C $Header: /u/gcmpack/MITgcm/pkg/mom_fluxform/mom_calc_rtrans.F,v 1.7 2007/10/15 15:28:58 jmc Exp $
C $Name: $
#include "MOM_FLUXFORM_OPTIONS.h"
CBOP
C !ROUTINE: MOM_CALC_RTRANS
C !INTERFACE:
SUBROUTINE MOM_CALC_RTRANS(
I k, bi, bj,
O rTransU, rTransV,
I myTime, myIter, myThid)
C !DESCRIPTION: \bv
C *==========================================================*
C | SUBROUTINE MOM_CALC_RTRANS
C | o Calculate vertical transports at interface k
C | above U & V points (West & South face)
C *==========================================================*
C | r coordinate (z or p):
C | is simply half of the 2 vert. Transp at Center location
C | r* coordinate: less simple since
C | d.eta/dt / H has to be evaluated locally at U & V points
C *==========================================================*
C \ev
C !USES:
IMPLICIT NONE
C == GLobal variables ==
#include "SIZE.h"
#include "DYNVARS.h"
#include "EEPARAMS.h"
#include "PARAMS.h"
#include "GRID.h"
#include "SURFACE.h"
#include "MOM_FLUXFORM.h"
C !INPUT/OUTPUT PARAMETERS:
C == Routine arguments ==
C k :: vertical level
C bi,bj :: tile indices
C rTransU :: vertical transport (above U point)
C rTransV :: vertical transport (above V point)
C myTime :: current time
C myIter :: current iteration number
C myThid :: thread number
INTEGER k, bi, bj, myIter, myThid
_RL myTime
_RL rTransU(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
_RL rTransV(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
C !LOCAL VARIABLES:
#ifdef NONLIN_FRSURF
C == Local variables in common block ==
C dWtransC :: vertical transp. difference between r & r* coordinates
C dWtransU :: same but above u.point location (West face)
C dWtransV :: same but above v.point location (South face)
cph need this in a header for the adjoint
cph COMMON /LOCAL_MOM_CALC_RTRANS/
cph & dWtransC, dWtransU, dWtransV
cph _RL dWtransC(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
cph _RL dWtransU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
cph _RL dWtransV(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
#endif /* NONLIN_FRSURF */
C == Local variables ==
C I, J :: Loop counters
INTEGER i,j
CEOP
#ifdef NONLIN_FRSURF
IF ( k.EQ.Nr+1 .AND.
& useRealFreshWaterFlux .AND. usingPCoords ) THEN
C note: deep-model not implemented for P-coordinate + realFreshWaterFlux ;
C anelastic: always assumes that rhoFacF(1) = 1
DO j=1-OLy+1,sNy+OLy
DO i=1-OLx+1,sNx+OLx
rTransU(i,j) = mass2rUnit*
& 0.5 _d 0*( PmEpR( i ,j,bi,bj)*rA( i ,j,bi,bj)
& +PmEpR(i-1,j,bi,bj)*rA(i-1,j,bi,bj) )
rTransV(i,j) = mass2rUnit*
& 0.5 _d 0*( PmEpR(i, j ,bi,bj)*rA(i, j ,bi,bj)
& +PmEpR(i,j-1,bi,bj)*rA(i,j-1,bi,bj) )
ENDDO
ENDDO
ELSEIF ( k.GT.Nr ) THEN
#else /* NONLIN_FRSURF */
IF ( k.GT.Nr ) THEN
#endif /* NONLIN_FRSURF */
DO j=1-OLy+1,sNy+OLy
DO i=1-OLx+1,sNx+OLx
rTransU(i,j) = 0.
rTransV(i,j) = 0.
ENDDO
ENDDO
ELSE
C- Calculate vertical transports above U & V points (West & South face):
DO j=1-OLy+1,sNy+OLy
DO i=1-OLx+1,sNx+OLx
rTransU(i,j) =
& 0.5 _d 0*( wVel(i-1,j,k,bi,bj)*rA(i-1,j,bi,bj)
& +wVel( i ,j,k,bi,bj)*rA( i ,j,bi,bj)
& )*deepFac2F(k)*rhoFacF(k)
rTransV(i,j) =
& 0.5 _d 0*( wVel(i,j-1,k,bi,bj)*rA(i,j-1,bi,bj)
& +wVel(i, j ,k,bi,bj)*rA(i, j ,bi,bj)
& )*deepFac2F(k)*rhoFacF(k)
ENDDO
ENDDO
ENDIF
#ifdef NONLIN_FRSURF
C--- Modify rTransU & rTransV when using r* coordinate:
C note: not implemented neither for anelastic nor deep-model.
IF ( select_rStar.NE.0 ) THEN
# ifndef DISABLE_RSTAR_CODE
IF ( k.EQ.1) THEN
C- Initialise dWtrans :
DO j=1-OLy,sNy+OLy
DO i=1-OLx,sNx+OLx
dWtransC(i,j,bi,bj) = rStarDhCDt(i,j,bi,bj)
& *(Ro_surf(i,j,bi,bj)-R_low(i,j,bi,bj))
& *rA(i,j,bi,bj)
ENDDO
ENDDO
DO j=1-OLy+1,sNy+OLy
DO i=1-OLx+1,sNx+OLx
dWtransU(i,j,bi,bj) =
& 0.5 _d 0*(dWtransC(i-1,j,bi,bj)+dWtransC(i,j,bi,bj))
dWtransV(i,j,bi,bj) =
& 0.5 _d 0*(dWtransC(i,j-1,bi,bj)+dWtransC(i,j,bi,bj))
ENDDO
ENDDO
ELSEIF (k.LE.Nr) THEN
C- Update dWtrans from previous value (interface k-1):
DO j=1-OLy,sNy+OLy
DO i=1-OLx,sNx+OLx
dWtransC(i,j,bi,bj) = dWtransC(i,j,bi,bj)
& - rStarDhCDt(i,j,bi,bj)*drF(k-1)*h0FacC(i,j,k-1,bi,bj)
& *rA(i,j,bi,bj)
ENDDO
ENDDO
DO j=1-OLy+1,sNy+OLy
DO i=1-OLx+1,sNx+OLx
dWtransU(i,j,bi,bj) = dWtransU(i,j,bi,bj)
& - rStarDhWDt(i,j,bi,bj)*drF(k-1)*h0FacW(i,j,k-1,bi,bj)
& *rAw(i,j,bi,bj)
dWtransV(i,j,bi,bj) = dWtransV(i,j,bi,bj)
& - rStarDhSDt(i,j,bi,bj)*drF(k-1)*h0FacS(i,j,k-1,bi,bj)
& *rAs(i,j,bi,bj)
ENDDO
ENDDO
C- Modify rTransU & rTransV :
DO j=1-OLy+1,sNy+OLy
DO i=1-OLx+1,sNx+OLx
rTransU(i,j) = rTransU(i,j)-dWtransU(i,j,bi,bj)
& + (dWtransC(i-1,j,bi,bj)+dWtransC(i,j,bi,bj))*0.5 _d 0
rTransV(i,j) = rTransV(i,j)-dWtransV(i,j,bi,bj)
& + (dWtransC(i,j-1,bi,bj)+dWtransC(i,j,bi,bj))*0.5 _d 0
ENDDO
ENDDO
ENDIF
# endif /* DISABLE_RSTAR_CODE */
ENDIF
#endif /* NONLIN_FRSURF */
RETURN
END