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C $Header: /u/gcmpack/MITgcm/pkg/my82/my82_calc.F,v 1.6 2009/10/08 20:07:53 jmc Exp $ |
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C $Name: $ |
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|
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#include "MY82_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: MY82_CALC |
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|
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C !INTERFACE: ====================================================== |
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subroutine MY82_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 MY82_CALC | |
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C | o Compute all MY82 fields defined in MY82.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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IMPLICIT NONE |
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C |
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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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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "MY82.h" |
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#include "GRID.h" |
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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_MY82 |
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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 = -GH/GM |
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C GH - buoyancy freqency after call to Ri_number, later |
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C GH of M. Satoh, Eq. (11.3.45) |
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C GM - vertical shear of velocity after call Ri_number, |
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C later GM of M. Satoh, Eq. (11.3.44) |
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INTEGER I, J, K |
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INTEGER iMin ,iMax ,jMin ,jMax |
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_RL RiFlux, RiTmp |
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_RL SHtmp, bTmp, tkesquare, tkel |
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_RL RiNumber(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL GH(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL GM(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL SH(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL SM(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL tke(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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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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C Initialize local fields |
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DO J=1-OLy,sNy+OLy |
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DO I=1-OLx,sNx+OLx |
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GH(I,J) = 0. _d 0 |
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GM(I,J) = 0. _d 0 |
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ENDDO |
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ENDDO |
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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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SH(I,J,K) = 0. _d 0 |
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SM(I,J,K) = 0. _d 0 |
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tke(I,J,K) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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C first k-loop |
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C compute turbulent kinetic energy from richardson number |
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DO K = 2, Nr |
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CALL MY82_RI_NUMBER( |
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I bi, bj, K, iMin, iMax, jMin, jMax, |
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O RiNumber, GH, GM, |
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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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RiTmp = MIN(RiNumber(I,J),RiMax) |
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btmp = beta1+beta4*RiTmp |
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C M. Satoh, Atmospheric Circulation Dynamics and General |
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C Circulation models, Springer, 2004: Eq. (11.3.60) |
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RiFlux =( btmp - SQRT(btmp*btmp - 4. _d 0 *beta2*beta3*RiTmp) ) |
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& /(2. _d 0*beta2) |
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C M. Satoh: Eq. (11.3.58) |
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SHtmp = (alpha1-alpha2*RiFlux)/(1. _d 0-RiFlux) |
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SH(I,J,K) = SHtmp |
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SM(I,J,K) = SHtmp*(beta1-beta2*RiFlux)/(beta3-beta4*RiFlux) |
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C M. Satoh: Eq. (11.3.53/55) |
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tkesquare = MAX( 0. _d 0, |
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& b1*(SH(I,J,K)*GH(I,J) + SM(I,J,K)*GM(I,J)) ) |
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tke(I,J,K) = sqrt(tkesquare) |
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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,3I3,8E13.5)', 'ml-my82', I,J,K, RiNumber(I,J), |
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CML & RiTmp,RiFlux, |
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CML & SH(I,J,K), SM(I,J,K), GH(I,J), GM(I,J), tke(I,J,K) |
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ENDDO |
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ENDDO |
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C end of first k-loop |
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ENDDO |
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|
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C re-initilialize GM and GH for abuse, they no longer have |
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C the meaning of shear and negative buoyancy frequency |
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DO J=jMin,jMax |
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DO I=iMin,iMax |
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GH(I,J) = 0. _d 0 |
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GM(I,J) = 0. _d 0 |
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ENDDO |
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ENDDO |
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C Find boundary length scale from energy weighted mean. |
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C This is something like "center of mass" of the vertical |
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C tke-distribution |
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C begin second k-loop |
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DO K = 2, Nr |
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DO J=jMin,jMax |
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DO I=iMin,iMax |
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GM(I,J) = GM(I,J) + tke(I,J,K)*rF(K) |
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GH(I,J) = GH(I,J) + tke(I,J,K) |
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ENDDO |
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ENDDO |
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C end of second k-loop |
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END DO |
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C compute boundary length scale MYhbl |
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DO J=jMin,jMax |
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DO I=iMin,iMax |
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IF ( GH(I,J) .EQ. 0. _d 0 ) THEN |
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MYhbl(I,J,bi,bj) = 0. _d 0 |
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ELSE |
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MYhbl(I,J,bi,bj) = -GM(I,J)/GH(I,J)*MYhblScale |
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ENDIF |
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ENDDO |
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ENDDO |
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C begin third k-loop |
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DO K = 1, Nr |
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C integrate tke to find integral length scale |
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DO J=jMin,jMax |
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DO I=iMin,iMax |
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tkel = MYhbl(I,J,bi,bj)*tke(I,J,K) |
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C M. Satoh: Eq. (11.3.43) |
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MYviscAr(I,J,K,bi,bj) = MYhbl(I,J,bi,bj)*tkel*SM(I,J,K) |
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MYdiffKr(I,J,K,bi,bj) = MYhbl(I,J,bi,bj)*tkel*SH(I,J,K) |
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C Set a minium (= background) value |
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MYviscAr(I,J,K,bi,bj) = MAX(MYviscAr(I,J,K,bi,bj), |
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& viscArnr(k) ) |
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MYdiffKr(I,J,K,bi,bj) = MAX(MYdiffKr(I,J,K,bi,bj), |
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& diffKrNrT(k) ) |
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C Set a maximum and mask land point |
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MYviscAr(I,J,K,bi,bj) = MIN(MYviscAr(I,J,K,bi,bj),MYviscMax) |
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& * maskC(I,J,K,bi,bj) |
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MYdiffKr(I,J,K,bi,bj) = MIN(MYdiffKr(I,J,K,bi,bj),MYdiffMax) |
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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 third k-loop |
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ENDDO |
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|
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#endif /* ALLOW_MY82 */ |
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|
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RETURN |
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END |
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