[e200b7a] | 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 initial_cond_calc(itime,i) |
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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 sensitivity to initial conditions for BW runs * |
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| 27 | ! * |
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| 28 | ! Author: A. Stohl * |
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| 29 | ! * |
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| 30 | ! 15 January 2010 * |
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| 31 | ! * |
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| 32 | !***************************************************************************** |
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| 33 | |
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| 34 | use unc_mod |
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| 35 | use outg_mod |
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| 36 | use par_mod |
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| 37 | use com_mod |
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| 38 | |
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| 39 | implicit none |
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| 40 | |
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| 41 | integer :: itime,i,ix,jy,ixp,jyp,kz,ks |
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| 42 | integer :: il,ind,indz,indzp,nrelpointer |
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| 43 | real :: rddx,rddy,p1,p2,p3,p4,dz1,dz2,dz |
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| 44 | real :: ddx,ddy |
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| 45 | real :: rhoprof(2),rhoi,xl,yl,wx,wy,w |
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| 46 | |
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| 47 | |
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| 48 | ! For forward simulations, make a loop over the number of species; |
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| 49 | ! for backward simulations, make an additional loop over the release points |
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| 50 | !************************************************************************** |
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| 51 | |
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| 52 | |
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| 53 | if (itra1(i).ne.itime) return |
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| 54 | |
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| 55 | ! Depending on output option, calculate air density or set it to 1 |
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| 56 | ! linit_cond: 1=mass unit, 2=mass mixing ratio unit |
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| 57 | !***************************************************************** |
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| 58 | |
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| 59 | |
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| 60 | if (linit_cond.eq.1) then ! mass unit |
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| 61 | |
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| 62 | ix=int(xtra1(i)) |
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| 63 | jy=int(ytra1(i)) |
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| 64 | ixp=ix+1 |
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| 65 | jyp=jy+1 |
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| 66 | ddx=xtra1(i)-real(ix) |
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| 67 | ddy=ytra1(i)-real(jy) |
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| 68 | rddx=1.-ddx |
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| 69 | rddy=1.-ddy |
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| 70 | p1=rddx*rddy |
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| 71 | p2=ddx*rddy |
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| 72 | p3=rddx*ddy |
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| 73 | p4=ddx*ddy |
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| 74 | |
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| 75 | do il=2,nz |
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| 76 | if (height(il).gt.ztra1(i)) then |
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| 77 | indz=il-1 |
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| 78 | indzp=il |
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| 79 | goto 6 |
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| 80 | endif |
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| 81 | end do |
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| 82 | 6 continue |
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| 83 | |
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| 84 | dz1=ztra1(i)-height(indz) |
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| 85 | dz2=height(indzp)-ztra1(i) |
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| 86 | dz=1./(dz1+dz2) |
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| 87 | |
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| 88 | ! Take density from 2nd wind field in memory (accurate enough, no time interpolation needed) |
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| 89 | !***************************************************************************** |
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| 90 | do ind=indz,indzp |
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| 91 | rhoprof(ind-indz+1)=p1*rho(ix ,jy ,ind,2) & |
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| 92 | +p2*rho(ixp,jy ,ind,2) & |
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| 93 | +p3*rho(ix ,jyp,ind,2) & |
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| 94 | +p4*rho(ixp,jyp,ind,2) |
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| 95 | end do |
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| 96 | rhoi=(dz1*rhoprof(2)+dz2*rhoprof(1))*dz |
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| 97 | elseif (linit_cond.eq.2) then ! mass mixing ratio unit |
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| 98 | rhoi=1. |
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| 99 | endif |
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| 100 | |
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| 101 | |
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| 102 | !**************************************************************************** |
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| 103 | ! 1. Evaluate grid concentrations using a uniform kernel of bandwidths dx, dy |
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| 104 | !**************************************************************************** |
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| 105 | |
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| 106 | |
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| 107 | ! For backward simulations, look from which release point the particle comes from |
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| 108 | ! For domain-filling trajectory option, npoint contains a consecutive particle |
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| 109 | ! number, not the release point information. Therefore, nrelpointer is set to 1 |
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| 110 | ! for the domain-filling option. |
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| 111 | !***************************************************************************** |
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| 112 | |
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| 113 | if ((ioutputforeachrelease.eq.0).or.(mdomainfill.eq.1)) then |
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| 114 | nrelpointer=1 |
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| 115 | else |
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| 116 | nrelpointer=npoint(i) |
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| 117 | endif |
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| 118 | |
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| 119 | do kz=1,numzgrid ! determine height of cell |
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| 120 | if (outheight(kz).gt.ztra1(i)) goto 21 |
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| 121 | end do |
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| 122 | 21 continue |
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| 123 | if (kz.le.numzgrid) then ! inside output domain |
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| 124 | |
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| 125 | |
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| 126 | xl=(xtra1(i)*dx+xoutshift)/dxout |
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| 127 | yl=(ytra1(i)*dy+youtshift)/dyout |
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| 128 | ix=int(xl) |
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| 129 | if (xl.lt.0.) ix=ix-1 |
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| 130 | jy=int(yl) |
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| 131 | if (yl.lt.0.) jy=jy-1 |
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| 132 | |
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| 133 | |
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| 134 | ! If a particle is close to the domain boundary, do not use the kernel either |
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| 135 | !**************************************************************************** |
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| 136 | |
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| 137 | if ((xl.lt.0.5).or.(yl.lt.0.5).or. & |
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| 138 | (xl.gt.real(numxgrid-1)-0.5).or. & |
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| 139 | (yl.gt.real(numygrid-1)-0.5)) then ! no kernel, direct attribution to grid cell |
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| 140 | if ((ix.ge.0).and.(jy.ge.0).and.(ix.le.numxgrid-1).and. & |
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| 141 | (jy.le.numygrid-1)) then |
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| 142 | do ks=1,nspec |
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| 143 | init_cond(ix,jy,kz,ks,nrelpointer)= & |
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| 144 | init_cond(ix,jy,kz,ks,nrelpointer)+ & |
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| 145 | xmass1(i,ks)/rhoi |
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| 146 | end do |
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| 147 | endif |
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| 148 | |
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| 149 | else ! attribution via uniform kernel |
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| 150 | |
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| 151 | ddx=xl-real(ix) ! distance to left cell border |
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| 152 | ddy=yl-real(jy) ! distance to lower cell border |
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| 153 | if (ddx.gt.0.5) then |
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| 154 | ixp=ix+1 |
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| 155 | wx=1.5-ddx |
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| 156 | else |
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| 157 | ixp=ix-1 |
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| 158 | wx=0.5+ddx |
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| 159 | endif |
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| 160 | |
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| 161 | if (ddy.gt.0.5) then |
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| 162 | jyp=jy+1 |
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| 163 | wy=1.5-ddy |
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| 164 | else |
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| 165 | jyp=jy-1 |
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| 166 | wy=0.5+ddy |
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| 167 | endif |
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| 168 | |
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| 169 | |
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| 170 | ! Determine mass fractions for four grid points |
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| 171 | !********************************************** |
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| 172 | |
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| 173 | if ((ix.ge.0).and.(ix.le.numxgrid-1)) then |
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| 174 | if ((jy.ge.0).and.(jy.le.numygrid-1)) then |
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| 175 | w=wx*wy |
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| 176 | do ks=1,nspec |
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| 177 | init_cond(ix,jy,kz,ks,nrelpointer)= & |
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| 178 | init_cond(ix,jy,kz,ks,nrelpointer)+xmass1(i,ks)/rhoi*w |
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| 179 | end do |
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| 180 | endif |
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| 181 | |
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| 182 | if ((jyp.ge.0).and.(jyp.le.numygrid-1)) then |
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| 183 | w=wx*(1.-wy) |
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| 184 | do ks=1,nspec |
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| 185 | init_cond(ix,jyp,kz,ks,nrelpointer)= & |
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| 186 | init_cond(ix,jyp,kz,ks,nrelpointer)+xmass1(i,ks)/rhoi*w |
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| 187 | end do |
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| 188 | endif |
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| 189 | endif |
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| 190 | |
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| 191 | |
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| 192 | if ((ixp.ge.0).and.(ixp.le.numxgrid-1)) then |
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| 193 | if ((jyp.ge.0).and.(jyp.le.numygrid-1)) then |
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| 194 | w=(1.-wx)*(1.-wy) |
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| 195 | do ks=1,nspec |
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| 196 | init_cond(ixp,jyp,kz,ks,nrelpointer)= & |
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| 197 | init_cond(ixp,jyp,kz,ks,nrelpointer)+xmass1(i,ks)/rhoi*w |
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| 198 | end do |
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| 199 | endif |
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| 200 | |
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| 201 | if ((jy.ge.0).and.(jy.le.numygrid-1)) then |
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| 202 | w=(1.-wx)*wy |
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| 203 | do ks=1,nspec |
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| 204 | init_cond(ixp,jy,kz,ks,nrelpointer)= & |
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| 205 | init_cond(ixp,jy,kz,ks,nrelpointer)+xmass1(i,ks)/rhoi*w |
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| 206 | end do |
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| 207 | endif |
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| 208 | endif |
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| 209 | endif |
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| 210 | |
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| 211 | endif |
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| 212 | |
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| 213 | end subroutine initial_cond_calc |
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