1 |
C $Header: /u/gcmpack/models/MITgcmUV/pkg/mom_fluxform/mom_u_coriolis.F,v 1.4 2001/09/28 03:25:15 adcroft Exp $ |
2 |
C $Name: $ |
3 |
|
4 |
#include "CPP_OPTIONS.h" |
5 |
|
6 |
CBOP |
7 |
C !ROUTINE: MOM_U_CORIOLIS |
8 |
|
9 |
C !INTERFACE: ========================================================== |
10 |
SUBROUTINE MOM_U_CORIOLIS( |
11 |
I bi,bj,k,vFld, |
12 |
U uCoriolisTerm, |
13 |
I myThid) |
14 |
|
15 |
C !DESCRIPTION: |
16 |
C Calculates the horizontal Coriolis term in the zonal equation: |
17 |
C \begin{equation*} |
18 |
C \overline{f}^i \overline{v}^{ij} |
19 |
C \end{equation*} |
20 |
|
21 |
C !USES: =============================================================== |
22 |
IMPLICIT NONE |
23 |
#include "SIZE.h" |
24 |
#include "DYNVARS.h" |
25 |
#include "EEPARAMS.h" |
26 |
#include "PARAMS.h" |
27 |
#include "GRID.h" |
28 |
#include "SURFACE.h" |
29 |
|
30 |
C !INPUT PARAMETERS: =================================================== |
31 |
C bi,bj :: tile indices |
32 |
C k :: vertical level |
33 |
C vFld :: meridional flow |
34 |
C myThid :: thread number |
35 |
INTEGER bi,bj,K |
36 |
_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
37 |
INTEGER myThid |
38 |
|
39 |
C !OUTPUT PARAMETERS: ================================================== |
40 |
C uCoriolisTerm :: Coriolis term |
41 |
_RL uCoriolisTerm(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
42 |
|
43 |
C !LOCAL VARIABLES: ==================================================== |
44 |
C i,j :: loop indices |
45 |
INTEGER I,J |
46 |
CEOP |
47 |
|
48 |
IF (useEnergyConservingCoriolis) THEN |
49 |
C Energy conserving discretization |
50 |
DO j=1-Oly,sNy+Oly-1 |
51 |
DO i=1-Olx+1,sNx+Olx |
52 |
uCoriolisTerm(i,j) = |
53 |
& 0.5*( _fCori( i ,j,bi,bj) |
54 |
& *0.5*( vFld( i ,j)+vFld( i ,j+1) ) |
55 |
& + _fCori(i-1,j,bi,bj) |
56 |
& *0.5*( vFld(i-1,j)+vFld(i-1,j+1) ) ) |
57 |
ENDDO |
58 |
ENDDO |
59 |
ELSE |
60 |
C Original discretization |
61 |
DO j=1-Oly,sNy+Oly-1 |
62 |
DO i=1-Olx+1,sNx+Olx |
63 |
uCoriolisTerm(i,j) = |
64 |
& 0.5*( _fCori( i ,j,bi,bj) + |
65 |
& _fCori(i-1,j,bi,bj) ) |
66 |
& *0.25*( |
67 |
& vFld( i ,j)+vFld( i ,j+1) |
68 |
& +vFld(i-1,j)+vFld(i-1,j+1) |
69 |
& ) |
70 |
ENDDO |
71 |
ENDDO |
72 |
ENDIF |
73 |
|
74 |
IF (useJamartWetPoints) THEN |
75 |
C Scale term so that only "wet" points are used |
76 |
C Due to: Jamart and Ozer, 1986, JGR 91 (C9), 10,621-10,631 |
77 |
C "Numerical Boundary Layers and Spurious Residual Flows" |
78 |
DO j=1-Oly,sNy+Oly-1 |
79 |
DO i=1-Olx+1,sNx+Olx |
80 |
uCoriolisTerm(i,j) = uCoriolisTerm(i,j) |
81 |
& *4.d0/max(one, maskS( i , j ,k,bi,bj)+maskS( i ,j+1,k,bi,bj) |
82 |
& +maskS(i-1, j ,k,bi,bj)+maskS(i-1,j+1,k,bi,bj) ) |
83 |
ENDDO |
84 |
ENDDO |
85 |
ENDIF |
86 |
|
87 |
RETURN |
88 |
END |