| 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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