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dimitri |
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C $Header: /u/gcmpack/MITgcm/pkg/seaice/advect.F,v 1.10 2004/05/05 00:23:37 dimitri Exp $ |
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C $Name: $ |
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#include "SEAICE_OPTIONS.h" |
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CStartOfInterface |
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SUBROUTINE advect( UICE,VICE,HEFF,HEFFM,myThid ) |
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C /==========================================================\ |
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C | SUBROUTINE advect | |
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C | o Calculate ice advection | |
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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 "SEAICE_PARAMS.h" |
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#include "SEAICE_GRID.h" |
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#ifdef ALLOW_AUTODIFF_TAMC |
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# include "tamc.h" |
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#endif |
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C === Routine arguments === |
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C myThid - Thread no. that called this routine. |
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_RL UICE (1-OLx:sNx+OLx,1-OLy:sNy+OLy,3,nSx,nSy) |
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_RL VICE (1-OLx:sNx+OLx,1-OLy:sNy+OLy,3,nSx,nSy) |
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_RL HEFF (1-OLx:sNx+OLx,1-OLy:sNy+OLy,3,nSx,nSy) |
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_RL HEFFM (1-OLx:sNx+OLx,1-OLy:sNy+OLy, nSx,nSy) |
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INTEGER myThid |
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CEndOfInterface |
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#ifdef ALLOW_SEAICE |
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C === Local variables === |
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C i,j,k,bi,bj - Loop counters |
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INTEGER i, j, bi, bj |
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INTEGER K3 |
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_RL DELTT |
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_RL UI (1-OLx:sNx+OLx, 1-OLy:sNy+OLy,nSx,nSy) |
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_RL VI (1-OLx:sNx+OLx, 1-OLy:sNy+OLy,nSx,nSy) |
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_RL DIFFA(1-OLx:sNx+OLx, 1-OLy:sNy+OLy,nSx,nSy) |
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_RL mymin_R8, mymax_R8 |
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external mymin_R8, mymax_R8 |
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C NOW DECIDE IF BACKWARD EULER OR LEAPFROG |
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IF(LAD.EQ.1) THEN |
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C LEAPFROG |
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DELTT=SEAICE_deltaTtherm*TWO |
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K3=3 |
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ELSE |
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C BACKWARD EULER |
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DELTT=SEAICE_deltaTtherm |
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K3=2 |
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ENDIF |
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C NOW REARRANGE H'S |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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UI(I,J,bi,bj)=UICE(I,J,1,bi,bj) |
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VI(I,J,bi,bj)=VICE(I,J,1,bi,bj) |
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ENDDO |
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ENDDO |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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HEFF(I,J,3,bi,bj)=HEFF(I,J,2,bi,bj) |
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HEFF(I,J,2,bi,bj)=HEFF(I,J,1,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE heff = comlev1, key = ikey_dynamics |
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#endif /* ALLOW_AUTODIFF_TAMC */ |
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C NOW GO THROUGH STANDARD CONSERVATIVE ADVECTION |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO J=0,sNy-1 |
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DO I=0,sNx-1 |
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HEFF(I+1,J+1,1,bi,bj)=HEFF(I+1,J+1,K3,bi,bj) |
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& -DELTT*((HEFF(I+1,J+1,2,bi,bj)+HEFF |
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& (I+2,J+1,2,bi,bj))*(UI(I+2,J+2,bi,bj)+UI(I+2,J+1,bi,bj))- |
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& (HEFF(I+1,J+1,2,bi,bj)+HEFF |
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& (I,J+1,2,bi,bj))*(UI(I+1,J+2,bi,bj)+UI(I+1,J+1,bi,bj))) |
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& *(QUART/(DXTICE(I+1,J,bi,bj)*CSTICE(I,J+1,bi,bj))) |
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& -DELTT*((HEFF(I+1,J+1,2,bi,bj) |
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& +HEFF(I+1,J+2,2,bi,bj))*(VI(I+1,J+2,bi,bj) |
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& +VI(I+2,J+2,bi,bj))*CSUICE(I+1,J+2,bi,bj) |
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& -(HEFF(I+1,J+1,2,bi,bj)+HEFF(I+1,J,2,bi,bj)) |
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& *(VI(I+1,J+1,bi,bj)+VI(I+2,J+1,bi,bj))*CSUICE(I+1,J+1,bi,bj)) |
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& *(QUART/(DYTICE(I,J+1,bi,bj)*CSTICE(I,J+1,bi,bj))) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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_BARRIER |
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CALL SEAICE_EXCH ( HEFF, myThid ) |
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_BARRIER |
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IF (LAD .EQ. 2) THEN |
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C NOW DO BACKWARD EULER CORRECTION |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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HEFF(I,J,3,bi,bj)=HEFF(I,J,2,bi,bj) |
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HEFF(I,J,2,bi,bj)=HALF*(HEFF(I,J,1,bi,bj) |
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& +HEFF(I,J,2,bi,bj)) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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C NOW GO THROUGH STANDARD CONSERVATIVE ADVECTION |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO J=0,sNy-1 |
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DO I=0,sNx-1 |
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HEFF(I+1,J+1,1,bi,bj)=HEFF(I+1,J+1,3,bi,bj) |
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& -DELTT*((HEFF(I+1,J+1,2,bi,bj)+HEFF |
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& (I+2,J+1,2,bi,bj))*(UI(I+2,J+2,bi,bj)+UI(I+2,J+1,bi,bj))- |
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& (HEFF(I+1,J+1,2,bi,bj)+HEFF |
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& (I,J+1,2,bi,bj))*(UI(I+1,J+2,bi,bj)+UI(I+1,J+1,bi,bj))) |
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& *(QUART/(DXTICE(I+1,J,bi,bj)*CSTICE(I,J+1,bi,bj))) |
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& -DELTT*((HEFF(I+1,J+1,2,bi,bj) |
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& +HEFF(I+1,J+2,2,bi,bj))*(VI(I+1,J+2,bi,bj) |
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& +VI(I+2,J+2,bi,bj))*CSUICE(I+1,J+2,bi,bj) |
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& -(HEFF(I+1,J+1,2,bi,bj)+HEFF(I+1,J,2,bi,bj)) |
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& *(VI(I+1,J+1,bi,bj)+VI(I+2,J+1,bi,bj)) |
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& *CSUICE(I+1,J+1,bi,bj)) |
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& *(QUART/(DYTICE(I,J+1,bi,bj)*CSTICE(I,J+1,bi,bj))) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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_BARRIER |
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CALL SEAICE_EXCH( HEFF, myThid ) |
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_BARRIER |
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C NOW FIX UP H(I,J,2) |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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HEFF(I,J,2,bi,bj)=HEFF(I,J,3,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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C NOW DO DIFFUSION ON H(I,J,3) |
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C NOW CALCULATE DIFFUSION COEF ROUGHLY |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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DIFFA(I,J,bi,bj)=DIFF1*MYMIN_R8(DXTICE(I,J,bi,bj) |
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& *CSTICE(I,J,bi,bj),DYTICE(I,J,bi,bj)) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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CALL DIFFUS(HEFF,DIFFA,HEFFM,DELTT, myThid) |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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HEFF(I,J,1,bi,bj)=(HEFF(I,J,1,bi,bj)+HEFF(I,J,3,bi,bj)) |
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& *HEFFM(I,J,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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C NOW CALCULATE DIFFUSION COEF ROUGHLY |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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DIFFA(I,J,bi,bj)=-(MYMIN_R8(DXTICE(I,J,bi,bj)*CSTICE(I,J,bi,bj) |
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& ,DYTICE(I,J,bi,bj)))**2/DELTT |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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CALL DIFFUS(HEFF,DIFFA,HEFFM,DELTT, myThid) |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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HEFF(I,J,1,bi,bj)=(HEFF(I,J,1,bi,bj)+HEFF(I,J,3,bi,bj)) |
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& *HEFFM(I,J,bi,bj) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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#endif /* ALLOW_SEAICE */ |
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RETURN |
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END |
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