[e200b7a] | 1 | subroutine wetdepo(itime,ltsample,loutnext) |
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[db712a8] | 2 | ! i i i |
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| 3 | !***************************************************************************** |
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| 4 | ! * |
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| 5 | ! Calculation of wet deposition using the concept of scavenging coefficients.* |
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| 6 | ! For lack of detailed information, washout and rainout are jointly treated. * |
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| 7 | ! It is assumed that precipitation does not occur uniformly within the whole * |
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| 8 | ! grid cell, but that only a fraction of the grid cell experiences rainfall. * |
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| 9 | ! This fraction is parameterized from total cloud cover and rates of large * |
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| 10 | ! scale and convective precipitation. * |
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| 11 | ! * |
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| 12 | ! Author: A. Stohl * |
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| 13 | ! * |
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| 14 | ! 1 December 1996 * |
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| 15 | ! * |
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| 16 | ! Correction by Petra Seibert, Sept 2002: * |
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| 17 | ! use centred precipitation data for integration * |
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| 18 | ! Code may not be correct for decay of deposition! * |
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| 19 | ! * |
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| 20 | !***************************************************************************** |
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| 21 | ! * |
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| 22 | ! Variables: * |
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| 23 | ! ix,jy indices of output grid cell for each particle * |
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| 24 | ! itime [s] actual simulation time [s] * |
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| 25 | ! jpart particle index * |
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| 26 | ! ldeltat [s] interval since radioactive decay was computed * |
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| 27 | ! loutnext [s] time for which gridded deposition is next output * |
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| 28 | ! loutstep [s] interval at which gridded deposition is output * |
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| 29 | ! ltsample [s] interval over which mass is deposited * |
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| 30 | ! wetdeposit mass that is wet deposited * |
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| 31 | ! wetgrid accumulated deposited mass on output grid * |
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| 32 | ! wetscav scavenging coefficient * |
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| 33 | ! * |
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| 34 | ! Constants: * |
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| 35 | ! * |
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| 36 | !***************************************************************************** |
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[e200b7a] | 37 | |
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| 38 | use point_mod |
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| 39 | use par_mod |
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| 40 | use com_mod |
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| 41 | |
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| 42 | implicit none |
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| 43 | |
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[db375cc] | 44 | integer :: jpart,itime,ltsample,loutnext,ldeltat |
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| 45 | integer :: itage,nage |
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[4fbe7a5] | 46 | integer :: ks, kp |
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[6985a98] | 47 | integer(selected_int_kind(16)), dimension(nspec) :: blc_count, inc_count |
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[c9cf570] | 48 | real :: grfraction(3),wetscav |
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[e200b7a] | 49 | real :: wetdeposit(maxspec),restmass |
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| 50 | real,parameter :: smallnum = tiny(0.0) ! smallest number that can be handled |
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[8a65cb0] | 51 | |
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[db712a8] | 52 | ! Compute interval since radioactive decay of deposited mass was computed |
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| 53 | !************************************************************************ |
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[e200b7a] | 54 | |
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| 55 | if (itime.le.loutnext) then |
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| 56 | ldeltat=itime-(loutnext-loutstep) |
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| 57 | else ! first half of next interval |
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| 58 | ldeltat=itime-loutnext |
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| 59 | endif |
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| 60 | |
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[db712a8] | 61 | ! Loop over all particles |
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| 62 | !************************ |
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[e200b7a] | 63 | |
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[c8fc724] | 64 | blc_count(:)=0 |
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| 65 | inc_count(:)=0 |
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[8a65cb0] | 66 | |
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[e200b7a] | 67 | do jpart=1,numpart |
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[4fbe7a5] | 68 | |
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[e200b7a] | 69 | if (itra1(jpart).eq.-999999999) goto 20 |
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| 70 | if(ldirect.eq.1)then |
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| 71 | if (itra1(jpart).gt.itime) goto 20 |
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| 72 | else |
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| 73 | if (itra1(jpart).lt.itime) goto 20 |
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| 74 | endif |
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[8a65cb0] | 75 | |
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[c9cf570] | 76 | ! Determine age class of the particle - nage is used for the kernel |
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[341f4b7] | 77 | !****************************************************************** |
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[c9cf570] | 78 | itage=abs(itra1(jpart)-itramem(jpart)) |
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| 79 | do nage=1,nageclass |
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| 80 | if (itage.lt.lage(nage)) goto 33 |
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| 81 | end do |
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| 82 | 33 continue |
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[d6a0977] | 83 | |
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[92a74b2] | 84 | do ks=1,nspec ! loop over species |
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[8a65cb0] | 85 | |
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[6985a98] | 86 | if (WETDEPSPEC(ks).eqv..false.) cycle |
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[db712a8] | 87 | |
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| 88 | !************************************************** |
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| 89 | ! CALCULATE DEPOSITION |
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| 90 | !************************************************** |
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[0539b8f] | 91 | ! wetscav=0. |
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[0e085a8] | 92 | |
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[7919911] | 93 | ! write(*,*) ks,dquer(ks), crain_aero(ks),csnow_aero(ks) |
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[0e085a8] | 94 | ! if (((dquer(ks).le.0.).and.(weta_gas(ks).gt.0..or.wetb_gas(ks).gt.0.)) & |
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| 95 | ! .or. & |
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| 96 | ! ((dquer(ks).gt.0.).and.(crain_aero(ks).gt.0..or.csnow_aero(ks).gt.0.).or. & |
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| 97 | ! (ccn_aero(ks).gt0) .or. (in_aero(ks).gt.0) .or. (henry(ks).gt.0))) then |
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[585a533] | 98 | |
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[92a74b2] | 99 | call get_wetscav(itime,ltsample,loutnext,jpart,ks,grfraction,inc_count,blc_count,wetscav) |
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[0e085a8] | 100 | |
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[e200b7a] | 101 | |
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[4fbe7a5] | 102 | if (wetscav.gt.0.) then |
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[e200b7a] | 103 | wetdeposit(ks)=xmass1(jpart,ks)* & |
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[5f9d14a] | 104 | (1.-exp(-wetscav*abs(ltsample)))*grfraction(1) ! wet deposition |
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[4fbe7a5] | 105 | else ! if no scavenging |
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| 106 | wetdeposit(ks)=0. |
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| 107 | endif |
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[c9cf570] | 108 | |
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[4fbe7a5] | 109 | restmass = xmass1(jpart,ks)-wetdeposit(ks) |
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| 110 | if (ioutputforeachrelease.eq.1) then |
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| 111 | kp=npoint(jpart) |
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| 112 | else |
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| 113 | kp=1 |
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| 114 | endif |
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| 115 | if (restmass .gt. smallnum) then |
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| 116 | xmass1(jpart,ks)=restmass |
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[db712a8] | 117 | ! depostatistic |
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| 118 | ! wetdepo_sum(ks,kp)=wetdepo_sum(ks,kp)+wetdeposit(ks) |
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| 119 | ! depostatistic |
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[4fbe7a5] | 120 | else |
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| 121 | xmass1(jpart,ks)=0. |
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| 122 | endif |
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[db712a8] | 123 | ! Correct deposited mass to the last time step when radioactive decay of |
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| 124 | ! gridded deposited mass was calculated |
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[4fbe7a5] | 125 | if (decay(ks).gt.0.) then |
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| 126 | wetdeposit(ks)=wetdeposit(ks)*exp(abs(ldeltat)*decay(ks)) |
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| 127 | endif |
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[f13406c] | 128 | |
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[7919911] | 129 | ! endif ! no deposition |
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[92a74b2] | 130 | end do ! loop over species |
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[e200b7a] | 131 | |
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[db712a8] | 132 | ! Sabine Eckhardt, June 2008 create deposition runs only for forward runs |
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| 133 | ! Add the wet deposition to accumulated amount on output grid and nested output grid |
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| 134 | !***************************************************************************** |
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[e200b7a] | 135 | |
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[4fbe7a5] | 136 | if (ldirect.eq.1) then |
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| 137 | call wetdepokernel(nclass(jpart),wetdeposit,real(xtra1(jpart)), & |
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[5f9d14a] | 138 | real(ytra1(jpart)),nage,kp) |
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[4fbe7a5] | 139 | if (nested_output.eq.1) call wetdepokernel_nest(nclass(jpart), & |
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[5f9d14a] | 140 | wetdeposit,real(xtra1(jpart)),real(ytra1(jpart)),nage,kp) |
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[4fbe7a5] | 141 | endif |
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[e200b7a] | 142 | |
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| 143 | 20 continue |
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[4fbe7a5] | 144 | end do ! all particles |
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[e200b7a] | 145 | |
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[db712a8] | 146 | ! count the total number of below-cloud and in-cloud occurences: |
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[c8fc724] | 147 | tot_blc_count(1:nspec)=tot_blc_count(1:nspec)+blc_count(1:nspec) |
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| 148 | tot_inc_count(1:nspec)=tot_inc_count(1:nspec)+inc_count(1:nspec) |
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[8a65cb0] | 149 | |
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[e200b7a] | 150 | end subroutine wetdepo |
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