| 1 | subroutine largescale(dtime, paprs, pplay, t, pq, |
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| 2 | & pdt, d_t, d_q, d_ql, rneb, reffH2O) |
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| 3 | |
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| 4 | use watercommon_h, only : RLVTT, RCPD, RVTMP2 |
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| 5 | |
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| 6 | IMPLICIT none |
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| 7 | |
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| 8 | !================================================================== |
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| 9 | ! |
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| 10 | ! Purpose |
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| 11 | ! ------- |
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| 12 | ! Calculates large-scale (stratiform) H2O condensation. |
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| 13 | ! |
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| 14 | ! Authors |
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| 15 | ! ------- |
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| 16 | ! Adapted from the LMDTERRE code by R. Wordsworth (2009) |
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| 17 | ! Original author Z. X. Li (1993) |
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| 18 | ! |
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| 19 | !================================================================== |
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| 20 | |
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| 21 | #include "dimensions.h" |
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| 22 | #include "dimphys.h" |
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| 23 | #include "comcstfi.h" |
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| 24 | |
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| 25 | #include "fisice.h" |
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| 26 | #include "callkeys.h" |
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| 27 | #include "tracer.h" |
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| 28 | |
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| 29 | |
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| 30 | ! Pre-arguments (for universal model) |
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| 31 | real pq(ngridmx,nlayermx,nqmx) ! tracer (kg/kg) |
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| 32 | |
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| 33 | ! Arguments |
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| 34 | REAL dtime ! intervalle du temps (s) |
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| 35 | REAL paprs(ngridmx,nlayermx+1) ! pression a inter-couche |
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| 36 | REAL pplay(ngridmx,nlayermx) ! pression au milieu de couche |
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| 37 | REAL t(ngridmx,nlayermx) ! temperature (K) |
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| 38 | REAL q(ngridmx,nlayermx) ! humidite specifique (kg/kg) |
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| 39 | REAL d_t(ngridmx,nlayermx) ! incrementation de la temperature (K) |
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| 40 | REAL d_q(ngridmx,nlayermx) ! incrementation de la vapeur d'eau |
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| 41 | REAL d_ql(ngridmx,nlayermx) ! incrementation de l'eau liquide |
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| 42 | REAL rneb(ngridmx,nlayermx) ! fraction nuageuse |
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| 43 | REAL reffH2O(ngridmx,nlayermx) ! cloud particle mean radius (m) |
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| 44 | |
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| 45 | REAL pdt(ngridmx,nlayermx) ! added by Benjamin! |
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| 46 | |
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| 47 | ! Options du programme |
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| 48 | REAL ratqs ! determine largeur de la distribution de vapeur |
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| 49 | PARAMETER (ratqs=0.2) |
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| 50 | |
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| 51 | ! Variables locales |
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| 52 | REAL CBRT |
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| 53 | EXTERNAL CBRT |
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| 54 | INTEGER i, k |
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| 55 | REAL zt(ngridmx), zq(ngridmx) |
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| 56 | REAL zcond(ngridmx) |
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| 57 | REAL zdelq(ngridmx) |
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| 58 | REAL zqs(ngridmx), zdqs(ngridmx) |
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| 59 | |
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| 60 | REAL zcor(ngridmx), zdelta(ngridmx), zcvm5(ngridmx) |
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| 61 | REAL zx_q(ngridmx) |
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| 62 | |
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| 63 | ! GCM -----> subroutine variables, initialisation of outputs |
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| 64 | DO k = 1, nlayermx |
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| 65 | DO i = 1, ngridmx |
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| 66 | q(i,k) = pq(i,k,igcm_h2o_vap) |
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| 67 | d_t(i,k) = 0.0 |
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| 68 | d_q(i,k) = 0.0 |
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| 69 | d_ql(i,k) = 0.0 |
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| 70 | rneb(i,k) = 0.0 |
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| 71 | ENDDO |
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| 72 | ENDDO |
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| 73 | |
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| 74 | ! Boucle verticale (du haut vers le bas) |
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| 75 | DO 9999 k = nlayermx, 1, -1 |
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| 76 | |
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| 77 | DO i = 1, ngridmx |
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| 78 | zt(i)=t(i,k)+pdt(i,k)*dtime |
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| 79 | zq(i)=q(i,k) ! no need to add tendency as we're already dealing with qevap |
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| 80 | ENDDO |
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| 81 | |
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| 82 | ! Calculer la vapeur d'eau saturante et |
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| 83 | ! determiner la condensation partielle |
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| 84 | DO i = 1, ngridmx |
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| 85 | |
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| 86 | call watersat(zt(i),pplay(i,k),zqs(i)) |
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| 87 | call watersat_grad(zt(i),zqs(i),zdqs(i)) |
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| 88 | |
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| 89 | !IF (zt(i).LT.t_coup) THEN |
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| 90 | ! zqs(i) = qsats(zt(i))/pplay(i,k) |
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| 91 | ! zdqs(i) = dqsats(zt(i),zqs(i)) |
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| 92 | !ELSE |
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| 93 | ! zqs(i) = qsatl(zt(i))/pplay(i,k) |
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| 94 | ! zdqs(i) = dqsatl(zt(i),zqs(i)) |
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| 95 | !ENDIF |
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| 96 | |
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| 97 | zdelq(i) = ratqs * zq(i) |
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| 98 | rneb(i,k) = (zq(i)+zdelq(i)-zqs(i)) / (2.0*zdelq(i)) |
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| 99 | zcond(i) = 0.0 |
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| 100 | zx_q(i) = (zq(i)+zdelq(i)+zqs(i))/2.0 |
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| 101 | if (rneb(i,k) .LE. 0.0) zx_q(i) = 0.0 |
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| 102 | if (rneb(i,k) .GE. 1.0) zx_q(i) = zq(i) |
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| 103 | rneb(i,k) = MAX(0.0,MIN(1.0,rneb(i,k))) |
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| 104 | !zcond(i) = MAX(0.0,(zx_q(i)-zqs(i)*rneb(i,k)/(1.+zdqs(i)))) |
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| 105 | zcond(i) = MAX(0.0,(zx_q(i)-zqs(i))*rneb(i,k)/(1.+zdqs(i))) |
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| 106 | ! zcond always postive! cannot evaporate clouds! |
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| 107 | ! this is why we must reevaporate before largescale |
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| 108 | |
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| 109 | |
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| 110 | zcond(i) = zcond(i)/dtime ! added by RDW |
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| 111 | |
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| 112 | ! for varying particle size in rad tran and (possibly) sedimentation |
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| 113 | if(.not.aerofixed)then |
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| 114 | reffH2O(i,k) = CBRT( 3*zcond(i)/( 4*Nmix_h2o*pi*rho_ice)) |
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| 115 | reffH2O(i,k) = max(reffH2O(i,k),1.e-8) |
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| 116 | endif |
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| 117 | |
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| 118 | ENDDO |
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| 119 | |
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| 120 | ! Tendances de t et q |
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| 121 | DO i = 1, ngridmx |
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| 122 | d_q(i,k) = - zcond(i) |
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| 123 | d_ql(i,k) = zcond(i) |
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| 124 | !d_t(i,k) = zcond(i)*RLVTT/cpp |
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| 125 | d_t(i,k) = zcond(i)*RLVTT/RCPD!/(1.0+RVTMP2*q(i,k)) |
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| 126 | ! this one is FAR TOO BIG |
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| 127 | ENDDO |
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| 128 | |
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| 129 | 9999 CONTINUE |
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| 130 | |
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| 131 | !print*,'qsat=',zqs |
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| 132 | !print*,'q=',q |
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| 133 | !print*,'dq=',d_q*dtime |
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| 134 | !print*,'dT in LS=',d_t*dtime |
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| 135 | |
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| 136 | !print*,'rice=',rice |
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| 137 | !print*,'rneb=',rneb |
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| 138 | |
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| 139 | return |
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| 140 | end |
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