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C $Header: /u/gcmpack/MITgcm/pkg/mom_common/mom_quasihydrostatic.F,v 1.5 2012/12/18 01:18:01 jmc Exp $ |
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C $Name: $ |
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|
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#include "MOM_COMMON_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: MOM_QUASIHYDROSTATIC |
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|
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C !INTERFACE: ========================================================== |
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SUBROUTINE MOM_QUASIHYDROSTATIC( |
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I bi,bj,k, |
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I uFld, vFld, |
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O effectiveBuoy, |
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I myThid ) |
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|
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C !DESCRIPTION: |
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C *==========================================================* |
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C | o SUBROUTINE MOM_QUASIHYDROSTATIC |
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C | Add Quasi-Hydrostatic Terms to buoyancy |
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C *==========================================================* |
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|
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C !USES: =============================================================== |
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IMPLICIT NONE |
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|
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C-- == Global data == |
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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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|
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C-- == Routine arguments == |
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C !INPUT VARIABLES: ==================================================== |
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C bi,bj :: tile indices |
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C k :: vertical level |
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C uFld :: zonal flow |
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C vFld :: meridional flow |
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C myThid :: my Thread Id number |
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INTEGER bi,bj,k |
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_RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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_RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr,nSx,nSy) |
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INTEGER myThid |
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|
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C !OUTPUT/MODIFIED VARIABLES: ========================================== |
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C effectiveBuoy :: Density (z-coord) / specific volume (p-coord) anomaly |
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_RL effectiveBuoy(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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|
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C !LOCAL VARIABLES: ==================================================== |
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C i,j :: loop indices |
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C scalingFactor :: scaling factor (from acceleration to density) |
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INTEGER iMin,iMax,jMin,jMax |
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PARAMETER( iMin = 0 , iMax = sNx+1 ) |
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PARAMETER( jMin = 0 , jMax = sNy+1 ) |
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INTEGER i,j |
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_RL scalingFactor |
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CEOP |
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|
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IF ( usingZCoords ) THEN |
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C-- Z-coordinate case: Input is density anomaly |
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|
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scalingFactor = rhoConst*gravitySign |
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& *recip_gravity*recip_gravFacC(k) |
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C- to reproduce old (wrong) results: |
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c scalingFactor=gravitySign*recip_gravity |
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|
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ELSEIF ( fluidIsWater ) THEN |
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C-- P-coordinate, oceanic case: Input is specific-volume anomaly |
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|
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scalingFactor = recip_rhoConst*recip_gravity |
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c scalingFactor = rVel2wUnit(k) <-- @ interface = wrong location |
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C- should use expression below (consistent with omega <-> w-velocity |
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C conversion) but rhoRef(k) = rho(tRef,sRef,p) is computed |
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C in S/R SET_REF_STATE but is not stored: |
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c scalingFactor = ( oneRL / rhoRef(k) )*recip_gravity |
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|
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ELSE |
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C-- P-coord., Ideal-Gas case: Input is virtual potential temp. anomaly |
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C (see White & Bromley, QJRMS 1995) |
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scalingFactor = tRef(k)*recip_gravity |
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|
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ENDIF |
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|
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IF ( use3dCoriolis ) THEN |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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effectiveBuoy(i,j)=effectiveBuoy(i,j) |
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& +scalingFactor* |
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& fCoriCos(i,j,bi,bj)* |
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& ( angleCosC(i,j,bi,bj)*0.5 _d 0 * |
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& (uFld(i,j,k,bi,bj)+uFld(i+1,j,k,bi,bj)) |
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& -angleSinC(i,j,bi,bj)*0.5 _d 0 * |
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& (vFld(i,j,k,bi,bj)+vFld(i,j+1,k,bi,bj)) |
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& ) |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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IF ( useNHMTerms ) THEN |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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effectiveBuoy(i,j)=effectiveBuoy(i,j) |
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& +scalingFactor* |
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& ( (uFld( i ,j,k,bi,bj)*uFld( i ,j,k,bi,bj) |
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& +uFld(i+1,j,k,bi,bj)*uFld(i+1,j,k,bi,bj)) |
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& + (vFld(i, j ,k,bi,bj)*vFld(i, j ,k,bi,bj) |
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& +vFld(i,j+1,k,bi,bj)*vFld(i,j+1,k,bi,bj)) |
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& )* 0.5 _d 0 * recip_rSphere*recip_deepFacC(k) |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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RETURN |
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END |
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