1 | ! SPDX-FileCopyrightText: FLEXPART 1998-2019, see flexpart_license.txt |
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2 | ! SPDX-License-Identifier: GPL-3.0-or-later |
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3 | |
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4 | subroutine outgrid_init_nest |
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5 | |
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6 | !***************************************************************************** |
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7 | ! * |
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8 | ! This routine calculates, for each grid cell of the output nest, the * |
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9 | ! volume and the surface area. * |
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10 | ! * |
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11 | ! Author: A. Stohl * |
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12 | ! * |
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13 | ! 30 August 2004 * |
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14 | ! * |
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15 | !***************************************************************************** |
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16 | ! * |
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17 | ! Variables: * |
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18 | ! * |
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19 | ! arean surface area of all output nest cells * |
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20 | ! volumen volumes of all output nest cells * |
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21 | ! * |
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22 | !***************************************************************************** |
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23 | |
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24 | use unc_mod |
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25 | use outg_mod |
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26 | use par_mod |
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27 | use com_mod |
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28 | |
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29 | implicit none |
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30 | |
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31 | integer :: ix,jy,kz,ks,kp,nage,l,iix,jjy,ixp,jyp,i1,j1,j,ngrid |
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32 | integer :: stat |
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33 | real :: ylat,gridarea,ylatp,ylatm,hzone,cosfactm,cosfactp |
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34 | real :: xlon,xl,yl,ddx,ddy,rddx,rddy,p1,p2,p3,p4,xtn,ytn,oroh |
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35 | real,parameter :: eps=nxmax/3.e5 |
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36 | |
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37 | |
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38 | |
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39 | ! gridunc,griduncn uncertainty of outputted concentrations |
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40 | allocate(griduncn(0:numxgridn-1,0:numygridn-1,numzgrid,maxspec, & |
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41 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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42 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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43 | |
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44 | if (ldirect.gt.0) then |
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45 | allocate(wetgriduncn(0:numxgridn-1,0:numygridn-1,maxspec, & |
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46 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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47 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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48 | allocate(drygriduncn(0:numxgridn-1,0:numygridn-1,maxspec, & |
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49 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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50 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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51 | endif |
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52 | |
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53 | #ifdef USE_MPIINPLACE |
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54 | #else |
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55 | ! Extra field for totals at MPI root process |
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56 | if (lroot.and.mpi_mode.gt.0) then |
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57 | ! If MPI_IN_PLACE option is not used in mpi_mod.f90::mpif_tm_reduce_grid_nest(), |
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58 | ! then an aux array is needed for parallel grid reduction |
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59 | allocate(griduncn0(0:numxgridn-1,0:numygridn-1,numzgrid,maxspec, & |
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60 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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61 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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62 | ! allocate a dummy to avoid compilator complaints |
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63 | else if (.not.lroot.and.mpi_mode.gt.0) then |
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64 | allocate(griduncn0(1,1,1,1,1,1,1),stat=stat) |
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65 | end if |
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66 | #endif |
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67 | if (ldirect.gt.0) then |
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68 | if (lroot.and.mpi_mode.gt.0) then |
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69 | allocate(wetgriduncn0(0:numxgridn-1,0:numygridn-1,maxspec, & |
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70 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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71 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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72 | allocate(drygriduncn0(0:numxgridn-1,0:numygridn-1,maxspec, & |
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73 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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74 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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75 | ! endif |
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76 | ! allocate a dummy to avoid compilator complaints |
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77 | else if (.not.lroot.and.mpi_mode.gt.0) then |
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78 | allocate(wetgriduncn0(1,1,1,1,1,1),stat=stat) |
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79 | allocate(drygriduncn0(1,1,1,1,1,1),stat=stat) |
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80 | end if |
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81 | end if |
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82 | |
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83 | ! Compute surface area and volume of each grid cell: area, volume; |
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84 | ! and the areas of the northward and eastward facing walls: areaeast, areanorth |
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85 | !*********************************************************************** |
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86 | |
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87 | do jy=0,numygridn-1 |
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88 | ylat=outlat0n+(real(jy)+0.5)*dyoutn |
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89 | ylatp=ylat+0.5*dyoutn |
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90 | ylatm=ylat-0.5*dyoutn |
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91 | if ((ylatm.lt.0).and.(ylatp.gt.0.)) then |
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92 | hzone=dyoutn*r_earth*pi180 |
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93 | else |
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94 | |
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95 | ! Calculate area of grid cell with formula M=2*pi*R*h*dx/360, |
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96 | ! see Netz, Formeln der Mathematik, 5. Auflage (1983), p.90 |
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97 | !************************************************************ |
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98 | |
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99 | cosfactp=cos(ylatp*pi180) |
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100 | cosfactm=cos(ylatm*pi180) |
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101 | if (cosfactp.lt.cosfactm) then |
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102 | hzone=sqrt(1-cosfactp**2)- & |
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103 | sqrt(1-cosfactm**2) |
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104 | hzone=hzone*r_earth |
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105 | else |
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106 | hzone=sqrt(1-cosfactm**2)- & |
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107 | sqrt(1-cosfactp**2) |
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108 | hzone=hzone*r_earth |
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109 | endif |
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110 | endif |
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111 | |
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112 | |
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113 | |
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114 | ! Surface are of a grid cell at a latitude ylat |
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115 | !********************************************** |
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116 | |
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117 | gridarea=2.*pi*r_earth*hzone*dxoutn/360. |
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118 | |
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119 | do ix=0,numxgridn-1 |
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120 | arean(ix,jy)=gridarea |
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121 | |
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122 | ! Volume = area x box height |
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123 | !*************************** |
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124 | |
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125 | volumen(ix,jy,1)=arean(ix,jy)*outheight(1) |
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126 | do kz=2,numzgrid |
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127 | volumen(ix,jy,kz)=arean(ix,jy)*(outheight(kz)-outheight(kz-1)) |
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128 | end do |
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129 | end do |
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130 | end do |
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131 | |
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132 | |
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133 | !************************************************************************** |
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134 | ! Determine average height of model topography in nesteed output grid cells |
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135 | !************************************************************************** |
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136 | |
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137 | ! Loop over all output grid cells |
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138 | !******************************** |
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139 | |
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140 | do jjy=0,numygridn-1 |
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141 | do iix=0,numxgridn-1 |
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142 | oroh=0. |
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143 | |
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144 | ! Take 100 samples of the topography in every grid cell |
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145 | !****************************************************** |
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146 | |
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147 | do j1=1,10 |
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148 | ylat=outlat0n+(real(jjy)+real(j1)/10.-0.05)*dyoutn |
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149 | yl=(ylat-ylat0)/dy |
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150 | do i1=1,10 |
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151 | xlon=outlon0n+(real(iix)+real(i1)/10.-0.05)*dxoutn |
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152 | xl=(xlon-xlon0)/dx |
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153 | |
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154 | ! Determine the nest we are in |
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155 | !***************************** |
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156 | |
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157 | ngrid=0 |
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158 | do j=numbnests,1,-1 |
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159 | if ((xl.gt.xln(j)+eps).and.(xl.lt.xrn(j)-eps).and. & |
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160 | (yl.gt.yln(j)+eps).and.(yl.lt.yrn(j)-eps)) then |
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161 | ngrid=j |
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162 | goto 43 |
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163 | endif |
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164 | end do |
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165 | 43 continue |
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166 | |
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167 | ! Determine (nested) grid coordinates and auxiliary parameters used for interpolation |
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168 | !***************************************************************************** |
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169 | |
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170 | if (ngrid.gt.0) then |
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171 | xtn=(xl-xln(ngrid))*xresoln(ngrid) |
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172 | ytn=(yl-yln(ngrid))*yresoln(ngrid) |
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173 | ix=int(xtn) |
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174 | jy=int(ytn) |
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175 | ddy=ytn-real(jy) |
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176 | ddx=xtn-real(ix) |
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177 | else |
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178 | ix=int(xl) |
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179 | jy=int(yl) |
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180 | ddy=yl-real(jy) |
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181 | ddx=xl-real(ix) |
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182 | endif |
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183 | ixp=ix+1 |
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184 | jyp=jy+1 |
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185 | rddx=1.-ddx |
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186 | rddy=1.-ddy |
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187 | p1=rddx*rddy |
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188 | p2=ddx*rddy |
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189 | p3=rddx*ddy |
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190 | p4=ddx*ddy |
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191 | |
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192 | if (ngrid.gt.0) then |
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193 | oroh=oroh+p1*oron(ix ,jy ,ngrid) & |
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194 | + p2*oron(ixp,jy ,ngrid) & |
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195 | + p3*oron(ix ,jyp,ngrid) & |
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196 | + p4*oron(ixp,jyp,ngrid) |
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197 | else |
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198 | oroh=oroh+p1*oro(ix ,jy) & |
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199 | + p2*oro(ixp,jy) & |
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200 | + p3*oro(ix ,jyp) & |
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201 | + p4*oro(ixp,jyp) |
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202 | endif |
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203 | end do |
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204 | end do |
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205 | |
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206 | ! Divide by the number of samples taken |
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207 | !************************************** |
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208 | |
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209 | orooutn(iix,jjy)=oroh/100. |
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210 | end do |
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211 | end do |
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212 | |
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213 | |
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214 | |
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215 | !******************************* |
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216 | ! Initialization of output grids |
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217 | !******************************* |
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218 | |
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219 | do kp=1,maxpointspec_act |
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220 | do ks=1,nspec |
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221 | do nage=1,nageclass |
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222 | do jy=0,numygridn-1 |
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223 | do ix=0,numxgridn-1 |
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224 | do l=1,nclassunc |
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225 | ! Deposition fields |
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226 | if (ldirect.gt.0) then |
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227 | wetgriduncn(ix,jy,ks,kp,l,nage)=0. |
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228 | drygriduncn(ix,jy,ks,kp,l,nage)=0. |
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229 | endif |
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230 | ! Concentration fields |
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231 | do kz=1,numzgrid |
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232 | griduncn(ix,jy,kz,ks,kp,l,nage)=0. |
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233 | end do |
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234 | end do |
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235 | end do |
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236 | end do |
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237 | end do |
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238 | end do |
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239 | end do |
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240 | |
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241 | |
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242 | end subroutine outgrid_init_nest |
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