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SUBROUTINE fisrtilp(dtime,paprs,pplay,t,q,ptconv,ratqs,d_t,d_q,d_ql,rneb, & |
2 |
radliq,rain,snow,pfrac_impa,pfrac_nucl,pfrac_1nucl,frac_impa, & |
3 |
frac_nucl,prfl,psfl,rhcl) |
4 |
|
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! From phylmd/fisrtilp.F,v 1.2 2004/11/09 16:55:40 |
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! Auteur(s): Z.X. Li (LMD/CNRS) |
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! Date: le 20 mars 1995 |
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! Objet: condensation et precipitation stratiforme. |
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! schema de nuage |
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|
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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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use numer_rec, only: nr_erf |
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|
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IMPLICIT NONE |
21 |
|
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! Arguments: |
23 |
|
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REAL, INTENT (IN) :: & ! intervalle du temps (s) |
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dtime |
26 |
REAL, INTENT (IN) :: paprs(klon,klev+1) ! pression a inter-couche |
27 |
REAL, INTENT (IN) :: 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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! Coeffients de fraction lessivee : pour OFF-LINE |
41 |
|
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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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|
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! Fraction d'aerosols lessivee par impaction et par nucleation |
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! POur ON-LINE |
48 |
|
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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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!AA |
53 |
|
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! Options du programme: |
55 |
|
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REAL seuil_neb ! un nuage existe vraiment au-dela |
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PARAMETER (seuil_neb=0.001) |
58 |
|
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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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|
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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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|
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! Variables locales: |
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|
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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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|
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LOGICAL appel1er |
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SAVE appel1er |
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|
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!--------------------------------------------------------------- |
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|
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!AA Variables traceurs: |
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!AA Provisoire !!! Parametres alpha du lessivage |
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!AA A priori on a 4 scavenging numbers possibles |
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|
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REAL a_tr_sca(4) |
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SAVE a_tr_sca |
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|
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! Variables intermediaires |
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|
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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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!AA |
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REAL zmair, zcpair, zcpeau |
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! Pour la conversion eau-neige |
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REAL zlh_solid(klon), zm_solid |
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!IM |
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INTEGER klevm1 |
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!--------------------------------------------------------------- |
108 |
|
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! Fonctions en ligne: |
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|
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REAL fallvs, fallvc ! vitesse de chute pour crystaux de glace |
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REAL zzz |
113 |
|
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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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|
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DATA appel1er/ .TRUE./ |
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!ym |
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zdelq = 0.0 |
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|
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IF (appel1er) THEN |
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|
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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)>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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! stop 1 |
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END IF |
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appel1er = .FALSE. |
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|
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!AA 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 |
138 |
|
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!AA Initialisation a 1 des coefs des fractions lessivees |
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|
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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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END DO |
147 |
END DO |
148 |
|
149 |
|
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END IF ! test sur appel1er |
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!MAf Initialisation a 0 de zoliq |
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DO i = 1, klon |
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zoliq(i) = 0. |
154 |
END DO |
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! Determiner les nuages froids par leur temperature |
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! nexpo regle la raideur de la transition eau liquide / eau glace. |
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|
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ztglace = rtt - 15.0 |
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nexpo = 6 |
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!cc nexpo = 1 |
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|
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! Initialiser les sorties: |
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|
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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 |
168 |
END DO |
169 |
END DO |
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|
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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. |
180 |
END DO |
181 |
END DO |
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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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END DO |
186 |
|
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! Initialiser le flux de precipitation a zero |
188 |
|
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DO i = 1, klon |
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zrfl(i) = 0.0 |
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zneb(i) = seuil_neb |
192 |
END DO |
193 |
|
194 |
|
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!AA Pour plus de securite |
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|
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zalpha_tr = 0. |
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zfrac_lessi = 0. |
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|
200 |
!AA---------------------------------------------------------- |
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|
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! Boucle verticale (du haut vers le bas) |
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|
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!IM : klevm1 |
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klevm1 = klev - 1 |
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DO k = klev, 1, -1 |
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|
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!AA---------------------------------------------------------- |
209 |
|
210 |
DO i = 1, klon |
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zt(i) = t(i,k) |
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zq(i) = q(i,k) |
213 |
END DO |
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|
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! Calculer la varition de temp. de l'air du a la chaleur sensible |
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! transporter par la pluie. |
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! Il resterait a rajouter cet effet de la chaleur sensible sur les |
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! flux de surface, du a la diff. de temp. entre le 1er niveau et la |
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! surface. |
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|
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DO i = 1, klon |
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IF (k<=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+zmair*zcpair* & |
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zt(i))/(zmair*zcpair+zrfl(i)*dtime*zcpeau) |
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!C WRITE (6,*) 'cppluie ', zt(i)-(t(i,k+1)+d_t(i,k+1)) |
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END IF |
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END DO |
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|
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! Calculer l'evaporation de la precipitation |
233 |
|
234 |
|
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|
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IF (evap_prec) THEN |
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DO i = 1, klon |
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IF (zrfl(i)>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)<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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END IF |
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END IF |
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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)))*rg*dtime/ & |
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(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))/rg/dtime |
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|
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! pour la glace, on réévapore toute la précip dans la couche du dessous |
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! la glace venant de la couche du dessus est simplement dans la couche |
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! du dessous. |
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|
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IF (zt(i)<t_coup .AND. reevap_ice) zrfln(i) = 0. |
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|
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zq(i) = zq(i) - (zrfln(i)-zrfl(i))*(rg/(paprs(i,k)-paprs(i, & |
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k+1)))*dtime |
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zt(i) = zt(i) + (zrfln(i)-zrfl(i))*(rg/(paprs(i,k)-paprs(i, & |
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k+1)))*dtime*rlvtt/rcpd/(1.0+rvtmp2*zq(i)) |
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zrfl(i) = zrfln(i) |
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END IF |
272 |
END DO |
273 |
END IF |
274 |
|
275 |
! Calculer Qs et L/Cp*dQs/dT: |
276 |
|
277 |
IF (thermcep) THEN |
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DO i = 1, klon |
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zdelta = max(0.,sign(1.,rtt-zt(i))) |
280 |
zcvm5 = r5les*rlvtt*(1.-zdelta) + r5ies*rlstt*zdelta |
281 |
zcvm5 = zcvm5/rcpd/(1.0+rvtmp2*zq(i)) |
282 |
zqs(i) = r2es*foeew(zt(i),zdelta)/pplay(i,k) |
283 |
zqs(i) = min(0.5,zqs(i)) |
284 |
zcor = 1./(1.-retv*zqs(i)) |
285 |
zqs(i) = zqs(i)*zcor |
286 |
zdqs(i) = foede(zt(i),zdelta,zcvm5,zqs(i),zcor) |
287 |
END DO |
288 |
ELSE |
289 |
DO i = 1, klon |
290 |
IF (zt(i)<t_coup) THEN |
291 |
zqs(i) = qsats(zt(i))/pplay(i,k) |
292 |
zdqs(i) = dqsats(zt(i),zqs(i)) |
293 |
ELSE |
294 |
zqs(i) = qsatl(zt(i))/pplay(i,k) |
295 |
zdqs(i) = dqsatl(zt(i),zqs(i)) |
296 |
END IF |
297 |
END DO |
298 |
END IF |
299 |
|
300 |
! Determiner la condensation partielle et calculer la quantite |
301 |
! de l'eau condensee: |
302 |
|
303 |
IF (cpartiel) THEN |
304 |
|
305 |
! print*,'Dans partiel k=',k |
306 |
|
307 |
! Calcul de l'eau condensee et de la fraction nuageuse et de l'eau |
308 |
! nuageuse a partir des PDF de Sandrine Bony. |
309 |
! rneb : fraction nuageuse |
310 |
! zqn : eau totale dans le nuage |
311 |
! zcond : eau condensee moyenne dans la maille. |
312 |
! on prend en compte le réchauffement qui diminue la partie condensee |
313 |
|
314 |
! Version avec les raqts |
315 |
|
316 |
IF (iflag_pdf==0) THEN |
317 |
|
318 |
DO i = 1, klon |
319 |
zdelq = min(ratqs(i,k),0.99)*zq(i) |
320 |
rneb(i,k) = (zq(i)+zdelq-zqs(i))/(2.0*zdelq) |
321 |
zqn(i) = (zq(i)+zdelq+zqs(i))/2.0 |
322 |
END DO |
323 |
|
324 |
ELSE |
325 |
|
326 |
! Version avec les nouvelles PDFs. |
327 |
DO i = 1, klon |
328 |
IF (zq(i)<1.E-15) THEN |
329 |
!C Lionel GUEZ print*,'ZQ(',i,',',k,')=',zq(i) |
330 |
zq(i) = 1.E-15 |
331 |
END IF |
332 |
END DO |
333 |
DO i = 1, klon |
334 |
zpdf_sig(i) = ratqs(i,k)*zq(i) |
335 |
zpdf_k(i) = -sqrt(log(1.+(zpdf_sig(i)/zq(i))**2)) |
336 |
zpdf_delta(i) = log(zq(i)/zqs(i)) |
337 |
zpdf_a(i) = zpdf_delta(i)/(zpdf_k(i)*sqrt(2.)) |
338 |
zpdf_b(i) = zpdf_k(i)/(2.*sqrt(2.)) |
339 |
zpdf_e1(i) = zpdf_a(i) - zpdf_b(i) |
340 |
zpdf_e1(i) = sign(min(abs(zpdf_e1(i)),5.),zpdf_e1(i)) |
341 |
zpdf_e1(i) = 1. - nr_erf(zpdf_e1(i)) |
342 |
zpdf_e2(i) = zpdf_a(i) + zpdf_b(i) |
343 |
zpdf_e2(i) = sign(min(abs(zpdf_e2(i)),5.),zpdf_e2(i)) |
344 |
zpdf_e2(i) = 1. - nr_erf(zpdf_e2(i)) |
345 |
IF (zpdf_e1(i)<1.E-10) THEN |
346 |
rneb(i,k) = 0. |
347 |
zqn(i) = zqs(i) |
348 |
ELSE |
349 |
rneb(i,k) = 0.5*zpdf_e1(i) |
350 |
zqn(i) = zq(i)*zpdf_e2(i)/zpdf_e1(i) |
351 |
END IF |
352 |
|
353 |
END DO |
354 |
|
355 |
|
356 |
END IF |
357 |
! iflag_pdf |
358 |
DO i = 1, klon |
359 |
IF (rneb(i,k)<=0.0) zqn(i) = 0.0 |
360 |
IF (rneb(i,k)>=1.0) zqn(i) = zq(i) |
361 |
rneb(i,k) = max(0.0,min(1.0,rneb(i,k))) |
362 |
! zcond(i) = MAX(0.0,zqn(i)-zqs(i))*rneb(i,k)/(1.+zdqs(i)) |
363 |
! On ne divise pas par 1+zdqs pour forcer a avoir l'eau predite par |
364 |
! la convection. |
365 |
! ATTENTION !!! Il va falloir verifier tout ca. |
366 |
zcond(i) = max(0.0,zqn(i)-zqs(i))*rneb(i,k) |
367 |
! print*,'ZDQS ',zdqs(i) |
368 |
!--Olivier |
369 |
rhcl(i,k) = (zqs(i)+zq(i)-zdelq)/2./zqs(i) |
370 |
IF (rneb(i,k)<=0.0) rhcl(i,k) = zq(i)/zqs(i) |
371 |
IF (rneb(i,k)>=1.0) rhcl(i,k) = 1.0 |
372 |
!--fin |
373 |
END DO |
374 |
ELSE |
375 |
DO i = 1, klon |
376 |
IF (zq(i)>zqs(i)) THEN |
377 |
rneb(i,k) = 1.0 |
378 |
ELSE |
379 |
rneb(i,k) = 0.0 |
380 |
END IF |
381 |
zcond(i) = max(0.0,zq(i)-zqs(i))/(1.+zdqs(i)) |
382 |
END DO |
383 |
END IF |
384 |
|
385 |
DO i = 1, klon |
386 |
zq(i) = zq(i) - zcond(i) |
387 |
! zt(i) = zt(i) + zcond(i) * RLVTT/RCPD |
388 |
zt(i) = zt(i) + zcond(i)*rlvtt/rcpd/(1.0+rvtmp2*zq(i)) |
389 |
END DO |
390 |
|
391 |
! Partager l'eau condensee en precipitation et eau liquide nuageuse |
392 |
|
393 |
DO i = 1, klon |
394 |
IF (rneb(i,k)>0.0) THEN |
395 |
zoliq(i) = zcond(i) |
396 |
zrho(i) = pplay(i,k)/zt(i)/rd |
397 |
zdz(i) = (paprs(i,k)-paprs(i,k+1))/(zrho(i)*rg) |
398 |
zfice(i) = 1.0 - (zt(i)-ztglace)/(273.13-ztglace) |
399 |
zfice(i) = min(max(zfice(i),0.0),1.0) |
400 |
zfice(i) = zfice(i)**nexpo |
401 |
zneb(i) = max(rneb(i,k),seuil_neb) |
402 |
radliq(i,k) = zoliq(i)/float(ninter+1) |
403 |
END IF |
404 |
END DO |
405 |
|
406 |
DO n = 1, ninter |
407 |
DO i = 1, klon |
408 |
IF (rneb(i,k)>0.0) THEN |
409 |
zrhol(i) = zrho(i)*zoliq(i)/zneb(i) |
410 |
|
411 |
IF (ptconv(i,k)) THEN |
412 |
zcl(i) = cld_lc_con |
413 |
zct(i) = 1./cld_tau_con |
414 |
ELSE |
415 |
zcl(i) = cld_lc_lsc |
416 |
zct(i) = 1./cld_tau_lsc |
417 |
END IF |
418 |
! quantité d'eau à élminier. |
419 |
zchau(i) = zct(i)*dtime/float(ninter)*zoliq(i)* & |
420 |
(1.0-exp(-(zoliq(i)/zneb(i)/zcl(i))**2))*(1.-zfice(i)) |
421 |
! meme chose pour la glace. |
422 |
IF (ptconv(i,k)) THEN |
423 |
zfroi(i) = dtime/float(ninter)/zdz(i)*zoliq(i)* & |
424 |
fallvc(zrhol(i))*zfice(i) |
425 |
ELSE |
426 |
zfroi(i) = dtime/float(ninter)/zdz(i)*zoliq(i)* & |
427 |
fallvs(zrhol(i))*zfice(i) |
428 |
END IF |
429 |
ztot(i) = zchau(i) + zfroi(i) |
430 |
IF (zneb(i)==seuil_neb) ztot(i) = 0.0 |
431 |
ztot(i) = min(max(ztot(i),0.0),zoliq(i)) |
432 |
zoliq(i) = max(zoliq(i)-ztot(i),0.0) |
433 |
radliq(i,k) = radliq(i,k) + zoliq(i)/float(ninter+1) |
434 |
END IF |
435 |
END DO |
436 |
END DO |
437 |
|
438 |
DO i = 1, klon |
439 |
IF (rneb(i,k)>0.0) THEN |
440 |
d_ql(i,k) = zoliq(i) |
441 |
zrfl(i) = zrfl(i) + max(zcond(i)-zoliq(i),0.0)*(paprs(i,k)-paprs(i & |
442 |
,k+1))/(rg*dtime) |
443 |
END IF |
444 |
IF (zt(i)<rtt) THEN |
445 |
psfl(i,k) = zrfl(i) |
446 |
ELSE |
447 |
prfl(i,k) = zrfl(i) |
448 |
END IF |
449 |
END DO |
450 |
|
451 |
! Calculer les tendances de q et de t: |
452 |
|
453 |
DO i = 1, klon |
454 |
d_q(i,k) = zq(i) - q(i,k) |
455 |
d_t(i,k) = zt(i) - t(i,k) |
456 |
END DO |
457 |
|
458 |
!AA--------------- Calcul du lessivage stratiforme ------------- |
459 |
|
460 |
DO i = 1, klon |
461 |
zprec_cond(i) = max(zcond(i)-zoliq(i),0.0)* & |
462 |
(paprs(i,k)-paprs(i,k+1))/rg |
463 |
IF (rneb(i,k)>0.0 .AND. zprec_cond(i)>0.) THEN |
464 |
!AA lessivage nucleation LMD5 dans la couche elle-meme |
465 |
IF (t(i,k)>=ztglace) THEN |
466 |
zalpha_tr = a_tr_sca(3) |
467 |
ELSE |
468 |
zalpha_tr = a_tr_sca(4) |
469 |
END IF |
470 |
zfrac_lessi = 1. - exp(zalpha_tr*zprec_cond(i)/zneb(i)) |
471 |
pfrac_nucl(i,k) = pfrac_nucl(i,k)*(1.-zneb(i)*zfrac_lessi) |
472 |
frac_nucl(i,k) = 1. - zneb(i)*zfrac_lessi |
473 |
|
474 |
! nucleation avec un facteur -1 au lieu de -0.5 |
475 |
zfrac_lessi = 1. - exp(-zprec_cond(i)/zneb(i)) |
476 |
pfrac_1nucl(i,k) = pfrac_1nucl(i,k)*(1.-zneb(i)*zfrac_lessi) |
477 |
END IF |
478 |
|
479 |
|
480 |
END DO |
481 |
!AA Lessivage par impaction dans les couches en-dessous |
482 |
! boucle sur i |
483 |
DO kk = k - 1, 1, -1 |
484 |
DO i = 1, klon |
485 |
IF (rneb(i,k)>0.0 .AND. zprec_cond(i)>0.) THEN |
486 |
IF (t(i,kk)>=ztglace) THEN |
487 |
zalpha_tr = a_tr_sca(1) |
488 |
ELSE |
489 |
zalpha_tr = a_tr_sca(2) |
490 |
END IF |
491 |
zfrac_lessi = 1. - exp(zalpha_tr*zprec_cond(i)/zneb(i)) |
492 |
pfrac_impa(i,kk) = pfrac_impa(i,kk)*(1.-zneb(i)*zfrac_lessi) |
493 |
frac_impa(i,kk) = 1. - zneb(i)*zfrac_lessi |
494 |
END IF |
495 |
END DO |
496 |
END DO |
497 |
|
498 |
!AA---------------------------------------------------------- |
499 |
! FIN DE BOUCLE SUR K |
500 |
end DO |
501 |
|
502 |
!AA----------------------------------------------------------- |
503 |
|
504 |
! Pluie ou neige au sol selon la temperature de la 1ere couche |
505 |
|
506 |
DO i = 1, klon |
507 |
IF ((t(i,1)+d_t(i,1))<rtt) THEN |
508 |
snow(i) = zrfl(i) |
509 |
zlh_solid(i) = rlstt - rlvtt |
510 |
ELSE |
511 |
rain(i) = zrfl(i) |
512 |
zlh_solid(i) = 0. |
513 |
END IF |
514 |
END DO |
515 |
|
516 |
! For energy conservation : when snow is present, the solification |
517 |
! latent heat is considered. |
518 |
DO k = 1, klev |
519 |
DO i = 1, klon |
520 |
zcpair = rcpd*(1.0+rvtmp2*(q(i,k)+d_q(i,k))) |
521 |
zmair = (paprs(i,k)-paprs(i,k+1))/rg |
522 |
zm_solid = (prfl(i,k)-prfl(i,k+1)+psfl(i,k)-psfl(i,k+1))*dtime |
523 |
d_t(i,k) = d_t(i,k) + zlh_solid(i)*zm_solid/(zcpair*zmair) |
524 |
END DO |
525 |
END DO |
526 |
|
527 |
END SUBROUTINE fisrtilp |