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jmc |
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C $Header: /u/gcmpack/models/MITgcmUV/pkg/mom_vecinv/mom_vi_coriolis.F,v 1.3 2001/09/05 17:46:03 heimbach Exp $ |
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C $Name: $ |
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#include "CPP_OPTIONS.h" |
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SUBROUTINE MOM_VI_CORIOLIS( |
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I bi,bj,K, |
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I uFld,vFld,omega3,hFacZ,r_hFacZ, |
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O uCoriolisTerm,vCoriolisTerm, |
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I myThid) |
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IMPLICIT NONE |
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C /==========================================================\ |
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C | S/R VORTICITY_X_V | |
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C |==========================================================| |
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C \==========================================================/ |
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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 uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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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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_RS hFacZ(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 uCoriolisTerm(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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C == Local variables == |
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INTEGER I,J |
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_RL vBarXY,uBarXY,vort3u,vort3v |
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_RS epsil |
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epsil = 1. _d -9 |
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IF (useJamartWetPoints) THEN |
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C- Partial-cell generalization of the Wet-point average method : |
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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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c vBarXY=0.25*(vFld( i ,j)+vFld( i ,j+1) |
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c & +vFld(i-1,j)+vFld(i-1,j+1)) |
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vBarXY=( |
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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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& / MAX( epsil, hFacS( i , j ,k,bi,bj)+hFacS(i-1, j ,k,bi,bj) |
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& +hFacS( i ,j+1,k,bi,bj)+hFacS(i-1,j+1,k,bi,bj) ) |
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uCoriolisTerm(i,j)= |
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& +0.5*( fCoriG(i,j,bi,bj)+fCoriG(i,j+1,bi,bj) |
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& )*vBarXY*recip_dxC(i,j,bi,bj)*_maskW(I,J,K,bi,bj) |
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C original version: |
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c vort3u=0.5*(omega3(i,j)+omega3(i,j+1)) |
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c vort3u=0.5*(omega3(i,j)*r_hFacZ(i,j) |
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c & +omega3(i,j+1)*r_hFacZ(i,j+1)) |
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c uCoriolisTerm(i,j)= |
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c & +0.5*( fCoriG(i,j,bi,bj)*r_hFacZ(i,j) |
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c & +fCoriG(i,j+1,bi,bj)*r_hFacZ(i,j+1) |
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c & )*vBarXY*recip_dxC(i,j,bi,bj)*_maskW(I,J,K,bi,bj) |
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cph *note* put these comments after end of continued line |
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cph to ensure TAMC compatibility |
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C high order vorticity advection term |
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c & +vort3u*vBarXY*recip_dxc(i,j,bi,bj) |
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C linear Coriolis term (enstrophy conserving) |
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c & ... |
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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 & +0.25*( fCori( i ,j,bi,bj)*(vFld( i ,j)+vFld( i ,j+1)) + |
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c & fCori(i-1,j,bi,bj)*(vFld(i-1,j)+vFld(i-1,j+1)) ) |
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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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ENDDO |
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ELSE |
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C- Simple average, no hFac : |
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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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vBarXY=0.25*( |
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& vFld( i , j )*dxG( i , j ,bi,bj) |
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& +vFld( i ,j+1)*dxG( i ,j+1,bi,bj) |
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& +vFld(i-1, j )*dxG(i-1, j ,bi,bj) |
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& +vFld(i-1,j+1)*dxG(i-1,j+1,bi,bj) ) |
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uCoriolisTerm(i,j)= |
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& +0.5*( fCoriG(i,j,bi,bj)+fCoriG(i,j+1,bi,bj) |
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& )*vBarXY*recip_dxC(i,j,bi,bj)*_maskW(I,J,K,bi,bj) |
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ENDDO |
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ENDDO |
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ENDIF |
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IF (useJamartWetPoints) THEN |
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C- Partial-cell generalization of the Wet-point average method : |
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DO J=2-Oly,sNy+Oly |
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DO I=1-Olx,sNx+Olx-1 |
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c uBarXY=0.25*( uFld(i, j )+uFld(i+1, j ) |
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c & +uFld(i,j-1)+uFld(i+1,j-1)) |
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uBarXY=( |
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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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& / MAX( epsil, hFacW( i , j ,k,bi,bj)+hFacW( i ,j-1,k,bi,bj) |
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& +hFacW(i+1, j ,k,bi,bj)+hFacW(i+1,j-1,k,bi,bj) ) |
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vCoriolisTerm(i,j)= |
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& -0.5*( fCoriG(i,j,bi,bj)+fCoriG(i+1,j,bi,bj) |
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& )*uBarXY*recip_dyC(i,j,bi,bj)*_maskS(I,J,K,bi,bj) |
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C original version: |
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c vort3v=0.5*(omega3(i,j)+omega3(i+1,j)) |
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c vort3v=0.5*(omega3(i,j)*r_hFacZ(i,j) |
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c & +omega3(i+1,j)*r_hFacZ(i+1,j)) |
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c vCoriolisTerm(i,j)= |
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c & -0.5*( fCoriG(i,j,bi,bj)*r_hFacZ(i,j) |
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c & +fCoriG(i+1,j,bi,bj)*r_hFacZ(i+1,j) |
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c & )*uBarXY*recip_dyC(i,j,bi,bj)*_maskS(I,J,K,bi,bj) |
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cph *note* put these comments after end of continued line |
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cph to ensure TAMC compatibility |
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C high order vorticity advection term |
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c & -vort3v*uBarXY*recip_dyc(i,j,bi,bj) |
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C linear Coriolis term (enstrophy conserving) |
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c & ... |
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C full nonlinear Coriolis term |
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c & -0.5*(omega3(i,j)+omega3(i+1,j))*uBarXY |
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C correct energy conserving form of Coriolis term |
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c & -0.25*( fCori(i,j ,bi,bj)*(uFld(i, j )+uFld(i+1,j)) + |
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c & fCori(i,j-1,bi,bj)*(uFld(i,j-1)+uFld(i+1,j)) ) |
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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,j-1,bi,bj))*uBarXY |
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ENDDO |
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ENDDO |
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ELSE |
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C- Simple average, no hFac : |
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DO J=2-Oly,sNy+Oly |
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DO I=1-Olx,sNx+Olx-1 |
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uBarXY=0.25*( |
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& uFld( i , j )*dyG( i , j ,bi,bj) |
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& +uFld( i ,j-1)*dyG( i ,j-1,bi,bj) |
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& +uFld(i+1, j )*dyG(i+1, j ,bi,bj) |
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& +uFld(i+1,j-1)*dyG(i+1,j-1,bi,bj) ) |
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vCoriolisTerm(i,j)= |
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& -0.5*( fCoriG(i,j,bi,bj)+fCoriG(i+1,j,bi,bj) |
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& )*uBarXY*recip_dyC(i,j,bi,bj)*_maskS(I,J,K,bi,bj) |
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ENDDO |
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ENDDO |
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ENDIF |
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RETURN |
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END |