[6] | 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 shift_field(field,nxf,nyf,nzfmax,nzf,nmax,n) |
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| 23 | ! i/o i i i i i i |
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| 24 | !***************************************************************************** |
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| 25 | ! * |
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| 26 | ! This subroutine shifts global fields by nxshift grid cells, in order to * |
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| 27 | ! facilitate all sorts of nested wind fields, or output grids, which, * |
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| 28 | ! without shifting, would overlap with the domain "boundary". * |
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| 29 | ! * |
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| 30 | ! Author: A. Stohl * |
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| 31 | ! * |
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| 32 | ! 3 July 2002 * |
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| 33 | ! * |
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| 34 | !***************************************************************************** |
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| 35 | ! * |
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| 36 | ! Variables: * |
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| 37 | ! * |
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| 38 | ! Constants: * |
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| 39 | ! * |
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| 40 | !***************************************************************************** |
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| 41 | |
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| 42 | use par_mod |
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| 43 | |
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| 44 | implicit none |
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| 45 | |
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| 46 | integer :: nxf,nyf,nzf,n,ix,jy,kz,ixs,nzfmax,nmax |
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| 47 | real :: field(0:nxmax-1,0:nymax-1,nzfmax,nmax),xshiftaux(0:nxmax-1) |
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| 48 | |
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| 49 | ! Loop over y and z |
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| 50 | !****************** |
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| 51 | |
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| 52 | do kz=1,nzf |
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| 53 | do jy=0,nyf-1 |
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| 54 | |
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| 55 | ! Shift the data |
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| 56 | !*************** |
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| 57 | |
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| 58 | if (nxshift.ne.0) then |
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| 59 | do ix=0,nxf-1 |
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| 60 | if (ix.ge.nxshift) then |
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| 61 | ixs=ix-nxshift |
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| 62 | else |
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| 63 | ixs=nxf-nxshift+ix |
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| 64 | endif |
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| 65 | xshiftaux(ixs)=field(ix,jy,kz,n) |
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| 66 | end do |
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| 67 | do ix=0,nxf-1 |
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| 68 | field(ix,jy,kz,n)=xshiftaux(ix) |
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| 69 | end do |
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| 70 | endif |
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| 71 | |
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| 72 | ! Repeat the westernmost grid cells at the easternmost domain "boundary" |
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| 73 | !*********************************************************************** |
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| 74 | |
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| 75 | field(nxf,jy,kz,n)=field(0,jy,kz,n) |
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| 76 | end do |
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| 77 | end do |
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| 78 | |
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| 79 | end subroutine shift_field |
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