[22] | 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 gridcheck_nests |
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| 23 | |
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| 24 | !***************************************************************************** |
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| 25 | ! * |
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| 26 | ! This routine checks the grid specification for the nested model * |
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| 27 | ! domains. It is similar to subroutine gridcheck, which checks the * |
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| 28 | ! mother domain. * |
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| 29 | ! * |
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| 30 | ! Authors: A. Stohl, G. Wotawa * |
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| 31 | ! * |
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| 32 | ! 8 February 1999 * |
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| 33 | ! * |
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| 34 | !***************************************************************************** |
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| 35 | |
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| 36 | use par_mod |
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| 37 | use com_mod |
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| 38 | |
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| 39 | implicit none |
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| 40 | |
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| 41 | integer :: i,j,k,l,ifn,ifield,iumax,iwmax,numskip,nlev_ecn |
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| 42 | integer :: nuvzn,nwzn |
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| 43 | real :: akmn(nwzmax),bkmn(nwzmax),akzn(nuvzmax),bkzn(nuvzmax) |
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| 44 | real :: xaux1,xaux2,yaux1,yaux2 |
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| 45 | |
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| 46 | ! VARIABLES AND ARRAYS NEEDED FOR GRIB DECODING |
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| 47 | |
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| 48 | ! dimension of isec2 at least (22+n), where n is the number of parallels or |
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| 49 | ! meridians in a quasi-regular (reduced) Gaussian or lat/long grid |
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| 50 | |
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| 51 | ! dimension of zsec2 at least (10+nn), where nn is the number of vertical |
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| 52 | ! coordinate parameters |
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| 53 | |
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| 54 | integer :: isec0(2),isec1(56),isec2(22+nxmaxn+nymaxn),isec3(2) |
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| 55 | integer :: isec4(64),inbuff(jpack),ilen,ierr,iword,lunit |
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| 56 | !integer iswap |
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| 57 | real :: zsec2(60+2*nuvzmax),zsec3(2),zsec4(jpunp) |
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| 58 | character(len=1) :: yoper = 'D' |
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| 59 | |
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| 60 | xresoln(0)=1. ! resolution enhancement for mother grid |
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| 61 | yresoln(0)=1. ! resolution enhancement for mother grid |
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| 62 | |
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| 63 | ! Loop about all nesting levels |
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| 64 | !****************************** |
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| 65 | |
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| 66 | do l=1,numbnests |
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| 67 | |
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| 68 | iumax=0 |
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| 69 | iwmax=0 |
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| 70 | |
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| 71 | if(ideltas.gt.0) then |
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| 72 | ifn=1 |
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| 73 | else |
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| 74 | ifn=numbwf |
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| 75 | endif |
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| 76 | ! |
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| 77 | ! OPENING OF DATA FILE (GRIB CODE) |
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| 78 | ! |
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| 79 | 5 call pbopen(lunit,path(numpath+2*(l-1)+1) & |
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| 80 | (1:length(numpath+2*(l-1)+1))//wfnamen(l,ifn),'r',ierr) |
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| 81 | if(ierr.lt.0) goto 999 |
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| 82 | |
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| 83 | ifield=0 |
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| 84 | 10 ifield=ifield+1 |
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| 85 | ! |
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| 86 | ! GET NEXT FIELDS |
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| 87 | ! |
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| 88 | call pbgrib(lunit,inbuff,jpack,ilen,ierr) |
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| 89 | if(ierr.eq.-1) goto 30 ! EOF DETECTED |
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| 90 | if(ierr.lt.-1) goto 999 ! ERROR DETECTED |
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| 91 | |
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| 92 | ierr=1 |
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| 93 | |
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| 94 | ! Check whether we are on a little endian or on a big endian computer |
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| 95 | !******************************************************************** |
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| 96 | |
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| 97 | ! if (inbuff(1).eq.1112101447) then ! little endian, swap bytes |
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| 98 | ! iswap=1+ilen/4 |
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| 99 | ! call swap32(inbuff,iswap) |
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| 100 | ! else if (inbuff(1).ne.1196575042) then ! big endian |
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| 101 | ! stop 'subroutine gridcheck: corrupt GRIB data' |
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| 102 | ! endif |
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| 103 | |
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| 104 | call gribex(isec0,isec1,isec2,zsec2,isec3,zsec3,isec4, & |
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| 105 | zsec4,jpunp,inbuff,jpack,iword,yoper,ierr) |
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| 106 | if (ierr.ne.0) goto 999 ! ERROR DETECTED |
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| 107 | |
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| 108 | if(ifield.eq.1) then |
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| 109 | nxn(l)=isec2(2) |
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| 110 | nyn(l)=isec2(3) |
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| 111 | xaux1=real(isec2(5))/1000. |
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| 112 | xaux2=real(isec2(8))/1000. |
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| 113 | if(xaux1.gt.180) xaux1=xaux1-360.0 |
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| 114 | if(xaux2.gt.180) xaux2=xaux2-360.0 |
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| 115 | if(xaux1.lt.-180) xaux1=xaux1+360.0 |
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| 116 | if(xaux2.lt.-180) xaux2=xaux2+360.0 |
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| 117 | if (xaux2.lt.xaux1) xaux2=xaux2+360. |
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| 118 | yaux1=real(isec2(7))/1000. |
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| 119 | yaux2=real(isec2(4))/1000. |
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| 120 | xlon0n(l)=xaux1 |
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| 121 | ylat0n(l)=yaux1 |
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| 122 | dxn(l)=(xaux2-xaux1)/real(nxn(l)-1) |
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| 123 | dyn(l)=(yaux2-yaux1)/real(nyn(l)-1) |
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| 124 | nlev_ecn=isec2(12)/2-1 |
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| 125 | endif |
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| 126 | |
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| 127 | |
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| 128 | k=isec1(8) |
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| 129 | if(isec1(6).eq.131) iumax=max(iumax,nlev_ec-k+1) |
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| 130 | if(isec1(6).eq.135) iwmax=max(iwmax,nlev_ec-k+1) |
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| 131 | |
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| 132 | if(isec1(6).eq.129) then |
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| 133 | do j=0,nyn(l)-1 |
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| 134 | do i=0,nxn(l)-1 |
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| 135 | oron(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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| 136 | end do |
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| 137 | end do |
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| 138 | endif |
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| 139 | if(isec1(6).eq.172) then |
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| 140 | do j=0,nyn(l)-1 |
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| 141 | do i=0,nxn(l)-1 |
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| 142 | lsmn(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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| 143 | end do |
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| 144 | end do |
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| 145 | endif |
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| 146 | if(isec1(6).eq.160) then |
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| 147 | do j=0,nyn(l)-1 |
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| 148 | do i=0,nxn(l)-1 |
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| 149 | excessoron(i,j,l)=zsec4(nxn(l)*(nyn(l)-j-1)+i+1)/ga |
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| 150 | end do |
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| 151 | end do |
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| 152 | endif |
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| 153 | |
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| 154 | goto 10 !! READ NEXT LEVEL OR PARAMETER |
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| 155 | ! |
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| 156 | ! CLOSING OF INPUT DATA FILE |
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| 157 | ! |
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| 158 | 30 call pbclose(lunit,ierr) !! FINISHED READING / CLOSING GRIB FILE |
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| 159 | |
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| 160 | nuvzn=iumax |
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| 161 | nwzn=iwmax |
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| 162 | if(nuvzn.eq.nlev_ec) nwzn=nlev_ecn+1 |
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| 163 | |
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| 164 | if (nxn(l).gt.nxmaxn) then |
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| 165 | write(*,*) 'FLEXPART error: Too many grid points in x direction.' |
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| 166 | write(*,*) 'Reduce resolution of wind fields (file GRIDSPEC)' |
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| 167 | write(*,*) 'for nesting level ',l |
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| 168 | write(*,*) 'Or change parameter settings in file par_mod.' |
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| 169 | write(*,*) nxn(l),nxmaxn |
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| 170 | stop |
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| 171 | endif |
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| 172 | |
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| 173 | if (nyn(l).gt.nymaxn) then |
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| 174 | write(*,*) 'FLEXPART error: Too many grid points in y direction.' |
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| 175 | write(*,*) 'Reduce resolution of wind fields (file GRIDSPEC)' |
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| 176 | write(*,*) 'for nesting level ',l |
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| 177 | write(*,*) 'Or change parameter settings in file par_mod.' |
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| 178 | write(*,*) nyn(l),nymaxn |
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| 179 | stop |
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| 180 | endif |
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| 181 | |
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| 182 | if ((nuvzn.gt.nuvzmax).or.(nwzn.gt.nwzmax)) then |
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| 183 | write(*,*) 'FLEXPART error: Nested wind fields have too many'// & |
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| 184 | 'vertical levels.' |
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| 185 | write(*,*) 'Problem was encountered for nesting level ',l |
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| 186 | stop |
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| 187 | endif |
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| 188 | |
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| 189 | |
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| 190 | ! Output of grid info |
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| 191 | !******************** |
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| 192 | |
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| 193 | write(*,'(a,i2)') 'Nested domain #: ',l |
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| 194 | write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Longitude range: ', & |
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| 195 | xlon0n(l),' to ',xlon0n(l)+(nxn(l)-1)*dxn(l), & |
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| 196 | ' Grid distance: ',dxn(l) |
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| 197 | write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Latitude range: ', & |
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| 198 | ylat0n(l),' to ',ylat0n(l)+(nyn(l)-1)*dyn(l), & |
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| 199 | ' Grid distance: ',dyn(l) |
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| 200 | write(*,*) |
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| 201 | |
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| 202 | ! Determine, how much the resolutions in the nests are enhanced as |
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| 203 | ! compared to the mother grid |
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| 204 | !***************************************************************** |
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| 205 | |
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| 206 | xresoln(l)=dx/dxn(l) |
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| 207 | yresoln(l)=dy/dyn(l) |
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| 208 | |
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| 209 | ! Determine the mother grid coordinates of the corner points of the |
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| 210 | ! nested grids |
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| 211 | ! Convert first to geographical coordinates, then to grid coordinates |
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| 212 | !******************************************************************** |
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| 213 | |
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| 214 | xaux1=xlon0n(l) |
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| 215 | xaux2=xlon0n(l)+real(nxn(l)-1)*dxn(l) |
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| 216 | yaux1=ylat0n(l) |
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| 217 | yaux2=ylat0n(l)+real(nyn(l)-1)*dyn(l) |
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| 218 | |
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| 219 | xln(l)=(xaux1-xlon0)/dx |
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| 220 | xrn(l)=(xaux2-xlon0)/dx |
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| 221 | yln(l)=(yaux1-ylat0)/dy |
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| 222 | yrn(l)=(yaux2-ylat0)/dy |
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| 223 | |
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| 224 | |
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| 225 | if ((xln(l).lt.0.).or.(yln(l).lt.0.).or. & |
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| 226 | (xrn(l).gt.real(nxmin1)).or.(yrn(l).gt.real(nymin1))) then |
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| 227 | write(*,*) 'Nested domain does not fit into mother domain' |
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| 228 | write(*,*) 'For global mother domain fields, you can shift' |
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| 229 | write(*,*) 'shift the mother domain into x-direction' |
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| 230 | write(*,*) 'by setting nxshift (file par_mod) to a' |
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| 231 | write(*,*) 'positive value. Execution is terminated.' |
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| 232 | stop |
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| 233 | endif |
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| 234 | |
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| 235 | |
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| 236 | ! CALCULATE VERTICAL DISCRETIZATION OF ECMWF MODEL |
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| 237 | ! PARAMETER akm,bkm DESCRIBE THE HYBRID "ETA" COORDINATE SYSTEM |
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| 238 | |
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| 239 | numskip=nlev_ecn-nuvzn ! number of ecmwf model layers not used by FLEXPART |
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| 240 | do i=1,nwzn |
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| 241 | j=numskip+i |
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| 242 | k=nlev_ecn+1+numskip+i |
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| 243 | akmn(nwzn-i+1)=zsec2(10+j) |
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| 244 | bkmn(nwzn-i+1)=zsec2(10+k) |
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| 245 | end do |
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| 246 | |
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| 247 | ! |
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| 248 | ! CALCULATION OF AKZ, BKZ |
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| 249 | ! AKZ,BKZ: model discretization parameters at the center of each model |
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| 250 | ! layer |
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| 251 | ! |
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| 252 | ! Assign the 10 m winds to an artificial model level with akz=0 and bkz=1.0, |
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| 253 | ! i.e. ground level |
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| 254 | !***************************************************************************** |
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| 255 | |
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| 256 | akzn(1)=0. |
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| 257 | bkzn(1)=1.0 |
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| 258 | do i=1,nuvzn |
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| 259 | akzn(i+1)=0.5*(akmn(i+1)+akmn(i)) |
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| 260 | bkzn(i+1)=0.5*(bkmn(i+1)+bkmn(i)) |
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| 261 | end do |
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| 262 | nuvzn=nuvzn+1 |
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| 263 | |
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| 264 | ! Check, whether the heights of the model levels of the nested |
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| 265 | ! wind fields are consistent with those of the mother domain. |
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| 266 | ! If not, terminate model run. |
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| 267 | !************************************************************* |
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| 268 | |
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| 269 | do i=1,nuvz |
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| 270 | if ((akzn(i).ne.akz(i)).or.(bkzn(i).ne.bkz(i))) then |
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| 271 | write(*,*) 'FLEXPART error: The wind fields of nesting level',l |
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| 272 | write(*,*) 'are not consistent with the mother domain:' |
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| 273 | write(*,*) 'Differences in vertical levels detected.' |
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| 274 | stop |
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| 275 | endif |
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| 276 | end do |
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| 277 | |
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| 278 | do i=1,nwz |
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| 279 | if ((akmn(i).ne.akm(i)).or.(bkmn(i).ne.bkm(i))) then |
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| 280 | write(*,*) 'FLEXPART error: The wind fields of nesting level',l |
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| 281 | write(*,*) 'are not consistent with the mother domain:' |
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| 282 | write(*,*) 'Differences in vertical levels detected.' |
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| 283 | stop |
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| 284 | endif |
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| 285 | end do |
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| 286 | |
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| 287 | end do |
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| 288 | |
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| 289 | return |
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| 290 | |
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| 291 | 999 write(*,*) |
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| 292 | write(*,*) ' ###########################################'// & |
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| 293 | '###### ' |
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| 294 | write(*,*) ' FLEXPART SUBROUTINE GRIDCHECK:' |
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| 295 | write(*,*) ' CAN NOT OPEN INPUT DATA FILE '//wfnamen(l,ifn) |
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| 296 | write(*,*) ' FOR NESTING LEVEL ',k |
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| 297 | write(*,*) ' ###########################################'// & |
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| 298 | '###### ' |
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| 299 | stop |
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| 300 | |
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| 301 | end subroutine gridcheck_nests |
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