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C $Header: /u/gcmpack/MITgcm/model/src/calc_grad_phi_hyd.F,v 1.2 2003/02/09 02:00:50 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: CALC_GRAD_PHI_HYD |
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C !INTERFACE: |
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SUBROUTINE CALC_GRAD_PHI_HYD( |
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I k, bi, bj, iMin,iMax, jMin,jMax, |
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I phiHydC, alphRho, tFld, sFld, |
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O dPhiHydX, dPhiHydY, |
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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 CALC_GRAD_PHI_HYD |
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C | o Calculate the gradient of Hydrostatic potential anomaly |
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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 phiHydC :: Hydrostatic Potential anomaly |
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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 dPhiHydX,Y :: Gradient (X & Y directions) of Hyd. Potential |
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C myTime :: Current time |
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C myIter :: Current iteration number |
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C myThid :: Instance number for this call of the routine. |
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INTEGER k, bi,bj, iMin,iMax, jMin,jMax |
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c _RL phiHyd(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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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 dPhiHydX(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL dPhiHydY(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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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 varLoc(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL factorZ, factorP, conv_theta2T |
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CEOP |
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|
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#ifdef NONLIN_FRSURF |
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IF (select_rStar.GE.1 .AND. nonlinFreeSurf.GE.4 ) THEN |
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DO j=jMin-1,jMax |
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DO i=iMin-1,iMax |
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varLoc(i,j) = phiHydC(i,j)*rStarFacC(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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ELSE |
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#else /* NONLIN_FRSURF */ |
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IF (.TRUE.) THEN |
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#endif /* NONLIN_FRSURF */ |
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DO j=jMin-1,jMax |
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DO i=iMin-1,iMax |
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varLoc(i,j) = phiHydC(i,j)+phi0surf(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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C-- Zonal & Meridional gradient of potential anomaly |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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dPhiHydX(i,j) = _recip_dxC(i,j,bi,bj) |
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& *( varLoc(i,j)-varLoc(i-1,j) ) |
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dPhiHydY(i,j) = _recip_dyC(i,j,bi,bj) |
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& *( varLoc(i,j)-varLoc(i,j-1) ) |
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ENDDO |
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ENDDO |
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|
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#ifdef NONLIN_FRSURF |
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IF (select_rStar.GE.2 .AND. nonlinFreeSurf.GE.1 ) THEN |
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IF ( buoyancyRelation .EQ. 'OCEANIC' ) THEN |
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C-- z* coordinate slope term: rho'/rho0 * Grad_r(g.z) |
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factorZ = gravity*recip_rhoConst*0.5 _d 0 |
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DO j=jMin-1,jMax |
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DO i=iMin-1,iMax |
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varLoc(i,j) = etaH(i,j,bi,bj) |
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& *(1. _d 0 + rC(k)*recip_Rcol(i,j,bi,bj)) |
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ENDDO |
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ENDDO |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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dPhiHydX(i,j) = dPhiHydX(i,j) |
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& +factorZ*(alphRho(i-1,j)+alphRho(i,j)) |
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& *(varLoc(i,j)-varLoc(i-1,j)) |
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& *recip_dxC(i,j,bi,bj) |
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dPhiHydY(i,j) = dPhiHydY(i,j) |
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& +factorZ*(alphRho(i,j-1)+alphRho(i,j)) |
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& *(varLoc(i,j)-varLoc(i,j-1)) |
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& *recip_dyC(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ELSEIF (buoyancyRelation .EQ. 'OCEANICP' ) THEN |
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C-- p* coordinate slope term: alpha' * Grad_r( p ) |
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factorP = 0.5 _d 0 |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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dPhiHydX(i,j) = dPhiHydX(i,j) |
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& +factorP*(alphRho(i-1,j)+alphRho(i,j)) |
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& *(rStarFacC(i,j,bi,bj)-rStarFacC(i-1,j,bi,bj)) |
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& *rC(k)*recip_dxC(i,j,bi,bj) |
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dPhiHydY(i,j) = dPhiHydY(i,j) |
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& +factorP*(alphRho(i,j-1)+alphRho(i,j)) |
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& *(rStarFacC(i,j,bi,bj)-rStarFacC(i,j-1,bi,bj)) |
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& *rC(k)*recip_dyC(i,j,bi,bj) |
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ENDDO |
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ENDDO |
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ELSEIF ( buoyancyRelation .EQ. 'ATMOSPHERIC' ) THEN |
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C-- p* coordinate slope term: alpha' * Grad_r( p ) |
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conv_theta2T = (rC(k)/atm_Po)**atm_kappa |
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factorP = (atm_Rd/rC(k))*conv_theta2T*0.5 _d 0 |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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dPhiHydX(i,j) = dPhiHydX(i,j) |
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& +factorP*(tFld(i-1,j,k,bi,bj)+tFld(i,j,k,bi,bj)) |
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& *(rStarFacC(i,j,bi,bj)-rStarFacC(i-1,j,bi,bj)) |
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& *rC(k)*recip_dxC(i,j,bi,bj) |
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dPhiHydY(i,j) = dPhiHydY(i,j) |
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& +factorP*(tFld(i,j-1,k,bi,bj)+tFld(i,j,k,bi,bj)) |
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& *(rStarFacC(i,j,bi,bj)-rStarFacC(i,j-1,bi,bj)) |
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& *rC(k)*recip_dyC(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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#endif /* NONLIN_FRSURF */ |
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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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