| 1 | MODULE lmdz_thermcell_down |
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| 2 | CONTAINS |
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| 3 | |
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| 4 | SUBROUTINE thermcell_updown_dq(ngrid, nlay, ptimestep, lmax, eup, dup, edn, ddn, masse, trac, dtrac) |
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| 5 | |
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| 6 | USE lmdz_thermcell_ini, ONLY: iflag_thermals_down |
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| 7 | |
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| 8 | |
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| 9 | !----------------------------------------------------------------- |
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| 10 | ! thermcell_updown_dq: computes the tendency of tracers associated |
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| 11 | ! with the presence of convective up/down drafts |
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| 12 | ! This routine that has been collectively written during the |
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| 13 | ! "ateliers downdrafts" in 2022/2023 |
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| 14 | ! Maelle, Frédéric, Catherine, Fleur, Florent, Etienne |
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| 15 | !------------------------------------------------------------------ |
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| 16 | |
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| 17 | USE lmdz_abort_physic, ONLY: abort_physic |
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| 18 | IMPLICIT NONE |
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| 19 | |
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| 20 | ! declarations |
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| 21 | !============================================================== |
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| 22 | |
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| 23 | ! input/output |
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| 24 | |
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| 25 | INTEGER, INTENT(IN) :: ngrid ! number of horizontal grid points |
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| 26 | INTEGER, INTENT(IN) :: nlay ! number of vertical layers |
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| 27 | REAL, INTENT(IN) :: ptimestep ! time step of the physics [s] |
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| 28 | REAL, INTENT(IN), DIMENSION(ngrid, nlay) :: eup ! entrainment to updrafts * dz [same unit as flux] |
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| 29 | REAL, INTENT(IN), DIMENSION(ngrid, nlay) :: dup ! detrainment from updrafts * dz [same unit as flux] |
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| 30 | REAL, INTENT(IN), DIMENSION(ngrid, nlay) :: edn ! entrainment to downdrafts * dz [same unit as flux] |
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| 31 | REAL, INTENT(IN), DIMENSION(ngrid, nlay) :: ddn ! detrainment from downdrafts * dz [same unit as flux] |
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| 32 | REAL, INTENT(IN), DIMENSION(ngrid, nlay) :: masse ! mass of layers = rho dz |
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| 33 | REAL, INTENT(IN), DIMENSION(ngrid, nlay) :: trac ! tracer |
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| 34 | INTEGER, INTENT(IN), DIMENSION(ngrid) :: lmax ! max level index at which downdraft are present |
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| 35 | REAL, INTENT(OUT), DIMENSION(ngrid, nlay) :: dtrac ! tendance du traceur |
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| 36 | |
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| 37 | |
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| 38 | ! Local |
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| 39 | |
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| 40 | REAL, DIMENSION(ngrid, nlay + 1) :: fup, fdn, fc, fthu, fthd, fthe, fthtot |
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| 41 | REAL, DIMENSION(ngrid, nlay) :: tracu, tracd, traci, tracold |
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| 42 | REAL :: www, mstar_inv |
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| 43 | INTEGER ig, ilay |
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| 44 | REAL, DIMENSION(ngrid, nlay) :: s1, s2, num !coefficients pour la resolution implicite |
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| 45 | INTEGER :: iflag_impl = 1 ! 0 pour explicite, 1 pour implicite "classique", 2 pour implicite avec entrainement et detrainement |
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| 46 | |
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| 47 | fdn(:, :) = 0. |
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| 48 | fup(:, :) = 0. |
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| 49 | fc(:, :) = 0. |
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| 50 | fthu(:, :) = 0. |
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| 51 | fthd(:, :) = 0. |
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| 52 | fthe(:, :) = 0. |
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| 53 | fthtot(:, :) = 0. |
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| 54 | tracd(:, :) = 0. |
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| 55 | tracu(:, :) = 0. |
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| 56 | traci(:, :) = trac(:, :) |
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| 57 | tracold(:, :) = trac(:, :) |
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| 58 | s1(:, :) = 0. |
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| 59 | s2(:, :) = 0. |
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| 60 | num(:, :) = 1. |
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| 61 | |
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| 62 | IF (iflag_thermals_down < 10) THEN |
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| 63 | CALL abort_physic("thermcell_updown_dq", & |
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| 64 | 'thermcell_down_dq = 0 or >= 10', 1) |
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| 65 | else |
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| 66 | iflag_impl = iflag_thermals_down - 10 |
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| 67 | endif |
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| 68 | |
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| 69 | |
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| 70 | ! lmax : indice tel que fu(kmax+1)=0 |
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| 71 | ! Dans ce cas, pas besoin d'initialiser tracd(lmax) ( =trac(lmax) ) |
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| 72 | ! Boucle pour le downdraft |
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| 73 | do ilay = nlay, 1, -1 |
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| 74 | do ig = 1, ngrid |
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| 75 | !if ( lmax(ig) > nlay - 2 ) stop "les thermiques montent trop haut" |
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| 76 | IF (ilay<=lmax(ig) .AND. lmax(ig)>1) THEN |
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| 77 | fdn(ig, ilay) = fdn(ig, ilay + 1) + edn(ig, ilay) - ddn(ig, ilay) |
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| 78 | IF (fdn(ig, ilay) + ddn(ig, ilay) > 0.) THEN |
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| 79 | www = fdn(ig, ilay + 1) / (fdn(ig, ilay) + ddn(ig, ilay)) |
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| 80 | else |
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| 81 | www = 0. |
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| 82 | endif |
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| 83 | tracd(ig, ilay) = www * tracd(ig, ilay + 1) + (1. - www) * trac(ig, ilay) |
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| 84 | endif |
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| 85 | enddo |
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| 86 | enddo !Fin boucle sur l'updraft |
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| 87 | fdn(:, 1) = 0. |
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| 88 | |
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| 89 | !Boucle pour l'updraft |
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| 90 | do ilay = 1, nlay, 1 |
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| 91 | do ig = 1, ngrid |
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| 92 | IF (ilay<lmax(ig) .AND. lmax(ig)>1) THEN |
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| 93 | fup(ig, ilay + 1) = fup(ig, ilay) + eup(ig, ilay) - dup(ig, ilay) |
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| 94 | IF (fup(ig, ilay + 1) + dup(ig, ilay) > 0.) THEN |
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| 95 | www = fup(ig, ilay) / (fup(ig, ilay + 1) + dup(ig, ilay)) |
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| 96 | else |
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| 97 | www = 0. |
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| 98 | endif |
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| 99 | IF (ilay == 1) THEN |
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| 100 | tracu(ig, ilay) = trac(ig, ilay) |
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| 101 | else |
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| 102 | tracu(ig, ilay) = www * tracu(ig, ilay - 1) + (1. - www) * trac(ig, ilay) |
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| 103 | endif |
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| 104 | endif |
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| 105 | enddo |
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| 106 | enddo !fin boucle sur le downdraft |
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| 107 | |
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| 108 | ! Calcul des flux des traceurs dans les updraft et les downdrfat |
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| 109 | ! et du flux de masse compensateur |
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| 110 | ! en ilay=1 et nlay+1, fthu=0 et fthd=0 |
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| 111 | fthu(:, 1) = 0. |
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| 112 | fthu(:, nlay + 1) = 0. |
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| 113 | fthd(:, 1) = 0. |
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| 114 | fthd(:, nlay + 1) = 0. |
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| 115 | fc(:, 1) = 0. |
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| 116 | fc(:, nlay + 1) = 0. |
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| 117 | do ilay = 2, nlay, 1 !boucle sur les interfaces |
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| 118 | do ig = 1, ngrid |
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| 119 | fthu(ig, ilay) = fup(ig, ilay) * tracu(ig, ilay - 1) |
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| 120 | fthd(ig, ilay) = -fdn(ig, ilay) * tracd(ig, ilay) |
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| 121 | fc(ig, ilay) = fup(ig, ilay) - fdn(ig, ilay) |
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| 122 | enddo |
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| 123 | enddo |
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| 124 | |
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| 125 | |
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| 126 | !Boucle pour calculer le flux du traceur flux updraft, flux downdraft, flux compensatoire |
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| 127 | !Methode explicite : |
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| 128 | IF(iflag_impl==0) THEN |
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| 129 | do ilay = 2, nlay, 1 |
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| 130 | do ig = 1, ngrid |
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| 131 | !!!!ATTENTION HYPOTHESE de FLUX COMPENSATOIRE DESCENDANT ET DONC comme schema amont on va chercher trac au dessus!!!!! |
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| 132 | !!!! tentative de prise en compte d'un flux compensatoire montant !!!! |
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| 133 | IF (fup(ig, ilay) - fdn(ig, ilay) < 0.) THEN |
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| 134 | CALL abort_physic("thermcell_updown_dq", 'flux compensatoire '& |
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| 135 | // 'montant, cas non traite par thermcell_updown_dq', 1) |
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| 136 | !fthe(ig,ilay)=(fup(ig,ilay)-fdn(ig,ilay))*trac(ig,ilay-1) |
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| 137 | else |
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| 138 | fthe(ig, ilay) = -(fup(ig, ilay) - fdn(ig, ilay)) * trac(ig, ilay) |
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| 139 | endif |
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| 140 | !! si on voulait le prendre en compte on |
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| 141 | !fthe(ig,ilay)=-(fup(ig,ilay)-fdn(ig,ilay))*trac(ig,ilay-1) |
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| 142 | fthtot(ig, ilay) = fthu(ig, ilay) + fthd(ig, ilay) + fthe(ig, ilay) |
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| 143 | enddo |
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| 144 | enddo |
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| 145 | !Boucle pour calculer trac |
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| 146 | do ilay = 1, nlay |
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| 147 | do ig = 1, ngrid |
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| 148 | dtrac(ig, ilay) = (fthtot(ig, ilay) - fthtot(ig, ilay + 1)) / masse(ig, ilay) |
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| 149 | ! trac(ig,ilay)=trac(ig,ilay) + (fthtot(ig,ilay)-fthtot(ig,ilay+1))*(ptimestep/masse(ig,ilay)) |
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| 150 | enddo |
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| 151 | enddo !fin du calculer de la tendance du traceur avec la methode explicite |
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| 152 | |
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| 153 | !!! Reecriture du schéma explicite avec les notations du schéma implicite |
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| 154 | else IF(iflag_impl==-1) THEN |
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| 155 | WRITE(*, *) 'nouveau schéma explicite !!!' |
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| 156 | !!! Calcul de s1 |
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| 157 | do ilay = 1, nlay |
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| 158 | do ig = 1, ngrid |
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| 159 | s1(ig, ilay) = fthu(ig, ilay) - fthu(ig, ilay + 1) + fthd(ig, ilay) - fthd(ig, ilay + 1) |
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| 160 | s2(ig, ilay) = s1(ig, ilay) + fthe(ig, ilay) - fthe(ig, ilay + 1) |
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| 161 | enddo |
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| 162 | enddo |
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| 163 | |
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| 164 | do ilay = 2, nlay, 1 |
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| 165 | do ig = 1, ngrid |
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| 166 | IF (fup(ig, ilay) - fdn(ig, ilay) < 0.) THEN |
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| 167 | CALL abort_physic("thermcell_updown_dq", 'flux compensatoire ' & |
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| 168 | // 'montant, cas non traite par thermcell_updown_dq', 1) |
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| 169 | else |
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| 170 | fthe(ig, ilay) = -(fup(ig, ilay) - fdn(ig, ilay)) * trac(ig, ilay) |
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| 171 | endif |
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| 172 | fthtot(ig, ilay) = fthu(ig, ilay) + fthd(ig, ilay) + fthe(ig, ilay) |
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| 173 | enddo |
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| 174 | enddo |
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| 175 | !Boucle pour calculer trac |
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| 176 | do ilay = 1, nlay |
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| 177 | do ig = 1, ngrid |
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| 178 | ! dtrac(ig,ilay)=(fthtot(ig,ilay)-fthtot(ig,ilay+1))/masse(ig,ilay) |
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| 179 | dtrac(ig, ilay) = (s1(ig, ilay) + fthe(ig, ilay) - fthe(ig, ilay + 1)) / masse(ig, ilay) |
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| 180 | ! trac(ig,ilay)=trac(ig,ilay) + (fthtot(ig,ilay)-fthtot(ig,ilay+1))*(ptimestep/masse(ig,ilay)) |
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| 181 | ! trac(ig,ilay)=trac(ig,ilay) + (s1(ig,ilay)+fthe(ig,ilay)-fthe(ig,ilay+1))*(ptimestep/masse(ig,ilay)) |
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| 182 | enddo |
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| 183 | enddo !fin du calculer de la tendance du traceur avec la methode explicite |
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| 184 | |
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| 185 | ELSE IF (iflag_impl==1) THEN |
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| 186 | do ilay = 1, nlay |
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| 187 | do ig = 1, ngrid |
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| 188 | s1(ig, ilay) = fthu(ig, ilay) - fthu(ig, ilay + 1) + fthd(ig, ilay) - fthd(ig, ilay + 1) |
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| 189 | enddo |
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| 190 | enddo |
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| 191 | |
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| 192 | !Boucle pour calculer traci = trac((t+dt) |
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| 193 | do ilay = nlay - 1, 1, -1 |
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| 194 | do ig = 1, ngrid |
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| 195 | IF((fup(ig, ilay) - fdn(ig, ilay)) < 0) THEN |
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| 196 | WRITE(*, *) 'flux compensatoire montant, cas non traite par thermcell_updown_dq dans le cas d une resolution implicite, ilay : ', ilay |
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| 197 | CALL abort_physic("thermcell_updown_dq", "", 1) |
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| 198 | else |
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| 199 | mstar_inv = ptimestep / masse(ig, ilay) |
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| 200 | traci(ig, ilay) = ((traci(ig, ilay + 1) * fc(ig, ilay + 1) + s1(ig, ilay)) * mstar_inv + tracold(ig, ilay)) / (1. + fc(ig, ilay) * mstar_inv) |
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| 201 | endif |
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| 202 | enddo |
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| 203 | enddo |
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| 204 | do ilay = 1, nlay |
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| 205 | do ig = 1, ngrid |
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| 206 | dtrac(ig, ilay) = (traci(ig, ilay) - tracold(ig, ilay)) / ptimestep |
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| 207 | enddo |
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| 208 | enddo |
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| 209 | |
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| 210 | else |
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| 211 | CALL abort_physic("thermcell_updown_dq", & |
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| 212 | 'valeur de iflag_impl non prevue', 1) |
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| 213 | endif |
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| 214 | |
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| 215 | RETURN |
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| 216 | END |
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| 217 | |
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| 218 | !========================================================================= |
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| 219 | |
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| 220 | SUBROUTINE thermcell_down(ngrid, nlay, po, pt, pu, pv, pplay, pplev, & |
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| 221 | lmax, fup, eup, dup, theta) |
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| 222 | |
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| 223 | !-------------------------------------------------------------- |
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| 224 | !thermcell_down: calcul des propri??t??s du panache descendant. |
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| 225 | !-------------------------------------------------------------- |
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| 226 | |
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| 227 | USE lmdz_thermcell_ini, ONLY: prt_level, RLvCp, RKAPPA, RETV, fact_thermals_down |
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| 228 | IMPLICIT NONE |
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| 229 | |
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| 230 | ! arguments |
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| 231 | |
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| 232 | INTEGER, INTENT(IN) :: ngrid, nlay |
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| 233 | REAL, INTENT(IN), DIMENSION(ngrid, nlay) :: po, pt, pu, pv, pplay, eup, dup |
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| 234 | REAL, INTENT(IN), DIMENSION(ngrid, nlay) :: theta |
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| 235 | REAL, INTENT(IN), DIMENSION(ngrid, nlay + 1) :: pplev, fup |
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| 236 | INTEGER, INTENT(IN), DIMENSION(ngrid) :: lmax |
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| 237 | |
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| 238 | |
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| 239 | |
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| 240 | ! Local |
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| 241 | |
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| 242 | REAL, DIMENSION(ngrid, nlay) :: edn, ddn, thetad |
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| 243 | REAL, DIMENSION(ngrid, nlay + 1) :: fdn |
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| 244 | |
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| 245 | INTEGER ig, ilay |
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| 246 | REAL dqsat_dT |
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| 247 | LOGICAL mask(ngrid, nlay) |
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| 248 | |
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| 249 | edn(:, :) = 0. |
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| 250 | ddn(:, :) = 0. |
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| 251 | fdn(:, :) = 0. |
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| 252 | thetad(:, :) = 0. |
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| 253 | |
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| 254 | ! lmax : indice tel que fu(kmax+1)=0 |
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| 255 | |
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| 256 | ! Dans ce cas, pas besoin d'initialiser thetad(lmax) ( =theta(lmax) ) |
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| 257 | |
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| 258 | ! FH MODIFS APRES REUNIONS POUR COMMISSIONS |
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| 259 | ! quelques erreurs de declaration |
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| 260 | ! probleme si lmax=1 ce qui a l'air d'??tre le cas en d??but de simu. Devrait ??tre 0 ? |
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| 261 | ! Remarques : |
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| 262 | ! on pourrait ??crire la formule de thetad |
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| 263 | ! www=fdn(ig,ilay+1)/ (fdn(ig,ilay)+ddn(ig,ilay)) |
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| 264 | ! thetad(ig,ilay)= www * thetad(ig,ilay+1) + (1.-www) * theta(ig,ilay) |
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| 265 | ! Elle a l'avantage de bien montr?? la conservation, l'id??e fondamentale dans le |
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| 266 | ! transport qu'on ne fait que sommer des "sources" au travers d'un "propagateur" |
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| 267 | ! (Green) |
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| 268 | ! Elle montre aussi beaucoup plus clairement pourquoi on n'a pas ?? se souccier (trop) |
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| 269 | ! de la possible nulit?? du d??nominateur |
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| 270 | |
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| 271 | do ilay = nlay, 1, -1 |
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| 272 | do ig = 1, ngrid |
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| 273 | IF (ilay<=lmax(ig).AND.lmax(ig)>1) THEN |
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| 274 | edn(ig, ilay) = fact_thermals_down * dup(ig, ilay) |
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| 275 | ddn(ig, ilay) = fact_thermals_down * eup(ig, ilay) |
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| 276 | fdn(ig, ilay) = fdn(ig, ilay + 1) + edn(ig, ilay) - ddn(ig, ilay) |
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| 277 | thetad(ig, ilay) = (fdn(ig, ilay + 1) * thetad(ig, ilay + 1) + edn(ig, ilay) * theta(ig, ilay)) / (fdn(ig, ilay) + ddn(ig, ilay)) |
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| 278 | endif |
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| 279 | enddo |
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| 280 | enddo |
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| 281 | |
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| 282 | ! Suite du travail : |
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| 283 | ! Ecrire la conservervation de theta_l dans le panache descendant |
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| 284 | ! Eventuellement faire la transformation theta_l -> theta_v |
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| 285 | ! Si l'air est sec (et qu'on oublie le c??t?? theta_v) on peut |
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| 286 | ! se contenter de conserver theta. |
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| 287 | |
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| 288 | ! Connaissant thetadn, on peut calculer la flotabilit??. |
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| 289 | ! Connaissant la flotabilit??, on peut calculer w de proche en proche |
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| 290 | ! On peut calculer le detrainement de facon ?? garder alpha*rho = cste |
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| 291 | ! On en d??duit l'entrainement lat??ral |
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| 292 | ! C'est le mod??le des mini-projets. |
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| 293 | |
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| 294 | !^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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| 295 | ! Initialisations : |
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| 296 | !------------------ |
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| 297 | |
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| 298 | RETURN |
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| 299 | END |
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| 300 | END MODULE lmdz_thermcell_down |
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