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!                     version 3; Last Modified: May 7, 2008.
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!
C
C  X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
C

      subroutine inmi_ptend(pvort,pdiv,pp,pgz,plnps,ldwrite),6
*
***s/r inmi_ptend  - From input time-tendencies of (Vort,Div,TT,lnps),
*                    computes vertically projected time-tendencies required by INMI scheme.
*                    i.e.: d(Vort,Div,P)/dt (on vertical normal modes).
*                    ref: Temperton, C., M. Roch, 1991: Implicit Normal Mode Initialization
*                    for an Operational Regional Model, MWR 119, 667-677.
*                    See p. 670. eqn. (3.1).
*
*Author  : Luc Fillion - 27 Apr. 2007.
*Revision:
*: Luc Fillion - ARMA/EC - May 2010 - Implemented in v_11_01b of 3dvar.
*
*     -------------------
**    Purpose: Used for LAM4D analysis
*
*Arguments
*
* out:
*     pvort    = Vertically projected vorticity time-tendency
*     pdiv     = Vertically projected Divergence time-tendency
*     pp       = Vertically projected P mass time-tendency
*
* in:
*     pvort    = Vorticity time-tendency on physical vertical grid.
*     pdiv     = Divergence time-tendency on physical vertical grid.
*     pgz      = GZ time-tendency on physical vertical grid.
*     plnps    = Lnps time-tendency on physical grid.
*
      implicit none
#include "taglam4d.cdk"
#include "comdim.cdk"
#include "comcst.cdk"
#include "comlun.cdk"
#include "comode.cdk"
#include "comin.cdk"
!
      logical ldwrite
      real*8 pvort(ni,nflev,nj)
      real*8 pdiv(ni,nflev,nj)
      real*8 pgz(ni,nflev,nj)
      real*8 pp(ni,nflev,nj)
      real*8 plnps(ni,nj)
!
      character*3 clvar
      character*8 clletiket
      logical llwrite
      integer ji,jj,jk,jk1,jk2
      integer ilen,ierr
      integer idum1,idum2,idum3,idum4
!
      real*8 zmin,zmax
      real*8 zvert1(nflev),zvert2(nflev)
      real*8 zp(ni,nflev,nj)
*
**
!      write(nulout,*) 'INMI_PTEND BEGINS'
!
!*1.  Compute P time-tendency
!     -----------------------
!
      do ji=1,ni
        do jj=1,nj
          do jk=1,nflev
            pp(ji,jk,jj) = pgz(ji,jk,jj)+rd*tstar*plnps(ji,jj)
          enddo
        enddo
      enddo
!
!*2.  Compute Vertically projected time-tendencies
!     --------------------------------------------
!
! Vort
      do jj=1,nj
        do ji=1,ni
          do jk=1,nflev
            zvert1(jk)=pvort(ji,jk,jj) 
          enddo
          call mxv(zvert2,vinv,zvert1,nflev,nflev)
          do jk=1,nflev
            pvort(ji,jk,jj) = zvert2(jk) 
          enddo
        enddo
      enddo
!
! Div
      do jj=1,nj
        do ji=1,ni
          do jk=1,nflev
            zvert1(jk)=pdiv(ji,jk,jj) 
          enddo
          call mxv(zvert2,vinv,zvert1,nflev,nflev)
          do jk=1,nflev
            pdiv(ji,jk,jj) = zvert2(jk) 
          enddo
        enddo
      enddo
!
! PP
      do jj=1,nj
        do ji=1,ni
          do jk=1,nflev
            zvert1(jk)=pp(ji,jk,jj) 
          enddo
          call mxv(zvert2,vinv,zvert1,nflev,nflev)
          do jk=1,nflev
            pp(ji,jk,jj) = zvert2(jk) 
          enddo
        enddo
      enddo
!
      if(ldwrite) then
! QQ
        clletiket='INMIPTEN'
        clvar = 'QQ '
        do jk=1,nflev
          do jj=1,nj
            do ji=1,ni
              zp(ji,jk,jj)=pvort(ji,jk,jj)
            enddo
          enddo
        enddo
        call write_fld(zp,clvar,clletiket,nflev)
!
! DD
        clletiket='INMIPTEN'
        clvar = 'DD '
        do jk=1,nflev
          do jj=1,nj
            do ji=1,ni
              zp(ji,jk,jj)=pdiv(ji,jk,jj)
            enddo
          enddo
        enddo
        call write_fld(zp,clvar,clletiket,nflev)
! PP
        clletiket='INMIPTEN'
        clvar = 'GZ '
        do jk=1,nflev
          do jj=1,nj
            do ji=1,ni
              zp(ji,jk,jj)=pp(ji,jk,jj)
            enddo
          enddo
        enddo
        call write_fld(zp,clvar,clletiket,nflev)
      endif
!
      return
      end