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C $Header: /u/gcmpack/MITgcm/pkg/shap_filt/shap_filt_uv_s2.F,v 1.4 2002/01/19 01:10:57 heimbach 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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SUBROUTINE SHAP_FILT_UV_S2( |
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U uFld, vFld, |
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I myTime, myThid ) |
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C /==========================================================\ |
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C | S/R SHAP_FILT_UV_S2 | |
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C | Applies Shapiro filter to U,V field over one XY slice | |
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C | of one tile at a time. | |
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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 "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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#include "SHAP_FILT_UV.h" |
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|
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C == Routine arguments |
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_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,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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C------ |
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C Combine computational Filter of Div & Vorticity |
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C and Physical Filter of U,V field |
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C nShapUVPhys = 0 ==> use only computational Filter |
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C nShapUVPhys = 1 ==> compute Div & Vort. with Grid factors, |
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C Filter Div & Vort. Numerically (power nShapUV-1) |
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C and return filtered U.V in physical space |
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C nShapUVPhys = nShapUV ==> Filter in Physical space only (power nShapUV) |
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C------ |
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|
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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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_RS maskZ |
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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,Nr |
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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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c---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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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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CALL EXCH_UV_XYZ_RL(tmpFldU,tmpFldV,.TRUE.,myThid) |
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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,Nr |
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|
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C [d_xx+d_yy] tmpFld |
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IF (N.LE.nShapUVPhys) THEN |
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CALL MOM_CALC_HFACZ(bi,bj,k,hFacZ,r_hFacZ,myThid) |
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CALL MOM_VI_CALC_HDIV(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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& hDiv,myThid) |
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CALL MOM_VI_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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ELSE |
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C- replace Physical calc Div & Vort by computational one : |
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DO J=0,sNy+1 |
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DO I=0,sNx+1 |
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hDiv(i,j)=tmpFldU(i+1,j,k,bi,bj)-tmpFldU(i,j,k,bi,bj) |
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& +tmpFldV(i,j+1,k,bi,bj)-tmpFldV(i,j,k,bi,bj) |
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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+1 |
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vort3(i,j)=(tmpFldV(i,j,k,bi,bj)-tmpFldV(i-1,j,k,bi,bj) |
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& -tmpFldU(i,j,k,bi,bj)+tmpFldU(i,j-1,k,bi,bj) |
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& ) |
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maskZ = (maskW(i,j,k,bi,bj)+maskW(i,j-1,k,bi,bj)) |
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& *(maskS(i,j,k,bi,bj)+maskS(i-1,j,k,bi,bj)) |
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IF (maskZ.LT.1.) vort3(i,j)=0. |
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ENDDO |
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ENDDO |
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|
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C Special stuff for Cubed Sphere |
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IF (useCubedSphereExchange) THEN |
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c--- |
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I=1 |
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J=1 |
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maskZ = maskW(i,j,k,bi,bj)+maskW(i,j-1,k,bi,bj) |
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& +maskS(i,j,k,bi,bj) |
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IF (maskZ.GE.2.) THEN |
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vort3(I,J)= |
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& tmpFldV(I,J,k,bi,bj) |
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& -tmpFldU(I,J,k,bi,bj) |
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& +tmpFldU(I,J-1,k,bi,bj) |
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vort3(I,J)=vort3(I,J)*4.d0/3.d0 |
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ELSE |
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vort3(I,J)=0. |
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ENDIF |
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c--- |
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I=sNx+1 |
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J=1 |
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maskZ = maskW(i,j,k,bi,bj)+maskW(i,j-1,k,bi,bj) |
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& +maskS(i-1,j,k,bi,bj) |
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IF (maskZ.GE.2.) THEN |
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vort3(I,J)= |
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& -tmpFldV(I-1,J,k,bi,bj) |
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& -tmpFldU(I,J,k,bi,bj) |
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& +tmpFldU(I,J-1,k,bi,bj) |
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vort3(I,J)=vort3(I,J)*4.d0/3.d0 |
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ELSE |
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vort3(I,J)=0. |
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ENDIF |
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c--- |
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I=1 |
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J=sNy+1 |
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maskZ = maskW(i,j,k,bi,bj)+maskW(i,j-1,k,bi,bj) |
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& +maskS(i,j,k,bi,bj) |
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IF (maskZ.GE.2.) THEN |
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vort3(I,J)= |
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& tmpFldV(I,J,k,bi,bj) |
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& -tmpFldU(I,J,k,bi,bj) |
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& +tmpFldU(I,J-1,k,bi,bj) |
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vort3(I,J)=vort3(I,J)*4.d0/3.d0 |
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ELSE |
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vort3(I,J)=0. |
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ENDIF |
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c--- |
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I=sNx+1 |
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J=sNy+1 |
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maskZ = maskW(i,j,k,bi,bj)+maskW(i,j-1,k,bi,bj) |
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& +maskS(i-1,j,k,bi,bj) |
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IF (maskZ.GE.2.) THEN |
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vort3(I,J)= |
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& -tmpFldV(I-1,J,k,bi,bj) |
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& -tmpFldU(I,J,k,bi,bj) |
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& +tmpFldU(I,J-1,k,bi,bj) |
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vort3(I,J)=vort3(I,J)*4.d0/3.d0 |
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ELSE |
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vort3(I,J)=0. |
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ENDIF |
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c--- |
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ENDIF |
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ENDIF |
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|
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c---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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IF (N.GT.nShapUV-nShapUVPhys) THEN |
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CALL MOM_CALC_HFACZ(bi,bj,k,hFacZ,r_hFacZ,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 tmpFldU(1-OLx,1-OLy,k,bi,bj), |
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O tmpFldV(1-OLx,1-OLy,k,bi,bj), |
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I myThid) |
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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*tmpFldU(i,j,k,bi,bj) |
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& *rAw(i,j,bi,bj)*_maskW(i,j,k,bi,bj) |
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tmpFldV(i,j,k,bi,bj) = -0.125*tmpFldV(i,j,k,bi,bj) |
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& *rAs(i,j,bi,bj)*_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*tmpFldU(i,j,k,bi,bj) |
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& *Shap_uvLength*Shap_uvLength*_maskW(i,j,k,bi,bj) |
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tmpFldV(i,j,k,bi,bj) = -0.125*tmpFldV(i,j,k,bi,bj) |
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& *Shap_uvLength*Shap_uvLength*_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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ELSE |
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DO J=1,sNy |
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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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& ( hDiv(i,j)-hDiv(i-1,j) |
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& -vort3(i,j+1)+vort3(i,j) |
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& )*maskW(i,j,k,bi,bj) |
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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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tmpFldV(i,j,k,bi,bj) = -0.125* |
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& ( vort3(i+1,j)-vort3(i,j) |
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& +hDiv(i,j)-hDiv(i,j-1) |
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& )*maskS(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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|
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ENDIF |
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|
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ENDDO |
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ENDDO |
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ENDDO |
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C end loop N=1,nShapUV |
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ENDDO |
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|
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c---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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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,Nr |
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DO J=1,sNy+1 |
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DO I=1,sNx |
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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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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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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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CALL EXCH_UV_XYZ_RL(uFld,vFld,.TRUE.,myThid) |
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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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