pkg/generic_advdiff/gad_dst3_adv_y.F

C $Header: $
C $Name: $

#include "GAD_OPTIONS.h"

      SUBROUTINE GAD_DST3_ADV_Y( 
     I           bi,bj,k,deltaT,
     I           vTrans, vVel,
     I           tracer,
     O           vT,
     I           myThid )
C     /==========================================================\
C     | SUBROUTINE GAD_DST3_ADV_Y                                |
C     | o Compute Meridional advective Flux of Tracer using      |
C     |   3rd Order DST Sceheme                                  |
C     |==========================================================|
      IMPLICIT NONE

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

C     == Routine arguments ==
      INTEGER bi,bj,k
      _RL deltaT
      _RL vTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
      _RL vVel(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
      _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,cfl,d0,d1

      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))*maskS(i,j+1,k,bi,bj)
        Rj =(tracer(i,j)-tracer(i,j-1))*maskS(i,j,k,bi,bj)
        Rjm=(tracer(i,j-1)-tracer(i,j-2))*maskS(i,j-1,k,bi,bj)

        cfl=vVel(i,j,k,bi,bj)*deltaT*recip_dyc(i,j,bi,bj)
        d0=(2.-abs(cfl))*(1.-abs(cfl))*oneSixth
        d1=(1.-cfl)*(1.+cfl)*oneSixth
        vT(i,j)=
     &   0.5*(vTrans(i,j)+abs(vTrans(i,j)))
     &      *( Tracer(i,j-1) + d0*Rj + d1*Rjm )
     &  +0.5*(vTrans(i,j)-abs(vTrans(i,j)))
     &      *( Tracer(i, j ) - d0*Rj + d1*Rjp )

       ENDDO
      ENDDO

      RETURN
      END
1	adcroft	1.1	C $Header: $
2			C $Name: $
3
4			#include "GAD_OPTIONS.h"
5
6			SUBROUTINE GAD_DST3_ADV_Y(
7			I bi,bj,k,deltaT,
8			I vTrans, vVel,
9			I tracer,
10			O vT,
11			I myThid )
12			C /==========================================================\
13			C \| SUBROUTINE GAD_DST3_ADV_Y \|
14			C \| o Compute Meridional advective Flux of Tracer using \|
15			C \| 3rd Order DST Sceheme \|
16			C \|==========================================================\|
17			IMPLICIT NONE
18
19			C == GLobal variables ==
20			#include "SIZE.h"
21			#include "GRID.h"
22			#include "GAD.h"
23
24			C == Routine arguments ==
25			INTEGER bi,bj,k
26			_RL deltaT
27			_RL vTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
28			_RL vVel(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy)
29			_RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
30			_RL vT (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
31			INTEGER myThid
32
33			C == Local variables ==
34			INTEGER i,j
35			_RL Rjm,Rj,Rjp,cfl,d0,d1
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))*maskS(i,j+1,k,bi,bj)
45			Rj =(tracer(i,j)-tracer(i,j-1))*maskS(i,j,k,bi,bj)
46			Rjm=(tracer(i,j-1)-tracer(i,j-2))*maskS(i,j-1,k,bi,bj)
47
48			cfl=vVel(i,j,k,bi,bj)deltaTrecip_dyc(i,j,bi,bj)
49			d0=(2.-abs(cfl))(1.-abs(cfl))oneSixth
50			d1=(1.-cfl)(1.+cfl)oneSixth
51			vT(i,j)=
52			& 0.5*(vTrans(i,j)+abs(vTrans(i,j)))
53			& ( Tracer(i,j-1) + d0Rj + d1*Rjm )
54			& +0.5*(vTrans(i,j)-abs(vTrans(i,j)))
55			& ( Tracer(i, j ) - d0Rj + d1*Rjp )
56
57			ENDDO
58			ENDDO
59
60			RETURN
61			END