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C $Header: /u/gcmpack/MITgcm/pkg/shap_filt/shap_filt_uv_s2g.F,v 1.6 2004/05/24 20:03:49 adcroft Exp $ |
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C $Name: $ |
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|
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#include "SHAP_FILT_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: SHAP_FILT_UV_S2G |
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C !INTERFACE: |
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SUBROUTINE SHAP_FILT_UV_S2G( |
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U uFld, vFld, tmpFldU, tmpFldV, |
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I kSize, myTime, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R SHAP_FILT_UV_S2G |
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C | o Applies Shapiro filter to velocity field (u & v). |
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C | o use filtering function "S2" = [1 - (d_xx+d_yy)^n] |
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C | with grid spacing (physical space filter) ; |
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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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#include "SHAP_FILT.h" |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments |
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C uFld :: velocity field (U component) on which filter applies |
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C vFld :: velocity field (V component) on which filter applies |
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C tmpFldU :: working temporary array |
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C tmpFldV :: working temporary array |
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C kSize :: length of 3rd Dim : either =1 (2D field) or =Nr (3D field) |
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C myTime :: Current time in simulation |
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C myThid :: Thread number for this instance of SHAP_FILT_UV_S2G |
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INTEGER kSize |
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_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,kSize,nSx,nSy) |
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_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,kSize,nSx,nSy) |
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_RL tmpFldU(1-OLx:sNx+OLx,1-OLy:sNy+OLy,kSize,nSx,nSy) |
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_RL tmpFldV(1-OLx:sNx+OLx,1-OLy:sNy+OLy,kSize,nSx,nSy) |
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_RL myTime |
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INTEGER myThid |
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|
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#ifdef ALLOW_SHAP_FILT |
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|
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C !LOCAL VARIABLES: |
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C == Local variables == |
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INTEGER bi,bj,k,i,j,N |
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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 hDiv(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL vort3(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL tmpGrdU(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL tmpGrdV(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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CEOP |
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|
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IF (nShapUV.gt.0 .AND. Shap_uvtau.GT.0.) THEN |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO K=1,kSize |
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DO J=1-OLy,sNy+OLy |
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DO I=1-OLx,sNx+OLx |
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tmpFldU(i,j,k,bi,bj)=uFld(i,j,k,bi,bj) |
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& *_maskW(i,j,k,bi,bj) |
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tmpFldV(i,j,k,bi,bj)=vFld(i,j,k,bi,bj) |
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& *_maskS(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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|
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C [d_xx+d_yy]^n tmpFld |
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|
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DO N=1,nShapUV |
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|
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IF (kSize.EQ.Nr) THEN |
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CALL EXCH_UV_XYZ_RL(tmpFldU,tmpFldV,.TRUE.,myThid) |
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ELSE |
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CALL EXCH_UV_XY_RL(tmpFldU,tmpFldV,.TRUE.,myThid) |
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ENDIF |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO K=1,kSize |
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|
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C [d_xx+d_yy] tmpFld |
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CALL MOM_CALC_HFACZ(bi,bj,k,hFacZ,r_hFacZ,myThid) |
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CALL MOM_CALC_HDIV(bi,bj,k,2, |
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I tmpFldU(1-OLx,1-OLy,k,bi,bj), |
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I tmpFldV(1-OLx,1-OLy,k,bi,bj), |
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& hDiv,myThid) |
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CALL MOM_CALC_RELVORT3(bi,bj,k, |
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I tmpFldU(1-OLx,1-OLy,k,bi,bj), |
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I tmpFldV(1-OLx,1-OLy,k,bi,bj), |
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& hFacZ,vort3,myThid) |
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CALL MOM_VI_DEL2UV( |
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I bi,bj,k,hDiv,vort3,hFacZ, |
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O tmpGrdU,tmpGrdV, |
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& myThid) |
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|
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IF (Shap_uvLength.EQ.0.) THEN |
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DO J=1,sNy+1 |
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DO I=1,sNx+1 |
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tmpFldU(i,j,k,bi,bj) = -0.125 |
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& *rAw(i,j,bi,bj)*tmpGrdU(i,j)*_maskW(i,j,k,bi,bj) |
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tmpFldV(i,j,k,bi,bj) = -0.125 |
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& *rAs(i,j,bi,bj)*tmpGrdV(i,j)*_maskS(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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ELSE |
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DO J=1,sNy+1 |
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DO I=1,sNx+1 |
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tmpFldU(i,j,k,bi,bj) = -0.125 |
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& *Shap_uvLength*Shap_uvLength |
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& *tmpGrdU(i,j)*_maskW(i,j,k,bi,bj) |
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tmpFldV(i,j,k,bi,bj) = -0.125 |
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& *Shap_uvLength*Shap_uvLength |
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& *tmpGrdV(i,j)*_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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|
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|
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ENDDO |
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ENDDO |
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ENDDO |
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|
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ENDDO |
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|
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C F <- [1 - (d_xx+d_yy)^n *deltaT/tau].F |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO K=1,kSize |
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DO j=1,sNy |
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DO i=1,sNx+1 |
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uFld(i,j,k,bi,bj)=uFld(i,j,k,bi,bj) |
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& -tmpFldU(i,j,k,bi,bj)*deltaTmom/Shap_uvtau |
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tmpFldU(i,j,k,bi,bj)= -tmpFldU(i,j,k,bi,bj)/Shap_uvtau |
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ENDDO |
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ENDDO |
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DO j=1,sNy+1 |
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DO i=1,sNx |
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vFld(i,j,k,bi,bj)=vFld(i,j,k,bi,bj) |
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& -tmpFldV(i,j,k,bi,bj)*deltaTmom/Shap_uvtau |
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tmpFldV(i,j,k,bi,bj)= -tmpFldV(i,j,k,bi,bj)/Shap_uvtau |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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IF (kSize.EQ.Nr) THEN |
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CALL EXCH_UV_XYZ_RL(uFld,vFld,.TRUE.,myThid) |
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ELSEIF (kSize.EQ.1) THEN |
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CALL EXCH_UV_XY_RL(uFld,vFld,.TRUE.,myThid) |
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ELSE |
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STOP 'S/R SHAP_FILT_UV_S2G: kSize is wrong' |
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ENDIF |
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|
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ENDIF |
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#endif /* ALLOW_SHAP_FILT */ |
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|
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RETURN |
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END |
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