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SUBROUTINE newmicro (paprs, pplay,ok_newmicro, & |
module newmicro_m |
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t, pqlwp, pclc, pcltau, pclemi, & |
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pch, pcl, pcm, pct, pctlwp, & |
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xflwp, xfiwp, xflwc, xfiwc, & |
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ok_aie, & |
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sulfate, sulfate_pi, & |
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bl95_b0, bl95_b1, & |
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cldtaupi, re, fl) |
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! From LMDZ4/libf/phylmd/newmicro.F,v 1.2 2004/06/03 09:22:43 |
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use dimens_m |
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use dimphy |
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use SUPHEC_M |
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use nuagecom |
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IMPLICIT none |
IMPLICIT none |
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!====================================================================== |
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! Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910 |
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! Objet: Calculer epaisseur optique et emmissivite des nuages |
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!====================================================================== |
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! Arguments: |
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! t-------input-R-temperature |
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! pqlwp---input-R-eau liquide nuageuse dans l'atmosphere (kg/kg) |
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! pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1) |
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! |
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! ok_aie--input-L-apply aerosol indirect effect or not |
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! sulfate-input-R-sulfate aerosol mass concentration [um/m^3] |
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! sulfate_pi-input-R-dito, pre-industrial value |
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! bl95_b0-input-R-a parameter, may be varied for tests (s-sea, l-land) |
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! bl95_b1-input-R-a parameter, may be varied for tests ( -"- ) |
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! |
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! cldtaupi-output-R-pre-industrial value of cloud optical thickness, |
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! needed for the diagnostics of the aerosol indirect |
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! radiative forcing (see radlwsw) |
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! re------output-R-Cloud droplet effective radius multiplied by fl [um] |
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! fl------output-R-Denominator to re, introduced to avoid problems in |
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! the averaging of the output. fl is the fraction of liquid |
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! water clouds within a grid cell |
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! pcltau--output-R-epaisseur optique des nuages |
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! pclemi--output-R-emissivite des nuages (0 a 1) |
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!====================================================================== |
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! |
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! |
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REAL, intent(in):: paprs(klon,klev+1) |
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real, intent(in):: pplay(klon,klev) |
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REAL, intent(in):: t(klon,klev) |
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! |
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REAL pclc(klon,klev) |
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REAL pqlwp(klon,klev) |
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REAL pcltau(klon,klev), pclemi(klon,klev) |
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! |
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REAL pct(klon), pctlwp(klon), pch(klon), pcl(klon), pcm(klon) |
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! |
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LOGICAL lo |
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! |
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REAL cetahb, cetamb |
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PARAMETER (cetahb = 0.45, cetamb = 0.80) |
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! |
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INTEGER i, k |
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!IM: 091003 REAL zflwp, zradef, zfice, zmsac |
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REAL zflwp(klon), zradef, zfice, zmsac |
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!IM: 091003 rajout |
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REAL xflwp(klon), xfiwp(klon) |
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REAL xflwc(klon,klev), xfiwc(klon,klev) |
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! |
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REAL radius, rad_chaud |
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!c PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0) |
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!cc PARAMETER (rad_chaud=15.0, rad_froid=35.0) |
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! sintex initial PARAMETER (rad_chaud=10.0, rad_froid=30.0) |
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REAL coef, coef_froi, coef_chau |
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PARAMETER (coef_chau=0.13, coef_froi=0.09) |
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REAL seuil_neb, t_glace |
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PARAMETER (seuil_neb=0.001, t_glace=273.0-15.0) |
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INTEGER nexpo ! exponentiel pour glace/eau |
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PARAMETER (nexpo=6) |
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!cc PARAMETER (nexpo=1) |
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! -- sb: |
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logical ok_newmicro |
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! parameter (ok_newmicro=.FALSE.) |
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!IM: 091003 real rel, tc, rei, zfiwp |
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real rel, tc, rei, zfiwp(klon) |
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real k_liq, k_ice0, k_ice, DF |
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parameter (k_liq=0.0903, k_ice0=0.005) ! units=m2/g |
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parameter (DF=1.66) ! diffusivity factor |
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! sb -- |
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!jq for the aerosol indirect effect |
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!jq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003 |
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!jq |
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LOGICAL ok_aie ! Apply AIE or not? |
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LOGICAL ok_a1lwpdep ! a1 LWP dependent? |
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REAL sulfate(klon, klev) ! sulfate aerosol mass concentration [ug m-3] |
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REAL cdnc(klon, klev) ! cloud droplet number concentration [m-3] |
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REAL re(klon, klev) ! cloud droplet effective radius [um] |
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REAL sulfate_pi(klon, klev) ! sulfate aerosol mass concentration [ug m-3] (pre-industrial value) |
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REAL cdnc_pi(klon, klev) ! cloud droplet number concentration [m-3] (pi value) |
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REAL re_pi(klon, klev) ! cloud droplet effective radius [um] (pi value) |
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REAL fl(klon, klev) ! xliq * rneb (denominator to re; fraction of liquid water clouds within the grid cell) |
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REAL bl95_b0, bl95_b1 ! Parameter in B&L 95-Formula |
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REAL cldtaupi(klon, klev) ! pre-industrial cloud opt thickness for diag |
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!jq-end |
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! |
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! Calculer l'epaisseur optique et l'emmissivite des nuages |
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! |
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!IM inversion des DO |
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DO i = 1, klon |
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xflwp(i)=0. |
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xfiwp(i)=0. |
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DO k = 1, klev |
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! |
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xflwc(i,k)=0. |
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xfiwc(i,k)=0. |
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! |
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rad_chaud = rad_chau1 |
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IF (k.LE.3) rad_chaud = rad_chau2 |
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pclc(i,k) = MAX(pclc(i,k), seuil_neb) |
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zflwp(i) = 1000.*pqlwp(i,k)/RG/pclc(i,k) & |
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*(paprs(i,k)-paprs(i,k+1)) |
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zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace) |
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zfice = MIN(MAX(zfice,0.0),1.0) |
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zfice = zfice**nexpo |
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radius = rad_chaud * (1.-zfice) + rad_froid * zfice |
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coef = coef_chau * (1.-zfice) + coef_froi * zfice |
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pcltau(i,k) = 3.0/2.0 * zflwp(i) / radius |
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pclemi(i,k) = 1.0 - EXP( - coef * zflwp(i)) |
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if (ok_newmicro) then |
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! -- liquid/ice cloud water paths: |
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zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace) |
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zfice = MIN(MAX(zfice,0.0),1.0) |
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zflwp(i) = 1000.*(1.-zfice)*pqlwp(i,k)/pclc(i,k) & |
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*(paprs(i,k)-paprs(i,k+1))/RG |
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zfiwp(i) = 1000.*zfice*pqlwp(i,k)/pclc(i,k) & |
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*(paprs(i,k)-paprs(i,k+1))/RG |
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xflwp(i) = xflwp(i)+ (1.-zfice)*pqlwp(i,k) & |
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*(paprs(i,k)-paprs(i,k+1))/RG |
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xfiwp(i) = xfiwp(i)+ zfice*pqlwp(i,k) & |
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*(paprs(i,k)-paprs(i,k+1))/RG |
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!IM Total Liquid/Ice water content |
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xflwc(i,k) = xflwc(i,k)+(1.-zfice)*pqlwp(i,k) |
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xfiwc(i,k) = xfiwc(i,k)+zfice*pqlwp(i,k) |
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!IM In-Cloud Liquid/Ice water content |
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! xflwc(i,k) = xflwc(i,k)+(1.-zfice)*pqlwp(i,k)/pclc(i,k) |
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! xfiwc(i,k) = xfiwc(i,k)+zfice*pqlwp(i,k)/pclc(i,k) |
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! -- effective cloud droplet radius (microns): |
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! for liquid water clouds: |
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IF (ok_aie) THEN |
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! Formula "D" of Boucher and Lohmann, Tellus, 1995 |
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! |
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cdnc(i,k) = 10.**(bl95_b0+bl95_b1* & |
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log(MAX(sulfate(i,k),1.e-4))/log(10.))*1.e6 !-m-3 |
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! Cloud droplet number concentration (CDNC) is restricted |
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! to be within [20, 1000 cm^3] |
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! |
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cdnc(i,k)=MIN(1000.e6,MAX(20.e6,cdnc(i,k))) |
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! |
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! |
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cdnc_pi(i,k) = 10.**(bl95_b0+bl95_b1* & |
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log(MAX(sulfate_pi(i,k),1.e-4))/log(10.))*1.e6 !-m-3 |
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cdnc_pi(i,k)=MIN(1000.e6,MAX(20.e6,cdnc_pi(i,k))) |
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! |
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! |
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! air density: pplay(i,k) / (RD * zT(i,k)) |
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! factor 1.1: derive effective radius from volume-mean radius |
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! factor 1000 is the water density |
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! _chaud means that this is the CDR for liquid water clouds |
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! |
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rad_chaud = & |
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1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) ) & |
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/ (4./3. * RPI * 1000. * cdnc(i,k)) )**(1./3.) |
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! |
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! Convert to um. CDR shall be at least 3 um. |
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! |
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! rad_chaud = MAX(rad_chaud*1.e6, 3.) |
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rad_chaud = MAX(rad_chaud*1.e6, 5.) |
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! Pre-industrial cloud opt thickness |
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! |
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! "radius" is calculated as rad_chaud above (plus the |
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! ice cloud contribution) but using cdnc_pi instead of |
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! cdnc. |
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radius = & |
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1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) ) & |
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/ (4./3. * RPI * 1000. * cdnc_pi(i,k)) )**(1./3.) |
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radius = MAX(radius*1.e6, 5.) |
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tc = t(i,k)-273.15 |
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rei = 0.71*tc + 61.29 |
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if (tc.le.-81.4) rei = 3.5 |
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if (zflwp(i).eq.0.) radius = 1. |
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if (zfiwp(i).eq.0. .or. rei.le.0.) rei = 1. |
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cldtaupi(i,k) = 3.0/2.0 * zflwp(i) / radius & |
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+ zfiwp(i) * (3.448e-03 + 2.431/rei) |
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ENDIF ! ok_aie |
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! For output diagnostics |
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! |
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! Cloud droplet effective radius [um] |
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! |
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! we multiply here with f * xl (fraction of liquid water |
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! clouds in the grid cell) to avoid problems in the |
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! averaging of the output. |
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! In the output of IOIPSL, derive the real cloud droplet |
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! effective radius as re/fl |
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! |
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fl(i,k) = pclc(i,k)*(1.-zfice) |
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re(i,k) = rad_chaud*fl(i,k) |
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!-jq end |
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rel = rad_chaud |
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! for ice clouds: as a function of the ambiant temperature |
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! [formula used by Iacobellis and Somerville (2000), with an |
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! asymptotical value of 3.5 microns at T<-81.4 C added to be |
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! consistent with observations of Heymsfield et al. 1986]: |
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tc = t(i,k)-273.15 |
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rei = 0.71*tc + 61.29 |
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if (tc.le.-81.4) rei = 3.5 |
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! -- cloud optical thickness : |
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! [for liquid clouds, traditional formula, |
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! for ice clouds, Ebert & Curry (1992)] |
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if (zflwp(i).eq.0.) rel = 1. |
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if (zfiwp(i).eq.0. .or. rei.le.0.) rei = 1. |
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pcltau(i,k) = 3.0/2.0 * ( zflwp(i)/rel ) & |
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+ zfiwp(i) * (3.448e-03 + 2.431/rei) |
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! -- cloud infrared emissivity: |
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! [the broadband infrared absorption coefficient is parameterized |
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! as a function of the effective cld droplet radius] |
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! Ebert and Curry (1992) formula as used by Kiehl & Zender (1995): |
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k_ice = k_ice0 + 1.0/rei |
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pclemi(i,k) = 1.0 & |
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- EXP( - coef_chau*zflwp(i) - DF*k_ice*zfiwp(i) ) |
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endif ! ok_newmicro |
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lo = (pclc(i,k) .LE. seuil_neb) |
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IF (lo) pclc(i,k) = 0.0 |
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IF (lo) pcltau(i,k) = 0.0 |
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IF (lo) pclemi(i,k) = 0.0 |
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IF (lo) cldtaupi(i,k) = 0.0 |
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IF (.NOT.ok_aie) cldtaupi(i,k)=pcltau(i,k) |
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ENDDO |
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ENDDO |
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!cc DO k = 1, klev |
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!cc DO i = 1, klon |
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!cc t(i,k) = t(i,k) |
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!cc pclc(i,k) = MAX( 1.e-5 , pclc(i,k) ) |
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!cc lo = pclc(i,k) .GT. (2.*1.e-5) |
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!cc zflwp = pqlwp(i,k)*1000.*(paprs(i,k)-paprs(i,k+1)) |
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!cc . /(rg*pclc(i,k)) |
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!cc zradef = 10.0 + (1.-sigs(k))*45.0 |
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!cc pcltau(i,k) = 1.5 * zflwp / zradef |
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!cc zfice=1.0-MIN(MAX((t(i,k)-263.)/(273.-263.),0.0),1.0) |
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!cc zmsac = 0.13*(1.0-zfice) + 0.08*zfice |
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!cc pclemi(i,k) = 1.-EXP(-zmsac*zflwp) |
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!cc if (.NOT.lo) pclc(i,k) = 0.0 |
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!cc if (.NOT.lo) pcltau(i,k) = 0.0 |
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!cc if (.NOT.lo) pclemi(i,k) = 0.0 |
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!cc ENDDO |
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!cc ENDDO |
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!ccccc print*, 'pas de nuage dans le rayonnement' |
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!ccccc DO k = 1, klev |
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!ccccc DO i = 1, klon |
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!ccccc pclc(i,k) = 0.0 |
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!ccccc pcltau(i,k) = 0.0 |
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!ccccc pclemi(i,k) = 0.0 |
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!ccccc ENDDO |
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!ccccc ENDDO |
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! |
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! COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS |
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! |
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DO i = 1, klon |
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pct(i)=1.0 |
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pch(i)=1.0 |
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pcm(i) = 1.0 |
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pcl(i) = 1.0 |
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pctlwp(i) = 0.0 |
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ENDDO |
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! |
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DO k = klev, 1, -1 |
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DO i = 1, klon |
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pctlwp(i) = pctlwp(i) & |
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+ pqlwp(i,k)*(paprs(i,k)-paprs(i,k+1))/RG |
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pct(i) = pct(i)*(1.0-pclc(i,k)) |
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if (pplay(i,k).LE.cetahb*paprs(i,1)) & |
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pch(i) = pch(i)*(1.0-pclc(i,k)) |
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if (pplay(i,k).GT.cetahb*paprs(i,1) .AND. & |
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pplay(i,k).LE.cetamb*paprs(i,1)) & |
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pcm(i) = pcm(i)*(1.0-pclc(i,k)) |
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if (pplay(i,k).GT.cetamb*paprs(i,1)) & |
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pcl(i) = pcl(i)*(1.0-pclc(i,k)) |
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ENDDO |
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ENDDO |
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! |
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DO i = 1, klon |
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pct(i)=1.-pct(i) |
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pch(i)=1.-pch(i) |
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pcm(i)=1.-pcm(i) |
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pcl(i)=1.-pcl(i) |
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ENDDO |
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END SUBROUTINE newmicro |
contains |
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| 7 |
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SUBROUTINE newmicro (paprs, play, t, qlwp, clc, cltau, clemi, cldh, & |
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cldl, cldm, cldt, ctlwp, flwp, fiwp, flwc, fiwc, ok_aie, sulfate, & |
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sulfate_pi, bl95_b0, bl95_b1, cldtaupi, re, fl) |
| 10 |
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! From LMDZ4/libf/phylmd/newmicro.F, version 1.2 2004/06/03 09:22:43 |
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| 13 |
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! Authors: Z. X. Li (LMD/CNRS), Johannes Quaas |
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! Date: 1993/09/10 |
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! Objet: calcul de l'épaisseur optique et de l'émissivité des nuages. |
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| 17 |
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USE conf_phys_m, ONLY: rad_chau1, rad_chau2 |
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USE dimphy, ONLY: klev, klon |
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USE suphec_m, ONLY: rd, rg |
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use nr_util, only: pi |
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REAL, intent(in):: paprs(:, :) ! (klon, klev+1) |
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real, intent(in):: play(:, :) ! (klon, klev) |
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REAL, intent(in):: t(:, :) ! (klon, klev) temperature |
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REAL, intent(in):: qlwp(:, :) ! (klon, klev) |
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! eau liquide nuageuse dans l'atmosphère (kg/kg) |
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REAL, intent(inout):: clc(:, :) ! (klon, klev) |
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! couverture nuageuse pour le rayonnement (0 à 1) |
| 31 |
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REAL, intent(out):: cltau(:, :) ! (klon, klev) épaisseur optique des nuages |
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REAL, intent(out):: clemi(:, :) ! (klon, klev) émissivité des nuages (0 à 1) |
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REAL, intent(out):: cldh(:), cldl(:), cldm(:), cldt(:) ! (klon) |
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REAL, intent(out):: ctlwp(:) ! (klon) |
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REAL, intent(out):: flwp(:), fiwp(:) ! (klon) |
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REAL, intent(out):: flwc(:, :), fiwc(:, :) ! (klon, klev) |
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LOGICAL, intent(in):: ok_aie ! apply aerosol indirect effect |
| 40 |
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REAL, intent(in):: sulfate(:, :) ! (klon, klev) |
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! sulfate aerosol mass concentration (micro g m-3) |
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REAL, intent(in):: sulfate_pi(:, :) ! (klon, klev) |
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! sulfate aerosol mass concentration (micro g m-3), pre-industrial value |
| 46 |
|
|
| 47 |
|
REAL, intent(in):: bl95_b0, bl95_b1 |
| 48 |
|
! Parameters in equation (D) of Boucher and Lohmann (1995, Tellus |
| 49 |
|
! B). They link cloud droplet number concentration to aerosol mass |
| 50 |
|
! concentration. |
| 51 |
|
|
| 52 |
|
REAL, intent(out):: cldtaupi(:, :) ! (klon, klev) |
| 53 |
|
! pre-industrial value of cloud optical thickness, needed for the |
| 54 |
|
! diagnosis of the aerosol indirect radiative forcing (see |
| 55 |
|
! radlwsw) |
| 56 |
|
|
| 57 |
|
REAL, intent(out):: re(:, :) ! (klon, klev) |
| 58 |
|
! cloud droplet effective radius multiplied by fl (micro m) |
| 59 |
|
|
| 60 |
|
REAL, intent(out):: fl(:, :) ! (klon, klev) |
| 61 |
|
! Denominator to re, introduced to avoid problems in the averaging |
| 62 |
|
! of the output. fl is the fraction of liquid water clouds within |
| 63 |
|
! a grid cell. |
| 64 |
|
|
| 65 |
|
! Local: |
| 66 |
|
|
| 67 |
|
REAL, PARAMETER:: cetahb = 0.45, cetamb = 0.8 |
| 68 |
|
INTEGER i, k |
| 69 |
|
REAL zflwp(klon), fice |
| 70 |
|
REAL radius, rad_chaud |
| 71 |
|
REAL, PARAMETER:: coef_chau = 0.13 |
| 72 |
|
REAL, PARAMETER:: seuil_neb = 0.001, t_glace = 273. - 15. |
| 73 |
|
real rel, tc, rei, zfiwp(klon) |
| 74 |
|
real k_ice |
| 75 |
|
real, parameter:: k_ice0 = 0.005 ! units=m2/g |
| 76 |
|
real, parameter:: DF = 1.66 ! diffusivity factor |
| 77 |
|
REAL cdnc(klon, klev) ! cloud droplet number concentration (m-3) |
| 78 |
|
|
| 79 |
|
REAL cdnc_pi(klon, klev) |
| 80 |
|
! cloud droplet number concentration, pre-industrial value (m-3) |
| 81 |
|
|
| 82 |
|
!----------------------------------------------------------------- |
| 83 |
|
|
| 84 |
|
! Calculer l'épaisseur optique et l'émissivité des nuages |
| 85 |
|
|
| 86 |
|
loop_horizontal: DO i = 1, klon |
| 87 |
|
flwp(i) = 0. |
| 88 |
|
fiwp(i) = 0. |
| 89 |
|
|
| 90 |
|
DO k = 1, klev |
| 91 |
|
clc(i, k) = MAX(clc(i, k), seuil_neb) |
| 92 |
|
|
| 93 |
|
! liquid/ice cloud water paths: |
| 94 |
|
|
| 95 |
|
fice = 1. - (t(i, k) - t_glace) / (273.13 - t_glace) |
| 96 |
|
fice = MIN(MAX(fice, 0.), 1.) |
| 97 |
|
|
| 98 |
|
zflwp(i) = 1000. * (1. - fice) * qlwp(i, k) / clc(i, k) & |
| 99 |
|
* (paprs(i, k) - paprs(i, k + 1)) / RG |
| 100 |
|
zfiwp(i) = 1000. * fice * qlwp(i, k) / clc(i, k) & |
| 101 |
|
* (paprs(i, k) - paprs(i, k + 1)) / RG |
| 102 |
|
|
| 103 |
|
flwp(i) = flwp(i) & |
| 104 |
|
+ (1. - fice) * qlwp(i, k) * (paprs(i, k) - paprs(i, k + 1)) / RG |
| 105 |
|
fiwp(i) = fiwp(i) & |
| 106 |
|
+ fice * qlwp(i, k) * (paprs(i, k) - paprs(i, k + 1)) / RG |
| 107 |
|
|
| 108 |
|
! Total Liquid/Ice water content |
| 109 |
|
flwc(i, k) = (1.-fice) * qlwp(i, k) |
| 110 |
|
fiwc(i, k) = fice * qlwp(i, k) |
| 111 |
|
! In-Cloud Liquid/Ice water content |
| 112 |
|
|
| 113 |
|
! effective cloud droplet radius (microns): |
| 114 |
|
|
| 115 |
|
! for liquid water clouds: |
| 116 |
|
IF (ok_aie) THEN |
| 117 |
|
cdnc(i, k) = 10.**(bl95_b0 + bl95_b1 & |
| 118 |
|
* log10(MAX(sulfate(i, k), 1e-4))) * 1.e6 |
| 119 |
|
cdnc_pi(i, k) = 10.**(bl95_b0 + bl95_b1 & |
| 120 |
|
* log10(MAX(sulfate_pi(i, k), 1e-4))) * 1e6 |
| 121 |
|
|
| 122 |
|
! Restrict to interval [20, 1000] cm^3: |
| 123 |
|
cdnc(i, k) = MIN(1000e6, MAX(20e6, cdnc(i, k))) |
| 124 |
|
cdnc_pi(i, k) = MIN(1000e6, MAX(20e6, cdnc_pi(i, k))) |
| 125 |
|
|
| 126 |
|
! air density: play(i, k) / (RD * T(i, k)) |
| 127 |
|
! factor 1.1: derive effective radius from volume-mean radius |
| 128 |
|
! factor 1000 is the water density |
| 129 |
|
! "_chaud" means that this is the CDR for liquid water clouds |
| 130 |
|
|
| 131 |
|
rad_chaud = 1.1 * ((qlwp(i, k) * play(i, k) / (RD * T(i, k))) & |
| 132 |
|
/ (4./3. * PI * 1000. * cdnc(i, k)))**(1./3.) |
| 133 |
|
|
| 134 |
|
! Convert to micro m and set a lower limit: |
| 135 |
|
rad_chaud = MAX(rad_chaud * 1e6, 5.) |
| 136 |
|
|
| 137 |
|
! Pre-industrial cloud optical thickness |
| 138 |
|
|
| 139 |
|
! "radius" is calculated as rad_chaud above (plus the |
| 140 |
|
! ice cloud contribution) but using cdnc_pi instead of |
| 141 |
|
! cdnc. |
| 142 |
|
radius = 1.1 * ((qlwp(i, k) * play(i, k) / (RD * T(i, k))) & |
| 143 |
|
/ (4./3. * PI * 1000. * cdnc_pi(i, k)))**(1./3.) |
| 144 |
|
radius = MAX(radius * 1e6, 5.) |
| 145 |
|
|
| 146 |
|
tc = t(i, k)-273.15 |
| 147 |
|
rei = merge(3.5, 0.71 * tc + 61.29, tc <= -81.4) |
| 148 |
|
if (zflwp(i) == 0.) radius = 1. |
| 149 |
|
if (zfiwp(i) == 0. .or. rei <= 0.) rei = 1. |
| 150 |
|
cldtaupi(i, k) = 3. / 2. * zflwp(i) / radius & |
| 151 |
|
+ zfiwp(i) * (3.448e-03 + 2.431 / rei) |
| 152 |
|
else |
| 153 |
|
rad_chaud = merge(rad_chau2, rad_chau1, k <= 3) |
| 154 |
|
ENDIF |
| 155 |
|
! For output diagnostics |
| 156 |
|
|
| 157 |
|
! Cloud droplet effective radius (micro m) |
| 158 |
|
|
| 159 |
|
! we multiply here with f * xl (fraction of liquid water |
| 160 |
|
! clouds in the grid cell) to avoid problems in the |
| 161 |
|
! averaging of the output. |
| 162 |
|
! In the output of IOIPSL, derive the real cloud droplet |
| 163 |
|
! effective radius as re/fl |
| 164 |
|
|
| 165 |
|
fl(i, k) = clc(i, k) * (1.-fice) |
| 166 |
|
re(i, k) = rad_chaud * fl(i, k) |
| 167 |
|
|
| 168 |
|
rel = rad_chaud |
| 169 |
|
! for ice clouds: as a function of the ambiant temperature |
| 170 |
|
! (formula used by Iacobellis and Somerville (2000), with an |
| 171 |
|
! asymptotical value of 3.5 microns at T<-81.4 C added to be |
| 172 |
|
! consistent with observations of Heymsfield et al. 1986): |
| 173 |
|
tc = t(i, k)-273.15 |
| 174 |
|
rei = merge(3.5, 0.71 * tc + 61.29, tc <= -81.4) |
| 175 |
|
|
| 176 |
|
! cloud optical thickness: |
| 177 |
|
|
| 178 |
|
! (for liquid clouds, traditional formula, |
| 179 |
|
! for ice clouds, Ebert & Curry (1992)) |
| 180 |
|
|
| 181 |
|
if (zflwp(i) == 0.) rel = 1. |
| 182 |
|
if (zfiwp(i) == 0. .or. rei <= 0.) rei = 1. |
| 183 |
|
cltau(i, k) = 3./2. * (zflwp(i)/rel) & |
| 184 |
|
+ zfiwp(i) * (3.448e-03 + 2.431/rei) |
| 185 |
|
|
| 186 |
|
! cloud infrared emissivity: |
| 187 |
|
|
| 188 |
|
! (the broadband infrared absorption coefficient is parameterized |
| 189 |
|
! as a function of the effective cld droplet radius) |
| 190 |
|
|
| 191 |
|
! Ebert and Curry (1992) formula as used by Kiehl & Zender (1995): |
| 192 |
|
k_ice = k_ice0 + 1. / rei |
| 193 |
|
|
| 194 |
|
clemi(i, k) = 1. - EXP(- coef_chau * zflwp(i) - DF * k_ice * zfiwp(i)) |
| 195 |
|
|
| 196 |
|
if (clc(i, k) <= seuil_neb) then |
| 197 |
|
clc(i, k) = 0. |
| 198 |
|
cltau(i, k) = 0. |
| 199 |
|
clemi(i, k) = 0. |
| 200 |
|
cldtaupi(i, k) = 0. |
| 201 |
|
end if |
| 202 |
|
|
| 203 |
|
IF (.NOT. ok_aie) cldtaupi(i, k) = cltau(i, k) |
| 204 |
|
ENDDO |
| 205 |
|
ENDDO loop_horizontal |
| 206 |
|
|
| 207 |
|
! COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS |
| 208 |
|
|
| 209 |
|
DO i = 1, klon |
| 210 |
|
cldt(i)=1. |
| 211 |
|
cldh(i)=1. |
| 212 |
|
cldm(i) = 1. |
| 213 |
|
cldl(i) = 1. |
| 214 |
|
ctlwp(i) = 0. |
| 215 |
|
ENDDO |
| 216 |
|
|
| 217 |
|
DO k = klev, 1, -1 |
| 218 |
|
DO i = 1, klon |
| 219 |
|
ctlwp(i) = ctlwp(i) & |
| 220 |
|
+ qlwp(i, k) * (paprs(i, k) - paprs(i, k + 1)) / RG |
| 221 |
|
cldt(i) = cldt(i) * (1.-clc(i, k)) |
| 222 |
|
if (play(i, k) <= cetahb * paprs(i, 1)) & |
| 223 |
|
cldh(i) = cldh(i) * (1. - clc(i, k)) |
| 224 |
|
if (play(i, k) > cetahb * paprs(i, 1) .AND. & |
| 225 |
|
play(i, k) <= cetamb * paprs(i, 1)) & |
| 226 |
|
cldm(i) = cldm(i) * (1.-clc(i, k)) |
| 227 |
|
if (play(i, k) > cetamb * paprs(i, 1)) & |
| 228 |
|
cldl(i) = cldl(i) * (1. - clc(i, k)) |
| 229 |
|
ENDDO |
| 230 |
|
ENDDO |
| 231 |
|
|
| 232 |
|
DO i = 1, klon |
| 233 |
|
cldt(i)=1.-cldt(i) |
| 234 |
|
cldh(i)=1.-cldh(i) |
| 235 |
|
cldm(i)=1.-cldm(i) |
| 236 |
|
cldl(i)=1.-cldl(i) |
| 237 |
|
ENDDO |
| 238 |
|
|
| 239 |
|
END SUBROUTINE newmicro |
| 240 |
|
|
| 241 |
|
end module newmicro_m |
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