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C $Header: /u/gcmpack/MITgcm/model/src/impldiff.F,v 1.22 2004/10/22 20:14:46 jmc Exp $ |
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C $Name: $ |
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|
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_OPTIONS.h" |
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|
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CBOP |
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C !ROUTINE: IMPLDIFF |
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C !INTERFACE: |
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SUBROUTINE IMPLDIFF( bi, bj, iMin, iMax, jMin, jMax, |
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I tracerId, KappaRX, recip_hFac, |
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U gXNm1, |
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I myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R IMPLDIFF |
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C | o Solve implicit diffusion equation for vertical |
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C | diffusivity. |
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C *==========================================================* |
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C | o Recoded from 2d intermediate fields to 3d to reduce |
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C | TAMC storage |
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C | o Fixed missing masks for fields a(), c() |
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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 data == |
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#include "SIZE.h" |
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#include "DYNVARS.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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#ifdef ALLOW_AUTODIFF_TAMC |
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#include "tamc_keys.h" |
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#endif |
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|
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine Arguments == |
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C tracerId :: tracer Identificator (if > 0) ; |
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C = 0 or < 0 when solving vertical viscosity implicitly for U or V |
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INTEGER bi,bj,iMin,iMax,jMin,jMax |
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INTEGER tracerId |
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_RL KappaRX(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
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_RS recip_hFac(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr,nSx,nSy) |
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_RL gXnm1(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 !LOCAL VARIABLES: |
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C == Local variables == |
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INTEGER i,j,k |
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_RL deltaTX(Nr) |
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_RL gYnm1(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr,nSx,nSy) |
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_RL a(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
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_RL b(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
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_RL c(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
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_RL bet(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
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_RL gam(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr) |
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#ifdef ALLOW_DIAGNOSTICS |
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INTEGER kk |
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CHARACTER*8 diagName |
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CHARACTER*4 diagSufx |
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#ifdef ALLOW_GENERIC_ADVDIFF |
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CHARACTER*4 GAD_DIAG_SUFX |
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EXTERNAL GAD_DIAG_SUFX |
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#endif |
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LOGICAL DIAGNOSTICS_IS_ON |
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EXTERNAL DIAGNOSTICS_IS_ON |
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_RL df (1-Olx:sNx+Olx,1-Oly:sNy+Oly) |
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#endif /* ALLOW_DIAGNOSTICS */ |
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CEOP |
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|
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cph( |
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cph Not good for TAF: may create irreducible control flow graph |
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cph IF (Nr.LE.1) RETURN |
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cph) |
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|
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IF ( tracerId.GE.1 ) THEN |
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DO k=1,Nr |
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deltaTX(k) = dTtracerLev(k) |
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ENDDO |
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ELSE |
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DO k=1,Nr |
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deltaTX(k) = deltaTmom |
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ENDDO |
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ENDIF |
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|
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C-- Initialise |
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DO k=1,Nr |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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gYNm1(i,j,k,bi,bj) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C-- Old aLower |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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a(i,j,1) = 0. _d 0 |
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ENDDO |
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ENDDO |
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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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a(i,j,k) = -deltaTX(k)*recip_hFac(i,j,k,bi,bj)*recip_drF(k) |
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& *KappaRX(i,j, k )*recip_drC( k ) |
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IF (recip_hFac(i,j,k-1,bi,bj).EQ.0.) a(i,j,k)=0. |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C-- Old aUpper |
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DO k=1,Nr-1 |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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c(i,j,k) = -deltaTX(k)*recip_hFac(i,j,k,bi,bj)*recip_drF(k) |
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& *KappaRX(i,j,k+1)*recip_drC(k+1) |
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IF (recip_hFac(i,j,k+1,bi,bj).EQ.0.) c(i,j,k)=0. |
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ENDDO |
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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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c(i,j,Nr) = 0. _d 0 |
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ENDDO |
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ENDDO |
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|
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C-- Old aCenter |
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DO k=1,Nr |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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b(i,j,k) = 1. _d 0 - c(i,j,k) - a(i,j,k) |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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C-- Old and new gam, bet are the same |
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DO k=1,Nr |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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bet(i,j,k) = 1. _d 0 |
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gam(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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|
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C-- Only need do anything if Nr>1 |
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IF (Nr.GT.1) THEN |
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|
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k = 1 |
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C-- Beginning of forward sweep (top level) |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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IF (b(i,j,1).NE.0.) bet(i,j,1) = 1. _d 0 / b(i,j,1) |
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ENDDO |
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ENDDO |
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|
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ENDIF |
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|
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C-- Middle of forward sweep |
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IF (Nr.GE.2) THEN |
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|
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CADJ loop = sequential |
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DO k=2,Nr |
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|
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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gam(i,j,k) = c(i,j,k-1)*bet(i,j,k-1) |
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IF ( ( b(i,j,k) - a(i,j,k)*gam(i,j,k) ) .NE. 0.) |
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& bet(i,j,k) = 1. _d 0 / ( b(i,j,k) - a(i,j,k)*gam(i,j,k) ) |
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ENDDO |
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ENDDO |
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|
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ENDDO |
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|
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ENDIF |
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|
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|
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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gYNm1(i,j,1,bi,bj) = gXNm1(i,j,1,bi,bj)*bet(i,j,1) |
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ENDDO |
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ENDDO |
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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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gYnm1(i,j,k,bi,bj) = bet(i,j,k)* |
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& (gXnm1(i,j,k,bi,bj) - a(i,j,k)*gYnm1(i,j,k-1,bi,bj)) |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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|
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C-- Backward sweep |
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CADJ loop = sequential |
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DO k=Nr-1,1,-1 |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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gYnm1(i,j,k,bi,bj)=gYnm1(i,j,k,bi,bj) |
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& -gam(i,j,k+1)*gYnm1(i,j,k+1,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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DO k=1,Nr |
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DO j=jMin,jMax |
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DO i=iMin,iMax |
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gXnm1(i,j,k,bi,bj)=gYnm1(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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|
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#ifdef ALLOW_DIAGNOSTICS |
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IF ( useDiagnostics .AND.tracerId.GE.1 ) THEN |
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C-- Set diagnostic suffix for the current tracer |
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#ifdef ALLOW_GENERIC_ADVDIFF |
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diagSufx = GAD_DIAG_SUFX( tracerId, myThid ) |
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#else |
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diagSufx = 'aaaa' |
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#endif |
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diagName = 'DFrI'//diagSufx |
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IF ( DIAGNOSTICS_IS_ON(diagName,myThid) ) THEN |
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DO k= 1,Nr |
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IF ( k.EQ.1 ) THEN |
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C- Note: Needs to call DIAGNOSTICS_FILL at level k=1 even if array == 0 |
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C otherwise counter is not incremented !! |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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df(i,j) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ELSE |
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DO j=1,sNy |
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DO i=1,sNx |
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df(i,j) = |
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& rA(i,j,bi,bj) |
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& * KappaRX(i,j,k)*recip_drC(k) |
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& * (gXnm1(i,j,k,bi,bj) - gXnm1(i,j,k-1,bi,bj)) |
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ENDDO |
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ENDDO |
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ENDIF |
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kk = -k |
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CALL DIAGNOSTICS_FILL(df,diagName, kk,1, 2,bi,bj, myThid) |
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ENDDO |
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ENDIF |
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ENDIF |
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#endif /* ALLOW_DIAGNOSTICS */ |
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|
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RETURN |
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END |
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