1 | !$Id $ |
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2 | |
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3 | SUBROUTINE lsc_scav(pdtime,it,iflag_lscav, aerosol, & |
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4 | oliq,flxr,flxs,rneb,beta_fisrt, & |
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5 | beta_v1,pplay,paprs,t,tr_seri, & |
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6 | d_tr_insc,d_tr_bcscav,d_tr_evap,qPrls) |
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7 | USE ioipsl |
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8 | USE dimphy |
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9 | USE mod_grid_phy_lmdz |
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10 | USE mod_phys_lmdz_para |
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11 | USE traclmdz_mod |
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12 | USE infotrac_phy,ONLY : nbtr |
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13 | USE iophy |
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14 | IMPLICIT NONE |
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15 | !===================================================================== |
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16 | ! Objet : depot humide (lessivage et evaporation) de traceurs |
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17 | ! Inspired by routines of Olivier Boucher (mars 1998) |
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18 | ! author R. Pilon 10 octobre 2012 |
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19 | ! last modification 16/01/2013 (reformulation partie evaporation) |
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20 | !===================================================================== |
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21 | |
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22 | include "chem.h" |
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23 | include "YOMCST.h" |
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24 | include "YOECUMF.h" |
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25 | |
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26 | ! inputs |
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27 | REAL,INTENT(IN) :: pdtime ! time step (s) |
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28 | INTEGER,INTENT(IN) :: it ! tracer number |
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29 | INTEGER,INTENT(IN) :: iflag_lscav ! LS scavenging param: 3=Reddy_Boucher2004, 4=3+RPilon. |
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30 | REAL,DIMENSION(klon,klev+1),INTENT(IN) :: flxr ! flux precipitant de pluie |
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31 | REAL,DIMENSION(klon,klev+1),INTENT(IN) :: flxs ! flux precipitant de neige |
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32 | REAL,INTENT(IN) :: oliq ! contenu en eau liquide dans le nuage (kg/kg) |
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33 | REAL,DIMENSION(klon,klev),INTENT(IN) :: rneb |
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34 | REAL,DIMENSION(klon,klev),INTENT(IN) :: pplay ! pression |
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35 | REAL,DIMENSION(klon,klev+1),INTENT(IN) :: paprs ! pression |
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36 | REAL,DIMENSION(klon,klev),INTENT(IN) :: t ! temperature |
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37 | ! tracers |
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38 | LOGICAL,DIMENSION(nbtr), INTENT(IN) :: aerosol |
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39 | REAL,DIMENSION(klon,klev,nbtr),INTENT(IN) :: tr_seri ! q de traceur |
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40 | REAL,DIMENSION(klon,klev),INTENT(IN) :: beta_fisrt ! taux de conversion de l'eau cond |
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41 | REAL,DIMENSION(klon,klev),INTENT(OUT) :: beta_v1 ! -- (originale version) |
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42 | REAL,DIMENSION(klon) :: his_dh ! tendance de traceur integre verticalement |
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43 | REAL,DIMENSION(klon,klev,nbtr),INTENT(OUT) :: d_tr_insc ! tendance du traceur |
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44 | REAL,DIMENSION(klon,klev,nbtr),INTENT(OUT) :: d_tr_bcscav ! tendance de traceur |
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45 | REAL,DIMENSION(klon,klev,nbtr),INTENT(OUT) :: d_tr_evap |
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46 | REAL,DIMENSION(klon,nbtr),INTENT(OUT) :: qPrls !jyg: concentration tra dans pluie LS a la surf. |
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47 | REAL :: dxin,dxev ! tendance temporaire de traceur incloud |
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48 | REAL,DIMENSION(klon,klev) :: dxbc ! tendance temporaire de traceur bc |
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49 | |
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50 | ! variables locales |
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51 | LOGICAL,SAVE :: debut=.TRUE. |
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52 | !$OMP THREADPRIVATE(debut) |
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53 | ! |
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54 | REAL,PARAMETER :: henry=1.4 ! constante de Henry en mol/l/atm ~1.4 for gases |
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55 | REAL :: henry_t ! constante de Henry a T t (mol/l/atm) |
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56 | REAL,PARAMETER :: kk=2900. ! coefficient de dependence en T (K) |
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57 | REAL :: f_a ! rapport de la phase aqueuse a la phase gazeuse |
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58 | REAL :: beta ! taux de conversion de l'eau en pluie |
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59 | |
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60 | INTEGER :: i, k |
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61 | REAL,DIMENSION(klon,klev) :: scav ! water liquid content / fraction aqueuse du constituant |
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62 | REAL,DIMENSION(klon,klev) :: zrho |
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63 | REAL,DIMENSION(klon,klev) :: zdz |
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64 | REAL,DIMENSION(klon,klev) :: zmass ! layer mass |
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65 | |
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66 | REAL :: frac_ev ! cste pour la reevaporation : dropplet shrinking |
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67 | ! frac_ev = frac_gas ou frac_aer |
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68 | REAL,PARAMETER :: frac_gas=1.0 ! cste pour la reevaporation pour les gaz |
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69 | REAL :: frac_aer ! cste pour la reevaporation pour les particules |
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70 | REAL,DIMENSION(klon,klev) :: deltaP ! P(i+1)-P(i) |
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71 | REAL,DIMENSION(klon,klev) :: beta_ev ! dP/P(i+1) |
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72 | |
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73 | ! 101.325 m3/l x Pa/atm |
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74 | ! R Pa.m3/mol/K |
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75 | ! cste de dissolution pour le depot humide |
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76 | REAL,SAVE :: frac_fine_scav |
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77 | REAL,SAVE :: frac_coar_scav |
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78 | !$OMP THREADPRIVATE(frac_fine_scav, frac_coar_scav) |
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79 | |
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80 | ! below-cloud scav variables |
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81 | ! aerosol : alpha_r=0.001, gas 0.001 (Pruppacher & Klett 1967) |
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82 | REAL,SAVE :: alpha_r ! coefficient d'impaction pour la pluie |
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83 | REAL,SAVE :: alpha_s ! coefficient d'impaction pour la neige |
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84 | REAL,SAVE :: R_r ! mean raindrop radius (m) |
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85 | REAL,SAVE :: R_s ! mean snow crystal radius (m) |
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86 | !$OMP THREADPRIVATE(alpha_r, alpha_s, R_r, R_s) |
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87 | REAL :: pr, ps, ice, water |
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88 | ! REAL :: conserv |
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89 | ! |
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90 | ! |
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91 | IF (debut) THEN |
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92 | ! |
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93 | alpha_r=0.001 ! coefficient d'impaction pour la pluie |
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94 | alpha_s=0.01 ! coefficient d'impaction pour la neige |
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95 | R_r=0.001 ! mean raindrop radius (m) |
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96 | R_s=0.001 ! mean snow crystal radius (m) |
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97 | frac_fine_scav=0.7 |
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98 | frac_coar_scav=0.7 |
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99 | ! Droplet size shrinks by evap |
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100 | frac_aer=0.5 |
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101 | ! |
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102 | OPEN(99,file='lsc_scav_param.data',status='old', & |
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103 | form='formatted',err=9999) |
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104 | READ(99,*,end=9998) alpha_r |
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105 | READ(99,*,end=9998) alpha_s |
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106 | READ(99,*,end=9998) R_r |
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107 | READ(99,*,end=9998) R_s |
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108 | READ(99,*,end=9998) frac_fine_scav |
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109 | READ(99,*,end=9998) frac_coar_scav |
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110 | READ(99,*,end=9998) frac_aer |
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111 | 9998 CONTINUE |
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112 | CLOSE(99) |
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113 | 9999 CONTINUE |
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114 | |
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115 | print*,'alpha_r',alpha_r |
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116 | print*,'alpha_s',alpha_s |
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117 | print*,'R_r',R_r |
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118 | print*,'R_s',R_s |
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119 | print*,'frac_fine_scav',frac_fine_scav |
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120 | print*,'frac_coar_scav',frac_coar_scav |
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121 | print*,'frac_aer ev',frac_aer |
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122 | ! |
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123 | ENDIF !(debut) |
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124 | !!!!!!!!!!!!!!!!!!!!!!!!!!! |
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125 | ! |
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126 | ! initialization |
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127 | dxin=0. |
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128 | dxev=0. |
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129 | beta_ev=0. |
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130 | |
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131 | DO i=1,klon |
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132 | his_dh(i)=0. |
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133 | ENDDO |
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134 | |
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135 | DO k=1,klev |
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136 | DO i=1, klon |
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137 | dxbc(i,k)=0. |
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138 | beta_v1(i,k)=0. |
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139 | deltaP(i,k)=0. |
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140 | ENDDO |
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141 | ENDDO |
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142 | |
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143 | ! pressure and size of the layer |
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144 | DO k=klev, 1, -1 |
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145 | DO i=1, klon |
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146 | zrho(i,k)=pplay(i,k)/t(i,k)/RD |
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147 | zdz(i,k)=(paprs(i,k)-paprs(i,k+1))/zrho(i,k)/RG |
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148 | zmass(i,k)=(paprs(i,k)-paprs(i,k+1))/RG |
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149 | ENDDO |
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150 | ENDDO |
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151 | |
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152 | !jyg< |
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153 | !! Temporary correction: all non-aerosol tracers are dealt with in the same way. |
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154 | !! Should be updated once it has been decided how gases should be dealt with. |
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155 | IF (aerosol(it)) THEN |
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156 | frac_ev=frac_aer |
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157 | ELSE ! gas |
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158 | frac_ev=frac_gas |
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159 | ENDIF |
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160 | ! |
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161 | !jyg< |
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162 | IF (aerosol(it)) THEN ! aerosol |
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163 | DO k=1, klev |
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164 | DO i=1, klon |
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165 | scav(i,k)=frac_fine_scav |
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166 | ENDDO |
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167 | ENDDO |
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168 | ELSE ! gas |
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169 | DO k=1, klev |
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170 | DO i=1, klon |
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171 | henry_t=henry*exp(-kk*(1./298.-1./t(i,k))) ! mol/l/atm |
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172 | f_a=henry_t/101.325*R*t(i,k)*oliq*zrho(i,k)/rho_water |
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173 | scav(i,k)=f_a/(1.+f_a) |
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174 | ENDDO |
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175 | ENDDO |
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176 | ENDIF |
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177 | |
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178 | DO k=klev-1, 1, -1 |
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179 | DO i=1, klon |
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180 | ! incloud scavenging |
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181 | IF (iflag_lscav .EQ. 4) THEN |
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182 | beta=beta_fisrt(i,k)*rneb(i,k) |
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183 | ELSE |
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184 | beta=flxr(i,k)-flxr(i,k+1)+flxs(i,k)-flxs(i,k+1) |
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185 | beta=beta/zmass(i,k)/oliq |
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186 | beta=MAX(0.,beta) |
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187 | ENDIF ! (iflag_lscav .eq. 4) |
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188 | beta_v1(i,k)=beta !! for output |
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189 | ! |
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190 | dxin=tr_seri(i,k,it)*(exp(-scav(i,k)*beta*pdtime)-1.) |
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191 | his_dh(i)=his_dh(i)-dxin*zmass(i,k)/pdtime ! kg/m2/s |
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192 | d_tr_insc(i,k,it)=dxin ! kg/kg/timestep |
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193 | |
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194 | ! below-cloud impaction |
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195 | !jyg< |
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196 | IF (.NOT.aerosol(it)) THEN |
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197 | d_tr_bcscav(i,k,it)=0. |
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198 | ELSE |
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199 | pr=0.5*(flxr(i,k)+flxr(i,k+1)) |
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200 | ps=0.5*(flxs(i,k)+flxs(i,k+1)) |
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201 | water=pr*alpha_r/R_r/rho_water |
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202 | ice=ps*alpha_s/R_s/rho_ice |
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203 | dxbc(i,k)=-3./4.*tr_seri(i,k,it)*pdtime*(water+ice) |
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204 | ! add tracers from below cloud scav in his_dh |
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205 | his_dh(i)=his_dh(i)-dxbc(i,k)*zmass(i,k)/pdtime ! kg/m2/s |
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206 | d_tr_bcscav(i,k,it)=dxbc(i,k) ! kg/kg/timestep |
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207 | ENDIF |
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208 | |
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209 | ! reevaporation |
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210 | deltaP(i,k)=flxr(i,k+1)+flxs(i,k+1)-flxr(i,k)-flxs(i,k) |
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211 | deltaP(i,k)=max(deltaP(i,k),0.) |
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212 | |
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213 | IF (flxr(i,k+1)+flxs(i,k+1).GT.1.e-16) THEn |
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214 | beta_ev(i,k)=deltaP(i,k)/(flxr(i,k+1)+flxs(i,k+1)) |
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215 | ELSE |
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216 | beta_ev(i,k)=0. |
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217 | ENDIF |
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218 | |
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219 | beta_ev(i,k)=max(min(1.,beta_ev(i,k)),0.) |
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220 | |
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221 | !jyg |
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222 | IF (ABS(1.-(1.-frac_ev)*beta_ev(i,k)).GT.1.e-16) THEN |
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223 | ! remove tracers from precipitation owing to release by evaporation in his_dh |
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224 | dxev=frac_ev*beta_ev(i,k)*his_dh(i)*pdtime/zmass(i,k)/(1.-(1.-frac_ev)*beta_ev(i,k)) |
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225 | his_dh(i)=his_dh(i)*(1.-frac_ev*beta_ev(i,k)/(1.-(1.-frac_ev)*beta_ev(i,k))) |
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226 | ELSE |
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227 | dxev=his_dh(i)*pdtime/zmass(i,k) |
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228 | his_dh(i)=0. |
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229 | ENDIF |
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230 | ! |
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231 | ! print*, k, 'beta_ev',beta_ev |
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232 | ! remove tracers from precipitation owing to release by evaporation in his_dh |
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233 | ! dxev=frac_ev*deltaP(i,k)*pdtime * his_dh(i) /(zrho(i,k)*zdz(i,k)) |
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234 | !rplmd |
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235 | ! dxev=frac_ev*deltaP(i,k)*his_dh(i) *pdtime/(zrho(i,k)*zdz(i,k))/max(flxr(i,k)+flxs(i,k),1.e-16) |
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236 | |
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237 | d_tr_evap(i,k,it)=dxev ! kg/kg/timestep |
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238 | ! |
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239 | ENDDO |
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240 | ENDDO |
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241 | ! |
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242 | DO i = 1,klon |
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243 | qPrls(i,it) = his_dh(i)/max(flxr(i,1)+flxs(i,1),1.e-16) |
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244 | ENDDO |
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245 | ! |
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246 | ! test de conservation |
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247 | ! conserv=0. |
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248 | ! DO k= klev,1,-1 |
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249 | ! DO i=1, klon |
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250 | ! conserv=conserv+d_tr_insc(i,k,it)*(paprs(i,k)-paprs(i,k+1))/RG & |
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251 | ! +d_tr_bcscav(i,k,it)*(paprs(i,k)-paprs(i,k+1))/RG & |
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252 | ! +d_tr_evap(i,k,it)*(paprs(i,k)-paprs(i,k+1))/RG |
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253 | ! if(it.eq.3) write(*,'(I2,2X,a,e20.12,2X,a,e20.12,2X,a,e20.12,2X,a,e20.12)'),& |
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254 | ! k,'lsc conserv ',conserv,'insc',d_tr_insc(i,k,it),'bc',d_tr_bcscav(i,k,it),'ev',d_tr_evap(i,k,it) |
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255 | ! ENDDO |
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256 | ! ENDDO |
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257 | |
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258 | END SUBROUTINE lsc_scav |
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