[e200b7a] | 1 | !********************************************************************** |
---|
| 2 | ! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 * |
---|
| 3 | ! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, * |
---|
| 4 | ! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann * |
---|
| 5 | ! * |
---|
| 6 | ! This file is part of FLEXPART. * |
---|
| 7 | ! * |
---|
| 8 | ! FLEXPART is free software: you can redistribute it and/or modify * |
---|
| 9 | ! it under the terms of the GNU General Public License as published by* |
---|
| 10 | ! the Free Software Foundation, either version 3 of the License, or * |
---|
| 11 | ! (at your option) any later version. * |
---|
| 12 | ! * |
---|
| 13 | ! FLEXPART is distributed in the hope that it will be useful, * |
---|
| 14 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of * |
---|
| 15 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
---|
| 16 | ! GNU General Public License for more details. * |
---|
| 17 | ! * |
---|
| 18 | ! You should have received a copy of the GNU General Public License * |
---|
| 19 | ! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
---|
| 20 | !********************************************************************** |
---|
| 21 | |
---|
| 22 | subroutine ohreaction(itime,ltsample,loutnext) |
---|
| 23 | ! i i i |
---|
| 24 | !***************************************************************************** |
---|
| 25 | ! * |
---|
| 26 | ! * |
---|
[8a65cb0] | 27 | ! Author: R.L. Thompson * |
---|
[e200b7a] | 28 | ! * |
---|
[8a65cb0] | 29 | ! Nov 2014 * |
---|
[e200b7a] | 30 | ! * |
---|
| 31 | ! * |
---|
| 32 | !***************************************************************************** |
---|
| 33 | ! Variables: * |
---|
[8a65cb0] | 34 | ! ix,jy indices of output grid cell for each particle * |
---|
| 35 | ! itime [s] actual simulation time [s] * |
---|
| 36 | ! jpart particle index * |
---|
| 37 | ! ldeltat [s] interval since radioactive decay was computed * |
---|
| 38 | ! loutnext [s] time for which gridded deposition is next output * |
---|
| 39 | ! loutstep [s] interval at which gridded deposition is output * |
---|
| 40 | ! oh_average [molecule/cm^3] OH Concentration * |
---|
| 41 | ! ltsample [s] interval over which mass is deposited * |
---|
[e200b7a] | 42 | ! * |
---|
| 43 | !***************************************************************************** |
---|
| 44 | |
---|
| 45 | use oh_mod |
---|
| 46 | use par_mod |
---|
| 47 | use com_mod |
---|
| 48 | |
---|
| 49 | implicit none |
---|
| 50 | |
---|
[8a65cb0] | 51 | integer :: jpart,itime,ltsample,loutnext,ldeltat,j,k,ix,jy!,ijx,jjy |
---|
| 52 | integer :: ngrid,interp_time,n,m,h,indz,i!,ia,il |
---|
| 53 | integer :: jjjjmmdd,hhmmss,OHx,OHy,OHz |
---|
| 54 | real, dimension(nzOH) :: altOHtop |
---|
| 55 | real :: xlon,ylat |
---|
| 56 | real :: xtn,ytn |
---|
| 57 | real :: restmass,ohreacted,oh_average |
---|
| 58 | real :: ohrate,temp |
---|
| 59 | real, parameter :: smallnum = tiny(0.0) ! smallest number that can be handled |
---|
[e200b7a] | 60 | real(kind=dp) :: jul |
---|
| 61 | |
---|
| 62 | ! Compute interval since radioactive decay of deposited mass was computed |
---|
| 63 | !************************************************************************ |
---|
| 64 | |
---|
| 65 | if (itime.le.loutnext) then |
---|
| 66 | ldeltat=itime-(loutnext-loutstep) |
---|
| 67 | else ! first half of next interval |
---|
| 68 | ldeltat=itime-loutnext |
---|
| 69 | endif |
---|
| 70 | |
---|
[8a65cb0] | 71 | jul=bdate+real(itime,kind=dp)/86400. |
---|
| 72 | call caldate(jul,jjjjmmdd,hhmmss) |
---|
| 73 | m=(jjjjmmdd-(jjjjmmdd/10000)*10000)/100 |
---|
| 74 | h=hhmmss/10000 |
---|
[e200b7a] | 75 | |
---|
[8a65cb0] | 76 | ! Loop over particles |
---|
[e200b7a] | 77 | !***************************************** |
---|
| 78 | |
---|
[8a65cb0] | 79 | do jpart=1,numpart |
---|
| 80 | |
---|
| 81 | ! Determine which nesting level to be used |
---|
[e200b7a] | 82 | ngrid=0 |
---|
| 83 | do j=numbnests,1,-1 |
---|
| 84 | if ((xtra1(jpart).gt.xln(j)).and.(xtra1(jpart).lt.xrn(j)).and. & |
---|
| 85 | (ytra1(jpart).gt.yln(j)).and.(ytra1(jpart).lt.yrn(j))) then |
---|
| 86 | ngrid=j |
---|
| 87 | goto 23 |
---|
| 88 | endif |
---|
| 89 | end do |
---|
[8a65cb0] | 90 | 23 continue |
---|
[e200b7a] | 91 | |
---|
[8a65cb0] | 92 | ! Determine nested grid coordinates |
---|
[e200b7a] | 93 | if (ngrid.gt.0) then |
---|
| 94 | xtn=(xtra1(jpart)-xln(ngrid))*xresoln(ngrid) |
---|
| 95 | ytn=(ytra1(jpart)-yln(ngrid))*yresoln(ngrid) |
---|
| 96 | ix=int(xtn) |
---|
| 97 | jy=int(ytn) |
---|
| 98 | else |
---|
| 99 | ix=int(xtra1(jpart)) |
---|
| 100 | jy=int(ytra1(jpart)) |
---|
| 101 | endif |
---|
| 102 | |
---|
[8a65cb0] | 103 | interp_time=nint(itime-0.5*ltsample) |
---|
| 104 | n=2 |
---|
| 105 | if(abs(memtime(1)-interp_time).lt.abs(memtime(2)-interp_time)) n=1 |
---|
[e200b7a] | 106 | |
---|
[8a65cb0] | 107 | do i=2,nz |
---|
| 108 | if (height(i).gt.ztra1(jpart)) then |
---|
| 109 | indz=i-1 |
---|
| 110 | goto 6 |
---|
| 111 | endif |
---|
| 112 | end do |
---|
[e200b7a] | 113 | 6 continue |
---|
| 114 | |
---|
[8a65cb0] | 115 | ! Get OH from nearest grid-cell and specific month |
---|
| 116 | !************************************************* |
---|
[e200b7a] | 117 | |
---|
[8a65cb0] | 118 | ! world coordinates |
---|
[e200b7a] | 119 | xlon=xtra1(jpart)*dx+xlon0 |
---|
| 120 | if (xlon.gt.180) then |
---|
| 121 | xlon=xlon-360 |
---|
| 122 | endif |
---|
| 123 | ylat=ytra1(jpart)*dy+ylat0 |
---|
| 124 | |
---|
[8a65cb0] | 125 | ! get position in the OH field |
---|
| 126 | OHx=minloc(abs(lonOH-xlon),dim=1,mask=abs(lonOH-xlon).eq.minval(abs(lonOH-xlon))) |
---|
| 127 | OHy=minloc(abs(latOH-ylat),dim=1,mask=abs(latOH-ylat).eq.minval(abs(latOH-ylat))) |
---|
| 128 | |
---|
| 129 | ! get the level of the OH field for the particle |
---|
| 130 | ! ztra1 is the z-coord of the trajectory above model orography in metres |
---|
| 131 | ! altOH is the height of the centre of the level in the OH field above orography |
---|
| 132 | do i=2,nzOH |
---|
| 133 | altOHtop(i-1)=altOH(i)+0.5*(altOH(i)-altOH(i-1)) |
---|
| 134 | end do |
---|
| 135 | altOHtop(nzOH)=altOH(nzOH)+0.5*(altOH(nzOH)-altOH(nzOH-1)) |
---|
| 136 | OHz=minloc(abs(altOHtop-ztra1(jpart)),dim=1,mask=abs(altOHtop-ztra1(jpart))& |
---|
| 137 | &.eq.minval(abs(altOHtop-ztra1(jpart)))) |
---|
| 138 | |
---|
| 139 | ! Interpolate between hourly OH fields to current time |
---|
| 140 | !***************************************************** |
---|
| 141 | |
---|
| 142 | oh_average=OH_hourly(OHx,OHy,OHz,1)+& |
---|
| 143 | &(OH_hourly(OHx,OHy,OHz,2)-OH_hourly(OHx,OHy,OHz,1))*& |
---|
| 144 | &(itime-memOHtime(1))/(memOHtime(2)-memOHtime(1)) |
---|
[e200b7a] | 145 | |
---|
| 146 | if (oh_average.gt.smallnum) then |
---|
[8a65cb0] | 147 | |
---|
| 148 | ! Computation of the OH reaction |
---|
| 149 | !********************************************************** |
---|
| 150 | |
---|
| 151 | temp=tt(ix,jy,indz,n) |
---|
| 152 | |
---|
| 153 | do k=1,nspec |
---|
| 154 | if (ohcconst(k).gt.0.) then |
---|
[78e62dc] | 155 | ohrate=ohcconst(k)*temp**ohnconst(k)*exp(-ohdconst(k)/temp)*oh_average |
---|
[8a65cb0] | 156 | ! new particle mass |
---|
| 157 | restmass = xmass1(jpart,k)*exp(-1*ohrate*abs(ltsample)) |
---|
| 158 | if (restmass .gt. smallnum) then |
---|
| 159 | xmass1(jpart,k)=restmass |
---|
| 160 | else |
---|
| 161 | xmass1(jpart,k)=0. |
---|
| 162 | endif |
---|
| 163 | ohreacted=xmass1(jpart,k)*(1-exp(-1*ohrate*abs(ltsample))) |
---|
[e200b7a] | 164 | else |
---|
[8a65cb0] | 165 | ohreacted=0. |
---|
[e200b7a] | 166 | endif |
---|
[8a65cb0] | 167 | end do |
---|
| 168 | |
---|
| 169 | endif ! oh_average.gt.smallnum |
---|
| 170 | |
---|
| 171 | end do !continue loop over all particles |
---|
[e200b7a] | 172 | |
---|
| 173 | |
---|
| 174 | end subroutine ohreaction |
---|
[8a65cb0] | 175 | |
---|