| 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 readoutgrid |
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| 5 | |
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| 6 | !***************************************************************************** |
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| 7 | ! * |
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| 8 | ! This routine reads the user specifications for the output grid. * |
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| 9 | ! * |
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| 10 | ! Author: A. Stohl * |
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| 11 | ! * |
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| 12 | ! 4 June 1996 * |
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| 13 | ! HSO, 1 July 2014 |
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| 14 | ! Added optional namelist input |
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| 15 | ! * |
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| 16 | !***************************************************************************** |
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| 17 | ! * |
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| 18 | ! Variables: * |
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| 19 | ! dxout,dyout grid distance * |
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| 20 | ! numxgrid,numygrid,numzgrid grid dimensions * |
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| 21 | ! outlon0,outlat0 lower left corner of grid * |
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| 22 | ! outheight(maxzgrid) height levels of output grid [m] * |
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| 23 | ! * |
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| 24 | ! Constants: * |
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| 25 | ! unitoutgrid unit connected to file OUTGRID * |
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| 26 | ! * |
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| 27 | !***************************************************************************** |
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| 28 | |
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| 29 | use outg_mod |
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| 30 | use par_mod |
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| 31 | use com_mod |
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| 32 | |
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| 33 | implicit none |
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| 34 | |
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| 35 | integer :: i,j,stat |
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| 36 | real :: outhelp,xr,xr1,yr,yr1 |
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| 37 | real,parameter :: eps=1.e-4 |
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| 38 | |
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| 39 | ! namelist variables |
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| 40 | integer, parameter :: maxoutlev=500 |
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| 41 | integer :: readerror |
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| 42 | real,allocatable, dimension (:) :: outheights |
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| 43 | |
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| 44 | ! declare namelist |
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| 45 | namelist /outgrid/ & |
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| 46 | outlon0,outlat0, & |
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| 47 | numxgrid,numygrid, & |
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| 48 | dxout,dyout, & |
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| 49 | outheights |
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| 50 | |
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| 51 | ! allocate large array for reading input |
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| 52 | allocate(outheights(maxoutlev),stat=stat) |
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| 53 | if (stat.ne.0) write(*,*)'ERROR: could not allocate outheights' |
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| 54 | |
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| 55 | ! helps identifying failed namelist input |
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| 56 | dxout=-1.0 |
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| 57 | outheights=-1.0 |
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| 58 | |
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| 59 | ! Open the OUTGRID file and read output grid specifications |
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| 60 | !********************************************************** |
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| 61 | |
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| 62 | open(unitoutgrid,file=path(1)(1:length(1))//'OUTGRID',status='old',form='formatted',err=999) |
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| 63 | |
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| 64 | ! try namelist input |
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| 65 | read(unitoutgrid,outgrid,iostat=readerror) |
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| 66 | close(unitoutgrid) |
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| 67 | |
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| 68 | if ((dxout.le.0).or.(readerror.ne.0)) then |
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| 69 | |
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| 70 | readerror=1 |
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| 71 | |
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| 72 | open(unitoutgrid,file=path(1)(1:length(1))//'OUTGRID',status='old',err=999) |
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| 73 | |
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| 74 | call skplin(5,unitoutgrid) |
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| 75 | |
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| 76 | ! 1. Read horizontal grid specifications |
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| 77 | !**************************************** |
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| 78 | |
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| 79 | call skplin(3,unitoutgrid) |
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| 80 | read(unitoutgrid,'(4x,f11.4)') outlon0 |
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| 81 | call skplin(3,unitoutgrid) |
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| 82 | read(unitoutgrid,'(4x,f11.4)') outlat0 |
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| 83 | call skplin(3,unitoutgrid) |
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| 84 | read(unitoutgrid,'(4x,i5)') numxgrid |
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| 85 | call skplin(3,unitoutgrid) |
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| 86 | read(unitoutgrid,'(4x,i5)') numygrid |
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| 87 | call skplin(3,unitoutgrid) |
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| 88 | read(unitoutgrid,'(4x,f12.5)') dxout |
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| 89 | call skplin(3,unitoutgrid) |
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| 90 | read(unitoutgrid,'(4x,f12.5)') dyout |
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| 91 | |
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| 92 | endif |
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| 93 | |
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| 94 | ! Check validity of output grid (shall be within model domain) |
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| 95 | !************************************************************* |
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| 96 | |
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| 97 | xr=outlon0+real(numxgrid)*dxout |
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| 98 | yr=outlat0+real(numygrid)*dyout |
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| 99 | xr1=xlon0+real(nxmin1)*dx |
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| 100 | yr1=ylat0+real(nymin1)*dy |
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| 101 | if ((outlon0+eps.lt.xlon0).or.(outlat0+eps.lt.ylat0) & |
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| 102 | .or.(xr.gt.xr1+eps).or.(yr.gt.yr1+eps)) then |
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| 103 | write(*,*) outlon0,outlat0 |
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| 104 | write(*,*) xr1,yr1,xlon0,ylat0,xr,yr,dxout,dyout |
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| 105 | write(*,*) ' #### FLEXPART MODEL ERROR! PART OF OUTPUT ####' |
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| 106 | write(*,*) ' #### GRID IS OUTSIDE MODEL DOMAIN. CHANGE ####' |
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| 107 | write(*,*) ' #### FILE OUTGRID IN DIRECTORY ####' |
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| 108 | write(*,'(a)') path(1)(1:length(1)) |
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| 109 | stop |
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| 110 | endif |
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| 111 | |
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| 112 | ! 2. Count Vertical levels of output grid |
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| 113 | !**************************************** |
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| 114 | |
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| 115 | if (readerror.ne.0) then |
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| 116 | j=0 |
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| 117 | 100 j=j+1 |
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| 118 | do i=1,3 |
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| 119 | read(unitoutgrid,*,end=99) |
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| 120 | end do |
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| 121 | read(unitoutgrid,'(4x,f7.1)',end=99) outhelp |
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| 122 | if (outhelp.eq.0.) goto 99 |
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| 123 | goto 100 |
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| 124 | 99 numzgrid=j-1 |
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| 125 | else |
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| 126 | do i=1,maxoutlev |
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| 127 | if (outheights(i).lt.0) exit |
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| 128 | end do |
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| 129 | numzgrid=i-1 |
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| 130 | end if |
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| 131 | |
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| 132 | allocate(outheight(numzgrid),stat=stat) |
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| 133 | if (stat.ne.0) write(*,*)'ERROR: could not allocate outheight' |
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| 134 | allocate(outheighthalf(numzgrid),stat=stat) |
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| 135 | if (stat.ne.0) write(*,*)'ERROR: could not allocate outheighthalf' |
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| 136 | |
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| 137 | ! 2. Vertical levels of output grid |
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| 138 | !********************************** |
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| 139 | |
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| 140 | if (readerror.ne.0) then |
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| 141 | |
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| 142 | rewind(unitoutgrid) |
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| 143 | call skplin(29,unitoutgrid) |
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| 144 | |
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| 145 | do j=1,numzgrid |
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| 146 | do i=1,3 |
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| 147 | read(unitoutgrid,*) |
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| 148 | end do |
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| 149 | read(unitoutgrid,'(4x,f7.1)') outhelp |
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| 150 | outheight(j)=outhelp |
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| 151 | outheights(j)=outhelp |
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| 152 | end do |
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| 153 | close(unitoutgrid) |
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| 154 | |
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| 155 | else |
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| 156 | |
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| 157 | do j=1,numzgrid |
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| 158 | outheight(j)=outheights(j) |
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| 159 | end do |
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| 160 | |
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| 161 | endif |
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| 162 | |
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| 163 | ! write outgrid file in namelist format to output directory if requested |
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| 164 | if (nmlout.and.lroot) then |
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| 165 | ! reallocate outheights with actually required dimension for namelist writing |
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| 166 | deallocate(outheights) |
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| 167 | allocate(outheights(numzgrid),stat=stat) |
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| 168 | if (stat.ne.0) write(*,*)'ERROR: could not allocate outheights' |
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| 169 | |
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| 170 | do j=1,numzgrid |
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| 171 | outheights(j)=outheight(j) |
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| 172 | end do |
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| 173 | |
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| 174 | open(unitoutgrid,file=path(2)(1:length(2))//'OUTGRID.namelist',err=1000) |
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| 175 | write(unitoutgrid,nml=outgrid) |
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| 176 | close(unitoutgrid) |
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| 177 | endif |
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| 178 | |
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| 179 | ! Check whether vertical levels are specified in ascending order |
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| 180 | !*************************************************************** |
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| 181 | |
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| 182 | do j=2,numzgrid |
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| 183 | if (outheight(j).le.outheight(j-1)) then |
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| 184 | write(*,*) ' #### FLEXPART MODEL ERROR! YOUR SPECIFICATION#### ' |
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| 185 | write(*,*) ' #### OF OUTPUT LEVELS IS CORRUPT AT LEVEL #### ' |
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| 186 | write(*,*) ' #### ',j,' #### ' |
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| 187 | write(*,*) ' #### PLEASE MAKE CHANGES IN FILE OUTGRID. #### ' |
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| 188 | endif |
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| 189 | end do |
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| 190 | |
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| 191 | ! Determine the half levels, i.e. middle levels of the output grid |
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| 192 | !***************************************************************** |
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| 193 | |
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| 194 | outheighthalf(1)=outheight(1)/2. |
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| 195 | do j=2,numzgrid |
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| 196 | outheighthalf(j)=(outheight(j-1)+outheight(j))/2. |
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| 197 | end do |
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| 198 | |
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| 199 | xoutshift=xlon0-outlon0 |
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| 200 | youtshift=ylat0-outlat0 |
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| 201 | |
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| 202 | allocate(oroout(0:numxgrid-1,0:numygrid-1),stat=stat) |
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| 203 | if (stat.ne.0) write(*,*)'ERROR: could not allocate oroout' |
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| 204 | allocate(area(0:numxgrid-1,0:numygrid-1),stat=stat) |
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| 205 | if (stat.ne.0) write(*,*)'ERROR: could not allocate area' |
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| 206 | allocate(volume(0:numxgrid-1,0:numygrid-1,numzgrid),stat=stat) |
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| 207 | if (stat.ne.0) write(*,*)'ERROR: could not allocate volume' |
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| 208 | allocate(areaeast(0:numxgrid-1,0:numygrid-1,numzgrid),stat=stat) |
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| 209 | if (stat.ne.0) write(*,*)'ERROR: could not allocate areaeast' |
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| 210 | allocate(areanorth(0:numxgrid-1,0:numygrid-1,numzgrid),stat=stat) |
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| 211 | if (stat.ne.0) write(*,*)'ERROR: could not allocate areanorth' |
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| 212 | return |
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| 213 | |
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| 214 | |
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| 215 | 999 write(*,*) ' #### FLEXPART MODEL ERROR! FILE "OUTGRID" #### ' |
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| 216 | write(*,*) ' #### CANNOT BE OPENED IN THE DIRECTORY #### ' |
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| 217 | write(*,'(a)') path(1)(1:length(1)) |
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| 218 | stop |
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| 219 | |
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| 220 | 1000 write(*,*) ' #### FLEXPART MODEL ERROR! FILE "OUTGRID" #### ' |
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| 221 | write(*,*) ' #### CANNOT BE OPENED IN THE DIRECTORY #### ' |
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| 222 | write(*,'(a)') path(2)(1:length(2)) |
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| 223 | stop |
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| 224 | |
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| 225 | end subroutine readoutgrid |
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