1 | !********************************************************************** |
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2 | ! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 * |
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3 | ! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, * |
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4 | ! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann * |
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5 | ! * |
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6 | ! This file is part of FLEXPART. * |
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7 | ! * |
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8 | ! FLEXPART is free software: you can redistribute it and/or modify * |
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9 | ! it under the terms of the GNU General Public License as published by* |
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10 | ! the Free Software Foundation, either version 3 of the License, or * |
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11 | ! (at your option) any later version. * |
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12 | ! * |
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13 | ! FLEXPART is distributed in the hope that it will be useful, * |
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14 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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15 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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16 | ! GNU General Public License for more details. * |
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17 | ! * |
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18 | ! You should have received a copy of the GNU General Public License * |
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19 | ! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
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20 | !********************************************************************** |
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21 | |
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22 | subroutine verttransform_gfs(n,uuh,vvh,wwh,pvh) |
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23 | ! i i i i i |
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24 | !***************************************************************************** |
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25 | ! * |
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26 | ! This subroutine transforms temperature, dew point temperature and * |
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27 | ! wind components from eta to meter coordinates. * |
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28 | ! The vertical wind component is transformed from Pa/s to m/s using * |
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29 | ! the conversion factor pinmconv. * |
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30 | ! In addition, this routine calculates vertical density gradients * |
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31 | ! needed for the parameterization of the turbulent velocities. * |
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32 | ! * |
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33 | ! Author: A. Stohl, G. Wotawa * |
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34 | ! * |
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35 | ! 12 August 1996 * |
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36 | ! Update: 16 January 1998 * |
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37 | ! * |
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38 | ! Major update: 17 February 1999 * |
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39 | ! by G. Wotawa * |
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40 | ! CHANGE 17/11/2005 Caroline Forster, NCEP GFS version * |
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41 | ! * |
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42 | ! - Vertical levels for u, v and w are put together * |
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43 | ! - Slope correction for vertical velocity: Modification of calculation * |
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44 | ! procedure * |
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45 | ! * |
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46 | !***************************************************************************** |
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47 | ! Changes, Bernd C. Krueger, Feb. 2001: |
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48 | ! Variables tth and qvh (on eta coordinates) from common block |
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49 | !***************************************************************************** |
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50 | ! Changes Arnold, D. and Morton, D. (2015): * |
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51 | ! -- description of local and common variables * |
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52 | !***************************************************************************** |
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53 | |
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54 | use par_mod |
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55 | use com_mod |
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56 | use cmapf_mod |
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57 | |
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58 | implicit none |
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59 | !*********************************************************************** |
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60 | ! Subroutine Parameters: * |
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61 | ! input * |
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62 | ! n temporal index for meteorological fields (1 to 3)* |
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63 | ! uuh,vvh, wwh wind components in ECMWF model levels * |
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64 | ! pvh potential vorticity in ECMWF model levels * |
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65 | integer :: n |
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66 | real :: uuh(0:nxmax-1,0:nymax-1,nuvzmax) |
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67 | real :: vvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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68 | real :: pvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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69 | real :: wwh(0:nxmax-1,0:nymax-1,nwzmax) |
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70 | !*********************************************************************** |
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71 | |
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72 | !*********************************************************************** |
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73 | ! Local variables * |
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74 | ! * |
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75 | ! ew subroutine/function to calculate saturation * |
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76 | ! water vaport for a given air temperature * |
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77 | ! clouds(0:nxmax,0:nymax,0:nzmax,2) cloud field for wet deposition * |
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78 | ! rain_cloud_above [0,1] whether there is a raining cloud or not * |
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79 | ! kz_inv inverted indez for kz * |
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80 | ! f_qvsat Saturation water vapor specific humidity (kg/kg) * |
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81 | ! pressure * |
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82 | ! rh relative humidity * |
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83 | ! lsp large scale precip at one grid cell * |
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84 | ! convp convective precip at one grid cell * |
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85 | ! uvzlev height of the eta half-levels * |
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86 | ! rhoh density in model levels * |
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87 | ! pinmconv conversion factor * |
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88 | ! pint pressure on model levels (using akz, bkz, ps) * |
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89 | ! tv virtual temperature * |
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90 | ! tvold,pold dummy variables to keep previous value * |
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91 | ! dz1, dz2, dz differences heights model levels, pressure levels * |
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92 | ! ui, vi * |
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93 | ! xlon,xlat * |
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94 | ! xlonr xlon*pi/180. * |
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95 | ! dzdx,dzdy slope corrections * |
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96 | ! dzdx1,dzdx2,dzdy1 slope corrections in each direction * |
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97 | ! uuaux,vvaux,uupolaux,vvpolaux auxiliary variables for polar sterero.* |
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98 | ! ddpol,ffpol for special treatment of poles * |
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99 | ! wdummy * |
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100 | ! wzlev * |
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101 | ! uvwzlev * |
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102 | |
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103 | integer :: rain_cloud_above,kz_inv |
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104 | real :: f_qvsat,pressure |
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105 | real :: rh,lsp,convp |
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106 | real :: uvzlev(nuvzmax),rhoh(nuvzmax),pinmconv(nzmax) |
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107 | real :: ew,pint,tv,tvold,pold,dz1,dz2,dz,ui,vi |
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108 | real :: xlon,ylat,xlonr,dzdx,dzdy |
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109 | real :: dzdx1,dzdx2,dzdy1,dzdy2 |
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110 | real :: uuaux,vvaux,uupolaux,vvpolaux,ddpol,ffpol,wdummy |
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111 | real :: wzlev(nwzmax),uvwzlev(0:nxmax-1,0:nymax-1,nzmax) |
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112 | |
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113 | ! NCEP version |
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114 | integer :: llev, i |
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115 | |
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116 | ! Other variables: |
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117 | ! ix,jy,kz,kzmin loop control indices in each direction * |
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118 | ! kl,klp |
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119 | ! ix1,jy1,ixp,jyp,ixm,jym |
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120 | integer :: ix,jy,kz,iz,kmin,kl,klp,ix1,jy1,ixp,jyp,ixm,jym |
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121 | !*********************************************************************** |
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122 | |
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123 | !*********************************************************************** |
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124 | ! Local constants * |
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125 | real,parameter :: const=r_air/ga |
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126 | !*********************************************************************** |
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127 | |
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128 | !*********************************************************************** |
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129 | ! Global variables * |
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130 | ! from par_mod and com_mod * |
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131 | ! nxmin1,nymin1 nx-1, ny-1, respectively * |
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132 | ! tt2 2 meter temperature * |
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133 | ! ps surface pressure * |
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134 | ! td2 2 meter dew point * |
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135 | ! height heights of all levels * |
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136 | ! akm, bkm coeffs. which regulate vertical discretization of ecmwf * |
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137 | ! akz, bkz model discretization coeffizients at the centre of layers * |
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138 | ! tv virtual temperature * |
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139 | ! nuvz,nwz vertical dimension of original ECMWF data * |
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140 | ! nx,ny,nz actual dimensions of wind fields in x,y and z* |
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141 | ! aknew,bknew model discretization coeffs. at the interpolated levels * |
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142 | ! uu,vv,ww [m/2] wind components in x,y and z direction * |
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143 | ! qv specific humidity data * |
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144 | ! pv (pvu) potential vorticity * |
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145 | ! rho [kg/m3] air density * |
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146 | ! drhodz [kg/m2] vertical air density gradient * |
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147 | ! dxconst,dyconst auxiliary variables for utransform,vtransform* |
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148 | ! ylat0 geographical latitude of lower left grid point * |
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149 | ! xlon0 geographical longitude of lower left grid point* |
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150 | ! uupol,vvpol [m/s] wind components in polar stereographic projection* |
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151 | ! clouds(0:nxmax,0:nymax,0:nzmax,2) cloud field for wet deposition * |
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152 | ! lsprec [mm/h] large scale total precipitation * |
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153 | ! convprec [mm/h] convective precipitation * |
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154 | ! cloudsh * |
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155 | ! * |
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156 | !*********************************************************************** |
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157 | |
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158 | !----------------------------------------------------------------------------- |
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159 | |
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160 | |
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161 | logical :: init = .true. |
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162 | |
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163 | |
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164 | !************************************************************************* |
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165 | ! If verttransform is called the first time, initialize heights of the * |
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166 | ! z levels in meter. The heights are the heights of model levels, where * |
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167 | ! u,v,T and qv are given, and of the interfaces, where w is given. So, * |
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168 | ! the vertical resolution in the z system is doubled. As reference point,* |
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169 | ! the lower left corner of the grid is used. * |
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170 | ! Unlike in the eta system, no difference between heights for u,v and * |
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171 | ! heights for w exists. * |
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172 | !************************************************************************* |
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173 | |
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174 | if (init) then |
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175 | |
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176 | ! Search for a point with high surface pressure (i.e. not above significant topography) |
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177 | ! Then, use this point to construct a reference z profile, to be used at all times |
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178 | !***************************************************************************** |
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179 | |
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180 | do jy=0,nymin1 |
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181 | do ix=0,nxmin1 |
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182 | if (ps(ix,jy,1,n).gt.100000.) then |
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183 | ixm=ix |
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184 | jym=jy |
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185 | goto 3 |
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186 | endif |
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187 | end do |
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188 | end do |
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189 | 3 continue |
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190 | |
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191 | |
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192 | tvold=tt2(ixm,jym,1,n)*(1.+0.378*ew(td2(ixm,jym,1,n))/ & |
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193 | ps(ixm,jym,1,n)) |
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194 | pold=ps(ixm,jym,1,n) |
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195 | height(1)=0. |
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196 | |
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197 | do kz=2,nuvz |
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198 | pint=akz(kz)+bkz(kz)*ps(ixm,jym,1,n) |
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199 | tv=tth(ixm,jym,kz,n)*(1.+0.608*qvh(ixm,jym,kz,n)) |
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200 | |
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201 | |
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202 | ! NOTE: In FLEXPART versions up to 4.0, the number of model levels was doubled |
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203 | ! upon the transformation to z levels. In order to save computer memory, this is |
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204 | ! not done anymore in the standard version. However, this option can still be |
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205 | ! switched on by replacing the following lines with those below, that are |
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206 | ! currently commented out. |
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207 | ! Note that two more changes are necessary in this subroutine below. |
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208 | ! One change is also necessary in gridcheck.f, and another one in verttransform_nests. |
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209 | !***************************************************************************** |
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210 | |
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211 | if (abs(tv-tvold).gt.0.2) then |
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212 | height(kz)= & |
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213 | height(kz-1)+const*log(pold/pint)* & |
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214 | (tv-tvold)/log(tv/tvold) |
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215 | else |
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216 | height(kz)=height(kz-1)+ & |
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217 | const*log(pold/pint)*tv |
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218 | endif |
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219 | |
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220 | ! Switch on following lines to use doubled vertical resolution |
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221 | !************************************************************* |
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222 | ! if (abs(tv-tvold).gt.0.2) then |
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223 | ! height((kz-1)*2)= |
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224 | ! + height(max((kz-2)*2,1))+const*log(pold/pint)* |
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225 | ! + (tv-tvold)/log(tv/tvold) |
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226 | ! else |
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227 | ! height((kz-1)*2)=height(max((kz-2)*2,1))+ |
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228 | ! + const*log(pold/pint)*tv |
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229 | ! endif |
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230 | ! End doubled vertical resolution |
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231 | |
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232 | tvold=tv |
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233 | pold=pint |
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234 | end do |
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235 | |
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236 | |
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237 | ! Switch on following lines to use doubled vertical resolution |
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238 | !************************************************************* |
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239 | ! do 7 kz=3,nz-1,2 |
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240 | ! height(kz)=0.5*(height(kz-1)+height(kz+1)) |
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241 | ! height(nz)=height(nz-1)+height(nz-1)-height(nz-2) |
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242 | ! End doubled vertical resolution |
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243 | |
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244 | |
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245 | ! Determine highest levels that can be within PBL |
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246 | !************************************************ |
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247 | |
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248 | do kz=1,nz |
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249 | if (height(kz).gt.hmixmax) then |
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250 | nmixz=kz |
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251 | goto 9 |
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252 | endif |
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253 | end do |
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254 | 9 continue |
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255 | |
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256 | ! Do not repeat initialization of the Cartesian z grid |
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257 | !***************************************************** |
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258 | |
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259 | init=.false. |
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260 | |
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261 | endif |
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262 | |
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263 | |
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264 | ! Loop over the whole grid |
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265 | !************************* |
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266 | |
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267 | do jy=0,nymin1 |
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268 | do ix=0,nxmin1 |
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269 | |
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270 | ! NCEP version: find first level above ground |
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271 | llev = 0 |
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272 | do i=1,nuvz |
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273 | if (ps(ix,jy,1,n).lt.akz(i)) llev=i |
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274 | end do |
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275 | llev = llev+1 |
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276 | if (llev.gt.nuvz-2) llev = nuvz-2 |
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277 | ! if (llev.eq.nuvz-2) write(*,*) 'verttransform |
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278 | ! +WARNING: LLEV eq NUZV-2' |
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279 | ! NCEP version |
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280 | |
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281 | |
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282 | ! compute height of pressure levels above ground |
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283 | !*********************************************** |
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284 | |
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285 | tvold=tth(ix,jy,llev,n)*(1.+0.608*qvh(ix,jy,llev,n)) |
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286 | pold=akz(llev) |
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287 | uvzlev(llev)=0. |
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288 | wzlev(llev)=0. |
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289 | uvwzlev(ix,jy,llev)=0. |
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290 | rhoh(llev)=pold/(r_air*tvold) |
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291 | |
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292 | do kz=llev+1,nuvz |
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293 | pint=akz(kz)+bkz(kz)*ps(ix,jy,1,n) |
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294 | tv=tth(ix,jy,kz,n)*(1.+0.608*qvh(ix,jy,kz,n)) |
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295 | rhoh(kz)=pint/(r_air*tv) |
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296 | |
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297 | if (abs(tv-tvold).gt.0.2) then |
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298 | uvzlev(kz)=uvzlev(kz-1)+const*log(pold/pint)* & |
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299 | (tv-tvold)/log(tv/tvold) |
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300 | else |
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301 | uvzlev(kz)=uvzlev(kz-1)+const*log(pold/pint)*tv |
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302 | endif |
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303 | wzlev(kz)=uvzlev(kz) |
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304 | uvwzlev(ix,jy,kz)=uvzlev(kz) |
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305 | |
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306 | tvold=tv |
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307 | pold=pint |
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308 | end do |
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309 | |
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310 | |
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311 | ! Switch on following lines to use doubled vertical resolution |
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312 | ! Switch off the three lines above. |
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313 | !************************************************************* |
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314 | !22 uvwzlev(ix,jy,(kz-1)*2)=uvzlev(kz) |
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315 | ! do 23 kz=2,nwz |
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316 | !23 uvwzlev(ix,jy,(kz-1)*2+1)=wzlev(kz) |
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317 | ! End doubled vertical resolution |
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318 | |
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319 | ! pinmconv=(h2-h1)/(p2-p1) |
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320 | |
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321 | pinmconv(llev)=(uvwzlev(ix,jy,llev+1)-uvwzlev(ix,jy,llev))/ & |
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322 | ((aknew(llev+1)+bknew(llev+1)*ps(ix,jy,1,n))- & |
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323 | (aknew(llev)+bknew(llev)*ps(ix,jy,1,n))) |
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324 | do kz=llev+1,nz-1 |
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325 | pinmconv(kz)=(uvwzlev(ix,jy,kz+1)-uvwzlev(ix,jy,kz-1))/ & |
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326 | ((aknew(kz+1)+bknew(kz+1)*ps(ix,jy,1,n))- & |
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327 | (aknew(kz-1)+bknew(kz-1)*ps(ix,jy,1,n))) |
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328 | end do |
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329 | pinmconv(nz)=(uvwzlev(ix,jy,nz)-uvwzlev(ix,jy,nz-1))/ & |
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330 | ((aknew(nz)+bknew(nz)*ps(ix,jy,1,n))- & |
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331 | (aknew(nz-1)+bknew(nz-1)*ps(ix,jy,1,n))) |
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332 | |
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333 | |
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334 | ! Levels, where u,v,t and q are given |
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335 | !************************************ |
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336 | |
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337 | uu(ix,jy,1,n)=uuh(ix,jy,llev) |
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338 | vv(ix,jy,1,n)=vvh(ix,jy,llev) |
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339 | tt(ix,jy,1,n)=tth(ix,jy,llev,n) |
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340 | qv(ix,jy,1,n)=qvh(ix,jy,llev,n) |
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341 | pv(ix,jy,1,n)=pvh(ix,jy,llev) |
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342 | rho(ix,jy,1,n)=rhoh(llev) |
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343 | pplev(ix,jy,1,n)=akz(llev) |
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344 | uu(ix,jy,nz,n)=uuh(ix,jy,nuvz) |
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345 | vv(ix,jy,nz,n)=vvh(ix,jy,nuvz) |
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346 | tt(ix,jy,nz,n)=tth(ix,jy,nuvz,n) |
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347 | qv(ix,jy,nz,n)=qvh(ix,jy,nuvz,n) |
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348 | pv(ix,jy,nz,n)=pvh(ix,jy,nuvz) |
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349 | rho(ix,jy,nz,n)=rhoh(nuvz) |
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350 | pplev(ix,jy,nz,n)=akz(nuvz) |
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351 | kmin=llev+1 |
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352 | do iz=2,nz-1 |
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353 | do kz=kmin,nuvz |
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354 | if(height(iz).gt.uvzlev(nuvz)) then |
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355 | uu(ix,jy,iz,n)=uu(ix,jy,nz,n) |
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356 | vv(ix,jy,iz,n)=vv(ix,jy,nz,n) |
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357 | tt(ix,jy,iz,n)=tt(ix,jy,nz,n) |
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358 | qv(ix,jy,iz,n)=qv(ix,jy,nz,n) |
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359 | pv(ix,jy,iz,n)=pv(ix,jy,nz,n) |
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360 | rho(ix,jy,iz,n)=rho(ix,jy,nz,n) |
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361 | pplev(ix,jy,iz,n)=pplev(ix,jy,nz,n) |
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362 | goto 30 |
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363 | endif |
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364 | if ((height(iz).gt.uvzlev(kz-1)).and. & |
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365 | (height(iz).le.uvzlev(kz))) then |
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366 | dz1=height(iz)-uvzlev(kz-1) |
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367 | dz2=uvzlev(kz)-height(iz) |
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368 | dz=dz1+dz2 |
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369 | uu(ix,jy,iz,n)=(uuh(ix,jy,kz-1)*dz2+uuh(ix,jy,kz)*dz1)/dz |
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370 | vv(ix,jy,iz,n)=(vvh(ix,jy,kz-1)*dz2+vvh(ix,jy,kz)*dz1)/dz |
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371 | tt(ix,jy,iz,n)=(tth(ix,jy,kz-1,n)*dz2 & |
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372 | +tth(ix,jy,kz,n)*dz1)/dz |
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373 | qv(ix,jy,iz,n)=(qvh(ix,jy,kz-1,n)*dz2 & |
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374 | +qvh(ix,jy,kz,n)*dz1)/dz |
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375 | pv(ix,jy,iz,n)=(pvh(ix,jy,kz-1)*dz2+pvh(ix,jy,kz)*dz1)/dz |
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376 | rho(ix,jy,iz,n)=(rhoh(kz-1)*dz2+rhoh(kz)*dz1)/dz |
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377 | pplev(ix,jy,iz,n)=(akz(kz-1)*dz2+akz(kz)*dz1)/dz |
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378 | endif |
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379 | end do |
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380 | 30 continue |
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381 | end do |
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382 | |
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383 | |
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384 | ! Levels, where w is given |
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385 | !************************* |
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386 | |
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387 | ww(ix,jy,1,n)=wwh(ix,jy,llev)*pinmconv(llev) |
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388 | ww(ix,jy,nz,n)=wwh(ix,jy,nwz)*pinmconv(nz) |
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389 | kmin=llev+1 |
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390 | do iz=2,nz |
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391 | do kz=kmin,nwz |
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392 | if ((height(iz).gt.wzlev(kz-1)).and. & |
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393 | (height(iz).le.wzlev(kz))) then |
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394 | dz1=height(iz)-wzlev(kz-1) |
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395 | dz2=wzlev(kz)-height(iz) |
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396 | dz=dz1+dz2 |
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397 | ww(ix,jy,iz,n)=(wwh(ix,jy,kz-1)*pinmconv(kz-1)*dz2 & |
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398 | +wwh(ix,jy,kz)*pinmconv(kz)*dz1)/dz |
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399 | |
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400 | endif |
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401 | end do |
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402 | end do |
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403 | |
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404 | |
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405 | ! Compute density gradients at intermediate levels |
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406 | !************************************************* |
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407 | |
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408 | drhodz(ix,jy,1,n)=(rho(ix,jy,2,n)-rho(ix,jy,1,n))/ & |
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409 | (height(2)-height(1)) |
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410 | do kz=2,nz-1 |
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411 | drhodz(ix,jy,kz,n)=(rho(ix,jy,kz+1,n)-rho(ix,jy,kz-1,n))/ & |
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412 | (height(kz+1)-height(kz-1)) |
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413 | end do |
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414 | drhodz(ix,jy,nz,n)=drhodz(ix,jy,nz-1,n) |
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415 | |
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416 | end do |
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417 | end do |
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418 | |
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419 | |
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420 | !**************************************************************** |
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421 | ! Compute slope of eta levels in windward direction and resulting |
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422 | ! vertical wind correction |
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423 | !**************************************************************** |
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424 | |
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425 | do jy=1,ny-2 |
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426 | do ix=1,nx-2 |
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427 | |
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428 | ! NCEP version: find first level above ground |
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429 | llev = 0 |
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430 | do i=1,nuvz |
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431 | if (ps(ix,jy,1,n).lt.akz(i)) llev=i |
---|
432 | end do |
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433 | llev = llev+1 |
---|
434 | if (llev.gt.nuvz-2) llev = nuvz-2 |
---|
435 | ! if (llev.eq.nuvz-2) write(*,*) 'verttransform |
---|
436 | ! +WARNING: LLEV eq NUZV-2' |
---|
437 | ! NCEP version |
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438 | |
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439 | kmin=llev+1 |
---|
440 | do iz=2,nz-1 |
---|
441 | |
---|
442 | ui=uu(ix,jy,iz,n)*dxconst/cos((real(jy)*dy+ylat0)*pi180) |
---|
443 | vi=vv(ix,jy,iz,n)*dyconst |
---|
444 | |
---|
445 | do kz=kmin,nz |
---|
446 | if ((height(iz).gt.uvwzlev(ix,jy,kz-1)).and. & |
---|
447 | (height(iz).le.uvwzlev(ix,jy,kz))) then |
---|
448 | dz1=height(iz)-uvwzlev(ix,jy,kz-1) |
---|
449 | dz2=uvwzlev(ix,jy,kz)-height(iz) |
---|
450 | dz=dz1+dz2 |
---|
451 | kl=kz-1 |
---|
452 | klp=kz |
---|
453 | goto 47 |
---|
454 | endif |
---|
455 | end do |
---|
456 | |
---|
457 | 47 ix1=ix-1 |
---|
458 | jy1=jy-1 |
---|
459 | ixp=ix+1 |
---|
460 | jyp=jy+1 |
---|
461 | |
---|
462 | dzdx1=(uvwzlev(ixp,jy,kl)-uvwzlev(ix1,jy,kl))/2. |
---|
463 | dzdx2=(uvwzlev(ixp,jy,klp)-uvwzlev(ix1,jy,klp))/2. |
---|
464 | dzdx=(dzdx1*dz2+dzdx2*dz1)/dz |
---|
465 | |
---|
466 | dzdy1=(uvwzlev(ix,jyp,kl)-uvwzlev(ix,jy1,kl))/2. |
---|
467 | dzdy2=(uvwzlev(ix,jyp,klp)-uvwzlev(ix,jy1,klp))/2. |
---|
468 | dzdy=(dzdy1*dz2+dzdy2*dz1)/dz |
---|
469 | |
---|
470 | ww(ix,jy,iz,n)=ww(ix,jy,iz,n)+(dzdx*ui+dzdy*vi) |
---|
471 | |
---|
472 | end do |
---|
473 | |
---|
474 | end do |
---|
475 | end do |
---|
476 | |
---|
477 | |
---|
478 | ! If north pole is in the domain, calculate wind velocities in polar |
---|
479 | ! stereographic coordinates |
---|
480 | !******************************************************************* |
---|
481 | |
---|
482 | if (nglobal) then |
---|
483 | do jy=int(switchnorthg)-2,nymin1 |
---|
484 | ylat=ylat0+real(jy)*dy |
---|
485 | do ix=0,nxmin1 |
---|
486 | xlon=xlon0+real(ix)*dx |
---|
487 | do iz=1,nz |
---|
488 | call cc2gll(northpolemap,ylat,xlon,uu(ix,jy,iz,n), & |
---|
489 | vv(ix,jy,iz,n),uupol(ix,jy,iz,n), & |
---|
490 | vvpol(ix,jy,iz,n)) |
---|
491 | end do |
---|
492 | end do |
---|
493 | end do |
---|
494 | |
---|
495 | |
---|
496 | do iz=1,nz |
---|
497 | |
---|
498 | ! CALCULATE FFPOL, DDPOL FOR CENTRAL GRID POINT |
---|
499 | xlon=xlon0+real(nx/2-1)*dx |
---|
500 | xlonr=xlon*pi/180. |
---|
501 | ffpol=sqrt(uu(nx/2-1,nymin1,iz,n)**2+ & |
---|
502 | vv(nx/2-1,nymin1,iz,n)**2) |
---|
503 | if(vv(nx/2-1,nymin1,iz,n).lt.0.) then |
---|
504 | ddpol=atan(uu(nx/2-1,nymin1,iz,n)/ & |
---|
505 | vv(nx/2-1,nymin1,iz,n))-xlonr |
---|
506 | elseif (vv(nx/2-1,nymin1,iz,n).gt.0.) then |
---|
507 | ddpol=pi+atan(uu(nx/2-1,nymin1,iz,n)/ & |
---|
508 | vv(nx/2-1,nymin1,iz,n))-xlonr |
---|
509 | else |
---|
510 | ddpol=pi/2-xlonr |
---|
511 | endif |
---|
512 | if(ddpol.lt.0.) ddpol=2.0*pi+ddpol |
---|
513 | if(ddpol.gt.2.0*pi) ddpol=ddpol-2.0*pi |
---|
514 | |
---|
515 | ! CALCULATE U,V FOR 180 DEG, TRANSFORM TO POLAR STEREOGRAPHIC GRID |
---|
516 | xlon=180.0 |
---|
517 | xlonr=xlon*pi/180. |
---|
518 | ylat=90.0 |
---|
519 | uuaux=-ffpol*sin(xlonr+ddpol) |
---|
520 | vvaux=-ffpol*cos(xlonr+ddpol) |
---|
521 | call cc2gll(northpolemap,ylat,xlon,uuaux,vvaux,uupolaux, & |
---|
522 | vvpolaux) |
---|
523 | |
---|
524 | jy=nymin1 |
---|
525 | do ix=0,nxmin1 |
---|
526 | uupol(ix,jy,iz,n)=uupolaux |
---|
527 | vvpol(ix,jy,iz,n)=vvpolaux |
---|
528 | end do |
---|
529 | end do |
---|
530 | |
---|
531 | |
---|
532 | ! Fix: Set W at pole to the zonally averaged W of the next equator- |
---|
533 | ! ward parallel of latitude |
---|
534 | |
---|
535 | do iz=1,nz |
---|
536 | wdummy=0. |
---|
537 | jy=ny-2 |
---|
538 | do ix=0,nxmin1 |
---|
539 | wdummy=wdummy+ww(ix,jy,iz,n) |
---|
540 | end do |
---|
541 | wdummy=wdummy/real(nx) |
---|
542 | jy=nymin1 |
---|
543 | do ix=0,nxmin1 |
---|
544 | ww(ix,jy,iz,n)=wdummy |
---|
545 | end do |
---|
546 | end do |
---|
547 | |
---|
548 | endif |
---|
549 | |
---|
550 | |
---|
551 | ! If south pole is in the domain, calculate wind velocities in polar |
---|
552 | ! stereographic coordinates |
---|
553 | !******************************************************************* |
---|
554 | |
---|
555 | if (sglobal) then |
---|
556 | do jy=0,int(switchsouthg)+3 |
---|
557 | ylat=ylat0+real(jy)*dy |
---|
558 | do ix=0,nxmin1 |
---|
559 | xlon=xlon0+real(ix)*dx |
---|
560 | do iz=1,nz |
---|
561 | call cc2gll(southpolemap,ylat,xlon,uu(ix,jy,iz,n), & |
---|
562 | vv(ix,jy,iz,n),uupol(ix,jy,iz,n), & |
---|
563 | vvpol(ix,jy,iz,n)) |
---|
564 | end do |
---|
565 | end do |
---|
566 | end do |
---|
567 | |
---|
568 | do iz=1,nz |
---|
569 | |
---|
570 | ! CALCULATE FFPOL, DDPOL FOR CENTRAL GRID POINT |
---|
571 | xlon=xlon0+real(nx/2-1)*dx |
---|
572 | xlonr=xlon*pi/180. |
---|
573 | ffpol=sqrt(uu(nx/2-1,0,iz,n)**2+ & |
---|
574 | vv(nx/2-1,0,iz,n)**2) |
---|
575 | if(vv(nx/2-1,0,iz,n).lt.0.) then |
---|
576 | ddpol=atan(uu(nx/2-1,0,iz,n)/ & |
---|
577 | vv(nx/2-1,0,iz,n))+xlonr |
---|
578 | elseif (vv(nx/2-1,0,iz,n).gt.0.) then |
---|
579 | ddpol=pi+atan(uu(nx/2-1,0,iz,n)/ & |
---|
580 | vv(nx/2-1,0,iz,n))-xlonr |
---|
581 | else |
---|
582 | ddpol=pi/2-xlonr |
---|
583 | endif |
---|
584 | if(ddpol.lt.0.) ddpol=2.0*pi+ddpol |
---|
585 | if(ddpol.gt.2.0*pi) ddpol=ddpol-2.0*pi |
---|
586 | |
---|
587 | ! CALCULATE U,V FOR 180 DEG, TRANSFORM TO POLAR STEREOGRAPHIC GRID |
---|
588 | xlon=180.0 |
---|
589 | xlonr=xlon*pi/180. |
---|
590 | ylat=-90.0 |
---|
591 | uuaux=+ffpol*sin(xlonr-ddpol) |
---|
592 | vvaux=-ffpol*cos(xlonr-ddpol) |
---|
593 | call cc2gll(northpolemap,ylat,xlon,uuaux,vvaux,uupolaux, & |
---|
594 | vvpolaux) |
---|
595 | |
---|
596 | jy=0 |
---|
597 | do ix=0,nxmin1 |
---|
598 | uupol(ix,jy,iz,n)=uupolaux |
---|
599 | vvpol(ix,jy,iz,n)=vvpolaux |
---|
600 | end do |
---|
601 | end do |
---|
602 | |
---|
603 | |
---|
604 | ! Fix: Set W at pole to the zonally averaged W of the next equator- |
---|
605 | ! ward parallel of latitude |
---|
606 | |
---|
607 | do iz=1,nz |
---|
608 | wdummy=0. |
---|
609 | jy=1 |
---|
610 | do ix=0,nxmin1 |
---|
611 | wdummy=wdummy+ww(ix,jy,iz,n) |
---|
612 | end do |
---|
613 | wdummy=wdummy/real(nx) |
---|
614 | jy=0 |
---|
615 | do ix=0,nxmin1 |
---|
616 | ww(ix,jy,iz,n)=wdummy |
---|
617 | end do |
---|
618 | end do |
---|
619 | endif |
---|
620 | |
---|
621 | |
---|
622 | ! write (*,*) 'initializing clouds, n:',n,nymin1,nxmin1,nz |
---|
623 | ! create a cloud and rainout/washout field, clouds occur where rh>80% |
---|
624 | ! total cloudheight is stored at level 0 |
---|
625 | do jy=0,nymin1 |
---|
626 | do ix=0,nxmin1 |
---|
627 | rain_cloud_above=0 |
---|
628 | lsp=lsprec(ix,jy,1,n) |
---|
629 | convp=convprec(ix,jy,1,n) |
---|
630 | cloudsh(ix,jy,n)=0 |
---|
631 | do kz_inv=1,nz-1 |
---|
632 | kz=nz-kz_inv+1 |
---|
633 | pressure=rho(ix,jy,kz,n)*r_air*tt(ix,jy,kz,n) |
---|
634 | rh=qv(ix,jy,kz,n)/f_qvsat(pressure,tt(ix,jy,kz,n)) |
---|
635 | clouds(ix,jy,kz,n)=0 |
---|
636 | if (rh.gt.0.8) then ! in cloud |
---|
637 | if ((lsp.gt.0.01).or.(convp.gt.0.01)) then ! cloud and precipitation |
---|
638 | rain_cloud_above=1 |
---|
639 | cloudsh(ix,jy,n)=cloudsh(ix,jy,n)+ & |
---|
640 | height(kz)-height(kz-1) |
---|
641 | if (lsp.ge.convp) then |
---|
642 | clouds(ix,jy,kz,n)=3 ! lsp dominated rainout |
---|
643 | else |
---|
644 | clouds(ix,jy,kz,n)=2 ! convp dominated rainout |
---|
645 | endif |
---|
646 | else ! no precipitation |
---|
647 | clouds(ix,jy,kz,n)=1 ! cloud |
---|
648 | endif |
---|
649 | else ! no cloud |
---|
650 | if (rain_cloud_above.eq.1) then ! scavenging |
---|
651 | if (lsp.ge.convp) then |
---|
652 | clouds(ix,jy,kz,n)=5 ! lsp dominated washout |
---|
653 | else |
---|
654 | clouds(ix,jy,kz,n)=4 ! convp dominated washout |
---|
655 | endif |
---|
656 | endif |
---|
657 | endif |
---|
658 | end do |
---|
659 | end do |
---|
660 | end do |
---|
661 | |
---|
662 | |
---|
663 | end subroutine verttransform_gfs |
---|