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!Environment Canada - Atmospheric Science and Technology License/Disclaimer, 
!                     version 3; Last Modified: May 7, 2008.
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***s/r adw_exch_3_tl - TLM of adw_exch_3 
*
#include "model_macros_f.h"
*

      subroutine adw_exch_3_tl ( F_1_out,   F_2_out, 5
     %                           F_1_in,    F_2_in,   F_c_in,  
     %                           F_1_m_out, F_2_m_out,
     %                           F_1_m_in,  F_2_m_in, F_c_m_in,  
     %                           F_n_treat )
*
#include "impnone.cdk"
*
      integer F_n_treat, F_c_in (*)
*
      real F_1_out (*), F_2_out (*),
     %     F_1_in  (*), F_2_in  (*)
*
      integer F_c_m_in (*)
*
      real F_1_m_out (*), F_2_m_out (*),
     %     F_1_m_in  (*), F_2_m_in  (*)
*
*author
*     M.Tanguay
*
*revision
* v3_31 - Tanguay M.        - initial MPI version
* v3_31 - Tanguay M.        - Do adjoint of outsiders in advection
*
*language
*     fortran 77
*
*object
*     see id section
*
*arguments
*______________________________________________________________________
*              |                                                 |     |
* NAME         | DESCRIPTION                                     | I/O |
*--------------|-------------------------------------------------|-----|
*              |                                                 |     |
* F_1_out      | \ interpolated fields for which some values     |  io |
* F_2_out      | / obtained from neighbors have to be fetched    |  io |
*              |   back in the appropriate positions             |     |
*              |                                                 |     |
* F_1_in       | \ interpolated values obtained from neighbors   |  i  |
* F_2_in       | /                                               |  i  |
*              |                                                 |     |
* F_c_in       | 3D coordinates of points for which upstream     |  i  |
*              | positions were outside advection source grid and|     |
*              | interpolated values were obtained from neighbors|  i  |
*              |                                                 |     |
* F_n_treat    | number of vectors to treat                      |  i  |
*______________|_________________________________________________|_____|
*
*implicits
#include "adw.cdk"
***********************************************************************
      integer n
*
***********************************************************************
*
      if ( F_n_treat .eq. 1 ) then
*
*        TRAJECTORY
*        ----------
         do n = 1, Adw_for_a
         F_1_m_out(F_c_m_in(n)) = F_1_m_in(n)
         enddo
*
*        TLM 
*        ---
         do n = 1, Adw_for_a
         F_1_out(F_c_m_in(n)) = F_1_in(n)
         enddo
*
      elseif ( F_n_treat .eq. 2 ) then
*
*        TRAJECTORY
*        ----------
         do n = 1, Adw_for_a
         F_1_m_out(F_c_m_in(n)) = F_1_m_in(n)
         F_2_m_out(F_c_m_in(n)) = F_2_m_in(n)
         enddo
*
*        TLM
*        ---
         do n = 1, Adw_for_a
         F_1_out(F_c_m_in(n)) = F_1_in(n)
         F_2_out(F_c_m_in(n)) = F_2_in(n)
         enddo
*
      endif
*
      return
      end