C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/salt_plume/salt_plume_forcing_surf.F,v 1.3 2009/06/15 23:42:46 dimitri Exp $
C $Name: checkpoint61q $

#include "SALT_PLUME_OPTIONS.h"

CBOP
C     !ROUTINE: SALT_PLUME_FORCING_SURF
C     !INTERFACE:
      SUBROUTINE SALT_PLUME_FORCING_SURF(
     I                            bi, bj, iMin, iMax, jMin, jMax,
     I                            myTime,myIter,myThid )

C     !DESCRIPTION: \bv
C     *==========================================================*
C     | S/R SALT_PLUME_FORCING_SURF
C     | o saltPlume is the amount of salt rejected by ice while freezing;
C     |   it is here subtracted from surfaceForcingS and will be redistributed
C     |   to multiple vertical levels later on as per Duffy et al. (GRL 1999)
C     *==========================================================*
C     \ev

C     !USES:
      IMPLICIT NONE
C     == Global variables ==
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
#include "FFIELDS.h"
#include "DYNVARS.h"
#include "SALT_PLUME.h"

C     !INPUT PARAMETERS:
C     bi,bj                :: tile indices
C     myTime               :: model time
C     myIter               :: time-step number
C     myThid               :: thread number
      INTEGER bi, bj, iMin, iMax, jMin, jMax
      _RL myTime
      INTEGER myIter
      INTEGER myThid
CEOP

#ifdef ALLOW_SALT_PLUME

C     !LOCAL VARIABLES:
C     i,j                  :: loop indices
C     ks                   :: surface level index
      INTEGER i, j, ks

      IF ( usingPCoords ) THEN
         ks = Nr
      ELSE
         ks = 1
      ENDIF

      DO j = jMin, jMax
       DO i = iMin, iMax
        surfaceForcingS(i,j,bi,bj) = surfaceForcingS(i,j,bi,bj)
     &       - saltPlumeFlux(i,j,bi,bj) * mass2rUnit
       ENDDO
      ENDDO

      IF ( .NOT. SaltPlumeSouthernOcean ) THEN
       DO j = jMin, jMax
        DO i = iMin, iMax
         IF ( YC(I,J,bi,bj) .LT. 0.0 _d 0 )
     &        saltPlumeFlux(i,j,bi,bj) = 0.0 _d 0
        ENDDO
       ENDDO
      ENDIF

#endif /* ALLOW_SALT_PLUME */

      RETURN
      END