| 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 conccalc(itime,weight) |
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| 23 | ! i i |
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| 24 | !***************************************************************************** |
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| 25 | ! * |
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| 26 | ! Calculation of the concentrations on a regular grid using volume * |
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| 27 | ! sampling * |
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| 28 | ! * |
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| 29 | ! Author: A. Stohl * |
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| 30 | ! * |
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| 31 | ! 24 May 1996 * |
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| 32 | ! * |
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| 33 | ! April 2000: Update to calculate age spectra * |
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| 34 | ! Bug fix to avoid negative conc. at the domain boundaries, * |
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| 35 | ! as suggested by Petra Seibert * |
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| 36 | ! * |
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| 37 | ! 2 July 2002: re-order if-statements in order to optimize CPU time * |
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| 38 | ! * |
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| 39 | ! * |
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| 40 | !***************************************************************************** |
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| 41 | ! * |
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| 42 | ! Variables: * |
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| 43 | ! nspeciesdim = nspec for forward runs, 1 for backward runs * |
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| 44 | ! * |
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| 45 | !***************************************************************************** |
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| 46 | |
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| 47 | use unc_mod |
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| 48 | use outg_mod |
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| 49 | use par_mod |
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| 50 | use com_mod |
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| 51 | use mpi_mod |
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| 52 | |
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| 53 | implicit none |
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| 54 | |
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| 55 | integer,intent(in) :: itime |
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| 56 | integer :: itage,i,ix,jy,ixp,jyp,kz,ks,n,nage |
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| 57 | integer :: il,ind,indz,indzp,nrelpointer |
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| 58 | real,intent(in) :: weight |
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| 59 | real :: rddx,rddy,p1,p2,p3,p4,dz1,dz2,dz |
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| 60 | real :: hx,hy,hz,h,xd,yd,zd,xkern,r2,c(maxspec),ddx,ddy |
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| 61 | real :: rhoprof(2),rhoi |
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| 62 | real :: xl,yl,wx,wy,w |
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| 63 | real,parameter :: factor=.596831, hxmax=6.0, hymax=4.0, hzmax=150. |
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| 64 | integer :: mind2 |
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| 65 | ! mind2 eso: pointer to 2nd windfield in memory |
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| 66 | |
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| 67 | ! For forward simulations, make a loop over the number of species; |
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| 68 | ! for backward simulations, make an additional loop over the |
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| 69 | ! releasepoints |
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| 70 | !*************************************************************************** |
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| 71 | |
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| 72 | if (mp_measure_time) call mpif_mtime('conccalc',0) |
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| 73 | |
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| 74 | mind2=memind(2) |
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| 75 | |
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| 76 | do i=1,numpart |
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| 77 | if (itra1(i).ne.itime) goto 20 |
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| 78 | |
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| 79 | ! Determine age class of the particle |
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| 80 | itage=abs(itra1(i)-itramem(i)) |
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| 81 | do nage=1,nageclass |
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| 82 | if (itage.lt.lage(nage)) goto 33 |
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| 83 | end do |
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| 84 | 33 continue |
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| 85 | |
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| 86 | |
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| 87 | ! For special runs, interpolate the air density to the particle position |
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| 88 | !************************************************************************ |
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| 89 | !*********************************************************************** |
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| 90 | !AF IND_SOURCE switches between different units for concentrations at the source |
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| 91 | !Af NOTE that in backward simulations the release of particles takes place |
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| 92 | !Af at the receptor and the sampling at the source. |
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| 93 | !Af 1="mass" |
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| 94 | !Af 2="mass mixing ratio" |
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| 95 | !Af IND_RECEPTOR switches between different units for concentrations at the receptor |
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| 96 | !Af 1="mass" |
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| 97 | !Af 2="mass mixing ratio" |
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| 98 | |
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| 99 | !Af switches for the conccalcfile: |
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| 100 | !AF IND_SAMP = 0 : xmass * 1 |
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| 101 | !Af IND_SAMP = -1 : xmass / rho |
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| 102 | |
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| 103 | !Af ind_samp is defined in readcommand.f |
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| 104 | |
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| 105 | if ( ind_samp .eq. -1 ) then |
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| 106 | |
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| 107 | ix=int(xtra1(i)) |
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| 108 | jy=int(ytra1(i)) |
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| 109 | ixp=ix+1 |
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| 110 | jyp=jy+1 |
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| 111 | ddx=xtra1(i)-real(ix) |
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| 112 | ddy=ytra1(i)-real(jy) |
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| 113 | rddx=1.-ddx |
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| 114 | rddy=1.-ddy |
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| 115 | p1=rddx*rddy |
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| 116 | p2=ddx*rddy |
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| 117 | p3=rddx*ddy |
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| 118 | p4=ddx*ddy |
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| 119 | |
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| 120 | ! eso: Temporary fix for particle exactly at north pole |
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| 121 | if (jyp >= nymax) then |
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| 122 | ! write(*,*) 'WARNING: conccalc.f90 jyp >= nymax' |
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| 123 | jyp=jyp-1 |
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| 124 | end if |
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| 125 | |
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| 126 | do il=2,nz |
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| 127 | if (height(il).gt.ztra1(i)) then |
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| 128 | indz=il-1 |
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| 129 | indzp=il |
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| 130 | goto 6 |
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| 131 | endif |
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| 132 | end do |
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| 133 | 6 continue |
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| 134 | |
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| 135 | dz1=ztra1(i)-height(indz) |
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| 136 | dz2=height(indzp)-ztra1(i) |
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| 137 | dz=1./(dz1+dz2) |
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| 138 | |
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| 139 | ! Take density from 2nd wind field in memory (accurate enough, no time interpolation needed) |
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| 140 | !***************************************************************************** |
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| 141 | do ind=indz,indzp |
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| 142 | ! rhoprof(ind-indz+1)=p1*rho(ix ,jy ,ind,2) & |
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| 143 | ! +p2*rho(ixp,jy ,ind,2) & |
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| 144 | ! +p3*rho(ix ,jyp,ind,2) & |
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| 145 | ! +p4*rho(ixp,jyp,ind,2) |
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| 146 | rhoprof(ind-indz+1)=p1*rho(ix ,jy ,ind,mind2) & |
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| 147 | +p2*rho(ixp,jy ,ind,mind2) & |
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| 148 | +p3*rho(ix ,jyp,ind,mind2) & |
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| 149 | +p4*rho(ixp,jyp,ind,mind2) |
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| 150 | |
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| 151 | end do |
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| 152 | rhoi=(dz1*rhoprof(2)+dz2*rhoprof(1))*dz |
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| 153 | elseif (ind_samp.eq.0) then |
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| 154 | rhoi = 1. |
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| 155 | endif |
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| 156 | |
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| 157 | |
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| 158 | !**************************************************************************** |
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| 159 | ! 1. Evaluate grid concentrations using a uniform kernel of bandwidths dx, dy |
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| 160 | !**************************************************************************** |
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| 161 | |
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| 162 | |
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| 163 | ! For backward simulations, look from which release point the particle comes from |
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| 164 | ! For domain-filling trajectory option, npoint contains a consecutive particle |
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| 165 | ! number, not the release point information. Therefore, nrelpointer is set to 1 |
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| 166 | ! for the domain-filling option. |
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| 167 | !***************************************************************************** |
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| 168 | |
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| 169 | if ((ioutputforeachrelease.eq.0).or.(mdomainfill.eq.1)) then |
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| 170 | nrelpointer=1 |
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| 171 | else |
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| 172 | nrelpointer=npoint(i) |
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| 173 | endif |
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| 174 | |
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| 175 | do kz=1,numzgrid ! determine height of cell |
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| 176 | if (outheight(kz).gt.ztra1(i)) goto 21 |
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| 177 | end do |
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| 178 | 21 continue |
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| 179 | if (kz.le.numzgrid) then ! inside output domain |
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| 180 | |
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| 181 | |
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| 182 | !******************************** |
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| 183 | ! Do everything for mother domain |
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| 184 | !******************************** |
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| 185 | |
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| 186 | xl=(xtra1(i)*dx+xoutshift)/dxout |
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| 187 | yl=(ytra1(i)*dy+youtshift)/dyout |
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| 188 | ix=int(xl) |
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| 189 | if (xl.lt.0.) ix=ix-1 |
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| 190 | jy=int(yl) |
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| 191 | if (yl.lt.0.) jy=jy-1 |
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| 192 | |
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| 193 | ! if (i.eq.10000) write(*,*) itime,xtra1(i),ytra1(i),ztra1(i),xl,yl |
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| 194 | |
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| 195 | |
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| 196 | ! For particles aged less than 3 hours, attribute particle mass to grid cell |
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| 197 | ! it resides in rather than use the kernel, in order to avoid its smoothing effect. |
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| 198 | ! For older particles, use the uniform kernel. |
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| 199 | ! If a particle is close to the domain boundary, do not use the kernel either. |
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| 200 | !***************************************************************************** |
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| 201 | |
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| 202 | if (lnokernel.or.(itage.lt.10800).or.(xl.lt.0.5).or.(yl.lt.0.5).or. & |
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| 203 | (xl.gt.real(numxgrid-1)-0.5).or. & |
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| 204 | (yl.gt.real(numygrid-1)-0.5)) then ! no kernel, direct attribution to grid cell |
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| 205 | if ((ix.ge.0).and.(jy.ge.0).and.(ix.le.numxgrid-1).and. & |
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| 206 | (jy.le.numygrid-1)) then |
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| 207 | do ks=1,nspec |
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| 208 | gridunc(ix,jy,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 209 | gridunc(ix,jy,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 210 | xmass1(i,ks)/rhoi*weight |
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| 211 | end do |
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| 212 | endif |
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| 213 | |
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| 214 | else ! attribution via uniform kernel |
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| 215 | |
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| 216 | ddx=xl-real(ix) ! distance to left cell border |
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| 217 | ddy=yl-real(jy) ! distance to lower cell border |
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| 218 | if (ddx.gt.0.5) then |
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| 219 | ixp=ix+1 |
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| 220 | wx=1.5-ddx |
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| 221 | else |
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| 222 | ixp=ix-1 |
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| 223 | wx=0.5+ddx |
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| 224 | endif |
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| 225 | |
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| 226 | if (ddy.gt.0.5) then |
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| 227 | jyp=jy+1 |
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| 228 | wy=1.5-ddy |
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| 229 | else |
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| 230 | jyp=jy-1 |
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| 231 | wy=0.5+ddy |
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| 232 | endif |
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| 233 | |
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| 234 | |
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| 235 | ! Determine mass fractions for four grid points |
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| 236 | !********************************************** |
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| 237 | |
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| 238 | if ((ix.ge.0).and.(ix.le.numxgrid-1)) then |
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| 239 | if ((jy.ge.0).and.(jy.le.numygrid-1)) then |
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| 240 | w=wx*wy |
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| 241 | do ks=1,nspec |
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| 242 | gridunc(ix,jy,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 243 | gridunc(ix,jy,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 244 | xmass1(i,ks)/rhoi*weight*w |
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| 245 | end do |
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| 246 | endif |
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| 247 | |
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| 248 | if ((jyp.ge.0).and.(jyp.le.numygrid-1)) then |
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| 249 | w=wx*(1.-wy) |
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| 250 | do ks=1,nspec |
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| 251 | gridunc(ix,jyp,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 252 | gridunc(ix,jyp,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 253 | xmass1(i,ks)/rhoi*weight*w |
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| 254 | end do |
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| 255 | endif |
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| 256 | endif |
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| 257 | |
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| 258 | |
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| 259 | if ((ixp.ge.0).and.(ixp.le.numxgrid-1)) then |
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| 260 | if ((jyp.ge.0).and.(jyp.le.numygrid-1)) then |
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| 261 | w=(1.-wx)*(1.-wy) |
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| 262 | do ks=1,nspec |
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| 263 | gridunc(ixp,jyp,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 264 | gridunc(ixp,jyp,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 265 | xmass1(i,ks)/rhoi*weight*w |
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| 266 | end do |
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| 267 | endif |
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| 268 | |
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| 269 | if ((jy.ge.0).and.(jy.le.numygrid-1)) then |
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| 270 | w=(1.-wx)*wy |
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| 271 | do ks=1,nspec |
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| 272 | gridunc(ixp,jy,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 273 | gridunc(ixp,jy,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 274 | xmass1(i,ks)/rhoi*weight*w |
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| 275 | end do |
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| 276 | endif |
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| 277 | endif |
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| 278 | endif |
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| 279 | |
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| 280 | |
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| 281 | |
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| 282 | !************************************ |
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| 283 | ! Do everything for the nested domain |
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| 284 | !************************************ |
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| 285 | |
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| 286 | if (nested_output.eq.1) then |
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| 287 | xl=(xtra1(i)*dx+xoutshiftn)/dxoutn |
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| 288 | yl=(ytra1(i)*dy+youtshiftn)/dyoutn |
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| 289 | ix=int(xl) |
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| 290 | if (xl.lt.0.) ix=ix-1 |
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| 291 | jy=int(yl) |
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| 292 | if (yl.lt.0.) jy=jy-1 |
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| 293 | |
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| 294 | |
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| 295 | ! For particles aged less than 3 hours, attribute particle mass to grid cell |
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| 296 | ! it resides in rather than use the kernel, in order to avoid its smoothing effect. |
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| 297 | ! For older particles, use the uniform kernel. |
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| 298 | ! If a particle is close to the domain boundary, do not use the kernel either. |
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| 299 | !***************************************************************************** |
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| 300 | |
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| 301 | if ((itage.lt.10800).or.(xl.lt.0.5).or.(yl.lt.0.5).or. & |
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| 302 | (xl.gt.real(numxgridn-1)-0.5).or. & |
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| 303 | (yl.gt.real(numygridn-1)-0.5)) then ! no kernel, direct attribution to grid cell |
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| 304 | if ((ix.ge.0).and.(jy.ge.0).and.(ix.le.numxgridn-1).and. & |
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| 305 | (jy.le.numygridn-1)) then |
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| 306 | do ks=1,nspec |
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| 307 | griduncn(ix,jy,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 308 | griduncn(ix,jy,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 309 | xmass1(i,ks)/rhoi*weight |
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| 310 | end do |
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| 311 | endif |
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| 312 | |
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| 313 | else ! attribution via uniform kernel |
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| 314 | |
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| 315 | ddx=xl-real(ix) ! distance to left cell border |
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| 316 | ddy=yl-real(jy) ! distance to lower cell border |
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| 317 | if (ddx.gt.0.5) then |
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| 318 | ixp=ix+1 |
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| 319 | wx=1.5-ddx |
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| 320 | else |
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| 321 | ixp=ix-1 |
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| 322 | wx=0.5+ddx |
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| 323 | endif |
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| 324 | |
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| 325 | if (ddy.gt.0.5) then |
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| 326 | jyp=jy+1 |
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| 327 | wy=1.5-ddy |
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| 328 | else |
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| 329 | jyp=jy-1 |
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| 330 | wy=0.5+ddy |
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| 331 | endif |
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| 332 | |
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| 333 | |
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| 334 | ! Determine mass fractions for four grid points |
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| 335 | !********************************************** |
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| 336 | |
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| 337 | if ((ix.ge.0).and.(ix.le.numxgridn-1)) then |
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| 338 | if ((jy.ge.0).and.(jy.le.numygridn-1)) then |
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| 339 | w=wx*wy |
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| 340 | do ks=1,nspec |
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| 341 | griduncn(ix,jy,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 342 | griduncn(ix,jy,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 343 | xmass1(i,ks)/rhoi*weight*w |
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| 344 | end do |
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| 345 | endif |
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| 346 | |
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| 347 | if ((jyp.ge.0).and.(jyp.le.numygridn-1)) then |
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| 348 | w=wx*(1.-wy) |
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| 349 | do ks=1,nspec |
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| 350 | griduncn(ix,jyp,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 351 | griduncn(ix,jyp,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 352 | xmass1(i,ks)/rhoi*weight*w |
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| 353 | end do |
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| 354 | endif |
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| 355 | endif |
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| 356 | |
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| 357 | |
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| 358 | if ((ixp.ge.0).and.(ixp.le.numxgridn-1)) then |
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| 359 | if ((jyp.ge.0).and.(jyp.le.numygridn-1)) then |
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| 360 | w=(1.-wx)*(1.-wy) |
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| 361 | do ks=1,nspec |
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| 362 | griduncn(ixp,jyp,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 363 | griduncn(ixp,jyp,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 364 | xmass1(i,ks)/rhoi*weight*w |
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| 365 | end do |
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| 366 | endif |
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| 367 | |
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| 368 | if ((jy.ge.0).and.(jy.le.numygridn-1)) then |
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| 369 | w=(1.-wx)*wy |
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| 370 | do ks=1,nspec |
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| 371 | griduncn(ixp,jy,kz,ks,nrelpointer,nclass(i),nage)= & |
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| 372 | griduncn(ixp,jy,kz,ks,nrelpointer,nclass(i),nage)+ & |
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| 373 | xmass1(i,ks)/rhoi*weight*w |
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| 374 | end do |
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| 375 | endif |
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| 376 | endif |
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| 377 | endif |
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| 378 | |
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| 379 | endif |
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| 380 | endif |
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| 381 | 20 continue |
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| 382 | end do |
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| 383 | |
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| 384 | !*********************************************************************** |
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| 385 | ! 2. Evaluate concentrations at receptor points, using the kernel method |
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| 386 | !*********************************************************************** |
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| 387 | |
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| 388 | do n=1,numreceptor |
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| 389 | |
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| 390 | |
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| 391 | ! Reset concentrations |
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| 392 | !********************* |
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| 393 | |
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| 394 | do ks=1,nspec |
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| 395 | c(ks)=0. |
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| 396 | end do |
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| 397 | |
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| 398 | |
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| 399 | ! Estimate concentration at receptor |
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| 400 | !*********************************** |
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| 401 | |
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| 402 | do i=1,numpart |
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| 403 | |
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| 404 | if (itra1(i).ne.itime) goto 40 |
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| 405 | itage=abs(itra1(i)-itramem(i)) |
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| 406 | |
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| 407 | hz=min(50.+0.3*sqrt(real(itage)),hzmax) |
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| 408 | zd=ztra1(i)/hz |
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| 409 | if (zd.gt.1.) goto 40 ! save computing time, leave loop |
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| 410 | |
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| 411 | hx=min((0.29+2.222e-3*sqrt(real(itage)))*dx+ & |
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| 412 | real(itage)*1.2e-5,hxmax) ! 80 km/day |
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| 413 | xd=(xtra1(i)-xreceptor(n))/hx |
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| 414 | if (xd*xd.gt.1.) goto 40 ! save computing time, leave loop |
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| 415 | |
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| 416 | hy=min((0.18+1.389e-3*sqrt(real(itage)))*dy+ & |
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| 417 | real(itage)*7.5e-6,hymax) ! 80 km/day |
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| 418 | yd=(ytra1(i)-yreceptor(n))/hy |
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| 419 | if (yd*yd.gt.1.) goto 40 ! save computing time, leave loop |
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| 420 | h=hx*hy*hz |
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| 421 | |
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| 422 | r2=xd*xd+yd*yd+zd*zd |
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| 423 | if (r2.lt.1.) then |
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| 424 | xkern=factor*(1.-r2) |
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| 425 | do ks=1,nspec |
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| 426 | c(ks)=c(ks)+xmass1(i,ks)*xkern/h |
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| 427 | end do |
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| 428 | endif |
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| 429 | 40 continue |
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| 430 | end do |
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| 431 | |
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| 432 | do ks=1,nspec |
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| 433 | creceptor(n,ks)=creceptor(n,ks)+2.*weight*c(ks)/receptorarea(n) |
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| 434 | end do |
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| 435 | end do |
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| 436 | |
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| 437 | if (mp_measure_time) call mpif_mtime('conccalc',1) |
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| 438 | |
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| 439 | end subroutine conccalc |
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