pkg/generic_advdiff/gad_c4_adv_x.F

C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/gad_c4_adv_x.F,v 1.1 2001/05/30 19:34:48 adcroft Exp $
C $Name:  $

#include "GAD_OPTIONS.h"

      SUBROUTINE GAD_C4_ADV_X( 
     I           bi,bj,k,
     I           uTrans,
     I           tracer,
     O           uT,
     I           myThid )
C     /==========================================================\
C     | SUBROUTINE GAD_C4_ADV_X                                  |
C     | o Compute Zonal advective Flux of Tracer using           |
C     |   4th Order Centered Scheme                              |
C     |==========================================================|
      IMPLICIT NONE

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

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

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

      DO j=1-Oly,sNy+Oly
       uT(1-Olx,j)=0.
       uT(2-Olx,j)=0.
       uT(sNx+Olx,j)=0.
       DO i=1-Olx+2,sNx+Olx-1
        Rjp=(tracer(i+1,j)-tracer(i,j))*maskW(i+1,j,k,bi,bj)
        Rj=(tracer(i,j)-tracer(i-1,j))*maskW(i,j,k,bi,bj)
        Rjm=(tracer(i-1,j)-tracer(i-2,j))*maskW(i-1,j,k,bi,bj)
        Rjjp=Rjp-Rj
        Rjjm=Rj-Rjm
        uT(i,j) = 
     &   uTrans(i,j)*(
     &     Tracer(i,j)+Tracer(i-1,j)-oneSixth*( Rjjp+Rjjm )
     &               )*0.5 _d 0
       ENDDO
      ENDDO

      RETURN
      END
1	jmc	1.2	C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/gad_c4_adv_x.F,v 1.1 2001/05/30 19:34:48 adcroft Exp $
2			C $Name: $
3	adcroft	1.1
4			#include "GAD_OPTIONS.h"
5
6			SUBROUTINE GAD_C4_ADV_X(
7			I bi,bj,k,
8			I uTrans,
9			I tracer,
10			O uT,
11			I myThid )
12	jmc	1.2	C /==========================================================\
13			C \| SUBROUTINE GAD_C4_ADV_X \|
14			C \| o Compute Zonal advective Flux of Tracer using \|
15			C \| 4th Order Centered Scheme \|
16			C \|==========================================================\|
17	adcroft	1.1	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 uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
27			_RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
28			_RL uT (1-OLx:sNx+OLx,1-OLy:sNy+OLy)
29			INTEGER myThid
30
31			C == Local variables ==
32			INTEGER i,j
33			_RL Rjm,Rj,Rjp,Rjjm,Rjjp
34
35			DO j=1-Oly,sNy+Oly
36			uT(1-Olx,j)=0.
37	jmc	1.2	uT(2-Olx,j)=0.
38			uT(sNx+Olx,j)=0.
39			DO i=1-Olx+2,sNx+Olx-1
40	adcroft	1.1	Rjp=(tracer(i+1,j)-tracer(i,j))*maskW(i+1,j,k,bi,bj)
41			Rj=(tracer(i,j)-tracer(i-1,j))*maskW(i,j,k,bi,bj)
42			Rjm=(tracer(i-1,j)-tracer(i-2,j))*maskW(i-1,j,k,bi,bj)
43			Rjjp=Rjp-Rj
44			Rjjm=Rj-Rjm
45			uT(i,j) =
46			& uTrans(i,j)*(
47			& Tracer(i,j)+Tracer(i-1,j)-oneSixth*( Rjjp+Rjjm )
48			& )*0.5 _d 0
49			ENDDO
50			ENDDO
51
52			RETURN
53			END