/[MITgcm]/MITgcm/pkg/generic_advdiff/gad_c4_adv_y.F
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revision 1.2 by jmc, Wed Jul 11 22:46:32 2001 UTC revision 1.3 by jmc, Mon Aug 20 20:45:15 2001 UTC
# Line 13  C     /================================= Line 13  C     /=================================
13  C     | SUBROUTINE GAD_C4_ADV_Y                                  |  C     | SUBROUTINE GAD_C4_ADV_Y                                  |
14  C     | o Compute Meridional advective Flux of Tracer using      |  C     | o Compute Meridional advective Flux of Tracer using      |
15  C     |   4th Order Centered Scheme                              |  C     |   4th Order Centered Scheme                              |
16    C     | o reduced to 2nd or 3rd Order near a boundary            |
17  C     |==========================================================|  C     |==========================================================|
18        IMPLICIT NONE        IMPLICIT NONE
19    
# Line 40  C     == Local variables == Line 41  C     == Local variables ==
41        ENDDO        ENDDO
42        DO j=1-Oly+2,sNy+Oly-1        DO j=1-Oly+2,sNy+Oly-1
43         DO i=1-Olx,sNx+Olx         DO i=1-Olx,sNx+Olx
44          Rjp=(tracer(i,j+1)-tracer(i,j))*maskS(i,j+1,k,bi,bj)          Rjp=(tracer(i,j+1)-tracer(i,j))
45          Rj=(tracer(i,j)-tracer(i,j-1))*maskS(i,j,k,bi,bj)  c    &     *maskS(i,j+1,k,bi,bj)
46          Rjm=(tracer(i,j-1)-tracer(i,j-2))*maskS(i,j-1,k,bi,bj)          Rj =(tracer(i,j)-tracer(i,j-1))
47          Rjjp=Rjp-Rj  c    &     *maskS(i,j,k,bi,bj)
48          Rjjm=Rj-Rjm          Rjm=(tracer(i,j-1)-tracer(i,j-2))
49          vT(i,j) =  c    &     *maskS(i,j-1,k,bi,bj)
50    C- jmc: mask not needed here above if Rjjp & Rjjm & vTrans are masked
51            Rjjp=(Rjp-Rj)*maskS(i,j+1,k,bi,bj)
52            Rjjm=(Rj-Rjm)*maskS(i,j-1,k,bi,bj)
53            vT(i,j) =
54       &   vTrans(i,j)*(       &   vTrans(i,j)*(
55       &     Tracer(i,j)+Tracer(i,j-1)-oneSixth*( Rjjp+Rjjm )       &     Tracer(i,j)+Tracer(i,j-1)-oneSixth*( Rjjp+Rjjm )
56       &               )*0.5 _d 0       &               )*0.5 _d 0
57         &  +ABS( vTrans(i,j) )*0.5 _d 0*oneSixth*( Rjjp-Rjjm )
58         &    *( 1. _d 0 - maskS(i,j-1,k,bi,bj)*maskS(i,j+1,k,bi,bj) )
59         ENDDO         ENDDO
60        ENDDO        ENDDO
61    
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