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mlosch |
1.2 |
C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_diffusion.F,v 1.1 2006/02/16 10:41:48 mlosch Exp $ |
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mlosch |
1.1 |
C $Name: $ |
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#include "SEAICE_OPTIONS.h" |
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CStartOfInterface |
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SUBROUTINE SEAICE_DIFFUSION( |
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U HEFF, |
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I HEFFM, DELTT, myTime, myIter, 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 "GRID.h" |
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#include "SEAICE_PARAMS.h" |
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CML#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 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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_RL DELTT |
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_RL myTime |
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INTEGER myIter |
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INTEGER myThid |
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CEndOfInterface |
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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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_RL DIFFA(1-OLx:sNx+OLx, 1-OLy:sNy+OLy,nSx,nSy) |
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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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mlosch |
1.2 |
C-- This would be the natural way to do diffusion (explicitly) |
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C For now we stick to the modified Eulerian time step |
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CML DO bj=myByLo(myThid),myByHi(myThid) |
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CML DO bi=myBxLo(myThid),myBxHi(myThid) |
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CML CALL GAD_DIFF_X(bi,bj,k,xA,diff1,localT,df,myThid) |
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CML DO j=1-Oly,sNy+Oly |
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CML DO i=1-Olx,sNx+Olx |
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CML fZon(i,j) = fZon(i,j) + df(i,j) |
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CML ENDDO |
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CML ENDDO |
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CML CALL GAD_DIFF_Y(bi,bj,k,yA,diff1,localT,df,myThid) |
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CML DO j=1-Oly,sNy+Oly |
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CML DO i=1-Olx,sNx+Olx |
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CML fMer(i,j) = fMer(i,j) + df(i,j) |
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CML ENDDO |
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CML ENDDO |
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CMLC-- Divergence of fluxes: update scalar field |
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CML DO j=1-Oly,sNy+Oly-1 |
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CML DO i=1-Olx,sNx+Olx-1 |
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CML HEFF(i,j,1,bi,bj)=HEFF(i,j,1,bi,bj) + DELTT * |
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CML & maskC(i,j,kSurface,bi,bj)*recip_rA(i,j,bi,bj) |
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CML & *( (fZon(i+1,j)-fZon(i,j)) |
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CML & +(fMer(i,j+1)-fMer(i,j)) |
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CML & ) |
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CML & ) |
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CML ENDDO |
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CML ENDDO |
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CML ENDDO |
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CML ENDDO |
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mlosch |
1.1 |
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)= |
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& DIFF1*MIN( _dxF(I,J,bi,bj), _dyF(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)= |
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& -(MIN( _dxF(I,J,bi,bj), _dyF(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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RETURN |
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END |
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