| [3331] | 1 | ! $Id: nuage.F90 2346 2015-08-21 15:13:46Z emillour $ |
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| 2 | |
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| 3 | SUBROUTINE nuage(paprs, pplay, t, pqlwp, pclc, pcltau, pclemi, pch, pcl, pcm, & |
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| 4 | pct, pctlwp, ok_aie, mass_solu_aero, mass_solu_aero_pi, bl95_b0, bl95_b1, & |
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| 5 | cldtaupi, re, fl) |
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| 6 | USE dimphy |
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| 7 | USE icefrac_lsc_mod ! computes ice fraction (JBM 3/14) |
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| 8 | IMPLICIT NONE |
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| 9 | ! ====================================================================== |
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| 10 | ! Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910 |
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| 11 | ! Objet: Calculer epaisseur optique et emmissivite des nuages |
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| 12 | ! ====================================================================== |
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| 13 | ! Arguments: |
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| 14 | ! t-------input-R-temperature |
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| 15 | ! pqlwp---input-R-eau liquide nuageuse dans l'atmosphere (kg/kg) |
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| 16 | ! pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1) |
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| 17 | ! ok_aie--input-L-apply aerosol indirect effect or not |
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| 18 | ! mass_solu_aero-----input-R-total mass concentration for all soluble |
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| 19 | ! aerosols[ug/m^3] |
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| 20 | ! mass_solu_aero_pi--input-R-dito, pre-industrial value |
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| 21 | ! bl95_b0-input-R-a parameter, may be varied for tests (s-sea, l-land) |
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| 22 | ! bl95_b1-input-R-a parameter, may be varied for tests ( -"- ) |
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| 23 | |
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| 24 | ! cldtaupi-output-R-pre-industrial value of cloud optical thickness, |
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| 25 | ! needed for the diagnostics of the aerosol indirect |
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| 26 | ! radiative forcing (see radlwsw) |
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| 27 | ! re------output-R-Cloud droplet effective radius multiplied by fl [um] |
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| 28 | ! fl------output-R-Denominator to re, introduced to avoid problems in |
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| 29 | ! the averaging of the output. fl is the fraction of liquid |
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| 30 | ! water clouds within a grid cell |
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| 31 | |
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| 32 | ! pcltau--output-R-epaisseur optique des nuages |
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| 33 | ! pclemi--output-R-emissivite des nuages (0 a 1) |
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| 34 | ! ====================================================================== |
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| 35 | |
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| 36 | include "YOMCST.h" |
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| 37 | include "nuage.h" ! JBM 3/14 |
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| 38 | |
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| 39 | REAL paprs(klon, klev+1), pplay(klon, klev) |
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| 40 | REAL t(klon, klev) |
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| 41 | |
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| 42 | REAL pclc(klon, klev) |
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| 43 | REAL pqlwp(klon, klev) |
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| 44 | REAL pcltau(klon, klev), pclemi(klon, klev) |
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| 45 | |
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| 46 | REAL pct(klon), pctlwp(klon), pch(klon), pcl(klon), pcm(klon) |
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| 47 | |
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| 48 | LOGICAL lo |
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| 49 | |
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| 50 | REAL cetahb, cetamb |
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| 51 | PARAMETER (cetahb=0.45, cetamb=0.80) |
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| 52 | |
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| 53 | INTEGER i, k |
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| 54 | REAL zflwp, zradef, zfice(klon), zmsac |
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| 55 | |
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| 56 | REAL radius, rad_chaud |
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| 57 | ! JBM (3/14) parameters already defined in nuage.h: |
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| 58 | ! REAL rad_froid, rad_chau1, rad_chau2 |
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| 59 | ! PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0) |
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| 60 | ! cc PARAMETER (rad_chaud=15.0, rad_froid=35.0) |
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| 61 | ! sintex initial PARAMETER (rad_chaud=10.0, rad_froid=30.0) |
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| 62 | REAL coef, coef_froi, coef_chau |
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| 63 | PARAMETER (coef_chau=0.13, coef_froi=0.09) |
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| 64 | REAL seuil_neb |
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| 65 | PARAMETER (seuil_neb=0.001) |
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| 66 | ! JBM (3/14) nexpo is replaced by exposant_glace |
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| 67 | ! REAL nexpo ! exponentiel pour glace/eau |
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| 68 | ! PARAMETER (nexpo=6.) |
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| 69 | REAL, PARAMETER :: t_glace_min_old = 258. |
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| 70 | INTEGER, PARAMETER :: exposant_glace_old = 6 |
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| 71 | |
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| 72 | |
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| 73 | ! jq for the aerosol indirect effect |
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| 74 | ! jq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003 |
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| 75 | ! jq |
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| 76 | LOGICAL ok_aie ! Apply AIE or not? |
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| 77 | |
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| 78 | REAL mass_solu_aero(klon, klev) ! total mass concentration for all soluble aerosols[ug m-3] |
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| 79 | REAL mass_solu_aero_pi(klon, klev) ! - " - pre-industrial value |
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| 80 | REAL cdnc(klon, klev) ! cloud droplet number concentration [m-3] |
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| 81 | REAL re(klon, klev) ! cloud droplet effective radius [um] |
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| 82 | REAL cdnc_pi(klon, klev) ! cloud droplet number concentration [m-3] (pi value) |
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| 83 | REAL re_pi(klon, klev) ! cloud droplet effective radius [um] (pi value) |
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| 84 | |
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| 85 | REAL fl(klon, klev) ! xliq * rneb (denominator to re; fraction of liquid water clouds |
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| 86 | ! within the grid cell) |
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| 87 | |
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| 88 | REAL bl95_b0, bl95_b1 ! Parameter in B&L 95-Formula |
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| 89 | |
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| 90 | REAL cldtaupi(klon, klev) ! pre-industrial cloud opt thickness for diag |
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| 91 | ! jq-end |
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| 92 | |
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| 93 | ! cc PARAMETER (nexpo=1) |
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| 94 | |
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| 95 | ! Calculer l'epaisseur optique et l'emmissivite des nuages |
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| 96 | |
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| 97 | DO k = 1, klev |
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| 98 | IF (iflag_t_glace.EQ.0) THEN |
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| 99 | DO i = 1, klon |
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| 100 | zfice(i) = 1.0 - (t(i,k)-t_glace_min_old)/(273.13-t_glace_min_old) |
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| 101 | zfice(i) = min(max(zfice(i),0.0), 1.0) |
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| 102 | zfice(i) = zfice(i)**exposant_glace_old |
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| 103 | ENDDO |
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| 104 | ELSE ! of IF (iflag_t_glace.EQ.0) |
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| 105 | ! JBM: icefrac_lsc is now a function contained in icefrac_lsc_mod |
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| 106 | ! zfice(i) = icefrac_lsc(t(i,k), t_glace_min, & |
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| 107 | ! t_glace_max, exposant_glace) |
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| 108 | CALL icefrac_lsc(klon,t(:,k),pplay(:,k)/paprs(:,1),zfice(:)) |
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| 109 | ENDIF |
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| 110 | |
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| 111 | DO i = 1, klon |
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| 112 | rad_chaud = rad_chau1 |
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| 113 | IF (k<=3) rad_chaud = rad_chau2 |
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| 114 | |
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| 115 | pclc(i, k) = max(pclc(i,k), seuil_neb) |
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| 116 | zflwp = 1000.*pqlwp(i, k)/rg/pclc(i, k)*(paprs(i,k)-paprs(i,k+1)) |
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| 117 | |
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| 118 | IF (ok_aie) THEN |
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| 119 | ! Formula "D" of Boucher and Lohmann, Tellus, 1995 |
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| 120 | ! |
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| 121 | cdnc(i, k) = 10.**(bl95_b0+bl95_b1*log(max(mass_solu_aero(i,k), & |
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| 122 | 1.E-4))/log(10.))*1.E6 !-m-3 |
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| 123 | ! Cloud droplet number concentration (CDNC) is restricted |
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| 124 | ! to be within [20, 1000 cm^3] |
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| 125 | ! |
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| 126 | cdnc(i, k) = min(1000.E6, max(20.E6,cdnc(i,k))) |
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| 127 | cdnc_pi(i, k) = 10.**(bl95_b0+bl95_b1*log(max(mass_solu_aero_pi(i,k), & |
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| 128 | 1.E-4))/log(10.))*1.E6 !-m-3 |
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| 129 | cdnc_pi(i, k) = min(1000.E6, max(20.E6,cdnc_pi(i,k))) |
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| 130 | ! |
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| 131 | ! |
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| 132 | ! air density: pplay(i,k) / (RD * zT(i,k)) |
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| 133 | ! factor 1.1: derive effective radius from volume-mean radius |
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| 134 | ! factor 1000 is the water density |
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| 135 | ! _chaud means that this is the CDR for liquid water clouds |
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| 136 | ! |
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| 137 | rad_chaud = 1.1*((pqlwp(i,k)*pplay(i,k)/(rd*t(i,k)))/(4./3.*rpi*1000. & |
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| 138 | *cdnc(i,k)))**(1./3.) |
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| 139 | ! |
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| 140 | ! Convert to um. CDR shall be at least 3 um. |
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| 141 | ! |
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| 142 | rad_chaud = max(rad_chaud*1.E6, 3.) |
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| 143 | |
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| 144 | ! For output diagnostics |
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| 145 | ! |
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| 146 | ! Cloud droplet effective radius [um] |
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| 147 | ! |
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| 148 | ! we multiply here with f * xl (fraction of liquid water |
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| 149 | ! clouds in the grid cell) to avoid problems in the |
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| 150 | ! averaging of the output. |
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| 151 | ! In the output of IOIPSL, derive the real cloud droplet |
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| 152 | ! effective radius as re/fl |
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| 153 | ! |
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| 154 | fl(i, k) = pclc(i, k)*(1.-zfice(i)) |
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| 155 | re(i, k) = rad_chaud*fl(i, k) |
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| 156 | |
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| 157 | ! Pre-industrial cloud opt thickness |
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| 158 | ! |
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| 159 | ! "radius" is calculated as rad_chaud above (plus the |
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| 160 | ! ice cloud contribution) but using cdnc_pi instead of |
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| 161 | ! cdnc. |
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| 162 | radius = max(1.1E6*((pqlwp(i,k)*pplay(i,k)/(rd*t(i,k)))/(4./3.*rpi* & |
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| 163 | 1000.*cdnc_pi(i,k)))**(1./3.), 3.)*(1.-zfice(i)) + rad_froid*zfice(i) |
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| 164 | cldtaupi(i, k) = 3.0/2.0*zflwp/radius |
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| 165 | END IF ! ok_aie |
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| 166 | |
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| 167 | radius = rad_chaud*(1.-zfice(i)) + rad_froid*zfice(i) |
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| 168 | coef = coef_chau*(1.-zfice(i)) + coef_froi*zfice(i) |
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| 169 | pcltau(i, k) = 3.0/2.0*zflwp/radius |
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| 170 | pclemi(i, k) = 1.0 - exp(-coef*zflwp) |
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| 171 | lo = (pclc(i,k)<=seuil_neb) |
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| 172 | IF (lo) pclc(i, k) = 0.0 |
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| 173 | IF (lo) pcltau(i, k) = 0.0 |
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| 174 | IF (lo) pclemi(i, k) = 0.0 |
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| 175 | |
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| 176 | IF (.NOT. ok_aie) cldtaupi(i, k) = pcltau(i, k) |
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| 177 | END DO |
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| 178 | END DO |
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| 179 | ! cc DO k = 1, klev |
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| 180 | ! cc DO i = 1, klon |
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| 181 | ! cc t(i,k) = t(i,k) |
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| 182 | ! cc pclc(i,k) = MAX( 1.e-5 , pclc(i,k) ) |
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| 183 | ! cc lo = pclc(i,k) .GT. (2.*1.e-5) |
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| 184 | ! cc zflwp = pqlwp(i,k)*1000.*(paprs(i,k)-paprs(i,k+1)) |
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| 185 | ! cc . /(rg*pclc(i,k)) |
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| 186 | ! cc zradef = 10.0 + (1.-sigs(k))*45.0 |
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| 187 | ! cc pcltau(i,k) = 1.5 * zflwp / zradef |
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| 188 | ! cc zfice=1.0-MIN(MAX((t(i,k)-263.)/(273.-263.),0.0),1.0) |
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| 189 | ! cc zmsac = 0.13*(1.0-zfice) + 0.08*zfice |
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| 190 | ! cc pclemi(i,k) = 1.-EXP(-zmsac*zflwp) |
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| 191 | ! cc if (.NOT.lo) pclc(i,k) = 0.0 |
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| 192 | ! cc if (.NOT.lo) pcltau(i,k) = 0.0 |
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| 193 | ! cc if (.NOT.lo) pclemi(i,k) = 0.0 |
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| 194 | ! cc ENDDO |
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| 195 | ! cc ENDDO |
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| 196 | ! ccccc print*, 'pas de nuage dans le rayonnement' |
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| 197 | ! ccccc DO k = 1, klev |
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| 198 | ! ccccc DO i = 1, klon |
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| 199 | ! ccccc pclc(i,k) = 0.0 |
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| 200 | ! ccccc pcltau(i,k) = 0.0 |
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| 201 | ! ccccc pclemi(i,k) = 0.0 |
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| 202 | ! ccccc ENDDO |
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| 203 | ! ccccc ENDDO |
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| 204 | |
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| 205 | ! COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS |
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| 206 | |
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| 207 | DO i = 1, klon |
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| 208 | pct(i) = 1.0 |
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| 209 | pch(i) = 1.0 |
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| 210 | pcm(i) = 1.0 |
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| 211 | pcl(i) = 1.0 |
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| 212 | pctlwp(i) = 0.0 |
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| 213 | END DO |
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| 214 | |
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| 215 | DO k = klev, 1, -1 |
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| 216 | DO i = 1, klon |
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| 217 | pctlwp(i) = pctlwp(i) + pqlwp(i, k)*(paprs(i,k)-paprs(i,k+1))/rg |
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| 218 | pct(i) = pct(i)*(1.0-pclc(i,k)) |
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| 219 | IF (pplay(i,k)<=cetahb*paprs(i,1)) pch(i) = pch(i)*(1.0-pclc(i,k)) |
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| 220 | IF (pplay(i,k)>cetahb*paprs(i,1) .AND. pplay(i,k)<=cetamb*paprs(i,1)) & |
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| 221 | pcm(i) = pcm(i)*(1.0-pclc(i,k)) |
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| 222 | IF (pplay(i,k)>cetamb*paprs(i,1)) pcl(i) = pcl(i)*(1.0-pclc(i,k)) |
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| 223 | END DO |
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| 224 | END DO |
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| 225 | |
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| 226 | DO i = 1, klon |
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| 227 | pct(i) = 1. - pct(i) |
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| 228 | pch(i) = 1. - pch(i) |
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| 229 | pcm(i) = 1. - pcm(i) |
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| 230 | pcl(i) = 1. - pcl(i) |
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| 231 | END DO |
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| 232 | |
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| 233 | RETURN |
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| 234 | END SUBROUTINE nuage |
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| 235 | SUBROUTINE diagcld1(paprs, pplay, rain, snow, kbot, ktop, diafra, dialiq) |
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| 236 | USE dimphy |
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| 237 | IMPLICIT NONE |
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| 238 | |
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| 239 | ! Laurent Li (LMD/CNRS), le 12 octobre 1998 |
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| 240 | ! (adaptation du code ECMWF) |
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| 241 | |
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| 242 | ! Dans certains cas, le schema pronostique des nuages n'est |
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| 243 | ! pas suffisament performant. On a donc besoin de diagnostiquer |
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| 244 | ! ces nuages. Je dois avouer que c'est une frustration. |
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| 245 | |
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| 246 | include "YOMCST.h" |
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| 247 | |
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| 248 | ! Arguments d'entree: |
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| 249 | REAL paprs(klon, klev+1) ! pression (Pa) a inter-couche |
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| 250 | REAL pplay(klon, klev) ! pression (Pa) au milieu de couche |
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| 251 | REAL t(klon, klev) ! temperature (K) |
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| 252 | REAL q(klon, klev) ! humidite specifique (Kg/Kg) |
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| 253 | REAL rain(klon) ! pluie convective (kg/m2/s) |
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| 254 | REAL snow(klon) ! neige convective (kg/m2/s) |
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| 255 | INTEGER ktop(klon) ! sommet de la convection |
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| 256 | INTEGER kbot(klon) ! bas de la convection |
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| 257 | |
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| 258 | ! Arguments de sortie: |
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| 259 | REAL diafra(klon, klev) ! fraction nuageuse diagnostiquee |
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| 260 | REAL dialiq(klon, klev) ! eau liquide nuageuse |
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| 261 | |
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| 262 | ! Constantes ajustables: |
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| 263 | REAL canva, canvb, canvh |
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| 264 | PARAMETER (canva=2.0, canvb=0.3, canvh=0.4) |
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| 265 | REAL cca, ccb, ccc |
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| 266 | PARAMETER (cca=0.125, ccb=1.5, ccc=0.8) |
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| 267 | REAL ccfct, ccscal |
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| 268 | PARAMETER (ccfct=0.400) |
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| 269 | PARAMETER (ccscal=1.0E+11) |
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| 270 | REAL cetahb, cetamb |
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| 271 | PARAMETER (cetahb=0.45, cetamb=0.80) |
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| 272 | REAL cclwmr |
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| 273 | PARAMETER (cclwmr=1.E-04) |
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| 274 | REAL zepscr |
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| 275 | PARAMETER (zepscr=1.0E-10) |
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| 276 | |
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| 277 | ! Variables locales: |
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| 278 | INTEGER i, k |
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| 279 | REAL zcc(klon) |
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| 280 | |
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| 281 | ! Initialisation: |
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| 282 | |
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| 283 | DO k = 1, klev |
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| 284 | DO i = 1, klon |
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| 285 | diafra(i, k) = 0.0 |
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| 286 | dialiq(i, k) = 0.0 |
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| 287 | END DO |
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| 288 | END DO |
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| 289 | |
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| 290 | DO i = 1, klon ! Calculer la fraction nuageuse |
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| 291 | zcc(i) = 0.0 |
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| 292 | IF ((rain(i)+snow(i))>0.) THEN |
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| 293 | zcc(i) = cca*log(max(zepscr,(rain(i)+snow(i))*ccscal)) - ccb |
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| 294 | zcc(i) = min(ccc, max(0.0,zcc(i))) |
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| 295 | END IF |
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| 296 | END DO |
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| 297 | |
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| 298 | DO i = 1, klon ! pour traiter les enclumes |
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| 299 | diafra(i, ktop(i)) = max(diafra(i,ktop(i)), zcc(i)*ccfct) |
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| 300 | IF ((zcc(i)>=canvh) .AND. (pplay(i,ktop(i))<=cetahb*paprs(i, & |
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| 301 | 1))) diafra(i, ktop(i)) = max(diafra(i,ktop(i)), max(zcc( & |
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| 302 | i)*ccfct,canva*(zcc(i)-canvb))) |
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| 303 | dialiq(i, ktop(i)) = cclwmr*diafra(i, ktop(i)) |
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| 304 | END DO |
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| 305 | |
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| 306 | DO k = 1, klev ! nuages convectifs (sauf enclumes) |
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| 307 | DO i = 1, klon |
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| 308 | IF (k<ktop(i) .AND. k>=kbot(i)) THEN |
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| 309 | diafra(i, k) = max(diafra(i,k), zcc(i)*ccfct) |
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| 310 | dialiq(i, k) = cclwmr*diafra(i, k) |
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| 311 | END IF |
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| 312 | END DO |
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| 313 | END DO |
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| 314 | |
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| 315 | RETURN |
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| 316 | END SUBROUTINE diagcld1 |
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| 317 | SUBROUTINE diagcld2(paprs, pplay, t, q, diafra, dialiq) |
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| 318 | USE dimphy |
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| 319 | IMPLICIT NONE |
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| 320 | |
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| 321 | include "YOMCST.h" |
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| 322 | |
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| 323 | ! Arguments d'entree: |
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| 324 | REAL paprs(klon, klev+1) ! pression (Pa) a inter-couche |
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| 325 | REAL pplay(klon, klev) ! pression (Pa) au milieu de couche |
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| 326 | REAL t(klon, klev) ! temperature (K) |
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| 327 | REAL q(klon, klev) ! humidite specifique (Kg/Kg) |
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| 328 | |
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| 329 | ! Arguments de sortie: |
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| 330 | REAL diafra(klon, klev) ! fraction nuageuse diagnostiquee |
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| 331 | REAL dialiq(klon, klev) ! eau liquide nuageuse |
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| 332 | |
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| 333 | REAL cetamb |
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| 334 | PARAMETER (cetamb=0.80) |
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| 335 | REAL cloia, cloib, cloic, cloid |
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| 336 | PARAMETER (cloia=1.0E+02, cloib=-10.00, cloic=-0.6, cloid=5.0) |
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| 337 | ! cc PARAMETER (CLOIA=1.0E+02, CLOIB=-10.00, CLOIC=-0.9, CLOID=5.0) |
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| 338 | REAL rgammas |
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| 339 | PARAMETER (rgammas=0.05) |
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| 340 | REAL crhl |
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| 341 | PARAMETER (crhl=0.15) |
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| 342 | ! cc PARAMETER (CRHL=0.70) |
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| 343 | REAL t_coup |
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| 344 | PARAMETER (t_coup=234.0) |
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| 345 | |
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| 346 | ! Variables locales: |
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| 347 | INTEGER i, k, kb, invb(klon) |
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| 348 | REAL zqs, zrhb, zcll, zdthmin(klon), zdthdp |
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| 349 | REAL zdelta, zcor |
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| 350 | |
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| 351 | ! Fonctions thermodynamiques: |
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| 352 | include "YOETHF.h" |
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| 353 | include "FCTTRE.h" |
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| 354 | |
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| 355 | ! Initialisation: |
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| 356 | |
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| 357 | DO k = 1, klev |
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| 358 | DO i = 1, klon |
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| 359 | diafra(i, k) = 0.0 |
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| 360 | dialiq(i, k) = 0.0 |
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| 361 | END DO |
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| 362 | END DO |
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| 363 | |
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| 364 | DO i = 1, klon |
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| 365 | invb(i) = klev |
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| 366 | zdthmin(i) = 0.0 |
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| 367 | END DO |
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| 368 | |
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| 369 | DO k = 2, klev/2 - 1 |
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| 370 | DO i = 1, klon |
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| 371 | zdthdp = (t(i,k)-t(i,k+1))/(pplay(i,k)-pplay(i,k+1)) - & |
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| 372 | rd*0.5*(t(i,k)+t(i,k+1))/rcpd/paprs(i, k+1) |
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| 373 | zdthdp = zdthdp*cloia |
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| 374 | IF (pplay(i,k)>cetamb*paprs(i,1) .AND. zdthdp<zdthmin(i)) THEN |
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| 375 | zdthmin(i) = zdthdp |
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| 376 | invb(i) = k |
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| 377 | END IF |
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| 378 | END DO |
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| 379 | END DO |
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| 380 | |
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| 381 | DO i = 1, klon |
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| 382 | kb = invb(i) |
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| 383 | IF (thermcep) THEN |
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| 384 | zdelta = max(0., sign(1.,rtt-t(i,kb))) |
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| 385 | zqs = r2es*foeew(t(i,kb), zdelta)/pplay(i, kb) |
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| 386 | zqs = min(0.5, zqs) |
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| 387 | zcor = 1./(1.-retv*zqs) |
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| 388 | zqs = zqs*zcor |
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| 389 | ELSE |
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| 390 | IF (t(i,kb)<t_coup) THEN |
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| 391 | zqs = qsats(t(i,kb))/pplay(i, kb) |
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| 392 | ELSE |
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| 393 | zqs = qsatl(t(i,kb))/pplay(i, kb) |
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| 394 | END IF |
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| 395 | END IF |
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| 396 | zcll = cloib*zdthmin(i) + cloic |
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| 397 | zcll = min(1.0, max(0.0,zcll)) |
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| 398 | zrhb = q(i, kb)/zqs |
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| 399 | IF (zcll>0.0 .AND. zrhb<crhl) 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 | END DO |
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| 404 | |
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| 405 | RETURN |
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| 406 | END SUBROUTINE diagcld2 |
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