source: flexpart.git/src/wetdepo.f90 @ 02095e3

devrelease-10univie
Last change on this file since 02095e3 was db375cc, checked in by Espen Sollum ATMOS <eso@…>, 2 years ago

Removed some unused variables

  • Property mode set to 100644
File size: 7.6 KB
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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
22subroutine wetdepo(itime,ltsample,loutnext)
23!                  i      i        i
24!*****************************************************************************
25!                                                                            *
26! Calculation of wet deposition using the concept of scavenging coefficients.*
27! For lack of detailed information, washout and rainout are jointly treated. *
28! It is assumed that precipitation does not occur uniformly within the whole *
29! grid cell, but that only a fraction of the grid cell experiences rainfall. *
30! This fraction is parameterized from total cloud cover and rates of large   *
31! scale and convective precipitation.                                        *
32!                                                                            *
33!    Author: A. Stohl                                                        *
34!                                                                            *
35!    1 December 1996                                                         *
36!                                                                            *
37! Correction by Petra Seibert, Sept 2002:                                    *
38! use centred precipitation data for integration                             *
39! Code may not be correct for decay of deposition!                           *
40!                                                                            *
41!*****************************************************************************
42!                                                                            *
43! Variables:                                                                 *
44! ix,jy              indices of output grid cell for each particle           *
45! itime [s]          actual simulation time [s]                              *
46! jpart              particle index                                          *
47! ldeltat [s]        interval since radioactive decay was computed           *
48! loutnext [s]       time for which gridded deposition is next output        *
49! loutstep [s]       interval at which gridded deposition is output          *
50! ltsample [s]       interval over which mass is deposited                   *
51! wetdeposit         mass that is wet deposited                              *
52! wetgrid            accumulated deposited mass on output grid               *
53! wetscav            scavenging coefficient                                  *
54!                                                                            *
55! Constants:                                                                 *
56!                                                                            *
57!*****************************************************************************
58
59  use point_mod
60  use par_mod
61  use com_mod
62
63  implicit none
64
65  integer :: jpart,itime,ltsample,loutnext,ldeltat
66  integer :: itage,nage
67  integer :: ks, kp
68  integer(selected_int_kind(16)), dimension(nspec) :: blc_count, inc_count
69  real :: grfraction(3),wetscav
70  real :: wetdeposit(maxspec),restmass
71  real,parameter :: smallnum = tiny(0.0) ! smallest number that can be handled
72
73! Compute interval since radioactive decay of deposited mass was computed
74!************************************************************************
75
76  if (itime.le.loutnext) then
77    ldeltat=itime-(loutnext-loutstep)
78  else                                  ! first half of next interval
79    ldeltat=itime-loutnext
80  endif
81
82! Loop over all particles
83!************************
84
85  blc_count(:)=0
86  inc_count(:)=0
87
88  do jpart=1,numpart
89
90    if (itra1(jpart).eq.-999999999) goto 20
91    if(ldirect.eq.1)then
92      if (itra1(jpart).gt.itime) goto 20
93    else
94      if (itra1(jpart).lt.itime) goto 20
95    endif
96
97! Determine age class of the particle - nage is used for the kernel
98!******************************************************************
99     itage=abs(itra1(jpart)-itramem(jpart))
100     do nage=1,nageclass
101       if (itage.lt.lage(nage)) goto 33
102     end do
103 33  continue
104
105    do ks=1,nspec      ! loop over species
106
107      if (WETDEPSPEC(ks).eqv..false.) cycle
108
109!**************************************************
110! CALCULATE DEPOSITION
111!**************************************************
112!       wetscav=0.
113       
114!        write(*,*) ks,dquer(ks), crain_aero(ks),csnow_aero(ks)
115!       if (((dquer(ks).le.0.).and.(weta_gas(ks).gt.0..or.wetb_gas(ks).gt.0.)) &
116!          .or. &
117!          ((dquer(ks).gt.0.).and.(crain_aero(ks).gt.0..or.csnow_aero(ks).gt.0.).or. &
118!            (ccn_aero(ks).gt0) .or. (in_aero(ks).gt.0) .or. (henry(ks).gt.0)))  then
119
120      call get_wetscav(itime,ltsample,loutnext,jpart,ks,grfraction,inc_count,blc_count,wetscav)
121     
122
123      if (wetscav.gt.0.) then
124        wetdeposit(ks)=xmass1(jpart,ks)* &
125             (1.-exp(-wetscav*abs(ltsample)))*grfraction(1)  ! wet deposition
126      else ! if no scavenging
127        wetdeposit(ks)=0.
128      endif
129 
130      restmass = xmass1(jpart,ks)-wetdeposit(ks)
131      if (ioutputforeachrelease.eq.1) then
132        kp=npoint(jpart)
133      else
134        kp=1
135      endif
136      if (restmass .gt. smallnum) then
137        xmass1(jpart,ks)=restmass
138!   depostatistic
139!   wetdepo_sum(ks,kp)=wetdepo_sum(ks,kp)+wetdeposit(ks)
140!   depostatistic
141      else
142        xmass1(jpart,ks)=0.
143      endif
144!   Correct deposited mass to the last time step when radioactive decay of
145!   gridded deposited mass was calculated
146      if (decay(ks).gt.0.) then
147        wetdeposit(ks)=wetdeposit(ks)*exp(abs(ldeltat)*decay(ks))
148      endif
149
150!    endif ! no deposition
151    end do ! loop over species
152
153! Sabine Eckhardt, June 2008 create deposition runs only for forward runs
154! Add the wet deposition to accumulated amount on output grid and nested output grid
155!*****************************************************************************
156
157    if (ldirect.eq.1) then
158      call wetdepokernel(nclass(jpart),wetdeposit,real(xtra1(jpart)), &
159           real(ytra1(jpart)),nage,kp)
160      if (nested_output.eq.1) call wetdepokernel_nest(nclass(jpart), &
161           wetdeposit,real(xtra1(jpart)),real(ytra1(jpart)),nage,kp)
162    endif
163
16420  continue
165  end do ! all particles
166
167! count the total number of below-cloud and in-cloud occurences:
168  tot_blc_count(1:nspec)=tot_blc_count(1:nspec)+blc_count(1:nspec)
169  tot_inc_count(1:nspec)=tot_inc_count(1:nspec)+inc_count(1:nspec)
170
171end subroutine wetdepo
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