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adcroft |
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C $Header: /u/gcmpack/models/MITgcmUV/pkg/generic_advdiff/gad_advection.F,v 1.1 2001/09/10 01:22:48 adcroft Exp $ |
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C $Name: $ |
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adcroft |
1.1 |
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#include "GAD_OPTIONS.h" |
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SUBROUTINE GAD_ADVECTION(bi,bj,advectionScheme,tracerIdentity, |
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U Tracer,Gtracer, |
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I myTime,myIter,myThid) |
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C /==========================================================\ |
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C | SUBROUTINE GAD_ADVECTION | |
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C | o Solves the pure advection tracer equation. | |
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C |==========================================================| |
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C \==========================================================/ |
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IMPLICIT NONE |
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C == Global variables === |
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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 "DYNVARS.h" |
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#include "GRID.h" |
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#include "GAD.h" |
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C == Routine arguments == |
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INTEGER bi,bj |
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INTEGER advectionScheme |
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INTEGER tracerIdentity |
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_RL Tracer(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr,nSx,nSy) |
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_RL Gtracer(1-Olx:sNx+Olx,1-Oly:sNy+Oly,Nr,nSx,nSy) |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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C == Local variables |
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_RS maskUp (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER iMin,iMax,jMin,jMax |
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INTEGER i,j,k,kup,kDown,kp1 |
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_RS xA (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RS yA (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL uTrans (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL vTrans (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL rTrans (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL af (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL fVerT (1-OLx:sNx+OLx,1-OLy:sNy+OLy,2) |
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_RL localTij(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL localTijk(1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nr) |
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_RL kp1Msk |
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C-- Set up work arrays with valid (i.e. not NaN) values |
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C These inital values do not alter the numerical results. They |
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C just ensure that all memory references are to valid floating |
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C point numbers. This prevents spurious hardware signals due to |
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C uninitialised but inert locations. |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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xA(i,j) = 0. _d 0 |
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yA(i,j) = 0. _d 0 |
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uTrans(i,j) = 0. _d 0 |
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vTrans(i,j) = 0. _d 0 |
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rTrans(i,j) = 0. _d 0 |
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fVerT(i,j,1) = 0. _d 0 |
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fVerT(i,j,2) = 0. _d 0 |
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ENDDO |
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ENDDO |
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iMin = 1-OLx |
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iMax = sNx+OLx |
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jMin = 1-OLy |
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jMax = sNy+OLy |
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C-- Start of k loop for horizontal fluxes |
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DO k=1,Nr |
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C-- Get temporary terms used by tendency routines |
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CALL CALC_COMMON_FACTORS ( |
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I bi,bj,iMin,iMax,jMin,jMax,k, |
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O xA,yA,uTrans,vTrans,rTrans,maskUp, |
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I myThid) |
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C-- Make local copy of tracer array |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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localTij(i,j)=tracer(i,j,k,bi,bj) |
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ENDDO |
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ENDDO |
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C- Advective flux in X |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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af(i,j) = 0. |
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ENDDO |
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ENDDO |
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IF (advectionScheme.EQ.ENUM_FLUX_LIMIT) THEN |
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CALL GAD_FLUXLIMIT_ADV_X( |
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& bi,bj,k,deltaTtracer,uTrans,uVel,localTij,af,myThid) |
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ELSEIF (advectionScheme.EQ.ENUM_DST3 ) THEN |
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CALL GAD_DST3_ADV_X( |
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& bi,bj,k,deltaTtracer,uTrans,uVel,localTij,af,myThid) |
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ELSEIF (advectionScheme.EQ.ENUM_DST3_FLUX_LIMIT ) THEN |
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CALL GAD_DST3FL_ADV_X( |
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& bi,bj,k,deltaTtracer,uTrans,uVel,localTij,af,myThid) |
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ELSE |
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STOP 'GAD_ADVECTION: adv. scheme incompatibale with mutli-dim' |
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ENDIF |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx-1 |
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localTij(i,j)=localTij(i,j)-deltaTtracer* |
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& _recip_hFacC(i,j,k,bi,bj)*recip_drF(k) |
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& *recip_rA(i,j,bi,bj) |
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& *( af(i+1,j)-af(i,j) |
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& -tracer(i,j,k,bi,bj)*(uTrans(i+1,j)-uTrans(i,j)) |
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& ) |
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ENDDO |
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ENDDO |
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#ifdef ALLOW_OBCS |
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C-- Apply open boundary conditions |
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IF (useOBCS) THEN |
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IF (tracerIdentity.EQ.GAD_TEMPERATURE) THEN |
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CALL OBCS_APPLY_TLOC( bi, bj, k, localTij, myThid ) |
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ELSEIF (tracerIdentity.EQ.GAD_SALINITY) THEN |
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CALL OBCS_APPLY_SLOC( bi, bj, k, localTij, myThid ) |
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END IF |
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END IF |
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#endif /* ALLOW_OBCS */ |
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C- Advective flux in Y |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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af(i,j) = 0. |
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ENDDO |
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ENDDO |
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IF (advectionScheme.EQ.ENUM_FLUX_LIMIT) THEN |
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CALL GAD_FLUXLIMIT_ADV_Y( |
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& bi,bj,k,deltaTtracer,vTrans,vVel,localTij,af,myThid) |
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ELSEIF (advectionScheme.EQ.ENUM_DST3 ) THEN |
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CALL GAD_DST3_ADV_Y( |
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& bi,bj,k,deltaTtracer,vTrans,vVel,localTij,af,myThid) |
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ELSEIF (advectionScheme.EQ.ENUM_DST3_FLUX_LIMIT ) THEN |
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CALL GAD_DST3FL_ADV_Y( |
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& bi,bj,k,deltaTtracer,vTrans,vVel,localTij,af,myThid) |
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ELSE |
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STOP 'GAD_ADVECTION: adv. scheme incompatibale with mutli-dim' |
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ENDIF |
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DO j=1-Oly,sNy+Oly-1 |
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DO i=1-Olx,sNx+Olx |
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localTij(i,j)=localTij(i,j)-deltaTtracer* |
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& _recip_hFacC(i,j,k,bi,bj)*recip_drF(k) |
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& *recip_rA(i,j,bi,bj) |
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& *( af(i,j+1)-af(i,j) |
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& -tracer(i,j,k,bi,bj)*(vTrans(i,j+1)-vTrans(i,j)) |
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& ) |
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ENDDO |
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ENDDO |
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#ifdef ALLOW_OBCS |
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C-- Apply open boundary conditions |
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IF (useOBCS) THEN |
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IF (tracerIdentity.EQ.GAD_TEMPERATURE) THEN |
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CALL OBCS_APPLY_TLOC( bi, bj, k, localTij, myThid ) |
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ELSEIF (tracerIdentity.EQ.GAD_SALINITY) THEN |
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CALL OBCS_APPLY_SLOC( bi, bj, k, localTij, myThid ) |
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END IF |
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END IF |
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#endif /* ALLOW_OBCS */ |
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DO j=1-Oly,sNy+Oly-1 |
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DO i=1-Olx,sNx+Olx |
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localTijk(i,j,k)=localTij(i,j) |
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ENDDO |
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ENDDO |
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C-- End of K loop for horizontal fluxes |
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ENDDO |
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C-- Start of k loop for vertical flux |
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DO k=Nr,1,-1 |
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C-- kup Cycles through 1,2 to point to w-layer above |
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C-- kDown Cycles through 2,1 to point to w-layer below |
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kup = 1+MOD(k+1,2) |
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kDown= 1+MOD(k,2) |
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C-- Get temporary terms used by tendency routines |
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CALL CALC_COMMON_FACTORS ( |
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I bi,bj,iMin,iMax,jMin,jMax,k, |
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O xA,yA,uTrans,vTrans,rTrans,maskUp, |
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I myThid) |
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C- Advective flux in R |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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af(i,j) = 0. |
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ENDDO |
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ENDDO |
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C Note: wVel needs to be masked |
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IF (K.GE.2) THEN |
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C- Compute vertical advective flux in the interior: |
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IF (advectionScheme.EQ.ENUM_FLUX_LIMIT) THEN |
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CALL GAD_FLUXLIMIT_ADV_R( |
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& bi,bj,k,deltaTtracer,rTrans,wVel,localTijk,af,myThid) |
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ELSEIF (advectionScheme.EQ.ENUM_DST3 ) THEN |
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adcroft |
1.2 |
CALL GAD_DST3_ADV_R( |
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& bi,bj,k,deltaTtracer,rTrans,wVel,localTijk,af,myThid) |
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adcroft |
1.1 |
ELSEIF (advectionScheme.EQ.ENUM_DST3_FLUX_LIMIT ) THEN |
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adcroft |
1.2 |
CALL GAD_DST3FL_ADV_R( |
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& bi,bj,k,deltaTtracer,rTrans,wVel,localTijk,af,myThid) |
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adcroft |
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ELSE |
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STOP 'GAD_ADVECTION: adv. scheme incompatibale with mutli-dim' |
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ENDIF |
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C- Surface "correction" term at k>1 : |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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af(i,j) = af(i,j) |
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& + (maskC(i,j,k,bi,bj)-maskC(i,j,k-1,bi,bj))* |
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& rTrans(i,j)*localTijk(i,j,k) |
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ENDDO |
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ENDDO |
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ELSE |
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C- Surface "correction" term at k=1 : |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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af(i,j) = rTrans(i,j)*localTijk(i,j,k) |
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ENDDO |
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ENDDO |
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ENDIF |
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C- add the advective flux to fVerT |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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fVerT(i,j,kUp) = af(i,j) |
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ENDDO |
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ENDDO |
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C-- Divergence of fluxes |
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kp1=min(Nr,k+1) |
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kp1Msk=1. |
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if (k.EQ.Nr) kp1Msk=0. |
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DO j=1-Oly,sNy+Oly |
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DO i=1-Olx,sNx+Olx |
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localTij(i,j)=localTijk(i,j,k)-deltaTtracer* |
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& _recip_hFacC(i,j,k,bi,bj)*recip_drF(k) |
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& *recip_rA(i,j,bi,bj) |
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& *( fVerT(i,j,kUp)-fVerT(i,j,kDown) |
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& -tracer(i,j,k,bi,bj)*rA(i,j,bi,bj)* |
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& (wVel(i,j,k,bi,bj)-kp1Msk*wVel(i,j,kp1,bi,bj)) |
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& )*rkFac |
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gTracer(i,j,k,bi,bj)= |
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& (localTij(i,j)-tracer(i,j,k,bi,bj))/deltaTtracer |
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ENDDO |
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ENDDO |
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C-- End of K loop for vertical flux |
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ENDDO |
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RETURN |
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END |
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