absolute value of the horizontal velocity |
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303 | !-- (relative to the surface) |
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304 | uv_total = SQRT( ( 0.5_wp * ( u(k+1,j,i) + u(k+1,j,i+1) & |
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305 | - u(k,j,i) - u(k,j,i+1) ) )**2 + & |
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306 | ( 0.5_wp * ( v(k+1,j,i) + v(k+1,j+1,i) & |
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307 | - v(k,j,i) - v(k,j+1,i) ) )**2 ) |
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308 | |
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309 | |
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310 | IF ( rif(j,i) >= 0.0_wp ) THEN |
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311 | ! |
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312 | !-- Stable stratification |
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313 | us(j,i) = kappa * uv_total / ( & |
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314 | LOG( z_p / z0(j,i) ) + & |
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315 | 5.0_wp * rif(j,i) * ( z_p - z0(j,i) ) / z_p & |
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316 | ) |
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317 | ELSE |
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318 | ! |
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319 | !-- Unstable stratification |
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320 | a = SQRT( SQRT( 1.0_wp - 16.0_wp * rif(j,i) ) ) |
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321 | b = SQRT( SQRT( 1.0_wp - 16.0_wp * rif(j,i) / z_p * z0(j,i) ) ) |
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322 | |
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323 | us(j,i) = kappa * uv_total / ( & |
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324 | LOG( z_p / z0(j,i) ) - & |
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325 | LOG( ( 1.0_wp + a )**2 * ( 1.0_wp + a**2 ) / ( & |
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326 | ( 1.0_wp + b )**2 * ( 1.0_wp + b**2 ) ) ) + & |
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327 | 2.0_wp * ( ATAN( a ) - ATAN( b ) ) & |
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328 | ) |
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329 | ENDIF |
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330 | ENDDO |
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331 | ENDDO |
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332 | |
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333 | ! |
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334 | !-- Values of us at ghost point locations are needed for the evaluation of usws |
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335 | !-- and vsws. |
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336 | !$acc update host( us ) |
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337 | CALL exchange_horiz_2d( us ) |
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338 | !$acc update device( us ) |
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339 | |
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340 | ! |
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341 | !-- Compute u'w' for the total model domain. |
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342 | !-- First compute the corresponding component of u* and square it. |
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343 | !$OMP PARALLEL DO PRIVATE( a, b, k, rifm, z_p ) |
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344 | !$acc kernels loop |
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345 | DO i = nxl, nxr |
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346 | DO j = nys, nyn |
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347 | |
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348 | k = nzb_u_inner(j,i) |
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349 | z_p = zu(k+1) - zw(k) |
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350 | |
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351 | ! |
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352 | !-- Compute Richardson-flux number for this point |
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353 | rifm = 0.5_wp * ( rif(j,i-1) + rif(j,i) ) |
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354 | IF ( rifm >= 0.0_wp ) THEN |
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355 | ! |
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356 | !-- Stable stratification |
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357 | usws(j,i) = kappa * ( u(k+1,j,i) - u(k,j,i) )/ ( & |
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358 | LOG( z_p / z0(j,i) ) + & |
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359 | 5.0_wp * rifm * ( z_p - z0(j,i) ) / z_p & |
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360 | ) |
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361 | ELSE |
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362 | ! |
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363 | !-- Unstable stratification |
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364 | a = SQRT( SQRT( 1.0_wp - 16.0_wp * rifm ) ) |
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365 | b = SQRT( SQRT( 1.0_wp - 16.0_wp * rifm / z_p * z0(j,i) ) ) |
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366 | |
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367 | usws(j,i) = kappa * ( u(k+1,j,i) - u(k,j,i) ) / ( & |
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368 | LOG( z_p / z0(j,i) ) - & |
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369 | LOG( (1.0_wp + a )**2 * ( 1.0_wp + a**2 ) / ( & |
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370 | (1.0_wp + b )**2 * ( 1.0_wp + b**2 ) ) ) + & |
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371 | 2.0_wp * ( ATAN( a ) - ATAN( b ) ) & |
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372 | ) |
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373 | ENDIF |
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374 | usws(j,i) = -usws(j,i) * 0.5_wp * ( us(j,i-1) + us(j,i) ) |
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375 | ENDDO |
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376 | ENDDO |
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377 | |
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378 | ! |
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379 | !-- Compute v'w' for the total model domain. |
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380 | !-- First compute the corresponding component of u* and square it. |
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381 | !$OMP PARALLEL DO PRIVATE( a, b, k, rifm, z_p ) |
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382 | !$acc kernels loop |
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383 | DO i = nxl, nxr |
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384 | DO j = nys, nyn |
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385 | |
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386 | k = nzb_v_inner(j,i) |
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387 | z_p = zu(k+1) - zw(k) |
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388 | |
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389 | ! |
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390 | !-- Compute Richardson-flux number for this point |
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391 | rifm = 0.5_wp * ( rif(j-1,i) + rif(j,i) ) |
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392 | IF ( rifm >= 0.0_wp ) THEN |
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393 | ! |
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394 | !-- Stable stratification |
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395 | vsws(j,i) = kappa * ( v(k+1,j,i) - v(k,j,i) ) / ( & |
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396 | LOG( z_p / z0(j,i) ) + & |
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397 | 5.0_wp * rifm * ( z_p - z0(j,i) ) / z_p & |
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398 | ) |
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399 | ELSE |
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400 | ! |
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401 | !-- Unstable stratification |
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402 | a = SQRT( SQRT( 1.0_wp - 16.0_wp * rifm ) ) |
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403 | b = SQRT( SQRT( 1.0_wp - 16.0_wp * rifm / z_p * z0(j,i) ) ) |
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404 | |
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405 | vsws(j,i) = kappa * ( v(k+1,j,i) - v(k,j,i) ) / ( & |
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406 | LOG( z_p / z0(j,i) ) - & |
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407 | LOG( (1.0_wp + a )**2 * ( 1.0_wp + a**2 ) / ( & |
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408 | (1.0_wp + b )**2 * ( 1.0_wp + b**2 ) ) ) + & |
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409 | 2.0_wp * ( ATAN( a ) - ATAN( b ) ) & |
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410 | ) |
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411 | ENDIF |
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412 | vsws(j,i) = -vsws(j,i) * 0.5_wp * ( us(j-1,i) + us(j,i) ) |
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413 | ENDDO |
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414 | ENDDO |
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415 | |
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416 | ! |
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417 | !-- If required compute qr* and nr* |
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418 | IF ( cloud_physics .AND. icloud_scheme == 0 .AND. precipitation ) THEN |
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419 | |
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420 | !$OMP PARALLEL DO PRIVATE( a, b, k, z_p ) |
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421 | !$acc kernels loop independent |
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422 | DO i = nxlg, nxrg |
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423 | !$acc loop independent |
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424 | DO j = nysg, nyng |
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425 | |
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426 | k = nzb_s_inner(j,i) |
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427 | z_p = zu(k+1) - zw(k) |
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428 | |
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429 | IF ( rif(j,i) >= 0.0 ) THEN |
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430 | ! |
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431 | !-- Stable stratification |
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432 | qrs(j,i) = kappa * ( qr(k+1,j,i) - qr(k,j,i) ) / ( & |
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433 | LOG( z_p / z0h(j,i) ) + & |
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434 | 5.0 * rif(j,i) * ( z_p - z0h(j,i) ) / z_p ) |
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435 | nrs(j,i) = kappa * ( nr(k+1,j,i) - nr(k,j,i) ) / ( & |
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436 | LOG( z_p / z0h(j,i) ) + & |
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437 | 5.0 * rif(j,i) * ( z_p - z0h(j,i) ) / z_p ) |
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438 | |
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439 | ELSE |
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440 | ! |
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441 | !-- Unstable stratification |
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442 | a = SQRT( 1.0 - 16.0 * rif(j,i) ) |
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443 | b = SQRT( 1.0 - 16.0 * rif(j,i) * z0h(j,i) / z_p ) |
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444 | |
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445 | qrs(j,i) = kappa * ( qr(k+1,j,i) - qr(k,j,i) ) / ( & |
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446 | LOG( z_p / z0h(j,i) ) - & |
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447 | 2.0 * LOG( (1.0 + a ) / ( 1.0 + b ) ) ) |
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448 | nrs(j,i) = kappa * ( nr(k+1,j,i) - nr(k,j,i) ) / ( & |
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449 | LOG( z_p / z0h(j,i) ) - & |
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450 | 2.0 * LOG( (1.0 + a ) / ( 1.0 + b ) ) ) |
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451 | |
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452 | ENDIF |
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453 | |
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454 | ENDDO |
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455 | ENDDO |
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456 | |
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457 | ENDIF |
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458 | |
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459 | ! |
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460 | !-- Exchange the boundaries for the momentum fluxes (only for sake of |
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461 | !-- completeness) |
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462 | !$acc update host( usws, vsws ) |
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463 | CALL exchange_horiz_2d( usws ) |
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464 | CALL exchange_horiz_2d( vsws ) |
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465 | !$acc update device( usws, vsws ) |
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466 | IF ( humidity .OR. passive_scalar ) THEN |
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467 | !$acc update host( qsws ) |
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468 | CALL exchange_horiz_2d( qsws ) |
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469 | !$acc update device( qsws ) |
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470 | IF ( cloud_physics .AND. icloud_scheme == 0 .AND. & |
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471 | precipitation ) THEN |
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472 | !$acc update host( qrsws, nrsws ) |
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473 | CALL exchange_horiz_2d( qrsws ) |
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474 | CALL exchange_horiz_2d( nrsws ) |
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475 | !$acc update device( qrsws, nrsws ) |
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476 | ENDIF |
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477 | ENDIF |
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478 | |
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479 | ! |
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480 | !-- Compute the vertical kinematic heat flux |
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481 | IF ( .NOT. constant_heatflux .AND. .NOT. land_surface ) THEN |
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482 | !$OMP PARALLEL DO |
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483 | !$acc kernels loop independent |
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484 | DO i = nxlg, nxrg |
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485 | !$acc loop independent |
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486 | DO j = nysg, nyng |
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487 | shf(j,i) = -ts(j,i) * us(j,i) |
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488 | ENDDO |
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489 | ENDDO |
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490 | ENDIF |
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491 | |
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492 | ! |
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493 | !-- Compute the vertical water/scalar flux |
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494 | IF ( .NOT. constant_waterflux .AND. ( humidity .OR. passive_scalar ) & |
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495 | .AND. .NOT. land_surface ) THEN |
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496 | !$OMP PARALLEL DO |
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497 | !$acc kernels loop independent |
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498 | DO i = nxlg, nxrg |
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499 | !$acc loop independent |
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500 | DO j = nysg, nyng |
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501 | qsws(j,i) = -qs(j,i) * us(j,i) |
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502 | ENDDO |
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503 | ENDDO |
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504 | ENDIF |
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505 | |
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506 | ! |
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507 | !-- Compute (turbulent) fluxes of rain water content and rain drop concentartion |
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508 | IF ( cloud_physics .AND. icloud_scheme == 0 .AND. precipitation ) THEN |
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509 | !$OMP PARALLEL DO |
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510 | !$acc kernels loop independent |
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511 | DO i = nxlg, nxrg |
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512 | !$acc loop independent |
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513 | DO j = nysg, nyng |
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514 | qrsws(j,i) = -qrs(j,i) * us(j,i) |
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515 | nrsws(j,i) = -nrs(j,i) * us(j,i) |
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516 | ENDDO |
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517 | ENDDO |
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518 | ENDIF |
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519 | |
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520 | ! |
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521 | !-- Bottom boundary condition for the TKE |
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522 | IF ( ibc_e_b == 2 ) THEN |
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523 | !$OMP PARALLEL DO |
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524 | !$acc kernels loop independent |
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525 | DO i = nxlg, nxrg |
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526 | !$acc loop independent |
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527 | DO j = nysg, nyng |
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528 | e(nzb_s_inner(j,i)+1,j,i) = ( us(j,i) / 0.1_wp )**2 |
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529 | ! |
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530 | !-- As a test: cm = 0.4 |
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531 | ! e(nzb_s_inner(j,i)+1,j,i) = ( us(j,i) / 0.4_wp )**2 |
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532 | e(nzb_s_inner(j,i),j,i) = e(nzb_s_inner(j,i)+1,j,i) |
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533 | ENDDO |
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534 | ENDDO |
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535 | ENDIF |
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536 | |
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537 | !$acc end data |
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538 | |
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539 | END SUBROUTINE prandtl_fluxes |
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