1 | ! SPDX-FileCopyrightText: FLEXPART 1998-2019, see flexpart_license.txt |
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2 | ! SPDX-License-Identifier: GPL-3.0-or-later |
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3 | |
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4 | subroutine advance(itime,nrelpoint,ldt,up,vp,wp, & |
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5 | usigold,vsigold,wsigold,nstop,xt,yt,zt,prob,icbt) |
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6 | ! i i i/oi/oi/o |
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7 | ! i/o i/o i/o o i/oi/oi/o i/o i/o |
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8 | !***************************************************************************** |
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9 | ! * |
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10 | ! Calculation of turbulent particle trajectories utilizing a * |
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11 | ! zero-acceleration scheme, which is corrected by a numerically more * |
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12 | ! accurate Petterssen scheme whenever possible. * |
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13 | ! * |
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14 | ! Particle positions are read in, incremented, and returned to the calling * |
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15 | ! program. * |
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16 | ! * |
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17 | ! In different regions of the atmosphere (PBL vs. free troposphere), * |
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18 | ! different parameters are needed for advection, parameterizing turbulent * |
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19 | ! velocities, etc. For efficiency, different interpolation routines have * |
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20 | ! been written for these different cases, with the disadvantage that there * |
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21 | ! exist several routines doing almost the same. They all share the * |
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22 | ! included file 'interpol_mod'. The following * |
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23 | ! interpolation routines are used: * |
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24 | ! * |
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25 | ! interpol_all(_nests) interpolates everything (called inside the PBL) * |
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26 | ! interpol_misslev(_nests) if a particle moves vertically in the PBL, * |
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27 | ! additional parameters are interpolated if it * |
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28 | ! crosses a model level * |
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29 | ! interpol_wind(_nests) interpolates the wind and determines the * |
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30 | ! standard deviation of the wind (called outside * |
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31 | ! PBL) also interpolates potential vorticity * |
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32 | ! interpol_wind_short(_nests) only interpolates the wind (needed for the * |
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33 | ! Petterssen scheme) * |
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34 | ! interpol_vdep(_nests) interpolates deposition velocities * |
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35 | ! * |
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36 | ! * |
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37 | ! Author: A. Stohl * |
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38 | ! * |
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39 | ! 16 December 1997 * |
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40 | ! * |
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41 | ! Changes: * |
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42 | ! * |
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43 | ! 8 April 2000: Deep convection parameterization * |
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44 | ! * |
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45 | ! May 2002: Petterssen scheme introduced * |
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46 | ! * |
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47 | !***************************************************************************** |
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48 | ! * |
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49 | ! Variables: * |
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50 | ! icbt 1 if particle not transferred to forbidden state, * |
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51 | ! else -1 * |
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52 | ! dawsave accumulated displacement in along-wind direction * |
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53 | ! dcwsave accumulated displacement in cross-wind direction * |
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54 | ! dxsave accumulated displacement in longitude * |
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55 | ! dysave accumulated displacement in latitude * |
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56 | ! h [m] Mixing height * |
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57 | ! lwindinterv [s] time interval between two wind fields * |
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58 | ! itime [s] time at which this subroutine is entered * |
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59 | ! itimec [s] actual time, which is incremented in this subroutine * |
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60 | ! href [m] height for which dry deposition velocity is calculated * |
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61 | ! ladvance [s] Total integration time period * |
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62 | ! ldirect 1 forward, -1 backward * |
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63 | ! ldt [s] Time step for the next integration * |
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64 | ! lsynctime [s] Synchronisation interval of FLEXPART * |
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65 | ! ngrid index which grid is to be used * |
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66 | ! nrand index for a variable to be picked from rannumb * |
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67 | ! nstop if > 1 particle has left domain and must be stopped * |
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68 | ! prob probability of absorption due to dry deposition * |
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69 | ! rannumb(maxrand) normally distributed random variables * |
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70 | ! rhoa air density * |
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71 | ! rhograd vertical gradient of the air density * |
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72 | ! up,vp,wp random velocities due to turbulence (along wind, cross * |
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73 | ! wind, vertical wind * |
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74 | ! usig,vsig,wsig mesoscale wind fluctuations * |
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75 | ! usigold,vsigold,wsigold like usig, etc., but for the last time step * |
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76 | ! vdepo Deposition velocities for all species * |
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77 | ! xt,yt,zt Particle position * |
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78 | ! * |
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79 | !***************************************************************************** |
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80 | |
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81 | use point_mod |
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82 | use par_mod |
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83 | use com_mod |
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84 | use interpol_mod |
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85 | use hanna_mod |
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86 | use cmapf_mod |
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87 | use random_mod, only: ran3 |
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88 | |
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89 | implicit none |
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90 | |
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91 | real(kind=dp) :: xt,yt |
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92 | real :: zt,xts,yts,weight |
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93 | integer :: itime,itimec,nstop,ldt,i,j,k,nrand,loop,memindnext,mind |
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94 | integer :: ngr,nix,njy,ks,nsp,nrelpoint |
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95 | real :: dz,dz1,dz2,xlon,ylat,xpol,ypol,gridsize |
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96 | real :: ru,rv,rw,dt,ux,vy,cosfact,xtn,ytn,tropop |
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97 | real :: prob(maxspec),up,vp,wp,dxsave,dysave,dawsave |
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98 | real :: dcwsave |
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99 | real :: usigold,vsigold,wsigold,r,rs |
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100 | real :: uold,vold,wold,vdepo(maxspec) |
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101 | real :: h1(2) |
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102 | !real uprof(nzmax),vprof(nzmax),wprof(nzmax) |
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103 | !real usigprof(nzmax),vsigprof(nzmax),wsigprof(nzmax) |
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104 | !real rhoprof(nzmax),rhogradprof(nzmax) |
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105 | real :: rhoa,rhograd,delz,dtf,rhoaux,dtftlw,uxscale,wpscale |
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106 | integer(kind=2) :: icbt |
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107 | real,parameter :: eps=nxmax/3.e5,eps2=1.e-9,eps3=tiny(1.0) |
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108 | real :: ptot_lhh,Q_lhh,phi_lhh,ath,bth !modified by mc |
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109 | real :: old_wp_buf,dcas,dcas1,del_test !added by mc |
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110 | integer :: i_well,jj,flagrein !test well mixed: modified by mc |
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111 | |
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112 | |
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113 | !!! CHANGE: TEST OF THE WELL-MIXED CRITERION |
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114 | ! integer,parameter :: iclass=10 |
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115 | ! real(kind=dp) :: zacc,tacc,t(iclass),th(0:iclass),hsave |
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116 | ! logical dump |
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117 | ! save zacc,tacc,t,th,hsave,dump |
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118 | !!! CHANGE |
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119 | |
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120 | integer :: idummy = -7 |
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121 | real :: settling = 0. |
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122 | |
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123 | |
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124 | !!! CHANGE: TEST OF THE WELL-MIXED CRITERION |
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125 | !if (idummy.eq.-7) then |
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126 | !open(550,file='WELLMIXEDTEST') |
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127 | !do 17 i=0,iclass |
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128 | !7 th(i)=real(i)/real(iclass) |
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129 | !endif |
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130 | !!! CHANGE |
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131 | |
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132 | |
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133 | nstop=0 |
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134 | do i=1,nmixz |
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135 | indzindicator(i)=.true. |
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136 | end do |
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137 | |
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138 | |
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139 | if (DRYDEP) then ! reset probability for deposition |
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140 | do ks=1,nspec |
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141 | depoindicator(ks)=.true. |
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142 | prob(ks)=0. |
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143 | end do |
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144 | endif |
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145 | |
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146 | dxsave=0. ! reset position displacements |
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147 | dysave=0. ! due to mean wind |
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148 | dawsave=0. ! and turbulent wind |
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149 | dcwsave=0. |
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150 | |
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151 | itimec=itime |
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152 | |
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153 | nrand=int(ran3(idummy)*real(maxrand-1))+1 |
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154 | |
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155 | |
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156 | ! Determine whether lat/long grid or polarstereographic projection |
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157 | ! is to be used |
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158 | ! Furthermore, determine which nesting level to be used |
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159 | !***************************************************************** |
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160 | |
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161 | if (nglobal.and.(yt.gt.switchnorthg)) then |
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162 | ngrid=-1 |
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163 | else if (sglobal.and.(yt.lt.switchsouthg)) then |
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164 | ngrid=-2 |
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165 | else |
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166 | ngrid=0 |
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167 | do j=numbnests,1,-1 |
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168 | if ((xt.gt.xln(j)+eps).and.(xt.lt.xrn(j)-eps).and. & |
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169 | (yt.gt.yln(j)+eps).and.(yt.lt.yrn(j)-eps)) then |
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170 | ngrid=j |
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171 | goto 23 |
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172 | endif |
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173 | end do |
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174 | 23 continue |
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175 | endif |
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176 | |
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177 | |
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178 | !*************************** |
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179 | ! Interpolate necessary data |
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180 | !*************************** |
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181 | |
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182 | if (abs(itime-memtime(1)).lt.abs(itime-memtime(2))) then |
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183 | memindnext=1 |
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184 | else |
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185 | memindnext=2 |
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186 | endif |
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187 | |
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188 | ! Determine nested grid coordinates |
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189 | !********************************** |
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190 | |
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191 | if (ngrid.gt.0) then |
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192 | xtn=(xt-xln(ngrid))*xresoln(ngrid) |
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193 | ytn=(yt-yln(ngrid))*yresoln(ngrid) |
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194 | ix=int(xtn) |
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195 | jy=int(ytn) |
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196 | nix=nint(xtn) |
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197 | njy=nint(ytn) |
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198 | else |
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199 | ix=int(xt) |
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200 | jy=int(yt) |
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201 | nix=nint(xt) |
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202 | njy=nint(yt) |
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203 | endif |
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204 | ixp=ix+1 |
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205 | jyp=jy+1 |
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206 | |
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207 | |
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208 | ! Determine the lower left corner and its distance to the current position |
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209 | !************************************************************************* |
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210 | |
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211 | ddx=xt-real(ix) |
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212 | ddy=yt-real(jy) |
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213 | rddx=1.-ddx |
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214 | rddy=1.-ddy |
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215 | p1=rddx*rddy |
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216 | p2=ddx*rddy |
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217 | p3=rddx*ddy |
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218 | p4=ddx*ddy |
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219 | |
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220 | ! Calculate variables for time interpolation |
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221 | !******************************************* |
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222 | |
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223 | dt1=real(itime-memtime(1)) |
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224 | dt2=real(memtime(2)-itime) |
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225 | dtt=1./(dt1+dt2) |
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226 | |
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227 | ! eso: Temporary fix for particle exactly at north pole |
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228 | if (jyp >= nymax) then |
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229 | ! write(*,*) 'WARNING: advance.f90 jyp >= nymax. xt,yt:',xt,yt |
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230 | jyp=jyp-1 |
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231 | end if |
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232 | |
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233 | ! Compute maximum mixing height around particle position |
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234 | !******************************************************* |
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235 | |
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236 | h=0. |
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237 | if (ngrid.le.0) then |
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238 | do k=1,2 |
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239 | mind=memind(k) ! eso: compatibility with 3-field version |
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240 | if (interpolhmix) then |
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241 | h1(k)=p1*hmix(ix ,jy ,1,mind) & |
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242 | + p2*hmix(ixp,jy ,1,mind) & |
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243 | + p3*hmix(ix ,jyp,1,mind) & |
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244 | + p4*hmix(ixp,jyp,1,mind) |
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245 | else |
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246 | do j=jy,jyp |
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247 | do i=ix,ixp |
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248 | if (hmix(i,j,1,mind).gt.h) h=hmix(i,j,1,mind) |
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249 | end do |
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250 | end do |
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251 | endif |
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252 | end do |
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253 | tropop=tropopause(nix,njy,1,1) |
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254 | else |
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255 | do k=1,2 |
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256 | mind=memind(k) |
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257 | do j=jy,jyp |
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258 | do i=ix,ixp |
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259 | if (hmixn(i,j,1,mind,ngrid).gt.h) h=hmixn(i,j,1,mind,ngrid) |
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260 | end do |
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261 | end do |
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262 | end do |
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263 | tropop=tropopausen(nix,njy,1,1,ngrid) |
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264 | endif |
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265 | |
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266 | if (interpolhmix) h=(h1(1)*dt2+h1(2)*dt1)*dtt |
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267 | zeta=zt/h |
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268 | |
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269 | |
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270 | |
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271 | !************************************************************* |
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272 | ! If particle is in the PBL, interpolate once and then make a |
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273 | ! time loop until end of interval is reached |
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274 | !************************************************************* |
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275 | |
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276 | if (zeta.le.1.) then |
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277 | |
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278 | ! BEGIN TIME LOOP |
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279 | !================ |
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280 | |
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281 | loop=0 |
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282 | 100 loop=loop+1 |
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283 | if (method.eq.1) then |
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284 | ldt=min(ldt,abs(lsynctime-itimec+itime)) |
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285 | itimec=itimec+ldt*ldirect |
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286 | else |
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287 | ldt=abs(lsynctime) |
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288 | itimec=itime+lsynctime |
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289 | endif |
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290 | dt=real(ldt) |
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291 | |
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292 | zeta=zt/h |
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293 | |
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294 | |
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295 | if (loop.eq.1) then |
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296 | if (ngrid.le.0) then |
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297 | xts=real(xt) |
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298 | yts=real(yt) |
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299 | call interpol_all(itime,xts,yts,zt) |
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300 | else |
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301 | call interpol_all_nests(itime,xtn,ytn,zt) |
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302 | endif |
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303 | |
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304 | else |
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305 | |
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306 | |
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307 | ! Determine the level below the current position for u,v,rho |
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308 | !*********************************************************** |
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309 | |
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310 | do i=2,nz |
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311 | if (height(i).gt.zt) then |
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312 | indz=i-1 |
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313 | indzp=i |
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314 | goto 6 |
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315 | endif |
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316 | end do |
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317 | 6 continue |
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318 | |
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319 | ! If one of the levels necessary is not yet available, |
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320 | ! calculate it |
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321 | !***************************************************** |
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322 | |
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323 | do i=indz,indzp |
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324 | if (indzindicator(i)) then |
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325 | if (ngrid.le.0) then |
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326 | call interpol_misslev(i) |
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327 | else |
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328 | call interpol_misslev_nests(i) |
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329 | endif |
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330 | endif |
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331 | end do |
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332 | endif |
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333 | |
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334 | |
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335 | ! Vertical interpolation of u,v,w,rho and drhodz |
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336 | !*********************************************** |
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337 | |
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338 | ! Vertical distance to the level below and above current position |
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339 | ! both in terms of (u,v) and (w) fields |
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340 | !**************************************************************** |
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341 | |
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342 | dz=1./(height(indzp)-height(indz)) |
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343 | dz1=(zt-height(indz))*dz |
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344 | dz2=(height(indzp)-zt)*dz |
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345 | |
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346 | u=dz1*uprof(indzp)+dz2*uprof(indz) |
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347 | v=dz1*vprof(indzp)+dz2*vprof(indz) |
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348 | w=dz1*wprof(indzp)+dz2*wprof(indz) |
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349 | rhoa=dz1*rhoprof(indzp)+dz2*rhoprof(indz) |
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350 | rhograd=dz1*rhogradprof(indzp)+dz2*rhogradprof(indz) |
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351 | |
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352 | |
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353 | ! Compute the turbulent disturbances |
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354 | ! Determine the sigmas and the timescales |
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355 | !**************************************** |
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356 | |
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357 | if (turbswitch) then |
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358 | call hanna(zt) |
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359 | else |
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360 | call hanna1(zt) |
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361 | endif |
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362 | |
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363 | |
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364 | !***************************************** |
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365 | ! Determine the new diffusivity velocities |
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366 | !***************************************** |
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367 | |
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368 | ! Horizontal components |
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369 | !********************** |
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370 | |
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371 | if (nrand+1.gt.maxrand) nrand=1 |
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372 | if (dt/tlu.lt..5) then |
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373 | up=(1.-dt/tlu)*up+rannumb(nrand)*sigu*sqrt(2.*dt/tlu) |
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374 | else |
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375 | ru=exp(-dt/tlu) |
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376 | up=ru*up+rannumb(nrand)*sigu*sqrt(1.-ru**2) |
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377 | endif |
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378 | if (dt/tlv.lt..5) then |
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379 | vp=(1.-dt/tlv)*vp+rannumb(nrand+1)*sigv*sqrt(2.*dt/tlv) |
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380 | else |
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381 | rv=exp(-dt/tlv) |
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382 | vp=rv*vp+rannumb(nrand+1)*sigv*sqrt(1.-rv**2) |
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383 | endif |
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384 | nrand=nrand+2 |
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385 | |
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386 | |
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387 | if (nrand+ifine.gt.maxrand) nrand=1 |
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388 | rhoaux=rhograd/rhoa |
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389 | dtf=dt*fine |
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390 | |
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391 | dtftlw=dtf/tlw |
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392 | |
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393 | ! Loop over ifine short time steps for vertical component |
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394 | !******************************************************** |
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395 | |
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396 | do i=1,ifine |
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397 | |
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398 | ! Determine the drift velocity and density correction velocity |
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399 | !************************************************************* |
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400 | |
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401 | if (turbswitch) then |
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402 | if (dtftlw.lt..5) then |
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403 | !************************************************************* |
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404 | !************** CBL options added by mc see routine cblf90 *** |
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405 | if (cblflag.eq.1) then !modified by mc |
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406 | if (-h/ol.gt.5) then !modified by mc |
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407 | !if (ol.lt.0.) then !modified by mc |
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408 | !if (ol.gt.0.) then !modified by mc : for test |
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409 | !print *,zt,wp,ath,bth,tlw,dtf,'prima' |
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410 | flagrein=0 |
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411 | nrand=nrand+1 |
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412 | old_wp_buf=wp |
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413 | call cbl(wp,zt,ust,wst,h,rhoa,rhograd,sigw,dsigwdz,tlw,ptot_lhh,Q_lhh,phi_lhh,ath,bth,ol,flagrein) !inside the routine for inverse time |
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414 | wp=(wp+ath*dtf+bth*rannumb(nrand)*sqrt(dtf))*real(icbt) |
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415 | ! wp=(wp+ath*dtf+bth*gasdev2(mydum)*sqrt(dtf))*real(icbt) |
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416 | delz=wp*dtf |
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417 | if (flagrein.eq.1) then |
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418 | call re_initialize_particle(zt,ust,wst,h,sigw,old_wp_buf,nrand,ol) |
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419 | wp=old_wp_buf |
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420 | delz=wp*dtf |
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421 | nan_count=nan_count+1 |
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422 | end if |
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423 | !print *,zt,wp,ath,bth,tlw,dtf,rannumb(nrand+i),icbt |
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424 | !pause |
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425 | else |
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426 | nrand=nrand+1 |
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427 | old_wp_buf=wp |
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428 | ath=-wp/tlw+sigw*dsigwdz+wp*wp/sigw*dsigwdz+sigw*sigw/rhoa*rhograd !1-note for inverse time should be -wp/tlw*ldirect+... calculated for wp=-wp |
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429 | !2-but since ldirect =-1 for inverse time and this must be calculated for (-wp) and |
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430 | !3-the gaussian pdf is symmetric (i.e. pdf(w)=pdf(-w) ldirect can be discarded |
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431 | bth=sigw*rannumb(nrand)*sqrt(2.*dtftlw) |
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432 | wp=(wp+ath*dtf+bth)*real(icbt) |
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433 | delz=wp*dtf |
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434 | del_test=(1.-wp)/wp !catch infinity value |
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435 | if (isnan(wp).or.isnan(del_test)) then |
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436 | nrand=nrand+1 |
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437 | wp=sigw*rannumb(nrand) |
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438 | delz=wp*dtf |
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439 | nan_count2=nan_count2+1 |
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440 | !print *,'NaN coutner equal to:', nan_count,'reduce ifine if this number became a non-negligible fraction of the particle number' |
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441 | end if |
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442 | end if |
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443 | !******************** END CBL option ******************************* |
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444 | !******************************************************************* |
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445 | else |
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446 | wp=((1.-dtftlw)*wp+rannumb(nrand+i)*sqrt(2.*dtftlw) & |
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447 | +dtf*(dsigwdz+rhoaux*sigw))*real(icbt) |
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448 | delz=wp*sigw*dtf |
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449 | end if |
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450 | else |
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451 | rw=exp(-dtftlw) |
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452 | wp=(rw*wp+rannumb(nrand+i)*sqrt(1.-rw**2) & |
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453 | +tlw*(1.-rw)*(dsigwdz+rhoaux*sigw))*real(icbt) |
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454 | delz=wp*sigw*dtf |
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455 | endif |
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456 | |
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457 | else |
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458 | rw=exp(-dtftlw) |
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459 | wp=(rw*wp+rannumb(nrand+i)*sqrt(1.-rw**2)*sigw & |
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460 | +tlw*(1.-rw)*(dsigw2dz+rhoaux*sigw**2))*real(icbt) |
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461 | delz=wp*dtf |
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462 | endif |
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463 | |
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464 | if (turboff) then |
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465 | !sec switch off turbulence |
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466 | up=0.0 |
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467 | vp=0.0 |
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468 | wp=0.0 |
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469 | delz=0. |
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470 | endif |
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471 | |
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472 | !**************************************************** |
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473 | ! Compute turbulent vertical displacement of particle |
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474 | !**************************************************** |
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475 | |
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476 | if (abs(delz).gt.h) delz=mod(delz,h) |
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477 | |
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478 | ! Determine if particle transfers to a "forbidden state" below the ground |
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479 | ! or above the mixing height |
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480 | !************************************************************************ |
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481 | |
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482 | if (delz.lt.-zt) then ! reflection at ground |
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483 | icbt=-1 |
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484 | zt=-zt-delz |
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485 | else if (delz.gt.(h-zt)) then ! reflection at h |
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486 | icbt=-1 |
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487 | zt=-zt-delz+2.*h |
---|
488 | else ! no reflection |
---|
489 | icbt=1 |
---|
490 | zt=zt+delz |
---|
491 | endif |
---|
492 | |
---|
493 | if (i.ne.ifine) then |
---|
494 | zeta=zt/h |
---|
495 | call hanna_short(zt) |
---|
496 | endif |
---|
497 | |
---|
498 | end do |
---|
499 | if (cblflag.ne.1) nrand=nrand+i |
---|
500 | |
---|
501 | ! Determine time step for next integration |
---|
502 | !***************************************** |
---|
503 | |
---|
504 | if (turbswitch) then |
---|
505 | ldt=int(min(tlw,h/max(2.*abs(wp*sigw),1.e-5), & |
---|
506 | 0.5/abs(dsigwdz))*ctl) |
---|
507 | else |
---|
508 | ldt=int(min(tlw,h/max(2.*abs(wp),1.e-5))*ctl) |
---|
509 | endif |
---|
510 | ldt=max(ldt,mintime) |
---|
511 | |
---|
512 | |
---|
513 | ! If particle represents only a single species, add gravitational settling |
---|
514 | ! velocity. The settling velocity is zero for gases, or if particle |
---|
515 | ! represents more than one species |
---|
516 | !************************************************************************* |
---|
517 | |
---|
518 | if (mdomainfill.eq.0) then |
---|
519 | if (lsettling) then |
---|
520 | do nsp=1,nspec |
---|
521 | if (xmass(nrelpoint,nsp).gt.eps3) exit |
---|
522 | end do |
---|
523 | if (nsp.gt.nspec) then |
---|
524 | nsp=nspec |
---|
525 | end if |
---|
526 | if (density(nsp).gt.0.) then |
---|
527 | call get_settling(itime,real(xt),real(yt),zt,nsp,settling) !bugfix |
---|
528 | w=w+settling |
---|
529 | end if |
---|
530 | end if |
---|
531 | endif |
---|
532 | |
---|
533 | ! Horizontal displacements during time step dt are small real values compared |
---|
534 | ! to the position; adding the two, would result in large numerical errors. |
---|
535 | ! Thus, displacements are accumulated during lsynctime and are added to the |
---|
536 | ! position at the end |
---|
537 | !**************************************************************************** |
---|
538 | |
---|
539 | dxsave=dxsave+u*dt |
---|
540 | dysave=dysave+v*dt |
---|
541 | dawsave=dawsave+up*dt |
---|
542 | dcwsave=dcwsave+vp*dt |
---|
543 | zt=zt+w*dt*real(ldirect) |
---|
544 | |
---|
545 | ! HSO/AL: Particle managed to go over highest level -> interpolation error in goto 700 |
---|
546 | ! alias interpol_wind (division by zero) |
---|
547 | if (zt.ge.height(nz)) zt=height(nz)-100.*eps |
---|
548 | |
---|
549 | if (zt.gt.h) then |
---|
550 | if (itimec.eq.itime+lsynctime) goto 99 |
---|
551 | goto 700 ! complete the current interval above PBL |
---|
552 | endif |
---|
553 | |
---|
554 | |
---|
555 | !!! CHANGE: TEST OF THE WELL-MIXED CRITERION |
---|
556 | !!! These lines may be switched on to test the well-mixed criterion |
---|
557 | !if (zt.le.h) then |
---|
558 | ! zacc=zacc+zt/h*dt |
---|
559 | ! hsave=hsave+h*dt |
---|
560 | ! tacc=tacc+dt |
---|
561 | ! do 67 i=1,iclass |
---|
562 | ! if ((zt/h.gt.th(i-1)).and.(zt/h.le.th(i))) |
---|
563 | ! + t(i)=t(i)+dt |
---|
564 | !7 continue |
---|
565 | !endif |
---|
566 | !if ((mod(itime,10800).eq.0).and.dump) then |
---|
567 | ! dump=.false. |
---|
568 | ! write(550,'(i6,12f10.3)') itime,hsave/tacc,zacc/tacc, |
---|
569 | ! + (t(i)/tacc*real(iclass),i=1,iclass) |
---|
570 | ! zacc=0. |
---|
571 | ! tacc=0. |
---|
572 | ! do 68 i=1,iclass |
---|
573 | !8 t(i)=0. |
---|
574 | ! hsave=0. |
---|
575 | !endif |
---|
576 | !if (mod(itime,10800).ne.0) dump=.true. |
---|
577 | !!! CHANGE |
---|
578 | |
---|
579 | ! Determine probability of deposition |
---|
580 | !************************************ |
---|
581 | |
---|
582 | if ((DRYDEP).and.(zt.lt.2.*href)) then |
---|
583 | do ks=1,nspec |
---|
584 | if (DRYDEPSPEC(ks)) then |
---|
585 | if (depoindicator(ks)) then |
---|
586 | if (ngrid.le.0) then |
---|
587 | call interpol_vdep(ks,vdepo(ks)) |
---|
588 | else |
---|
589 | call interpol_vdep_nests(ks,vdepo(ks)) |
---|
590 | endif |
---|
591 | endif |
---|
592 | ! correction by Petra Seibert, 10 April 2001 |
---|
593 | ! this formulation means that prob(n) = 1 - f(0)*...*f(n) |
---|
594 | ! where f(n) is the exponential term |
---|
595 | prob(ks)=1.+(prob(ks)-1.)* & |
---|
596 | exp(-vdepo(ks)*abs(dt)/(2.*href)) |
---|
597 | endif |
---|
598 | end do |
---|
599 | endif |
---|
600 | |
---|
601 | if (zt.lt.0.) zt=min(h-eps2,-1.*zt) ! if particle below ground -> reflection |
---|
602 | |
---|
603 | if (itimec.eq.(itime+lsynctime)) then |
---|
604 | usig=0.5*(usigprof(indzp)+usigprof(indz)) |
---|
605 | vsig=0.5*(vsigprof(indzp)+vsigprof(indz)) |
---|
606 | wsig=0.5*(wsigprof(indzp)+wsigprof(indz)) |
---|
607 | goto 99 ! finished |
---|
608 | endif |
---|
609 | goto 100 |
---|
610 | |
---|
611 | ! END TIME LOOP |
---|
612 | !============== |
---|
613 | |
---|
614 | |
---|
615 | endif |
---|
616 | |
---|
617 | |
---|
618 | |
---|
619 | !********************************************************** |
---|
620 | ! For all particles that are outside the PBL, make a single |
---|
621 | ! time step. Only horizontal turbulent disturbances are |
---|
622 | ! calculated. Vertical disturbances are reset. |
---|
623 | !********************************************************** |
---|
624 | |
---|
625 | |
---|
626 | ! Interpolate the wind |
---|
627 | !********************* |
---|
628 | |
---|
629 | 700 continue |
---|
630 | if (ngrid.le.0) then |
---|
631 | xts=real(xt) |
---|
632 | yts=real(yt) |
---|
633 | call interpol_wind(itime,xts,yts,zt) |
---|
634 | else |
---|
635 | call interpol_wind_nests(itime,xtn,ytn,zt) |
---|
636 | endif |
---|
637 | |
---|
638 | |
---|
639 | ! Compute everything for above the PBL |
---|
640 | |
---|
641 | ! Assume constant, uncorrelated, turbulent perturbations |
---|
642 | ! In the stratosphere, use a small vertical diffusivity d_strat, |
---|
643 | ! in the troposphere, use a larger horizontal diffusivity d_trop. |
---|
644 | ! Turbulent velocity scales are determined based on sqrt(d_trop/dt) |
---|
645 | !****************************************************************** |
---|
646 | |
---|
647 | ldt=abs(lsynctime-itimec+itime) |
---|
648 | dt=real(ldt) |
---|
649 | |
---|
650 | if (zt.lt.tropop) then ! in the troposphere |
---|
651 | uxscale=sqrt(2.*d_trop/dt) |
---|
652 | if (nrand+1.gt.maxrand) nrand=1 |
---|
653 | ux=rannumb(nrand)*uxscale |
---|
654 | vy=rannumb(nrand+1)*uxscale |
---|
655 | nrand=nrand+2 |
---|
656 | wp=0. |
---|
657 | else if (zt.lt.tropop+1000.) then ! just above the tropopause: make transition |
---|
658 | weight=(zt-tropop)/1000. |
---|
659 | uxscale=sqrt(2.*d_trop/dt*(1.-weight)) |
---|
660 | if (nrand+2.gt.maxrand) nrand=1 |
---|
661 | ux=rannumb(nrand)*uxscale |
---|
662 | vy=rannumb(nrand+1)*uxscale |
---|
663 | wpscale=sqrt(2.*d_strat/dt*weight) |
---|
664 | wp=rannumb(nrand+2)*wpscale+d_strat/1000. |
---|
665 | nrand=nrand+3 |
---|
666 | else ! in the stratosphere |
---|
667 | if (nrand.gt.maxrand) nrand=1 |
---|
668 | ux=0. |
---|
669 | vy=0. |
---|
670 | wpscale=sqrt(2.*d_strat/dt) |
---|
671 | wp=rannumb(nrand)*wpscale |
---|
672 | nrand=nrand+1 |
---|
673 | endif |
---|
674 | |
---|
675 | if (turboff) then |
---|
676 | !sec switch off turbulence |
---|
677 | ux=0.0 |
---|
678 | vy=0.0 |
---|
679 | wp=0.0 |
---|
680 | endif |
---|
681 | |
---|
682 | ! If particle represents only a single species, add gravitational settling |
---|
683 | ! velocity. The settling velocity is zero for gases |
---|
684 | !************************************************************************* |
---|
685 | |
---|
686 | if (mdomainfill.eq.0) then |
---|
687 | if (lsettling) then |
---|
688 | do nsp=1,nspec |
---|
689 | if (xmass(nrelpoint,nsp).gt.eps3) exit |
---|
690 | end do |
---|
691 | if (nsp.gt.nspec) then |
---|
692 | nsp=nspec |
---|
693 | end if |
---|
694 | if (density(nsp).gt.0.) then |
---|
695 | call get_settling(itime,real(xt),real(yt),zt,nsp,settling) !bugfix |
---|
696 | w=w+settling |
---|
697 | end if |
---|
698 | endif |
---|
699 | end if |
---|
700 | |
---|
701 | |
---|
702 | ! Calculate position at time step itime+lsynctime |
---|
703 | !************************************************ |
---|
704 | |
---|
705 | dxsave=dxsave+(u+ux)*dt |
---|
706 | dysave=dysave+(v+vy)*dt |
---|
707 | zt=zt+(w+wp)*dt*real(ldirect) |
---|
708 | if (zt.lt.0.) zt=min(h-eps2,-1.*zt) ! if particle below ground -> reflection |
---|
709 | |
---|
710 | 99 continue |
---|
711 | |
---|
712 | |
---|
713 | |
---|
714 | !**************************************************************** |
---|
715 | ! Add mesoscale random disturbances |
---|
716 | ! This is done only once for the whole lsynctime interval to save |
---|
717 | ! computation time |
---|
718 | !**************************************************************** |
---|
719 | |
---|
720 | |
---|
721 | ! Mesoscale wind velocity fluctuations are obtained by scaling |
---|
722 | ! with the standard deviation of the grid-scale winds surrounding |
---|
723 | ! the particle location, multiplied by a factor turbmesoscale. |
---|
724 | ! The autocorrelation time constant is taken as half the |
---|
725 | ! time interval between wind fields |
---|
726 | !**************************************************************** |
---|
727 | |
---|
728 | r=exp(-2.*real(abs(lsynctime))/real(lwindinterv)) |
---|
729 | rs=sqrt(1.-r**2) |
---|
730 | if (nrand+2.gt.maxrand) nrand=1 |
---|
731 | usigold=r*usigold+rs*rannumb(nrand)*usig*turbmesoscale |
---|
732 | vsigold=r*vsigold+rs*rannumb(nrand+1)*vsig*turbmesoscale |
---|
733 | wsigold=r*wsigold+rs*rannumb(nrand+2)*wsig*turbmesoscale |
---|
734 | |
---|
735 | dxsave=dxsave+usigold*real(lsynctime) |
---|
736 | dysave=dysave+vsigold*real(lsynctime) |
---|
737 | |
---|
738 | zt=zt+wsigold*real(lsynctime) |
---|
739 | if (zt.lt.0.) zt=-1.*zt ! if particle below ground -> refletion |
---|
740 | |
---|
741 | !************************************************************* |
---|
742 | ! Transform along and cross wind components to xy coordinates, |
---|
743 | ! add them to u and v, transform u,v to grid units/second |
---|
744 | ! and calculate new position |
---|
745 | !************************************************************* |
---|
746 | |
---|
747 | call windalign(dxsave,dysave,dawsave,dcwsave,ux,vy) |
---|
748 | dxsave=dxsave+ux ! comment by mc: comment this line to stop the particles horizontally for test reasons |
---|
749 | dysave=dysave+vy |
---|
750 | if (ngrid.ge.0) then |
---|
751 | cosfact=dxconst/cos((yt*dy+ylat0)*pi180) |
---|
752 | xt=xt+real(dxsave*cosfact*real(ldirect),kind=dp) |
---|
753 | yt=yt+real(dysave*dyconst*real(ldirect),kind=dp) |
---|
754 | else if (ngrid.eq.-1) then ! around north pole |
---|
755 | xlon=xlon0+xt*dx !comment by mc: compute old particle position |
---|
756 | ylat=ylat0+yt*dy |
---|
757 | call cll2xy(northpolemap,ylat,xlon,xpol,ypol) !convert old particle position in polar stereographic |
---|
758 | gridsize=1000.*cgszll(northpolemap,ylat,xlon) !calculate size in m of grid element in polar stereographic coordinate |
---|
759 | dxsave=dxsave/gridsize !increment from meter to grdi unit |
---|
760 | dysave=dysave/gridsize |
---|
761 | xpol=xpol+dxsave*real(ldirect) !position in grid unit polar stereographic |
---|
762 | ypol=ypol+dysave*real(ldirect) |
---|
763 | call cxy2ll(northpolemap,xpol,ypol,ylat,xlon) !convert to lat long coordinate |
---|
764 | xt=(xlon-xlon0)/dx !convert to grid units in lat long coordinate, comment by mc |
---|
765 | yt=(ylat-ylat0)/dy |
---|
766 | else if (ngrid.eq.-2) then ! around south pole |
---|
767 | xlon=xlon0+xt*dx |
---|
768 | ylat=ylat0+yt*dy |
---|
769 | call cll2xy(southpolemap,ylat,xlon,xpol,ypol) |
---|
770 | gridsize=1000.*cgszll(southpolemap,ylat,xlon) |
---|
771 | dxsave=dxsave/gridsize |
---|
772 | dysave=dysave/gridsize |
---|
773 | xpol=xpol+dxsave*real(ldirect) |
---|
774 | ypol=ypol+dysave*real(ldirect) |
---|
775 | call cxy2ll(southpolemap,xpol,ypol,ylat,xlon) |
---|
776 | xt=(xlon-xlon0)/dx |
---|
777 | yt=(ylat-ylat0)/dy |
---|
778 | endif |
---|
779 | |
---|
780 | |
---|
781 | ! If global data are available, use cyclic boundary condition |
---|
782 | !************************************************************ |
---|
783 | |
---|
784 | if (xglobal) then |
---|
785 | if (xt.ge.real(nxmin1)) xt=xt-real(nxmin1) |
---|
786 | if (xt.lt.0.) xt=xt+real(nxmin1) |
---|
787 | if (xt.le.eps) xt=eps |
---|
788 | if (abs(xt-real(nxmin1)).le.eps) xt=real(nxmin1)-eps |
---|
789 | endif |
---|
790 | |
---|
791 | ! HSO/AL: Prevent particles from disappearing at the pole |
---|
792 | !****************************************************************** |
---|
793 | |
---|
794 | if ( yt.lt.0. ) then |
---|
795 | xt=mod(xt+180.,360.) |
---|
796 | yt=-yt |
---|
797 | else if ( yt.gt.real(nymin1) ) then |
---|
798 | xt=mod(xt+180.,360.) |
---|
799 | yt=2*real(nymin1)-yt |
---|
800 | endif |
---|
801 | |
---|
802 | ! Check position: If trajectory outside model domain, terminate it |
---|
803 | !***************************************************************** |
---|
804 | |
---|
805 | if ((xt.lt.0.).or.(xt.ge.real(nxmin1)).or.(yt.lt.0.).or. & |
---|
806 | (yt.gt.real(nymin1))) then |
---|
807 | nstop=3 |
---|
808 | return |
---|
809 | endif |
---|
810 | |
---|
811 | ! If particle above highest model level, set it back into the domain |
---|
812 | !******************************************************************* |
---|
813 | |
---|
814 | if (zt.ge.height(nz)) zt=height(nz)-100.*eps |
---|
815 | |
---|
816 | |
---|
817 | !************************************************************************ |
---|
818 | ! Now we could finish, as this was done in FLEXPART versions up to 4.0. |
---|
819 | ! However, truncation errors of the advection can be significantly |
---|
820 | ! reduced by doing one iteration of the Petterssen scheme, if this is |
---|
821 | ! possible. |
---|
822 | ! Note that this is applied only to the grid-scale winds, not to |
---|
823 | ! the turbulent winds. |
---|
824 | !************************************************************************ |
---|
825 | |
---|
826 | ! The Petterssen scheme can only applied with long time steps (only then u |
---|
827 | ! is the "old" wind as required by the scheme); otherwise do nothing |
---|
828 | !************************************************************************* |
---|
829 | |
---|
830 | if (ldt.ne.abs(lsynctime)) return |
---|
831 | |
---|
832 | ! The Petterssen scheme can only be applied if the ending time of the time step |
---|
833 | ! (itime+ldt*ldirect) is still between the two wind fields held in memory; |
---|
834 | ! otherwise do nothing |
---|
835 | !****************************************************************************** |
---|
836 | |
---|
837 | if (abs(itime+ldt*ldirect).gt.abs(memtime(2))) return |
---|
838 | |
---|
839 | ! Apply it also only if starting and ending point of current time step are on |
---|
840 | ! the same grid; otherwise do nothing |
---|
841 | !***************************************************************************** |
---|
842 | if (nglobal.and.(yt.gt.switchnorthg)) then |
---|
843 | ngr=-1 |
---|
844 | else if (sglobal.and.(yt.lt.switchsouthg)) then |
---|
845 | ngr=-2 |
---|
846 | else |
---|
847 | ngr=0 |
---|
848 | do j=numbnests,1,-1 |
---|
849 | if ((xt.gt.xln(j)+eps).and.(xt.lt.xrn(j)-eps).and. & |
---|
850 | (yt.gt.yln(j)+eps).and.(yt.lt.yrn(j)-eps)) then |
---|
851 | ngr=j |
---|
852 | goto 43 |
---|
853 | endif |
---|
854 | end do |
---|
855 | 43 continue |
---|
856 | endif |
---|
857 | |
---|
858 | if (ngr.ne.ngrid) return |
---|
859 | |
---|
860 | ! Determine nested grid coordinates |
---|
861 | !********************************** |
---|
862 | |
---|
863 | if (ngrid.gt.0) then |
---|
864 | xtn=(xt-xln(ngrid))*xresoln(ngrid) |
---|
865 | ytn=(yt-yln(ngrid))*yresoln(ngrid) |
---|
866 | ix=int(xtn) |
---|
867 | jy=int(ytn) |
---|
868 | else |
---|
869 | ix=int(xt) |
---|
870 | jy=int(yt) |
---|
871 | endif |
---|
872 | ixp=ix+1 |
---|
873 | jyp=jy+1 |
---|
874 | |
---|
875 | |
---|
876 | ! Memorize the old wind |
---|
877 | !********************** |
---|
878 | |
---|
879 | uold=u |
---|
880 | vold=v |
---|
881 | wold=w |
---|
882 | |
---|
883 | ! Interpolate wind at new position and time |
---|
884 | !****************************************** |
---|
885 | |
---|
886 | if (ngrid.le.0) then |
---|
887 | xts=real(xt) |
---|
888 | yts=real(yt) |
---|
889 | call interpol_wind_short(itime+ldt*ldirect,xts,yts,zt) |
---|
890 | else |
---|
891 | call interpol_wind_short_nests(itime+ldt*ldirect,xtn,ytn,zt) |
---|
892 | endif |
---|
893 | |
---|
894 | if (mdomainfill.eq.0) then |
---|
895 | if (lsettling) then |
---|
896 | do nsp=1,nspec |
---|
897 | if (xmass(nrelpoint,nsp).gt.eps3) exit |
---|
898 | end do |
---|
899 | if (nsp.gt.nspec) then |
---|
900 | nsp=nspec |
---|
901 | end if |
---|
902 | if (density(nsp).gt.0.) then |
---|
903 | call get_settling(itime+ldt,real(xt),real(yt),zt,nsp,settling) !bugfix |
---|
904 | w=w+settling |
---|
905 | end if |
---|
906 | endif |
---|
907 | end if |
---|
908 | |
---|
909 | |
---|
910 | ! Determine the difference vector between new and old wind |
---|
911 | ! (use half of it to correct position according to Petterssen) |
---|
912 | !************************************************************* |
---|
913 | |
---|
914 | u=(u-uold)/2. |
---|
915 | v=(v-vold)/2. |
---|
916 | w=(w-wold)/2. |
---|
917 | |
---|
918 | |
---|
919 | ! Finally, correct the old position |
---|
920 | !********************************** |
---|
921 | |
---|
922 | zt=zt+w*real(ldt*ldirect) |
---|
923 | if (zt.lt.0.) zt=min(h-eps2,-1.*zt) ! if particle below ground -> reflection |
---|
924 | if (ngrid.ge.0) then |
---|
925 | cosfact=dxconst/cos((yt*dy+ylat0)*pi180) |
---|
926 | xt=xt+real(u*cosfact*real(ldt*ldirect),kind=dp) |
---|
927 | yt=yt+real(v*dyconst*real(ldt*ldirect),kind=dp) |
---|
928 | else if (ngrid.eq.-1) then ! around north pole |
---|
929 | xlon=xlon0+xt*dx |
---|
930 | ylat=ylat0+yt*dy |
---|
931 | call cll2xy(northpolemap,ylat,xlon,xpol,ypol) |
---|
932 | gridsize=1000.*cgszll(northpolemap,ylat,xlon) |
---|
933 | u=u/gridsize |
---|
934 | v=v/gridsize |
---|
935 | xpol=xpol+u*real(ldt*ldirect) |
---|
936 | ypol=ypol+v*real(ldt*ldirect) |
---|
937 | call cxy2ll(northpolemap,xpol,ypol,ylat,xlon) |
---|
938 | xt=(xlon-xlon0)/dx |
---|
939 | yt=(ylat-ylat0)/dy |
---|
940 | else if (ngrid.eq.-2) then ! around south pole |
---|
941 | xlon=xlon0+xt*dx |
---|
942 | ylat=ylat0+yt*dy |
---|
943 | call cll2xy(southpolemap,ylat,xlon,xpol,ypol) |
---|
944 | gridsize=1000.*cgszll(southpolemap,ylat,xlon) |
---|
945 | u=u/gridsize |
---|
946 | v=v/gridsize |
---|
947 | xpol=xpol+u*real(ldt*ldirect) |
---|
948 | ypol=ypol+v*real(ldt*ldirect) |
---|
949 | call cxy2ll(southpolemap,xpol,ypol,ylat,xlon) |
---|
950 | xt=(xlon-xlon0)/dx |
---|
951 | yt=(ylat-ylat0)/dy |
---|
952 | endif |
---|
953 | |
---|
954 | ! If global data are available, use cyclic boundary condition |
---|
955 | !************************************************************ |
---|
956 | |
---|
957 | if (xglobal) then |
---|
958 | if (xt.ge.real(nxmin1)) xt=xt-real(nxmin1) |
---|
959 | if (xt.lt.0.) xt=xt+real(nxmin1) |
---|
960 | if (xt.le.eps) xt=eps |
---|
961 | if (abs(xt-real(nxmin1)).le.eps) xt=real(nxmin1)-eps |
---|
962 | endif |
---|
963 | |
---|
964 | ! HSO/AL: Prevent particles from disappearing at the pole |
---|
965 | !****************************************************************** |
---|
966 | |
---|
967 | if ( yt.lt.0. ) then |
---|
968 | xt=mod(xt+180.,360.) |
---|
969 | yt=-yt |
---|
970 | else if ( yt.gt.real(nymin1) ) then |
---|
971 | xt=mod(xt+180.,360.) |
---|
972 | yt=2*real(nymin1)-yt |
---|
973 | endif |
---|
974 | |
---|
975 | ! Check position: If trajectory outside model domain, terminate it |
---|
976 | !***************************************************************** |
---|
977 | |
---|
978 | if ((xt.lt.0.).or.(xt.ge.real(nxmin1)).or.(yt.lt.0.).or. & |
---|
979 | (yt.gt.real(nymin1))) then |
---|
980 | nstop=3 |
---|
981 | return |
---|
982 | endif |
---|
983 | |
---|
984 | ! If particle above highest model level, set it back into the domain |
---|
985 | !******************************************************************* |
---|
986 | |
---|
987 | if (zt.ge.height(nz)) zt=height(nz)-100.*eps |
---|
988 | |
---|
989 | |
---|
990 | end subroutine advance |
---|
991 | |
---|