1 | !********************************************************************** |
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2 | ! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010 * |
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3 | ! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa, * |
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4 | ! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann * |
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5 | ! * |
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6 | ! This file is part of FLEXPART. * |
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7 | ! * |
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8 | ! FLEXPART is free software: you can redistribute it and/or modify * |
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9 | ! it under the terms of the GNU General Public License as published by* |
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10 | ! the Free Software Foundation, either version 3 of the License, or * |
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11 | ! (at your option) any later version. * |
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12 | ! * |
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13 | ! FLEXPART is distributed in the hope that it will be useful, * |
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14 | ! but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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15 | ! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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16 | ! GNU General Public License for more details. * |
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17 | ! * |
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18 | ! You should have received a copy of the GNU General Public License * |
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19 | ! along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
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20 | !********************************************************************** |
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21 | |
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22 | subroutine getvdep_nests(n,ix,jy,ust,temp,pa, & |
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23 | L,gr,rh,rr,snow,vdepo,lnest) |
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24 | ! i i i i i i i i i i i o i |
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25 | !***************************************************************************** |
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26 | ! * |
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27 | ! This routine calculates the dry deposition velocities. * |
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28 | ! * |
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29 | ! Author: A. Stohl * |
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30 | ! * |
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31 | ! 20 December 1996 * |
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32 | ! Sabine Eckhardt, Jan 07 * |
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33 | ! if the latitude is negative: add half a year to the julian day * |
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34 | ! * |
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35 | !***************************************************************************** |
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36 | ! * |
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37 | ! Variables: * |
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38 | ! gr [W/m2] global radiation * |
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39 | ! L [m] Obukhov length * |
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40 | ! nyl kinematic viscosity * |
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41 | ! pa [Pa] surface air pressure * |
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42 | ! ra [s/m] aerodynamic resistance * |
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43 | ! raquer [s/m] average aerodynamic resistance * |
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44 | ! rh [0-1] relative humidity * |
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45 | ! rhoa density of the air * |
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46 | ! rr [mm/h] precipitation rate * |
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47 | ! temp [K] 2m temperature * |
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48 | ! tc [C] 2m temperature * |
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49 | ! ust [m/s] friction velocity * |
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50 | ! snow [m of water equivalent] snow depth * |
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51 | ! xlanduse fractions of numclasS landuses for each model grid point * |
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52 | ! * |
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53 | !***************************************************************************** |
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54 | |
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55 | use par_mod |
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56 | use com_mod |
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57 | |
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58 | implicit none |
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59 | |
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60 | integer :: yyyymmdd,hhmmss,yyyy,mmdd,n,lseason,i,j,ix,jy,lnest |
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61 | real :: vdepo(maxspec),vd,rb(maxspec),rc(maxspec),raquer,ylat |
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62 | real :: raerod,ra,ust,temp,tc,pa,L,gr,rh,rr,myl,nyl,rhoa,diffh2o,snow |
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63 | real :: slanduse(numclass) |
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64 | real,parameter :: eps=1.e-5 |
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65 | real(kind=dp) :: jul |
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66 | |
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67 | ! Calculate month and determine the seasonal category |
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68 | !**************************************************** |
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69 | |
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70 | jul=bdate+real(wftime(n),kind=dp)/86400._dp |
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71 | |
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72 | ylat=jy*dy+ylat0 |
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73 | if (ylat.lt.0) then |
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74 | jul=jul+365/2 |
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75 | endif |
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76 | |
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77 | |
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78 | call caldate(jul,yyyymmdd,hhmmss) |
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79 | yyyy=yyyymmdd/10000 |
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80 | mmdd=yyyymmdd-10000*yyyy |
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81 | |
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82 | if ((ylat.gt.-20).and.(ylat.lt.20)) then |
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83 | mmdd=600 ! summer |
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84 | endif |
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85 | |
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86 | if ((mmdd.ge.1201).or.(mmdd.le.301)) then |
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87 | lseason=4 |
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88 | else if ((mmdd.ge.1101).or.(mmdd.le.331)) then |
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89 | lseason=3 |
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90 | else if ((mmdd.ge.401).and.(mmdd.le.515)) then |
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91 | lseason=5 |
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92 | else if ((mmdd.ge.516).and.(mmdd.le.915)) then |
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93 | lseason=1 |
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94 | else |
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95 | lseason=2 |
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96 | endif |
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97 | |
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98 | ! Calculate diffusivity of water vapor |
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99 | !************************************ |
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100 | diffh2o=2.11e-5*(temp/273.15)**1.94*(101325/pa) |
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101 | |
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102 | ! Conversion of temperature from K to C |
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103 | !************************************** |
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104 | |
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105 | tc=temp-273.15 |
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106 | |
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107 | ! Calculate dynamic viscosity |
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108 | !**************************** |
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109 | |
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110 | if (tc.lt.0) then |
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111 | myl=(1.718+0.0049*tc-1.2e-05*tc**2)*1.e-05 |
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112 | else |
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113 | myl=(1.718+0.0049*tc)*1.e-05 |
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114 | endif |
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115 | |
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116 | ! Calculate kinematic viscosity |
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117 | !****************************** |
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118 | |
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119 | rhoa=pa/(287.*temp) |
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120 | nyl=myl/rhoa |
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121 | |
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122 | |
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123 | ! 0. Set all deposition velocities zero |
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124 | !************************************** |
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125 | |
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126 | do i=1,nspec |
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127 | vdepo(i)=0. |
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128 | end do |
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129 | |
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130 | |
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131 | ! 1. Compute surface layer resistances rb |
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132 | !**************************************** |
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133 | |
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134 | call getrb(nspec,ust,nyl,diffh2o,reldiff,rb) |
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135 | |
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136 | ! change for snow |
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137 | do j=1,numclass |
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138 | if (snow.gt.0.001) then ! 10 mm |
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139 | if (j.eq.12) then |
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140 | slanduse(j)=1. |
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141 | else |
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142 | slanduse(j)=0. |
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143 | endif |
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144 | else |
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145 | slanduse(j)=xlandusen(ix,jy,j,lnest) |
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146 | endif |
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147 | end do |
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148 | |
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149 | raquer=0. |
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150 | do j=1,numclass ! loop over all landuse classes |
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151 | |
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152 | if (slanduse(j).gt.eps) then |
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153 | |
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154 | ! 2. Calculate aerodynamic resistance ra |
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155 | !*************************************** |
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156 | |
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157 | ra=raerod(L,ust,z0(j)) |
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158 | raquer=raquer+ra*slanduse(j) |
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159 | |
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160 | ! 3. Calculate surface resistance for gases |
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161 | !****************************************** |
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162 | |
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163 | call getrc(nspec,lseason,j,tc,gr,rh,rr,rc) |
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164 | |
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165 | ! 4. Calculate deposition velocities for gases and ... |
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166 | ! 5. ... sum deposition velocities for all landuse classes |
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167 | !********************************************************* |
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168 | |
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169 | do i=1,nspec |
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170 | if (reldiff(i).gt.0.) then |
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171 | if ((ra+rb(i)+rc(i)).gt.0.) then |
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172 | vd=1./(ra+rb(i)+rc(i)) |
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173 | ! XXXXXXXXXXXXXXXXXXXXXXXXXX TEST |
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174 | ! vd=1./rc(i) |
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175 | ! XXXXXXXXXXXXXXXXXXXXXXXXXX TEST |
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176 | else |
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177 | vd=9.999 |
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178 | endif |
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179 | vdepo(i)=vdepo(i)+vd*slanduse(j) |
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180 | endif |
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181 | end do |
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182 | endif |
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183 | end do |
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184 | |
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185 | |
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186 | ! 6. Calculate deposition velocities for particles |
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187 | !************************************************* |
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188 | |
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189 | call partdep(nspec,density,fract,schmi,vset,raquer,ust,nyl,vdepo) |
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190 | |
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191 | |
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192 | ! 7. If no detailed parameterization available, take constant deposition |
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193 | ! velocity if that is available |
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194 | !*********************************************************************** |
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195 | |
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196 | do i=1,nspec |
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197 | if ((reldiff(i).lt.0.).and.(density(i).lt.0.).and. & |
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198 | (dryvel(i).gt.0.)) then |
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199 | vdepo(i)=dryvel(i) |
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200 | endif |
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201 | end do |
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202 | |
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203 | |
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204 | end subroutine getvdep_nests |
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