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module fisrtilp_m |
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|
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IMPLICIT NONE |
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|
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contains |
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|
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SUBROUTINE fisrtilp(dtime, paprs, pplay, t, q, ptconv, ratqs, d_t, d_q, & |
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d_ql, rneb, radliq, rain, snow, pfrac_impa, pfrac_nucl, pfrac_1nucl, & |
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frac_impa, frac_nucl, prfl, psfl, rhcl) |
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|
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! From phylmd/fisrtilp.F, version 1.2 2004/11/09 16:55:40 |
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! First author: Z. X. Li (LMD/CNRS), 20 mars 1995 |
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! Other authors: Olivier, AA, IM, YM, MAF |
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|
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! Objet : condensation et précipitation stratiforme, schéma de |
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! nuage, schéma de condensation à grande échelle (pluie). |
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|
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USE comfisrtilp, ONLY: cld_lc_con, cld_lc_lsc, cld_tau_con, & |
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cld_tau_lsc, coef_eva, ffallv_con, ffallv_lsc, iflag_pdf, reevap_ice |
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USE dimphy, ONLY: klev, klon |
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USE fcttre, ONLY: dqsatl, dqsats, foede, foeew, qsatl, qsats, thermcep |
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USE numer_rec_95, ONLY: nr_erf |
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USE suphec_m, ONLY: rcpd, rd, retv, rg, rlstt, rlvtt, rtt |
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USE yoethf_m, ONLY: r2es, r5ies, r5les, rvtmp2 |
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|
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! Arguments: |
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|
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REAL, INTENT (IN):: 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, INTENT (IN):: pplay(klon, klev) ! pression au milieu de couche |
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REAL, INTENT (IN):: t(klon, klev) ! temperature (K) |
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REAL, INTENT (IN):: q(klon, klev) ! humidite specifique (kg/kg) |
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LOGICAL, INTENT (IN):: ptconv(klon, klev) |
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|
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REAL, INTENT (IN):: ratqs(klon, klev) |
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! determine la largeur de distribution de vapeur |
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|
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REAL, INTENT (out):: d_t(klon, klev) ! incrementation de la temperature (K) |
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REAL, INTENT (out):: d_q(klon, klev) ! incrementation de la vapeur d'eau |
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REAL, INTENT (out):: d_ql(klon, klev) ! incrementation de l'eau liquide |
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REAL, INTENT (out):: rneb(klon, klev) ! fraction nuageuse |
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|
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REAL, INTENT (out):: radliq(klon, klev) |
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! eau liquide utilisee dans rayonnement |
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|
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REAL, INTENT (out):: rain(klon) ! pluies (mm/s) |
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REAL, INTENT (out):: snow(klon) ! neige (mm/s) |
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|
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! Coeffients de fraction lessivee : |
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REAL, INTENT (inout):: pfrac_impa(klon, klev) |
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REAL, INTENT (inout):: pfrac_nucl(klon, klev) |
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REAL, INTENT (inout):: pfrac_1nucl(klon, klev) |
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|
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! Fraction d'aerosols lessivee par impaction |
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REAL, INTENT (out):: frac_impa(klon, klev) |
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|
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! Fraction d'aerosols lessivee par nucleation |
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REAL, INTENT (out):: frac_nucl(klon, klev) |
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|
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REAL, INTENT (out):: prfl(klon, klev+1) |
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! flux d'eau precipitante aux interfaces (kg/m2/s) |
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|
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REAL, INTENT (out):: psfl(klon, klev+1) |
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! flux d'eau precipitante aux interfaces (kg/m2/s) |
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|
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REAL, INTENT (out):: rhcl(klon, klev) ! humidite relative en ciel clair |
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|
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! Local: |
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|
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REAL zct(klon), zcl(klon) |
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|
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! Options du programme: |
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|
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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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|
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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 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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INTEGER i, k, n, kk |
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REAL zqs(klon), zdqs(klon), zcor, zcvm5 |
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logical zdelta |
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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 = .TRUE. |
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|
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! Variables traceurs: |
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! Provisoire !!! Parametres alpha du lessivage |
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! A priori on a 4 scavenging numbers possibles |
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|
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REAL, save:: a_tr_sca(4) |
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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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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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|
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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 |
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|
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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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!--------------------------------------------------------------- |
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|
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zdelq = 0.0 |
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|
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IF (appel1er) THEN |
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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 / real(ninter) - 360.) > 0.001) THEN |
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PRINT *, "fisrtilp : ce n'est pas prévu, voir Z. X. Li", dtime |
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PRINT *, 'Je préfère un sous-intervalle de 6 minutes.' |
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END IF |
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appel1er = .FALSE. |
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|
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! 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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|
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! Initialisation a 1 des coefs des fractions lessivees |
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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 |
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END DO |
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END IF |
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|
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! Initialisation a 0 de zoliq |
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DO i = 1, klon |
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zoliq(i) = 0. |
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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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|
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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 |
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END DO |
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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. |
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END DO |
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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 |
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|
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! Initialiser le flux de precipitation a zero |
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|
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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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END DO |
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|
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! 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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|
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loop_vertical: DO k = klev, 1, -1 |
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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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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 <= klev - 1) 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 & |
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* zcpeau + zmair * zcpair* zt(i)) & |
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/ (zmair * zcpair + zrfl(i) * dtime * zcpeau) |
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END IF |
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END DO |
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|
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IF (evap_prec) THEN |
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! Calculer l'evaporation de la precipitation |
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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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zqs(i) = r2es*foeew(zt(i), rtt >= zt(i))/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 |
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! couche du dessous la glace venant de la couche du |
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! dessus est simplement dans la couche 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 |
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END DO |
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END IF |
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|
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! Calculer Qs et L/Cp*dQs/dT: |
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|
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IF (thermcep) THEN |
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DO i = 1, klon |
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zdelta = rtt >= zt(i) |
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zcvm5 = merge(r5ies*rlstt, r5les*rlvtt, 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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END DO |
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ELSE |
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DO i = 1, klon |
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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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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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END IF |
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END DO |
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END IF |
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|
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! Determiner la condensation partielle et calculer la quantite |
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! de l'eau condensee: |
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|
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IF (cpartiel) THEN |
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! Calcul de l'eau condensee et de la fraction nuageuse et de l'eau |
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! nuageuse a partir des PDF de Sandrine Bony. |
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! rneb : fraction nuageuse |
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! zqn : eau totale dans le nuage |
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! zcond : eau condensee moyenne dans la maille. |
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|
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! on prend en compte le réchauffement qui diminue |
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! la partie condensée |
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|
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! Version avec les ratqs |
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|
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IF (iflag_pdf==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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END DO |
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ELSE |
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! Version avec les nouvelles PDFs. |
| 311 |
DO i = 1, klon |
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IF (zq(i) < 1E-15) THEN |
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zq(i) = 1E-15 |
| 314 |
END IF |
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END DO |
| 316 |
DO i = 1, klon |
| 317 |
zpdf_sig(i) = ratqs(i, k)*zq(i) |
| 318 |
zpdf_k(i) = -sqrt(log(1.+(zpdf_sig(i)/zq(i))**2)) |
| 319 |
zpdf_delta(i) = log(zq(i)/zqs(i)) |
| 320 |
zpdf_a(i) = zpdf_delta(i)/(zpdf_k(i)*sqrt(2.)) |
| 321 |
zpdf_b(i) = zpdf_k(i)/(2.*sqrt(2.)) |
| 322 |
zpdf_e1(i) = zpdf_a(i) - zpdf_b(i) |
| 323 |
zpdf_e1(i) = sign(min(abs(zpdf_e1(i)), 5.), zpdf_e1(i)) |
| 324 |
zpdf_e1(i) = 1. - nr_erf(zpdf_e1(i)) |
| 325 |
zpdf_e2(i) = zpdf_a(i) + zpdf_b(i) |
| 326 |
zpdf_e2(i) = sign(min(abs(zpdf_e2(i)), 5.), zpdf_e2(i)) |
| 327 |
zpdf_e2(i) = 1. - nr_erf(zpdf_e2(i)) |
| 328 |
IF (zpdf_e1(i)<1.E-10) THEN |
| 329 |
rneb(i, k) = 0. |
| 330 |
zqn(i) = zqs(i) |
| 331 |
ELSE |
| 332 |
rneb(i, k) = 0.5*zpdf_e1(i) |
| 333 |
zqn(i) = zq(i)*zpdf_e2(i)/zpdf_e1(i) |
| 334 |
END IF |
| 335 |
END DO |
| 336 |
END IF |
| 337 |
|
| 338 |
DO i = 1, klon |
| 339 |
IF (rneb(i, k)<=0.0) zqn(i) = 0.0 |
| 340 |
IF (rneb(i, k)>=1.0) zqn(i) = zq(i) |
| 341 |
rneb(i, k) = max(0., min(1., rneb(i, k))) |
| 342 |
! On ne divise pas par 1 + zdqs pour forcer à avoir l'eau |
| 343 |
! prédite par la convection. Attention : il va falloir |
| 344 |
! verifier tout ca. |
| 345 |
zcond(i) = max(0., zqn(i)-zqs(i))*rneb(i, k) |
| 346 |
rhcl(i, k) = (zqs(i)+zq(i)-zdelq)/2./zqs(i) |
| 347 |
IF (rneb(i, k) <= 0.) rhcl(i, k) = zq(i) / zqs(i) |
| 348 |
IF (rneb(i, k) >= 1.) rhcl(i, k) = 1. |
| 349 |
END DO |
| 350 |
ELSE |
| 351 |
DO i = 1, klon |
| 352 |
IF (zq(i)>zqs(i)) THEN |
| 353 |
rneb(i, k) = 1.0 |
| 354 |
ELSE |
| 355 |
rneb(i, k) = 0.0 |
| 356 |
END IF |
| 357 |
zcond(i) = max(0.0, zq(i)-zqs(i))/(1.+zdqs(i)) |
| 358 |
END DO |
| 359 |
END IF |
| 360 |
|
| 361 |
DO i = 1, klon |
| 362 |
zq(i) = zq(i) - zcond(i) |
| 363 |
zt(i) = zt(i) + zcond(i)*rlvtt/rcpd/(1.0+rvtmp2*zq(i)) |
| 364 |
END DO |
| 365 |
|
| 366 |
! Partager l'eau condensee en precipitation et eau liquide nuageuse |
| 367 |
|
| 368 |
DO i = 1, klon |
| 369 |
IF (rneb(i, k)>0.0) THEN |
| 370 |
zoliq(i) = zcond(i) |
| 371 |
zrho(i) = pplay(i, k)/zt(i)/rd |
| 372 |
zdz(i) = (paprs(i, k)-paprs(i, k+1))/(zrho(i)*rg) |
| 373 |
zfice(i) = 1.0 - (zt(i)-ztglace)/(273.13-ztglace) |
| 374 |
zfice(i) = min(max(zfice(i), 0.0), 1.0) |
| 375 |
zfice(i) = zfice(i)**nexpo |
| 376 |
zneb(i) = max(rneb(i, k), seuil_neb) |
| 377 |
radliq(i, k) = zoliq(i)/real(ninter+1) |
| 378 |
END IF |
| 379 |
END DO |
| 380 |
|
| 381 |
DO n = 1, ninter |
| 382 |
DO i = 1, klon |
| 383 |
IF (rneb(i, k)>0.0) THEN |
| 384 |
zrhol(i) = zrho(i)*zoliq(i)/zneb(i) |
| 385 |
|
| 386 |
IF (ptconv(i, k)) THEN |
| 387 |
zcl(i) = cld_lc_con |
| 388 |
zct(i) = 1./cld_tau_con |
| 389 |
ELSE |
| 390 |
zcl(i) = cld_lc_lsc |
| 391 |
zct(i) = 1./cld_tau_lsc |
| 392 |
END IF |
| 393 |
! quantité d'eau à élminier. |
| 394 |
zchau(i) = zct(i)*dtime/real(ninter)*zoliq(i)* & |
| 395 |
(1.0-exp(-(zoliq(i)/zneb(i)/zcl(i))**2))*(1.-zfice(i)) |
| 396 |
! meme chose pour la glace. |
| 397 |
IF (ptconv(i, k)) THEN |
| 398 |
zfroi(i) = dtime/real(ninter)/zdz(i)*zoliq(i)* & |
| 399 |
fallvc(zrhol(i))*zfice(i) |
| 400 |
ELSE |
| 401 |
zfroi(i) = dtime/real(ninter)/zdz(i)*zoliq(i)* & |
| 402 |
fallvs(zrhol(i))*zfice(i) |
| 403 |
END IF |
| 404 |
ztot(i) = zchau(i) + zfroi(i) |
| 405 |
IF (zneb(i)==seuil_neb) ztot(i) = 0.0 |
| 406 |
ztot(i) = min(max(ztot(i), 0.0), zoliq(i)) |
| 407 |
zoliq(i) = max(zoliq(i)-ztot(i), 0.0) |
| 408 |
radliq(i, k) = radliq(i, k) + zoliq(i)/real(ninter+1) |
| 409 |
END IF |
| 410 |
END DO |
| 411 |
END DO |
| 412 |
|
| 413 |
DO i = 1, klon |
| 414 |
IF (rneb(i, k)>0.0) THEN |
| 415 |
d_ql(i, k) = zoliq(i) |
| 416 |
zrfl(i) = zrfl(i) + max(zcond(i) - zoliq(i), 0.) & |
| 417 |
* (paprs(i, k) - paprs(i, k + 1)) / (rg * dtime) |
| 418 |
END IF |
| 419 |
IF (zt(i)<rtt) THEN |
| 420 |
psfl(i, k) = zrfl(i) |
| 421 |
ELSE |
| 422 |
prfl(i, k) = zrfl(i) |
| 423 |
END IF |
| 424 |
END DO |
| 425 |
|
| 426 |
! Calculer les tendances de q et de t: |
| 427 |
DO i = 1, klon |
| 428 |
d_q(i, k) = zq(i) - q(i, k) |
| 429 |
d_t(i, k) = zt(i) - t(i, k) |
| 430 |
END DO |
| 431 |
|
| 432 |
! Calcul du lessivage stratiforme |
| 433 |
DO i = 1, klon |
| 434 |
zprec_cond(i) = max(zcond(i)-zoliq(i), 0.0)* & |
| 435 |
(paprs(i, k)-paprs(i, k+1))/rg |
| 436 |
IF (rneb(i, k)>0.0 .AND. zprec_cond(i)>0.) THEN |
| 437 |
! lessivage nucleation LMD5 dans la couche elle-meme |
| 438 |
IF (t(i, k)>=ztglace) THEN |
| 439 |
zalpha_tr = a_tr_sca(3) |
| 440 |
ELSE |
| 441 |
zalpha_tr = a_tr_sca(4) |
| 442 |
END IF |
| 443 |
zfrac_lessi = 1. - exp(zalpha_tr*zprec_cond(i)/zneb(i)) |
| 444 |
pfrac_nucl(i, k) = pfrac_nucl(i, k)*(1.-zneb(i)*zfrac_lessi) |
| 445 |
frac_nucl(i, k) = 1. - zneb(i)*zfrac_lessi |
| 446 |
|
| 447 |
! nucleation avec un facteur -1 au lieu de -0.5 |
| 448 |
zfrac_lessi = 1. - exp(-zprec_cond(i)/zneb(i)) |
| 449 |
pfrac_1nucl(i, k) = pfrac_1nucl(i, k)*(1.-zneb(i)*zfrac_lessi) |
| 450 |
END IF |
| 451 |
END DO |
| 452 |
|
| 453 |
! Lessivage par impaction dans les couches en-dessous |
| 454 |
! boucle sur i |
| 455 |
DO kk = k - 1, 1, -1 |
| 456 |
DO i = 1, klon |
| 457 |
IF (rneb(i, k)>0. .AND. zprec_cond(i)>0.) THEN |
| 458 |
IF (t(i, kk)>=ztglace) THEN |
| 459 |
zalpha_tr = a_tr_sca(1) |
| 460 |
ELSE |
| 461 |
zalpha_tr = a_tr_sca(2) |
| 462 |
END IF |
| 463 |
zfrac_lessi = 1. - exp(zalpha_tr*zprec_cond(i)/zneb(i)) |
| 464 |
pfrac_impa(i, kk) = pfrac_impa(i, kk)*(1.-zneb(i)*zfrac_lessi) |
| 465 |
frac_impa(i, kk) = 1. - zneb(i)*zfrac_lessi |
| 466 |
END IF |
| 467 |
END DO |
| 468 |
END DO |
| 469 |
end DO loop_vertical |
| 470 |
|
| 471 |
! Pluie ou neige au sol selon la temperature de la 1ere couche |
| 472 |
|
| 473 |
DO i = 1, klon |
| 474 |
IF ((t(i, 1)+d_t(i, 1))<rtt) THEN |
| 475 |
snow(i) = zrfl(i) |
| 476 |
zlh_solid(i) = rlstt - rlvtt |
| 477 |
ELSE |
| 478 |
rain(i) = zrfl(i) |
| 479 |
zlh_solid(i) = 0. |
| 480 |
END IF |
| 481 |
END DO |
| 482 |
|
| 483 |
! For energy conservation: when snow is present, the solification |
| 484 |
! latent heat is considered. |
| 485 |
DO k = 1, klev |
| 486 |
DO i = 1, klon |
| 487 |
zcpair = rcpd*(1.0+rvtmp2*(q(i, k)+d_q(i, k))) |
| 488 |
zmair = (paprs(i, k)-paprs(i, k+1))/rg |
| 489 |
zm_solid = (prfl(i, k)-prfl(i, k+1)+psfl(i, k)-psfl(i, k+1))*dtime |
| 490 |
d_t(i, k) = d_t(i, k) + zlh_solid(i)*zm_solid/(zcpair*zmair) |
| 491 |
END DO |
| 492 |
END DO |
| 493 |
|
| 494 |
END SUBROUTINE fisrtilp |
| 495 |
|
| 496 |
end module fisrtilp_m |
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