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 calcpar_nests(n,uuhn,vvhn,pvhn) |
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23 | ! i i i o |
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24 | !***************************************************************************** |
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25 | ! * |
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26 | ! Computation of several boundary layer parameters needed for the * |
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27 | ! dispersion calculation and calculation of dry deposition velocities. * |
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28 | ! All parameters are calculated over the entire grid. * |
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29 | ! This routine is similar to calcpar, but is used for the nested grids. * |
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30 | ! * |
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31 | ! Author: A. Stohl * |
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32 | ! * |
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33 | ! 8 February 1999 * |
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34 | ! * |
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35 | ! ------------------------------------------------------------------ * |
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36 | ! Petra Seibert, Feb 2000: * |
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37 | ! convection scheme: * |
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38 | ! new variables in call to richardson * |
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39 | ! * |
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40 | !***************************************************************************** |
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41 | ! Changes, Bernd C. Krueger, Feb. 2001: |
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42 | ! Variables tth and qvh (on eta coordinates) in common block |
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43 | !***************************************************************************** |
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44 | ! * |
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45 | ! Variables: * |
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46 | ! n temporal index for meteorological fields (1 to 3) * |
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47 | ! * |
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48 | ! Constants: * |
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49 | ! * |
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50 | ! * |
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51 | ! Functions: * |
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52 | ! scalev computation of ustar * |
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53 | ! obukhov computatio of Obukhov length * |
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54 | ! * |
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55 | !***************************************************************************** |
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56 | |
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57 | use par_mod |
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58 | use com_mod |
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59 | |
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60 | implicit none |
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61 | |
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62 | integer :: n,ix,jy,i,l,kz,lz,kzmin |
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63 | real :: ttlev(nuvzmax),qvlev(nuvzmax),obukhov,scalev,ol,hmixplus |
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64 | real :: ulev(nuvzmax),vlev(nuvzmax),ew,rh,vd(maxspec),subsceff,ylat |
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65 | real :: altmin,tvold,pold,zold,pint,tv,zlev(nuvzmax) |
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66 | real :: uuhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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67 | real :: vvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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68 | real :: pvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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69 | real,parameter :: const=r_air/ga |
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70 | |
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71 | |
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72 | ! Loop over all nests |
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73 | !******************** |
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74 | |
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75 | do l=1,numbnests |
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76 | |
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77 | ! Loop over entire grid |
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78 | !********************** |
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79 | |
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80 | do jy=0,nyn(l)-1 |
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81 | |
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82 | ! Set minimum height for tropopause |
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83 | !********************************** |
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84 | |
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85 | ylat=ylat0n(l)+real(jy)*dyn(l) |
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86 | if ((ylat.ge.-20.).and.(ylat.le.20.)) then |
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87 | altmin = 5000. |
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88 | else |
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89 | if ((ylat.gt.20.).and.(ylat.lt.40.)) then |
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90 | altmin=2500.+(40.-ylat)*125. |
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91 | else if ((ylat.gt.-40.).and.(ylat.lt.-20.)) then |
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92 | altmin=2500.+(40.+ylat)*125. |
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93 | else |
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94 | altmin=2500. |
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95 | endif |
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96 | endif |
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97 | |
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98 | do ix=0,nxn(l)-1 |
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99 | |
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100 | ! 1) Calculation of friction velocity |
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101 | !************************************ |
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102 | |
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103 | ustarn(ix,jy,1,n,l)=scalev(psn(ix,jy,1,n,l),tt2n(ix,jy,1,n,l), & |
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104 | td2n(ix,jy,1,n,l),surfstrn(ix,jy,1,n,l)) |
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105 | |
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106 | ! 2) Calculation of inverse Obukhov length scale |
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107 | !*********************************************** |
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108 | |
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109 | ol=obukhov(psn(ix,jy,1,n,l),tt2n(ix,jy,1,n,l), & |
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110 | td2n(ix,jy,1,n,l),tthn(ix,jy,2,n,l),ustarn(ix,jy,1,n,l), & |
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111 | sshfn(ix,jy,1,n,l),akm,bkm) |
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112 | if (ol.ne.0.) then |
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113 | olin(ix,jy,1,n,l)=1./ol |
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114 | else |
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115 | olin(ix,jy,1,n,l)=99999. |
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116 | endif |
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117 | |
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118 | |
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119 | ! 3) Calculation of convective velocity scale and mixing height |
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120 | !************************************************************** |
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121 | |
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122 | do i=1,nuvz |
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123 | ulev(i)=uuhn(ix,jy,i,l) |
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124 | vlev(i)=vvhn(ix,jy,i,l) |
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125 | ttlev(i)=tthn(ix,jy,i,n,l) |
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126 | qvlev(i)=qvhn(ix,jy,i,n,l) |
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127 | end do |
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128 | |
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129 | call richardson(psn(ix,jy,1,n,l),ustarn(ix,jy,1,n,l),ttlev, & |
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130 | qvlev,ulev,vlev,nuvz,akz,bkz,sshfn(ix,jy,1,n,l), & |
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131 | tt2n(ix,jy,1,n,l),td2n(ix,jy,1,n,l),hmixn(ix,jy,1,n,l), & |
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132 | wstarn(ix,jy,1,n,l),hmixplus) |
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133 | |
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134 | if(lsubgrid.eq.1) then |
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135 | subsceff=min(excessoron(ix,jy,l),hmixplus) |
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136 | else |
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137 | subsceff=0 |
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138 | endif |
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139 | ! |
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140 | ! CALCULATE HMIX EXCESS ACCORDING TO SUBGRIDSCALE VARIABILITY AND STABILITY |
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141 | ! |
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142 | hmixn(ix,jy,1,n,l)=hmixn(ix,jy,1,n,l)+subsceff |
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143 | hmixn(ix,jy,1,n,l)=max(hmixmin,hmixn(ix,jy,1,n,l)) ! minim PBL height |
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144 | hmixn(ix,jy,1,n,l)=min(hmixmax,hmixn(ix,jy,1,n,l)) ! maxim PBL height |
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145 | |
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146 | |
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147 | ! 4) Calculation of dry deposition velocities |
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148 | !******************************************** |
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149 | |
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150 | if (DRYDEP) then |
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151 | z0(4)=0.016*ustarn(ix,jy,1,n,l)*ustarn(ix,jy,1,n,l)/ga |
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152 | z0(9)=0.016*ustarn(ix,jy,1,n,l)*ustarn(ix,jy,1,n,l)/ga |
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153 | |
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154 | ! Calculate relative humidity at surface |
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155 | !*************************************** |
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156 | rh=ew(td2n(ix,jy,1,n,l))/ew(tt2n(ix,jy,1,n,l)) |
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157 | |
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158 | call getvdep_nests(n,ix,jy,ustarn(ix,jy,1,n,l), & |
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159 | tt2n(ix,jy,1,n,l),psn(ix,jy,1,n,l),1./olin(ix,jy,1,n,l), & |
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160 | ssrn(ix,jy,1,n,l),rh,lsprecn(ix,jy,1,n,l)+ & |
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161 | convprecn(ix,jy,1,n,l),sdn(ix,jy,1,n,l),vd,l) |
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162 | |
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163 | do i=1,nspec |
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164 | vdepn(ix,jy,i,n,l)=vd(i) |
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165 | end do |
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166 | |
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167 | endif |
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168 | |
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169 | !****************************************************** |
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170 | ! Calculate height of thermal tropopause (Hoinka, 1997) |
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171 | !****************************************************** |
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172 | |
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173 | ! 1) Calculate altitudes of ECMWF model levels |
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174 | !********************************************* |
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175 | |
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176 | tvold=tt2n(ix,jy,1,n,l)*(1.+0.378*ew(td2n(ix,jy,1,n,l))/ & |
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177 | psn(ix,jy,1,n,l)) |
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178 | pold=psn(ix,jy,1,n,l) |
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179 | zold=0. |
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180 | do kz=2,nuvz |
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181 | pint=akz(kz)+bkz(kz)*psn(ix,jy,1,n,l) ! pressure on model layers |
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182 | tv=tthn(ix,jy,kz,n,l)*(1.+0.608*qvhn(ix,jy,kz,n,l)) |
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183 | |
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184 | if (abs(tv-tvold).gt.0.2) then |
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185 | zlev(kz)=zold+const*log(pold/pint)*(tv-tvold)/log(tv/tvold) |
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186 | else |
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187 | zlev(kz)=zold+const*log(pold/pint)*tv |
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188 | endif |
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189 | tvold=tv |
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190 | pold=pint |
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191 | zold=zlev(kz) |
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192 | end do |
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193 | |
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194 | ! 2) Define a minimum level kzmin, from which upward the tropopause is |
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195 | ! searched for. This is to avoid inversions in the lower troposphere |
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196 | ! to be identified as the tropopause |
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197 | !************************************************************************ |
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198 | |
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199 | do kz=1,nuvz |
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200 | if (zlev(kz).ge.altmin) then |
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201 | kzmin=kz |
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202 | goto 45 |
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203 | endif |
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204 | end do |
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205 | 45 continue |
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206 | |
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207 | ! 3) Search for first stable layer above minimum height that fulfills the |
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208 | ! thermal tropopause criterion |
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209 | !************************************************************************ |
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210 | |
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211 | do kz=kzmin,nuvz |
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212 | do lz=kz+1,nuvz |
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213 | if ((zlev(lz)-zlev(kz)).gt.2000.) then |
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214 | if (((tthn(ix,jy,kz,n,l)-tthn(ix,jy,lz,n,l))/ & |
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215 | (zlev(lz)-zlev(kz))).lt.0.002) then |
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216 | tropopausen(ix,jy,1,n,l)=zlev(kz) |
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217 | goto 51 |
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218 | endif |
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219 | goto 50 |
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220 | endif |
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221 | end do |
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222 | 50 continue |
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223 | end do |
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224 | 51 continue |
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225 | |
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226 | |
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227 | end do |
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228 | end do |
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229 | |
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230 | |
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231 | call calcpv_nests(l,n,uuhn,vvhn,pvhn) |
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232 | |
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233 | end do |
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234 | |
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235 | |
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236 | end subroutine calcpar_nests |
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