!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer, 
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms 
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***s/r t12t2 -  Rename time level t1 -> t2
*
#include "model_macros_f.h"
*

      subroutine t12t2 1,16
#include "impnone.cdk"
*
*author 
*     Michel Roch - rpn - nov 1993
*
*revision
* v2_00 - Desgagne M.       - initial MPI version
* v2_30 - Edouard  S.       - remove pi' at the top
* v2_31 - Desgagne M.       - remove treatment of HU and QC and 
*                             re-introduce tracers
*
*object
*     Associate the variables at time t2 to the space on disk and memory
*     associated with the variables at time t1
*	
*arguments
*	none
*
*implicits
#include "glb_ld.cdk"
#include "schm.cdk"
#include "tr3d.cdk"
#include "vt1.cdk"
#include "vt2.cdk"
*
      integer i
**
*     ---------------------------------------------------------------
*
      call shuffle(vmmk_ut2   ,vmmk_ut1   ,vmmk_ut2_s)
      call shuffle(vmmk_vt2   ,vmmk_vt1   ,vmmk_vt2_s)
      call shuffle(vmmk_wt2   ,vmmk_wt1   ,vmmk_wt2_s)
      call shuffle(vmmk_tdt2  ,vmmk_tdt1  ,vmmk_tdt2_s)
      call shuffle(vmmk_tt2   ,vmmk_tt1   ,vmmk_tt2_s)
      call shuffle(vmmk_fit2  ,vmmk_fit1  ,vmmk_fit2_s)
      call shuffle(vmmk_qt2   ,vmmk_qt1   ,vmmk_qt2_s)
      call shuffle(vmmk_tpt2  ,vmmk_tpt1  ,vmmk_tpt2_s)
      call shuffle(vmmk_fipt2 ,vmmk_fipt1 ,vmmk_fipt2_s)
      call shuffle(vmmk_qpt2  ,vmmk_qpt1  ,vmmk_qpt2_s)
      call shuffle(vmmk_pipt2 ,vmmk_pipt1 ,vmmk_pipt2_s)
      call shuffle(vmmk_tplt2 ,vmmk_tplt1 ,vmmk_tplt2_s)
      call shuffle(vmmk_psdt2 ,vmmk_psdt1 ,vmmk_psdt2_s)
      call shuffle(vmmk_st2   ,vmmk_st1   ,vmmk_st2_s)
*
      if (.not. Schm_hydro_L) then
         call shuffle(vmmk_mut2 ,vmmk_mut1 ,vmmk_mut2_s)
      endif
      if ( Tr3d_ntr .gt. 0 ) then
         call shuffle(vmmk_trt2  ,vmmk_trt1  ,vmmk_trt2_s)
      endif
*
*     ---------------------------------------------------------------
*
      return
      end