1 |
jmc |
1.3 |
C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/gad_c4_adv_y.F,v 1.2 2001/07/11 22:46:32 jmc Exp $ |
2 |
jmc |
1.2 |
C $Name: $ |
3 |
adcroft |
1.1 |
|
4 |
|
|
#include "GAD_OPTIONS.h" |
5 |
|
|
|
6 |
|
|
SUBROUTINE GAD_C4_ADV_Y( |
7 |
|
|
I bi,bj,k, |
8 |
|
|
I vTrans, |
9 |
|
|
I tracer, |
10 |
|
|
O vT, |
11 |
|
|
I myThid ) |
12 |
jmc |
1.2 |
C /==========================================================\ |
13 |
|
|
C | SUBROUTINE GAD_C4_ADV_Y | |
14 |
|
|
C | o Compute Meridional advective Flux of Tracer using | |
15 |
|
|
C | 4th Order Centered Scheme | |
16 |
jmc |
1.3 |
C | o reduced to 2nd or 3rd Order near a boundary | |
17 |
jmc |
1.2 |
C |==========================================================| |
18 |
adcroft |
1.1 |
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 |
jmc |
1.2 |
vT(i,2-Oly)=0. |
40 |
|
|
vT(i,sNy+Oly)=0. |
41 |
adcroft |
1.1 |
ENDDO |
42 |
jmc |
1.2 |
DO j=1-Oly+2,sNy+Oly-1 |
43 |
adcroft |
1.1 |
DO i=1-Olx,sNx+Olx |
44 |
jmc |
1.3 |
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 |
adcroft |
1.1 |
& vTrans(i,j)*( |
55 |
|
|
& Tracer(i,j)+Tracer(i,j-1)-oneSixth*( Rjjp+Rjjm ) |
56 |
|
|
& )*0.5 _d 0 |
57 |
jmc |
1.3 |
& +ABS( vTrans(i,j) )*0.5 _d 0*oneSixth*( Rjjp-Rjjm ) |
58 |
|
|
& *( 1. _d 0 - maskS(i,j-1,k,bi,bj)*maskS(i,j+1,k,bi,bj) ) |
59 |
adcroft |
1.1 |
ENDDO |
60 |
|
|
ENDDO |
61 |
|
|
|
62 |
|
|
RETURN |
63 |
|
|
END |