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dgoldberg |
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C $Header: /u/gcmpack/MITgcm/pkg/shelfice/shelfice_update_masks.F,v 1.6 2014/09/11 19:20:38 jmc Exp $ |
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C $Name: $ |
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#include "SHELFICE_OPTIONS.h" |
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#ifdef ALLOW_CTRL |
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# include "CTRL_OPTIONS.h" |
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#endif |
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CBOP |
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C !ROUTINE: SHELFICE_UPDATE_MASKS |
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C !INTERFACE: |
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SUBROUTINE SHELFICE_UPDATE_MASKS_JJ( |
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I rF, recip_drF, |
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U hFacC, |
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I myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE SHELFICE_UPDATE_MASKS |
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C | o modify topography factor hFacC according to ice shelf |
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C | topography |
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C *==========================================================* |
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C \ev |
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C !USES: |
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IMPLICIT NONE |
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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 "DYNVARS.h" |
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#include "SURFACE.h" |
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#ifdef ALLOW_SHELFICE |
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# include "SHELFICE.h" |
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#endif /* ALLOW_SHELFICE */ |
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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C rF :: R-coordinate of face of cell (units of r). |
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C recip_drF :: Recipricol of cell face separation along Z axis ( units of r ). |
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C hFacC :: Fraction of cell in vertical which is open (see GRID.h) |
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C myThid :: Number of this instance of SHELFICE_UPDATE_MASKS |
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_RS rF (1:Nr+1) |
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_RS recip_drF (1:Nr) |
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_RS hFacC (1-OLx:sNx+OLx,1-OLy:sNy+OLy,1:Nr,nSx,nSy) |
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INTEGER myThid |
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#ifdef ALLOW_SHELFICE |
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C bi,bj :: tile indices |
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C I,J,K :: Loop counters |
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INTEGER bi, bj |
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INTEGER I, J, K |
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_RL hFacCtmp |
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_RL hFacMnSz |
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c _RS R_shelfIceOld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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CEOP |
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C initialize R_shelfIce |
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c DO bj = myByLo(myThid), myByHi(myThid) |
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c DO bi = myBxLo(myThid), myBxHi(myThid) |
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c DO j=1-OLy,sNy+OLy |
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c DO i=1-OLx,sNx+OLx |
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c R_shelfIceOld(i,j,bi,bj) = R_shelfIce(i,j,bi,bj) |
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c R_shelfIce(i,j,bi,bj) = 0. _d 0 |
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c ENDDO |
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c ENDDO |
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c ENDDO |
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c ENDDO |
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c IF ( SHELFICEtopoFile .NE. ' ' ) THEN |
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c _BARRIER |
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C Read the shelfIce draught using the mid-level I/O pacakage read_write_rec |
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C The 0 is the "iteration" argument. The 1 is the record number. |
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c CALL READ_REC_XY_RS( SHELFICEtopoFile, R_shelfIce, |
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c & 1, 0, myThid ) |
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C Read the shelfIce draught using the mid-level I/O pacakage read_write_fld |
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C The 0 is the "iteration" argument. The ' ' is an empty suffix |
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C CALL READ_FLD_XY_RS( SHELFICEtopoFile, ' ', R_shelfIce, |
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C & 0, myThid ) |
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c ELSE |
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c DO bj = myByLo(myThid), myByHi(myThid) |
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c DO bi = myBxLo(myThid), myBxHi(myThid) |
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c DO j=1-OLy,sNy+OLy |
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c DO i=1-OLx,sNx+OLx |
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c |
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c R_shelfIce(i,j,bi,bj) = R_shelfIceOld(i,j,bi,bj) |
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c |
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c ENDDO |
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c ENDDO |
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c ENDDO |
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c ENDDO |
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c ENDIF |
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C- Update etaN |
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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 J = 1-OLy,sNy+OLy |
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DO I = 1-OLx,sNx+OLx |
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IF ( R_shelfice(I,J,bi,bj) .LT. 0.0) THEN |
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IF (etah(I,J,bi,bj) .GT. SHELFICESplitThreshold ) THEN |
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K = MAX(1,kTopC(I,J,bi,bj)) |
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etaN(I,J,bi,bj) = etaN(I,J,bi,bj) - 1/recip_drF(K) |
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etaH(I,J,bi,bj) = etaH(I,J,bi,bj) - 1/recip_drF(K) |
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R_shelfIce(I,J,bi,bj) = R_shelfIce(I,J,bi,bj)+1/recip_drF(K) |
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uVel(I,J,K-1,bi,bj)=uVel(I,J,K,bi,bj) |
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uVel(I+1,J,K-1,bi,bj)=uVel(I+1,J,K,bi,bj) |
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vVel(I,J,K-1,bi,bj)=vVel(I,J,K,bi,bj) |
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vVel(I,J+1,K-1,bi,bj)=vVel(I,J+1,K,bi,bj) |
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gvnm1(I,J,K-1,bi,bj)=0.0 |
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gvnm1(I,J+1,K-1,bi,bj)=0.0 |
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gunm1(I,J,K-1,bi,bj)=0.0 |
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gunm1(I+1,J,K-1,bi,bj)=0.0 |
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salt(I,J,K-1,bi,bj)=salt(I,J,K,bi,bj) |
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theta(I,J,K-1,bi,bj)=theta(I,J,K,bi,bj) |
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hfac_surfc(I,J,bi,bj)=hfac_surfc(I,J,bi,bj)-1.0 |
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hfac_surfnm1c(I,J,bi,bj)=hfac_surfc(I,J,bi,bj) |
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hfacC(I,J,K,bi,bj)=1.0 |
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ENDIF |
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IF (etah(I,J,bi,bj) .LT. SHELFICEMergeThreshold ) THEN |
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K = MAX(1,kTopC(I,J,bi,bj)) |
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salt(I,J,K+1,bi,bj)=((salt(I,J,K,bi,bj)*(1/recip_drF(K)+ |
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& etaN(I,J,bi,bj)))+(salt(I,J,K+1,bi,bj)*1/recip_drF(K+1)))/( |
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& 1/recip_drF(K)+1/recip_drF(K+1)+etaN(I,J,bi,bj)) |
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theta(I,J,K+1,bi,bj)=((theta(I,J,K,bi,bj)*(1/recip_drF(K)+ |
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& etaN(I,J,bi,bj)))+(theta(I,J,K+1,bi,bj)*1/recip_drF(K+1)))/( |
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& 1/recip_drF(K)+1/recip_drF(K+1)+etaN(I,J,bi,bj)) |
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vVel(I,J,K+1,bi,bj)=((vVel(I,J,K,bi,bj)*(1/recip_drF(K)+ |
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& etaN(I,J,bi,bj)))+(vVel(I,J,K+1,bi,bj)*1/recip_drF(K+1)))/( |
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& 1/recip_drF(K)+1/recip_drF(K+1)+etaN(I,J,bi,bj)) |
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vVel(I,J+1,K+1,bi,bj)=((vVel(I,J+1,K,bi,bj)*(1/recip_drF(K)+ |
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& etaN(I,J,bi,bj)))+(vVel(I,J+1,K+1,bi,bj)*1/recip_drF(K+1)))/ |
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& (1/recip_drF(K)+1/recip_drF(K+1)+etaN(I,J,bi,bj)) |
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uVel(I,J,K+1,bi,bj)=((uVel(I,J,K,bi,bj)*(1/recip_drF(K)+ |
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& etaN(I,J,bi,bj)))+(uVel(I,J,K+1,bi,bj)*1/recip_drF(K+1)))/( |
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& 1/recip_ drF(K)+1/recip_drF(K+1)+etaN(I,J,bi,bj)) |
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uVel(I+1,J,K+1,bi,bj)=((uVel(I+1,J,K,bi,bj)*(1/recip_drF(K)+ |
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& etaN(I,J,bi,bj)))+(uVel(I+1,J,K+1,bi,bj)*1/recip_drF(K+1)))/ |
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& (1/recip_drF(K)+1/recip_drF(K+1)+etaN(I,J,bi,bj)) |
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etaN(I,J,bi,bj) = etaN(I,J,bi,bj) +1/recip_drF(K) |
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etaH(I,J,bi,bj) = etaH(I,J,bi,bj) +1/recip_drF(K) |
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R_shelfice(I,J,bi,bj) = R_shelfice(I,J,bi,bj) -1/recip_drF(K) |
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gvnm1(I,J,K+1,bi,bj)=0.0 |
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gvnm1(I,J+1,K+1,bi,bj)=0.0 |
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gunm1(I,J,K+1,bi,bj)=0.0 |
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gunm1(I+1,J,K+1,bi,bj)=0.0 |
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hfac_surfc(I,J,bi,bj)=hfac_surfc(I,J,bi,bj)+1.0 |
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c hfac_surfnm1c(I,J,bi,bj)=hfac_surfc(I,J,bi,bj) |
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hfacC(I,J,K,bi,bj)=1.0 |
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ENDIF |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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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 J = 1-OLy,sNy+OLy |
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DO I = 1-OLx,sNx+OLx |
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etaH(I,J,bi,bj)=etaN(I,J,bi,bj) |
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etaHnm1(I,J,bi,bj)=etaH(I,J,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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DO bj = myByLo(myThid), myByHi(myThid) |
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DO bi = myBxLo(myThid), myBxHi(myThid) |
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DO J = 1-OLy,sNy+OLy |
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DO I = 1-OLx,sNx+OLx |
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DO K = 1, Nr |
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c gvnm1(I,J,K,bi,bj)=0.0 |
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c gunm1(I,J,K,bi,bj)=0.0 |
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c gwnm1(I,J,K,bi,bj)=0.0 |
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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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C- fill in the overlap (+ BARRIER): |
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_EXCH_XY_RS(R_shelfIce, myThid ) |
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C-- Calculate lopping factor hFacC : Remove part outside of the domain |
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C taking into account the Reference (=at rest) Surface Position Ro_shelfIce |
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DO bj=myByLo(myThid), myByHi(myThid) |
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DO bi=myBxLo(myThid), myBxHi(myThid) |
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C-- compute contributions of shelf ice to looping factors |
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DO K=1, Nr |
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hFacMnSz=max( hFacMin, min(hFacMinDr*recip_drF(k),1. _d 0) ) |
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DO J=1-OLy,sNy+OLy |
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DO I=1-OLx,sNx+OLx |
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C o Non-dimensional distance between grid boundary and model surface |
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hFacCtmp = (rF(k)-R_shelfIce(I,J,bi,bj))*recip_drF(K) |
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C o Reduce the previous fraction : substract the outside part. |
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hFacCtmp = hFacC(I,J,K,bi,bj) - max( hFacCtmp, 0. _d 0) |
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C o set to zero if empty Column : |
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hFacCtmp = max( hFacCtmp, 0. _d 0) |
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C o Impose minimum fraction and/or size (dimensional) |
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IF (hFacCtmp.LT.hFacMnSz) THEN |
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IF (hFacCtmp.LT.hFacMnSz*0.5) THEN |
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hFacC(I,J,K,bi,bj)=0. |
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ELSE |
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hFacC(I,J,K,bi,bj)=hFacMnSz |
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ENDIF |
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ELSE |
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hFacC(I,J,K,bi,bj)=hFacCtmp |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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#ifdef ALLOW_SHIFWFLX_CONTROL |
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C maskSHI is a hack to play along with the general ctrl-package |
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C infrastructure, where only the k=1 layer of a 3D mask is used |
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C for 2D fields. We cannot use maskInC instead, because routines |
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C like ctrl_get_gen and ctrl_set_unpack_xy require 3D masks. |
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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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maskSHI(I,J,K,bi,bj) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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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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IF ( ABS(R_shelfice(I,J,bi,bj)) .GT. 0. _d 0 |
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& .AND. hFacC(I,J,K,bi,bj) .NE. 0. _d 0 ) THEN |
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maskSHI(I,J,K,bi,bj) = 1. _d 0 |
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maskSHI(I,J,1,bi,bj) = 1. _d 0 |
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ENDIF |
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ENDDO |
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ENDDO |
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ENDDO |
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#endif /* ALLOW_SHIFWFLX_CONTROL */ |
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C - end bi,bj loops. |
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ENDDO |
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ENDDO |
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#endif /* ALLOW_SHELFICE */ |
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RETURN |
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END |
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