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jmc |
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C $Header: /u/gcmpack/MITgcm/pkg/mom_vecinv/mom_vi_u_coriolis.F,v 1.3 2001/09/05 17:46:03 heimbach Exp $ |
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C $Name: $ |
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adcroft |
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#include "CPP_OPTIONS.h" |
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SUBROUTINE MOM_VI_U_CORIOLIS( |
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jmc |
1.4 |
I bi,bj,k, |
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I vFld,omega3,hFacZ,r_hFacZ, |
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adcroft |
1.2 |
O uCoriolisTerm, |
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I myThid) |
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IMPLICIT NONE |
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jmc |
1.4 |
C *==========================================================* |
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C | S/R MOM_VI_U_CORIOLIS |
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C | o Calculate meridional flux of vorticity at U point |
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C *==========================================================* |
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adcroft |
1.2 |
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C == Global variables == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "GRID.h" |
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#include "PARAMS.h" |
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C == Routine arguments == |
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INTEGER bi,bj,K |
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_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL omega3(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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jmc |
1.4 |
_RS hFacZ (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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adcroft |
1.2 |
_RS r_hFacZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL uCoriolisTerm(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER myThid |
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C == Local variables == |
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jmc |
1.4 |
LOGICAL upwindVort3, use_original_hFac |
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adcroft |
1.2 |
INTEGER I,J |
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_RL vBarXY,vort3u |
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jmc |
1.4 |
_RS epsil |
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PARAMETER ( upwindVort3 =.FALSE. ) |
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PARAMETER ( use_original_hFac=.FALSE. ) |
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epsil = 1. _d -9 |
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DO J=1-Oly,sNy+Oly-1 |
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DO I=2-Olx,sNx+Olx |
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IF ( use_original_hFac ) THEN |
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adcroft |
1.2 |
vBarXY=0.25*( |
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& vFld( i , j )*dxG( i , j ,bi,bj)*hFacS( i , j ,k,bi,bj) |
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& +vFld( i ,j+1)*dxG( i ,j+1,bi,bj)*hFacS( i ,j+1,k,bi,bj) |
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& +vFld(i-1, j )*dxG(i-1, j ,bi,bj)*hFacS(i-1, j ,k,bi,bj) |
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& +vFld(i-1,j+1)*dxG(i-1,j+1,bi,bj)*hFacS(i-1,j+1,k,bi,bj)) |
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IF (upwindVort3) THEN |
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IF (vBarXY.GT.0.) THEN |
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vort3u=omega3(I,J)*r_hFacZ(i,j) |
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ELSE |
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vort3u=omega3(I,J+1)*r_hFacZ(i,j+1) |
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ENDIF |
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ELSE |
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jmc |
1.4 |
vort3u=0.5*(omega3(i,j)*r_hFacZ(i,j) |
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& +omega3(i,j+1)*r_hFacZ(i,j+1)) |
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adcroft |
1.2 |
ENDIF |
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jmc |
1.4 |
ELSE |
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c-- test a different formulation (relatively to hFac) |
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vBarXY=0.5*( |
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& vFld( i , j )*dxG( i , j ,bi,bj)*hFacZ(i,j) |
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& +vFld(i-1, j )*dxG(i-1, j ,bi,bj)*hFacZ(i,j) |
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& +vFld( i ,j+1)*dxG( i ,j+1,bi,bj)*hFacZ(i,j+1) |
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& +vFld(i-1,j+1)*dxG(i-1,j+1,bi,bj)*hFacZ(i,j+1) |
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& )/MAX( epsil, hFacZ(i,j)+hFacZ(i,j+1) ) |
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IF (upwindVort3) THEN |
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IF (vBarXY.GT.0.) THEN |
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vort3u=omega3(i,j) |
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ELSE |
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vort3u=omega3(i,j+1) |
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ENDIF |
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ELSE |
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vort3u=0.5*(omega3(i,j)+omega3(i,j+1)) |
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ENDIF |
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ENDIF |
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uCoriolisTerm(i,j)= |
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& +vort3u*vBarXY*recip_dxC(i,j,bi,bj)*_maskW(i,j,k,bi,bj) |
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heimbach |
1.3 |
cph *note* put these comments after end of continued line |
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cph to ensure TAMC compatibility |
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adcroft |
1.2 |
C high order vorticity advection term |
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heimbach |
1.3 |
c & ... |
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adcroft |
1.2 |
C linear Coriolis term |
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c & +0.5*(fCoriG(I,J,bi,bj)+fCoriG(I,J+1,bi,bj))*vBarXY |
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C full nonlinear Coriolis term |
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c & +0.5*(omega3(I,J)+omega3(I,J+1))*vBarXY |
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C correct energy conserving form of Coriolis term |
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c & +0.5*( fCori(I ,J,bi,bj)*vBarY(I ,J,K,bi,bj) + |
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c & fCori(I-1,J,bi,bj)*vBarY(I-1,J,K,bi,bj) ) |
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C original form of Coriolis term (copied from calc_mom_rhs) |
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c & +0.5*(fCori(i,j,bi,bj)+fCori(i-1,j,bi,bj))*vBarXY |
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ENDDO |
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jmc |
1.4 |
ENDDO |
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adcroft |
1.2 |
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RETURN |
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END |
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