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|
!**********************************************************************
! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 *
! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, *
! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann *
! *
! This file is part of FLEXPART. *
! *
! FLEXPART is free software: you can redistribute it and/or modify *
! it under the terms of the GNU General Public License as published by*
! the Free Software Foundation, either version 3 of the License, or *
! (at your option) any later version. *
! *
! FLEXPART is distributed in the hope that it will be useful, *
! but WITHOUT ANY WARRANTY; without even the implied warranty of *
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
! GNU General Public License for more details. *
! *
! You should have received a copy of the GNU General Public License *
! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. *
!**********************************************************************
subroutine timemanager
!*****************************************************************************
! *
! Handles the computation of trajectories, i.e. determines which *
! trajectories have to be computed at what time. *
! Manages dry+wet deposition routines, radioactive decay and the computation *
! of concentrations. *
! *
! Author: A. Stohl *
! *
! 20 May 1996 *
! *
!*****************************************************************************
! Changes, Bernd C. Krueger, Feb. 2001: *
! Call of convmix when new windfield is read *
!------------------------------------ *
! Changes Petra Seibert, Sept 2002 *
! fix wet scavenging problem *
! Code may not be correct for decay of deposition! *
! Changes Petra Seibert, Nov 2002 *
! call convection BEFORE new fields are read in BWD mode *
! Changes Caroline Forster, Feb 2005 *
!new interface between flexpart and convection scheme *
!Emanuel's latest subroutine convect43c.f is used *
!*****************************************************************************
! *
! Variables: *
! DEP .true. if either wet or dry deposition is switched on *
! decay(maxspec) [1/s] decay constant for radioactive decay *
! DRYDEP .true. if dry deposition is switched on *
! ideltas [s] modelling period *
! itime [s] actual temporal position of calculation *
! ldeltat [s] time since computation of radioact. decay of depositions*
! loutaver [s] averaging period for concentration calculations *
! loutend [s] end of averaging for concentration calculations *
! loutnext [s] next time at which output fields shall be centered *
! loutsample [s] sampling interval for averaging of concentrations *
! loutstart [s] start of averaging for concentration calculations *
! loutstep [s] time interval for which concentrations shall be *
! calculated *
! npoint(maxpart) index, which starting point the trajectory has *
! starting positions of trajectories *
! nstop serves as indicator for fate of particles *
! in the particle loop *
! nstop1 serves as indicator for wind fields (see getfields) *
! outnum number of samples for each concentration calculation *
! outnum number of samples for each concentration calculation *
! prob probability of absorption at ground due to dry *
! deposition *
! WETDEP .true. if wet deposition is switched on *
! weight weight for each concentration sample (1/2 or 1) *
! uap(maxpart),ucp(maxpart),uzp(maxpart) = random velocities due to *
! turbulence *
! us(maxpart),vs(maxpart),ws(maxpart) = random velocities due to inter- *
! polation *
! xtra1(maxpart), ytra1(maxpart), ztra1(maxpart) = *
! spatial positions of trajectories *
! *
! Constants: *
! maxpart maximum number of trajectories *
! *
!*****************************************************************************
use unc_mod
use point_mod
use xmass_mod
use flux_mod
use outg_mod
use oh_mod
use par_mod
use com_mod
implicit none
integer :: j,ks,kp,l,n,itime,nstop,nstop1
! integer :: ksp
integer :: loutnext,loutstart,loutend
integer :: ix,jy,ldeltat,itage,nage
real :: outnum,weight,prob(maxspec)
real :: uap(maxpart),ucp(maxpart),uzp(maxpart),decfact
real :: us(maxpart),vs(maxpart),ws(maxpart)
integer(kind=2) :: cbt(maxpart)
real :: drydeposit(maxspec),gridtotalunc,wetgridtotalunc
real :: drygridtotalunc,xold,yold,zold,xmassfract
!double precision xm(maxspec,maxpointspec_act),
! + xm_depw(maxspec,maxpointspec_act),
! + xm_depd(maxspec,maxpointspec_act)
!open(88,file='TEST.dat')
! First output for time 0
!************************
loutnext=loutstep/2
outnum=0.
loutstart=loutnext-loutaver/2
loutend=loutnext+loutaver/2
! open(127,file=path(2)(1:length(2))//'depostat.dat'
! + ,form='unformatted')
!write (*,*) 'writing deposition statistics depostat.dat!'
!**********************************************************************
! Loop over the whole modelling period in time steps of mintime seconds
!**********************************************************************
!write (*,*) 'starting simulation'
do itime=0,ideltas,lsynctime
! Computation of wet deposition, OH reaction and mass transfer
! between two species every lsynctime seconds
! maybe wet depo frequency can be relaxed later but better be on safe side
! wetdepo must be called BEFORE new fields are read in but should not
! be called in the very beginning before any fields are loaded, or
! before particles are in the system
! Code may not be correct for decay of deposition
! changed by Petra Seibert 9/02
!********************************************************************
if (WETDEP .and. itime .ne. 0 .and. numpart .gt. 0) &
call wetdepo(itime,lsynctime,loutnext)
if (OHREA .and. itime .ne. 0 .and. numpart .gt. 0) &
call ohreaction(itime,lsynctime,loutnext)
if (ASSSPEC .and. itime .ne. 0 .and. numpart .gt. 0) then
stop 'associated species not yet implemented!'
! call transferspec(itime,lsynctime,loutnext)
endif
! compute convection for backward runs
!*************************************
if ((ldirect.eq.-1).and.(lconvection.eq.1).and.(itime.lt.0)) &
call convmix(itime)
! Get necessary wind fields if not available
!*******************************************
call getfields(itime,nstop1)
if (nstop1.gt.1) stop 'NO METEO FIELDS AVAILABLE'
! Release particles
!******************
if (mdomainfill.ge.1) then
if (itime.eq.0) then
call init_domainfill
else
call boundcond_domainfill(itime,loutend)
endif
else
call releaseparticles(itime)
endif
! Compute convective mixing for forward runs
! for backward runs it is done before next windfield is read in
!**************************************************************
if ((ldirect.eq.1).and.(lconvection.eq.1)) &
call convmix(itime)
! If middle of averaging period of output fields is reached, accumulated
! deposited mass radioactively decays
!***********************************************************************
if (DEP.and.(itime.eq.loutnext).and.(ldirect.gt.0)) then
do ks=1,nspec
do kp=1,maxpointspec_act
if (decay(ks).gt.0.) then
do nage=1,nageclass
do l=1,nclassunc
! Mother output grid
do jy=0,numygrid-1
do ix=0,numxgrid-1
wetgridunc(ix,jy,ks,kp,l,nage)= &
wetgridunc(ix,jy,ks,kp,l,nage)* &
exp(-1.*outstep*decay(ks))
drygridunc(ix,jy,ks,kp,l,nage)= &
drygridunc(ix,jy,ks,kp,l,nage)* &
exp(-1.*outstep*decay(ks))
end do
end do
! Nested output grid
if (nested_output.eq.1) then
do jy=0,numygridn-1
do ix=0,numxgridn-1
wetgriduncn(ix,jy,ks,kp,l,nage)= &
wetgriduncn(ix,jy,ks,kp,l,nage)* &
exp(-1.*outstep*decay(ks))
drygriduncn(ix,jy,ks,kp,l,nage)= &
drygriduncn(ix,jy,ks,kp,l,nage)* &
exp(-1.*outstep*decay(ks))
end do
end do
endif
end do
end do
endif
end do
end do
endif
!!! CHANGE: These lines may be switched on to check the conservation
!!! of mass within FLEXPART
! if (itime.eq.loutnext) then
! do 247 ksp=1, nspec
! do 247 kp=1, maxpointspec_act
!47 xm(ksp,kp)=0.
! do 249 ksp=1, nspec
! do 249 j=1,numpart
! if (ioutputforeachrelease.eq.1) then
! kp=npoint(j)
! else
! kp=1
! endif
! if (itra1(j).eq.itime) then
! xm(ksp,kp)=xm(ksp,kp)+xmass1(j,ksp)
! write(*,*) 'xmass: ',xmass1(j,ksp),j,ksp,nspec
! endif
!49 continue
! do 248 ksp=1,nspec
! do 248 kp=1,maxpointspec_act
! xm_depw(ksp,kp)=0.
! xm_depd(ksp,kp)=0.
! do 248 nage=1,nageclass
! do 248 ix=0,numxgrid-1
! do 248 jy=0,numygrid-1
! do 248 l=1,nclassunc
! xm_depw(ksp,kp)=xm_depw(ksp,kp)
! + +wetgridunc(ix,jy,ksp,kp,l,nage)
!48 xm_depd(ksp,kp)=xm_depd(ksp,kp)
! + +drygridunc(ix,jy,ksp,kp,l,nage)
! do 246 ksp=1,nspec
!46 write(88,'(2i10,3e12.3)')
! + itime,ksp,(xm(ksp,kp),kp=1,maxpointspec_act),
! + (xm_depw(ksp,kp),kp=1,maxpointspec_act),
! + (xm_depd(ksp,kp),kp=1,maxpointspec_act)
! endif
!!! CHANGE
! Check whether concentrations are to be calculated
!**************************************************
if ((ldirect*itime.ge.ldirect*loutstart).and. &
(ldirect*itime.le.ldirect*loutend)) then ! add to grid
if (mod(itime-loutstart,loutsample).eq.0) then
! If we are exactly at the start or end of the concentration averaging interval,
! give only half the weight to this sample
!*****************************************************************************
if ((itime.eq.loutstart).or.(itime.eq.loutend)) then
weight=0.5
else
weight=1.0
endif
outnum=outnum+weight
call conccalc(itime,weight)
endif
if ((mquasilag.eq.1).and.(itime.eq.(loutstart+loutend)/2)) &
call partoutput_short(itime) ! dump particle positions in extremely compressed format
! Output and reinitialization of grid
! If necessary, first sample of new grid is also taken
!*****************************************************
if ((itime.eq.loutend).and.(outnum.gt.0.)) then
if ((iout.le.3.).or.(iout.eq.5)) then
call concoutput(itime,outnum,gridtotalunc, &
wetgridtotalunc,drygridtotalunc)
if (nested_output.eq.1) call concoutput_nest(itime,outnum)
outnum=0.
endif
if ((iout.eq.4).or.(iout.eq.5)) call plumetraj(itime)
if (iflux.eq.1) call fluxoutput(itime)
write(*,45) itime,numpart,gridtotalunc,wetgridtotalunc, &
drygridtotalunc
45 format(i9,' SECONDS SIMULATED: ',i8, &
' PARTICLES: Uncertainty: ',3f7.3)
if (ipout.ge.1) call partoutput(itime) ! dump particle positions
loutnext=loutnext+loutstep
loutstart=loutnext-loutaver/2
loutend=loutnext+loutaver/2
if (itime.eq.loutstart) then
weight=0.5
outnum=outnum+weight
call conccalc(itime,weight)
endif
! Check, whether particles are to be split:
! If so, create new particles and attribute all information from the old
! particles also to the new ones; old and new particles both get half the
! mass of the old ones
!************************************************************************
if (ldirect*itime.ge.ldirect*itsplit) then
n=numpart
do j=1,numpart
if (ldirect*itime.ge.ldirect*itrasplit(j)) then
if (n.lt.maxpart) then
n=n+1
itrasplit(j)=2*(itrasplit(j)-itramem(j))+itramem(j)
itrasplit(n)=itrasplit(j)
itramem(n)=itramem(j)
itra1(n)=itra1(j)
idt(n)=idt(j)
npoint(n)=npoint(j)
nclass(n)=nclass(j)
xtra1(n)=xtra1(j)
ytra1(n)=ytra1(j)
ztra1(n)=ztra1(j)
uap(n)=uap(j)
ucp(n)=ucp(j)
uzp(n)=uzp(j)
us(n)=us(j)
vs(n)=vs(j)
ws(n)=ws(j)
cbt(n)=cbt(j)
do ks=1,nspec
xmass1(j,ks)=xmass1(j,ks)/2.
xmass1(n,ks)=xmass1(j,ks)
end do
endif
endif
end do
numpart=n
endif
endif
endif
if (itime.eq.ideltas) exit ! almost finished
! Compute interval since radioactive decay of deposited mass was computed
!************************************************************************
if (itime.lt.loutnext) then
ldeltat=itime-(loutnext-loutstep)
else ! first half of next interval
ldeltat=itime-loutnext
endif
! Loop over all particles
!************************
do j=1,numpart
! If integration step is due, do it
!**********************************
if (itra1(j).eq.itime) then
if (ioutputforeachrelease.eq.1) then
kp=npoint(j)
else
kp=1
endif
! Determine age class of the particle
itage=abs(itra1(j)-itramem(j))
do nage=1,nageclass
if (itage.lt.lage(nage)) exit
end do
! Initialize newly released particle
!***********************************
if ((itramem(j).eq.itime).or.(itime.eq.0)) &
call initialize(itime,idt(j),uap(j),ucp(j),uzp(j), &
us(j),vs(j),ws(j),xtra1(j),ytra1(j),ztra1(j),cbt(j))
! Memorize particle positions
!****************************
xold=xtra1(j)
yold=ytra1(j)
zold=ztra1(j)
! Integrate Lagevin equation for lsynctime seconds
!*************************************************
call advance(itime,npoint(j),idt(j),uap(j),ucp(j),uzp(j), &
us(j),vs(j),ws(j),nstop,xtra1(j),ytra1(j),ztra1(j),prob, &
cbt(j))
! Calculate the gross fluxes across layer interfaces
!***************************************************
if (iflux.eq.1) call calcfluxes(nage,j,xold,yold,zold)
! Determine, when next time step is due
! If trajectory is terminated, mark it
!**************************************
if (nstop.gt.1) then
if (linit_cond.ge.1) call initial_cond_calc(itime,j)
itra1(j)=-999999999
else
itra1(j)=itime+lsynctime
! Dry deposition and radioactive decay for each species
! Also check maximum (of all species) of initial mass remaining on the particle;
! if it is below a threshold value, terminate particle
!*****************************************************************************
xmassfract=0.
do ks=1,nspec
if (decay(ks).gt.0.) then ! radioactive decay
decfact=exp(-real(abs(lsynctime))*decay(ks))
else
decfact=1.
endif
if (DRYDEPSPEC(ks)) then ! dry deposition
drydeposit(ks)=xmass1(j,ks)*prob(ks)*decfact
xmass1(j,ks)=xmass1(j,ks)*(1.-prob(ks))*decfact
if (decay(ks).gt.0.) then ! correct for decay (see wetdepo)
drydeposit(ks)=drydeposit(ks)* &
exp(real(abs(ldeltat))*decay(ks))
endif
else ! no dry deposition
xmass1(j,ks)=xmass1(j,ks)*decfact
endif
if (mdomainfill.eq.0) then
if (xmass(npoint(j),ks).gt.0.) &
xmassfract=max(xmassfract,real(npart(npoint(j)))* &
xmass1(j,ks)/xmass(npoint(j),ks))
else
xmassfract=1.
endif
end do
if (xmassfract.lt.0.0001) then ! terminate all particles carrying less mass
itra1(j)=-999999999
endif
! Sabine Eckhardt, June 2008
! don't create depofield for backward runs
if (DRYDEP.AND.(ldirect.eq.1)) then
call drydepokernel(nclass(j),drydeposit,real(xtra1(j)), &
real(ytra1(j)),nage,kp)
if (nested_output.eq.1) call drydepokernel_nest( &
nclass(j),drydeposit,real(xtra1(j)),real(ytra1(j)), &
nage,kp)
endif
! Terminate trajectories that are older than maximum allowed age
!***************************************************************
if (abs(itra1(j)-itramem(j)).ge.lage(nageclass)) then
if (linit_cond.ge.1) &
call initial_cond_calc(itime+lsynctime,j)
itra1(j)=-999999999
endif
endif
endif
end do
end do
! Complete the calculation of initial conditions for particles not yet terminated
!*****************************************************************************
do j=1,numpart
if (linit_cond.ge.1) call initial_cond_calc(itime,j)
end do
if (ipout.eq.2) call partoutput(itime) ! dump particle positions
if (linit_cond.ge.1) call initial_cond_output(itime) ! dump initial cond. field
close(104)
! De-allocate memory and end
!***************************
if (iflux.eq.1) then
deallocate(flux)
endif
if (OHREA.eqv..TRUE.) then
deallocate(OH_field,OH_field_height)
endif
if (ldirect.gt.0) then
deallocate(drygridunc,wetgridunc)
endif
deallocate(gridunc)
deallocate(xpoint1,xpoint2,ypoint1,ypoint2,zpoint1,zpoint2,xmass)
deallocate(ireleasestart,ireleaseend,npart,kindz)
deallocate(xmasssave)
if (nested_output.eq.1) then
deallocate(orooutn, arean, volumen)
if (ldirect.gt.0) then
deallocate(griduncn,drygriduncn,wetgriduncn)
endif
endif
deallocate(outheight,outheighthalf)
deallocate(oroout, area, volume)
end subroutine timemanager
|
