1 | ! $Id: nuage.F90 2408 2015-12-14 10:43:09Z fcheruy $ |
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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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