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! $Header: /home/cvsroot/LMDZ4/libf/phylmd/fisrtilp.F,v 1.2 2004/11/09 16:55:40 lmdzadmin Exp $ |
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SUBROUTINE fisrtilp(dtime,paprs,pplay,t,q,ptconv,ratqs, |
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s d_t, d_q, d_ql, rneb, radliq, rain, snow, |
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s pfrac_impa, pfrac_nucl, pfrac_1nucl, |
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s frac_impa, frac_nucl, |
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s prfl, psfl, rhcl) |
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c |
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use dimens_m |
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use dimphy |
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use tracstoke |
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use YOMCST |
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use yoethf |
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use fcttre |
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use comfisrtilp |
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IMPLICIT none |
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c====================================================================== |
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c Auteur(s): Z.X. Li (LMD/CNRS) |
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c Date: le 20 mars 1995 |
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c Objet: condensation et precipitation stratiforme. |
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c schema de nuage |
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c====================================================================== |
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c====================================================================== |
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c |
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c Arguments: |
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c |
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REAL dtime ! intervalle du temps (s) |
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REAL, intent(in):: paprs(klon,klev+1) ! pression a inter-couche |
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REAL pplay(klon,klev) ! pression au milieu de couche |
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REAL t(klon,klev) ! temperature (K) |
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REAL q(klon,klev) ! humidite specifique (kg/kg) |
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REAL d_t(klon,klev) ! incrementation de la temperature (K) |
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REAL d_q(klon,klev) ! incrementation de la vapeur d'eau |
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REAL d_ql(klon,klev) ! incrementation de l'eau liquide |
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REAL rneb(klon,klev) ! fraction nuageuse |
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REAL radliq(klon,klev) ! eau liquide utilisee dans rayonnements |
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REAL rhcl(klon,klev) ! humidite relative en ciel clair |
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REAL rain(klon) ! pluies (mm/s) |
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REAL snow(klon) ! neige (mm/s) |
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REAL prfl(klon,klev+1) ! flux d'eau precipitante aux interfaces (kg/m2/s) |
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REAL psfl(klon,klev+1) ! flux d'eau precipitante aux interfaces (kg/m2/s) |
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cAA |
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c Coeffients de fraction lessivee : pour OFF-LINE |
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c |
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REAL pfrac_nucl(klon,klev) |
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REAL pfrac_1nucl(klon,klev) |
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REAL pfrac_impa(klon,klev) |
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c |
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c Fraction d'aerosols lessivee par impaction et par nucleation |
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c POur ON-LINE |
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c |
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REAL frac_impa(klon,klev) |
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REAL frac_nucl(klon,klev) |
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real zct(klon),zcl(klon) |
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cAA |
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c |
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c Options du programme: |
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c |
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REAL seuil_neb ! un nuage existe vraiment au-dela |
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PARAMETER (seuil_neb=0.001) |
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INTEGER ninter ! sous-intervals pour la precipitation |
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PARAMETER (ninter=5) |
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LOGICAL evap_prec ! evaporation de la pluie |
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PARAMETER (evap_prec=.TRUE.) |
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REAL ratqs(klon,klev) ! determine la largeur de distribution de vapeur |
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logical ptconv(klon,klev) ! determine la largeur de distribution de vapeur |
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real zpdf_sig(klon),zpdf_k(klon),zpdf_delta(klon) |
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real Zpdf_a(klon),zpdf_b(klon),zpdf_e1(klon),zpdf_e2(klon) |
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real erf |
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c |
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LOGICAL cpartiel ! condensation partielle |
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PARAMETER (cpartiel=.TRUE.) |
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REAL t_coup |
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PARAMETER (t_coup=234.0) |
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c |
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c Variables locales: |
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c |
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INTEGER i, k, n, kk |
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REAL zqs(klon), zdqs(klon), zdelta, zcor, zcvm5 |
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REAL zrfl(klon), zrfln(klon), zqev, zqevt |
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REAL zoliq(klon), zcond(klon), zq(klon), zqn(klon), zdelq |
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REAL ztglace, zt(klon) |
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INTEGER nexpo ! exponentiel pour glace/eau |
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REAL zdz(klon),zrho(klon),ztot(klon), zrhol(klon) |
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REAL zchau(klon),zfroi(klon),zfice(klon),zneb(klon) |
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c |
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LOGICAL appel1er |
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SAVE appel1er |
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c |
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c--------------------------------------------------------------- |
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c |
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cAA Variables traceurs: |
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cAA Provisoire !!! Parametres alpha du lessivage |
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cAA A priori on a 4 scavenging # possibles |
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c |
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REAL a_tr_sca(4) |
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save a_tr_sca |
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c |
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c Variables intermediaires |
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c |
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REAL zalpha_tr |
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REAL zfrac_lessi |
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REAL zprec_cond(klon) |
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cAA |
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REAL zmair, zcpair, zcpeau |
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C Pour la conversion eau-neige |
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REAL zlh_solid(klon), zm_solid |
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cIM |
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INTEGER klevm1 |
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c--------------------------------------------------------------- |
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c |
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c Fonctions en ligne: |
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c |
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REAL fallvs,fallvc ! vitesse de chute pour crystaux de glace |
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REAL zzz |
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fallvc (zzz) = 3.29/2.0 * ((zzz)**0.16) * ffallv_con |
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fallvs (zzz) = 3.29/2.0 * ((zzz)**0.16) * ffallv_lsc |
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c |
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DATA appel1er /.TRUE./ |
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cym |
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zdelq=0.0 |
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IF (appel1er) THEN |
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c |
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PRINT*, 'fisrtilp, ninter:', ninter |
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PRINT*, 'fisrtilp, evap_prec:', evap_prec |
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PRINT*, 'fisrtilp, cpartiel:', cpartiel |
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IF (ABS(dtime/FLOAT(ninter)-360.0).GT.0.001) THEN |
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PRINT*, 'fisrtilp: Ce n est pas prevu, voir Z.X.Li', dtime |
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PRINT*, 'Je prefere un sous-intervalle de 6 minutes' |
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c stop 1 |
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ENDIF |
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appel1er = .FALSE. |
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c |
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cAA initialiation provisoire |
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a_tr_sca(1) = -0.5 |
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a_tr_sca(2) = -0.5 |
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a_tr_sca(3) = -0.5 |
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a_tr_sca(4) = -0.5 |
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c |
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cAA Initialisation a 1 des coefs des fractions lessivees |
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c |
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DO k = 1, klev |
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DO i = 1, klon |
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pfrac_nucl(i,k)=1. |
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pfrac_1nucl(i,k)=1. |
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pfrac_impa(i,k)=1. |
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ENDDO |
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ENDDO |
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ENDIF ! test sur appel1er |
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c |
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cMAf Initialisation a 0 de zoliq |
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DO i = 1, klon |
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zoliq(i)=0. |
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ENDDO |
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c Determiner les nuages froids par leur temperature |
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c nexpo regle la raideur de la transition eau liquide / eau glace. |
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c |
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ztglace = RTT - 15.0 |
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nexpo = 6 |
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ccc nexpo = 1 |
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c |
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c Initialiser les sorties: |
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c |
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DO k = 1, klev+1 |
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DO i = 1, klon |
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prfl(i,k) = 0.0 |
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psfl(i,k) = 0.0 |
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ENDDO |
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ENDDO |
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DO k = 1, klev |
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DO i = 1, klon |
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d_t(i,k) = 0.0 |
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d_q(i,k) = 0.0 |
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d_ql(i,k) = 0.0 |
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rneb(i,k) = 0.0 |
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radliq(i,k) = 0.0 |
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frac_nucl(i,k) = 1. |
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frac_impa(i,k) = 1. |
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ENDDO |
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ENDDO |
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DO i = 1, klon |
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rain(i) = 0.0 |
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snow(i) = 0.0 |
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ENDDO |
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c |
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c Initialiser le flux de precipitation a zero |
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c |
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DO i = 1, klon |
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zrfl(i) = 0.0 |
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zneb(i) = seuil_neb |
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ENDDO |
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c |
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c |
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cAA Pour plus de securite |
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zalpha_tr = 0. |
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zfrac_lessi = 0. |
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cAA---------------------------------------------------------- |
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c |
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c Boucle verticale (du haut vers le bas) |
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c |
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cIM : klevm1 |
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klevm1=klev-1 |
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DO 9999 k = klev, 1, -1 |
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c |
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cAA---------------------------------------------------------- |
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c |
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DO i = 1, klon |
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zt(i)=t(i,k) |
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zq(i)=q(i,k) |
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ENDDO |
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c |
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c Calculer la varition de temp. de l'air du a la chaleur sensible |
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C transporter par la pluie. |
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C Il resterait a rajouter cet effet de la chaleur sensible sur les |
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C flux de surface, du a la diff. de temp. entre le 1er niveau et la |
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C surface. |
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C |
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DO i = 1, klon |
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cIM |
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IF(k.LE.klevm1) THEN |
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zmair=(paprs(i,k)-paprs(i,k+1))/RG |
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zcpair=RCPD*(1.0+RVTMP2*zq(i)) |
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zcpeau=RCPD*RVTMP2 |
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zt(i) = ( (t(i,k+1)+d_t(i,k+1))*zrfl(i)*dtime*zcpeau |
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$ + zmair*zcpair*zt(i) ) |
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$ / (zmair*zcpair + zrfl(i)*dtime*zcpeau) |
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CC WRITE (6,*) 'cppluie ', zt(i)-(t(i,k+1)+d_t(i,k+1)) |
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ENDIF |
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ENDDO |
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c |
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c |
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c Calculer l'evaporation de la precipitation |
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c |
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IF (evap_prec) THEN |
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DO i = 1, klon |
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IF (zrfl(i) .GT.0.) THEN |
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IF (thermcep) THEN |
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zdelta=MAX(0.,SIGN(1.,RTT-zt(i))) |
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zqs(i)= R2ES*FOEEW(zt(i),zdelta)/pplay(i,k) |
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zqs(i)=MIN(0.5,zqs(i)) |
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zcor=1./(1.-RETV*zqs(i)) |
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zqs(i)=zqs(i)*zcor |
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ELSE |
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IF (zt(i) .LT. t_coup) THEN |
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zqs(i) = qsats(zt(i)) / pplay(i,k) |
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ELSE |
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zqs(i) = qsatl(zt(i)) / pplay(i,k) |
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ENDIF |
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ENDIF |
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zqev = MAX (0.0, (zqs(i)-zq(i))*zneb(i) ) |
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zqevt = coef_eva * (1.0-zq(i)/zqs(i)) * SQRT(zrfl(i)) |
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. * (paprs(i,k)-paprs(i,k+1))/pplay(i,k)*zt(i)*RD/RG |
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zqevt = MAX(0.0,MIN(zqevt,zrfl(i))) |
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. * RG*dtime/(paprs(i,k)-paprs(i,k+1)) |
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zqev = MIN (zqev, zqevt) |
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zrfln(i) = zrfl(i) - zqev*(paprs(i,k)-paprs(i,k+1)) |
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. /RG/dtime |
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c pour la glace, on réévapore toute la précip dans la couche du dessous |
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c la glace venant de la couche du dessus est simplement dans la couche |
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c du dessous. |
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IF (zt(i) .LT. t_coup.and.reevap_ice) zrfln(i)=0. |
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zq(i) = zq(i) - (zrfln(i)-zrfl(i)) |
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. * (RG/(paprs(i,k)-paprs(i,k+1)))*dtime |
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zt(i) = zt(i) + (zrfln(i)-zrfl(i)) |
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. * (RG/(paprs(i,k)-paprs(i,k+1)))*dtime |
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. * RLVTT/RCPD/(1.0+RVTMP2*zq(i)) |
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zrfl(i) = zrfln(i) |
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ENDIF |
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ENDDO |
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ENDIF |
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c |
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c Calculer Qs et L/Cp*dQs/dT: |
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c |
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IF (thermcep) THEN |
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DO i = 1, klon |
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zdelta = MAX(0.,SIGN(1.,RTT-zt(i))) |
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zcvm5 = R5LES*RLVTT*(1.-zdelta) + R5IES*RLSTT*zdelta |
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zcvm5 = zcvm5 /RCPD/(1.0+RVTMP2*zq(i)) |
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zqs(i) = R2ES*FOEEW(zt(i),zdelta)/pplay(i,k) |
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zqs(i) = MIN(0.5,zqs(i)) |
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zcor = 1./(1.-RETV*zqs(i)) |
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zqs(i) = zqs(i)*zcor |
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zdqs(i) = FOEDE(zt(i),zdelta,zcvm5,zqs(i),zcor) |
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ENDDO |
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ELSE |
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DO i = 1, klon |
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IF (zt(i).LT.t_coup) THEN |
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zqs(i) = qsats(zt(i))/pplay(i,k) |
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zdqs(i) = dqsats(zt(i),zqs(i)) |
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ELSE |
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zqs(i) = qsatl(zt(i))/pplay(i,k) |
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zdqs(i) = dqsatl(zt(i),zqs(i)) |
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ENDIF |
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ENDDO |
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ENDIF |
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c |
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c Determiner la condensation partielle et calculer la quantite |
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c de l'eau condensee: |
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c |
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IF (cpartiel) THEN |
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c print*,'Dans partiel k=',k |
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c |
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c Calcul de l'eau condensee et de la fraction nuageuse et de l'eau |
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c nuageuse a partir des PDF de Sandrine Bony. |
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c rneb : fraction nuageuse |
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c zqn : eau totale dans le nuage |
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c zcond : eau condensee moyenne dans la maille. |
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c on prend en compte le réchauffement qui diminue la partie condensee |
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c |
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c Version avec les raqts |
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if (iflag_pdf.eq.0) then |
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do i=1,klon |
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zdelq = min(ratqs(i,k),0.99) * zq(i) |
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rneb(i,k) = (zq(i)+zdelq-zqs(i)) / (2.0*zdelq) |
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zqn(i) = (zq(i)+zdelq+zqs(i))/2.0 |
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enddo |
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else |
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c |
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c Version avec les nouvelles PDFs. |
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do i=1,klon |
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if(zq(i).lt.1.e-15) then |
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CC Lionel GUEZ print*,'ZQ(',i,',',k,')=',zq(i) |
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zq(i)=1.e-15 |
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endif |
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enddo |
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do i=1,klon |
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zpdf_sig(i)=ratqs(i,k)*zq(i) |
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zpdf_k(i)=-sqrt(log(1.+(zpdf_sig(i)/zq(i))**2)) |
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zpdf_delta(i)=log(zq(i)/zqs(i)) |
349 |
|
|
zpdf_a(i)=zpdf_delta(i)/(zpdf_k(i)*sqrt(2.)) |
350 |
|
|
zpdf_b(i)=zpdf_k(i)/(2.*sqrt(2.)) |
351 |
|
|
zpdf_e1(i)=zpdf_a(i)-zpdf_b(i) |
352 |
|
|
zpdf_e1(i)=sign(min(abs(zpdf_e1(i)),5.),zpdf_e1(i)) |
353 |
|
|
zpdf_e1(i)=1.-erf(zpdf_e1(i)) |
354 |
|
|
zpdf_e2(i)=zpdf_a(i)+zpdf_b(i) |
355 |
|
|
zpdf_e2(i)=sign(min(abs(zpdf_e2(i)),5.),zpdf_e2(i)) |
356 |
|
|
zpdf_e2(i)=1.-erf(zpdf_e2(i)) |
357 |
|
|
if (zpdf_e1(i).lt.1.e-10) then |
358 |
|
|
rneb(i,k)=0. |
359 |
|
|
zqn(i)=zqs(i) |
360 |
|
|
else |
361 |
|
|
rneb(i,k)=0.5*zpdf_e1(i) |
362 |
|
|
zqn(i)=zq(i)*zpdf_e2(i)/zpdf_e1(i) |
363 |
|
|
endif |
364 |
|
|
|
365 |
|
|
enddo |
366 |
|
|
|
367 |
|
|
endif ! iflag_pdf |
368 |
|
|
|
369 |
|
|
do i=1,klon |
370 |
|
|
IF (rneb(i,k) .LE. 0.0) zqn(i) = 0.0 |
371 |
|
|
IF (rneb(i,k) .GE. 1.0) zqn(i) = zq(i) |
372 |
|
|
rneb(i,k) = MAX(0.0,MIN(1.0,rneb(i,k))) |
373 |
|
|
c zcond(i) = MAX(0.0,zqn(i)-zqs(i))*rneb(i,k)/(1.+zdqs(i)) |
374 |
|
|
c On ne divise pas par 1+zdqs pour forcer a avoir l'eau predite par |
375 |
|
|
c la convection. |
376 |
|
|
c ATTENTION !!! Il va falloir verifier tout ca. |
377 |
|
|
zcond(i) = MAX(0.0,zqn(i)-zqs(i))*rneb(i,k) |
378 |
|
|
c print*,'ZDQS ',zdqs(i) |
379 |
|
|
c--Olivier |
380 |
|
|
rhcl(i,k)=(zqs(i)+zq(i)-zdelq)/2./zqs(i) |
381 |
|
|
IF (rneb(i,k) .LE. 0.0) rhcl(i,k)=zq(i)/zqs(i) |
382 |
|
|
IF (rneb(i,k) .GE. 1.0) rhcl(i,k)=1.0 |
383 |
|
|
c--fin |
384 |
|
|
ENDDO |
385 |
|
|
ELSE |
386 |
|
|
DO i = 1, klon |
387 |
|
|
IF (zq(i).GT.zqs(i)) THEN |
388 |
|
|
rneb(i,k) = 1.0 |
389 |
|
|
ELSE |
390 |
|
|
rneb(i,k) = 0.0 |
391 |
|
|
ENDIF |
392 |
|
|
zcond(i) = MAX(0.0,zq(i)-zqs(i))/(1.+zdqs(i)) |
393 |
|
|
ENDDO |
394 |
|
|
ENDIF |
395 |
|
|
c |
396 |
|
|
DO i = 1, klon |
397 |
|
|
zq(i) = zq(i) - zcond(i) |
398 |
|
|
c zt(i) = zt(i) + zcond(i) * RLVTT/RCPD |
399 |
|
|
zt(i) = zt(i) + zcond(i) * RLVTT/RCPD/(1.0+RVTMP2*zq(i)) |
400 |
|
|
ENDDO |
401 |
|
|
c |
402 |
|
|
c Partager l'eau condensee en precipitation et eau liquide nuageuse |
403 |
|
|
c |
404 |
|
|
DO i = 1, klon |
405 |
|
|
IF (rneb(i,k).GT.0.0) THEN |
406 |
|
|
zoliq(i) = zcond(i) |
407 |
|
|
zrho(i) = pplay(i,k) / zt(i) / RD |
408 |
|
|
zdz(i) = (paprs(i,k)-paprs(i,k+1)) / (zrho(i)*RG) |
409 |
|
|
zfice(i) = 1.0 - (zt(i)-ztglace) / (273.13-ztglace) |
410 |
|
|
zfice(i) = MIN(MAX(zfice(i),0.0),1.0) |
411 |
|
|
zfice(i) = zfice(i)**nexpo |
412 |
|
|
zneb(i) = MAX(rneb(i,k), seuil_neb) |
413 |
|
|
radliq(i,k) = zoliq(i)/FLOAT(ninter+1) |
414 |
|
|
ENDIF |
415 |
|
|
ENDDO |
416 |
|
|
c |
417 |
|
|
DO n = 1, ninter |
418 |
|
|
DO i = 1, klon |
419 |
|
|
IF (rneb(i,k).GT.0.0) THEN |
420 |
|
|
zrhol(i) = zrho(i) * zoliq(i) / zneb(i) |
421 |
|
|
|
422 |
|
|
if (ptconv(i,k)) then |
423 |
|
|
zcl(i)=cld_lc_con |
424 |
|
|
zct(i)=1./cld_tau_con |
425 |
|
|
else |
426 |
|
|
zcl(i)=cld_lc_lsc |
427 |
|
|
zct(i)=1./cld_tau_lsc |
428 |
|
|
endif |
429 |
|
|
c quantité d'eau à élminier. |
430 |
|
|
zchau(i) = zct(i)*dtime/FLOAT(ninter) * zoliq(i) |
431 |
|
|
. *(1.0-EXP(-(zoliq(i)/zneb(i)/zcl(i))**2)) *(1.-zfice(i)) |
432 |
|
|
c meme chose pour la glace. |
433 |
|
|
if (ptconv(i,k)) then |
434 |
|
|
zfroi(i) = dtime/FLOAT(ninter)/zdz(i)*zoliq(i) |
435 |
|
|
. *fallvc(zrhol(i)) * zfice(i) |
436 |
|
|
else |
437 |
|
|
zfroi(i) = dtime/FLOAT(ninter)/zdz(i)*zoliq(i) |
438 |
|
|
. *fallvs(zrhol(i)) * zfice(i) |
439 |
|
|
endif |
440 |
|
|
ztot(i) = zchau(i) + zfroi(i) |
441 |
|
|
IF (zneb(i).EQ.seuil_neb) ztot(i) = 0.0 |
442 |
|
|
ztot(i) = MIN(MAX(ztot(i),0.0),zoliq(i)) |
443 |
|
|
zoliq(i) = MAX(zoliq(i)-ztot(i), 0.0) |
444 |
|
|
radliq(i,k) = radliq(i,k) + zoliq(i)/FLOAT(ninter+1) |
445 |
|
|
ENDIF |
446 |
|
|
ENDDO |
447 |
|
|
ENDDO |
448 |
|
|
c |
449 |
|
|
DO i = 1, klon |
450 |
|
|
IF (rneb(i,k).GT.0.0) THEN |
451 |
|
|
d_ql(i,k) = zoliq(i) |
452 |
|
|
zrfl(i) = zrfl(i)+ MAX(zcond(i)-zoliq(i),0.0) |
453 |
|
|
. * (paprs(i,k)-paprs(i,k+1))/(RG*dtime) |
454 |
|
|
ENDIF |
455 |
|
|
IF (zt(i).LT.RTT) THEN |
456 |
|
|
psfl(i,k)=zrfl(i) |
457 |
|
|
ELSE |
458 |
|
|
prfl(i,k)=zrfl(i) |
459 |
|
|
ENDIF |
460 |
|
|
ENDDO |
461 |
|
|
c |
462 |
|
|
c Calculer les tendances de q et de t: |
463 |
|
|
c |
464 |
|
|
DO i = 1, klon |
465 |
|
|
d_q(i,k) = zq(i) - q(i,k) |
466 |
|
|
d_t(i,k) = zt(i) - t(i,k) |
467 |
|
|
ENDDO |
468 |
|
|
c |
469 |
|
|
cAA--------------- Calcul du lessivage stratiforme ------------- |
470 |
|
|
|
471 |
|
|
DO i = 1,klon |
472 |
|
|
c |
473 |
|
|
zprec_cond(i) = MAX(zcond(i)-zoliq(i),0.0) |
474 |
|
|
. * (paprs(i,k)-paprs(i,k+1))/RG |
475 |
|
|
IF (rneb(i,k).GT.0.0.and.zprec_cond(i).gt.0.) THEN |
476 |
|
|
cAA lessivage nucleation LMD5 dans la couche elle-meme |
477 |
|
|
if (t(i,k) .GE. ztglace) THEN |
478 |
|
|
zalpha_tr = a_tr_sca(3) |
479 |
|
|
else |
480 |
|
|
zalpha_tr = a_tr_sca(4) |
481 |
|
|
endif |
482 |
|
|
zfrac_lessi = 1. - EXP(zalpha_tr*zprec_cond(i)/zneb(i)) |
483 |
|
|
pfrac_nucl(i,k)=pfrac_nucl(i,k)*(1.-zneb(i)*zfrac_lessi) |
484 |
|
|
frac_nucl(i,k)= 1.-zneb(i)*zfrac_lessi |
485 |
|
|
c |
486 |
|
|
c nucleation avec un facteur -1 au lieu de -0.5 |
487 |
|
|
zfrac_lessi = 1. - EXP(-zprec_cond(i)/zneb(i)) |
488 |
|
|
pfrac_1nucl(i,k)=pfrac_1nucl(i,k)*(1.-zneb(i)*zfrac_lessi) |
489 |
|
|
ENDIF |
490 |
|
|
c |
491 |
|
|
ENDDO ! boucle sur i |
492 |
|
|
c |
493 |
|
|
cAA Lessivage par impaction dans les couches en-dessous |
494 |
|
|
DO kk = k-1, 1, -1 |
495 |
|
|
DO i = 1, klon |
496 |
|
|
IF (rneb(i,k).GT.0.0.and.zprec_cond(i).gt.0.) THEN |
497 |
|
|
if (t(i,kk) .GE. ztglace) THEN |
498 |
|
|
zalpha_tr = a_tr_sca(1) |
499 |
|
|
else |
500 |
|
|
zalpha_tr = a_tr_sca(2) |
501 |
|
|
endif |
502 |
|
|
zfrac_lessi = 1. - EXP(zalpha_tr*zprec_cond(i)/zneb(i)) |
503 |
|
|
pfrac_impa(i,kk)=pfrac_impa(i,kk)*(1.-zneb(i)*zfrac_lessi) |
504 |
|
|
frac_impa(i,kk)= 1.-zneb(i)*zfrac_lessi |
505 |
|
|
ENDIF |
506 |
|
|
ENDDO |
507 |
|
|
ENDDO |
508 |
|
|
c |
509 |
|
|
cAA---------------------------------------------------------- |
510 |
|
|
c FIN DE BOUCLE SUR K |
511 |
|
|
9999 CONTINUE |
512 |
|
|
c |
513 |
|
|
cAA----------------------------------------------------------- |
514 |
|
|
c |
515 |
|
|
c Pluie ou neige au sol selon la temperature de la 1ere couche |
516 |
|
|
c |
517 |
|
|
DO i = 1, klon |
518 |
|
|
IF ((t(i,1)+d_t(i,1)) .LT. RTT) THEN |
519 |
|
|
snow(i) = zrfl(i) |
520 |
|
|
zlh_solid(i) = RLSTT-RLVTT |
521 |
|
|
ELSE |
522 |
|
|
rain(i) = zrfl(i) |
523 |
|
|
zlh_solid(i) = 0. |
524 |
|
|
ENDIF |
525 |
|
|
ENDDO |
526 |
|
|
C |
527 |
|
|
C For energy conservation : when snow is present, the solification |
528 |
|
|
c latent heat is considered. |
529 |
|
|
DO k = 1, klev |
530 |
|
|
DO i = 1, klon |
531 |
|
|
zcpair=RCPD*(1.0+RVTMP2*(q(i,k)+d_q(i,k))) |
532 |
|
|
zmair=(paprs(i,k)-paprs(i,k+1))/RG |
533 |
|
|
zm_solid = (prfl(i,k)-prfl(i,k+1)+psfl(i,k)-psfl(i,k+1))*dtime |
534 |
|
|
d_t(i,k) = d_t(i,k) + zlh_solid(i) *zm_solid / (zcpair*zmair) |
535 |
|
|
END DO |
536 |
|
|
END DO |
537 |
|
|
c |
538 |
|
|
RETURN |
539 |
|
|
END |