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|
subroutine readwind(indj,n)
***********************************************************************
* *
* TRAJECTORY MODEL SUBROUTINE READWIND *
* *
***********************************************************************
* *
* AUTHOR: G. WOTAWA *
* DATE: 1997-08-05 *
* LAST UPDATE: ---------- *
* Update: 1998-07-29, global fields allowed *
* A. Stohl, G. Wotawa *
* 2011-06, implemented reading of grib2 format*
* analog to FLEXPART 8.22 routines *
* *
***********************************************************************
* *
* DESCRIPTION: *
* *
* READING OF ECMWF METEOROLOGICAL FIELDS FROM INPUT DATA FILES. THE *
* INPUT DATA FILES ARE EXPECTED TO BE AVAILABLE IN GRIB CODE *
* *
* INPUT: *
* indj indicates number of the wind field to be read in *
* n temporal index for meteorological fields (1 to 3)*
* *
* IMPORTANT VARIABLES FROM COMMON BLOCK: *
* *
* wfname File name of data to be read in *
* nxfield,ny,nuvz,nwz expected field dimensions *
* nlev_ec number of vertical levels ecmwf model *
* uu,vv,ww wind fields *
* tt,qq temperature and specific humidity *
* ps surface pressure *
* *
***********************************************************************
use GRIB_API
include 'includepar'
include 'includecom'
!HSO parameters for grib_api
integer ifile
integer iret
integer igrib
integer gribVer,parCat,parNum,typSurf,valSurf,discipl
integer gotGrid
character*24 gribErrorMsg
character*20 gribFunction
!HSO end
integer indj,i,j,k,n,levdiff2,ifield,iumax,iwmax,lunit
integer ix,jy,induvz,indwz
* 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
real*4 nsss(0:nxmax-1,0:nymax-1),ewss(0:nxmax-1,0:nymax-1)
real zsec2(60+2*nuvzmax),zsec3(2),zsec4(jpunp)
real xaux,yaux,xaux0,yaux0
real*8 xauxin,yauxin
real ylat,xlon,wdummy,ffpol,ddpol,xlonr
real uuaux,vvaux,uupolaux,vvpolaux
character*1 yoper,opt
logical error
!HSO grib api error messages
data gribErrorMsg/'Error reading grib file'/
data gribFunction/'readwind'/
data yoper/'D'/
levdiff2=nlev_ec-nwz+1
iumax=0
iwmax=0
*
* OPENING OF DATA FILE (GRIB CODE)
*
5 call grib_open_file(ifile,path(3)(1:len(3))
>//trim(wfname(indj)),'r',iret)
if (iret.ne.GRIB_SUCCESS) then
goto 888 ! ERROR DETECTED
endif
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 50 ! EOF DETECTED
elseif (iret.ne.GRIB_SUCCESS) then
goto 888 ! 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)
if (gribVer.eq.1) then ! GRIB Edition 1
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
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 ! indicatorOfParamete
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
!HSO 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
!HSO get the required fields from section 2 in a gribex compatible manner
if (ifield.eq.1) then
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_int(igrib,'numberOfVerticalCoordinateValues',
+ isec2(12))
call grib_check(iret,gribFunction,gribErrorMsg)
* CHECK GRID SPECIFICATIONS
if(isec2(2).ne.nxfield) stop 'READWIND: NX NOT CONSISTENT'
if(isec2(3).ne.ny) stop 'READWIND: NY NOT CONSISTENT'
if(isec2(12)/2-1.ne.nlev_ec)
+ stop 'READWIND: VERTICAL DISCRETIZATION NOT CONSISTENT'
endif ! ifield
!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,'longitudeOfFirstGridPointInDegrees',
> xauxin,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
call grib_get_real8(igrib,'latitudeOfLastGridPointInDegrees',
> yauxin,iret)
call grib_check(iret,gribFunction,gribErrorMsg)
xaux=xauxin
yaux=yauxin
xaux0=xlon0
yaux0=ylat0
if(xaux.lt.0.) xaux=xaux+360.
if(yaux.lt.0.) yaux=yaux+360.
if(xaux0.lt.0.) xaux0=xaux0+360.
if(yaux0.lt.0.) yaux0=yaux0+360.
if(abs(xaux-xaux0).gt.eps)
& stop 'READWIND: LOWER LEFT LONGITUDE NOT CONSISTENT'
if(abs(yaux-yaux0).gt.eps)
& stop 'READWIND: LOWER LEFT LATITUDE NOT CONSISTENT'
gotGrid=1
endif ! gotGrid
do 20 j=0,ny-1
do 20 i=0,nxfield-1
k=isec1(8)
if(isec1(6).eq.130) tt(i,j,nlev_ec-k+1,n)= !! TEMPERATURE
& zsec4(nxfield*(ny-j-1)+i+1)
if(isec1(6).eq.131) uu(i,j,nlev_ec-k+1,n)= !! U VELOCITY
& zsec4(nxfield*(ny-j-1)+i+1)
if(isec1(6).eq.132) vv(i,j,nlev_ec-k+1,n)= !! V VELOCITY
& zsec4(nxfield*(ny-j-1)+i+1)
if(isec1(6).eq.133) then
qq(i,j,nlev_ec-k+1,n)= !! SPEC. HUMIDITY
& zsec4(nxfield*(ny-j-1)+i+1)
if (qq(i,j,nlev_ec-k+1,n).lt.0.) qq(i,j,nlev_ec-k+1,n)=0.
c this is necessary because the gridded data may contain
c spurious negative values
endif
if(isec1(6).eq.134) ps(i,j,1,n)= !! SURF. PRESS.
& zsec4(nxfield*(ny-j-1)+i+1)
if(isec1(6).eq.135) ww(i,j,nlev_ec-k+1,n)= !! W VELOCITY
& zsec4(nxfield*(ny-j-1)+i+1)
if(isec1(6).eq.129) oro(i,j)= !! ECMWF OROGRAPHY
& zsec4(nxfield*(ny-j-1)+i+1)/ga
if(isec1(6).eq.131) iumax=max(iumax,nlev_ec-k+1)
if(isec1(6).eq.135) iwmax=max(iwmax,nlev_ec-k+1)
20 continue
call grib_release(igrib)
goto 10 !! READ NEXT LEVEL OR PARAMETER
*
* CLOSING OF INPUT DATA FILE
*
50 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
if(levdiff2.eq.0) then
iwmax=nlev_ec+1
do 60 j=0,ny-1
do 60 i=0,nx-1
60 ww(i,j,nlev_ec+1,n)=0.
endif
C For global fields, assign rightmost grid point the value of the
C leftmost point
*****************************************************************
if (xglobal) then
do 70 j=0,ny-1
oro(nx-1,j)=oro(0,j)
ps(nx-1,j,1,n)=ps(0,j,1,n)
do 71 induvz=1,nuvz
tt(nx-1,j,induvz,n)=tt(0,j,induvz,n)
qq(nx-1,j,induvz,n)=qq(0,j,induvz,n)
uu(nx-1,j,induvz,n)=uu(0,j,induvz,n)
71 vv(nx-1,j,induvz,n)=vv(0,j,induvz,n)
do 70 indwz=1,nwz
70 ww(nx-1,j,indwz,n)=ww(0,j,indwz,n)
endif
C If north pole is in the domain, calculate wind velocities in polar
C stereographic coordinates
********************************************************************
if (nglobal) then
do 74 jy=int(switchnorthg)-2,ny-1
ylat=ylat0+float(jy)*dy
do 74 ix=0,nx-1
xlon=xlon0+float(ix)*dx
do 74 induvz=1,nuvz
74 call cc2gll(northpolemap,ylat,xlon,uu(ix,jy,induvz,n),
+ vv(ix,jy,induvz,n),uupol(ix,jy,induvz,n),
+ vvpol(ix,jy,induvz,n))
do 76 induvz=1,nuvz
* CALCULATE FFPOL, DDPOL FOR CENTRAL GRID POINT
xlon=xlon0+float(nx/2-1)*dx
xlonr=xlon*pi/180.
ffpol=sqrt(uu(nx/2-1,ny-1,induvz,n)**2+
& vv(nx/2-1,ny-1,induvz,n)**2)
if(vv(nx/2-1,ny-1,induvz,n).lt.0.) then
ddpol=atan(uu(nx/2-1,ny-1,induvz,n)/
& vv(nx/2-1,ny-1,induvz,n))-xlonr
else
ddpol=pi+atan(uu(nx/2-1,ny-1,induvz,n)/
& vv(nx/2-1,ny-1,induvz,n))-xlonr
endif
if(ddpol.lt.0.) ddpol=2.0*pi+ddpol
if(ddpol.gt.2.0*pi) ddpol=ddpol-2.0*pi
* CALCULATE U,V FOR 180 DEG, TRANSFORM TO POLAR STEREOGRAPHIC GRID
xlon=180.0
xlonr=xlon*pi/180.
ylat=90.0
uuaux=-ffpol*sin(xlonr+ddpol)
vvaux=-ffpol*cos(xlonr+ddpol)
call cc2gll(northpolemap,ylat,xlon,uuaux,vvaux,uupolaux,
+ vvpolaux)
jy=ny-1
do 76 ix=0,nx-1
uupol(ix,jy,induvz,n)=uupolaux
vvpol(ix,jy,induvz,n)=vvpolaux
76 continue
* Fix: Set W at pole to the zonally averaged W of the next equator-
* ward parallel of latitude
do 85 indwz=1,nwz
wdummy=0.
jy=ny-2
do 80 ix=0,nx-1
80 wdummy=wdummy+ww(ix,jy,indwz,n)
wdummy=wdummy/float(nx)
jy=ny-1
do 85 ix=0,nx-1
85 ww(ix,jy,indwz,n)=wdummy
endif
C If south pole is in the domain, calculate wind velocities in polar
C stereographic coordinates
********************************************************************
if (sglobal) then
do 77 jy=0,int(switchsouthg)+3
ylat=ylat0+float(jy)*dy
do 77 ix=0,nx-1
xlon=xlon0+float(ix)*dx
do 77 induvz=1,nuvz
77 call cc2gll(southpolemap,ylat,xlon,uu(ix,jy,induvz,n),
+ vv(ix,jy,induvz,n),uupol(ix,jy,induvz,n),
+ vvpol(ix,jy,induvz,n))
do 79 induvz=1,nuvz
* CALCULATE FFPOL, DDPOL FOR CENTRAL GRID POINT
xlon=xlon0+float(nx/2-1)*dx
xlonr=xlon*pi/180.
ffpol=sqrt(uu(nx/2-1,0,induvz,n)**2+
& vv(nx/2-1,0,induvz,n)**2)
if(vv(nx/2-1,0,induvz,n).lt.0.) then
ddpol=atan(uu(nx/2-1,0,induvz,n)/
& vv(nx/2-1,0,induvz,n))+xlonr
else
ddpol=pi+atan(uu(nx/2-1,0,induvz,n)/
& vv(nx/2-1,0,induvz,n))+xlonr
endif
if(ddpol.lt.0.) ddpol=2.0*pi+ddpol
if(ddpol.gt.2.0*pi) ddpol=ddpol-2.0*pi
* CALCULATE U,V FOR 180 DEG, TRANSFORM TO POLAR STEREOGRAPHIC GRID
xlon=180.0
xlonr=xlon*pi/180.
ylat=-90.0
uuaux=+ffpol*sin(xlonr-ddpol)
vvaux=-ffpol*cos(xlonr-ddpol)
call cc2gll(northpolemap,ylat,xlon,uuaux,vvaux,uupolaux,
+ vvpolaux)
jy=0
do 79 ix=0,nx-1
uupol(ix,jy,induvz,n)=uupolaux
79 vvpol(ix,jy,induvz,n)=vvpolaux
* Fix: Set W at pole to the zonally averaged W of the next equator-
* ward parallel of latitude
do 95 indwz=1,nwz
wdummy=0.
jy=1
do 90 ix=0,nx-1
90 wdummy=wdummy+ww(ix,jy,indwz,n)
wdummy=wdummy/float(nx)
jy=0
do 95 ix=0,nx-1
95 ww(ix,jy,indwz,n)=wdummy
endif
if(iumax.ne.nuvz) stop 'READWIND: NUVZ NOT CONSISTENT'
if(iwmax.ne.nwz) stop 'READWIND: NWZ NOT CONSISTENT'
C Calculate potential temperature and potential vorticity on whole grid
***********************************************************************
call calcpv(n)
return
888 write(*,*) ' #### TRAJECTORY MODEL ERROR! WINDFIELD #### '
write(*,*) ' #### ',wfname(indj),' #### '
write(*,*) ' #### IS NOT GRIB FORMAT !!! #### '
stop 'Execution terminated'
999 write(*,*) ' #### TRAJECTORY MODEL ERROR! WINDFIELD #### '
write(*,*) ' #### ',wfname(indj),' #### '
write(*,*) ' #### CANNOT BE OPENED !!! #### '
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(*,'(a)') '!!! PLEASE CHECK CD-ROM LABEL AND !!!'
write(*,'(a)') '!!! CORRECT FILE "PATHNAMES"... !!!'
write(*,*)
read(*,'(a)') opt
if(opt.eq.'X') then
stop 'Execution terminated'
else
call readpaths(error)
if(error)
& stop 'Error reading "pathnames" --> execution terminated'
goto 5
endif
end
|
