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C $Header$ |
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C $Name$ |
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|
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#include "GMREDI_OPTIONS.h" |
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|
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CStartOfInterface |
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SUBROUTINE GMREDI_SLOPE_LIMIT( |
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I dSigmaDrReal, |
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I depthZ, |
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U SlopeX, SlopeY, |
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O SlopeSqr, taperFct, |
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I bi,bj, myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE GMREDI_SLOPE_LIMIT | |
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C | o Calculate slopes for use in GM/Redi tensor | |
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C |==========================================================| |
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C | On entry: | |
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C | dSigmaDrReal conatins the d/dz Sigma | |
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C | SlopeX/Y contains X/Y gradients of sigma | |
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C | depthZ conatins the height (m) of level | |
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C | On exit: | |
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C | dSigmaDrReal conatins the effective dSig/dz | |
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C | SlopeX/Y contains X/Y slopes | |
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C | SlopeSqr contains Sx^2+Sy^2 | |
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C | taperFct contains tapering funct. value ; | |
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C | = 1 when using no tapering | |
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C \==========================================================/ |
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IMPLICIT NONE |
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|
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C == Global variables == |
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#include "SIZE.h" |
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#include "GRID.h" |
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#include "EEPARAMS.h" |
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#include "GMREDI.h" |
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#include "PARAMS.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 == Routine arguments == |
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C |
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_RL SlopeX(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL SlopeY(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL dSigmaDrReal(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL SlopeSqr(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL taperFct(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL depthZ |
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INTEGER bi,bj,myThid |
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CEndOfInterface |
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|
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#ifdef ALLOW_GMREDI |
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|
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C == Local variables == |
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_RL Small_Number |
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_RL Small_Taper |
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PARAMETER(Small_Number=1.D-12) |
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PARAMETER(Small_Taper=1.D+03) |
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_RL gradSmod(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL dSigmaDrLtd(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL dRdSigmaLtd(1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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_RL f1,Smod,f2,Rnondim,Cspd,Lrho |
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_RL maxSlopeSqr |
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_RL fpi |
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PARAMETER(fpi=3.141592653589793047592d0) |
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INTEGER i,j |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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act1 = bi - myBxLo(myThid) |
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max1 = myBxHi(myThid) - myBxLo(myThid) + 1 |
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act2 = bj - myByLo(myThid) |
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max2 = myByHi(myThid) - myByLo(myThid) + 1 |
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act3 = myThid - 1 |
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max3 = nTx*nTy |
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act4 = ikey_dynamics - 1 |
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ikey = (act1 + 1) + act2*max1 |
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& + act3*max1*max2 |
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& + act4*max1*max2*max3 |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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|
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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gradSmod(i,j) = 0. _d 0 |
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dSigmaDrLtd(i,j) = 0. _d 0 |
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ENDDO |
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ENDDO |
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|
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IF (GM_taper_scheme.EQ.'orig' .OR. |
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& GM_taper_scheme.EQ.'clipping') THEN |
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|
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C- Original implementation in mitgcmuv |
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C (this turns out to be the same as Cox slope clipping) |
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|
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C- Cox 1987 "Slope clipping" |
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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IF ( SlopeX(i,j)*SlopeX(i,j) + SlopeY(i,j)*SlopeY(i,j) |
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& .EQ. 0. ) THEN |
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gradSmod(i,j) = 0. _d 0 |
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ELSE |
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gradSmod(i,j) = sqrt(SlopeX(i,j)*SlopeX(i,j) |
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& +SlopeY(i,j)*SlopeY(i,j)) |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE gradSmod(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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CADJ STORE dSigmaDrReal(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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#endif |
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|
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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IF (gradSmod(i,j) .NE. 0.) THEN |
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dSigmaDrLtd(i,j) = -gradSmod(i,j)*GM_rMaxSlope |
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IF (dSigmaDrReal(i,j) .GE. dSigmaDrLtd(i,j)) |
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& dSigmaDrReal(i,j) = dSigmaDrLtd(i,j) |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE slopeX(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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CADJ STORE slopeY(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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CADJ STORE dSigmaDrReal(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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#endif |
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|
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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IF (gradSmod(i,j) .EQ. 0.) THEN |
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SlopeX(i,j) = 0. _d 0 |
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SlopeY(i,j) = 0. _d 0 |
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ELSE |
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dRdSigmaLtd(i,j) = 1./dSigmaDrReal(i,j) |
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SlopeX(i,j)=-SlopeX(i,j)*dRdSigmaLtd(i,j) |
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SlopeY(i,j)=-SlopeY(i,j)*dRdSigmaLtd(i,j) |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE slopeX(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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CADJ STORE slopeY(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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#endif |
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|
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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SlopeSqr(i,j)=SlopeX(i,j)*SlopeX(i,j) |
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& +SlopeY(i,j)*SlopeY(i,j) |
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taperFct(i,j)=1. _d 0 |
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ENDDO |
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ENDDO |
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|
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ELSE |
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|
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C---------------------------------------------------------------------- |
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|
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C- Compute the slope, no clipping, but avoid reverse slope in negatively |
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C stratified (Sigma_Z > 0) region : |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE dSigmaDrReal(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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#endif |
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|
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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IF ( dSigmaDrReal(i,j) .NE. 0. ) THEN |
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IF (dSigmaDrReal(i,j).GE.(-Small_Number)) |
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& dSigmaDrReal(i,j) = -Small_Number |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE slopeX(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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CADJ STORE slopeY(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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CADJ STORE dSigmaDrReal(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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#endif |
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|
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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IF ( dSigmaDrReal(i,j) .EQ. 0. ) THEN |
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IF ( SlopeX(i,j) .NE. 0. ) |
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& SlopeX(i,j) = SIGN(Small_taper,SlopeX(i,j)) |
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IF ( SlopeY(i,j) .NE. 0. ) |
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& SlopeY(i,j) = SIGN(Small_taper,SlopeY(i,j)) |
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ELSE |
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dRdSigmaLtd(i,j) = 1./dSigmaDrReal(i,j) |
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SlopeX(i,j) = -SlopeX(i,j)*dRdSigmaLtd(i,j) |
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SlopeY(i,j) = -SlopeY(i,j)*dRdSigmaLtd(i,j) |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE slopeX(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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CADJ STORE slopeY(:,:) = comlev1_bibj, key=ikey, byte=isbyte |
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#endif |
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|
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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SlopeSqr(i,j) = SlopeX(i,j)*SlopeX(i,j) |
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& +SlopeY(i,j)*SlopeY(i,j) |
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taperFct(i,j) = 1. _d 0 |
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ENDDO |
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ENDDO |
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|
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C- Compute the tapering function for the GM+Redi tensor : |
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|
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IF (GM_taper_scheme.EQ.'linear') THEN |
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|
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C- Simplest adiabatic tapering = Smax/Slope (linear) |
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maxSlopeSqr = GM_maxSlope*GM_maxSlope |
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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|
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IF ( SlopeSqr(i,j) .EQ. 0. ) THEN |
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taperFct(i,j) = 1. _d 0 |
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ELSE IF ( SlopeSqr(i,j) .GT. maxSlopeSqr ) THEN |
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taperFct(i,j) = sqrt(maxSlopeSqr / SlopeSqr(i,j)) |
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ENDIF |
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|
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ENDDO |
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ENDDO |
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|
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ELSEIF (GM_taper_scheme.EQ.'gkw91') THEN |
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|
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C- Gerdes, Koberle and Willebrand, Clim. Dyn. 1991 |
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maxSlopeSqr = GM_maxSlope*GM_maxSlope |
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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|
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IF ( SlopeSqr(i,j) .EQ. 0. ) THEN |
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taperFct(i,j) = 1. _d 0 |
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ELSE IF ( SlopeSqr(i,j) .GT. maxSlopeSqr ) THEN |
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taperFct(i,j) = maxSlopeSqr/SlopeSqr(i,j) |
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ENDIF |
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|
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ENDDO |
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ENDDO |
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|
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ELSEIF (GM_taper_scheme.EQ.'dm95') THEN |
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|
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C- Danabasoglu and McWilliams, J. Clim. 1995 |
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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|
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IF ( SlopeSqr(i,j) .EQ. 0. ) THEN |
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taperFct(i,j) = 1. _d 0 |
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ELSE |
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Smod=sqrt(SlopeSqr(i,j)) |
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taperFct(i,j)=0.5*(1.+tanh( (GM_Scrit-Smod)/GM_Sd )) |
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ENDIF |
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ENDDO |
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ENDDO |
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|
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ELSEIF (GM_taper_scheme.EQ.'ldd97') THEN |
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|
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C- Large, Danabasoglu and Doney, JPO 1997 |
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DO j=1-Oly+1,sNy+Oly-1 |
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DO i=1-Olx+1,sNx+Olx-1 |
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|
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IF (SlopeSqr(i,j) .EQ. 0.) THEN |
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taperFct(i,j) = 1. _d 0 |
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ELSE |
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Smod=sqrt(SlopeSqr(i,j)) |
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f1=0.5*(1.+tanh( (GM_Scrit-Smod)/GM_Sd )) |
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Cspd=2. |
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Lrho=100. _d 3 |
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if (FCori(i,j,bi,bj).NE.0.) Lrho=Cspd/abs(Fcori(i,j,bi,bj)) |
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Lrho=min(Lrho , 100. _d 3) |
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Lrho=max(Lrho , 15. _d 3) |
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Rnondim=depthZ/(Lrho*Smod) |
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f2=0.5*(1.+sin( fpi*(Rnondim-0.5))) |
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taperFct(i,j)=f1*f2 |
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ENDIF |
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|
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ENDDO |
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ENDDO |
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|
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ELSEIF (GM_taper_scheme.NE.' ') THEN |
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STOP 'GMREDI_SLOPE_LIMIT: Bad GM_taper_scheme' |
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ENDIF |
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|
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ENDIF |
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|
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|
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#endif /* ALLOW_GMREDI */ |
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|
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RETURN |
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END |
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