C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/ptracers/ptracers_zonal_filt_apply.F,v 1.2 2012/03/08 17:13:31 jmc Exp $
C $Name:  $

#include "PTRACERS_OPTIONS.h"

CBOP 0
C     !ROUTINE: PTRACERS_ZONAL_FILT_APPLY

C     !INTERFACE:
      SUBROUTINE PTRACERS_ZONAL_FILT_APPLY(
     I                                      myThid )

C     !DESCRIPTION:
C     *==========================================================*
C     | S/R PTRACERS_ZONAL_FILT_APPLY
C     | o Apply FFT filter to all passive tracers
C     *==========================================================*

C     !USES:
      IMPLICIT NONE
C     == Global data ==
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
#include "PTRACERS_SIZE.h"
#include "PTRACERS_PARAMS.h"
#include "PTRACERS_START.h"
#include "PTRACERS_FIELDS.h"

C     !INPUT/OUTPUT PARAMETERS:
C     myThid  :: my Thread Id number
      INTEGER myThid
CEOP

#ifdef ALLOW_ZONAL_FILT

C     !LOCAL VARIABLES:
      INTEGER iTr
      INTEGER bi,bj

      DO iTr = 1,PTRACERS_numInUse
       IF ( PTRACERS_StepFwd(iTr) ) THEN

        DO bj=myByLo(myThid),myByHi(myThid)
         DO bi=myBxLo(myThid),myBxHi(myThid)
          CALL ZONAL_FILTER(
     U                       pTracer(1-OLx,1-OLy,1,bi,bj,iTr),
     I                       hFacC(1-OLx,1-OLy,1,bi,bj),
     I                       1, sNy, Nr, bi, bj, 1, myThid )
         ENDDO
        ENDDO

       ENDIF
      ENDDO

#endif /* ALLOW_ZONAL_FILT */

      RETURN
      END