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cnh |
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C $Header: /u/u0/gcmpack/MITgcm/pkg/mom_fluxform/mom_u_yviscflux.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_U_YVISCFLUX |
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C !INTERFACE: ========================================================== |
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SUBROUTINE MOM_U_YVISCFLUX( |
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I bi,bj,k, |
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I uFld, del2u, hFacZ, |
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O yViscFluxU, |
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I myThid) |
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C !DESCRIPTION: |
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C Calculates the area integrated meridional viscous fluxes of U: |
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C \begin{equation*} |
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C F^y = - \frac{ \Delta y_v \Delta r_f h_z }{\Delta y_u} |
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C ( A_h \delta_j u - A_4 \delta_j \nabla^2 u ) |
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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 "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.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 del2u :: Laplacian of 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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_RL del2u(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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INTEGER myThid |
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C !OUTPUT PARAMETERS: ================================================== |
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C yViscFluxU :: viscous fluxes |
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_RL yViscFluxU(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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_RS gridScalingA4 |
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CEOP |
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C - Laplacian and bi-harmonic terms |
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DO j=1-Oly+1,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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gridScalingA4 = (_dyU(i,j,bi,bj)**4)/(5000.**4) |
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yViscFluxU(i,j) = |
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& _dxV(i,j,bi,bj)*drF(k)*hFacZ(i,j) |
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& *( |
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& -viscAh*(uFld(i,j)-uFld(i,j-1)) |
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#ifdef ISOTROPIC_COS_SCALING |
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& *cosFacV(J,bi,bj) |
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#endif |
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& +viscA4*(del2u(i,j) -del2u(i,j-1) ) |
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& *gridScalingA4 |
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#ifdef ISOTROPIC_COS_SCALING |
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#ifdef COSINEMETH_III |
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& *sqcosFacV(J,bi,bj) |
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#else |
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& *cosFacV(J,bi,bj) |
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#endif |
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#endif |
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& )*_recip_dyU(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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RETURN |
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END |
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