| 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 getfields(itime,nstop,metdata_format) |
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| 23 | ! i o |
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| 24 | !***************************************************************************** |
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| 25 | ! * |
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| 26 | ! This subroutine manages the 3 data fields to be kept in memory. * |
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| 27 | ! During the first time step of petterssen it has to be fulfilled that the * |
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| 28 | ! first data field must have |wftime|<itime, i.e. the absolute value of * |
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| 29 | ! wftime must be smaller than the absolute value of the current time in [s].* |
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| 30 | ! The other 2 fields are the next in time after the first one. * |
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| 31 | ! Pointers (memind) are used, because otherwise one would have to resort the* |
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| 32 | ! wind fields, which costs a lot of computing time. Here only the pointers * |
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| 33 | ! are resorted. * |
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| 34 | ! * |
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| 35 | ! Author: A. Stohl * |
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| 36 | ! * |
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| 37 | ! 29 April 1994 * |
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| 38 | ! * |
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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 | |
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| 45 | ! Changes Arnold, D. and Morton, D. (2015): * |
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| 46 | ! -- description of local and common variables * |
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| 47 | !***************************************************************************** |
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| 48 | |
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| 49 | |
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| 50 | use par_mod |
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| 51 | use com_mod |
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| 52 | |
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| 53 | implicit none |
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| 54 | |
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| 55 | !**************************************************************************** |
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| 56 | ! Subroutine Parameters: * |
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| 57 | ! input * |
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| 58 | ! itime [s] current time since start date of trajectory calcu- * |
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| 59 | ! lation * |
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| 60 | ! nstop > 0, if trajectory has to be terminated * |
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| 61 | ! output * |
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| 62 | ! metdata_format 0 = unknown, 1 = ecmwf, 2 = gfs meteorological data * |
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| 63 | ! |
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| 64 | integer :: itime, nstop, metdata_format |
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| 65 | |
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| 66 | !**************************************************************************** |
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| 67 | |
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| 68 | !**************************************************************************** |
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| 69 | ! Local variables * |
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| 70 | ! |
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| 71 | ! indj indicates the number of the wind field to be read in * |
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| 72 | ! memaux auxiliary variable to shuffle winds in memory * |
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| 73 | ! indmin remembers the number of wind fields already treated * |
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| 74 | ! uu(0:nxmax,0:nymax,nuvzmax,2) wind components in x-direction [m/s] * |
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| 75 | ! vv(0:nxmax,0:nymax,nuvzmax,2) wind components in y-direction [m/s] * |
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| 76 | ! ww(0:nxmax,0:nymax,nwzmax,2) wind components in z-direction [deltaeta/s]* |
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| 77 | ! tt(0:nxmax,0:nymax,nuvzmax,2) temperature [K] * |
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| 78 | ! ps(0:nxmax,0:nymax,2) surface pressure [Pa] * |
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| 79 | ! |
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| 80 | integer :: indj,memaux |
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| 81 | real :: uuh(0:nxmax-1,0:nymax-1,nuvzmax) |
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| 82 | real :: vvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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| 83 | real :: pvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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| 84 | real :: wwh(0:nxmax-1,0:nymax-1,nwzmax) |
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| 85 | real :: uuhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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| 86 | real :: vvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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| 87 | real :: pvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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| 88 | real :: wwhn(0:nxmaxn-1,0:nymaxn-1,nwzmax,maxnests) |
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| 89 | integer :: indmin = 1 |
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| 90 | !**************************************************************************** |
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| 91 | |
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| 92 | |
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| 93 | !**************************************************************************** |
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| 94 | ! Global variables * |
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| 95 | ! from par_mod and com_mod * |
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| 96 | ! nx,ny,nuvz,nwz field dimensions in x,y and z direction * |
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| 97 | ! indmin remembers the number of wind fields already treated * |
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| 98 | ! memind(2) pointer, on which place the wind fields are stored * |
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| 99 | ! memtime(2) [s] times of the wind fields, which are kept in memory * |
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| 100 | ! ndinterval [s] time difference between the two wind fields read in * |
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| 101 | ! ldirect 1 for forward, -1 for backward simulation * |
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| 102 | ! numbwf actual number of wind fields * |
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| 103 | ! wftime(maxwf) [s] times relative to beginning time of wind fields * |
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| 104 | !**************************************************************************** |
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| 105 | |
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| 106 | #ifdef PERFTIMER |
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| 107 | INTEGER millisecs_start, millisecs_stop, count_rate, count_max |
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| 108 | #endif |
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| 109 | !----------------------------------------------------------------------------- |
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| 110 | |
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| 111 | |
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| 112 | ! Check, if wind fields are available for the current time step |
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| 113 | !************************************************************** |
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| 114 | nstop=0 |
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| 115 | |
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| 116 | if ((ldirect*wftime(1).gt.ldirect*itime).or. & |
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| 117 | (ldirect*wftime(numbwf).lt.ldirect*itime)) then |
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| 118 | write(*,*) 'FLEXPART WARNING: NO WIND FIELDS ARE AVAILABLE.' |
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| 119 | write(*,*) 'A TRAJECTORY HAS TO BE TERMINATED.' |
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| 120 | nstop=4 |
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| 121 | return |
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| 122 | endif |
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| 123 | |
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| 124 | |
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| 125 | if ((ldirect*memtime(1).le.ldirect*itime).and. & |
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| 126 | (ldirect*memtime(2).gt.ldirect*itime)) then |
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| 127 | |
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| 128 | ! The right wind fields are already in memory -> don't do anything |
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| 129 | !***************************************************************** |
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| 130 | |
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| 131 | continue |
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| 132 | |
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| 133 | else if ((ldirect*memtime(2).le.ldirect*itime).and. & |
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| 134 | (memtime(2).ne.999999999)) then |
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| 135 | |
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| 136 | |
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| 137 | ! Current time is after 2nd wind field |
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| 138 | ! -> Resort wind field pointers, so that current time is between 1st and 2nd |
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| 139 | !*************************************************************************** |
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| 140 | |
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| 141 | memaux=memind(1) |
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| 142 | memind(1)=memind(2) |
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| 143 | memind(2)=memaux |
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| 144 | memtime(1)=memtime(2) |
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| 145 | |
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| 146 | |
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| 147 | ! Read a new wind field and store it on place memind(2) |
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| 148 | !****************************************************** |
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| 149 | |
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| 150 | do indj=indmin,numbwf-1 |
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| 151 | if (ldirect*wftime(indj+1).gt.ldirect*itime) then |
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| 152 | |
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| 153 | #ifdef PERFTIMER |
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| 154 | CALL SYSTEM_CLOCK(millisecs_start, count_rate, count_max) |
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| 155 | #endif |
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| 156 | if (metdata_format.eq.ecmwf_metdata) then |
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| 157 | call readwind_ecmwf(indj+1,memind(2),uuh,vvh,wwh) |
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| 158 | call readwind_nests(indj+1,memind(2),uuhn,vvhn,wwhn) |
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| 159 | call calcpar_ecmwf(memind(2),uuh,vvh,pvh) |
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| 160 | call calcpar_nests(memind(2),uuhn,vvhn,pvhn,metdata_format) |
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| 161 | call verttransform_ecmwf(memind(2),uuh,vvh,wwh,pvh) |
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| 162 | call verttransform_nests(memind(2),uuhn,vvhn,wwhn,pvhn) |
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| 163 | memtime(2)=wftime(indj+1) |
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| 164 | nstop = 1 |
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| 165 | endif |
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| 166 | if (metdata_format.eq.gfs_metdata) then |
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| 167 | call readwind_gfs(indj+1,memind(2),uuh,vvh,wwh) |
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| 168 | call readwind_nests(indj+1,memind(2),uuhn,vvhn,wwhn) |
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| 169 | call calcpar_gfs(memind(2),uuh,vvh,pvh) |
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| 170 | call calcpar_nests(memind(2),uuhn,vvhn,pvhn,metdata_format) |
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| 171 | call verttransform_gfs(memind(2),uuh,vvh,wwh,pvh) |
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| 172 | call verttransform_nests(memind(2),uuhn,vvhn,wwhn,pvhn) |
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| 173 | memtime(2)=wftime(indj+1) |
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| 174 | nstop = 1 |
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| 175 | endif |
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| 176 | |
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| 177 | #ifdef PERFTIMER |
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| 178 | CALL SYSTEM_CLOCK(millisecs_stop, count_rate, count_max) |
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| 179 | PRINT *, 'Wall time to process: ', TRIM(wfname(indj+1)), & |
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| 180 | ': ', (millisecs_stop-millisecs_start)/1000.0, ' seconds' |
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| 181 | #endif |
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| 182 | |
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| 183 | goto 40 |
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| 184 | endif |
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| 185 | end do |
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| 186 | 40 indmin=indj |
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| 187 | |
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| 188 | else |
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| 189 | |
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| 190 | ! No wind fields, which can be used, are currently in memory |
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| 191 | ! -> read both wind fields |
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| 192 | !*********************************************************** |
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| 193 | |
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| 194 | do indj=indmin,numbwf-1 |
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| 195 | if ((ldirect*wftime(indj).le.ldirect*itime).and. & |
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| 196 | (ldirect*wftime(indj+1).gt.ldirect*itime)) then |
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| 197 | memind(1)=1 |
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| 198 | if (metdata_format.eq.ecmwf_metdata) then |
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| 199 | #ifdef PERFTIMER |
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| 200 | CALL SYSTEM_CLOCK(millisecs_start, count_rate, count_max) |
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| 201 | #endif |
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| 202 | call readwind_ecmwf(indj,memind(1),uuh,vvh,wwh) |
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| 203 | call readwind_nests(indj,memind(1),uuhn,vvhn,wwhn) |
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| 204 | call calcpar_ecmwf(memind(1),uuh,vvh,pvh) |
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| 205 | call calcpar_nests(memind(1),uuhn,vvhn,pvhn,metdata_format) |
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| 206 | call verttransform_ecmwf(memind(1),uuh,vvh,wwh,pvh) |
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| 207 | call verttransform_nests(memind(1),uuhn,vvhn,wwhn,pvhn) |
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| 208 | memtime(1)=wftime(indj) |
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| 209 | memind(2)=2 |
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| 210 | #ifdef PERFTIMER |
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| 211 | CALL SYSTEM_CLOCK(millisecs_stop, count_rate, count_max) |
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| 212 | PRINT *, 'Wall time to process: ', TRIM(wfname(indj)), & |
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| 213 | ': ', (millisecs_stop-millisecs_start)/1000.0, ' seconds' |
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| 214 | #endif |
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| 215 | |
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| 216 | #ifdef PERFTIMER |
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| 217 | CALL SYSTEM_CLOCK(millisecs_start, count_rate, count_max) |
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| 218 | #endif |
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| 219 | call readwind_ecmwf(indj+1,memind(2),uuh,vvh,wwh) |
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| 220 | call readwind_nests(indj+1,memind(2),uuhn,vvhn,wwhn) |
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| 221 | call calcpar_ecmwf(memind(2),uuh,vvh,pvh) |
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| 222 | call calcpar_nests(memind(2),uuhn,vvhn,pvhn,metdata_format) |
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| 223 | call verttransform_ecmwf(memind(2),uuh,vvh,wwh,pvh) |
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| 224 | call verttransform_nests(memind(2),uuhn,vvhn,wwhn,pvhn) |
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| 225 | memtime(2)=wftime(indj+1) |
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| 226 | nstop = 1 |
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| 227 | #ifdef PERFTIMER |
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| 228 | CALL SYSTEM_CLOCK(millisecs_stop, count_rate, count_max) |
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| 229 | PRINT *, 'Wall time to process: ', TRIM(wfname(indj+1)), & |
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| 230 | ': ', (millisecs_stop-millisecs_start)/1000.0, ' seconds' |
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| 231 | #endif |
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| 232 | endif |
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| 233 | if (metdata_format.eq.gfs_metdata) then |
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| 234 | #ifdef PERFTIMER |
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| 235 | CALL SYSTEM_CLOCK(millisecs_start, count_rate, count_max) |
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| 236 | #endif |
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| 237 | call readwind_gfs(indj,memind(1),uuh,vvh,wwh) |
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| 238 | call readwind_nests(indj,memind(1),uuhn,vvhn,wwhn) |
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| 239 | call calcpar_gfs(memind(1),uuh,vvh,pvh) |
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| 240 | call calcpar_nests(memind(1),uuhn,vvhn,pvhn,metdata_format) |
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| 241 | call verttransform_gfs(memind(1),uuh,vvh,wwh,pvh) |
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| 242 | call verttransform_nests(memind(1),uuhn,vvhn,wwhn,pvhn) |
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| 243 | memtime(1)=wftime(indj) |
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| 244 | memind(2)=2 |
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| 245 | #ifdef PERFTIMER |
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| 246 | CALL SYSTEM_CLOCK(millisecs_stop, count_rate, count_max) |
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| 247 | PRINT *, 'Wall time to process: ', TRIM(wfname(indj)), & |
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| 248 | ': ', (millisecs_stop-millisecs_start)/1000.0, ' seconds' |
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| 249 | #endif |
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| 250 | |
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| 251 | #ifdef PERFTIMER |
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| 252 | CALL SYSTEM_CLOCK(millisecs_start, count_rate, count_max) |
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| 253 | #endif |
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| 254 | call readwind_gfs(indj+1,memind(2),uuh,vvh,wwh) |
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| 255 | call readwind_nests(indj+1,memind(2),uuhn,vvhn,wwhn) |
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| 256 | call calcpar_gfs(memind(2),uuh,vvh,pvh) |
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| 257 | call calcpar_nests(memind(2),uuhn,vvhn,pvhn,metdata_format) |
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| 258 | call verttransform_gfs(memind(2),uuh,vvh,wwh,pvh) |
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| 259 | call verttransform_nests(memind(2),uuhn,vvhn,wwhn,pvhn) |
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| 260 | memtime(2)=wftime(indj+1) |
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| 261 | nstop = 1 |
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| 262 | #ifdef PERFTIMER |
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| 263 | CALL SYSTEM_CLOCK(millisecs_stop, count_rate, count_max) |
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| 264 | PRINT *, 'Wall time to process: ', TRIM(wfname(indj+1)), & |
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| 265 | ': ', (millisecs_stop-millisecs_start)/1000.0, ' seconds' |
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| 266 | #endif |
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| 267 | endif |
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| 268 | goto 60 |
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| 269 | endif |
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| 270 | end do |
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| 271 | 60 indmin=indj |
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| 272 | |
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| 273 | endif |
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| 274 | |
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| 275 | lwindinterv=abs(memtime(2)-memtime(1)) |
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| 276 | |
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| 277 | if (lwindinterv.gt.idiffmax) nstop=3 |
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| 278 | |
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| 279 | end subroutine getfields |
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| 280 | |
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| 281 | |
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