| 0,0 → 1,894 |
|---|
| PROGRAM pv_to_qgpv |
| |
| c ******************************************************************************** |
| c * TRANSFORM ERTEL'S PV TO QUASI-GEOSTROPHIC PV * |
| c * Rene Fehlmann 1994 / Code re-organization: Michael Sprenger, 2006 * |
| c ******************************************************************************** |
| |
| c -------------------------------------------------------------------------------- |
| c Declaration of variables, parameters, externals and common blocks |
| c -------------------------------------------------------------------------------- |
| |
| implicit none |
| |
| c Input and output file |
| character*80 pvsrcfile |
| character*80 referfile |
| character*80 anomafile |
| |
| c Grid parameters |
| integer nx,ny,nz |
| real xmin,ymin,zmin,xmax,ymax,zmax |
| real dx,dy,dz |
| real mdv |
| |
| c Numerical and physical parameters |
| real pi180 ! Pi/180 |
| parameter (pi180=3.141592654/180.) |
| real rerd ! Earth's radius |
| parameter (rerd=6.371229e6) |
| real eps ! Numerical epsilon |
| parameter (eps=0.01) |
| real scale ! Scale for PV unit |
| parameter (scale=1e6) |
| real minagl ! No PV and qgPV below this height AGL |
| parameter (minagl=1000.) |
| |
| c Reference state and grid parameters |
| real, allocatable,dimension (:) :: nsqref |
| real, allocatable,dimension (:) :: thetaref |
| real, allocatable,dimension (:) :: rhoref |
| real, allocatable,dimension (:) :: pressref |
| real, allocatable,dimension (:) :: zref |
| real, allocatable,dimension (:,:) :: coriol |
| real, allocatable,dimension (:,:) :: oro |
| real deltax,deltay,deltaz |
| |
| c 3d fields for calculation of qgPV and Ertel's PV |
| real,allocatable,dimension (:,:,:) :: qgpv,pv1,pv2,pv |
| |
| c Auxiliary variables |
| real zpos |
| integer i,j,k |
| integer stat |
| character*80 varname |
| integer istep |
| real mean,rmsq,min,max |
| integer step |
| real,allocatable,dimension (:,:) :: tmp |
| |
| c -------------------------------------------------------------------------------- |
| c Input |
| c -------------------------------------------------------------------------------- |
| |
| print*,'********************************************************' |
| print*,'* PV_TO_QGPV *' |
| print*,'********************************************************' |
| |
| |
| c Read parameter file |
| open(10,file='fort.10') |
| read(10,*) pvsrcfile |
| read(10,*) referfile |
| read(10,*) anomafile |
| close(10) |
| print* |
| print*,trim(pvsrcfile) |
| print*,trim(referfile) |
| print*,trim(anomafile) |
| print* |
| |
| c Get lat/lon gid parameters from input file |
| call read_dim (nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv, |
| > pvsrcfile) |
| print*,'Read_Dim: nx,ny,nz = ',nx,ny,nz |
| print*,' dx,dy,dz = ',dx,dy,dz |
| print*,' xmin,ymin,zmin = ',xmin,ymin,zmin |
| print*,' mdv = ',mdv |
| print* |
| |
| c Count from 0, not from 1: consistent with <inv_cart.f>. |
| nx=nx-1 |
| ny=ny-1 |
| nz=nz-1 |
| |
| c Allocate memory for reference profile and grid parameters |
| allocate(rhoref (0:2*nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating rhoref' |
| allocate(pressref(0:2*nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating pressref' |
| allocate(thetaref(0:2*nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating thetaref' |
| allocate(nsqref (0:2*nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating nsqref' |
| allocate(zref (0:2*nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating zref' |
| allocate(coriol (0:nx,0:ny),STAT=stat) |
| if (stat.ne.0) print*,'error allocating coriol' |
| allocate(oro (0:nx,0:ny),STAT=stat) |
| if (stat.ne.0) print*,'error allocating oro' |
| |
| |
| c Allocate memory for calculation of qgPV and Ertel's PV |
| allocate(pv1 (0:nx,0:ny,0:nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating pv1' |
| allocate(pv2 (0:nx,0:ny,0:nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating pv2' |
| allocate(pv (0:nx,0:ny,0:nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating pv' |
| allocate(qgpv(0:nx,0:ny,0:nz),STAT=stat) |
| if (stat.ne.0) print*,'error allocating qgpv' |
| |
| c Allocate memory for temporary array |
| allocate(tmp(0:nx,0:ny),STAT=stat) |
| if (stat.ne.0) print*,'error allocating tmp' |
| |
| c -------------------------------------------------------------------------------- |
| c Calculate the qgPV from Ertel's PV and put it onto file |
| c -------------------------------------------------------------------------------- |
| |
| c Read data from file |
| varname='PV' |
| call read_inp (pv1,varname,pvsrcfile, |
| > nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv) |
| varname='PV_AIM' |
| call read_inp (pv2,varname,pvsrcfile, |
| > nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv) |
| |
| c Read reference profile and grid parameters |
| call read_ref (nsqref,rhoref,thetaref,pressref,zref, |
| > nx,ny,nz,deltax,deltay,deltaz,coriol,oro, |
| > referfile) |
| |
| c If the PV is negative, set it to zero |
| do i=0,nx |
| do j=0,ny |
| do k=0,nz |
| if (pv1(i,j,k).lt.0.) pv1(i,j,k)=0. |
| if (pv2(i,j,k).lt.0.) pv2(i,j,k)=0. |
| enddo |
| enddo |
| enddo |
| |
| c Get the difference of Ertel's PV and set all missing values to 0 |
| do i=0,nx |
| do j=0,ny |
| do k=0,nz |
| if ((abs(pv1(i,j,k)-mdv).gt.eps).and. |
| > (abs(pv2(i,j,k)-mdv).gt.eps)) then |
| pv(i,j,k)=pv1(i,j,k)-pv2(i,j,k) |
| else |
| pv(i,j,k)=0. |
| endif |
| enddo |
| enddo |
| enddo |
| |
| c Calculate qgPV |
| call epv_to_qgpv (qgpv,pv, |
| > rhoref,pressref,nsqref,thetaref, |
| > nx,ny,nz,mdv) |
| |
| c Set values on the boundaries to zero |
| do i=0,nx |
| do j=0,ny |
| qgpv(i,j, 0)=0. |
| qgpv(i,j,nz)=0. |
| enddo |
| enddo |
| do i=0,nx |
| do k=0,nz |
| qgpv(i, 0,k)=0. |
| qgpv(i,ny,k)=0. |
| enddo |
| enddo |
| do j=0,ny |
| do k=0,nz |
| qgpv( 0,j,k)=0. |
| qgpv(nx,j,k)=0. |
| enddo |
| enddo |
| |
| c Set all values to zero which are too near to the surface |
| do i=0,nx |
| do j=0,ny |
| do k=0,nz |
| zpos=zmin+real(k)*dz |
| if (zpos.lt.(oro(i,j)+minagl)) then |
| pv(i,j,k)=0. |
| qgpv(i,j,k)=0. |
| endif |
| enddo |
| enddo |
| enddo |
| |
| c Write result to netcdf file |
| varname='QGPV' |
| call write_inp (qgpv,varname,anomafile,nx,ny,nz) |
| varname='PV' |
| call write_inp (pv,varname,anomafile,nx,ny,nz) |
| |
| c Write some info |
| print* |
| print*,'PV -> qgPV: k z min max mean rmsq' |
| step=nz/10 |
| if (step.lt.1) step=1 |
| do k=0,nz,step |
| do i=0,nx |
| do j=0,ny |
| tmp(i,j)=qgpv(i,j,k) |
| enddo |
| enddo |
| call calc_error(min,max,mean,rmsq,tmp,nx,ny) |
| write(*,'(8x,i3,f10.1,4f10.2)') |
| > k,zmin+real(k)*dz,scale*min,scale*max, |
| > scale*mean,scale*rmsq |
| enddo |
| print* |
| |
| c -------------------------------------------------------------------------------- |
| c Format specifications |
| c -------------------------------------------------------------------------------- |
| |
| 111 format (5f20.9) |
| 106 format (2f20.9) |
| |
| end |
| |
| |
| c ******************************************************************************** |
| c * NETCDF INPUT AND OUTPUT * |
| c ******************************************************************************** |
| |
| c -------------------------------------------------------------------------------- |
| c Write input field to netcdf |
| c -------------------------------------------------------------------------------- |
| |
| SUBROUTINE write_inp (field,fieldname,pvsrcfile,nx,ny,nz) |
| |
| c Read <fieldname> from netcdf file <pvsrcfile> into <field>. The grid is specified |
| c by <nx,ny,nz,dx,dy,dz,xmin,ymin,zmin>. A check is performed whether the input |
| c files are consitent with this grid. |
| |
| implicit none |
| |
| c Declaration of subroutine parameters |
| integer nx,ny,nz |
| real field (0:nx,0:ny,0:nz) |
| character*80 fieldname |
| character*80 pvsrcfile |
| |
| c Auxiliary variables |
| integer cdfid,stat |
| integer vardim(4) |
| real misdat |
| real varmin(4),varmax(4),stag(4) |
| integer ndimin,outid,i,j,k |
| real tmp(0:nx,0:ny,0:nz) |
| integer ntimes |
| real time(200) |
| integer nvars |
| character*80 vnam(100),varname |
| integer isok |
| |
| c Get grid parameters from PV |
| call cdfopn(pvsrcfile,cdfid,stat) |
| if (stat.ne.0) goto 998 |
| call getvars(cdfid,nvars,vnam,stat) |
| if (stat.ne.0) goto 998 |
| isok=0 |
| varname='PV' |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 998 |
| call getdef(cdfid,varname,ndimin,misdat,vardim, |
| > varmin,varmax,stag,stat) |
| if (stat.ne.0) goto 998 |
| time(1)=0. |
| call gettimes(cdfid,time,ntimes,stat) |
| if (stat.ne.0) goto 998 |
| call clscdf(cdfid,stat) |
| if (stat.ne.0) goto 998 |
| |
| c Save variables (write definition, if necessary) |
| call cdfwopn(pvsrcfile,cdfid,stat) |
| if (stat.ne.0) goto 998 |
| isok=0 |
| varname=fieldname |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) then |
| call putdef(cdfid,varname,ndimin,misdat,vardim, |
| > varmin,varmax,stag,stat) |
| if (stat.ne.0) goto 998 |
| endif |
| call putdat(cdfid,varname,time(1),0,field,stat) |
| print*,'W ',trim(varname),' ',trim(pvsrcfile) |
| if (stat.ne.0) goto 998 |
| |
| c Close input netcdf file |
| call clscdf(cdfid,stat) |
| if (stat.ne.0) goto 998 |
| |
| return |
| |
| c Exception handling |
| 998 print*,'Write_Inp: Problem with input netcdf file... Stop' |
| stop |
| |
| end |
| |
| |
| c -------------------------------------------------------------------------------- |
| c Read input fields for reference profile |
| c -------------------------------------------------------------------------------- |
| |
| SUBROUTINE read_inp (field,fieldname,pvsrcfile, |
| > nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv) |
| |
| c Read <fieldname> from netcdf file <pvsrcfile> into <field>. The grid is specified |
| c by <nx,ny,nz,dx,dy,dz,xmin,ymin,zmin>. A check is performed whether the input |
| c files are consitent with this grid. The missing data value is set to <mdv>. |
| |
| implicit none |
| |
| c Declaration of subroutine parameters |
| integer nx,ny,nz |
| real field(0:nx,0:ny,0:nz) |
| character*80 fieldname |
| character*80 pvsrcfile |
| real dx,dy,dz,xmin,ymin,zmin |
| real mdv |
| |
| c Numerical and physical parameters |
| real eps |
| parameter (eps=0.01) |
| |
| c Auxiliary variables |
| integer cdfid,stat,cdfid99 |
| integer vardim(4) |
| real misdat |
| real varmin(4),varmax(4),stag(4) |
| integer ndimin,outid,i,j,k |
| real tmp(nx,ny,nz) |
| integer ntimes |
| real time(200) |
| integer nvars |
| character*80 vnam(100),varname |
| integer isok |
| |
| c Open the input netcdf file |
| call cdfopn(pvsrcfile,cdfid,stat) |
| if (stat.ne.0) goto 998 |
| |
| c Check whether needed variables are on file |
| call getvars(cdfid,nvars,vnam,stat) |
| if (stat.ne.0) goto 998 |
| isok=0 |
| varname=trim(fieldname) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 998 |
| |
| c Get the grid parameters from theta |
| call getdef(cdfid,varname,ndimin,misdat,vardim, |
| > varmin,varmax,stag,stat) |
| if (stat.ne.0) goto 998 |
| time(1)=0. |
| call gettimes(cdfid,time,ntimes,stat) |
| if (stat.ne.0) goto 998 |
| |
| c Check whether grid parameters are consistent |
| if ( (vardim(1).ne.(nx+1)).or. |
| > (vardim(2).ne.(ny+1)).or. |
| > (vardim(3).ne.(nz+1)).or. |
| > (abs(varmin(1)-xmin).gt.eps).or. |
| > (abs(varmin(2)-ymin).gt.eps).or. |
| > (abs(varmin(3)-zmin).gt.eps).or. |
| > (abs((varmax(1)-varmin(1))/real(vardim(1)-1)-dx).gt.eps).or. |
| > (abs((varmax(2)-varmin(2))/real(vardim(2)-1)-dy).gt.eps).or. |
| > (abs((varmax(3)-varmin(3))/real(vardim(3)-1)-dz).gt.eps) ) |
| >then |
| print*,'Input grid inconsitency...' |
| print*,' Nx = ',vardim(1),nx+1 |
| print*,' Ny = ',vardim(2),ny+1 |
| print*,' Nz = ',vardim(3),nz+1 |
| print*,' Varminx = ',varmin(1),xmin |
| print*,' Varminy = ',varmin(2),ymin |
| print*,' Varminz = ',varmin(3),zmin |
| print*,' Dx = ',(varmax(1)-varmin(1))/real(nx-1),dx |
| print*,' Dy = ',(varmax(2)-varmin(2))/real(ny-1),dy |
| print*,' Dz = ',(varmax(3)-varmin(3))/real(nz-1),dz |
| goto 998 |
| endif |
| |
| c Load variables |
| call getdef(cdfid,varname,ndimin,misdat,vardim, |
| > varmin,varmax,stag,stat) |
| if (stat.ne.0) goto 998 |
| call getdat(cdfid,varname,time(1),0,field,stat) |
| print*, 'R ',trim(varname),' ',trim(pvsrcfile) |
| if (stat.ne.0) goto 998 |
| |
| c Close input netcdf file |
| call clscdf(cdfid,stat) |
| if (stat.ne.0) goto 998 |
| |
| c Set missing data value to <mdv> |
| do i=1,nx |
| do j=1,ny |
| do k=1,nz |
| if (abs(field(i,j,k)-misdat).lt.eps) then |
| field(i,j,k)=mdv |
| endif |
| enddo |
| enddo |
| enddo |
| |
| return |
| |
| c Exception handling |
| 998 print*,'Read_Inp: Problem with input netcdf file... Stop' |
| stop |
| |
| end |
| |
| c -------------------------------------------------------------------------------- |
| c Read refernece profile from netcdf |
| c -------------------------------------------------------------------------------- |
| |
| SUBROUTINE read_ref (nsqref,rhoref,thetaref,pressref,zref, |
| > nx,ny,nz,deltax,deltay,deltaz,coriol,oro, |
| > pvsrcfile) |
| |
| c Read the reference profile from file |
| c |
| c thetaref : Reference potential temperature (K) |
| c pressref : Reference pressure (Pa) |
| c rhoref : Reference density (kg/m^3) |
| c nsqref : Stratification (s^-1) |
| c zref : Reference height (m) |
| c nx,nny,nz : Grid dimension in x,y,z direction |
| c deltax,deltay,deltaz : Grid spacings used for calculations (m) |
| c coriol : Coriolis parameter (s^-1) |
| c oro : Height of orography (m) |
| c pvsrcfile : Input file |
| |
| implicit none |
| |
| c Declaration of subroutine parameters |
| integer nx,ny,nz |
| real nsqref (0:2*nz) |
| real thetaref(0:2*nz) |
| real rhoref (0:2*nz) |
| real pressref(0:2*nz) |
| real zref (0:2*nz) |
| real deltax,deltay,deltaz |
| real coriol (0:nx,0:ny) |
| real oro (0:nx,0:ny) |
| character*80 pvsrcfile |
| |
| c Numerical and physical parameters |
| real eps |
| parameter (eps=0.01) |
| |
| c Auxiliary variables |
| integer cdfid,stat |
| integer vardim(4) |
| real misdat |
| integer ndimin |
| real varmin(4),varmax(4),stag(4) |
| integer i,j,k,nf1 |
| integer ntimes |
| real time(200) |
| character*80 vnam(100),varname |
| integer nvars |
| integer isok,ierr |
| real x(0:nx,0:ny),y(0:nx,0:ny) |
| real mean,count |
| |
| c Get grid description from topography |
| call cdfopn(pvsrcfile,cdfid,stat) |
| if (stat.ne.0) goto 997 |
| call getvars(cdfid,nvars,vnam,stat) |
| if (stat.ne.0) goto 997 |
| isok=0 |
| varname='ORO' |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdef(cdfid,varname,ndimin,misdat,vardim, |
| > varmin,varmax,stag,stat) |
| if (stat.ne.0) goto 997 |
| time(1)=0. |
| call gettimes(cdfid,time,ntimes,stat) |
| if (stat.ne.0) goto 997 |
| call clscdf(cdfid,stat) |
| if (stat.ne.0) goto 997 |
| |
| c Open output netcdf file |
| call cdfopn(pvsrcfile,cdfid,stat) |
| if (stat.ne.0) goto 997 |
| |
| c Create the variable if necessary |
| call getvars(cdfid,nvars,vnam,stat) |
| if (stat.ne.0) goto 997 |
| |
| c Read data from netcdf file |
| isok=0 |
| varname='NSQREF' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,nsqref,stat) |
| if (stat.ne.0) goto 997 |
| |
| isok=0 |
| varname='RHOREF' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,rhoref,stat) |
| if (stat.ne.0) goto 997 |
| |
| isok=0 |
| varname='THETAREF' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,thetaref,stat) |
| if (stat.ne.0) goto 997 |
| |
| isok=0 |
| varname='PREREF' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,pressref,stat) |
| if (stat.ne.0) goto 997 |
| |
| isok=0 |
| varname='ZREF' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,zref,stat) |
| if (stat.ne.0) goto 997 |
| |
| isok=0 |
| varname='CORIOL' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,coriol,stat) |
| if (stat.ne.0) goto 997 |
| |
| isok=0 |
| varname='ORO' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,oro,stat) |
| if (stat.ne.0) goto 997 |
| |
| isok=0 |
| varname='X' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,x,stat) |
| if (stat.ne.0) goto 997 |
| |
| isok=0 |
| varname='Y' |
| print*,'R ',trim(varname),' ',trim(pvsrcfile) |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 997 |
| call getdat(cdfid,varname,time(1),0,y,stat) |
| if (stat.ne.0) goto 997 |
| |
| c Close netcdf file |
| call clscdf(cdfid,stat) |
| if (stat.ne.0) goto 997 |
| |
| c Determine the grid spacings <deltax, deltay, deltaz> |
| mean=0. |
| count=0. |
| do i=1,nx |
| do j=0,ny |
| mean=mean+abs(x(i)-x(i-1)) |
| count=count+1. |
| enddo |
| enddo |
| deltax=mean/count |
| |
| mean=0. |
| count=0. |
| do j=1,ny |
| do i=0,nx |
| mean=mean+abs(y(j)-y(j-1)) |
| count=count+1. |
| enddo |
| enddo |
| deltay=mean/count |
| |
| mean=0. |
| count=0. |
| do k=1,nz-1 |
| mean=mean+abs(zref(k+1)-zref(k-1)) |
| count=count+1. |
| enddo |
| deltaz=mean/count |
| |
| return |
| |
| c Exception handling |
| 997 print*,'Read_Ref: Problem with input netcdf file... Stop' |
| stop |
| |
| end |
| |
| c -------------------------------------------------------------------------------- |
| c Check whether variable is found on netcdf file |
| c -------------------------------------------------------------------------------- |
| |
| subroutine check_varok (isok,varname,varlist,nvars) |
| |
| c Check whether the variable <varname> is in the list <varlist(nvars)>. If this is |
| C the case, <isok> is incremented by 1. Otherwise <isok> keeps its value. |
| |
| implicit none |
| |
| c Declaraion of subroutine parameters |
| integer isok |
| integer nvars |
| character*80 varname |
| character*80 varlist(nvars) |
| |
| c Auxiliary variables |
| integer i |
| |
| c Main |
| do i=1,nvars |
| if (trim(varname).eq.trim(varlist(i))) isok=isok+1 |
| enddo |
| |
| end |
| |
| c -------------------------------------------------------------------------------- |
| c Get grid parameters |
| c -------------------------------------------------------------------------------- |
| |
| subroutine read_dim (nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv, |
| > pvsrcfile) |
| |
| c Get the grid parameters from the variable <THETA> on the input file <pvsrcfile>. |
| c The grid parameters are |
| c nx,ny,nz : Number of grid points in x, y and z direction |
| c xmin,ymin,zmin : Minimum domain coordinates in x, y and z direction |
| c xmax,ymax,zmax : Maximal domain coordinates in x, y and z direction |
| c dx,dy,dz : Horizontal and vertical resolution |
| c Additionally, it is checked whether the vertical grid is equally spaced. If ok, |
| c the grid paramters are transformed from lon/lat to distance (in meters) |
| |
| implicit none |
| |
| c Declaration of subroutine parameters |
| character*80 pvsrcfile |
| integer nx,ny,nz |
| real dx,dy,dz |
| real xmin,ymin,zmin,xmax,ymax,zmax |
| real mdv |
| |
| c Numerical epsilon and other physical/geoemtrical parameters |
| real eps |
| parameter (eps=0.01) |
| |
| c Auxiliary variables |
| integer cdfid,cstid |
| integer ierr |
| character*80 vnam(100),varname |
| integer nvars |
| integer isok |
| integer vardim(4) |
| real misdat |
| real varmin(4),varmax(4),stag(4) |
| real aklev(1000),bklev(1000),aklay(1000),bklay(1000) |
| real dh |
| character*80 csn |
| integer ndim |
| integer i |
| |
| c Get all grid parameters |
| call cdfopn(pvsrcfile,cdfid,ierr) |
| if (ierr.ne.0) goto 998 |
| call getvars(cdfid,nvars,vnam,ierr) |
| if (ierr.ne.0) goto 998 |
| isok=0 |
| varname='PV' |
| call check_varok(isok,varname,vnam,nvars) |
| if (isok.eq.0) goto 998 |
| call getcfn(cdfid,csn,ierr) |
| if (ierr.ne.0) goto 998 |
| call cdfopn(csn,cstid,ierr) |
| if (ierr.ne.0) goto 998 |
| call getdef(cdfid,varname,ndim,misdat,vardim,varmin,varmax, |
| > stag,ierr) |
| if (ierr.ne.0) goto 998 |
| nx=vardim(1) |
| ny=vardim(2) |
| nz=vardim(3) |
| xmin=varmin(1) |
| ymin=varmin(2) |
| zmin=varmin(3) |
| call getlevs(cstid,nz,aklev,bklev,aklay,bklay,ierr) |
| if (ierr.ne.0) goto 998 |
| call getgrid(cstid,dx,dy,ierr) |
| if (ierr.ne.0) goto 998 |
| xmax=varmax(1) |
| ymax=varmax(2) |
| zmax=varmax(3) |
| dz=(zmax-zmin)/real(nz-1) |
| call clscdf(cstid,ierr) |
| if (ierr.ne.0) goto 998 |
| call clscdf(cdfid,ierr) |
| if (ierr.ne.0) goto 998 |
| |
| c Check whether the grid is equallay spaced in the vertical |
| do i=1,nz-1 |
| dh=aklev(i+1)-aklev(i) |
| if (abs(dh-dz).gt.eps) then |
| print*,'Aklev: Vertical grid must be equally spaced... Stop' |
| print*,(aklev(i),i=1,nz) |
| stop |
| endif |
| dh=aklay(i+1)-aklay(i) |
| if (abs(dh-dz).gt.eps) then |
| print*,'Aklay: Vertical grid must be equally spaced... Stop' |
| print*,(aklay(i),i=1,nz) |
| stop |
| endif |
| enddo |
| |
| c Set missing data value |
| mdv=misdat |
| |
| return |
| |
| c Exception handling |
| 998 print*,'Read_Dim: Problem with input netcdf file... Stop' |
| stop |
| |
| end |
| |
| |
| c ******************************************************************************** |
| c * CALCULATION * |
| c ******************************************************************************** |
| |
| c -------------------------------------------------------------------------------- |
| c Calculate qgPV from Ertels's PV |
| c -------------------------------------------------------------------------------- |
| |
| subroutine epv_to_qgpv (qgpv,pv, |
| > rhoref,pressref,nsqref,thetaref, |
| > nx,ny,nz,mdv) |
| |
| c Calculate the qgPV from Ertel's PV according to equation 2.11 p16, Thesis |
| c from Rene Fehlmann. |
| |
| implicit none |
| |
| c Declaration of subroutine parameters |
| integer nx,ny,nz |
| real qgpv(0:nx,0:ny,0:nz),pv(0:nx,0:ny,0:nz) |
| real rhoref (0:2*nz) |
| real nsqref (0:2*nz) |
| real thetaref(0:2*nz) |
| real pressref(0:2*nz) |
| real mdv |
| |
| c Numerical epsilon |
| real g |
| parameter (g=9.81) |
| real eps |
| parameter (eps=0.01) |
| real scale |
| parameter (scale=1e6) |
| |
| c Auxiliary variables |
| integer i,j,k |
| integer kk |
| |
| c Calculation |
| do i=0,nx |
| do j=0,ny |
| do k=0,nz |
| |
| kk=2*k |
| |
| if (( abs(rhoref(kk) -mdv).gt.eps).and. |
| > ( abs(thetaref(kk)-mdv).gt.eps).and. |
| > ( abs(nsqref(kk) -mdv).gt.eps).and. |
| > ( abs(pv(i,j,k) -mdv).gt.eps)) then |
| |
| qgpv(i,j,k)=rhoref(kk)*g*pv(i,j,k)/thetaref(kk)/ |
| > nsqref(kk)/scale |
| |
| else |
| qgpv(i,j,k)=0. |
| endif |
| |
| enddo |
| enddo |
| enddo |
| |
| end |
| |
| c -------------------------------------------------------------------------------- |
| c Calculate error statistics |
| c -------------------------------------------------------------------------------- |
| |
| subroutine calc_error (min,max,mean,rmsq,tmp,nx,ny) |
| |
| c Calculate the error statistics for the two-dimensional error field <tmp>. The |
| c following error measures are calculated: the minimum <min>, the maximum <max>, |
| c the mean <mean>, the root-mean square <rmsq> |
| |
| implicit none |
| |
| c Declaration of subroutine parameters |
| integer nx,ny |
| real tmp(0:nx,0:ny) |
| real mean,rmsq |
| real min,max |
| |
| c Auxiliary variables |
| integer i,j |
| real sum |
| integer cnt |
| |
| c Calculate the minimum and maximum |
| min=tmp(0,0) |
| max=tmp(0,0) |
| do i=0,nx |
| do j=0,ny |
| if (tmp(i,j).lt.min) min=tmp(i,j) |
| if (tmp(i,j).gt.max) max=tmp(i,j) |
| enddo |
| enddo |
| |
| c Calculate the mean |
| sum=0. |
| cnt=0 |
| do i=0,nx |
| do j=0,ny |
| cnt=cnt+1 |
| sum=sum+tmp(i,j) |
| enddo |
| enddo |
| if (cnt.ge.1) then |
| mean=sum/real(cnt) |
| else |
| mean=0. |
| endif |
| |
| c Calculate rmsq |
| rmsq=0. |
| cnt=0 |
| do i=0,nx |
| do j=0,ny |
| cnt=cnt+1 |
| rmsq=rmsq+(tmp(i,j)-mean)**2 |
| enddo |
| enddo |
| if (cnt.ge.1) then |
| rmsq=1./real(cnt)*sqrt(rmsq) |
| else |
| rmsq=0. |
| endif |
| |
| end |
| |
| |
| |
| |
| |
| |
| |
| Property changes: |
|---|
| Added: svn:executable |
|---|