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|
subroutine gridcheck(oronew,error)
************************************************************************
* *
* TRAJECTORY MODEL SUBROUTINE GRIDCHECK *
* *
************************************************************************
* *
* AUTHOR: G. WOTAWA *
* DATE: 1997-08-06 *
* *
* Update: 1998-12, global fields allowed, A. Stohl *
* 2011-06, implemented reading of grib2 format*
* analog to FLEXPART 8.22 routines *
* *
************************************************************************
* *
* DESCRIPTION: *
* *
* THIS SUBROUTINE DETERMINES THE GRID SPECIFICATIONS (LOWER LEFT *
* LONGITUDE, LOWER LEFT LATITUDE, NUMBER OF GRID POINTS, GRID DIST- *
* ANCE AND VERTICAL DISCRETIZATION OF THE ECMWF MODEL) FROM THE *
* GRIB HEADER OF THE FIRST INPUT FILE. THE CONSISTANCY (NO CHANGES *
* WITHIN ONE FLEXTRA RUN) IS CHECKED IN THE ROUTINE "READWIND" AT ANY *
* CALL. *
* *
* OUTPUT error .true. - can not read grid specifications *
* error .false. - normal *
* oronew .true. - Terrain heights given in grib files *
* oronew .false. - Terrain heights not specified in the *
* grib files (old file standard) *
* *
* XLON0 geographical longitude of lower left gridpoint *
* XLAT0 geographical latitude of lower left gridpoint *
* NX number of grid points x-direction *
* NY number of grid points y-direction *
* DX grid distance x-direction *
* DY grid distance y-direction *
* NUVZ number of grid points for horizontal wind *
* components in z direction *
* NWZ number of grid points for vertical wind *
* sizesouth, sizenorth give the map scale (i.e. number of virtual grid*
* points of the polar stereographic grid): *
* used to check the CFL criterion *
* component in z direction *
* UVHEIGHT(1)- heights of gridpoints where u and v are *
* UVHEIGHT(NUVZ) given *
* WHEIGHT(1)- heights of gridpoints where w is given *
* WHEIGHT(NWZ) *
* *
***********************************************************************
*
use grib_api
include 'includepar'
include 'includecom'
integer i,ifn,ifield,j,k,iumax,iwmax,numskip
real sizesouth,sizenorth,xauxa
logical error,oronew
!HSO parameters for grib_api
integer ifile
integer iret
integer igrib
integer gotGrid
real*4 xaux1,xaux2,yaux1,yaux2
real*8 xaux1in,xaux2in,yaux1in,yaux2in
integer gribVer,parCat,parNum,typSurf,valSurf,discipl
character*24 gribErrorMsg
character*20 gribFunction
!HSO end
* VARIABLES AND ARRAYS NEEDED FOR GRIB DECODING
C dimension of isec2 at least (22+n), where n is the number of parallels or
C meridians in a quasi-regular (reduced) Gaussian or lat/long grid
C dimension of zsec2 at least (10+nn), where nn is the number of vertical
C coordinate parameters
integer isec0(2),isec1(56),isec2(22+nxmax+nymax),isec3(2)
integer isec4(64),inbuff(jpack),ilen,iswap,ierr,iword,lunit
real zsec2(91+2*nuvzmax),zsec3(2),zsec4(jpunp)
character*1 yoper,opt
data yoper/'D'/
error=.false.
oronew=.false.
iumax=0
iwmax=0
*
if(ideltas.gt.0) then
ifn=1
else
ifn=numbwf
endif
*
* OPENING OF DATA FILE (GRIB CODE)
*
5 call grib_open_file(ifile,path(3)(1:len(3))
>//trim(wfname(ifn)),'r',iret)
if (iret.ne.GRIB_SUCCESS) then
goto 999 ! ERROR DETECTED
endif
! turn on support for multi fields messages
! call grib_multi_support_on()
gotGrid=0
ifield=0
10 ifield=ifield+1
*
* GET NEXT FIELDS
*
call grib_new_from_file(ifile,igrib,iret)
if (iret.eq.GRIB_END_OF_FILE ) then
goto 30 ! EOF DETECTED
elseif (iret.ne.GRIB_SUCCESS) then
goto 999 ! ERROR DETECTED
endif
! first see if we read GRIB1 or GRIB2
call grib_get_int(igrib,'editionNumber',gribVer,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
C GRIB 1
C *******************************************************************
if (gribVer.eq.1) then
C print*,'GRiB Edition 1'
c read the grib2 identifiers
call grib_get_int(igrib,'indicatorOfParameter',isec1(6),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'level',isec1(8),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
c change code for etadot to code for omega
if (isec1(6).eq.77) then
isec1(6)=135
endif
C GRIB 2
C *******************************************************************
else
C print*,'GRiB Edition 2'
c read the grib2 identifiers
call grib_get_int(igrib,'discipline',discipl,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'parameterCategory',parCat,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'parameterNumber',parNum,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'typeOfFirstFixedSurface',typSurf,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'level',valSurf,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
! convert to grib1 identifiers
isec1(6)=-1
isec1(7)=-1
isec1(8)=-1
isec1(8)=valSurf ! level
if ((parCat.eq.0).and.(parNum.eq.0).and.(typSurf.eq.105))then ! T
isec1(6)=130 ! indicatorOfParameter
elseif((parCat.eq.2).and.(parNum.eq.2).and.(typSurf.eq.105))then ! U
isec1(6)=131 ! indicatorOfParameter
elseif((parCat.eq.2).and.(parNum.eq.3).and.(typSurf.eq.105))then ! V
isec1(6)=132 ! indicatorOfParameter
elseif((parCat.eq.1).and.(parNum.eq.0).and.(typSurf.eq.105))then ! Q
isec1(6)=133 ! indicatorOfParameter
elseif((parCat.eq.3).and.(parNum.eq.0).and.(typSurf.eq.1))then !SP
isec1(6)=134 ! indicatorOfParameter
elseif((parCat.eq.2).and.(parNum.eq.32)) then ! W, actually eta dot
isec1(6)=135 ! indicatorOfParameter
elseif((parCat.eq.3).and.(parNum.eq.0).and.(typSurf.eq.101))then !SLP
isec1(6)=151 ! indicatorOfParameter
elseif((parCat.eq.2).and.(parNum.eq.2).and.(typSurf.eq.103))then ! 10U
isec1(6)=165 ! indicatorOfParameter
elseif((parCat.eq.2).and.(parNum.eq.3).and.(typSurf.eq.103))then ! 10V
isec1(6)=166 ! indicatorOfParameter
elseif((parCat.eq.0).and.(parNum.eq.0).and.(typSurf.eq.103))then ! 2T
isec1(6)=167 ! indicatorOfParameter
elseif((parCat.eq.0).and.(parNum.eq.6).and.(typSurf.eq.103))then ! 2D
isec1(6)=168 ! indicatorOfParameter
elseif((parCat.eq.1).and.(parNum.eq.11).and.(typSurf.eq.1))then ! SD
isec1(6)=141 ! indicatorOfParameter
elseif((parCat.eq.6).and.(parNum.eq.1)) then ! CC
isec1(6)=164 ! indicatorOfParameter
elseif((parCat.eq.1).and.(parNum.eq.9)) then ! LSP
isec1(6)=142 ! indicatorOfParameter
elseif((parCat.eq.1).and.(parNum.eq.10)) then ! CP
isec1(6)=143 ! indicatorOfParameter
elseif((parCat.eq.0).and.(parNum.eq.11).and.(typSurf.eq.1))then ! SHF
isec1(6)=146 ! indicatorOfParameter
elseif((parCat.eq.4).and.(parNum.eq.9).and.(typSurf.eq.1))then ! SR
isec1(6)=176 ! indicatorOfParameter
elseif((parCat.eq.2).and.(parNum.eq.17))then ! EWSS
isec1(6)=180 ! indicatorOfParameter
elseif((parCat.eq.2).and.(parNum.eq.18))then ! NSSS
isec1(6)=181 ! indicatorOfParameter
elseif((parCat.eq.3).and.(parNum.eq.4))then ! ORO
isec1(6)=129 ! indicatorOfParameter
elseif((parCat.eq.3).and.(parNum.eq.7))then ! SDO
isec1(6)=160 ! indicatorOfParameter
elseif((discipl.eq.2).and.(parCat.eq.0).and.(parNum.eq.0).and.
+ (typSurf.eq.1)) then ! LSM
isec1(6)=172 ! indicatorOfParameter
else
print*,'***ERROR: undefined GRiB2 message found!',discipl,
+ parCat,parNum,typSurf
endif
endif
! get the size and data of the values array
if (isec1(6).ne.-1) then
call grib_get_real4_array(igrib,'values',zsec4,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
endif
if(ifield.eq.1) then
!HSO get the required fields from section 2 in a gribex compatible manner
call grib_get_int(igrib,'numberOfPointsAlongAParallel',
> isec2(2),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'numberOfPointsAlongAMeridian',
> isec2(3),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_real8(igrib,'longitudeOfFirstGridPointInDegrees',
> xaux1in,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_int(igrib,'numberOfVerticalCoordinateValues',
> isec2(12),iret)
call grib_check(iret,gribFunction,gribErrorMsg)
! get the size and data of the vertical coordinate array
call grib_get_real4_array(igrib,'pv',zsec2,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
nxfield=isec2(2)
ny=isec2(3)
nlev_ec=isec2(12)/2-1
endif
!HSO get the second part of the grid dimensions only from GRiB1 messages
if ((gribVer.eq.1).and.(gotGrid.eq.0)) then
call grib_get_real8(igrib,'longitudeOfLastGridPointInDegrees',
> xaux2in,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_real8(igrib,'latitudeOfLastGridPointInDegrees',
> yaux1in,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_real8(igrib,'latitudeOfFirstGridPointInDegrees',
> yaux2in,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
xaux1=xaux1in
xaux2=xaux2in
yaux1=yaux1in
yaux2=yaux2in
if (xaux1.gt.180.) xaux1=xaux1-360.0
if (xaux2.gt.180.) xaux2=xaux2-360.0
if (xaux1.lt.-180.) xaux1=xaux1+360.0
if (xaux2.lt.-180.) xaux2=xaux2+360.0
if (xaux2.lt.xaux1) xaux2=xaux2+360.0
xlon0=xaux1
ylat0=yaux1
dx=(xaux2-xaux1)/float(nxfield-1)
dy=(yaux2-yaux1)/float(ny-1)
gotGrid=1
C Check whether fields are global
C If they contain the poles, specify polar stereographic map
C projections using the stlmbr- and stcm2p-calls
************************************************************
if (xauxa.lt.0.001) then
nx=nxfield+1 ! field is cyclic
xglobal=.true.
else
nx=nxfield
xglobal=.false.
endif
if (xlon0.gt.180.) xlon0=xlon0-360.
xauxa=abs(yaux1+90.)
if (xglobal.and.xauxa.lt.0.001) then
sglobal=.true. ! field contains south pole
C Enhance the map scale by factor 3 (*2=6) compared to north-south
C map scale
sizesouth=6.*(switchsouth+90.)/dy
call stlmbr(southpolemap,-90.,0.)
call stcm2p(southpolemap,0.,0.,switchsouth,0.,sizesouth,
+ sizesouth,switchsouth,180.)
switchsouthg=(switchsouth-ylat0)/dy
else
sglobal=.false.
switchsouthg=999999.
endif
xauxa=abs(yaux2-90.)
if (xglobal.and.xauxa.lt.0.001) then
nglobal=.true. ! field contains north pole
C Enhance the map scale by factor 3 (*2=6) compared to north-south
C map scale
sizenorth=6.*(90.-switchnorth)/dy
call stlmbr(northpolemap,90.,0.)
call stcm2p(northpolemap,0.,0.,switchnorth,0.,sizenorth,
+ sizenorth,switchnorth,180.)
switchnorthg=(switchnorth-ylat0)/dy
else
nglobal=.false.
switchnorthg=999999.
endif
endif ! gotGrid
k=isec1(8)
if(isec1(6).eq.131) iumax=max(iumax,nlev_ec-k+1)
if(isec1(6).eq.135) iwmax=max(iwmax,nlev_ec-k+1)
if(isec1(6).eq.129) then
oronew=.true.
do 20 j=0,ny-1
do 21 i=0,nxfield-1
21 oro(i,j)=zsec4(nxfield*(ny-j-1)+i+1)/ga
if (xglobal) oro(nx-1,j)=oro(0,j)
20 continue
endif
call grib_release(igrib)
goto 10 !! READ NEXT LEVEL OR PARAMETER
*
* CLOSING OF INPUT DATA FILE
*
30 call grib_close_file(ifile)
* error message if no fields found with correct first longitude in it
if (gotGrid.eq.0) then
print*,'***ERROR: input file needs to contain GRiB1 formatted'//
&'messages'
stop
endif
nuvz=iumax
nwz =iwmax
if(nuvz.eq.nlev_ec) nwz=nlev_ec+1
if (nx.gt.nxmax) then
write(*,*) 'FLEXTRA error: Too many grid points in x direction.'
write(*,*) 'Reduce resolution of wind fields.'
write(*,*) 'Or change parameter settings in file includepar.'
write(*,*) nx,nxmax
error=.true.
return
endif
if (ny.gt.nymax) then
write(*,*) 'FLEXTRA error: Too many grid points in y direction.'
write(*,*) 'Reduce resolution of wind fields.'
write(*,*) 'Or change parameter settings in file includepar.'
write(*,*) ny,nymax
error=.true.
return
endif
if (nuvz.gt.nuvzmax) then
write(*,*) 'FLEXTRA error: Too many u,v grid points in z '//
+'direction.'
write(*,*) 'Reduce resolution of wind fields.'
write(*,*) 'Or change parameter settings in file includepar.'
write(*,*) nuvz+1,nuvzmax
error=.true.
return
endif
if (nwz.gt.nwzmax) then
write(*,*) 'FLEXTRA error: Too many w grid points in z '//
+'direction.'
write(*,*) 'Reduce resolution of wind fields.'
write(*,*) 'Or change parameter settings in file includepar.'
write(*,*) nwz,nwzmax
error=.true.
return
endif
C Output of grid info
*********************
write(*,*)
write(*,*)
write(*,'(a,2i7)') '# of vertical levels: ',nuvz,nwz
write(*,*)
write(*,'(a)') 'Mother domain:'
write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Longitude range: ',
+xlon0,' to ',xlon0+(nx-1)*dx,' Grid distance: ',dx
write(*,'(a,f10.2,a1,f10.2,a,f10.2)') ' Latitude range: ',
+ylat0,' to ',ylat0+(ny-1)*dy,' Grid distance: ',dy
write(*,*)
C Compute often used aux variables to convert geografical into grid coord.
***************************************************************************
xthelp=180./pi/r_earth/dx
ythelp=180./pi/r_earth/dy
* CALCULATE VERTICAL DISCRETIZATION OF ECMWF MODEL
* PARAMETER akm,bkm DESCRIBE THE HYBRID "ETA" COORDINATE SYSTEM
* wheight(i) IS THE HEIGHT OF THE i-th MODEL HALF LEVEL (=INTERFACE BETWEEN
* 2 MODEL LEVELS) IN THE "ETA" SYSTEM
numskip=nlev_ec-nuvz ! number of ecmwf model layers not used
! by trajectory model
do 40 i=1,nwz
j=numskip+i
k=nlev_ec+1+numskip+i
akm(nwz-i+1)=zsec2(j)
bkm(nwz-i+1)=zsec2(k)
40 wheight(nwz-i+1)=akm(nwz-i+1)/p0+bkm(nwz-i+1)
* CALCULATION OF uvheight, akz, bkz
* akz,bkz ARE THE DISCRETIZATION PARAMETERS FOR THE MODEL LEVELS
* uvheight(i) IS THE HEIGHT OF THE i-th MODEL LEVEL IN THE "ETA" SYSTEM
do 45 i=1,nuvz
uvheight(i)=0.5*(wheight(i+1)+wheight(i))
akz(i)=0.5*(akm(i+1)+akm(i))
bkz(i)=0.5*(bkm(i+1)+bkm(i))
45 continue
C If vertical coordinates decrease with increasing altitude, multiply by -1.
C This means that also the vertical velocities have to be multiplied by -1.
****************************************************************************
if (uvheight(1).lt.uvheight(nuvz)) then
zdirect=1.
else
zdirect=-1.
do 55 i=1,nuvz
55 uvheight(i)=zdirect*uvheight(i)
do 65 i=1,nwz
65 wheight(i)=zdirect*wheight(i)
endif
C Compute minimum and maximum height of modelling domain
********************************************************
heightmin=max(uvheight(1),wheight(1))
heightmax=min(uvheight(nuvz),wheight(nwz))
return
999 write(*,*)
write(*,*) ' ###########################################'//
& '###### '
write(*,*) ' TRAJECTORY MODEL SUBROUTINE GRIDCHECK:'
write(*,*) ' CAN NOT OPEN INPUT DATA FILE '//wfname(ifn)
write(*,*) ' ###########################################'//
& '###### '
write(*,*)
write(*,'(a)') '!!! PLEASE INSERT A NEW CD-ROM AND !!!'
write(*,'(a)') '!!! PRESS ANY KEY TO CONTINUE... !!!'
write(*,'(a)') '!!! ...OR TERMINATE FLEXTRA PRESSING !!!'
write(*,'(a)') '!!! THE "X" KEY... !!!'
write(*,*)
read(*,'(a)') opt
if(opt.eq.'X') then
error=.true.
else
goto 5
endif
return
end
|
