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C $Header: /u/gcmpack/MITgcm/model/src/timestep_wvel.F,v 1.6 2010/01/23 00:04:03 jmc Exp $ |
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C $Name: $ |
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#include "CPP_OPTIONS.h" |
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CBOP |
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C !ROUTINE: TIMESTEP_WVEL |
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C !INTERFACE: |
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SUBROUTINE TIMESTEP_WVEL( |
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I bi,bj, myTime, myIter, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R TIMESTEP_WVEL |
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C | o Step model vertical velocity forward in time |
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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 "GRID.h" |
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#include "DYNVARS.h" |
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#include "NH_VARS.h" |
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c #include "SURFACE.h" |
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine Arguments == |
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C bi, bj :: Tile indices |
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C myTime :: Current time in simulation |
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C myIter :: Current iteration number in simulation |
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C myThid :: my Thread Id. number |
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INTEGER bi,bj |
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_RL myTime |
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INTEGER myIter, myThid |
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#ifdef ALLOW_NONHYDROSTATIC |
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C iMin,iMax :: 1rst loop counter range |
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C jMin,jMax :: 2nd loop counter range |
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C i,j,k :: Loop counters |
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C gWtmp :: temporary array for vertical momentum tendency |
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INTEGER iMin,iMax,jMin,jMax |
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INTEGER i, j, k, km1 |
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_RL gWtmp(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL tmpFac, nh_Fac, igwFac |
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PARAMETER( iMin = 1 , iMax = sNx ) |
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PARAMETER( jMin = 1 , jMax = sNy ) |
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CEOP |
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igwFac = 0. _d 0 |
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IF ( implicitIntGravWave ) igwFac = 1. _d 0 |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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IF ( nonHydrostatic ) THEN |
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nh_Fac = 0. |
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IF ( nh_Am2.NE.0. ) nh_Fac = 1. _d 0 / nh_Am2 |
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DO k=1,Nr |
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km1 = MAX( k-1, 1 ) |
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IF ( implicitNHPress.NE.1. _d 0 ) THEN |
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C-- add explicit part of NH pressure gradient: |
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tmpFac = pfFacMom*(1. _d 0 - implicitNHPress) |
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& * wUnit2rVel(k)*wUnit2rVel(k)*recip_rhoFacF(k) |
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IF ( k.GE.2 ) THEN |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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gW(i,j,k,bi,bj) = gW(i,j,k,bi,bj) |
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& - tmpFac*rkSign*recip_drC(k) |
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& *( phi_nh(i,j,k,bi,bj) - phi_nh(i,j,k-1,bi,bj) ) |
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ENDDO |
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ENDDO |
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ELSEIF ( selectNHfreeSurf.GE.1 ) THEN |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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gW(i,j,k,bi,bj) = gW(i,j,k,bi,bj) |
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& - tmpFac*rkSign*recip_drC(k) |
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& *( phi_nh(i,j,k,bi,bj) - dPhiNH(i,j,bi,bj) ) |
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ENDDO |
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ENDDO |
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ENDIF |
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ENDIF |
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C apply mask to gW and keep a copy of wVel in gW: |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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gWtmp(i,j) = gW(i,j,k,bi,bj) |
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& *maskC(i,j,k,bi,bj)*maskC(i,j,km1,bi,bj) |
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gW(i,j,k,bi,bj) = wVel(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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C Step forward vertical velocity |
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tmpFac = nh_Fac + igwFac*wUnit2rVel(k)*wUnit2rVel(k) |
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& *dBdrRef(k)*deltaTMom*dTtracerLev(k) |
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IF (tmpFac.GT.0. ) tmpFac = 1. _d 0 / tmpFac |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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wVel(i,j,k,bi,bj) = wVel(i,j,k,bi,bj) |
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& + deltaTmom*tmpFac*gWtmp(i,j) |
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ENDDO |
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ENDDO |
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C- End of k loop |
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ENDDO |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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ELSEIF ( implicitIntGravWave ) THEN |
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C keep a copy of wVel in gW: |
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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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gW(i,j,k,bi,bj) = wVel(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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C- End if nonHydrostatic / elseif implicitIntGravWave |
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ENDIF |
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#endif /* ALLOW_NONHYDROSTATIC */ |
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RETURN |
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END |
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