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michaesp |
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PROGRAM prep_iteration
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c ************************************************************************
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c * Prepare the next step for the PV inversion *
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c * Michael Sprenger / Summer, Autumn 2006 *
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c ************************************************************************
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implicit none
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c ------------------------------------------------------------------------
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c Declaration of variables and parameters
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c ------------------------------------------------------------------------
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c Input and output file
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character*80 anomafile
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character*80 iterafile
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c Grid parameters
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integer nx,ny,nz
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real xmin,ymin,zmin,xmax,ymax,zmax
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real dx,dy,dz
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real mdv
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c Numerical epsilon and other variables
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real eps
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parameter (eps=0.01)
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real alpha
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c 3d arrays
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real,allocatable,dimension (:,:,:) :: v_iter,v_anom
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real,allocatable,dimension (:,:,:) :: u_iter,u_anom
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real,allocatable,dimension (:,:,:) :: t_iter,t_anom
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real,allocatable,dimension (:,:,:) :: p_iter,p_anom
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c Auciliary variables
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integer i,j,k
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integer stat
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character*80 varname
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character*80 name
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c --------------------------------------------------------------------------------
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c Input
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c --------------------------------------------------------------------------------
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print*,'********************************************************'
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print*,'* PREP_ITERATION *'
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print*,'********************************************************'
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c Read parameter file
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open(10,file='fort.10')
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read(10,*) iterafile
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read(10,*) anomafile
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read(10,*) name,alpha
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if ( trim(name).ne.'ALPHA' ) stop
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close(10)
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print*
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print*,trim(anomafile)
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print*,trim(iterafile)
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print*
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c Get lat/lon gid parameters from input file
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call read_dim (nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv,
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> anomafile)
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print*,'Read_Dim: nx,ny,nz = ',nx,ny,nz
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print*,' dx,dy,dz = ',dx,dy,dz
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print*,' xmin,ymin,zmin = ',xmin,ymin,zmin
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print*,' mdv = ',mdv
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print*
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c Count from 0, not from 1: consistent with <inv_cart.f>.
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nx=nx-1
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ny=ny-1
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nz=nz-1
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c Allocate memory for 3d arrays
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allocate(u_anom (0:nx,0:ny,0:nz),STAT=stat)
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if (stat.ne.0) print*,'error allocating u_anom'
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allocate(v_anom (0:nx,0:ny,0:nz),STAT=stat)
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if (stat.ne.0) print*,'error allocating v_anom'
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allocate(t_anom (0:nx,0:ny,0:nz),STAT=stat)
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if (stat.ne.0) print*,'error allocating t_anom'
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allocate(p_anom (0:nx,0:ny,0:nz),STAT=stat)
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if (stat.ne.0) print*,'error allocating p_anom'
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allocate(u_iter (0:nx,0:ny,0:nz),STAT=stat)
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if (stat.ne.0) print*,'error allocating u_iter'
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allocate(v_iter (0:nx,0:ny,0:nz),STAT=stat)
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if (stat.ne.0) print*,'error allocating v_iter'
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allocate(t_iter (0:nx,0:ny,0:nz),STAT=stat)
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if (stat.ne.0) print*,'error allocating t_iter'
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allocate(p_iter (0:nx,0:ny,0:nz),STAT=stat)
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if (stat.ne.0) print*,'error allocating p_iter'
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c Read anomaly and iteration fields
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varname='U'
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call read_inp (u_anom,varname,anomafile,
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> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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varname='V'
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call read_inp (v_anom,varname,anomafile,
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> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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varname='T'
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call read_inp (t_anom,varname,anomafile,
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> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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varname='P'
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call read_inp (p_anom,varname,anomafile,
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> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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varname='U'
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call read_inp (u_iter,varname,iterafile,
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> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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varname='V'
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call read_inp (v_iter,varname,iterafile,
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> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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varname='T'
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call read_inp (t_iter,varname,iterafile,
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> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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varname='P'
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call read_inp (p_iter,varname,iterafile,
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> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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c --------------------------------------------------------------------------------
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c Modify the iteration fields
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c --------------------------------------------------------------------------------
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do i=0,nx
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do j=0,ny
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do k=0,nz
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c Update zonal velocity
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if ((abs(u_anom(i,j,k)-mdv).gt.eps).and.
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> (abs(u_iter(i,j,k)-mdv).gt.eps)) then
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u_iter(i,j,k)=u_iter(i,j,k)-alpha*u_anom(i,j,k)
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else
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u_iter(i,j,k)=mdv
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endif
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c Update meridional velocity
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if ((abs(v_anom(i,j,k)-mdv).gt.eps).and.
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> (abs(v_iter(i,j,k)-mdv).gt.eps)) then
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v_iter(i,j,k)=v_iter(i,j,k)-alpha*v_anom(i,j,k)
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else
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v_iter(i,j,k)=mdv
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endif
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c Update temperature
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if ((abs(t_anom(i,j,k)-mdv).gt.eps).and.
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> (abs(t_iter(i,j,k)-mdv).gt.eps)) then
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t_iter(i,j,k)=t_iter(i,j,k)-alpha*t_anom(i,j,k)
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else
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t_iter(i,j,k)=mdv
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endif
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c Update pressure
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if ((abs(p_anom(i,j,k)-mdv).gt.eps).and.
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> (abs(p_iter(i,j,k)-mdv).gt.eps)) then
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p_iter(i,j,k)=p_iter(i,j,k)-alpha*p_anom(i,j,k)
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else
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p_iter(i,j,k)=mdv
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endif
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enddo
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enddo
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enddo
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c --------------------------------------------------------------------------------
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c Write output
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c --------------------------------------------------------------------------------
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varname='U'
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call write_inp (u_iter,varname,iterafile,nx,ny,nz)
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varname='V'
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call write_inp (v_iter,varname,iterafile,nx,ny,nz)
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varname='T'
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call write_inp (t_iter,varname,iterafile,nx,ny,nz)
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varname='P'
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call write_inp (p_iter,varname,iterafile,nx,ny,nz)
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end
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c ********************************************************************************
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c * NETCDF INPUT AND OUTPUT *
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c ********************************************************************************
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c --------------------------------------------------------------------------------
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c Write input field to netcdf
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c --------------------------------------------------------------------------------
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SUBROUTINE write_inp (field,fieldname,pvsrcfile,nx,ny,nz)
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c Read <fieldname> from netcdf file <pvsrcfile> into <field>. The grid is specified
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c by <nx,ny,nz,dx,dy,dz,xmin,ymin,zmin>. A check is performed whether the input
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c files are consitent with this grid.
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implicit none
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c Declaration of subroutine parameters
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integer nx,ny,nz
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real field (0:nx,0:ny,0:nz)
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character*80 fieldname
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character*80 pvsrcfile
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c Auxiliary variables
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integer cdfid,stat
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integer vardim(4)
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real misdat
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real varmin(4),varmax(4),stag(4)
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integer ndimin,outid,i,j,k
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real max_th
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real tmp(0:nx,0:ny,0:nz)
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integer ntimes
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real time(200)
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integer nvars
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character*80 vnam(100),varname
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integer isok
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c Get grid parameters
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call cdfopn(pvsrcfile,cdfid,stat)
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if (stat.ne.0) goto 998
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call getvars(cdfid,nvars,vnam,stat)
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if (stat.ne.0) goto 998
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isok=0
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varname='TH'
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call check_varok(isok,varname,vnam,nvars)
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if (isok.eq.0) goto 998
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call getdef(cdfid,varname,ndimin,misdat,vardim,
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> varmin,varmax,stag,stat)
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if (stat.ne.0) goto 998
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time(1)=0.
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call gettimes(cdfid,time,ntimes,stat)
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if (stat.ne.0) goto 998
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call clscdf(cdfid,stat)
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if (stat.ne.0) goto 998
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c Save variables (write definition, if necessary)
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call cdfwopn(pvsrcfile,cdfid,stat)
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if (stat.ne.0) goto 998
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isok=0
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varname=fieldname
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call check_varok(isok,varname,vnam,nvars)
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if (isok.eq.0) then
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call putdef(cdfid,varname,ndimin,misdat,vardim,
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> varmin,varmax,stag,stat)
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if (stat.ne.0) goto 998
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endif
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call putdat(cdfid,varname,time(1),0,field,stat)
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print*,'W ',trim(varname),' ',trim(pvsrcfile)
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if (stat.ne.0) goto 998
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c Close input netcdf file
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call clscdf(cdfid,stat)
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if (stat.ne.0) goto 998
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return
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c Exception handling
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998 print*,'Write_Inp: Problem with input netcdf file... Stop'
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stop
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end
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c --------------------------------------------------------------------------------
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c Read input fields for reference profile
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c --------------------------------------------------------------------------------
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SUBROUTINE read_inp (field,fieldname,pvsrcfile,
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271 |
> nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv)
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c Read <fieldname> from netcdf file <pvsrcfile> into <field>. The grid is specified
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c by <nx,ny,nz,dx,dy,dz,xmin,ymin,zmin>. A check is performed whether the input
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c files are consitent with this grid. The missing data value is set to <mdv>.
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implicit none
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278 |
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279 |
c Declaration of subroutine parameters
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280 |
integer nx,ny,nz
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281 |
real field(0:nx,0:ny,0:nz)
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282 |
character*80 fieldname
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283 |
character*80 pvsrcfile
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real dx,dy,dz,xmin,ymin,zmin
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285 |
real mdv
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286 |
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287 |
c Numerical and physical parameters
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288 |
real eps
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parameter (eps=0.01)
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290 |
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291 |
c Auxiliary variables
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292 |
integer cdfid,stat,cdfid99
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293 |
integer vardim(4)
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294 |
real misdat
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295 |
real varmin(4),varmax(4),stag(4)
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296 |
integer ndimin,outid,i,j,k
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297 |
real max_th
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298 |
real tmp(nx,ny,nz)
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299 |
integer ntimes
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300 |
real time(200)
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301 |
integer nvars
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302 |
character*80 vnam(100),varname
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303 |
integer isok
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304 |
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305 |
c Open the input netcdf file
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306 |
call cdfopn(pvsrcfile,cdfid,stat)
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307 |
if (stat.ne.0) goto 998
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308 |
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309 |
c Check whether needed variables are on file
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310 |
call getvars(cdfid,nvars,vnam,stat)
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311 |
if (stat.ne.0) goto 998
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312 |
isok=0
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313 |
varname=trim(fieldname)
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314 |
call check_varok(isok,varname,vnam,nvars)
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315 |
if (isok.eq.0) goto 998
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316 |
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317 |
c Get the grid parameters from theta
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318 |
call getdef(cdfid,varname,ndimin,misdat,vardim,
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319 |
> varmin,varmax,stag,stat)
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320 |
if (stat.ne.0) goto 998
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time(1)=0.
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322 |
call gettimes(cdfid,time,ntimes,stat)
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if (stat.ne.0) goto 998
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324 |
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c Check whether grid parameters are consistent
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326 |
if ( (vardim(1).ne.(nx+1)).or.
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> (vardim(2).ne.(ny+1)).or.
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328 |
> (vardim(3).ne.(nz+1)).or.
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329 |
> (abs(varmin(1)-xmin).gt.eps).or.
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> (abs(varmin(2)-ymin).gt.eps).or.
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> (abs(varmin(3)-zmin).gt.eps).or.
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> (abs((varmax(1)-varmin(1))/real(vardim(1)-1)-dx).gt.eps).or.
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> (abs((varmax(2)-varmin(2))/real(vardim(2)-1)-dy).gt.eps).or.
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334 |
> (abs((varmax(3)-varmin(3))/real(vardim(3)-1)-dz).gt.eps) )
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335 |
>then
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336 |
print*,'Input grid inconsitency...'
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337 |
print*,' Nx = ',vardim(1),nx+1
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338 |
print*,' Ny = ',vardim(2),ny+1
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339 |
print*,' Nz = ',vardim(3),nz+1
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340 |
print*,' Varminx = ',varmin(1),xmin
|
|
|
341 |
print*,' Varminy = ',varmin(2),ymin
|
|
|
342 |
print*,' Varminz = ',varmin(3),zmin
|
|
|
343 |
print*,' Dx = ',(varmax(1)-varmin(1))/real(nx-1),dx
|
|
|
344 |
print*,' Dy = ',(varmax(2)-varmin(2))/real(ny-1),dy
|
|
|
345 |
print*,' Dz = ',(varmax(3)-varmin(3))/real(nz-1),dz
|
|
|
346 |
goto 998
|
|
|
347 |
endif
|
|
|
348 |
|
|
|
349 |
c Load variables
|
|
|
350 |
call getdef(cdfid,varname,ndimin,misdat,vardim,
|
|
|
351 |
> varmin,varmax,stag,stat)
|
|
|
352 |
if (stat.ne.0) goto 998
|
|
|
353 |
call getdat(cdfid,varname,time(1),0,field,stat)
|
|
|
354 |
print*, 'R ',trim(varname),' ',trim(pvsrcfile)
|
|
|
355 |
if (stat.ne.0) goto 998
|
|
|
356 |
|
|
|
357 |
c Close input netcdf file
|
|
|
358 |
call clscdf(cdfid,stat)
|
|
|
359 |
if (stat.ne.0) goto 998
|
|
|
360 |
|
|
|
361 |
c Set missing data value to <mdv>
|
|
|
362 |
do i=1,nx
|
|
|
363 |
do j=1,ny
|
|
|
364 |
do k=1,nz
|
|
|
365 |
if (abs(field(i,j,k)-misdat).lt.eps) then
|
|
|
366 |
field(i,j,k)=mdv
|
|
|
367 |
endif
|
|
|
368 |
enddo
|
|
|
369 |
enddo
|
|
|
370 |
enddo
|
|
|
371 |
|
|
|
372 |
return
|
|
|
373 |
|
|
|
374 |
c Exception handling
|
|
|
375 |
998 print*,'Read_Inp: Problem with input netcdf file... Stop'
|
|
|
376 |
stop
|
|
|
377 |
|
|
|
378 |
end
|
|
|
379 |
|
|
|
380 |
c --------------------------------------------------------------------------------
|
|
|
381 |
c Check whether variable is found on netcdf file
|
|
|
382 |
c --------------------------------------------------------------------------------
|
|
|
383 |
|
|
|
384 |
subroutine check_varok (isok,varname,varlist,nvars)
|
|
|
385 |
|
|
|
386 |
c Check whether the variable <varname> is in the list <varlist(nvars)>. If this is
|
|
|
387 |
C the case, <isok> is incremented by 1. Otherwise <isok> keeps its value.
|
|
|
388 |
|
|
|
389 |
implicit none
|
|
|
390 |
|
|
|
391 |
c Declaraion of subroutine parameters
|
|
|
392 |
integer isok
|
|
|
393 |
integer nvars
|
|
|
394 |
character*80 varname
|
|
|
395 |
character*80 varlist(nvars)
|
|
|
396 |
|
|
|
397 |
c Auxiliary variables
|
|
|
398 |
integer i
|
|
|
399 |
|
|
|
400 |
c Main
|
|
|
401 |
do i=1,nvars
|
|
|
402 |
if (trim(varname).eq.trim(varlist(i))) isok=isok+1
|
|
|
403 |
enddo
|
|
|
404 |
|
|
|
405 |
end
|
|
|
406 |
|
|
|
407 |
c --------------------------------------------------------------------------------
|
|
|
408 |
c Get grid parameters
|
|
|
409 |
c --------------------------------------------------------------------------------
|
|
|
410 |
|
|
|
411 |
subroutine read_dim (nx,ny,nz,dx,dy,dz,xmin,ymin,zmin,mdv,
|
|
|
412 |
> pvsrcfile)
|
|
|
413 |
|
|
|
414 |
c Get the grid parameters from the variable <THETA> on the input file <pvsrcfile>.
|
|
|
415 |
c The grid parameters are
|
|
|
416 |
c nx,ny,nz : Number of grid points in x, y and z direction
|
|
|
417 |
c xmin,ymin,zmin : Minimum domain coordinates in x, y and z direction
|
|
|
418 |
c xmax,ymax,zmax : Maximal domain coordinates in x, y and z direction
|
|
|
419 |
c dx,dy,dz : Horizontal and vertical resolution
|
|
|
420 |
c Additionally, it is checked whether the vertical grid is equally spaced. If ok,
|
|
|
421 |
c the grid paramters are transformed from lon/lat to distance (in meters)
|
|
|
422 |
|
|
|
423 |
implicit none
|
|
|
424 |
|
|
|
425 |
c Declaration of subroutine parameters
|
|
|
426 |
character*80 pvsrcfile
|
|
|
427 |
integer nx,ny,nz
|
|
|
428 |
real dx,dy,dz
|
|
|
429 |
real xmin,ymin,zmin,xmax,ymax,zmax
|
|
|
430 |
real mdv
|
|
|
431 |
|
|
|
432 |
c Numerical epsilon and other physical/geoemtrical parameters
|
|
|
433 |
real eps
|
|
|
434 |
parameter (eps=0.01)
|
|
|
435 |
|
|
|
436 |
c Auxiliary variables
|
|
|
437 |
integer cdfid,cstid
|
|
|
438 |
integer ierr
|
|
|
439 |
character*80 vnam(100),varname
|
|
|
440 |
integer nvars
|
|
|
441 |
integer isok
|
|
|
442 |
integer vardim(4)
|
|
|
443 |
real misdat
|
|
|
444 |
real varmin(4),varmax(4),stag(4)
|
|
|
445 |
real aklev(1000),bklev(1000),aklay(1000),bklay(1000)
|
|
|
446 |
real dh
|
|
|
447 |
character*80 csn
|
|
|
448 |
integer ndim
|
|
|
449 |
integer i
|
|
|
450 |
|
|
|
451 |
c Get all grid parameters
|
|
|
452 |
call cdfopn(pvsrcfile,cdfid,ierr)
|
|
|
453 |
if (ierr.ne.0) goto 998
|
|
|
454 |
call getvars(cdfid,nvars,vnam,ierr)
|
|
|
455 |
if (ierr.ne.0) goto 998
|
|
|
456 |
isok=0
|
|
|
457 |
varname='TH'
|
|
|
458 |
call check_varok(isok,varname,vnam,nvars)
|
|
|
459 |
if (isok.eq.0) goto 998
|
|
|
460 |
call getcfn(cdfid,csn,ierr)
|
|
|
461 |
if (ierr.ne.0) goto 998
|
|
|
462 |
call cdfopn(csn,cstid,ierr)
|
|
|
463 |
if (ierr.ne.0) goto 998
|
|
|
464 |
call getdef(cdfid,varname,ndim,misdat,vardim,varmin,varmax,
|
|
|
465 |
> stag,ierr)
|
|
|
466 |
if (ierr.ne.0) goto 998
|
|
|
467 |
nx=vardim(1)
|
|
|
468 |
ny=vardim(2)
|
|
|
469 |
nz=vardim(3)
|
|
|
470 |
xmin=varmin(1)
|
|
|
471 |
ymin=varmin(2)
|
|
|
472 |
zmin=varmin(3)
|
|
|
473 |
call getlevs(cstid,nz,aklev,bklev,aklay,bklay,ierr)
|
|
|
474 |
if (ierr.ne.0) goto 998
|
|
|
475 |
call getgrid(cstid,dx,dy,ierr)
|
|
|
476 |
if (ierr.ne.0) goto 998
|
|
|
477 |
xmax=varmax(1)
|
|
|
478 |
ymax=varmax(2)
|
|
|
479 |
zmax=varmax(3)
|
|
|
480 |
dz=(zmax-zmin)/real(nz-1)
|
|
|
481 |
call clscdf(cstid,ierr)
|
|
|
482 |
if (ierr.ne.0) goto 998
|
|
|
483 |
call clscdf(cdfid,ierr)
|
|
|
484 |
if (ierr.ne.0) goto 998
|
|
|
485 |
|
|
|
486 |
c Check whether the grid is equallay spaced in the vertical
|
|
|
487 |
do i=1,nz-1
|
|
|
488 |
dh=aklev(i+1)-aklev(i)
|
|
|
489 |
if (abs(dh-dz).gt.eps) then
|
|
|
490 |
print*,'Aklev: Vertical grid must be equally spaced... Stop'
|
|
|
491 |
print*,(aklev(i),i=1,nz)
|
|
|
492 |
stop
|
|
|
493 |
endif
|
|
|
494 |
dh=aklay(i+1)-aklay(i)
|
|
|
495 |
if (abs(dh-dz).gt.eps) then
|
|
|
496 |
print*,'Aklay: Vertical grid must be equally spaced... Stop'
|
|
|
497 |
print*,(aklay(i),i=1,nz)
|
|
|
498 |
stop
|
|
|
499 |
endif
|
|
|
500 |
enddo
|
|
|
501 |
|
|
|
502 |
c Set missing data value
|
|
|
503 |
mdv=misdat
|
|
|
504 |
|
|
|
505 |
return
|
|
|
506 |
|
|
|
507 |
c Exception handling
|
|
|
508 |
998 print*,'Read_Dim: Problem with input netcdf file... Stop'
|
|
|
509 |
stop
|
|
|
510 |
|
|
|
511 |
end
|
|
|
512 |
|
|
|
513 |
|