pkg/generic_advdiff/gad_u3_adv_y.F

C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/gad_u3_adv_y.F,v 1.1 2001/07/12 00:31:59 jmc Exp $
C $Name:  $

#include "GAD_OPTIONS.h"

      SUBROUTINE GAD_U3_ADV_Y( 
     I           bi,bj,k,
     I           vTrans,
     I           tracer,
     O           vT,
     I           myThid )
C     /==========================================================\
C     | SUBROUTINE GAD_U3_ADV_Y                                  |
C     | o Compute Meridional advective Flux of Tracer using      |
C     |   3rd Order Upwind Scheme                                |
C     | o reduced to 2nd or 3rd Order near a boundary            |
C     |==========================================================|
      IMPLICIT NONE

C     == GLobal variables ==
#include "SIZE.h"
#include "GRID.h"
#include "GAD.h"

C     == Routine arguments ==
      INTEGER bi,bj,k
      _RL vTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL vT    (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      INTEGER myThid

C     == Local variables ==
      INTEGER i,j
      _RL Rjm,Rj,Rjp,Rjjm,Rjjp


      DO i=1-Olx,sNx+Olx
       vT(i,1-Oly)=0.
       vT(i,2-Oly)=0.
       vT(i,sNy+Oly)=0.
      ENDDO
      DO j=1-Oly+2,sNy+Oly-1
       DO i=1-Olx,sNx+Olx
        Rjp=(tracer(i,j+1)-tracer(i,j))
c    &     *maskS(i,j+1,k,bi,bj)
        Rj =(tracer(i,j)-tracer(i,j-1))
c    &     *maskS(i,j,k,bi,bj)
        Rjm=(tracer(i,j-1)-tracer(i,j-2))
c    &     *maskS(i,j-1,k,bi,bj)
C- jmc: mask not needed here above if Rjjp & Rjjm & vTrans are masked
        Rjjp=(Rjp-Rj)*maskS(i,j+1,k,bi,bj)
        Rjjm=(Rj-Rjm)*maskS(i,j-1,k,bi,bj)
        vT(i,j) = 
     &   vTrans(i,j)*(
     &     Tracer(i,j)+Tracer(i,j-1)-oneSixth*( Rjjp+Rjjm )
     &               )*0.5 _d 0
     &  +ABS( vTrans(i,j) )*0.5 _d 0*oneSixth*( Rjjp-Rjjm )
       ENDDO
      ENDDO

      RETURN
      END
1	C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/gad_u3_adv_y.F,v 1.1 2001/07/12 00:31:59 jmc Exp $
2	C $Name: $
3
4	#include "GAD_OPTIONS.h"
5
6	SUBROUTINE GAD_U3_ADV_Y(
7	I bi,bj,k,
8	I vTrans,
9	I tracer,
10	O vT,
11	I myThid )
12	C /==========================================================\
13	C \| SUBROUTINE GAD_U3_ADV_Y \|
14	C \| o Compute Meridional advective Flux of Tracer using \|
15	C \| 3rd Order Upwind Scheme \|
16	C \| o reduced to 2nd or 3rd Order near a boundary \|
17	C \|==========================================================\|
18	IMPLICIT NONE
19
20	C == GLobal variables ==
21	#include "SIZE.h"
22	#include "GRID.h"
23	#include "GAD.h"
24
25	C == Routine arguments ==
26	INTEGER bi,bj,k
27	_RL vTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
28	_RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
29	_RL vT (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
30	INTEGER myThid
31
32	C == Local variables ==
33	INTEGER i,j
34	_RL Rjm,Rj,Rjp,Rjjm,Rjjp
35
36
37	DO i=1-Olx,sNx+Olx
38	vT(i,1-Oly)=0.
39	vT(i,2-Oly)=0.
40	vT(i,sNy+Oly)=0.
41	ENDDO
42	DO j=1-Oly+2,sNy+Oly-1
43	DO i=1-Olx,sNx+Olx
44	Rjp=(tracer(i,j+1)-tracer(i,j))
45	c & *maskS(i,j+1,k,bi,bj)
46	Rj =(tracer(i,j)-tracer(i,j-1))
47	c & *maskS(i,j,k,bi,bj)
48	Rjm=(tracer(i,j-1)-tracer(i,j-2))
49	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)*(
55	& Tracer(i,j)+Tracer(i,j-1)-oneSixth*( Rjjp+Rjjm )
56	& )*0.5 _d 0
57	& +ABS( vTrans(i,j) )0.5 _d 0oneSixth*( Rjjp-Rjjm )
58	ENDDO
59	ENDDO
60
61	RETURN
62	END