| 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 wetdepo(itime,ltsample,loutnext) |
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| 23 | ! i i i |
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| 24 | !***************************************************************************** |
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| 25 | ! * |
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| 26 | ! Calculation of wet deposition using the concept of scavenging coefficients.* |
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| 27 | ! For lack of detailed information, washout and rainout are jointly treated. * |
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| 28 | ! It is assumed that precipitation does not occur uniformly within the whole * |
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| 29 | ! grid cell, but that only a fraction of the grid cell experiences rainfall. * |
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| 30 | ! This fraction is parameterized from total cloud cover and rates of large * |
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| 31 | ! scale and convective precipitation. * |
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| 32 | ! * |
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| 33 | ! Author: A. Stohl * |
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| 34 | ! * |
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| 35 | ! 1 December 1996 * |
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| 36 | ! * |
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| 37 | ! Correction by Petra Seibert, Sept 2002: * |
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| 38 | ! use centred precipitation data for integration * |
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| 39 | ! Code may not be correct for decay of deposition! * |
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| 40 | ! * |
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| 41 | ! Modification by Sabine Eckhart to introduce a new in-/below-cloud |
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| 42 | ! scheme, not dated |
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| 43 | ! Petra Seibert, 2011/2012: Fixing some deficiencies in this modification |
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| 44 | !***************************************************************************** |
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| 45 | ! * |
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| 46 | ! Variables: * |
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| 47 | ! cc [0-1] total cloud cover * |
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| 48 | ! convp [mm/h] convective precipitation rate * |
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| 49 | ! grfraction [0-1] fraction of grid, for which precipitation occurs * |
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| 50 | ! ix,jy indices of output grid cell for each particle * |
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| 51 | ! itime [s] actual simulation time [s] * |
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| 52 | ! jpart particle index * |
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| 53 | ! ldeltat [s] interval since radioactive decay was computed * |
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| 54 | ! lfr, cfr area fraction covered by precipitation for large scale * |
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| 55 | ! and convective precipitation (dependent on prec. rate) * |
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| 56 | ! loutnext [s] time for which gridded deposition is next output * |
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| 57 | ! loutstep [s] interval at which gridded deposition is output * |
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| 58 | ! lsp [mm/h] large scale precipitation rate * |
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| 59 | ! ltsample [s] interval over which mass is deposited * |
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| 60 | ! prec [mm/h] precipitation rate in subgrid, where precipitation occurs* |
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| 61 | ! wetdeposit mass that is wet deposited * |
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| 62 | ! wetgrid accumulated deposited mass on output grid * |
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| 63 | ! wetscav scavenging coefficient * |
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| 64 | ! * |
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| 65 | ! Constants: * |
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| 66 | ! * |
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| 67 | !***************************************************************************** |
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| 68 | |
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| 69 | use point_mod |
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| 70 | use par_mod |
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| 71 | use com_mod |
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| 72 | |
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| 73 | implicit none |
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| 74 | |
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| 75 | integer :: jpart,itime,ltsample,loutnext,ldeltat,i,j,ix,jy |
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| 76 | integer :: ngrid,itage,nage,hz,il,interp_time, n , clouds_v !NIK scheme |
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| 77 | integer :: kz !PS scheme |
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| 78 | integer :: ks, kp, n1,n2, icbot,ictop, indcloud |
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| 79 | integer :: scheme_number ! NIK==1, PS ==2 |
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| 80 | real :: S_i, act_temp, cl, cle ! in cloud scavenging |
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| 81 | real :: clouds_h ! cloud height for the specific grid point |
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| 82 | real :: xtn,ytn,lsp,convp,cc,grfraction,prec,wetscav, precsub,f |
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| 83 | real :: wetdeposit(maxspec),restmass |
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| 84 | real,parameter :: smallnum = tiny(0.0) ! smallest number that can be handled |
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| 85 | save lfr,cfr |
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| 86 | |
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| 87 | |
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| 88 | real :: lfr(5) = (/ 0.5,0.65,0.8,0.9,0.95/) |
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| 89 | real :: cfr(5) = (/ 0.4,0.55,0.7,0.8,0.9 /) |
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| 90 | |
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| 91 | ! Compute interval since radioactive decay of deposited mass was computed |
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| 92 | !************************************************************************ |
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| 93 | |
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| 94 | if (itime.le.loutnext) then |
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| 95 | ldeltat=itime-(loutnext-loutstep) |
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| 96 | else ! first half of next interval |
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| 97 | ldeltat=itime-loutnext |
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| 98 | endif |
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| 99 | |
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| 100 | |
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| 101 | ! Loop over all particles |
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| 102 | !************************ |
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| 103 | |
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| 104 | do jpart=1,numpart |
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| 105 | if (itra1(jpart).eq.-999999999) goto 20 |
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| 106 | if(ldirect.eq.1)then |
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| 107 | if (itra1(jpart).gt.itime) goto 20 |
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| 108 | else |
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| 109 | if (itra1(jpart).lt.itime) goto 20 |
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| 110 | endif |
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| 111 | ! Determine age class of the particle |
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| 112 | itage=abs(itra1(jpart)-itramem(jpart)) |
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| 113 | do nage=1,nageclass |
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| 114 | if (itage.lt.lage(nage)) goto 33 |
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| 115 | end do |
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| 116 | 33 continue |
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| 117 | |
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| 118 | |
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| 119 | ! Determine which nesting level to be used |
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| 120 | !***************************************** |
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| 121 | |
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| 122 | ngrid=0 |
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| 123 | do j=numbnests,1,-1 |
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| 124 | if ((xtra1(jpart).gt.xln(j)).and.(xtra1(jpart).lt.xrn(j)).and. & |
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| 125 | (ytra1(jpart).gt.yln(j)).and.(ytra1(jpart).lt.yrn(j))) then |
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| 126 | ngrid=j |
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| 127 | goto 23 |
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| 128 | endif |
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| 129 | end do |
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| 130 | 23 continue |
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| 131 | |
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| 132 | |
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| 133 | ! Determine nested grid coordinates |
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| 134 | !********************************** |
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| 135 | |
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| 136 | if (ngrid.gt.0) then |
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| 137 | xtn=(xtra1(jpart)-xln(ngrid))*xresoln(ngrid) |
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| 138 | ytn=(ytra1(jpart)-yln(ngrid))*yresoln(ngrid) |
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| 139 | ix=int(xtn) |
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| 140 | jy=int(ytn) |
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| 141 | else |
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| 142 | ix=int(xtra1(jpart)) |
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| 143 | jy=int(ytra1(jpart)) |
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| 144 | endif |
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| 145 | |
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| 146 | |
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| 147 | ! Interpolate large scale precipitation, convective precipitation and |
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| 148 | ! total cloud cover |
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| 149 | ! Note that interpolated time refers to itime-0.5*ltsample [PS] |
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| 150 | !******************************************************************** |
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| 151 | interp_time=nint(itime-0.5*ltsample) |
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| 152 | |
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| 153 | ! PS nest case still needs to be implemented!! |
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| 154 | ! if (ngrid.eq.0) then |
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| 155 | ! call interpol_rain(lsprec,convprec,tcc,nxmax,nymax, & |
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| 156 | ! 1,nx,ny,memind,real(xtra1(jpart)),real(ytra1(jpart)),1, & |
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| 157 | ! memtime(1),memtime(2),interp_time,lsp,convp,cc) |
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| 158 | call interpol_rain(lsprec,convprec,tcc, & |
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| 159 | icloudbot,icloudthck,nxmax,nymax,1,nx,ny, & |
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| 160 | memind,sngl(xtra1(jpart)),sngl(ytra1(jpart)),1,memtime(1), & |
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| 161 | memtime(2),interp_time,lsp,convp,cc,icbot,ictop,icmv) |
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| 162 | ! else |
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| 163 | ! call interpol_rain_nests(lsprecn,convprecn,tccn, & |
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| 164 | ! nxmaxn,nymaxn,1,maxnests,ngrid,nxn,nyn,memind,xtn,ytn,1, & |
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| 165 | ! memtime(1),memtime(2),interp_time,lsp,convp,cc) |
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| 166 | ! endif |
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| 167 | |
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| 168 | |
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| 169 | ! if ((lsp.lt.0.01).and.(convp.lt.0.01)) goto 20 |
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| 170 | !PS 2012: subtract a small value, eg 0.01 mm/h, to remove spurious precip |
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| 171 | prec = lsp+convp |
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| 172 | precsub = 0.01 |
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| 173 | if (prec .lt. precsub) then |
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| 174 | goto 20 |
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| 175 | else |
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| 176 | f = (prec-precsub)/prec |
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| 177 | lsp = f*lsp |
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| 178 | convp = f*convp |
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| 179 | endif |
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| 180 | |
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| 181 | |
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| 182 | ! get the level were the actual particle is in |
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| 183 | do il=2,nz |
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| 184 | if (height(il).gt.ztra1(jpart)) then |
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| 185 | !hz=il-1 |
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| 186 | kz=il-1 |
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| 187 | goto 26 |
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| 188 | endif |
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| 189 | end do |
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| 190 | 26 continue |
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| 191 | |
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| 192 | n=memind(2) |
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| 193 | if (abs(memtime(1)-interp_time).lt.abs(memtime(2)-interp_time)) & |
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| 194 | n=memind(1) |
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| 195 | |
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| 196 | ! if there is no precipitation or the particle is above the clouds no |
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| 197 | ! scavenging is done |
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| 198 | |
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| 199 | !old scheme |
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| 200 | ! if (ngrid.eq.0) then |
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| 201 | ! clouds_v=clouds(ix,jy,hz,n) |
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| 202 | ! clouds_h=cloudsh(ix,jy,n) |
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| 203 | ! else |
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| 204 | ! clouds_v=cloudsn(ix,jy,hz,n,ngrid) |
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| 205 | ! clouds_h=cloudsnh(ix,jy,n,ngrid) |
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| 206 | ! endif |
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| 207 | ! !write(*,*) 'there is |
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| 208 | ! ! + precipitation',(clouds(ix,jy,ihz,n),ihz=1,20),lsp,convp,hz |
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| 209 | ! if (clouds_v.le.1) goto 20 |
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| 210 | ! !write (*,*) 'there is scavenging' |
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| 211 | |
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| 212 | ! PS: part of 2011/2012 fix |
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| 213 | |
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| 214 | if (ztra1(jpart) .le. float(ictop)) then |
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| 215 | if (ztra1(jpart) .gt. float(icbot)) then |
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| 216 | indcloud = 2 ! in-cloud |
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| 217 | else |
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| 218 | indcloud = 1 ! below-cloud |
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| 219 | endif |
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| 220 | elseif (ictop .eq. icmv) then |
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| 221 | indcloud = 0 ! no cloud found, use old scheme |
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| 222 | else |
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| 223 | goto 20 ! above cloud |
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| 224 | endif |
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| 225 | |
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| 226 | |
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| 227 | ! 1) Parameterization of the the area fraction of the grid cell where the |
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| 228 | ! precipitation occurs: the absolute limit is the total cloud cover, but |
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| 229 | ! for low precipitation rates, an even smaller fraction of the grid cell |
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| 230 | ! is used. Large scale precipitation occurs over larger areas than |
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| 231 | ! convective precipitation. |
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| 232 | !************************************************************************** |
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| 233 | |
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| 234 | if (lsp.gt.20.) then |
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| 235 | i=5 |
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| 236 | else if (lsp.gt.8.) then |
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| 237 | i=4 |
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| 238 | else if (lsp.gt.3.) then |
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| 239 | i=3 |
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| 240 | else if (lsp.gt.1.) then |
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| 241 | i=2 |
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| 242 | else |
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| 243 | i=1 |
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| 244 | endif |
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| 245 | |
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| 246 | if (convp.gt.20.) then |
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| 247 | j=5 |
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| 248 | else if (convp.gt.8.) then |
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| 249 | j=4 |
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| 250 | else if (convp.gt.3.) then |
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| 251 | j=3 |
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| 252 | else if (convp.gt.1.) then |
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| 253 | j=2 |
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| 254 | else |
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| 255 | j=1 |
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| 256 | endif |
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| 257 | |
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| 258 | grfraction=max(0.05,cc*(lsp*lfr(i)+convp*cfr(j))/(lsp+convp)) |
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| 259 | |
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| 260 | ! 2) Computation of precipitation rate in sub-grid cell |
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| 261 | !****************************************************** |
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| 262 | |
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| 263 | prec=(lsp+convp)/grfraction |
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| 264 | |
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| 265 | ! 3) Computation of scavenging coefficients for all species |
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| 266 | ! Computation of wet deposition |
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| 267 | !********************************************************** |
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| 268 | |
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| 269 | do ks=1,nspec ! loop over species |
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| 270 | wetdeposit(ks)=0. |
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| 271 | |
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| 272 | |
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| 273 | !conflicting changes to the same routine: 1=NIK 2 =PS |
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| 274 | scheme_number=2 |
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| 275 | if (scheme_number.eq.1) then !NIK |
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| 276 | |
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| 277 | if (weta(ks).gt.0.) then |
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| 278 | if (clouds_v.ge.4) then |
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| 279 | ! BELOW CLOUD SCAVENGING |
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| 280 | ! for aerosols and not highliy soluble substances weta=5E-6 |
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| 281 | wetscav=weta(ks)*prec**wetb(ks) ! scavenging coeff. |
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| 282 | ! write(*,*) 'bel. wetscav: ',wetscav |
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| 283 | |
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| 284 | else ! below_cloud clouds_v is lt 4 and gt 1 -> in cloud scavenging |
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| 285 | ! IN CLOUD SCAVENGING |
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| 286 | ! BUGFIX tt for nested fields should be ttn |
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| 287 | ! sec may 2008 |
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| 288 | if (ngrid.gt.0) then |
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| 289 | act_temp=ttn(ix,jy,hz,n,ngrid) |
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| 290 | else |
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| 291 | act_temp=tt(ix,jy,hz,n) |
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| 292 | endif |
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| 293 | |
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| 294 | ! NIK 31.01.2013: SPECIES defined parameters for the in-cloud scavening |
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| 295 | ! weta_in=2.0E-07 (default) |
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| 296 | ! wetb_in=0.36 (default) |
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| 297 | ! wetc_in=0.9 (default) |
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| 298 | ! wetd_in: Scaling factor for the total in-cloud scavenging (default 1.0-no scaling) |
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| 299 | cl=weta_in(ks)*prec**wetb_in(ks) |
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| 300 | if (dquer(ks).gt.0) then ! is particle |
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| 301 | S_i=wetc_in(ks)/cl |
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| 302 | else ! is gas |
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| 303 | cle=(1-cl)/(henry(ks)*(r_air/3500.)*act_temp)+cl |
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| 304 | S_i=1/cle |
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| 305 | endif |
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| 306 | wetscav=S_i*prec/3.6E6/clouds_h/wetd_in(ks) |
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| 307 | ! write(*,*) 'in. wetscav:' |
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| 308 | ! + ,wetscav,cle,cl,act_temp,prec,clouds_h |
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| 309 | endif |
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| 310 | |
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| 311 | |
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| 312 | ! if (wetscav.le.0) write (*,*) 'neg, or 0 wetscav!' |
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| 313 | ! + ,wetscav,cle,cl,act_temp,prec,clouds_h,clouds_v |
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| 314 | wetdeposit(ks)=xmass1(jpart,ks)* & |
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| 315 | (1.-exp(-wetscav*abs(ltsample)))*grfraction ! wet deposition |
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| 316 | ! new particle mass: |
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| 317 | ! if (wetdeposit(ks).gt.0) then |
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| 318 | ! write(*,*) 'wetdepo: ',wetdeposit(ks),ks |
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| 319 | ! endif |
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| 320 | restmass = xmass1(jpart,ks)-wetdeposit(ks) |
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| 321 | if (ioutputforeachrelease.eq.1) then |
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| 322 | kp=npoint(jpart) |
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| 323 | else |
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| 324 | kp=1 |
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| 325 | endif |
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| 326 | if (restmass .gt. smallnum) then |
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| 327 | xmass1(jpart,ks)=restmass |
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| 328 | !ccccccccccccccc depostatistic |
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| 329 | ! wetdepo_sum(ks,kp)=wetdepo_sum(ks,kp)+wetdeposit(ks) |
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| 330 | !ccccccccccccccc depostatistic |
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| 331 | else |
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| 332 | xmass1(jpart,ks)=0. |
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| 333 | endif |
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| 334 | ! Correct deposited mass to the last time step when radioactive decay of |
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| 335 | ! gridded deposited mass was calculated |
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| 336 | if (decay(ks).gt.0.) then |
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| 337 | wetdeposit(ks)=wetdeposit(ks) & |
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| 338 | *exp(abs(ldeltat)*decay(ks)) |
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| 339 | endif |
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| 340 | else ! weta(k) |
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| 341 | wetdeposit(ks)=0. |
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| 342 | endif ! weta(k) |
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| 343 | |
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| 344 | elseif (scheme_number.eq.2) then ! PS |
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| 345 | |
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| 346 | !PS indcloud=0 ! Use this for FOR TESTING, |
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| 347 | !PS will skip the new in/below cloud method !!! |
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| 348 | |
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| 349 | if (weta(ks).gt.0.) then |
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| 350 | if (indcloud .eq. 1) then ! BELOW CLOUD SCAVENGING |
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| 351 | !C for aerosols and not highliy soluble substances weta=5E-6 |
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| 352 | wetscav=weta(ks)*prec**wetb(ks) ! scavenging coeff. |
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| 353 | !c write(*,*) 'bel. wetscav: ',wetscav |
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| 354 | elseif (indcloud .eq. 2) then ! IN CLOUD SCAVENGING |
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| 355 | if (ngrid.gt.0) then |
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| 356 | act_temp=ttn(ix,jy,kz,n,ngrid) |
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| 357 | else |
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| 358 | act_temp=tt(ix,jy,kz,n) |
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| 359 | endif |
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| 360 | |
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| 361 | ! from NIK |
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| 362 | ! weta_in=2.0E-07 (default) |
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| 363 | ! wetb_in=0.36 (default) |
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| 364 | ! wetc_in=0.9 (default) |
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| 365 | |
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| 366 | |
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| 367 | cl=2E-7*prec**0.36 |
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| 368 | if (dquer(ks).gt.0) then ! is particle |
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| 369 | S_i=0.9/cl |
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| 370 | else ! is gas |
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| 371 | cle=(1-cl)/(henry(ks)*(r_air/3500.)*act_temp)+cl |
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| 372 | S_i=1/cle |
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| 373 | endif |
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| 374 | wetscav=S_i*prec/3.6E6/(ictop-icbot) ! 3.6e6 converts mm/h to m/s |
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| 375 | else ! PS: no cloud diagnosed, old scheme, |
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| 376 | !CPS using with fixed a,b for simplicity, one may wish to change!! |
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| 377 | wetscav = 1.e-4*prec**0.62 |
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| 378 | endif |
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| 379 | |
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| 380 | |
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| 381 | wetdeposit(ks)=xmass1(jpart,ks)* & |
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| 382 | ! (1.-exp(-wetscav*abs(ltsample)))*fraction ! wet deposition |
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| 383 | (1.-exp(-wetscav*abs(ltsample)))*grfraction ! fraction = grfraction (PS) |
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| 384 | restmass = xmass1(jpart,ks)-wetdeposit(ks) |
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| 385 | if (ioutputforeachrelease.eq.1) then |
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| 386 | kp=npoint(jpart) |
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| 387 | else |
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| 388 | kp=1 |
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| 389 | endif |
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| 390 | if (restmass .gt. smallnum) then |
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| 391 | xmass1(jpart,ks)=restmass |
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| 392 | !cccccccccccccccc depostatistic |
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| 393 | !c wetdepo_sum(ks,kp)=wetdepo_sum(ks,kp)+wetdeposit(ks) |
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| 394 | !cccccccccccccccc depostatistic |
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| 395 | else |
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| 396 | xmass1(jpart,ks)=0. |
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| 397 | endif |
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| 398 | !C Correct deposited mass to the last time step when radioactive decay of |
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| 399 | !C gridded deposited mass was calculated |
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| 400 | if (decay(ks).gt.0.) then |
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| 401 | wetdeposit(ks)=wetdeposit(ks)*exp(abs(ldeltat)*decay(ks)) |
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| 402 | endif |
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| 403 | else ! weta(k)<0 |
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| 404 | wetdeposit(ks)=0. |
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| 405 | endif |
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| 406 | |
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| 407 | endif !on scheme |
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| 408 | |
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| 409 | |
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| 410 | |
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| 411 | end do |
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| 412 | |
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| 413 | ! Sabine Eckhard, June 2008 create deposition runs only for forward runs |
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| 414 | ! Add the wet deposition to accumulated amount on output grid and nested output grid |
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| 415 | !***************************************************************************** |
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| 416 | |
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| 417 | ! if (ldirect.eq.1) then |
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| 418 | ! call wetdepokernel(nclass(jpart),wetdeposit,real(xtra1(jpart)), & |
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| 419 | ! real(ytra1(jpart)),nage,kp) |
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| 420 | ! if (nested_output.eq.1) call wetdepokernel_nest(nclass(jpart), & |
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| 421 | ! wetdeposit,real(xtra1(jpart)),real(ytra1(jpart)), & |
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| 422 | ! nage,kp) |
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| 423 | ! endif |
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| 424 | |
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| 425 | !PS |
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| 426 | if (ldirect.eq.1) then |
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| 427 | call wetdepokernel(nclass(jpart),wetdeposit, & |
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| 428 | sngl(xtra1(jpart)),sngl(ytra1(jpart)),nage,kp) |
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| 429 | if (nested_output.eq.1) & |
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| 430 | call wetdepokernel_nest(nclass(jpart),wetdeposit, & |
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| 431 | sngl(xtra1(jpart)),sngl(ytra1(jpart)),nage,kp) |
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| 432 | endif |
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| 433 | |
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| 434 | |
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| 435 | 20 continue |
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| 436 | end do |
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| 437 | |
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| 438 | end subroutine wetdepo |
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