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C $Header: /u/gcmpack/MITgcm/pkg/pp81/pp81_calc.F,v 1.5 2010/01/03 19:17:01 jmc Exp $ |
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C $Name: $ |
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|
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#include "PP81_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: PP81_CALC |
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|
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C !INTERFACE: ======================================================= |
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subroutine PP81_CALC( |
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I bi, bj, sigmaR, myTime, myIter, myThid ) |
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|
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE PP81_CALC | |
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C | o Compute all PP81 fields defined in PP81.h | |
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C *==========================================================* |
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C | This subroutine is based on SPEM code | |
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C *==========================================================* |
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|
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C global parameters updated by pp_calc |
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C PPviscAz :: PP eddy viscosity coefficient (m^2/s) |
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C PPdiffKzT :: PP diffusion coefficient for temperature (m^2/s) |
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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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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "PP81.h" |
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#include "GRID.h" |
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#ifdef ALLOW_AUTODIFF_TAMC |
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#include "tamc.h" |
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#include "tamc_keys.h" |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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C !INPUT PARAMETERS: =================================================== |
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C Routine arguments |
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C bi, bj :: Current tile indices |
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C sigmaR :: Vertical gradient of iso-neutral density |
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C myTime :: Current time in simulation |
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C myIter :: Current time-step number |
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C myThid :: My Thread Id number |
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INTEGER bi, bj |
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_RL sigmaR(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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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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#ifdef ALLOW_PP81 |
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C !LOCAL VARIABLES: ==================================================== |
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c Local constants |
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C imin, imax, jmin, jmax - array computation indices |
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C RiNumber - Richardson Number |
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INTEGER I, J, K |
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INTEGER iMin ,iMax ,jMin ,jMax |
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_RL denom, PPviscTmp |
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_RL RiNumber(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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CEOP |
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iMin = 2-OLx |
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iMax = sNx+OLx-1 |
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jMin = 2-OLy |
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jMax = sNy+OLy-1 |
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|
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DO K = 2, Nr |
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CALL PP81_RI_NUMBER( |
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I bi, bj, K, iMin, iMax, jMin, jMax, |
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O RiNumber, |
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I myTime, myThid ) |
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DO J=jMin,jMax |
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DO I=iMin,iMax |
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IF ( RiNumber(I,J) .LT. RiLimit ) THEN |
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denom = 1.0 + PPalpha*RiLimit |
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PPviscTmp = PPviscMax |
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ELSE |
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denom = 1.0 + PPalpha*RiNumber(I,J) |
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PPviscTmp = PPnu0/(denom**PPnRi) |
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ENDIF |
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C assign a minium ( = background ) value |
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PPviscAr(I,J,K,bi,bj) = MAX(PPviscTmp,viscArNr(k)) |
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PPdiffKr(I,J,K,bi,bj) = MAX(PPviscAr(I,J,K,bi,bj)/denom, |
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& diffKrNrT(k)) |
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CML if ( k.eq.2 .and. i.ge.1 .and. i.le.sNx .and. j.eq.1) |
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CML & print '(A,3I3,5E14.5)', 'ml-pp81', I,J,K, RiLimit, |
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CML & RiNumber(I,J),denom, |
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CML & PPviscAr(I,J,K,bi,bj), PPdiffKr(I,J,K,bi,bj) |
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ENDDO |
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ENDDO |
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#ifdef ALLOW_PP81_LOWERBOUND |
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CRT This is where the lower limit for subsurface layers |
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CRT (BRIOS special) is set. |
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IF ( (usingZCoords .AND. K .EQ. 2) .OR. |
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& (usingPCoords .AND. K .EQ. Nr) ) THEN |
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DO J=jMin,jMax |
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DO I=iMin,iMax |
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PPviscAr(I,J,K,bi,bj) = MAX(PPviscMin,PPviscAr(I,J,K,bi,bj)) |
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PPdiffKr(I,J,K,bi,bj) = MAX(PPdiffMin,PPdiffKr(I,J,K,bi,bj)) |
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ENDDO |
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ENDDO |
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ENDIF |
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#endif /* ALLOW_PP81_LOWERBOUND */ |
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C Mask land points |
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DO J=jMin,jMax |
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DO I=iMin,iMax |
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PPviscAr(I,J,K,bi,bj) = PPviscAr(I,J,K,bi,bj) |
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& * maskC(I,J,K,bi,bj) |
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PPdiffKr(I,J,K,bi,bj) = PPdiffKr(I,J,K,bi,bj) |
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& * maskC(I,J,K,bi,bj) |
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ENDDO |
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ENDDO |
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C end K-loop |
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ENDDO |
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|
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#endif /* ALLOW_PP81 */ |
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|
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RETURN |
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END |
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