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! $Header: /home/cvsroot/LMDZ4/libf/phylmd/newmicro.F,v 1.2 2004/06/03 09:22:43 lmdzadmin Exp $ |
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! |
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SUBROUTINE newmicro (paprs, pplay,ok_newmicro, |
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. t, pqlwp, pclc, pcltau, pclemi, |
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. pch, pcl, pcm, pct, pctlwp, |
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s xflwp, xfiwp, xflwc, xfiwc, |
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e ok_aie, |
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e sulfate, sulfate_pi, |
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e bl95_b0, bl95_b1, |
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s cldtaupi, re, fl) |
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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 |
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c====================================================================== |
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c Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910 |
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c Objet: Calculer epaisseur optique et emmissivite des nuages |
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c====================================================================== |
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c Arguments: |
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c t-------input-R-temperature |
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c pqlwp---input-R-eau liquide nuageuse dans l'atmosphere (kg/kg) |
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c pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1) |
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c |
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c ok_aie--input-L-apply aerosol indirect effect or not |
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c sulfate-input-R-sulfate aerosol mass concentration [um/m^3] |
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c sulfate_pi-input-R-dito, pre-industrial value |
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c bl95_b0-input-R-a parameter, may be varied for tests (s-sea, l-land) |
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c bl95_b1-input-R-a parameter, may be varied for tests ( -"- ) |
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c |
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c cldtaupi-output-R-pre-industrial value of cloud optical thickness, |
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c needed for the diagnostics of the aerosol indirect |
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c radiative forcing (see radlwsw) |
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c re------output-R-Cloud droplet effective radius multiplied by fl [um] |
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c fl------output-R-Denominator to re, introduced to avoid problems in |
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c the averaging of the output. fl is the fraction of liquid |
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c water clouds within a grid cell |
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c pcltau--output-R-epaisseur optique des nuages |
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c pclemi--output-R-emissivite des nuages (0 a 1) |
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c====================================================================== |
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C |
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c |
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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 t(klon,klev) |
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c |
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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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c |
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REAL pct(klon), pctlwp(klon), pch(klon), pcl(klon), pcm(klon) |
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c |
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LOGICAL lo |
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c |
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REAL cetahb, cetamb |
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PARAMETER (cetahb = 0.45, cetamb = 0.80) |
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C |
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INTEGER i, k |
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cIM: 091003 REAL zflwp, zradef, zfice, zmsac |
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REAL zflwp(klon), zradef, zfice, zmsac |
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cIM: 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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c |
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REAL radius, rad_chaud |
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cc PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0) |
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ccc PARAMETER (rad_chaud=15.0, rad_froid=35.0) |
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c 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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ccc PARAMETER (nexpo=1) |
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|
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c -- sb: |
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logical ok_newmicro |
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c parameter (ok_newmicro=.FALSE.) |
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cIM: 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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c sb -- |
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cjq for the aerosol indirect effect |
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cjq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003 |
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cjq |
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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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|
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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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|
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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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|
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REAL bl95_b0, bl95_b1 ! Parameter in B&L 95-Formula |
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|
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REAL cldtaupi(klon, klev) ! pre-industrial cloud opt thickness for diag |
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cjq-end |
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c |
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c Calculer l'epaisseur optique et l'emmissivite des nuages |
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c |
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cIM 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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c |
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xflwc(i,k)=0. |
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xfiwc(i,k)=0. |
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c |
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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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|
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if (ok_newmicro) then |
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|
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c -- liquid/ice cloud water paths: |
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|
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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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|
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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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|
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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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|
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cIM 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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cIM In-Cloud Liquid/Ice water content |
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c xflwc(i,k) = xflwc(i,k)+(1.-zfice)*pqlwp(i,k)/pclc(i,k) |
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c xfiwc(i,k) = xfiwc(i,k)+zfice*pqlwp(i,k)/pclc(i,k) |
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|
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c -- effective cloud droplet radius (microns): |
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|
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c 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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c rad_chaud = MAX(rad_chaud*1.e6, 3.) |
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rad_chaud = MAX(rad_chaud*1.e6, 5.) |
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|
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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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|
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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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|
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c-jq end |
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|
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rel = rad_chaud |
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c for ice clouds: as a function of the ambiant temperature |
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c [formula used by Iacobellis and Somerville (2000), with an |
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c asymptotical value of 3.5 microns at T<-81.4 C added to be |
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c 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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|
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c -- cloud optical thickness : |
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|
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c [for liquid clouds, traditional formula, |
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c for ice clouds, Ebert & Curry (1992)] |
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|
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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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|
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c -- cloud infrared emissivity: |
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|
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c [the broadband infrared absorption coefficient is parameterized |
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c as a function of the effective cld droplet radius] |
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|
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c 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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|
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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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|
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endif ! ok_newmicro |
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|
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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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|
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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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ccc DO k = 1, klev |
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ccc DO i = 1, klon |
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ccc t(i,k) = t(i,k) |
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ccc pclc(i,k) = MAX( 1.e-5 , pclc(i,k) ) |
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ccc lo = pclc(i,k) .GT. (2.*1.e-5) |
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ccc zflwp = pqlwp(i,k)*1000.*(paprs(i,k)-paprs(i,k+1)) |
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ccc . /(rg*pclc(i,k)) |
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ccc zradef = 10.0 + (1.-sigs(k))*45.0 |
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ccc pcltau(i,k) = 1.5 * zflwp / zradef |
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ccc zfice=1.0-MIN(MAX((t(i,k)-263.)/(273.-263.),0.0),1.0) |
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ccc zmsac = 0.13*(1.0-zfice) + 0.08*zfice |
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ccc pclemi(i,k) = 1.-EXP(-zmsac*zflwp) |
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ccc if (.NOT.lo) pclc(i,k) = 0.0 |
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ccc if (.NOT.lo) pcltau(i,k) = 0.0 |
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ccc if (.NOT.lo) pclemi(i,k) = 0.0 |
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ccc ENDDO |
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ccc ENDDO |
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cccccc print*, 'pas de nuage dans le rayonnement' |
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cccccc DO k = 1, klev |
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cccccc DO i = 1, klon |
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cccccc pclc(i,k) = 0.0 |
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cccccc pcltau(i,k) = 0.0 |
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cccccc pclemi(i,k) = 0.0 |
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cccccc ENDDO |
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cccccc ENDDO |
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C |
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C COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS |
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C |
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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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C |
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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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C |
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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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C |
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RETURN |
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END |
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