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C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/gad_u3_adv_x.F,v 1.1 2001/07/12 00:31:59 jmc Exp $ |
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C $Name: $ |
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|
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#include "GAD_OPTIONS.h" |
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|
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SUBROUTINE GAD_U3_ADV_X( |
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I bi,bj,k, |
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I uTrans, |
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I tracer, |
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O uT, |
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I myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE GAD_U3_ADV_X | |
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C | o Compute Zonal advective Flux of Tracer using | |
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C | 3rd Order Upwind Scheme | |
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C | o reduced to 2nd or 3rd Order near a boundary | |
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C |==========================================================| |
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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 "GRID.h" |
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#include "GAD.h" |
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|
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C == Routine arguments == |
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INTEGER bi,bj,k |
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_RL uTrans(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL uT (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER myThid |
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|
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C == Local variables == |
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INTEGER i,j |
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_RL Rjm,Rj,Rjp,Rjjm,Rjjp |
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|
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DO j=1-Oly,sNy+Oly |
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uT(1-Olx,j)=0. |
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uT(2-Olx,j)=0. |
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uT(sNx+Olx,j)=0. |
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DO i=1-Olx+2,sNx+Olx-1 |
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Rjp=(tracer(i+1,j)-tracer(i,j)) |
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c & *maskW(i+1,j,k,bi,bj) |
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Rj =(tracer(i,j)-tracer(i-1,j)) |
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c & *maskW(i,j,k,bi,bj) |
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Rjm=(tracer(i-1,j)-tracer(i-2,j)) |
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c & *maskW(i-1,j,k,bi,bj) |
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C- jmc: mask not needed here above if Rjjp & Rjjm & uTrans are masked |
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Rjjp=(Rjp-Rj)*maskW(i+1,j,k,bi,bj) |
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Rjjm=(Rj-Rjm)*maskW(i-1,j,k,bi,bj) |
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uT(i,j) = |
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& uTrans(i,j)*( |
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& Tracer(i,j)+Tracer(i-1,j)-oneSixth*( Rjjp+Rjjm ) |
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& )*0.5 _d 0 |
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& +ABS( uTrans(i,j) )*0.5 _d 0*oneSixth*( Rjjp-Rjjm ) |
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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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