1 | ! |
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2 | ! $Id: traccoag_mod.F90 3798 2021-01-11 22:24:08Z lguez $ |
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3 | ! |
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4 | MODULE traccoag_mod |
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5 | ! |
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6 | ! This module calculates the concentration of aerosol particles in certain size bins |
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7 | ! considering coagulation and sedimentation. |
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8 | ! |
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9 | CONTAINS |
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10 | |
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11 | SUBROUTINE traccoag(pdtphys, gmtime, debutphy, julien, & |
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12 | presnivs, xlat, xlon, pphis, pphi, & |
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13 | t_seri, pplay, paprs, sh, rh, tr_seri) |
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14 | |
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15 | USE phys_local_var_mod, ONLY: mdw, R2SO4, DENSO4, f_r_wet, surf_PM25_sulf, & |
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16 | & budg_emi_ocs, budg_emi_so2, budg_emi_h2so4, budg_emi_part |
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17 | |
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18 | USE dimphy |
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19 | USE infotrac_phy |
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20 | USE aerophys |
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21 | USE geometry_mod, ONLY : cell_area, boundslat |
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22 | USE mod_grid_phy_lmdz |
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23 | USE mod_phys_lmdz_mpi_data, ONLY : is_mpi_root |
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24 | USE mod_phys_lmdz_para, only: gather, scatter |
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25 | USE phys_cal_mod |
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26 | USE sulfate_aer_mod |
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27 | USE phys_local_var_mod, ONLY: stratomask |
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28 | USE YOMCST |
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29 | USE print_control_mod, ONLY: lunout |
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30 | USE strataer_mod |
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31 | USE phys_cal_mod, ONLY : year_len |
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32 | |
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33 | IMPLICIT NONE |
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34 | |
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35 | ! Input argument |
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36 | !--------------- |
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37 | REAL,INTENT(IN) :: pdtphys ! Pas d'integration pour la physique (seconde) |
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38 | REAL,INTENT(IN) :: gmtime ! Heure courante |
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39 | LOGICAL,INTENT(IN) :: debutphy ! le flag de l'initialisation de la physique |
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40 | INTEGER,INTENT(IN) :: julien ! Jour julien |
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41 | |
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42 | REAL,DIMENSION(klev),INTENT(IN) :: presnivs! pressions approximat. des milieux couches (en PA) |
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43 | REAL,DIMENSION(klon),INTENT(IN) :: xlat ! latitudes pour chaque point |
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44 | REAL,DIMENSION(klon),INTENT(IN) :: xlon ! longitudes pour chaque point |
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45 | REAL,DIMENSION(klon),INTENT(IN) :: pphis ! geopotentiel du sol |
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46 | REAL,DIMENSION(klon,klev),INTENT(IN) :: pphi ! geopotentiel de chaque couche |
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47 | |
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48 | REAL,DIMENSION(klon,klev),INTENT(IN) :: t_seri ! Temperature |
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49 | REAL,DIMENSION(klon,klev),INTENT(IN) :: pplay ! pression pour le mileu de chaque couche (en Pa) |
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50 | REAL,DIMENSION(klon,klev+1),INTENT(IN) :: paprs ! pression pour chaque inter-couche (en Pa) |
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51 | REAL,DIMENSION(klon,klev),INTENT(IN) :: sh ! humidite specifique |
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52 | REAL,DIMENSION(klon,klev),INTENT(IN) :: rh ! humidite relative |
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53 | |
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54 | ! Output argument |
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55 | !---------------- |
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56 | REAL,DIMENSION(klon,klev,nbtr),INTENT(INOUT) :: tr_seri ! Concentration Traceur [U/KgA] |
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57 | |
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58 | ! Local variables |
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59 | !---------------- |
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60 | REAL :: m_aer_emiss_vol_daily ! daily injection mass emission |
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61 | INTEGER :: it, k, i, ilon, ilev, itime, i_int, ieru |
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62 | LOGICAL,DIMENSION(klon,klev) :: is_strato ! true = above tropopause, false = below |
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63 | REAL,DIMENSION(klon,klev) :: m_air_gridbox ! mass of air in every grid box [kg] |
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64 | REAL,DIMENSION(klon_glo,klev,nbtr) :: tr_seri_glo ! Concentration Traceur [U/KgA] |
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65 | REAL,DIMENSION(klev+1) :: altLMDz ! altitude of layer interfaces in m |
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66 | REAL,DIMENSION(klev) :: f_lay_emiss ! fraction of emission for every vertical layer |
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67 | REAL :: f_lay_sum ! sum of layer emission fractions |
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68 | REAL :: alt ! altitude for integral calculation |
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69 | INTEGER,PARAMETER :: n_int_alt=10 ! number of subintervals for integration over Gaussian emission profile |
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70 | REAL,DIMENSION(nbtr_bin) :: r_bin ! particle radius in size bin [m] |
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71 | REAL,DIMENSION(nbtr_bin) :: r_lower ! particle radius at lower bin boundary [m] |
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72 | REAL,DIMENSION(nbtr_bin) :: r_upper ! particle radius at upper bin boundary [m] |
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73 | REAL,DIMENSION(nbtr_bin) :: m_part_dry ! mass of one dry particle in size bin [kg] |
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74 | REAL :: zrho ! Density of air [kg/m3] |
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75 | REAL :: zdz ! thickness of atm. model layer in m |
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76 | REAL,DIMENSION(klev) :: zdm ! mass of atm. model layer in kg |
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77 | REAL,DIMENSION(klon,klev) :: dens_aer ! density of aerosol particles [kg/m3 aerosol] with default H2SO4 mass fraction |
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78 | REAL :: emission ! emission |
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79 | REAL :: theta_min, theta_max ! for SAI computation between two latitudes |
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80 | REAL :: dlat_loc |
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81 | |
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82 | IF (is_mpi_root) THEN |
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83 | WRITE(lunout,*) 'in traccoag: date from phys_cal_mod =',year_cur,'-',mth_cur,'-',day_cur,'-',hour |
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84 | WRITE(lunout,*) 'IN traccoag flag_sulf_emit: ',flag_sulf_emit |
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85 | ENDIF |
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86 | |
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87 | DO it=1, nbtr_bin |
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88 | r_bin(it)=mdw(it)/2. |
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89 | ENDDO |
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90 | |
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91 | !--set boundaries of size bins |
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92 | DO it=1, nbtr_bin |
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93 | IF (it.EQ.1) THEN |
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94 | r_upper(it)=sqrt(r_bin(it+1)*r_bin(it)) |
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95 | r_lower(it)=r_bin(it)**2./r_upper(it) |
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96 | ELSEIF (it.EQ.nbtr_bin) THEN |
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97 | r_lower(it)=sqrt(r_bin(it)*r_bin(it-1)) |
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98 | r_upper(it)=r_bin(it)**2./r_lower(it) |
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99 | ELSE |
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100 | r_lower(it)=sqrt(r_bin(it)*r_bin(it-1)) |
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101 | r_upper(it)=sqrt(r_bin(it+1)*r_bin(it)) |
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102 | ENDIF |
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103 | ENDDO |
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104 | |
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105 | IF (debutphy .and. is_mpi_root) THEN |
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106 | DO it=1, nbtr_bin |
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107 | WRITE(lunout,*) 'radius bin', it, ':', r_bin(it), '(from', r_lower(it), 'to', r_upper(it), ')' |
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108 | ENDDO |
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109 | ENDIF |
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110 | |
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111 | !--initialising logical is_strato from stratomask |
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112 | is_strato(:,:)=.FALSE. |
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113 | WHERE (stratomask.GT.0.5) is_strato=.TRUE. |
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114 | |
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115 | ! STRACOMP (H2O, P, t_seri -> aerosol composition (R2SO4)) |
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116 | ! H2SO4 mass fraction in aerosol (%) |
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117 | CALL stracomp(sh,t_seri,pplay) |
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118 | |
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119 | ! aerosol density (gr/cm3) |
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120 | CALL denh2sa(t_seri) |
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121 | |
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122 | ! compute factor for converting dry to wet radius (for every grid box) |
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123 | f_r_wet(:,:) = (dens_aer_dry/(DENSO4(:,:)*1000.)/(R2SO4(:,:)/100.))**(1./3.) |
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124 | |
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125 | !--calculate mass of air in every grid box |
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126 | DO ilon=1, klon |
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127 | DO ilev=1, klev |
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128 | m_air_gridbox(ilon,ilev)=(paprs(ilon,ilev)-paprs(ilon,ilev+1))/RG*cell_area(ilon) |
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129 | ENDDO |
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130 | ENDDO |
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131 | |
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132 | ! IF (debutphy) THEN |
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133 | ! CALL gather(tr_seri, tr_seri_glo) |
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134 | ! IF (MAXVAL(tr_seri_glo).LT.1.e-30) THEN |
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135 | !--initialising tracer concentrations to zero |
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136 | ! DO it=1, nbtr |
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137 | ! tr_seri(:,:,it)=0.0 |
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138 | ! ENDDO |
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139 | ! ENDIF |
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140 | ! ENDIF |
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141 | |
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142 | !--initialise emission diagnostics |
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143 | budg_emi_ocs(:)=0.0 |
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144 | budg_emi_so2(:)=0.0 |
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145 | budg_emi_h2so4(:)=0.0 |
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146 | budg_emi_part(:)=0.0 |
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147 | |
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148 | !--sulfur emission, depending on chosen scenario (flag_sulf_emit) |
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149 | SELECT CASE(flag_sulf_emit) |
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150 | |
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151 | CASE(0) ! background aerosol |
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152 | ! do nothing (no emission) |
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153 | |
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154 | CASE(1) ! volcanic eruption |
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155 | !--only emit on day of eruption |
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156 | ! stretch emission over one day of Pinatubo eruption |
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157 | DO ieru=1, nErupt |
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158 | IF (year_cur==year_emit_vol(ieru).AND.mth_cur==mth_emit_vol(ieru).AND.& |
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159 | day_cur>=day_emit_vol(ieru).AND.day_cur<(day_emit_vol(ieru)+injdur)) THEN |
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160 | ! |
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161 | ! daily injection mass emission - NL |
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162 | m_aer_emiss_vol_daily = m_aer_emiss_vol(ieru)/(REAL(injdur)*REAL(ponde_lonlat_vol(ieru))) |
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163 | WRITE(lunout,*) 'IN traccoag DD m_aer_emiss_vol(ieru)=',m_aer_emiss_vol(ieru), & |
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164 | 'ponde_lonlat_vol(ieru)=',ponde_lonlat_vol(ieru),'(injdur*ponde_lonlat_vol(ieru))', & |
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165 | (injdur*ponde_lonlat_vol(ieru)),'m_aer_emiss_vol_daily=',m_aer_emiss_vol_daily,'ieru=',ieru |
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166 | WRITE(lunout,*) 'IN traccoag, dlon=',dlon |
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167 | DO i=1,klon |
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168 | !Pinatubo eruption at 15.14N, 120.35E |
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169 | dlat_loc=180./RPI/2.*(boundslat(i,1)-boundslat(i,3)) ! dlat = half difference of boundary latitudes |
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170 | WRITE(lunout,*) 'IN traccoag, dlat=',dlat_loc |
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171 | IF ( xlat(i).GE.xlat_min_vol(ieru)-dlat_loc .AND. xlat(i).LT.xlat_max_vol(ieru)+dlat_loc .AND. & |
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172 | xlon(i).GE.xlon_min_vol(ieru)-dlon .AND. xlon(i).LT.xlon_max_vol(ieru)+dlon ) THEN |
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173 | ! |
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174 | WRITE(lunout,*) 'coordinates of volcanic injection point=',xlat(i),xlon(i),day_cur,mth_cur,year_cur |
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175 | WRITE(lunout,*) 'DD m_aer_emiss_vol_daily=',m_aer_emiss_vol_daily |
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176 | ! compute altLMDz |
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177 | altLMDz(:)=0.0 |
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178 | DO k=1, klev |
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179 | zrho=pplay(i,k)/t_seri(i,k)/RD !air density in kg/m3 |
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180 | zdm(k)=(paprs(i,k)-paprs(i,k+1))/RG !mass of layer in kg |
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181 | zdz=zdm(k)/zrho !thickness of layer in m |
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182 | altLMDz(k+1)=altLMDz(k)+zdz !altitude of interface |
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183 | ENDDO |
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184 | |
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185 | SELECT CASE(flag_sulf_emit_distrib) |
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186 | |
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187 | CASE(0) ! Gaussian distribution |
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188 | !compute distribution of emission to vertical model layers (based on Gaussian peak in altitude) |
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189 | f_lay_sum=0.0 |
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190 | DO k=1, klev |
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191 | f_lay_emiss(k)=0.0 |
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192 | DO i_int=1, n_int_alt |
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193 | alt=altLMDz(k)+float(i_int)*(altLMDz(k+1)-altLMDz(k))/float(n_int_alt) |
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194 | f_lay_emiss(k)=f_lay_emiss(k)+1./(sqrt(2.*RPI)*sigma_alt_vol(ieru))* & |
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195 | & exp(-0.5*((alt-altemiss_vol(ieru))/sigma_alt_vol(ieru))**2.)* & |
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196 | & (altLMDz(k+1)-altLMDz(k))/float(n_int_alt) |
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197 | ENDDO |
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198 | f_lay_sum=f_lay_sum+f_lay_emiss(k) |
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199 | ENDDO |
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200 | |
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201 | CASE(1) ! Uniform distribution |
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202 | ! In this case, parameter sigma_alt_vol(ieru) is considered to be half the |
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203 | ! height of the injection, centered around altemiss_vol(ieru) |
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204 | DO k=1, klev |
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205 | f_lay_emiss(k)=max(min(altemiss_vol(ieru)+sigma_alt_vol(ieru),altLMDz(k+1))- & |
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206 | & max(altemiss_vol(ieru)-sigma_alt_vol(ieru),altLMDz(k)),0.)/(2.*sigma_alt_vol(ieru)) |
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207 | f_lay_sum=f_lay_sum+f_lay_emiss(k) |
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208 | ENDDO |
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209 | |
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210 | END SELECT ! End CASE over flag_sulf_emit_distrib) |
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211 | |
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212 | WRITE(lunout,*) "IN traccoag m_aer_emiss_vol=",m_aer_emiss_vol(ieru) |
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213 | WRITE(lunout,*) "IN traccoag f_lay_emiss=",f_lay_emiss |
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214 | !correct for step integration error |
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215 | f_lay_emiss(:)=f_lay_emiss(:)/f_lay_sum |
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216 | !emission as SO2 gas (with m(SO2)=64/32*m_aer_emiss) |
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217 | !vertically distributed emission |
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218 | DO k=1, klev |
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219 | ! stretch emission over one day of Pinatubo eruption |
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220 | emission=m_aer_emiss_vol_daily*(mSO2mol/mSatom)/m_air_gridbox(i,k)*f_lay_emiss(k)/1./(86400.-pdtphys) |
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221 | tr_seri(i,k,id_SO2_strat)=tr_seri(i,k,id_SO2_strat)+emission*pdtphys |
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222 | budg_emi_so2(i)=budg_emi_so2(i)+emission*zdm(k)*mSatom/mSO2mol |
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223 | ENDDO |
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224 | ENDIF ! emission grid cell |
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225 | ENDDO ! klon loop |
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226 | WRITE(lunout,*) "IN traccoag (ieru=",ieru,") m_aer_emiss_vol_daily=",m_aer_emiss_vol_daily |
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227 | ENDIF ! emission period |
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228 | ENDDO ! eruption number |
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229 | |
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230 | CASE(2) ! stratospheric aerosol injections (SAI) |
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231 | ! |
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232 | DO i=1,klon |
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233 | ! SAI standard scenario with continuous emission from 1 grid point at the equator |
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234 | ! SAI emission on single month |
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235 | ! SAI continuous emission o |
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236 | dlat_loc=180./RPI/2.*(boundslat(i,1)-boundslat(i,3)) ! dlat = half difference of boundary latitudes |
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237 | IF ( xlat(i).GE.xlat_sai-dlat_loc .AND. xlat(i).LT.xlat_sai+dlat_loc .AND. & |
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238 | & xlon(i).GE.xlon_sai-dlon .AND. xlon(i).LT.xlon_sai+dlon ) THEN |
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239 | ! |
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240 | ! compute altLMDz |
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241 | altLMDz(:)=0.0 |
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242 | DO k=1, klev |
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243 | zrho=pplay(i,k)/t_seri(i,k)/RD !air density in kg/m3 |
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244 | zdm(k)=(paprs(i,k)-paprs(i,k+1))/RG !mass of layer in kg |
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245 | zdz=zdm(k)/zrho !thickness of layer in m |
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246 | altLMDz(k+1)=altLMDz(k)+zdz !altitude of interface |
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247 | ENDDO |
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248 | |
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249 | SELECT CASE(flag_sulf_emit_distrib) |
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250 | |
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251 | CASE(0) ! Gaussian distribution |
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252 | !compute distribution of emission to vertical model layers (based on Gaussian peak in altitude) |
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253 | f_lay_sum=0.0 |
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254 | DO k=1, klev |
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255 | f_lay_emiss(k)=0.0 |
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256 | DO i_int=1, n_int_alt |
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257 | alt=altLMDz(k)+float(i_int)*(altLMDz(k+1)-altLMDz(k))/float(n_int_alt) |
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258 | f_lay_emiss(k)=f_lay_emiss(k)+1./(sqrt(2.*RPI)*sigma_alt_sai)* & |
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259 | & exp(-0.5*((alt-altemiss_sai)/sigma_alt_sai)**2.)* & |
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260 | & (altLMDz(k+1)-altLMDz(k))/float(n_int_alt) |
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261 | ENDDO |
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262 | f_lay_sum=f_lay_sum+f_lay_emiss(k) |
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263 | ENDDO |
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264 | |
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265 | CASE(1) ! Uniform distribution |
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266 | f_lay_sum=0.0 |
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267 | ! In this case, parameter sigma_alt_vol(ieru) is considered to be half |
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268 | ! the height of the injection, centered around altemiss_sai |
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269 | DO k=1, klev |
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270 | f_lay_emiss(k)=max(min(altemiss_sai+sigma_alt_sai,altLMDz(k+1))- & |
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271 | & max(altemiss_sai-sigma_alt_sai,altLMDz(k)),0.)/(2.*sigma_alt_sai) |
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272 | f_lay_sum=f_lay_sum+f_lay_emiss(k) |
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273 | ENDDO |
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274 | |
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275 | END SELECT ! Gaussian or uniform distribution |
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276 | |
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277 | !correct for step integration error |
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278 | f_lay_emiss(:)=f_lay_emiss(:)/f_lay_sum |
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279 | !emission as SO2 gas (with m(SO2)=64/32*m_aer_emiss) |
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280 | !vertically distributed emission |
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281 | DO k=1, klev |
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282 | ! stretch emission over whole year (360d) |
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283 | emission=m_aer_emiss_sai*(mSO2mol/mSatom)/m_air_gridbox(i,k)*f_lay_emiss(k)/FLOAT(year_len)/86400. |
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284 | tr_seri(i,k,id_SO2_strat)=tr_seri(i,k,id_SO2_strat)+emission*pdtphys |
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285 | budg_emi_so2(i)=budg_emi_so2(i)+emission*zdm(k)*mSatom/mSO2mol |
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286 | ENDDO |
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287 | |
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288 | ! !emission as monodisperse particles with 0.1um dry radius (BIN21) |
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289 | ! !vertically distributed emission |
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290 | ! DO k=1, klev |
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291 | ! ! stretch emission over whole year (360d) |
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292 | ! emission=m_aer_emiss*(mH2SO4mol/mSatom)/m_part_dry(21)/m_air_gridbox(i,k)*f_lay_emiss(k)/FLOAT(year_len)/86400. |
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293 | ! tr_seri(i,k,id_BIN01_strat+20)=tr_seri(i,k,id_BIN01_strat+20)+emission*pdtphys |
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294 | ! budg_emi_part(i)=budg_emi_part(i)+emission*zdm(k)*mSatom/mH2SO4mol |
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295 | ! ENDDO |
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296 | ENDIF ! emission grid cell |
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297 | ENDDO ! klon loop |
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298 | |
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299 | CASE(3) ! --- SAI injection over a single band of longitude and between |
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300 | ! lat_min and lat_max |
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301 | |
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302 | DO i=1,klon |
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303 | ! SAI scenario with continuous emission |
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304 | dlat_loc=180./RPI/2.*(boundslat(i,1)-boundslat(i,3)) ! dlat = half difference of boundary latitudes |
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305 | theta_min = max(xlat(i)-dlat_loc,xlat_min_sai) |
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306 | theta_max = min(xlat(i)+dlat_loc,xlat_max_sai) |
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307 | IF ( xlat(i).GE.xlat_min_sai-dlat_loc .AND. xlat(i).LT.xlat_max_sai+dlat_loc .AND. & |
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308 | & xlon(i).GE.xlon_sai-dlon .AND. xlon(i).LT.xlon_sai+dlon ) THEN |
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309 | ! |
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310 | ! compute altLMDz |
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311 | altLMDz(:)=0.0 |
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312 | DO k=1, klev |
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313 | zrho=pplay(i,k)/t_seri(i,k)/RD !air density in kg/m3 |
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314 | zdm(k)=(paprs(i,k)-paprs(i,k+1))/RG !mass of layer in kg |
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315 | zdz=zdm(k)/zrho !thickness of layer in m |
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316 | altLMDz(k+1)=altLMDz(k)+zdz !altitude of interface |
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317 | ENDDO |
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318 | |
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319 | SELECT CASE(flag_sulf_emit_distrib) |
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320 | |
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321 | CASE(0) ! Gaussian distribution |
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322 | !compute distribution of emission to vertical model layers (based on |
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323 | !Gaussian peak in altitude) |
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324 | f_lay_sum=0.0 |
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325 | DO k=1, klev |
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326 | f_lay_emiss(k)=0.0 |
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327 | DO i_int=1, n_int_alt |
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328 | alt=altLMDz(k)+float(i_int)*(altLMDz(k+1)-altLMDz(k))/float(n_int_alt) |
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329 | f_lay_emiss(k)=f_lay_emiss(k)+1./(sqrt(2.*RPI)*sigma_alt_sai)* & |
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330 | & exp(-0.5*((alt-altemiss_sai)/sigma_alt_sai)**2.)* & |
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331 | & (altLMDz(k+1)-altLMDz(k))/float(n_int_alt) |
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332 | ENDDO |
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333 | f_lay_sum=f_lay_sum+f_lay_emiss(k) |
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334 | ENDDO |
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335 | |
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336 | CASE(1) ! Uniform distribution |
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337 | f_lay_sum=0.0 |
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338 | ! In this case, parameter sigma_alt_vol(ieru) is considered to be half |
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339 | ! the height of the injection, centered around altemiss_sai |
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340 | DO k=1, klev |
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341 | f_lay_emiss(k)=max(min(altemiss_sai+sigma_alt_sai,altLMDz(k+1))- & |
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342 | & max(altemiss_sai-sigma_alt_sai,altLMDz(k)),0.)/(2.*sigma_alt_sai) |
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343 | f_lay_sum=f_lay_sum+f_lay_emiss(k) |
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344 | ENDDO |
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345 | |
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346 | END SELECT ! Gaussian or uniform distribution |
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347 | |
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348 | !correct for step integration error |
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349 | f_lay_emiss(:)=f_lay_emiss(:)/f_lay_sum |
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350 | !emission as SO2 gas (with m(SO2)=64/32*m_aer_emiss) |
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351 | !vertically distributed emission |
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352 | DO k=1, klev |
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353 | ! stretch emission over whole year (360d) |
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354 | emission=m_aer_emiss_sai*(mSO2mol/mSatom)/m_air_gridbox(i,k)*f_lay_emiss(k)/ & |
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355 | & FLOAT(year_len)/86400.*(sin(theta_max/180.*RPI)-sin(theta_min/180.*RPI))/ & |
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356 | & (sin(xlat_max_sai/180.*RPI)-sin(xlat_min_sai/180.*RPI)) |
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357 | tr_seri(i,k,id_SO2_strat)=tr_seri(i,k,id_SO2_strat)+emission*pdtphys |
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358 | budg_emi_so2(i)=budg_emi_so2(i)+emission*zdm(k)*mSatom/mSO2mol |
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359 | ENDDO |
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360 | |
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361 | ! !emission as monodisperse particles with 0.1um dry radius (BIN21) |
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362 | ! !vertically distributed emission |
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363 | ! DO k=1, klev |
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364 | ! ! stretch emission over whole year (360d) |
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365 | ! emission=m_aer_emiss*(mH2SO4mol/mSatom)/m_part_dry(21)/m_air_gridbox(i,k)*f_lay_emiss(k)/year_len/86400 |
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366 | ! tr_seri(i,k,id_BIN01_strat+20)=tr_seri(i,k,id_BIN01_strat+20)+emission*pdtphys |
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367 | ! budg_emi_part(i)=budg_emi_part(i)+emission*zdm(k)*mSatom/mH2SO4mol |
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368 | ! ENDDO |
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369 | ENDIF ! emission grid cell |
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370 | ENDDO ! klon loop |
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371 | |
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372 | END SELECT ! emission scenario (flag_sulf_emit) |
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373 | |
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374 | !--read background concentrations of OCS and SO2 and lifetimes from input file |
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375 | !--update the variables defined in phys_local_var_mod |
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376 | CALL interp_sulf_input(debutphy,pdtphys,paprs,tr_seri) |
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377 | |
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378 | !--convert OCS to SO2 in the stratosphere |
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379 | CALL ocs_to_so2(pdtphys,tr_seri,t_seri,pplay,paprs,is_strato) |
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380 | |
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381 | !--convert SO2 to H2SO4 |
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382 | CALL so2_to_h2so4(pdtphys,tr_seri,t_seri,pplay,paprs,is_strato) |
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383 | |
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384 | !--common routine for nucleation and condensation/evaporation with adaptive timestep |
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385 | CALL micphy_tstep(pdtphys,tr_seri,t_seri,pplay,paprs,rh,is_strato) |
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386 | |
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387 | !--call coagulation routine |
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388 | CALL coagulate(pdtphys,mdw,tr_seri,t_seri,pplay,dens_aer,is_strato) |
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389 | |
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390 | !--call sedimentation routine |
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391 | CALL aer_sedimnt(pdtphys, t_seri, pplay, paprs, tr_seri, dens_aer) |
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392 | |
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393 | !--compute mass concentration of PM2.5 sulfate particles (wet diameter and mass) at the surface for health studies |
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394 | surf_PM25_sulf(:)=0.0 |
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395 | DO i=1,klon |
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396 | DO it=1, nbtr_bin |
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397 | IF (mdw(it) .LT. 2.5e-6) THEN |
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398 | !surf_PM25_sulf(i)=surf_PM25_sulf(i)+tr_seri(i,1,it+nbtr_sulgas)*m_part(i,1,it) & |
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399 | !assume that particles consist of ammonium sulfate at the surface (132g/mol) |
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400 | !and are dry at T = 20 deg. C and 50 perc. humidity |
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401 | surf_PM25_sulf(i)=surf_PM25_sulf(i)+tr_seri(i,1,it+nbtr_sulgas) & |
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402 | & *132./98.*dens_aer_dry*4./3.*RPI*(mdw(it)/2.)**3 & |
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403 | & *pplay(i,1)/t_seri(i,1)/RD*1.e9 |
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404 | ENDIF |
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405 | ENDDO |
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406 | ENDDO |
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407 | |
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408 | ! CALL minmaxsimple(tr_seri(:,:,id_SO2_strat),0.0,0.0,'fin SO2') |
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409 | ! DO it=1, nbtr_bin |
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410 | ! CALL minmaxsimple(tr_seri(:,:,nbtr_sulgas+it),0.0,0.0,'fin bin ') |
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411 | ! ENDDO |
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412 | |
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413 | END SUBROUTINE traccoag |
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414 | |
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415 | END MODULE traccoag_mod |
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