| 1 | ! SPDX-FileCopyrightText: FLEXPART 1998-2019, see flexpart_license.txt |
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| 2 | ! SPDX-License-Identifier: GPL-3.0-or-later |
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| 3 | |
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| 4 | subroutine getfields(itime,nstop,memstat,metdata_format) |
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| 5 | ! i o o |
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| 6 | !***************************************************************************** |
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| 7 | ! * |
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| 8 | ! This subroutine manages the 3 data fields to be kept in memory. * |
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| 9 | ! During the first time step of petterssen it has to be fulfilled that the * |
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| 10 | ! first data field must have |wftime|<itime, i.e. the absolute value of * |
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| 11 | ! wftime must be smaller than the absolute value of the current time in [s].* |
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| 12 | ! The other 2 fields are the next in time after the first one. * |
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| 13 | ! Pointers (memind) are used, because otherwise one would have to resort the* |
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| 14 | ! wind fields, which costs a lot of computing time. Here only the pointers * |
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| 15 | ! are resorted. * |
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| 16 | ! * |
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| 17 | ! Author: A. Stohl * |
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| 18 | ! * |
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| 19 | ! 29 April 1994 * |
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| 20 | ! * |
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| 21 | !***************************************************************************** |
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| 22 | ! Changes, Bernd C. Krueger, Feb. 2001: |
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| 23 | ! Variables tth,qvh,tthn,qvhn (on eta coordinates) in common block. |
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| 24 | ! Function of nstop extended. |
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| 25 | ! |
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| 26 | ! eso 2014: |
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| 27 | ! MPI version. |
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| 28 | ! If running with number of processes >= mpi_mod::read_grp_min, |
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| 29 | ! only one process (mpi_mod::lmpreader=.true.) does the actual reading, while |
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| 30 | ! the rest call this routine only to update memind, memstat etc. |
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| 31 | ! |
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| 32 | ! If mpi_mod::lmp_sync=.true., uses 3 fields instead of 2, to allow reading |
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| 33 | ! the newest in the background. |
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| 34 | ! |
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| 35 | ! Return memstat, which is the sum of |
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| 36 | ! |
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| 37 | ! memstat=16: one new field to be read |
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| 38 | ! memstat=32: two new fields must be read |
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| 39 | ! memstat=1,2,3: position(s) in array to read next field |
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| 40 | ! memstat=0: no new fields to be read |
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| 41 | ! |
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| 42 | ! Unified ECMWF and GFS builds |
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| 43 | ! Marian Harustak, 12.5.2017 |
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| 44 | ! - Added passing of metdata_format as it was needed by called routines |
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| 45 | ! |
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| 46 | !***************************************************************************** |
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| 47 | ! * |
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| 48 | ! Variables: * |
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| 49 | ! lwindinterval [s] time difference between the two wind fields read in * |
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| 50 | ! indj indicates the number of the wind field to be read in * |
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| 51 | ! indmin remembers the number of wind fields already treated * |
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| 52 | ! memind(2[3]) pointer, on which place the wind fields are stored * |
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| 53 | ! memtime(2[3]) [s] times of the wind fields, which are kept in memory * |
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| 54 | ! itime [s] current time since start date of trajectory calcu- * |
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| 55 | ! lation * |
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| 56 | ! nstop > 0, if trajectory has to be terminated * |
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| 57 | ! memstat keep track of change of status for field pointers * |
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| 58 | ! nx,ny,nuvz,nwz field dimensions in x,y and z direction * |
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| 59 | ! uu(0:nxmax,0:nymax,nuvzmax,numwfmem) wind components in x-direction [m/s]* |
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| 60 | ! vv(0:nxmax,0:nymax,nuvzmax,numwfmem) wind components in y-direction [m/s]* |
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| 61 | ! ww(0:nxmax,0:nymax,nwzmax,numwfmem) wind components in z-direction * |
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| 62 | ! [deltaeta/s] * |
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| 63 | ! tt(0:nxmax,0:nymax,nuvzmax,numwfmem) temperature [K] * |
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| 64 | ! ps(0:nxmax,0:nymax,numwfmem) surface pressure [Pa] * |
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| 65 | ! metdata_format format of metdata (ecmwf/gfs) * |
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| 66 | ! * |
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| 67 | ! Constants: * |
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| 68 | ! idiffmax maximum allowable time difference between 2 wind * |
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| 69 | ! fields * |
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| 70 | ! * |
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| 71 | !***************************************************************************** |
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| 72 | |
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| 73 | use par_mod |
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| 74 | use com_mod |
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| 75 | use mpi_mod, only: lmpreader,lmp_use_reader,lmp_sync |
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| 76 | use class_gribfile |
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| 77 | |
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| 78 | implicit none |
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| 79 | |
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| 80 | integer :: metdata_format |
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| 81 | integer :: indj,itime,nstop,memaux,mindread |
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| 82 | ! mindread: index of where to read 3rd field |
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| 83 | integer, intent(out) :: memstat |
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| 84 | ! keep track of 3rd field index. updated when new fields are read |
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| 85 | integer, save :: mind3=0 |
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| 86 | |
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| 87 | real :: uuh(0:nxmax-1,0:nymax-1,nuvzmax) |
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| 88 | real :: vvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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| 89 | real :: pvh(0:nxmax-1,0:nymax-1,nuvzmax) |
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| 90 | real :: wwh(0:nxmax-1,0:nymax-1,nwzmax) |
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| 91 | real :: uuhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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| 92 | real :: vvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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| 93 | real :: pvhn(0:nxmaxn-1,0:nymaxn-1,nuvzmax,maxnests) |
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| 94 | real :: wwhn(0:nxmaxn-1,0:nymaxn-1,nwzmax,maxnests) |
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| 95 | |
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| 96 | integer :: indmin = 1 |
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| 97 | |
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| 98 | |
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| 99 | ! Check, if wind fields are available for the current time step |
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| 100 | !************************************************************** |
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| 101 | |
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| 102 | nstop=0 |
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| 103 | memstat=0 |
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| 104 | |
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| 105 | if ((ldirect*wftime(1).gt.ldirect*itime).or. & |
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| 106 | (ldirect*wftime(numbwf).lt.ldirect*itime)) then |
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| 107 | write(*,*) 'FLEXPART WARNING: NO WIND FIELDS ARE AVAILABLE.' |
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| 108 | write(*,*) 'A TRAJECTORY HAS TO BE TERMINATED.' |
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| 109 | nstop=4 |
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| 110 | return |
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| 111 | endif |
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| 112 | |
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| 113 | |
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| 114 | if ((ldirect*memtime(1).le.ldirect*itime).and. & |
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| 115 | (ldirect*memtime(2).gt.ldirect*itime)) then |
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| 116 | |
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| 117 | ! The right wind fields are already in memory -> don't do anything |
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| 118 | !***************************************************************** |
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| 119 | memstat=0 |
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| 120 | continue |
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| 121 | |
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| 122 | else if ((ldirect*memtime(2).le.ldirect*itime).and. & |
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| 123 | (memtime(2).ne.999999999)) then |
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| 124 | |
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| 125 | |
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| 126 | ! Current time is after 2nd wind field |
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| 127 | ! -> Resort wind field pointers, so that current time is between 1st and 2nd |
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| 128 | !*************************************************************************** |
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| 129 | |
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| 130 | ! 2 fields in memory |
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| 131 | !******************* |
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| 132 | if (lmp_sync) then |
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| 133 | memaux=memind(1) |
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| 134 | memind(1)=memind(2) |
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| 135 | memind(2)=memaux |
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| 136 | memtime(1)=memtime(2) |
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| 137 | memstat=16+memind(2) |
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| 138 | mindread=memind(2) |
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| 139 | |
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| 140 | else |
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| 141 | ! 3 fields in memory |
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| 142 | ! Note that the reader process never needs to keep 3 fields in memory, |
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| 143 | ! (2 is enough) so it is possible to save some memory |
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| 144 | !********************************************************************* |
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| 145 | if (mind3.eq.32.or.mind3.eq.19) then |
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| 146 | if (lmpreader) then |
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| 147 | memind(1)=2 |
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| 148 | memind(2)=3 |
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| 149 | memind(3)=3 |
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| 150 | else |
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| 151 | memind(1)=2 |
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| 152 | memind(2)=3 |
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| 153 | memind(3)=1 |
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| 154 | end if |
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| 155 | memstat=17 |
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| 156 | else if (mind3.eq.17) then |
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| 157 | if (lmpreader) then |
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| 158 | memind(1)=3 |
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| 159 | memind(2)=1 |
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| 160 | memind(3)=1 |
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| 161 | else |
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| 162 | memind(1)=3 |
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| 163 | memind(2)=1 |
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| 164 | memind(3)=2 |
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| 165 | end if |
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| 166 | memstat=18 |
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| 167 | else if (mind3.eq.18) then |
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| 168 | if (lmpreader) then |
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| 169 | memind(1)=1 |
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| 170 | memind(2)=2 |
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| 171 | memind(3)=2 |
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| 172 | else |
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| 173 | memind(1)=1 |
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| 174 | memind(2)=2 |
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| 175 | memind(3)=3 |
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| 176 | end if |
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| 177 | memstat=19 |
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| 178 | else |
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| 179 | write(*,*) '#### getfields_mpi.f90> ERROR: ', & |
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| 180 | & 'unknown mind3, exiting.', mind3,' ####' |
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| 181 | stop |
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| 182 | end if |
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| 183 | mind3=memstat |
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| 184 | memtime(1)=memtime(2) |
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| 185 | mindread=memind(3) |
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| 186 | end if |
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| 187 | |
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| 188 | |
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| 189 | ! Read a new wind field and store it on place memind(2) |
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| 190 | ! or memind(3) for the 3-field read-ahead version |
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| 191 | !****************************************************** |
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| 192 | do indj=indmin,numbwf-1 |
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| 193 | if (ldirect*wftime(indj+1).gt.ldirect*itime) then |
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| 194 | if (lmpreader.or..not. lmp_use_reader) then |
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| 195 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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| 196 | call readwind_ecmwf(indj+1,mindread,uuh,vvh,wwh) |
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| 197 | else |
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| 198 | call readwind_gfs(indj+1,mindread,uuh,vvh,wwh) |
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| 199 | end if |
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| 200 | call readwind_nests(indj+1,mindread,uuhn,vvhn,wwhn) |
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| 201 | call calcpar(mindread,uuh,vvh,pvh,metdata_format) |
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| 202 | call calcpar_nests(mindread,uuhn,vvhn,pvhn,metdata_format) |
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| 203 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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| 204 | call verttransform_ecmwf(mindread,uuh,vvh,wwh,pvh) |
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| 205 | else |
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| 206 | call verttransform_gfs(mindread,uuh,vvh,wwh,pvh) |
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| 207 | end if |
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| 208 | call verttransform_nests(mindread,uuhn,vvhn,wwhn,pvhn) |
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| 209 | end if |
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| 210 | memtime(2)=wftime(indj+1) |
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| 211 | nstop = 1 |
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| 212 | goto 40 |
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| 213 | endif |
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| 214 | end do |
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| 215 | 40 indmin=indj |
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| 216 | |
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| 217 | if (WETBKDEP.and.(lmpreader.or.(.not.lmp_use_reader.and.lroot))) then |
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| 218 | call writeprecip(itime,memind(1)) |
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| 219 | endif |
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| 220 | |
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| 221 | else |
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| 222 | |
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| 223 | ! No wind fields, which can be used, are currently in memory |
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| 224 | ! -> read both wind fields |
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| 225 | !*********************************************************** |
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| 226 | memstat=32 |
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| 227 | |
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| 228 | do indj=indmin,numbwf-1 |
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| 229 | if ((ldirect*wftime(indj).le.ldirect*itime).and. & |
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| 230 | (ldirect*wftime(indj+1).gt.ldirect*itime)) then |
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| 231 | memind(1)=1 |
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| 232 | if (lmpreader.or..not.lmp_use_reader) then |
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| 233 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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| 234 | call readwind_ecmwf(indj,memind(1),uuh,vvh,wwh) |
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| 235 | else |
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| 236 | call readwind_gfs(indj,memind(1),uuh,vvh,wwh) |
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| 237 | end if |
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| 238 | call readwind_nests(indj,memind(1),uuhn,vvhn,wwhn) |
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| 239 | call calcpar(memind(1),uuh,vvh,pvh,metdata_format) |
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| 240 | call calcpar_nests(memind(1),uuhn,vvhn,pvhn,metdata_format) |
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| 241 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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| 242 | call verttransform_ecmwf(memind(1),uuh,vvh,wwh,pvh) |
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| 243 | else |
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| 244 | call verttransform_gfs(memind(1),uuh,vvh,wwh,pvh) |
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| 245 | end if |
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| 246 | call verttransform_nests(memind(1),uuhn,vvhn,wwhn,pvhn) |
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| 247 | end if |
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| 248 | memtime(1)=wftime(indj) |
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| 249 | memind(2)=2 |
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| 250 | if (lmpreader.or..not.lmp_use_reader) then |
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| 251 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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| 252 | call readwind_ecmwf(indj+1,memind(2),uuh,vvh,wwh) |
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| 253 | else |
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| 254 | call readwind_gfs(indj+1,memind(2),uuh,vvh,wwh) |
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| 255 | end if |
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| 256 | call readwind_nests(indj+1,memind(2),uuhn,vvhn,wwhn) |
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| 257 | call calcpar(memind(2),uuh,vvh,pvh,metdata_format) |
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| 258 | call calcpar_nests(memind(2),uuhn,vvhn,pvhn,metdata_format) |
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| 259 | if (metdata_format.eq.GRIBFILE_CENTRE_ECMWF) then |
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| 260 | call verttransform_ecmwf(memind(2),uuh,vvh,wwh,pvh) |
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| 261 | else |
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| 262 | call verttransform_gfs(memind(2),uuh,vvh,wwh,pvh) |
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| 263 | end if |
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| 264 | call verttransform_nests(memind(2),uuhn,vvhn,wwhn,pvhn) |
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| 265 | end if |
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| 266 | memtime(2)=wftime(indj+1) |
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| 267 | ! DEV: not used |
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| 268 | if (.not.lmp_sync) memind(3)=3 ! indicate position of next read |
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| 269 | nstop = 1 |
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| 270 | goto 60 |
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| 271 | endif |
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| 272 | end do |
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| 273 | 60 indmin=indj |
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| 274 | |
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| 275 | ! if (WETBKDEP.and.lroot) then |
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| 276 | if (WETBKDEP.and.(lmpreader.or.(.not.lmp_use_reader.and.lroot))) then |
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| 277 | call writeprecip(itime,memind(1)) |
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| 278 | endif |
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| 279 | |
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| 280 | endif |
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| 281 | |
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| 282 | lwindinterv=abs(memtime(2)-memtime(1)) |
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| 283 | |
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| 284 | if (lwindinterv.gt.idiffmax) nstop=3 |
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| 285 | |
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| 286 | end subroutine getfields |
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