| 1 | ! |
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| 2 | ! $Header$ |
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| 3 | ! |
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| 4 | SUBROUTINE newmicro (paprs, pplay,ok_newmicro, |
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| 5 | . t, pqlwp, pclc, pcltau, pclemi, |
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| 6 | . pch, pcl, pcm, pct, pctlwp, |
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| 7 | s xflwp, xfiwp, xflwc, xfiwc, |
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| 8 | e ok_aie, |
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| 9 | e sulfate, sulfate_pi, |
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| 10 | e bl95_b0, bl95_b1, |
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| 11 | s cldtaupi, re, fl) |
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| 12 | IMPLICIT none |
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| 13 | c====================================================================== |
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| 14 | c Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910 |
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| 15 | c Objet: Calculer epaisseur optique et emmissivite des nuages |
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| 16 | c====================================================================== |
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| 17 | c Arguments: |
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| 18 | c t-------input-R-temperature |
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| 19 | c pqlwp---input-R-eau liquide nuageuse dans l'atmosphere (kg/kg) |
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| 20 | c pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1) |
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| 21 | c |
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| 22 | c ok_aie--input-L-apply aerosol indirect effect or not |
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| 23 | c sulfate-input-R-sulfate aerosol mass concentration [um/m^3] |
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| 24 | c sulfate_pi-input-R-dito, pre-industrial value |
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| 25 | c bl95_b0-input-R-a parameter, may be varied for tests (s-sea, l-land) |
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| 26 | c bl95_b1-input-R-a parameter, may be varied for tests ( -"- ) |
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| 27 | c |
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| 28 | c cldtaupi-output-R-pre-industrial value of cloud optical thickness, |
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| 29 | c needed for the diagnostics of the aerosol indirect |
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| 30 | c radiative forcing (see radlwsw) |
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| 31 | c re------output-R-Cloud droplet effective radius multiplied by fl [um] |
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| 32 | c fl------output-R-Denominator to re, introduced to avoid problems in |
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| 33 | c the averaging of the output. fl is the fraction of liquid |
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| 34 | c water clouds within a grid cell |
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| 35 | c pcltau--output-R-epaisseur optique des nuages |
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| 36 | c pclemi--output-R-emissivite des nuages (0 a 1) |
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| 37 | c====================================================================== |
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| 38 | C |
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| 39 | #include "YOMCST.h" |
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| 40 | c |
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| 41 | #include "dimensions.h" |
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| 42 | #include "dimphy.h" |
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| 43 | #include "nuage.h" |
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| 44 | REAL paprs(klon,klev+1), pplay(klon,klev) |
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| 45 | REAL t(klon,klev) |
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| 46 | c |
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| 47 | REAL pclc(klon,klev) |
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| 48 | REAL pqlwp(klon,klev) |
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| 49 | REAL pcltau(klon,klev), pclemi(klon,klev) |
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| 50 | c |
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| 51 | REAL pct(klon), pctlwp(klon), pch(klon), pcl(klon), pcm(klon) |
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| 52 | c |
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| 53 | LOGICAL lo |
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| 54 | c |
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| 55 | REAL cetahb, cetamb |
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| 56 | PARAMETER (cetahb = 0.45, cetamb = 0.80) |
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| 57 | C |
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| 58 | INTEGER i, k |
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| 59 | cIM: 091003 REAL zflwp, zradef, zfice, zmsac |
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| 60 | REAL zflwp(klon), zradef, zfice, zmsac |
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| 61 | cIM: 091003 rajout |
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| 62 | REAL xflwp(klon), xfiwp(klon) |
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| 63 | REAL xflwc(klon,klev), xfiwc(klon,klev) |
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| 64 | c |
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| 65 | REAL radius, rad_chaud |
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| 66 | cc PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0) |
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| 67 | ccc PARAMETER (rad_chaud=15.0, rad_froid=35.0) |
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| 68 | c sintex initial PARAMETER (rad_chaud=10.0, rad_froid=30.0) |
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| 69 | REAL coef, coef_froi, coef_chau |
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| 70 | PARAMETER (coef_chau=0.13, coef_froi=0.09) |
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| 71 | REAL seuil_neb, t_glace |
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| 72 | PARAMETER (seuil_neb=0.001, t_glace=273.0-15.0) |
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| 73 | INTEGER nexpo ! exponentiel pour glace/eau |
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| 74 | PARAMETER (nexpo=6) |
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| 75 | ccc PARAMETER (nexpo=1) |
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| 76 | |
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| 77 | c -- sb: |
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| 78 | logical ok_newmicro |
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| 79 | c parameter (ok_newmicro=.FALSE.) |
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| 80 | cIM: 091003 real rel, tc, rei, zfiwp |
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| 81 | real rel, tc, rei, zfiwp(klon) |
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| 82 | real k_liq, k_ice0, k_ice, DF |
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| 83 | parameter (k_liq=0.0903, k_ice0=0.005) ! units=m2/g |
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| 84 | parameter (DF=1.66) ! diffusivity factor |
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| 85 | c sb -- |
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| 86 | cjq for the aerosol indirect effect |
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| 87 | cjq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003 |
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| 88 | cjq |
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| 89 | LOGICAL ok_aie ! Apply AIE or not? |
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| 90 | LOGICAL ok_a1lwpdep ! a1 LWP dependent? |
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| 91 | |
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| 92 | REAL sulfate(klon, klev) ! sulfate aerosol mass concentration [ug m-3] |
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| 93 | REAL cdnc(klon, klev) ! cloud droplet number concentration [m-3] |
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| 94 | REAL re(klon, klev) ! cloud droplet effective radius [um] |
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| 95 | REAL sulfate_pi(klon, klev) ! sulfate aerosol mass concentration [ug m-3] (pre-industrial value) |
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| 96 | REAL cdnc_pi(klon, klev) ! cloud droplet number concentration [m-3] (pi value) |
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| 97 | REAL re_pi(klon, klev) ! cloud droplet effective radius [um] (pi value) |
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| 98 | |
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| 99 | REAL fl(klon, klev) ! xliq * rneb (denominator to re; fraction of liquid water clouds within the grid cell) |
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| 100 | |
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| 101 | REAL bl95_b0, bl95_b1 ! Parameter in B&L 95-Formula |
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| 102 | |
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| 103 | REAL cldtaupi(klon, klev) ! pre-industrial cloud opt thickness for diag |
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| 104 | cjq-end |
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| 105 | c |
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| 106 | c Calculer l'epaisseur optique et l'emmissivite des nuages |
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| 107 | c |
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| 108 | cIM inversion des DO |
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| 109 | DO i = 1, klon |
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| 110 | xflwp(i)=0. |
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| 111 | xfiwp(i)=0. |
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| 112 | DO k = 1, klev |
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| 113 | c |
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| 114 | xflwc(i,k)=0. |
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| 115 | xfiwc(i,k)=0. |
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| 116 | c |
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| 117 | rad_chaud = rad_chau1 |
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| 118 | IF (k.LE.3) rad_chaud = rad_chau2 |
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| 119 | pclc(i,k) = MAX(pclc(i,k), seuil_neb) |
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| 120 | zflwp(i) = 1000.*pqlwp(i,k)/RG/pclc(i,k) |
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| 121 | . *(paprs(i,k)-paprs(i,k+1)) |
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| 122 | zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace) |
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| 123 | zfice = MIN(MAX(zfice,0.0),1.0) |
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| 124 | zfice = zfice**nexpo |
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| 125 | radius = rad_chaud * (1.-zfice) + rad_froid * zfice |
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| 126 | coef = coef_chau * (1.-zfice) + coef_froi * zfice |
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| 127 | pcltau(i,k) = 3.0/2.0 * zflwp(i) / radius |
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| 128 | pclemi(i,k) = 1.0 - EXP( - coef * zflwp(i)) |
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| 129 | |
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| 130 | if (ok_newmicro) then |
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| 131 | |
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| 132 | c -- liquid/ice cloud water paths: |
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| 133 | |
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| 134 | zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace) |
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| 135 | zfice = MIN(MAX(zfice,0.0),1.0) |
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| 136 | |
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| 137 | zflwp(i) = 1000.*(1.-zfice)*pqlwp(i,k)/pclc(i,k) |
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| 138 | : *(paprs(i,k)-paprs(i,k+1))/RG |
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| 139 | zfiwp(i) = 1000.*zfice*pqlwp(i,k)/pclc(i,k) |
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| 140 | : *(paprs(i,k)-paprs(i,k+1))/RG |
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| 141 | |
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| 142 | xflwp(i) = xflwp(i)+ (1.-zfice)*pqlwp(i,k) |
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| 143 | : *(paprs(i,k)-paprs(i,k+1))/RG |
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| 144 | xfiwp(i) = xfiwp(i)+ zfice*pqlwp(i,k) |
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| 145 | : *(paprs(i,k)-paprs(i,k+1))/RG |
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| 146 | |
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| 147 | cIM Total Liquid/Ice water content |
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| 148 | xflwc(i,k) = xflwc(i,k)+(1.-zfice)*pqlwp(i,k) |
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| 149 | xfiwc(i,k) = xfiwc(i,k)+zfice*pqlwp(i,k) |
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| 150 | cIM In-Cloud Liquid/Ice water content |
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| 151 | c xflwc(i,k) = xflwc(i,k)+(1.-zfice)*pqlwp(i,k)/pclc(i,k) |
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| 152 | c xfiwc(i,k) = xfiwc(i,k)+zfice*pqlwp(i,k)/pclc(i,k) |
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| 153 | |
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| 154 | c -- effective cloud droplet radius (microns): |
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| 155 | |
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| 156 | c for liquid water clouds: |
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| 157 | IF (ok_aie) THEN |
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| 158 | ! Formula "D" of Boucher and Lohmann, Tellus, 1995 |
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| 159 | ! |
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| 160 | cdnc(i,k) = 10.**(bl95_b0+bl95_b1* |
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| 161 | . log(MAX(sulfate(i,k),1.e-4))/log(10.))*1.e6 !-m-3 |
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| 162 | ! Cloud droplet number concentration (CDNC) is restricted |
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| 163 | ! to be within [20, 1000 cm^3] |
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| 164 | ! |
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| 165 | cdnc(i,k)=MIN(1000.e6,MAX(20.e6,cdnc(i,k))) |
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| 166 | ! |
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| 167 | ! |
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| 168 | cdnc_pi(i,k) = 10.**(bl95_b0+bl95_b1* |
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| 169 | . log(MAX(sulfate_pi(i,k),1.e-4))/log(10.))*1.e6 !-m-3 |
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| 170 | cdnc_pi(i,k)=MIN(1000.e6,MAX(20.e6,cdnc_pi(i,k))) |
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| 171 | ! |
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| 172 | ! |
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| 173 | ! air density: pplay(i,k) / (RD * zT(i,k)) |
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| 174 | ! factor 1.1: derive effective radius from volume-mean radius |
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| 175 | ! factor 1000 is the water density |
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| 176 | ! _chaud means that this is the CDR for liquid water clouds |
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| 177 | ! |
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| 178 | rad_chaud = |
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| 179 | . 1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) ) |
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| 180 | . / (4./3. * RPI * 1000. * cdnc(i,k)) )**(1./3.) |
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| 181 | ! |
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| 182 | ! Convert to um. CDR shall be at least 3 um. |
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| 183 | ! |
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| 184 | c rad_chaud = MAX(rad_chaud*1.e6, 3.) |
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| 185 | rad_chaud = MAX(rad_chaud*1.e6, 5.) |
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| 186 | |
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| 187 | ! Pre-industrial cloud opt thickness |
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| 188 | ! |
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| 189 | ! "radius" is calculated as rad_chaud above (plus the |
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| 190 | ! ice cloud contribution) but using cdnc_pi instead of |
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| 191 | ! cdnc. |
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| 192 | radius = |
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| 193 | . 1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) ) |
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| 194 | . / (4./3. * RPI * 1000. * cdnc_pi(i,k)) )**(1./3.) |
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| 195 | radius = MAX(radius*1.e6, 3.) |
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| 196 | |
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| 197 | tc = t(i,k)-273.15 |
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| 198 | rei = 0.71*tc + 61.29 |
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| 199 | if (tc.le.-81.4) rei = 3.5 |
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| 200 | if (zflwp(i).eq.0.) radius = 1. |
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| 201 | if (zfiwp(i).eq.0. .or. rei.le.0.) rei = 1. |
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| 202 | cldtaupi(i,k) = 3.0/2.0 * zflwp(i) / radius |
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| 203 | . + zfiwp(i) * (3.448e-03 + 2.431/rei) |
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| 204 | ENDIF ! ok_aie |
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| 205 | ! For output diagnostics |
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| 206 | ! |
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| 207 | ! Cloud droplet effective radius [um] |
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| 208 | ! |
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| 209 | ! we multiply here with f * xl (fraction of liquid water |
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| 210 | ! clouds in the grid cell) to avoid problems in the |
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| 211 | ! averaging of the output. |
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| 212 | ! In the output of IOIPSL, derive the real cloud droplet |
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| 213 | ! effective radius as re/fl |
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| 214 | ! |
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| 215 | fl(i,k) = pclc(i,k)*(1.-zfice) |
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| 216 | re(i,k) = rad_chaud*fl(i,k) |
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| 217 | |
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| 218 | c-jq end |
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| 219 | |
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| 220 | rel = rad_chaud |
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| 221 | c for ice clouds: as a function of the ambiant temperature |
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| 222 | c [formula used by Iacobellis and Somerville (2000), with an |
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| 223 | c asymptotical value of 3.5 microns at T<-81.4 C added to be |
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| 224 | c consistent with observations of Heymsfield et al. 1986]: |
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| 225 | tc = t(i,k)-273.15 |
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| 226 | rei = 0.71*tc + 61.29 |
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| 227 | if (tc.le.-81.4) rei = 3.5 |
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| 228 | |
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| 229 | c -- cloud optical thickness : |
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| 230 | |
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| 231 | c [for liquid clouds, traditional formula, |
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| 232 | c for ice clouds, Ebert & Curry (1992)] |
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| 233 | |
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| 234 | if (zflwp(i).eq.0.) rel = 1. |
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| 235 | if (zfiwp(i).eq.0. .or. rei.le.0.) rei = 1. |
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| 236 | pcltau(i,k) = 3.0/2.0 * ( zflwp(i)/rel ) |
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| 237 | . + zfiwp(i) * (3.448e-03 + 2.431/rei) |
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| 238 | |
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| 239 | c -- cloud infrared emissivity: |
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| 240 | |
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| 241 | c [the broadband infrared absorption coefficient is parameterized |
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| 242 | c as a function of the effective cld droplet radius] |
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| 243 | |
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| 244 | c Ebert and Curry (1992) formula as used by Kiehl & Zender (1995): |
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| 245 | k_ice = k_ice0 + 1.0/rei |
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| 246 | |
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| 247 | pclemi(i,k) = 1.0 |
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| 248 | . - EXP( - coef_chau*zflwp(i) - DF*k_ice*zfiwp(i) ) |
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| 249 | |
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| 250 | endif ! ok_newmicro |
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| 251 | |
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| 252 | lo = (pclc(i,k) .LE. seuil_neb) |
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| 253 | IF (lo) pclc(i,k) = 0.0 |
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| 254 | IF (lo) pcltau(i,k) = 0.0 |
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| 255 | IF (lo) pclemi(i,k) = 0.0 |
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| 256 | |
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| 257 | IF (lo) cldtaupi(i,k) = 0.0 |
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| 258 | IF (.NOT.ok_aie) cldtaupi(i,k)=pcltau(i,k) |
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| 259 | ENDDO |
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| 260 | ENDDO |
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| 261 | ccc DO k = 1, klev |
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| 262 | ccc DO i = 1, klon |
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| 263 | ccc t(i,k) = t(i,k) |
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| 264 | ccc pclc(i,k) = MAX( 1.e-5 , pclc(i,k) ) |
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| 265 | ccc lo = pclc(i,k) .GT. (2.*1.e-5) |
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| 266 | ccc zflwp = pqlwp(i,k)*1000.*(paprs(i,k)-paprs(i,k+1)) |
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| 267 | ccc . /(rg*pclc(i,k)) |
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| 268 | ccc zradef = 10.0 + (1.-sigs(k))*45.0 |
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| 269 | ccc pcltau(i,k) = 1.5 * zflwp / zradef |
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| 270 | ccc zfice=1.0-MIN(MAX((t(i,k)-263.)/(273.-263.),0.0),1.0) |
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| 271 | ccc zmsac = 0.13*(1.0-zfice) + 0.08*zfice |
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| 272 | ccc pclemi(i,k) = 1.-EXP(-zmsac*zflwp) |
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| 273 | ccc if (.NOT.lo) pclc(i,k) = 0.0 |
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| 274 | ccc if (.NOT.lo) pcltau(i,k) = 0.0 |
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| 275 | ccc if (.NOT.lo) pclemi(i,k) = 0.0 |
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| 276 | ccc ENDDO |
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| 277 | ccc ENDDO |
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| 278 | cccccc print*, 'pas de nuage dans le rayonnement' |
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| 279 | cccccc DO k = 1, klev |
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| 280 | cccccc DO i = 1, klon |
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| 281 | cccccc pclc(i,k) = 0.0 |
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| 282 | cccccc pcltau(i,k) = 0.0 |
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| 283 | cccccc pclemi(i,k) = 0.0 |
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| 284 | cccccc ENDDO |
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| 285 | cccccc ENDDO |
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| 286 | C |
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| 287 | C COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS |
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| 288 | C |
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| 289 | DO i = 1, klon |
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| 290 | pct(i)=1.0 |
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| 291 | pch(i)=1.0 |
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| 292 | pcm(i) = 1.0 |
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| 293 | pcl(i) = 1.0 |
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| 294 | pctlwp(i) = 0.0 |
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| 295 | ENDDO |
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| 296 | C |
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| 297 | DO k = klev, 1, -1 |
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| 298 | DO i = 1, klon |
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| 299 | pctlwp(i) = pctlwp(i) |
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| 300 | . + pqlwp(i,k)*(paprs(i,k)-paprs(i,k+1))/RG |
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| 301 | pct(i) = pct(i)*(1.0-pclc(i,k)) |
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| 302 | if (pplay(i,k).LE.cetahb*paprs(i,1)) |
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| 303 | . pch(i) = pch(i)*(1.0-pclc(i,k)) |
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| 304 | if (pplay(i,k).GT.cetahb*paprs(i,1) .AND. |
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| 305 | . pplay(i,k).LE.cetamb*paprs(i,1)) |
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| 306 | . pcm(i) = pcm(i)*(1.0-pclc(i,k)) |
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| 307 | if (pplay(i,k).GT.cetamb*paprs(i,1)) |
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| 308 | . pcl(i) = pcl(i)*(1.0-pclc(i,k)) |
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| 309 | ENDDO |
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| 310 | ENDDO |
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| 311 | C |
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| 312 | DO i = 1, klon |
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| 313 | pct(i)=1.-pct(i) |
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| 314 | pch(i)=1.-pch(i) |
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| 315 | pcm(i)=1.-pcm(i) |
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| 316 | pcl(i)=1.-pcl(i) |
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| 317 | ENDDO |
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| 318 | C |
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| 319 | RETURN |
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| 320 | END |
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