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C $Header: /u/gcmpack/MITgcm/model/src/diags_phi_rlow.F,v 1.6 2010/01/15 22:39:54 jmc Exp $ |
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C $Name: $ |
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|
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: DIAGS_PHI_RLOW |
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C !INTERFACE: |
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SUBROUTINE DIAGS_PHI_RLOW( |
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I k, bi, bj, iMin,iMax, jMin,jMax, |
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I phiHydF, phiHydC, alphRho, tFld, sFld, |
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I myTime, myIter, myThid) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R DIAGS_PHI_RLOW |
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C | o Diagnose Phi-Hydrostatic at r-lower boundary |
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C | = bottom pressure (ocean in z-coord) ; |
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C | = sea surface elevation (ocean in p-coord) ; |
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C | = height at the top of atmosphere (in p-coord) ; |
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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 "GRID.h" |
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#include "SURFACE.h" |
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#include "DYNVARS.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 bi,bj :: tile index |
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C iMin,iMax,jMin,jMax :: Loop counters |
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C phiHydF :: hydrostatic potential anomaly at middle between |
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C 2 centers k & k+1 (interface k+1) |
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C phiHydC :: hydrostatic potential anomaly at cell center |
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C (atmos: =Geopotential ; ocean-z: =Pressure/rho) |
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C alphRho :: Density (z-coord) or specific volume (p-coord) |
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C tFld :: Potential temp. |
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C sFld :: Salinity |
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C myTime :: Current time |
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C myIter :: Current iteration number |
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C myThid :: my Thread Id number |
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INTEGER k, bi,bj, iMin,iMax, jMin,jMax |
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_RL phiHydF(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL phiHydC(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL alphRho(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL tFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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_RL sFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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_RL myTime |
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INTEGER myIter, myThid |
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|
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#ifdef INCLUDE_PHIHYD_CALCULATION_CODE |
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|
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C i,j :: Loop counters |
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INTEGER i,j |
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_RL zero, one, half |
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_RL ddRloc, ratioRm, ratioRp |
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PARAMETER ( zero= 0. _d 0 , one= 1. _d 0 , half= .5 _d 0 ) |
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CEOP |
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|
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IF ( usingZCoords ) THEN |
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|
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C----- Compute bottom pressure deviation from gravity*rho0*H |
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C Start from phiHyd at the (bottom) tracer point and add Del_h*g*rho_prime |
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C with Del_h = distance from the bottom up to tracer point |
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|
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C-- Initialise to zero (otherwise phi0surf accumulate over land) |
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IF ( k.EQ.1 ) THEN |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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phiHydLow(i,j,bi,bj) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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IF (integr_GeoPot.EQ.1) THEN |
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C -- Finite Volume Form |
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|
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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IF ( k .EQ. kLowC(i,j,bi,bj) ) THEN |
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ddRloc = rC(k)-R_low(i,j,bi,bj) |
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phiHydLow(i,j,bi,bj) = phiHydC(i,j) |
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& + ddRloc*gravity*alphRho(i,j)*recip_rhoConst |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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ELSE |
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C -- Finite Difference Form |
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|
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ratioRm = one |
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ratioRp = one |
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IF (k.GT.1 ) ratioRm = half*drC(k)/(rF(k)-rC(k)) |
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IF (k.LT.Nr) ratioRp = half*drC(k+1)/(rC(k)-rF(k+1)) |
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|
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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IF ( k .EQ. kLowC(i,j,bi,bj) ) THEN |
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ddRloc = rC(k)-R_low(i,j,bi,bj) |
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phiHydLow(i,j,bi,bj) = phiHydC(i,j) |
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& +( MIN(zero,ddRloc)*ratioRm |
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& +MAX(zero,ddRloc)*ratioRp |
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& )*gravity*alphRho(i,j)*recip_rhoConst |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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C -- end if integr_GeoPot = ... |
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ENDIF |
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|
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C -- end usingZCoords |
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ENDIF |
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|
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IF ( k.EQ.Nr ) THEN |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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C -- last level (bottom): rescale (r*) and add surface contribution |
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|
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IF ( usingPCoords ) THEN |
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C -- P coordinate : Phi(R_low) is simply at the top : |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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phiHydLow(i,j,bi,bj) = phiHydF(i,j) |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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#ifdef NONLIN_FRSURF |
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c IF ( select_rStar.GE.2 .AND. nonlinFreeSurf.GE.4 ) THEN |
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IF ( select_rStar.GT.0 .AND. nonlinFreeSurf.GE.4 ) THEN |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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phiHydLow(i,j,bi,bj) = phiHydLow(i,j,bi,bj) |
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& *rStarFacC(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ENDIF |
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#endif /* NONLIN_FRSURF */ |
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|
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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phiHydLow(i,j,bi,bj) = phiHydLow(i,j,bi,bj) |
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& + Bo_surf(i,j,bi,bj)*etaN(i,j,bi,bj) |
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& + phi0surf(i,j,bi,bj) |
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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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C -- end if k=Nr. |
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ENDIF |
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|
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#endif /* INCLUDE_PHIHYD_CALCULATION_CODE */ |
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|
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RETURN |
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END |
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