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!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 v4d_corrvec_ad - ADJ of v4d_corrvec  
*
#include "model_macros_f.h"
*

      subroutine v4d_corrvec_ad (zuo,zvo,npts,zui,zvi,ax,ay,cx,cy,i1,i2,j1,j2,nk, 1,3
     %                           jmin,jmax,ni,grtypi,degree)
*
      use v4dzone
*
#include "impnone.cdk"
*
      integer npts,i1,i2,j1,j2,nk,jmin,jmax,ni,degree
*
      real zuo(nk,npts),zvo(nk,npts),zui(i1:i2,j1:j2,nk),zvi(i1:i2,j1:j2,nk),
     %     ax(i1:i2),ay(j1:j2),cx(i1:i2,6),cy(j1:j2,6)
*
      character*1 grtypi
*
*author Tanguay M.
*
*revision
* v3_00 - Tanguay M.        - initial MPI version
*
*object
*  see id section
*
*Adjoint of
*arguments
* Name         I/O        Description
*----------------------------------------------------------------
* zuo zvo       O         Interpolated wind fields at positions px,py
* npts          I         Number of positions in zuo zvo 
* zui zvi       I         Wind fields on INPUT grid
* ax            I         X axe of INPUT grid
* ay            I         Y axe of INPUT grid
* cx            I         AX difference on INPUT grid
* cy            I         AY difference on INPUT grid
* i1-i2         I         Dimension x in INPUT grid
* j1-j2         I         Dimension y in INPUT grid
* nk            I         Dimension z in INPUT grid
* jmin          I         Lower  limit j
* jmax          I         Higher limit j
* ni            I         Period if grid='G', Heart if grid = 'Z'
* grtypi        I         Type of INPUT grid
* degree        I         Degree of interpolation
*----------------------------------------------------------------
*
*implicits
*
*     Adjoint of
*     Zone near south pole
*     --------------------
      if(V4dz_nzon(2).gt.0) 
     %   call v4d_corrvec_south_ad (zuo,zvo,npts,zui,zvi,V4dz_linepolus,V4dz_linepolvs,
     %                              ax,ay,cx,cy,i1,i2,j1,j2,nk,jmin,jmax,ni,V4dz_xzon2,V4dz_yzon2,
     %                              V4dz_izon2,V4dz_nzon(2),grtypi,degree)
*
*     Adjoint of
*     Zone near north pole
*     --------------------
      if(V4dz_nzon(1).gt.0) 
     %   call v4d_corrvec_north_ad (zuo,zvo,npts,zui,zvi,V4dz_linepolun,V4dz_linepolvn,
     %                              ax,ay,cx,cy,i1,i2,j1,j2,nk,jmin,jmax,ni,V4dz_xzon1,V4dz_yzon1,
     %                              V4dz_izon1,V4dz_nzon(1),grtypi,degree)
*
      return
      end