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C $Header: /u/gcmpack/models/MITgcmUV/pkg/mom_fluxform/mom_v_coriolis.F,v 1.3 2001/09/26 19:05:21 adcroft Exp $ |
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C $Name: $ |
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#include "CPP_OPTIONS.h" |
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CBOP |
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C !ROUTINE: MOM_V_CORIOLIS |
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C !INTERFACE: ========================================================== |
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SUBROUTINE MOM_V_CORIOLIS( |
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I bi,bj,k,uFld, |
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U vCoriolisTerm, |
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I myThid) |
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C !DESCRIPTION: |
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C Calculates the horizontal Coriolis term in the meridional equation: |
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C \begin{equation*} |
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C -\overline{f}^j \overline{u}^{ij} |
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C \end{equation*} |
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C !USES: =============================================================== |
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IMPLICIT NONE |
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#include "SIZE.h" |
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#include "DYNVARS.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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#include "SURFACE.h" |
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C !INPUT PARAMETERS: =================================================== |
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C bi,bj :: tile indices |
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C k :: vertical level |
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C uFld :: zonal flow |
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C myThid :: thread number |
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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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INTEGER myThid |
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C !OUTPUT PARAMETERS: ================================================== |
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C vCoriolisTerm :: Coriolis term |
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_RL vCoriolisTerm(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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C !LOCAL VARIABLES: ==================================================== |
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C i,j :: loop indices |
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INTEGER I,J |
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CEOP |
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IF (useEnergyConservingCoriolis) THEN |
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C Energy conserving discretization |
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DO j=1-Oly+1,sNy+Oly |
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DO i=1-Olx,sNx+Olx-1 |
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vCoriolisTerm(i,j) = |
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& 0.5*( _fCori(i, j ,bi,bj) |
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& *0.5*( uFld( i , j )+uFld(i+1, j ) ) |
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& + _fCori(i,j-1,bi,bj) |
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& *0.5*( uFld( i ,j-1)+uFld(i+1,j-1) ) ) |
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ENDDO |
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ENDDO |
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ELSE |
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C Original discretization |
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DO j=1-Oly+1,sNy+Oly |
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DO i=1-Olx,sNx+Olx-1 |
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vCoriolisTerm(i,j) = |
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& -0.5*(_fCori(i, j ,bi,bj)+_fCori(i,j-1,bi,bj)) |
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& *0.25*( uFld(i, j )+uFld(i+1, j ) |
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& +uFld(i,j-1)+uFld(i+1,j-1) |
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& ) |
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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 |
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