1 | !*********************************************************************** |
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2 | !* Copyright 2012,2013 * |
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3 | !* Jerome Brioude, Delia Arnold, Andreas Stohl, Wayne Angevine, * |
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4 | !* John Burkhart, Massimo Cassiani, Adam Dingwell, Richard C Easter, Sabine Eckhardt,* |
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5 | !* Stephanie Evan, Jerome D Fast, Don Morton, Ignacio Pisso, * |
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6 | !* Petra Seibert, Gerard Wotawa, Caroline Forster, Harald Sodemann, * |
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7 | !* * |
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8 | !* This file is part of FLEXPART WRF * |
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9 | !* * |
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10 | !* FLEXPART is free software: you can redistribute it and/or modify * |
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11 | !* it under the terms of the GNU General Public License as published by* |
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12 | !* the Free Software Foundation, either version 3 of the License, or * |
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13 | !* (at your option) any later version. * |
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14 | !* * |
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15 | !* FLEXPART is distributed in the hope that it will be useful, * |
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16 | !* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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17 | !* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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18 | !* GNU General Public License for more details. * |
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19 | !* * |
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20 | !* You should have received a copy of the GNU General Public License * |
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21 | !* along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
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22 | !*********************************************************************** |
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23 | subroutine outgrid_init_nest_irreg |
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24 | !******************************************************************************* |
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25 | ! * |
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26 | ! Note: This is the FLEXPART_WRF version of subroutine outgrid_init. * |
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27 | ! The computational grid is the WRF x-y grid rather than lat-lon. * |
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28 | ! * |
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29 | ! This routine calculates, for each grid cell of the output grid, the * |
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30 | ! volume, the surface area, and the areas of the northward and eastward * |
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31 | ! facing surfaces. * |
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32 | ! * |
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33 | ! Author: A. Stohl * |
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34 | ! * |
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35 | ! 7 August 2002 * |
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36 | ! * |
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37 | ! 26 Oct 2005, R. Easter - changes in gridarea, areaeast, areanorth * |
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38 | ! associated with WRF horizontal grid. * |
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39 | ! Dec 2005, R. Easter - changed names of "*lon0*" & "*lat0*" variables * |
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40 | ! * |
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41 | !******************************************************************************* |
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42 | ! * |
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43 | ! Variables: * |
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44 | ! * |
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45 | ! area surface area of all output grid cells * |
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46 | ! areaeast eastward facing wall area of all output grid cells * |
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47 | ! areanorth northward facing wall area of all output grid cells * |
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48 | ! volume volumes of all output grid cells * |
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49 | ! * |
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50 | !******************************************************************************* |
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51 | |
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52 | use unc_mod |
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53 | use outg_mod |
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54 | use par_mod |
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55 | use com_mod |
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56 | |
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57 | ! include 'includepar' |
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58 | ! include 'includecom' |
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59 | implicit none |
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60 | integer :: ix,jy,kz,k,i,nage,l,iix,jjy,ixp,jyp,i1,j1,j,ngrid |
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61 | ! real ylat,gridarea,ylatp,ylatm,hzone,cosfact,cosfactm,cosfactp |
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62 | real :: ymet,gridarea,m1,m2,xl1,xl2,yl1,yl2,tmpx,tmpy |
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63 | real :: xmet,xl,yl,ddx,ddy,rddx,rddy,p1,p2,p3,p4,xtn,ytn,oroh |
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64 | integer :: ks,kp,stat |
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65 | real,parameter :: eps=nxmax/3.e5 |
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66 | real :: lon2(4),lat2(4) |
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67 | real ( kind = 8 ) :: sphere01_polygon_area,haversine,area1 |
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68 | |
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69 | |
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70 | ! Compute surface area and volume of each grid cell: area, volume; |
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71 | ! and the areas of the northward and eastward facing walls: areaeast, areanorth |
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72 | !*********************************************************************** |
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73 | |
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74 | do jy=0,numygridn-1 |
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75 | |
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76 | ! ylat=outlat0+(real(jy)+0.5)*dyout |
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77 | ! ylatp=ylat+0.5*dyout |
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78 | ! ylatm=ylat-0.5*dyout |
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79 | ! if ((ylatm.lt.0).and.(ylatp.gt.0.)) then |
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80 | ! hzone=dyout*r_earth*pi180 |
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81 | ! else |
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82 | ! |
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83 | !C Calculate area of grid cell with formula M=2*pi*R*h*dx/360, |
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84 | !C see Netz, Formeln der Mathematik, 5. Auflage (1983), p.90 |
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85 | !************************************************************* |
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86 | ! |
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87 | ! cosfact=cos(ylat*pi180)*r_earth |
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88 | ! cosfactp=cos(ylatp*pi180)*r_earth |
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89 | ! cosfactm=cos(ylatm*pi180)*r_earth |
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90 | ! if (cosfactp.lt.cosfactm) then |
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91 | ! hzone=sqrt(r_earth**2-cosfactp**2)- |
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92 | ! + sqrt(r_earth**2-cosfactm**2) |
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93 | ! else |
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94 | ! hzone=sqrt(r_earth**2-cosfactm**2)- |
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95 | ! + sqrt(r_earth**2-cosfactp**2) |
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96 | ! endif |
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97 | ! endif |
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98 | ! |
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99 | !C Surface are of a grid cell at a latitude ylat |
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100 | !*********************************************** |
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101 | ! |
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102 | ! gridarea=2.*pi*r_earth*hzone*dxout/360. |
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103 | |
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104 | ! for FLEXPART_WRF, dx & dy are in meters, and no cos(lat) is needed |
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105 | ! ??? maybe should incorporate map factor here, |
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106 | ! and also for areaeast & areanorth ??? |
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107 | |
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108 | ! gridarea=dxoutn*dyoutn |
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109 | |
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110 | do ix=0,numxgridn-1 |
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111 | ! xl1=(real(ix)*dxoutn+out_xm0n)/dx |
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112 | ! yl1=(real(jy)*dyoutn+out_ym0n)/dy |
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113 | ! xl2=(real(ix+1)*dxoutn+out_xm0n)/dx |
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114 | ! yl2=(real(jy+1)*dyoutn+out_ym0n)/dy |
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115 | !! xr=out_xm0+real(numxgrid)*dxout |
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116 | ! m1=0.5*(m_x(int(xl1),int(yl1),1)+m_x(int(xl2),int(yl1),1)) |
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117 | ! m2=0.5*(m_y(int(xl1),int(yl1),1)+m_x(int(xl1),int(yl2),1)) |
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118 | ! arean(ix,jy)=dxoutn*m1*dyoutn*m2 |
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119 | |
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120 | ! A more precise method |
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121 | tmpx=out_xm0n+(float(ix))*dxoutn |
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122 | tmpy=out_ym0n+(float(jy))*dyoutn |
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123 | call xymeter_to_ll_wrf_out(tmpx,tmpy,lon2(1),lat2(1)) |
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124 | tmpx=out_xm0n+(float(ix+1))*dxoutn |
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125 | tmpy=out_ym0n+(float(jy))*dyoutn |
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126 | call xymeter_to_ll_wrf_out(tmpx,tmpy,lon2(2),lat2(2)) |
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127 | tmpx=out_xm0n+(float(ix+1))*dxoutn |
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128 | tmpy=out_ym0n+(float(jy+1))*dyoutn |
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129 | call xymeter_to_ll_wrf_out(tmpx,tmpy,lon2(3),lat2(3)) |
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130 | tmpx=out_xm0n+(float(ix))*dxoutn |
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131 | tmpy=out_ym0n+(float(jy+1))*dyoutn |
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132 | call xymeter_to_ll_wrf_out(tmpx,tmpy,lon2(4),lat2(4)) |
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133 | area1=sphere01_polygon_area ( 4, real(lat2,kind=8), real(lon2,kind=8) ) |
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134 | arean(ix,jy)=real(area1)*6370000.*6370000./coefdx/coefdx |
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135 | |
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136 | ! arean(ix,jy)=gridarea |
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137 | |
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138 | ! Volume = area x box height |
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139 | !*************************** |
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140 | |
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141 | volumen(ix,jy,1)=arean(ix,jy)*outheight(1) |
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142 | |
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143 | do kz=2,numzgrid |
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144 | |
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145 | volumen(ix,jy,kz)=arean(ix,jy)*(outheight(kz)-outheight(kz-1)) |
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146 | end do |
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147 | end do |
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148 | end do |
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149 | |
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150 | |
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151 | |
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152 | |
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153 | !****************************************************************** |
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154 | ! Determine average height of model topography in output grid cells |
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155 | !****************************************************************** |
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156 | |
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157 | ! Loop over all output grid cells |
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158 | !******************************** |
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159 | |
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160 | do jjy=0,numygridn-1 |
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161 | do iix=0,numxgridn-1 |
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162 | oroh=0. |
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163 | |
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164 | ! Take 100 samples of the topography in every grid cell |
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165 | !****************************************************** |
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166 | |
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167 | do j1=1,10 |
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168 | ! for FLEXPART_WRF, x & y coords are in meters, |
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169 | ! and the lon & lat variables below are in meters. |
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170 | ymet=out_ym0n+(real(jjy)+real(j1)/10.-0.05)*dyoutn |
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171 | yl=(ymet-ymet0)/dy |
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172 | do i1=1,10 |
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173 | xmet=out_xm0n+(real(iix)+real(i1)/10.-0.05)*dxoutn |
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174 | xl=(xmet-xmet0)/dx |
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175 | |
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176 | ! Determine the nest we are in |
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177 | !***************************** |
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178 | |
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179 | ngrid=0 |
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180 | do j=numbnests,1,-1 |
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181 | if ((xl.gt.xln(j)).and.(xl.lt.xrn(j)).and. & |
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182 | (yl.gt.yln(j)).and.(yl.lt.yrn(j))) then |
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183 | ngrid=j |
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184 | goto 43 |
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185 | endif |
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186 | end do |
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187 | 43 continue |
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188 | |
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189 | ! Determine (nested) grid coordinates and auxiliary parameters used for interpolation |
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190 | !************************************************************************************ |
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191 | |
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192 | if (ngrid.gt.0) then |
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193 | xtn=(xl-xln(ngrid))*xresoln(ngrid) |
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194 | ytn=(yl-yln(ngrid))*yresoln(ngrid) |
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195 | ix=int(xtn) |
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196 | jy=int(ytn) |
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197 | ddy=ytn-real(jy) |
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198 | ddx=xtn-real(ix) |
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199 | else |
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200 | ix=int(xl) |
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201 | jy=int(yl) |
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202 | ddy=yl-real(jy) |
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203 | ddx=xl-real(ix) |
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204 | endif |
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205 | ixp=ix+1 |
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206 | jyp=jy+1 |
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207 | rddx=1.-ddx |
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208 | rddy=1.-ddy |
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209 | p1=rddx*rddy |
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210 | p2=ddx*rddy |
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211 | p3=rddx*ddy |
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212 | p4=ddx*ddy |
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213 | |
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214 | if (ngrid.gt.0) then |
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215 | oroh=oroh+p1*oron(ix ,jy ,ngrid) & |
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216 | + p2*oron(ixp,jy ,ngrid) & |
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217 | + p3*oron(ix ,jyp,ngrid) & |
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218 | + p4*oron(ixp,jyp,ngrid) |
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219 | else |
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220 | oroh=oroh+p1*oro(ix ,jy) & |
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221 | + p2*oro(ixp,jy) & |
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222 | + p3*oro(ix ,jyp) & |
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223 | + p4*oro(ixp,jyp) |
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224 | endif |
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225 | end do |
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226 | end do |
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227 | |
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228 | ! Divide by the number of samples taken |
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229 | !************************************** |
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230 | |
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231 | orooutn(iix,jjy)=oroh/100. |
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232 | end do |
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233 | end do |
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234 | |
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235 | |
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236 | ! gridunc,griduncn uncertainty of outputted concentrations |
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237 | allocate(griduncn(0:numxgridn-1,0:numygridn-1,numzgrid,maxspec, & |
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238 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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239 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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240 | |
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241 | if (ldirect.gt.0) then |
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242 | allocate(wetgriduncn(0:numxgridn-1,0:numygridn-1,maxspec, & |
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243 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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244 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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245 | allocate(drygriduncn(0:numxgridn-1,0:numygridn-1,maxspec, & |
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246 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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247 | allocate(drygriduncn2(0:numxgridn-1,0:numygridn-1,maxspec, & |
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248 | maxpointspec_act,nclassunc,maxageclass),stat=stat) |
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249 | if (stat.ne.0) write(*,*)'ERROR:could not allocate nested gridunc' |
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250 | endif |
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251 | |
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252 | !write (*,*) 'Dimensions for fields', numxgrid,numygrid, & |
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253 | ! maxspec,maxpointspec_act,nclassunc,maxageclass |
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254 | |
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255 | ! allocate fields for concoutput with maximum dimension of outgrid |
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256 | ! and outgrid_nest |
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257 | ! Initial condition field |
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258 | |
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259 | !************************ |
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260 | ! Initialize output grids |
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261 | !************************ |
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262 | |
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263 | do kp=1,maxpointspec_act |
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264 | do ks=1,nspec |
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265 | do nage=1,nageclass |
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266 | do jy=0,numygridn-1 |
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267 | do ix=0,numxgridn-1 |
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268 | do l=1,nclassunc |
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269 | ! Deposition fields |
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270 | if (ldirect.gt.0) then |
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271 | wetgriduncn(ix,jy,ks,kp,l,nage)=0. |
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272 | drygriduncn(ix,jy,ks,kp,l,nage)=0. |
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273 | endif |
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274 | ! Concentration fields |
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275 | do kz=1,numzgrid |
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276 | griduncn(ix,jy,kz,ks,kp,l,nage)=0. |
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277 | end do |
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278 | end do |
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279 | end do |
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280 | end do |
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281 | end do |
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282 | end do |
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283 | end do |
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284 | |
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285 | |
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286 | end subroutine outgrid_init_nest_irreg |
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287 | |
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