C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/pkg/mom_fluxform/mom_u_adv_uu.F,v 1.3 2001/09/26 19:05:21 adcroft Exp $
C $Name: release1-branch-end $

#include "CPP_OPTIONS.h"

CBOP
C !ROUTINE: MOM_U_ADV_UU

C !INTERFACE: ==========================================================
      SUBROUTINE MOM_U_ADV_UU(
     I        bi,bj,k,
     I        uTrans, uFld,
     O        AdvectFluxUU,
     I        myThid)

C !DESCRIPTION:
C Calculates the zonal advective flux of zonal momentum:
C \begin{equation*}
C F^x = \overline{U}^i \overline{u}^{i}
C \end{equation*}

C !USES: ===============================================================
      IMPLICIT NONE
#include "SIZE.h"
#include "EEPARAMS.h"
#include "PARAMS.h"

C !INPUT PARAMETERS: ===================================================
C  bi,bj                :: tile indices
C  k                    :: vertical level
C  uTrans               :: zonal transport
C  uFld                 :: zonal flow
C  myThid               :: thread number
      INTEGER bi,bj,k
      _RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      INTEGER myThid

C !OUTPUT PARAMETERS: ==================================================
C  AdvectFluxUU         :: advective flux
      _RL AdvectFluxUU(1-OLx:sNx+OLx,1-OLy:sNy+OLy)

C !LOCAL VARIABLES: ====================================================
C  i,j                  :: loop indices
      INTEGER I,J
CEOP

      DO j=1-Oly,sNy+Oly-1
       DO i=1-Olx,sNx+Olx-1
        AdvectFluxUU(i,j) =
     &  0.25*( uTrans(i,j) + uTrans(i+1,j) )
     &      *(   uFld(i,j) +   uFld(i+1,j) )
       ENDDO
      ENDDO

      RETURN
      END