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	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
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	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	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	uT(2-Olx,j)=0.
38	uT(sNx+Olx,j)=0.
39	DO i=1-Olx+2,sNx+Olx-1
40	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