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***s/r v4d_zeronest -- Zero nesting data
*
#include "model_macros_f.h"


      subroutine v4d_zeronest 2
*
      implicit none
*
*author
*     Monique Tanguay
*
*revision
* v3_03 - Tanguay M.       - initial MPI version
* v3_30 - Tanguay M.       - Validation for LAM version 
*
*object
*     see id section
*
*arguments
*
*implicits
#include "glb_ld.cdk"
#include "tr3d.cdk"
#include "nest.cdk"
#include "schm.cdk"
*
*modules
      integer  vmmlod,vmmget,vmmuld
      external vmmlod,vmmget,vmmuld
*
      real trf
      pointer (patrf, trf(LDIST_SHAPE,*))
      integer i,j,k,err,pnlkey1(26),nvar,key2(Tr3d_ntr),key2_,n
      real*8, parameter :: ZERO_8 = 0.0
*     ---------------------------------------------------------------
*
      pnlkey1(1) = VMM_KEY(nest_u)
      pnlkey1(2) = VMM_KEY(nest_v)
      pnlkey1(3) = VMM_KEY(nest_t)
      pnlkey1(4) = VMM_KEY(nest_psd)
      pnlkey1(5) = VMM_KEY(nest_pip)
      pnlkey1(6) = VMM_KEY(nest_fip)
      pnlkey1(7) = VMM_KEY(nest_td)
      pnlkey1(8) = VMM_KEY(nest_fi)
      pnlkey1(9) = VMM_KEY(nest_q)
      pnlkey1(10)= VMM_KEY(nest_s)
      pnlkey1(11)= VMM_KEY(nest_tp)
      nvar = 11 
*
      if (.not. Schm_hydro_L) then
         pnlkey1(12) = VMM_KEY(nest_w)
         pnlkey1(13) = VMM_KEY(nest_mu)
         nvar = 13 
      endif
*
      err = vmmlod(pnlkey1,nvar)
      err = VMM_GET_VAR(nest_u)
      err = VMM_GET_VAR(nest_v)
      err = VMM_GET_VAR(nest_t)
      err = VMM_GET_VAR(nest_psd)
      err = VMM_GET_VAR(nest_pip)
      err = VMM_GET_VAR(nest_fip)
      err = VMM_GET_VAR(nest_td)
      err = VMM_GET_VAR(nest_fi)
      err = VMM_GET_VAR(nest_q)
      err = VMM_GET_VAR(nest_s)
      err = VMM_GET_VAR(nest_tp)
      if (.not. Schm_hydro_L) then
         err = VMM_GET_VAR(nest_mu)
         err = VMM_GET_VAR(nest_w)
      endif
*
      do k= 1, G_nk
      do j= l_miny, l_maxy 
      do i= l_minx, l_maxx
         nest_u  (i,j,k) = ZERO_8 
         nest_v  (i,j,k) = ZERO_8 
         nest_t  (i,j,k) = ZERO_8 
         nest_psd(i,j,k) = ZERO_8 
         nest_pip(i,j,k) = ZERO_8 
         nest_fip(i,j,k) = ZERO_8 
         nest_td (i,j,k) = ZERO_8 
         nest_fi (i,j,k) = ZERO_8 
         nest_q  (i,j,k) = ZERO_8 
         nest_tp (i,j,k) = ZERO_8 
      end do
      end do
      end do
      do j= l_miny, l_maxy 
      do i= l_minx, l_maxx
         nest_s(i,j) = ZERO_8 
      end do
      end do
*
      if (.not. Schm_hydro_L) then
          do k= 1, G_nk
          do j= l_miny, l_maxy 
          do i= l_minx, l_maxx
             nest_w  (i,j,k) = ZERO_8 
             nest_mu (i,j,k) = ZERO_8 
          end do
          end do
          end do
      endif
*
      err = vmmuld(pnlkey1,nvar)
*
      key2_ = VMM_KEY (nest_tr)
      do n=1,Tr3d_ntr
         key2(n) = key2_ + n
      end do
      if (Tr3d_ntr.gt.0) then
         err = vmmlod(key2,Tr3d_ntr)
         do n=1,Tr3d_ntr
            err = vmmget(key2(n),patrf,trf)
            do k= 1, G_nk
            do j= l_miny, l_maxy 
            do i= l_minx, l_maxx
               trf (i,j,k) = ZERO_8 
            end do
            end do
            end do
         end do
         err = vmmuld(key2,Tr3d_ntr)
      endif
*
*     ---------------------------------------------------------------
      return
      end