1 | !*********************************************************************** |
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2 | !* Copyright 2012,2013 * |
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3 | !* Jerome Brioude, Delia Arnold, Andreas Stohl, Wayne Angevine, * |
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4 | !* John Burkhart, Massimo Cassiani, Adam Dingwell, Richard C Easter, Sabine Eckhardt,* |
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5 | !* Stephanie Evan, Jerome D Fast, Don Morton, Ignacio Pisso, * |
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6 | !* Petra Seibert, Gerard Wotawa, Caroline Forster, Harald Sodemann, * |
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7 | !* * |
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8 | !* This file is part of FLEXPART WRF * |
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9 | !* * |
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10 | !* FLEXPART is free software: you can redistribute it and/or modify * |
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11 | !* it under the terms of the GNU General Public License as published by* |
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12 | !* the Free Software Foundation, either version 3 of the License, or * |
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13 | !* (at your option) any later version. * |
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14 | !* * |
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15 | !* FLEXPART is distributed in the hope that it will be useful, * |
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16 | !* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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17 | !* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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18 | !* GNU General Public License for more details. * |
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19 | !* * |
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20 | !* You should have received a copy of the GNU General Public License * |
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21 | !* along with FLEXPART. If not, see <http://www.gnu.org/licenses/>. * |
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22 | !*********************************************************************** |
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23 | subroutine getfields(itime,nstop) |
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24 | ! i o |
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25 | !******************************************************************************* |
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26 | ! * |
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27 | ! This subroutine manages the 3 data fields to be kept in memory. * |
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28 | ! During the first time step of petterssen it has to be fulfilled that the * |
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29 | ! first data field must have |wftime|<itime, i.e. the absolute value of wftime* |
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30 | ! must be smaller than the absolute value of the current time in [s]. * |
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31 | ! The other 2 fields are the next in time after the first one. * |
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32 | ! Pointers (memind) are used, because otherwise one would have to resort the * |
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33 | ! wind fields, which costs a lot of computing time. Here only the pointers are* |
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34 | ! resorted. * |
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35 | ! * |
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36 | ! Author: A. Stohl * |
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37 | ! * |
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38 | ! 29 April 1994 * |
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39 | ! * |
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40 | ! Changes, Bernd C. Krueger, Feb. 2001: * |
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41 | ! Variables tth,qvh,tthn,qvhn (on eta coordinates) in common block. * |
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42 | ! Function of nstop extended. * |
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43 | ! * |
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44 | ! Dec 2005, R. Easter - * |
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45 | ! When "memtime(2) = itime = wftime(numbwf)", do not read a new file. * |
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46 | ! This allows the ending date/time of the flexpart run to match * |
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47 | ! the date/time of the last met. file. * |
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48 | ! * |
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49 | !******************************************************************************* |
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50 | ! * |
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51 | ! Variables: * |
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52 | ! lwindinterval [s] time difference between the two wind fields read in * |
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53 | ! indj indicates the number of the wind field to be read in * |
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54 | ! indmin remembers the number of wind fields already treated * |
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55 | ! memind(2) pointer, on which place the wind fields are stored * |
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56 | ! memtime(2) [s] times of the wind fields, which are kept in memory * |
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57 | ! itime [s] current time since start date of trajectory calculation * |
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58 | ! nstop > 0, if trajectory has to be terminated * |
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59 | ! nx,ny,nuvz,nwz field dimensions in x,y and z direction * |
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60 | ! uu(0:nxmax,0:nymax,nuvzmax,2) wind components in x-direction [m/s] * |
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61 | ! vv(0:nxmax,0:nymax,nuvzmax,2) wind components in y-direction [m/s] * |
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62 | ! ww(0:nxmax,0:nymax,nwzmax,2) wind components in z-direction [deltaeta/s] * |
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63 | ! tt(0:nxmax,0:nymax,nuvzmax,2) temperature [K] * |
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64 | ! ps(0:nxmax,0:nymax,2) surface pressure [Pa] * |
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65 | ! * |
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66 | ! Constants: * |
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67 | ! idiffmax maximum allowable time difference between 2 wind fields * |
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68 | ! * |
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69 | !******************************************************************************* |
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70 | |
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71 | use par_mod |
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72 | use com_mod |
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73 | |
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74 | implicit none |
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75 | |
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76 | integer :: indj,itime,nstop,memaux |
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77 | |
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78 | real(kind=4) :: uuh(0:nxmax-1,0:nymax-1,nuvzmax) |
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79 | real(kind=4) :: vvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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80 | real(kind=4) :: wwh(0:nxmax-1,0:nymax-1,nwzmax) |
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81 | real(kind=4) :: divh(0:nxmax-1,0:nymax-1,nuvzmax) |
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82 | |
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83 | ! real :: uuh(0:nxmax-1,0:nymax-1,nuvzmax) |
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84 | ! real :: vvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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85 | real :: pvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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86 | ! real :: wwh(0:nxmax-1,0:nymax-1,nwzmax) |
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87 | real(kind=4) :: uuhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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88 | real(kind=4) :: vvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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89 | real :: pvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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90 | real(kind=4) :: wwhn(0:nxmaxn-1,0:nymaxn-1,nwzmax,maxnests) |
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91 | real :: start, finish |
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92 | |
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93 | integer :: indmin = 1 |
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94 | |
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95 | |
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96 | real(kind=4) :: divhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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97 | character(len=28) :: name2 |
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98 | character(len=8) :: chartime |
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99 | integer :: ix,jy,kz |
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100 | |
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101 | |
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102 | |
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103 | ! Check, if wind fields are available for the current time step |
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104 | !************************************************************** |
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105 | |
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106 | nstop=0 |
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107 | |
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108 | if ((ldirect*wftime(1).gt.ldirect*itime).or. & |
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109 | (ldirect*wftime(numbwf).lt.ldirect*itime)) then |
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110 | write(*,*) 'FLEXPART WARNING: NO WIND FIELDS ARE AVAILABLE.' |
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111 | write(*,*) 'A TRAJECTORY HAS TO BE TERMINATED.' |
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112 | nstop=4 |
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113 | return |
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114 | endif |
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115 | |
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116 | |
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117 | if ((ldirect*memtime(1).le.ldirect*itime).and. & |
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118 | (ldirect*memtime(2).gt.ldirect*itime)) then |
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119 | |
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120 | ! The right wind fields are already in memory -> don't do anything |
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121 | !***************************************************************** |
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122 | |
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123 | continue |
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124 | |
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125 | ! FLEXPART_WRF - following change allows the ending date/time |
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126 | ! of the flexpart run to match that of the last met. file |
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127 | else if ( (ldirect*memtime(1).lt.ldirect*itime).and. & |
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128 | (memtime(2).eq.itime) .and. (wftime(numbwf).eq.itime) ) then |
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129 | |
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130 | continue |
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131 | |
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132 | else if ((ldirect*memtime(2).le.ldirect*itime).and. & |
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133 | (memtime(2).ne.999999999)) then |
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134 | |
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135 | |
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136 | ! Current time is after 2nd wind field |
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137 | ! -> Resort wind field pointers, so that current time is between 1st and 2nd |
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138 | !*************************************************************************** |
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139 | |
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140 | memaux=memind(1) |
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141 | memind(1)=memind(2) |
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142 | memind(2)=memaux |
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143 | memtime(1)=memtime(2) |
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144 | |
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145 | |
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146 | ! Read a new wind field and store it on place memind(2) |
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147 | !****************************************************** |
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148 | |
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149 | do indj=indmin,numbwf-1 |
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150 | if (ldirect*wftime(indj+1).gt.ldirect*itime) then |
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151 | call cpu_time(start) |
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152 | if ((time_option.eq.1).and.(wind_option.eq.1)) & |
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153 | call readwind_timeav(indj+1,memind(2),uuh,vvh,wwh) |
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154 | call readwind(indj+1,memind(2),uuh,vvh,wwh,divh) |
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155 | if ((time_option.eq.1).and.(wind_option.eq.1)) & |
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156 | call readwind_nests_timeav(indj+1,memind(2),uuhn,vvhn,wwhn) |
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157 | call readwind_nests(indj+1,memind(2),uuhn,vvhn,wwhn,divhn) |
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158 | if (option_verbose.gt.1) then |
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159 | call cpu_time(finish) |
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160 | print*,'readwind',finish-start |
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161 | call cpu_time(start) |
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162 | endif |
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163 | call calcpar(memind(2),uuh,vvh,pvh) |
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164 | call calcpar_nests(memind(2),uuhn,vvhn,pvhn) |
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165 | if (option_verbose.gt.1) then |
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166 | call cpu_time(finish) |
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167 | print*,'calcpar',finish-start |
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168 | call cpu_time(start) |
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169 | endif |
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170 | call verttransform(memind(2),uuh,vvh,wwh,pvh,divh) |
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171 | call verttransform_nests(memind(2),uuhn,vvhn,wwhn,pvhn,divhn) |
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172 | if (option_verbose.gt.1) then |
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173 | call cpu_time(finish) |
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174 | print*,'verttran',finish-start |
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175 | endif |
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176 | memtime(2)=wftime(indj+1) |
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177 | nstop = 1 |
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178 | goto 40 |
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179 | endif |
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180 | enddo |
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181 | 40 indmin=indj |
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182 | |
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183 | else |
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184 | |
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185 | ! No wind fields, which can be used, are currently in memory |
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186 | ! -> read both wind fields |
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187 | !*********************************************************** |
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188 | |
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189 | do indj=indmin,numbwf-1 |
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190 | if ((ldirect*wftime(indj).le.ldirect*itime).and. & |
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191 | (ldirect*wftime(indj+1).gt.ldirect*itime)) then |
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192 | memind(1)=1 |
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193 | if ((time_option.eq.1).and.(wind_option.eq.1)) & |
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194 | call readwind_timeav(indj,memind(1),uuh,vvh,wwh) |
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195 | call readwind(indj,memind(1),uuh,vvh,wwh,divh) |
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196 | if ((time_option.eq.1).and.(wind_option.eq.1)) & |
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197 | call readwind_nests_timeav(indj,memind(1),uuhn,vvhn,wwhn) |
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198 | call readwind_nests(indj,memind(1),uuhn,vvhn,wwhn,divhn) |
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199 | call calcpar(memind(1),uuh,vvh,pvh) |
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200 | call calcpar_nests(memind(1),uuhn,vvhn,pvhn) |
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201 | call verttransform(memind(1),uuh,vvh,wwh,pvh,divh) |
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202 | call verttransform_nests(memind(1),uuhn,vvhn,wwhn,pvhn,divhn) |
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203 | memtime(1)=wftime(indj) |
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204 | memind(2)=2 |
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205 | if ((time_option.eq.1).and.(wind_option.eq.1)) & |
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206 | call readwind_timeav(indj+1,memind(2),uuh,vvh,wwh) |
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207 | call readwind(indj+1,memind(2),uuh,vvh,wwh,divh) |
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208 | if ((time_option.eq.1).and.(wind_option.eq.1)) & |
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209 | call readwind_nests_timeav(indj+1,memind(2),uuhn,vvhn,wwhn) |
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210 | call readwind_nests(indj+1,memind(2),uuhn,vvhn,wwhn,divhn) |
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211 | call calcpar(memind(2),uuh,vvh,pvh) |
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212 | call calcpar_nests(memind(2),uuhn,vvhn,pvhn) |
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213 | call verttransform(memind(2),uuh,vvh,wwh,pvh,divh) |
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214 | call verttransform_nests(memind(2),uuhn,vvhn,wwhn,pvhn,divhn) |
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215 | memtime(2)=wftime(indj+1) |
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216 | nstop = 1 |
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217 | goto 60 |
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218 | endif |
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219 | end do |
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220 | 60 indmin=indj |
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221 | |
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222 | endif |
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223 | |
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224 | lwindinterv=abs(memtime(2)-memtime(1)) |
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225 | |
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226 | if (lwindinterv.gt.idiffmax) nstop=3 |
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227 | |
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228 | end subroutine getfields |
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