--- trunk/phylmd/nuage.f90 2013/11/15 18:45:49 76 +++ trunk/phylmd/nuage.f 2018/02/05 10:39:38 254 @@ -1,202 +1,115 @@ -SUBROUTINE nuage (paprs, pplay, & - t, pqlwp, pclc, pcltau, pclemi, & - pch, pcl, pcm, pct, pctlwp, & - ok_aie, & - sulfate, sulfate_pi, & - bl95_b0, bl95_b1, & - cldtaupi, re, fl) - ! - ! From LMDZ4/libf/phylmd/nuage.F, version 1.1.1.1 2004/05/19 12:53:07 - ! - use dimens_m - use dimphy - use SUPHEC_M +module nuage_m + IMPLICIT none - !====================================================================== - ! Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910 - ! Objet: Calculer epaisseur optique et emmissivite des nuages - !====================================================================== - ! Arguments: - ! t-------input-R-temperature - ! pqlwp---input-R-eau liquide nuageuse dans l'atmosphere (kg/kg) - ! pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1) - ! ok_aie--input-L-apply aerosol indirect effect or not - ! sulfate-input-R-sulfate aerosol mass concentration [um/m^3] - ! sulfate_pi-input-R-dito, pre-industrial value - ! bl95_b0-input-R-a parameter, may be varied for tests (s-sea, l-land) - ! bl95_b1-input-R-a parameter, may be varied for tests ( -"- ) - ! - ! cldtaupi-output-R-pre-industrial value of cloud optical thickness, - ! needed for the diagnostics of the aerosol indirect - ! radiative forcing (see radlwsw) - ! re------output-R-Cloud droplet effective radius multiplied by fl [um] - ! fl------output-R-Denominator to re, introduced to avoid problems in - ! the averaging of the output. fl is the fraction of liquid - ! water clouds within a grid cell - ! - ! pcltau--output-R-epaisseur optique des nuages - ! pclemi--output-R-emissivite des nuages (0 a 1) - !====================================================================== - ! - ! - REAL, intent(in):: paprs(klon,klev+1) - real, intent(in):: pplay(klon,klev) - REAL, intent(in):: t(klon,klev) - ! - REAL pclc(klon,klev) - REAL pqlwp(klon,klev) - REAL pcltau(klon,klev), pclemi(klon,klev) - ! - REAL pct(klon), pctlwp(klon), pch(klon), pcl(klon), pcm(klon) - ! - LOGICAL lo - ! - REAL cetahb, cetamb - PARAMETER (cetahb = 0.45, cetamb = 0.80) - ! - INTEGER i, k - REAL zflwp, zradef, zfice, zmsac - ! - REAL radius, rad_froid, rad_chaud, rad_chau1, rad_chau2 - PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0) - !cc PARAMETER (rad_chaud=15.0, rad_froid=35.0) - ! sintex initial PARAMETER (rad_chaud=10.0, rad_froid=30.0) - REAL coef, coef_froi, coef_chau - PARAMETER (coef_chau=0.13, coef_froi=0.09) - REAL seuil_neb, t_glace - PARAMETER (seuil_neb=0.001, t_glace=273.0-15.0) - INTEGER nexpo ! exponentiel pour glace/eau - PARAMETER (nexpo=6) - - !jq for the aerosol indirect effect - !jq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003 - !jq - LOGICAL ok_aie ! Apply AIE or not? - - REAL sulfate(klon, klev) ! sulfate aerosol mass concentration [ug m-3] - REAL cdnc(klon, klev) ! cloud droplet number concentration [m-3] - REAL re(klon, klev) ! cloud droplet effective radius [um] - REAL sulfate_pi(klon, klev) ! sulfate aerosol mass concentration [ug m-3] (pre-industrial value) - REAL cdnc_pi(klon, klev) ! cloud droplet number concentration [m-3] (pi value) - REAL re_pi(klon, klev) ! cloud droplet effective radius [um] (pi value) - - REAL fl(klon, klev) ! xliq * rneb (denominator to re ; fraction of liquid water clouds within the grid cell) - - REAL bl95_b0, bl95_b1 ! Parameter in B&L 95-Formula - - REAL cldtaupi(klon, klev) ! pre-industrial cloud opt thickness for diag - - !cc PARAMETER (nexpo=1) - ! - ! Calculer l'epaisseur optique et l'emmissivite des nuages - ! - DO k = 1, klev - DO i = 1, klon - rad_chaud = rad_chau1 - IF (k.LE.3) rad_chaud = rad_chau2 - - pclc(i,k) = MAX(pclc(i,k), seuil_neb) - zflwp = 1000.*pqlwp(i,k)/RG/pclc(i,k) & - *(paprs(i,k)-paprs(i,k+1)) - zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace) - zfice = MIN(MAX(zfice,0.0),1.0) - zfice = zfice**nexpo - - IF (ok_aie) THEN - ! Formula "D" of Boucher and Lohmann, Tellus, 1995 - ! - cdnc(i,k) = 10.**(bl95_b0+bl95_b1* & - log(MAX(sulfate(i,k),1.e-4))/log(10.))*1.e6 !-m-3 - ! Cloud droplet number concentration (CDNC) is restricted - ! to be within [20, 1000 cm^3] - ! - cdnc(i,k)=MIN(1000.e6,MAX(20.e6,cdnc(i,k))) - cdnc_pi(i,k) = 10.**(bl95_b0+bl95_b1* & - log(MAX(sulfate_pi(i,k),1.e-4))/log(10.))*1.e6 !-m-3 - cdnc_pi(i,k)=MIN(1000.e6,MAX(20.e6,cdnc_pi(i,k))) - ! - ! - ! air density: pplay(i,k) / (RD * zT(i,k)) - ! factor 1.1: derive effective radius from volume-mean radius - ! factor 1000 is the water density - ! _chaud means that this is the CDR for liquid water clouds - ! - rad_chaud = & - 1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) ) & - / (4./3. * RPI * 1000. * cdnc(i,k)) )**(1./3.) - ! - ! Convert to um. CDR shall be at least 3 um. - ! - rad_chaud = MAX(rad_chaud*1.e6, 3.) - - ! For output diagnostics - ! - ! Cloud droplet effective radius [um] - ! - ! we multiply here with f * xl (fraction of liquid water - ! clouds in the grid cell) to avoid problems in the - ! averaging of the output. - ! In the output of IOIPSL, derive the real cloud droplet - ! effective radius as re/fl - ! - fl(i,k) = pclc(i,k)*(1.-zfice) - re(i,k) = rad_chaud*fl(i,k) - - ! Pre-industrial cloud opt thickness - ! - ! "radius" is calculated as rad_chaud above (plus the - ! ice cloud contribution) but using cdnc_pi instead of - ! cdnc. - radius = MAX(1.1e6 * ( (pqlwp(i,k)*pplay(i,k)/(RD*T(i,k))) & - / (4./3.*RPI*1000.*cdnc_pi(i,k)) )**(1./3.), & - 3.) * (1.-zfice) + rad_froid * zfice - cldtaupi(i,k) = 3.0/2.0 * zflwp / radius - - END IF ! ok_aie - - radius = rad_chaud * (1.-zfice) + rad_froid * zfice - coef = coef_chau * (1.-zfice) + coef_froi * zfice - pcltau(i,k) = 3.0/2.0 * zflwp / radius - pclemi(i,k) = 1.0 - EXP( - coef * zflwp) - lo = (pclc(i,k) .LE. seuil_neb) - IF (lo) pclc(i,k) = 0.0 - IF (lo) pcltau(i,k) = 0.0 - IF (lo) pclemi(i,k) = 0.0 - - IF (.NOT.ok_aie) cldtaupi(i,k)=pcltau(i,k) - END DO - END DO - ! - ! COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS - ! - DO i = 1, klon - pct(i)=1.0 - pch(i)=1.0 - pcm(i) = 1.0 - pcl(i) = 1.0 - pctlwp(i) = 0.0 - END DO - ! - DO k = klev, 1, -1 - DO i = 1, klon - pctlwp(i) = pctlwp(i) & - + pqlwp(i,k)*(paprs(i,k)-paprs(i,k+1))/RG - pct(i) = pct(i)*(1.0-pclc(i,k)) - if (pplay(i,k).LE.cetahb*paprs(i,1)) & - pch(i) = pch(i)*(1.0-pclc(i,k)) - if (pplay(i,k).GT.cetahb*paprs(i,1) .AND. & - pplay(i,k).LE.cetamb*paprs(i,1)) & - pcm(i) = pcm(i)*(1.0-pclc(i,k)) - if (pplay(i,k).GT.cetamb*paprs(i,1)) & - pcl(i) = pcl(i)*(1.0-pclc(i,k)) - END DO - END DO - ! - DO i = 1, klon - pct(i)=1.-pct(i) - pch(i)=1.-pch(i) - pcm(i)=1.-pcm(i) - pcl(i)=1.-pcl(i) - END DO - ! -END SUBROUTINE nuage + +contains + + SUBROUTINE nuage (paprs, pplay, t, pqlwp, pclc, pcltau, pclemi, pch, pcl, & + pcm, pct, pctlwp) + + ! From LMDZ4/libf/phylmd/nuage.F, version 1.1.1.1, 2004/05/19 12:53:07 + + use dimphy, only: klon, klev + use SUPHEC_M, only: rg + + ! Author: Z. X. Li (LMD/CNRS) + ! Date: 1993/09/10 + ! Objet: Calculer \'epaisseur optique et \'emissivit\'e des nuages + + ! Arguments: + + REAL, intent(in):: paprs(klon, klev+1) + real, intent(in):: pplay(klon, klev) + REAL, intent(in):: t(klon, klev) ! temperature + + REAL, intent(in):: pqlwp(klon, klev) + ! eau liquide nuageuse dans l'atmosphere (kg/kg) + + REAL, intent(inout):: pclc(klon, klev) + ! couverture nuageuse pour le rayonnement (0 \`a 1) + + REAL, intent(out):: pcltau(klon, klev) ! \'epaisseur optique des nuages + real, intent(out):: pclemi(klon, klev) ! \'emissivit\'e des nuages (0 \`a 1) + REAL pch(klon), pcl(klon), pcm(klon), pct(klon), pctlwp(klon) + + ! Local: + + LOGICAL lo + + REAL cetahb, cetamb + PARAMETER (cetahb = 0.45, cetamb = 0.80) + + INTEGER i, k + REAL zflwp, zfice + + REAL radius, rad_froid, rad_chaud, rad_chau1, rad_chau2 + PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0) + REAL coef, coef_froi, coef_chau + PARAMETER (coef_chau=0.13, coef_froi=0.09) + REAL seuil_neb, t_glace + PARAMETER (seuil_neb=0.001, t_glace=273.0-15.0) + INTEGER nexpo ! exponentiel pour glace/eau + PARAMETER (nexpo=6) + + !-------------------------------------------------------------------- + + ! Calculer l'epaisseur optique et l'emmissivite des nuages + + DO k = 1, klev + DO i = 1, klon + rad_chaud = rad_chau1 + IF (k <= 3) rad_chaud = rad_chau2 + + pclc(i, k) = MAX(pclc(i, k), seuil_neb) + zflwp = 1000.*pqlwp(i, k)/RG/pclc(i, k) & + *(paprs(i, k)-paprs(i, k+1)) + zfice = 1.0 - (t(i, k)-t_glace) / (273.13-t_glace) + zfice = MIN(MAX(zfice, 0.0), 1.0) + zfice = zfice**nexpo + + radius = rad_chaud * (1.-zfice) + rad_froid * zfice + coef = coef_chau * (1.-zfice) + coef_froi * zfice + pcltau(i, k) = 3.0/2.0 * zflwp / radius + pclemi(i, k) = 1.0 - EXP(- coef * zflwp) + lo = (pclc(i, k) <= seuil_neb) + IF (lo) pclc(i, k) = 0.0 + IF (lo) pcltau(i, k) = 0.0 + IF (lo) pclemi(i, k) = 0.0 + END DO + END DO + + ! COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS + + DO i = 1, klon + pct(i)=1.0 + pch(i)=1.0 + pcm(i) = 1.0 + pcl(i) = 1.0 + pctlwp(i) = 0.0 + END DO + + DO k = klev, 1, -1 + DO i = 1, klon + pctlwp(i) = pctlwp(i) & + + pqlwp(i, k)*(paprs(i, k)-paprs(i, k+1))/RG + pct(i) = pct(i)*(1.0-pclc(i, k)) + if (pplay(i, k) <= cetahb*paprs(i, 1)) & + pch(i) = pch(i)*(1.0-pclc(i, k)) + if (pplay(i, k) > cetahb*paprs(i, 1) .AND. & + pplay(i, k) <= cetamb*paprs(i, 1)) & + pcm(i) = pcm(i)*(1.0-pclc(i, k)) + if (pplay(i, k) > cetamb*paprs(i, 1)) & + pcl(i) = pcl(i)*(1.0-pclc(i, k)) + END DO + END DO + + DO i = 1, klon + pct(i)=1.-pct(i) + pch(i)=1.-pch(i) + pcm(i)=1.-pcm(i) + pcl(i)=1.-pcl(i) + END DO + + END SUBROUTINE nuage + +end module nuage_m