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	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