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C $Header: /u/gcmpack/MITgcm/pkg/mom_vecinv/mom_vi_v_coriolis_c4.F,v 1.7 2006/06/07 01:55:15 heimbach Exp $ |
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C $Name: $ |
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|
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#include "MOM_VECINV_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: MOM_VI_V_CORIOLIS_C4 |
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C !INTERFACE: |
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SUBROUTINE MOM_VI_V_CORIOLIS_C4( |
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I bi,bj,k, |
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I uFld,omega3,r_hFacZ, |
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O vCoriolisTerm, |
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I myThid) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R MOM_VI_V_CORIOLIS_C4 |
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C |==========================================================* |
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C | o Calculate zonal flux of vorticity at V point |
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C | using 4th order interpolation |
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C *==========================================================* |
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C \ev |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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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 "PARAMS.h" |
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#include "GRID.h" |
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#ifdef ALLOW_EXCH2 |
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#include "W2_EXCH2_TOPOLOGY.h" |
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#include "W2_EXCH2_PARAMS.h" |
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#endif /* ALLOW_EXCH2 */ |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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INTEGER bi,bj,k |
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_RL uFld(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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_RS r_hFacZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL vCoriolisTerm(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER myThid |
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CEOP |
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|
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C == Local variables == |
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INTEGER i,j |
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_RL vort3r(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL uBarXY,vort3v,Rjp,Rjm |
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_RL uBarYm,uBarYp |
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|
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LOGICAL northWestCorner, northEastCorner, |
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& southWestCorner, southEastCorner |
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INTEGER myFace |
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#ifdef ALLOW_EXCH2 |
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INTEGER myTile |
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#endif /* ALLOW_EXCH2 */ |
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_RL oneSixth, oneTwelve |
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LOGICAL upwindVort3 |
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LOGICAL fourthVort3 |
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PARAMETER(oneSixth=1.D0/6.D0 , oneTwelve=1.D0/12.D0) |
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PARAMETER(upwindVort3=.FALSE.) |
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PARAMETER(fourthVort3=.TRUE. ) |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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vort3r(i,j) = r_hFacZ(i,j)*omega3(i,j) |
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ENDDO |
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ENDDO |
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|
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C-- Special stuff for Cubed Sphere |
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IF (useCubedSphereExchange) THEN |
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|
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#ifdef ALLOW_EXCH2 |
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myTile = W2_myTileList(bi) |
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myFace = exch2_myFace(myTile) |
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southWestCorner = exch2_isWedge(myTile).EQ.1 |
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& .AND. exch2_isSedge(myTile).EQ.1 |
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southEastCorner = exch2_isEedge(myTile).EQ.1 |
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& .AND. exch2_isSedge(myTile).EQ.1 |
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northEastCorner = exch2_isEedge(myTile).EQ.1 |
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& .AND. exch2_isNedge(myTile).EQ.1 |
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northWestCorner = exch2_isWedge(myTile).EQ.1 |
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& .AND. exch2_isNedge(myTile).EQ.1 |
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#else |
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myFace = bi |
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southWestCorner = .TRUE. |
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southEastCorner = .TRUE. |
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northWestCorner = .TRUE. |
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northEastCorner = .TRUE. |
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#endif /* ALLOW_EXCH2 */ |
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IF ( southWestCorner ) THEN |
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i = 1 |
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j = 1 |
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vort3r(i-1,j) = ( vort3r(i-1,j) + vort3r(i,j+1) )*0.5 _d 0 |
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ENDIF |
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IF ( southEastCorner ) THEN |
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i = sNx+1 |
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j = 1 |
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vort3r(i+1,j) = ( vort3r(i+1,j) + vort3r(i,j+1) )*0.5 _d 0 |
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ENDIF |
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IF ( northWestCorner ) THEN |
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i = 1 |
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j = sNy+1 |
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vort3r(i-1,j) = ( vort3r(i-1,j) + vort3r(i,j-1) )*0.5 _d 0 |
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ENDIF |
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IF ( northEastCorner ) THEN |
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i = sNx+1 |
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j = sNy+1 |
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vort3r(i+1,j) = ( vort3r(i+1,j) + vort3r(i,j-1) )*0.5 _d 0 |
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ENDIF |
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|
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C-- End of special stuff for Cubed Sphere. |
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ENDIF |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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c DO j=2-Oly,sNy+Oly |
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c DO i=2-Olx,sNx+Olx-2 |
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DO j=1,sNy+1 |
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DO i=1,sNx |
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|
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IF ( SadournyCoriolis ) THEN |
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C- using SadournyCoriolis discretization: |
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|
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uBarXY=1. |
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uBarYm=0.5*( |
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& uFld( i , j )*dyG( i , j ,bi,bj)*_hFacW( i , j ,k,bi,bj) |
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& +uFld( i ,j-1)*dyG( i ,j-1,bi,bj)*_hFacW( i ,j-1,k,bi,bj) ) |
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uBarYp=0.5*( |
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& uFld(i+1, j )*dyG(i+1, j ,bi,bj)*_hFacW(i+1, j ,k,bi,bj) |
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& +uFld(i+1,j-1)*dyG(i+1,j-1,bi,bj)*_hFacW(i+1,j-1,k,bi,bj) ) |
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IF (upwindVorticity) THEN |
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IF ( (uBarYm+uBarYp) .GT.0.) THEN |
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vort3v=uBarYm*vort3r( i ,j) |
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ELSE |
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vort3v=uBarYp*vort3r(i+1,j) |
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ENDIF |
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ELSEIF (fourthVort3) THEN |
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Rjp = vort3r(i+1,j) -oneSixth*( vort3r(i+2,j)-vort3r( i ,j) ) |
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Rjm = vort3r( i ,j) +oneSixth*( vort3r(i+1,j)-vort3r(i-1,j) ) |
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vort3v=0.5*( uBarYm*Rjm + uBarYp*Rjp ) |
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ELSE |
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vort3v=0.5*( uBarYm*vort3r( i ,j) + uBarYp*vort3r(i+1,j) ) |
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ENDIF |
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|
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ELSE |
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C- not using SadournyCoriolis discretization: |
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|
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uBarXY=0.25*( |
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& (uFld( i , j )*dyG( i , j ,bi,bj)*_hFacW( i , j ,k,bi,bj) |
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& +uFld( i ,j-1)*dyG( i ,j-1,bi,bj)*_hFacW( i ,j-1,k,bi,bj)) |
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& +(uFld(i+1, j )*dyG(i+1, j ,bi,bj)*_hFacW(i+1, j ,k,bi,bj) |
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& +uFld(i+1,j-1)*dyG(i+1,j-1,bi,bj)*_hFacW(i+1,j-1,k,bi,bj)) |
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& ) |
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IF (upwindVort3) THEN |
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IF (uBarXY.GT.0.) THEN |
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vort3v=vort3r(i,j) |
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ELSE |
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vort3v=vort3r(i+1,j) |
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ENDIF |
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ELSEIF (fourthVort3) THEN |
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Rjp = vort3r(i+2,j) - vort3r(i+1,j) |
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Rjm = vort3r( i ,j) - vort3r(i-1,j) |
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vort3v=0.5*( vort3r(i,j) + vort3r(i+1,j) |
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& -oneTwelve*(Rjp-Rjm) |
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& ) |
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ELSE |
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vort3v=0.5*( vort3r(i,j) + vort3r(i+1,j) ) |
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ENDIF |
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|
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C- end if / else SadournyCoriolis |
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ENDIF |
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|
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vCoriolisTerm(i,j)= |
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& -vort3v*uBarXY*recip_dyC(i,j,bi,bj) |
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& * _maskS(i,j,k,bi,bj) |
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|
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ENDDO |
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ENDDO |
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|
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RETURN |
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END |
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