| 1 | ! |
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| 2 | ! $Header$ |
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| 3 | ! |
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| 4 | SUBROUTINE nuage (paprs, pplay, |
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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 | e ok_aie, |
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| 8 | e sulfate, sulfate_pi, |
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| 9 | e bl95_b0, bl95_b1, |
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| 10 | s cldtaupi, re, fl) |
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| 11 | IMPLICIT none |
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| 12 | c====================================================================== |
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| 13 | c Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910 |
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| 14 | c Objet: Calculer epaisseur optique et emmissivite des nuages |
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| 15 | c====================================================================== |
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| 16 | c Arguments: |
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| 17 | c t-------input-R-temperature |
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| 18 | c pqlwp---input-R-eau liquide nuageuse dans l'atmosphere (kg/kg) |
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| 19 | c pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1) |
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| 20 | c ok_aie--input-L-apply aerosol indirect effect or not |
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| 21 | c sulfate-input-R-sulfate aerosol mass concentration [um/m^3] |
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| 22 | c sulfate_pi-input-R-dito, pre-industrial value |
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| 23 | c bl95_b0-input-R-a parameter, may be varied for tests (s-sea, l-land) |
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| 24 | c bl95_b1-input-R-a parameter, may be varied for tests ( -"- ) |
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| 25 | c |
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| 26 | c cldtaupi-output-R-pre-industrial value of cloud optical thickness, |
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| 27 | c needed for the diagnostics of the aerosol indirect |
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| 28 | c radiative forcing (see radlwsw) |
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| 29 | c re------output-R-Cloud droplet effective radius multiplied by fl [um] |
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| 30 | c fl------output-R-Denominator to re, introduced to avoid problems in |
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| 31 | c the averaging of the output. fl is the fraction of liquid |
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| 32 | c water clouds within a grid cell |
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| 33 | c |
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| 34 | c pcltau--output-R-epaisseur optique des nuages |
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| 35 | c pclemi--output-R-emissivite des nuages (0 a 1) |
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| 36 | c====================================================================== |
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| 37 | C |
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| 38 | #include "YOMCST.h" |
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| 39 | c |
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| 40 | #include "dimensions.h" |
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| 41 | #include "dimphy.h" |
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| 42 | REAL paprs(klon,klev+1), pplay(klon,klev) |
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| 43 | REAL t(klon,klev) |
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| 44 | c |
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| 45 | REAL pclc(klon,klev) |
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| 46 | REAL pqlwp(klon,klev) |
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| 47 | REAL pcltau(klon,klev), pclemi(klon,klev) |
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| 48 | c |
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| 49 | REAL pct(klon), pctlwp(klon), pch(klon), pcl(klon), pcm(klon) |
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| 50 | c |
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| 51 | LOGICAL lo |
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| 52 | c |
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| 53 | REAL cetahb, cetamb |
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| 54 | PARAMETER (cetahb = 0.45, cetamb = 0.80) |
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| 55 | C |
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| 56 | INTEGER i, k |
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| 57 | REAL zflwp, zradef, zfice, zmsac |
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| 58 | c |
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| 59 | REAL radius, rad_froid, rad_chaud, rad_chau1, rad_chau2 |
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| 60 | PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0) |
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| 61 | ccc PARAMETER (rad_chaud=15.0, rad_froid=35.0) |
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| 62 | c sintex initial PARAMETER (rad_chaud=10.0, rad_froid=30.0) |
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| 63 | REAL coef, coef_froi, coef_chau |
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| 64 | PARAMETER (coef_chau=0.13, coef_froi=0.09) |
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| 65 | REAL seuil_neb, t_glace |
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| 66 | PARAMETER (seuil_neb=0.001, t_glace=273.0-15.0) |
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| 67 | INTEGER nexpo ! exponentiel pour glace/eau |
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| 68 | PARAMETER (nexpo=6) |
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| 69 | |
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| 70 | cjq for the aerosol indirect effect |
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| 71 | cjq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003 |
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| 72 | cjq |
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| 73 | LOGICAL ok_aie ! Apply AIE or not? |
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| 74 | |
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| 75 | REAL sulfate(klon, klev) ! sulfate aerosol mass concentration [ug m-3] |
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| 76 | REAL cdnc(klon, klev) ! cloud droplet number concentration [m-3] |
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| 77 | REAL re(klon, klev) ! cloud droplet effective radius [um] |
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| 78 | REAL sulfate_pi(klon, klev) ! sulfate aerosol mass concentration [ug m-3] (pre-industrial value) |
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| 79 | REAL cdnc_pi(klon, klev) ! cloud droplet number concentration [m-3] (pi value) |
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| 80 | REAL re_pi(klon, klev) ! cloud droplet effective radius [um] (pi value) |
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| 81 | |
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| 82 | REAL fl(klon, klev) ! xliq * rneb (denominator to re; fraction of liquid water clouds within the grid cell) |
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| 83 | |
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| 84 | REAL bl95_b0, bl95_b1 ! Parameter in B&L 95-Formula |
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| 85 | |
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| 86 | REAL cldtaupi(klon, klev) ! pre-industrial cloud opt thickness for diag |
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| 87 | cjq-end |
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| 88 | |
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| 89 | ccc PARAMETER (nexpo=1) |
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| 90 | c |
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| 91 | c Calculer l'epaisseur optique et l'emmissivite des nuages |
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| 92 | c |
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| 93 | DO k = 1, klev |
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| 94 | DO i = 1, klon |
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| 95 | rad_chaud = rad_chau1 |
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| 96 | IF (k.LE.3) rad_chaud = rad_chau2 |
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| 97 | |
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| 98 | pclc(i,k) = MAX(pclc(i,k), seuil_neb) |
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| 99 | zflwp = 1000.*pqlwp(i,k)/RG/pclc(i,k) |
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| 100 | . *(paprs(i,k)-paprs(i,k+1)) |
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| 101 | zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace) |
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| 102 | zfice = MIN(MAX(zfice,0.0),1.0) |
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| 103 | zfice = zfice**nexpo |
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| 104 | |
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| 105 | IF (ok_aie) THEN |
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| 106 | ! Formula "D" of Boucher and Lohmann, Tellus, 1995 |
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| 107 | ! |
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| 108 | cdnc(i,k) = 10.**(bl95_b0+bl95_b1* |
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| 109 | . log(MAX(sulfate(i,k),1.e-4))/log(10.))*1.e6 !-m-3 |
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| 110 | ! Cloud droplet number concentration (CDNC) is restricted |
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| 111 | ! to be within [20, 1000 cm^3] |
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| 112 | ! |
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| 113 | cdnc(i,k)=MIN(1000.e6,MAX(20.e6,cdnc(i,k))) |
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| 114 | cdnc_pi(i,k) = 10.**(bl95_b0+bl95_b1* |
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| 115 | . log(MAX(sulfate_pi(i,k),1.e-4))/log(10.))*1.e6 !-m-3 |
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| 116 | cdnc_pi(i,k)=MIN(1000.e6,MAX(20.e6,cdnc_pi(i,k))) |
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| 117 | ! |
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| 118 | ! |
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| 119 | ! air density: pplay(i,k) / (RD * zT(i,k)) |
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| 120 | ! factor 1.1: derive effective radius from volume-mean radius |
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| 121 | ! factor 1000 is the water density |
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| 122 | ! _chaud means that this is the CDR for liquid water clouds |
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| 123 | ! |
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| 124 | rad_chaud = |
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| 125 | . 1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) ) |
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| 126 | . / (4./3. * RPI * 1000. * cdnc(i,k)) )**(1./3.) |
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| 127 | ! |
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| 128 | ! Convert to um. CDR shall be at least 3 um. |
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| 129 | ! |
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| 130 | rad_chaud = MAX(rad_chaud*1.e6, 3.) |
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| 131 | |
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| 132 | ! For output diagnostics |
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| 133 | ! |
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| 134 | ! Cloud droplet effective radius [um] |
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| 135 | ! |
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| 136 | ! we multiply here with f * xl (fraction of liquid water |
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| 137 | ! clouds in the grid cell) to avoid problems in the |
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| 138 | ! averaging of the output. |
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| 139 | ! In the output of IOIPSL, derive the real cloud droplet |
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| 140 | ! effective radius as re/fl |
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| 141 | ! |
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| 142 | fl(i,k) = pclc(i,k)*(1.-zfice) |
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| 143 | re(i,k) = rad_chaud*fl(i,k) |
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| 144 | |
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| 145 | ! Pre-industrial cloud opt thickness |
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| 146 | ! |
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| 147 | ! "radius" is calculated as rad_chaud above (plus the |
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| 148 | ! ice cloud contribution) but using cdnc_pi instead of |
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| 149 | ! cdnc. |
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| 150 | radius = MAX(1.1e6 * ( (pqlwp(i,k)*pplay(i,k)/(RD*T(i,k))) |
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| 151 | . / (4./3.*RPI*1000.*cdnc_pi(i,k)) )**(1./3.), |
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| 152 | . 3.) * (1.-zfice) + rad_froid * zfice |
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| 153 | cldtaupi(i,k) = 3.0/2.0 * zflwp / radius |
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| 154 | . |
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| 155 | ENDIF ! ok_aie |
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| 156 | |
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| 157 | radius = rad_chaud * (1.-zfice) + rad_froid * zfice |
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| 158 | coef = coef_chau * (1.-zfice) + coef_froi * zfice |
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| 159 | pcltau(i,k) = 3.0/2.0 * zflwp / radius |
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| 160 | pclemi(i,k) = 1.0 - EXP( - coef * zflwp) |
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| 161 | lo = (pclc(i,k) .LE. seuil_neb) |
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| 162 | IF (lo) pclc(i,k) = 0.0 |
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| 163 | IF (lo) pcltau(i,k) = 0.0 |
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| 164 | IF (lo) pclemi(i,k) = 0.0 |
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| 165 | |
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| 166 | IF (.NOT.ok_aie) cldtaupi(i,k)=pcltau(i,k) |
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| 167 | ENDDO |
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| 168 | ENDDO |
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| 169 | ccc DO k = 1, klev |
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| 170 | ccc DO i = 1, klon |
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| 171 | ccc t(i,k) = t(i,k) |
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| 172 | ccc pclc(i,k) = MAX( 1.e-5 , pclc(i,k) ) |
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| 173 | ccc lo = pclc(i,k) .GT. (2.*1.e-5) |
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| 174 | ccc zflwp = pqlwp(i,k)*1000.*(paprs(i,k)-paprs(i,k+1)) |
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| 175 | ccc . /(rg*pclc(i,k)) |
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| 176 | ccc zradef = 10.0 + (1.-sigs(k))*45.0 |
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| 177 | ccc pcltau(i,k) = 1.5 * zflwp / zradef |
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| 178 | ccc zfice=1.0-MIN(MAX((t(i,k)-263.)/(273.-263.),0.0),1.0) |
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| 179 | ccc zmsac = 0.13*(1.0-zfice) + 0.08*zfice |
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| 180 | ccc pclemi(i,k) = 1.-EXP(-zmsac*zflwp) |
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| 181 | ccc if (.NOT.lo) pclc(i,k) = 0.0 |
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| 182 | ccc if (.NOT.lo) pcltau(i,k) = 0.0 |
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| 183 | ccc if (.NOT.lo) pclemi(i,k) = 0.0 |
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| 184 | ccc ENDDO |
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| 185 | ccc ENDDO |
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| 186 | cccccc print*, 'pas de nuage dans le rayonnement' |
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| 187 | cccccc DO k = 1, klev |
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| 188 | cccccc DO i = 1, klon |
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| 189 | cccccc pclc(i,k) = 0.0 |
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| 190 | cccccc pcltau(i,k) = 0.0 |
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| 191 | cccccc pclemi(i,k) = 0.0 |
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| 192 | cccccc ENDDO |
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| 193 | cccccc ENDDO |
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| 194 | C |
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| 195 | C COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS |
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| 196 | C |
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| 197 | DO i = 1, klon |
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| 198 | pct(i)=1.0 |
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| 199 | pch(i)=1.0 |
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| 200 | pcm(i) = 1.0 |
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| 201 | pcl(i) = 1.0 |
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| 202 | pctlwp(i) = 0.0 |
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| 203 | ENDDO |
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| 204 | C |
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| 205 | DO k = klev, 1, -1 |
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| 206 | DO i = 1, klon |
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| 207 | pctlwp(i) = pctlwp(i) |
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| 208 | . + pqlwp(i,k)*(paprs(i,k)-paprs(i,k+1))/RG |
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| 209 | pct(i) = pct(i)*(1.0-pclc(i,k)) |
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| 210 | if (pplay(i,k).LE.cetahb*paprs(i,1)) |
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| 211 | . pch(i) = pch(i)*(1.0-pclc(i,k)) |
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| 212 | if (pplay(i,k).GT.cetahb*paprs(i,1) .AND. |
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| 213 | . pplay(i,k).LE.cetamb*paprs(i,1)) |
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| 214 | . pcm(i) = pcm(i)*(1.0-pclc(i,k)) |
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| 215 | if (pplay(i,k).GT.cetamb*paprs(i,1)) |
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| 216 | . pcl(i) = pcl(i)*(1.0-pclc(i,k)) |
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| 217 | ENDDO |
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| 218 | ENDDO |
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| 219 | C |
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| 220 | DO i = 1, klon |
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| 221 | pct(i)=1.-pct(i) |
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| 222 | pch(i)=1.-pch(i) |
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| 223 | pcm(i)=1.-pcm(i) |
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| 224 | pcl(i)=1.-pcl(i) |
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| 225 | ENDDO |
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| 226 | C |
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| 227 | RETURN |
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| 228 | END |
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| 229 | SUBROUTINE diagcld1(paprs,pplay,rain,snow,kbot,ktop, |
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| 230 | . diafra,dialiq) |
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| 231 | IMPLICIT none |
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| 232 | c |
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| 233 | c Laurent Li (LMD/CNRS), le 12 octobre 1998 |
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| 234 | c (adaptation du code ECMWF) |
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| 235 | c |
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| 236 | c Dans certains cas, le schema pronostique des nuages n'est |
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| 237 | c pas suffisament performant. On a donc besoin de diagnostiquer |
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| 238 | c ces nuages. Je dois avouer que c'est une frustration. |
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| 239 | c |
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| 240 | #include "dimensions.h" |
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| 241 | #include "dimphy.h" |
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| 242 | #include "YOMCST.h" |
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| 243 | c |
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| 244 | c Arguments d'entree: |
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| 245 | REAL paprs(klon,klev+1) ! pression (Pa) a inter-couche |
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| 246 | REAL pplay(klon,klev) ! pression (Pa) au milieu de couche |
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| 247 | REAL t(klon,klev) ! temperature (K) |
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| 248 | REAL q(klon,klev) ! humidite specifique (Kg/Kg) |
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| 249 | REAL rain(klon) ! pluie convective (kg/m2/s) |
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| 250 | REAL snow(klon) ! neige convective (kg/m2/s) |
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| 251 | INTEGER ktop(klon) ! sommet de la convection |
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| 252 | INTEGER kbot(klon) ! bas de la convection |
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| 253 | c |
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| 254 | c Arguments de sortie: |
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| 255 | REAL diafra(klon,klev) ! fraction nuageuse diagnostiquee |
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| 256 | REAL dialiq(klon,klev) ! eau liquide nuageuse |
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| 257 | c |
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| 258 | c Constantes ajustables: |
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| 259 | REAL CANVA, CANVB, CANVH |
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| 260 | PARAMETER (CANVA=2.0, CANVB=0.3, CANVH=0.4) |
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| 261 | REAL CCA, CCB, CCC |
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| 262 | PARAMETER (CCA=0.125, CCB=1.5, CCC=0.8) |
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| 263 | REAL CCFCT, CCSCAL |
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| 264 | PARAMETER (CCFCT=0.400) |
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| 265 | PARAMETER (CCSCAL=1.0E+11) |
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| 266 | REAL CETAHB, CETAMB |
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| 267 | PARAMETER (CETAHB=0.45, CETAMB=0.80) |
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| 268 | REAL CCLWMR |
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| 269 | PARAMETER (CCLWMR=1.E-04) |
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| 270 | REAL ZEPSCR |
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| 271 | PARAMETER (ZEPSCR=1.0E-10) |
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| 272 | c |
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| 273 | c Variables locales: |
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| 274 | INTEGER i, k |
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| 275 | REAL zcc(klon) |
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| 276 | c |
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| 277 | c Initialisation: |
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| 278 | c |
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| 279 | DO k = 1, klev |
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| 280 | DO i = 1, klon |
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| 281 | diafra(i,k) = 0.0 |
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| 282 | dialiq(i,k) = 0.0 |
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| 283 | ENDDO |
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| 284 | ENDDO |
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| 285 | c |
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| 286 | DO i = 1, klon ! Calculer la fraction nuageuse |
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| 287 | zcc(i) = 0.0 |
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| 288 | IF((rain(i)+snow(i)).GT.0.) THEN |
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| 289 | zcc(i)= CCA * LOG(MAX(ZEPSCR,(rain(i)+snow(i))*CCSCAL))-CCB |
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| 290 | zcc(i)= MIN(CCC,MAX(0.0,zcc(i))) |
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| 291 | ENDIF |
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| 292 | ENDDO |
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| 293 | c |
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| 294 | DO i = 1, klon ! pour traiter les enclumes |
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| 295 | diafra(i,ktop(i)) = MAX(diafra(i,ktop(i)),zcc(i)*CCFCT) |
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| 296 | IF ((zcc(i).GE.CANVH) .AND. |
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| 297 | . (pplay(i,ktop(i)).LE.CETAHB*paprs(i,1))) |
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| 298 | . diafra(i,ktop(i)) = MAX(diafra(i,ktop(i)), |
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| 299 | . MAX(zcc(i)*CCFCT,CANVA*(zcc(i)-CANVB))) |
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| 300 | dialiq(i,ktop(i))=CCLWMR*diafra(i,ktop(i)) |
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| 301 | ENDDO |
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| 302 | c |
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| 303 | DO k = 1, klev ! nuages convectifs (sauf enclumes) |
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| 304 | DO i = 1, klon |
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| 305 | IF (k.LT.ktop(i) .AND. k.GE.kbot(i)) THEN |
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| 306 | diafra(i,k)=MAX(diafra(i,k),zcc(i)*CCFCT) |
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| 307 | dialiq(i,k)=CCLWMR*diafra(i,k) |
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| 308 | ENDIF |
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| 309 | ENDDO |
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| 310 | ENDDO |
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| 311 | c |
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| 312 | RETURN |
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| 313 | END |
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| 314 | SUBROUTINE diagcld2(paprs,pplay,t,q, diafra,dialiq) |
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| 315 | IMPLICIT none |
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| 316 | c |
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| 317 | #include "dimensions.h" |
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| 318 | #include "dimphy.h" |
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| 319 | #include "YOMCST.h" |
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| 320 | c |
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| 321 | c Arguments d'entree: |
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| 322 | REAL paprs(klon,klev+1) ! pression (Pa) a inter-couche |
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| 323 | REAL pplay(klon,klev) ! pression (Pa) au milieu de couche |
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| 324 | REAL t(klon,klev) ! temperature (K) |
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| 325 | REAL q(klon,klev) ! humidite specifique (Kg/Kg) |
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| 326 | c |
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| 327 | c Arguments de sortie: |
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| 328 | REAL diafra(klon,klev) ! fraction nuageuse diagnostiquee |
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| 329 | REAL dialiq(klon,klev) ! eau liquide nuageuse |
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| 330 | c |
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| 331 | REAL CETAMB |
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| 332 | PARAMETER (CETAMB=0.80) |
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| 333 | REAL CLOIA, CLOIB, CLOIC, CLOID |
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| 334 | PARAMETER (CLOIA=1.0E+02, CLOIB=-10.00, CLOIC=-0.6, CLOID=5.0) |
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| 335 | ccc PARAMETER (CLOIA=1.0E+02, CLOIB=-10.00, CLOIC=-0.9, CLOID=5.0) |
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| 336 | REAL RGAMMAS |
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| 337 | PARAMETER (RGAMMAS=0.05) |
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| 338 | REAL CRHL |
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| 339 | PARAMETER (CRHL=0.15) |
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| 340 | ccc PARAMETER (CRHL=0.70) |
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| 341 | REAL t_coup |
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| 342 | PARAMETER (t_coup=234.0) |
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| 343 | c |
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| 344 | c Variables locales: |
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| 345 | INTEGER i, k, kb, invb(klon) |
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| 346 | REAL zqs, zrhb, zcll, zdthmin(klon), zdthdp |
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| 347 | REAL zdelta, zcor |
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| 348 | c |
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| 349 | c Fonctions thermodynamiques: |
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| 350 | #include "YOETHF.h" |
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| 351 | #include "FCTTRE.h" |
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| 352 | c |
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| 353 | c Initialisation: |
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| 354 | c |
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| 355 | DO k = 1, klev |
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| 356 | DO i = 1, klon |
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| 357 | diafra(i,k) = 0.0 |
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| 358 | dialiq(i,k) = 0.0 |
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| 359 | ENDDO |
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| 360 | ENDDO |
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| 361 | c |
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| 362 | DO i = 1, klon |
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| 363 | invb(i) = klev |
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| 364 | zdthmin(i)=0.0 |
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| 365 | ENDDO |
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| 366 | |
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| 367 | DO k = 2, klev/2-1 |
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| 368 | DO i = 1, klon |
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| 369 | zdthdp = (t(i,k)-t(i,k+1))/(pplay(i,k)-pplay(i,k+1)) |
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| 370 | . - RD * 0.5*(t(i,k)+t(i,k+1))/RCPD/paprs(i,k+1) |
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| 371 | zdthdp = zdthdp * CLOIA |
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| 372 | IF (pplay(i,k).GT.CETAMB*paprs(i,1) .AND. |
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| 373 | . zdthdp.LT.zdthmin(i) ) THEN |
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| 374 | zdthmin(i) = zdthdp |
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| 375 | invb(i) = k |
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| 376 | ENDIF |
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| 377 | ENDDO |
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| 378 | ENDDO |
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| 379 | |
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| 380 | DO i = 1, klon |
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| 381 | kb=invb(i) |
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| 382 | IF (thermcep) THEN |
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| 383 | zdelta=MAX(0.,SIGN(1.,RTT-t(i,kb))) |
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| 384 | zqs= R2ES*FOEEW(t(i,kb),zdelta)/pplay(i,kb) |
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| 385 | zqs=MIN(0.5,zqs) |
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| 386 | zcor=1./(1.-RETV*zqs) |
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| 387 | zqs=zqs*zcor |
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| 388 | ELSE |
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| 389 | IF (t(i,kb) .LT. t_coup) THEN |
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| 390 | zqs = qsats(t(i,kb)) / pplay(i,kb) |
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| 391 | ELSE |
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| 392 | zqs = qsatl(t(i,kb)) / pplay(i,kb) |
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| 393 | ENDIF |
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| 394 | ENDIF |
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| 395 | zcll = CLOIB * zdthmin(i) + CLOIC |
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| 396 | zcll = MIN(1.0,MAX(0.0,zcll)) |
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| 397 | zrhb= q(i,kb)/zqs |
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| 398 | IF (zcll.GT.0.0.AND.zrhb.LT.CRHL) |
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| 399 | . zcll=zcll*(1.-(CRHL-zrhb)*CLOID) |
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| 400 | zcll=MIN(1.0,MAX(0.0,zcll)) |
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| 401 | diafra(i,kb) = MAX(diafra(i,kb),zcll) |
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| 402 | dialiq(i,kb)= diafra(i,kb) * RGAMMAS*zqs |
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| 403 | ENDDO |
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| 404 | c |
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| 405 | RETURN |
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| 406 | END |
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