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C $Header: /u/gcmpack/MITgcm/model/src/update_etaws.F,v 1.1 2011/12/08 22:35:43 jmc Exp $ |
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C $Name: $ |
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: UPDATE_ETAWS |
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C !INTERFACE: |
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SUBROUTINE UPDATE_ETAWS( myTime, myIter, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE UPDATE_ETAWS |
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C | o For hybrid sigma-coordinate, derive SSH value |
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C | (etaHw & etaHs) and SSH tendency (dEtaWdt & dEtaSdt) |
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C | at grid-cell Western and Southern edges. |
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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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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 "GRID.h" |
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#include "SURFACE.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 myTime :: Current time in simulation |
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C myIter :: Current iteration number |
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C myThid :: my Thread Id number |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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|
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C !LOCAL VARIABLES: |
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#ifdef EXACT_CONSERV |
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C Local variables in common block |
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|
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#ifdef NONLIN_FRSURF |
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# ifndef DISABLE_SIGMA_CODE |
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C Local variables |
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C i,j,bi,bj :: Loop counters |
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INTEGER i,j,bi,bj |
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CEOP |
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IF ( nonlinFreeSurf.GT.0 .AND. selectSigmaCoord.NE.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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C- 1rst bi,bj loop : |
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|
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C-- copy etaHX -> dEtaXdt |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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dEtaWdt(i,j,bi,bj) = etaHw(i,j,bi,bj) |
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dEtaSdt(i,j,bi,bj) = etaHs(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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|
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DO j=1,sNy+1 |
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DO i=1,sNx+1 |
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etaHw(i,j,bi,bj) = ( etaH (i-1,j,bi,bj) |
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& + etaH ( i ,j,bi,bj) )*0.5 _d 0 |
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etaHs(i,j,bi,bj) = ( etaH (i,j-1,bi,bj) |
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& + etaH (i, j ,bi,bj) )*0.5 _d 0 |
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c etaHw(i,j,bi,bj) = 0.5 _d 0 |
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c & *( etaH (i-1,j,bi,bj)*rA(i-1,j,bi,bj) |
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c & + etaH ( i ,j,bi,bj)*rA( i ,j,bi,bj) |
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c & )*recip_rAw(i,j,bi,bj) |
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c etaHs(i,j,bi,bj) = 0.5 _d 0 |
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c & *( etaH (i,j-1,bi,bj)*rA(i,j-1,bi,bj) |
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c & + etaH (i, j ,bi,bj)*rA(i, j ,bi,bj) |
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c & )*recip_rAs(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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|
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C- end 1rst bi,bj loop. |
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ENDDO |
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ENDDO |
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|
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CALL EXCH_UV_XY_RL( etaHw, etaHs, .FALSE., 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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C- 2nd bi,bj loop : |
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|
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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dEtaWdt(i,j,bi,bj) = ( etaHw(i,j,bi,bj) |
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& - dEtaWdt(i,j,bi,bj) )/deltaTfreesurf |
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dEtaSdt(i,j,bi,bj) = ( etaHs(i,j,bi,bj) |
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& - dEtaSdt(i,j,bi,bj) )/deltaTfreesurf |
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ENDDO |
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ENDDO |
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|
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C- end 2nd bi,bj loop. |
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ENDDO |
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ENDDO |
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|
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ENDIF |
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# endif /* DISABLE_SIGMA_CODE */ |
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#endif /* NONLIN_FRSURF */ |
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|
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#endif /* EXACT_CONSERV */ |
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|
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RETURN |
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END |
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