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mom_vi_v_vertshear.F
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mom_vi_v_vertshear.F
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C $Header: /u/gcmpack/MITgcm/pkg/mom_vecinv/mom_vi_v_vertshear.F,v 1.11 2015/09/10 18:08:51 jmc Exp $
C $Name: $
#include "MOM_VECINV_OPTIONS.h"
SUBROUTINE MOM_VI_V_VERTSHEAR(
I bi,bj,K,
I vFld,wFld,
U vShearTerm,
I myThid)
IMPLICIT NONE
C *==========================================================*
C | S/R MOM_V_VERTSHEAR
C *==========================================================*
C *==========================================================*
C == Global variables ==
#include "SIZE.h"
#include "EEPARAMS.h"
#include "GRID.h"
#include "PARAMS.h"
C == Routine arguments ==
INTEGER bi,bj,K
_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
_RL wFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
_RL vShearTerm(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
INTEGER myThid
C == Local variables ==
INTEGER I,J,Kp1,Km1
_RL mask_Kp1,mask_Km1,wBarYm,wBarYp
_RL vZm,vZp
LOGICAL rAdvAreaWeight
c _RL vmask_Kp1,vmask_K,vmask_Km1
c LOGICAL freeslipK,noslipK
c PARAMETER(freeslipK=.TRUE.)
c PARAMETER(noslipK=.NOT.freeslipK)
c LOGICAL freeslip1,noslip1
c PARAMETER(freeslip1=.TRUE.)
c PARAMETER(noslip1=.NOT.freeslip1)
c1 _RL wBarYZ,vZbarZ
rAdvAreaWeight =.TRUE.
C- Area-weighted average either in KE or in vert. advection:
IF ( selectKEscheme.EQ.1 .OR. selectKEscheme.EQ.3 )
& rAdvAreaWeight =.FALSE.
Kp1=min(K+1,Nr)
mask_Kp1=1.
IF (K.EQ.Nr) mask_Kp1=0.
Km1=max(K-1,1)
mask_Km1=1.
IF (K.EQ.1) mask_Km1=0.
DO J=2-OLy,sNy+OLy
DO I=1-OLx,sNx+OLx
c vmask_K=_maskS(i,j,k,bi,bj)
C barZ( barY( W ) )
c wBarYm=0.5*(wFld(I,J,K,bi,bj)+wFld(I,J-1,K,bi,bj))
c wBarYp=0.5*(wFld(I,J,Kp1,bi,bj)+wFld(I,J-1,Kp1,bi,bj))
c & *mask_Kp1
IF ( rAdvAreaWeight ) THEN
C Transport at interface k : Area weighted average
wBarYm=0.5*(
& wFld(I,J,K,bi,bj)*rA(i,j,bi,bj)*maskC(i,j,Km1,bi,bj)
& +wFld(I,J-1,K,bi,bj)*rA(i,j-1,bi,bj)*maskC(i,j-1,Km1,bi,bj)
& )*mask_Km1*deepFac2F(K)*rhoFacF(K)
& *recip_rAs(i,j,bi,bj)
C Transport at interface k+1 (here wFld is already masked)
wBarYp=0.5*(
& wFld(I,J,Kp1,bi,bj)*rA(i,j,bi,bj)
& +wFld(I,J-1,Kp1,bi,bj)*rA(i,j-1,bi,bj)
& )*mask_Kp1*deepFac2F(Kp1)*rhoFacF(Kp1)
& *recip_rAs(i,j,bi,bj)
ELSE
C Transport at interface k : simple average
wBarYm=0.5*(
& wFld(I,J,K,bi,bj)*maskC(i,j,Km1,bi,bj)
& +wFld(I,J-1,K,bi,bj)*maskC(i,j-1,Km1,bi,bj)
& )*mask_Km1*deepFac2F(K)*rhoFacF(K)
C Transport at interface k+1 (here wFld is already masked)
wBarYp=0.5*(
& wFld(I,J,Kp1,bi,bj)
& +wFld(I,J-1,Kp1,bi,bj)
& )*mask_Kp1*deepFac2F(Kp1)*rhoFacF(Kp1)
ENDIF
C delta_Z( V ) @ interface k
c vmask_Km1=mask_Km1*maskS(i,j,Km1,bi,bj)
vZm=(vFld(I,J,K,bi,bj)-mask_Km1*vFld(I,J,Km1,bi,bj))*rkSign
c2 & *recip_dRC(K)
c IF (freeslip1) vZm=vZm*vmask_Km1
c IF (noslip1.AND.vmask_Km1.EQ.0.) vZm=vZm*2.
C delta_Z( V ) @ interface k+1
c vmask_Kp1=mask_Kp1*maskS(i,j,Kp1,bi,bj)
vZp=(mask_Kp1*vFld(I,J,Kp1,bi,bj)-vFld(I,J,K,bi,bj))*rkSign
c2 & *recip_dRC(Kp1)
c IF (freeslipK) vZp=vZp*vmask_Kp1
c IF (noslipK.AND.vmask_Kp1.EQ.0.) vZp=vZp*2.
c1 IF (upwindShear) THEN
c1 wBarYZ=0.5*( wBarXm + wBarXp )
c1 IF (wBarYZ.GT.0.) THEN
c1 vZbarZ=vZp
c1 ELSE
c1 vZbarZ=vZm
c1 ENDIF
c1 ELSE
c1 vZbarZ=0.5*(vZm+vZp)
c1 ENDIF
c1 vShearTerm(I,J)=-wBarYZ*vZbarZ*_maskS(I,J,K,bi,bj)
c2 vShearTerm(I,J)=-0.5*(wBarYp*vZp+wBarYm*vZm)
c2 & *_maskS(I,J,K,bi,bj)
IF (upwindShear) THEN
vShearTerm(I,J)=-0.5*
& ( (wBarYp*vZp+wBarYm*vZm)
& +(ABS(wBarYp)*vZp-ABS(wBarYm)*vZm)
& )*_recip_hFacS(i,j,k,bi,bj)
& * recip_drF(K)
& * recip_deepFac2C(K)*recip_rhoFacC(K)
ELSE
vShearTerm(I,J)=-0.5*(wBarYp*vZp+wBarYm*vZm)
& *_recip_hFacS(i,j,k,bi,bj)
& * recip_drF(K)
& * recip_deepFac2C(K)*recip_rhoFacC(K)
ENDIF
ENDDO
ENDDO
RETURN
END