[16] | 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 calcmatrix(lconv,delt,cbmf) |
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| 23 | ! o i o |
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| 24 | !****************************************************************** |
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| 25 | ! This subroutine calculates the matrix describing convective |
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| 26 | ! redistribution of mass in a grid column, using the subroutine |
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| 27 | ! convect43c.f provided by Kerry Emanuel. |
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| 28 | ! |
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| 29 | ! Petra Seibert, Bernd C. Krueger, 2000-2001 |
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| 30 | ! |
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| 31 | ! changed by C. Forster, November 2003 - February 2004 |
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| 32 | ! array fmassfrac(nconvlevmax,nconvlevmax) represents |
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| 33 | ! the convective redistribution matrix for the particles |
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| 34 | ! |
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| 35 | ! 20 Oct 2005 - R. Easter - added calc of pconv_hpa(nconvlev+1) |
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| 36 | ! 16 Nov 2005 - R. Easter - pconv,phconv are set in convmix |
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| 37 | ! using pph & pphn |
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| 38 | ! |
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| 39 | !****************************************************************** |
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| 40 | |
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| 41 | ! lconv indicates whether there is convection in this cell, or not |
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| 42 | ! delt time step for convection [s] |
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| 43 | ! cbmf cloud base mass flux |
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| 44 | |
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| 45 | ! include 'includepar' |
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| 46 | ! include 'includecom' |
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| 47 | ! include 'includeconv' |
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| 48 | use par_mod |
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| 49 | use com_mod |
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| 50 | use conv_mod |
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| 51 | |
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| 52 | implicit none |
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| 53 | |
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| 54 | real :: rlevmass,summe |
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| 55 | |
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| 56 | integer :: iflag, k, kk, kuvz |
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| 57 | |
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| 58 | !1-d variables for convection |
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| 59 | !variables for redistribution matrix |
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| 60 | real :: cbmfold, precip, qprime |
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| 61 | real :: tprime, wd, f_qvsat |
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| 62 | real :: delt,cbmf |
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| 63 | logical :: lconv |
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| 64 | |
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| 65 | lconv = .false. |
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| 66 | |
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| 67 | |
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| 68 | ! calculate pressure at eta levels for use in convect |
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| 69 | ! and assign temp & spec. hum. to 1D workspace |
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| 70 | ! ------------------------------------------------------- |
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| 71 | |
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| 72 | ! pconv(1) is the pressure at the first level above ground |
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| 73 | ! phconv(k) is the pressure between levels k-1 and k |
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| 74 | ! dp(k) is the pressure difference "around" tconv(k) |
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| 75 | ! phconv(kmax) must also be defined 1/2 level above pconv(kmax) |
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| 76 | ! Therefore, we define k = kuvz-1 and let kuvz start from 2 |
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| 77 | ! top layer cannot be used for convection because p at top of this layer is |
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| 78 | ! not given |
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| 79 | |
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| 80 | |
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| 81 | ! phconv(1) = psconv |
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| 82 | ! Emanuel subroutine needs pressure in hPa, therefore convert all pressures |
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| 83 | do kuvz = 2,nuvz |
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| 84 | k = kuvz-1 |
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| 85 | ! pconv(k) = (akz(kuvz) + bkz(kuvz)*psconv) |
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| 86 | ! phconv(kuvz) = (akm(kuvz) + bkm(kuvz)*psconv) |
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| 87 | dpr(k) = phconv(k) - phconv(kuvz) |
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| 88 | qsconv(k) = f_qvsat( pconv(k), tconv(k) ) |
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| 89 | |
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| 90 | ! initialize mass fractions |
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| 91 | do kk=1,nconvlev |
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| 92 | fmassfrac(k,kk)=0. |
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| 93 | enddo |
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| 94 | enddo |
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| 95 | |
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| 96 | |
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| 97 | ! note that Emanuel says it is important |
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| 98 | ! a. to set this =0. every grid point |
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| 99 | ! b. to keep this value in the calling programme in the iteration |
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| 100 | |
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| 101 | ! CALL CONVECTION |
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| 102 | !****************** |
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| 103 | |
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| 104 | cbmfold = cbmf |
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| 105 | ! Convert pressures to hPa, as required by Emanuel scheme |
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| 106 | !********************************************************* |
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| 107 | do k=1,nconvlev+1 |
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| 108 | pconv_hpa(k)=pconv(k)/100. |
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| 109 | phconv_hpa(k)=phconv(k)/100. |
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| 110 | enddo |
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| 111 | pconv_hpa(nconvlev+1)=pconv(nconvlev+1)/100. |
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| 112 | phconv_hpa(nconvlev+1)=phconv(nconvlev+1)/100. |
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| 113 | call convect(nconvlevmax, nconvlev, delt, iflag, & |
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| 114 | precip, wd, tprime, qprime, cbmf) |
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| 115 | |
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| 116 | ! do not update fmassfrac and cloudbase massflux |
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| 117 | ! if no convection takes place or |
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| 118 | ! if a CFL criterion is violated in convect43c.f |
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| 119 | if (iflag .ne. 1 .and. iflag .ne. 4) then |
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| 120 | cbmf=cbmfold |
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| 121 | goto 200 |
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| 122 | endif |
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| 123 | |
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| 124 | ! do not update fmassfrac and cloudbase massflux |
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| 125 | ! if the old and the new cloud base mass |
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| 126 | ! fluxes are zero |
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| 127 | if (cbmf.le.0..and.cbmfold.le.0.) then |
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| 128 | cbmf=cbmfold |
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| 129 | goto 200 |
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| 130 | endif |
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| 131 | |
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| 132 | ! Update fmassfrac |
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| 133 | ! account for mass displaced from level k to level k |
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| 134 | |
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| 135 | lconv = .true. |
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| 136 | do k=1,nconvtop |
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| 137 | rlevmass = dpr(k)/ga |
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| 138 | summe = 0. |
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| 139 | do kk=1,nconvtop |
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| 140 | fmassfrac(k,kk) = delt*fmass(k,kk) |
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| 141 | summe = summe + fmassfrac(k,kk) |
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| 142 | end do |
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| 143 | fmassfrac(k,k)=fmassfrac(k,k) + rlevmass - summe |
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| 144 | end do |
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| 145 | |
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| 146 | 200 continue |
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| 147 | |
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| 148 | end subroutine calcmatrix |
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