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C $Header: /u/gcmpack/MITgcm/pkg/generic_advdiff/gad_exch_som.F,v 1.2 2008/02/08 17:16:15 jmc Exp $ |
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C $Name: $ |
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#include "GAD_OPTIONS.h" |
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CBOP |
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C !ROUTINE: GAD_SOM_PREP_CS_CORNER |
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C !INTERFACE: |
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SUBROUTINE GAD_SOM_PREP_CS_CORNER( |
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U smVol, smTr0, smTr, smCorners, |
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I prep4dirX, overlapOnly, interiorOnly, |
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I N_edge, S_edge, E_edge, W_edge, |
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I iPass, k, myNz, bi, bj, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | SUBROUTINE GAD_SOM_PREP_CS_CORNER |
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C | o Prepare for Horizontal SOM Advection : |
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C | when using Cubed-Sphere Grid, fill corner-halo regions |
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C | of all Tracer-moments with proper values |
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C *==========================================================* |
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C \ev |
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C !USES: |
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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 "GAD.h" |
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C !INPUT/OUTPUT PARAMETERS: |
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C === Routine arguments === |
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C smVol :: grid-cell volume |
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C smTr0 :: tracer Zero Order moment |
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C smTr :: tracer 1rst & 2nd Order moments |
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C smCorners :: Temporary storage of Corner-halo-regions values |
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C ( 3rd dim = Number of corners = 4 : SW, SE, NE, NW ) |
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C prep4dirX :: True = prepare for X direction advection |
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C otherwise, prepare for Y direction advection. |
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C overlapOnly :: only update the edges of myTile, but not the interior |
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C interiorOnly :: only update the interior of myTile, but not the edges |
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C [N,S,E,W]_edge :: true if N,S,E,W edge of myTile is an Edge of the cube |
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C iPass :: current passage index in SOM_ADVECT |
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C k :: current level index |
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C myNz :: 3rd dimension of array to exchange |
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C bi,bj :: current tile indices |
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C myThid :: my Thread Id number |
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INTEGER myNz |
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_RL smVol(1-OLx:sNx+OLx,1-OLy:sNy+OLy,myNz) |
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_RL smTr0(1-OLx:sNx+OLx,1-OLy:sNy+OLy,myNz) |
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_RL smTr (1-OLx:sNx+OLx,1-OLy:sNy+OLy,myNz,nSx,nSy,nSOM) |
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_RL smCorners(OLx,OLy,4,-1:nSOM) |
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LOGICAL prep4dirX, overlapOnly, interiorOnly |
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LOGICAL N_edge, S_edge, E_edge, W_edge |
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INTEGER iPass, k, bi, bj |
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INTEGER myThid |
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CEOP |
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#ifdef GAD_ALLOW_SOM_ADVECT |
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C !LOCAL VARIABLES: |
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C === Local variables === |
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INTEGER i,j, jPass, n |
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LOGICAL southWestCorner |
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LOGICAL southEastCorner |
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LOGICAL northEastCorner |
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LOGICAL northWestCorner |
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southWestCorner = S_edge .AND. W_edge |
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southEastCorner = S_edge .AND. E_edge |
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northEastCorner = N_edge .AND. E_edge |
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northWestCorner = N_edge .AND. W_edge |
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IF ( overlapOnly ) THEN |
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C-- to avoid repeating 2 times the full sequence of FILL_CS_CORNER calls, |
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C add a loop on jPass (from iPass to 2) to reproduce the following logic: |
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C 1 ) overlapOnly & iPass = 1 (face 3 & 6) |
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C - fill corners for the other direction |
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C - then store the corner values |
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C 2 ) IF overlapOnly :: fill corners for the current direction |
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C ELSEIF .NOT.interiorOnly :: get the corner values back from storage |
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C ENDIF |
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DO jPass = iPass,2 |
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IF ( ( jPass.EQ.2 .AND. prep4dirX ) .OR. |
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& ( jPass.EQ.1 .AND. .NOT.prep4dirX ) ) THEN |
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C-- Fill corners to prepare for calculations in X |
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CALL GAD_SOM_FILL_CS_CORNER( .TRUE., |
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U smVol(1-OLx,1-OLy,k), |
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U smTr0(1-OLx,1-OLy,k), |
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U smTr(1-OLx,1-OLy,k,bi,bj,1), |
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U smTr(1-OLx,1-OLy,k,bi,bj,2), |
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U smTr(1-OLx,1-OLy,k,bi,bj,3), |
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U smTr(1-OLx,1-OLy,k,bi,bj,4), |
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U smTr(1-OLx,1-OLy,k,bi,bj,5), |
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U smTr(1-OLx,1-OLy,k,bi,bj,6), |
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U smTr(1-OLx,1-OLy,k,bi,bj,7), |
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U smTr(1-OLx,1-OLy,k,bi,bj,8), |
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U smTr(1-OLx,1-OLy,k,bi,bj,9), |
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I bi, bj, myThid ) |
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C-- End of filling for X dir |
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c ENDIF |
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ELSE |
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C Note: the 2 IF tests are equivalent to just 1 if/else test; |
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C use this later option and leave the former commented. |
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c IF ( ( jPass.EQ.1 .AND. prep4dirX ) .OR. |
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c & ( jPass.EQ.2 .AND. .NOT.prep4dirX ) ) THEN |
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C-- Fill corners to prepare for calculations in Y |
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CALL GAD_SOM_FILL_CS_CORNER( .FALSE., |
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U smVol(1-OLx,1-OLy,k), |
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U smTr0(1-OLx,1-OLy,k), |
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U smTr(1-OLx,1-OLy,k,bi,bj,1), |
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U smTr(1-OLx,1-OLy,k,bi,bj,2), |
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U smTr(1-OLx,1-OLy,k,bi,bj,3), |
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U smTr(1-OLx,1-OLy,k,bi,bj,4), |
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U smTr(1-OLx,1-OLy,k,bi,bj,5), |
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U smTr(1-OLx,1-OLy,k,bi,bj,6), |
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U smTr(1-OLx,1-OLy,k,bi,bj,7), |
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U smTr(1-OLx,1-OLy,k,bi,bj,8), |
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U smTr(1-OLx,1-OLy,k,bi,bj,9), |
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I bi, bj, myThid ) |
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C-- End of filling for Y dir |
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ENDIF |
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IF ( jPass.EQ.1 ) THEN |
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C-- Store corner values (to be used on the next iPass) |
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IF ( southWestCorner ) THEN |
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DO j=1,OLy |
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DO i=1,OLx |
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smCorners(i,j,1,-1) = smVol(i-OLx,j-OLy,k) |
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smCorners(i,j,1, 0) = smTr0(i-OLx,j-OLy,k) |
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DO n=1,nSOM |
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smCorners(i,j,1,n) = smTr (i-OLx,j-OLy,k,bi,bj,n) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( southEastCorner ) THEN |
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DO j=1,OLy |
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DO i=1,OLx |
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smCorners(i,j,2,-1) = smVol(sNx+i,j-OLy,k) |
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smCorners(i,j,2, 0) = smTr0(sNx+i,j-OLy,k) |
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DO n=1,nSOM |
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smCorners(i,j,2,n) = smTr (sNx+i,j-OLy,k,bi,bj,n) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( northEastCorner ) THEN |
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DO j=1,OLy |
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DO i=1,OLx |
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smCorners(i,j,3,-1) = smVol(sNx+i,sNy+j,k) |
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smCorners(i,j,3, 0) = smTr0(sNx+i,sNy+j,k) |
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DO n=1,nSOM |
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smCorners(i,j,3,n) = smTr (sNx+i,sNy+j,k,bi,bj,n) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( northWestCorner ) THEN |
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DO j=1,OLy |
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DO i=1,OLx |
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smCorners(i,j,4,-1) = smVol(i-OLx,sNy+j,k) |
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smCorners(i,j,4, 0) = smTr0(i-OLx,sNy+j,k) |
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DO n=1,nSOM |
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smCorners(i,j,4,n) = smTr (i-OLx,sNy+j,k,bi,bj,n) |
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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-- End storing block |
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ENDIF |
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C-- End of loop on jPass |
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ENDDO |
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ELSEIF ( .NOT.interiorOnly ) THEN |
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C-- Get back corner values from storage |
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IF ( southWestCorner ) THEN |
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DO j=1,OLy |
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DO i=1,OLx |
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smVol(i-OLx,j-OLy,k ) = smCorners(i,j,1,-1) |
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smTr0(i-OLx,j-OLy,k ) = smCorners(i,j,1, 0) |
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DO n=1,nSOM |
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smTr(i-OLx,j-OLy,k,bi,bj,n) = smCorners(i,j,1, n) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( southEastCorner ) THEN |
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DO j=1,OLy |
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DO i=1,OLx |
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smVol(sNx+i,j-OLy,k ) = smCorners(i,j,2,-1) |
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smTr0(sNx+i,j-OLy,k ) = smCorners(i,j,2, 0) |
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DO n=1,nSOM |
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smTr(sNx+i,j-OLy,k,bi,bj,n) = smCorners(i,j,2, n) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( northEastCorner ) THEN |
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DO j=1,OLy |
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DO i=1,OLx |
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smVol(sNx+i,sNy+j,k ) = smCorners(i,j,3,-1) |
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smTr0(sNx+i,sNy+j,k ) = smCorners(i,j,3, 0) |
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DO n=1,nSOM |
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smTr(sNx+i,sNy+j,k,bi,bj,n) = smCorners(i,j,3, n) |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( northWestCorner ) THEN |
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DO j=1,OLy |
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DO i=1,OLx |
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smVol(i-OLx,sNy+j,k ) = smCorners(i,j,4,-1) |
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smTr0(i-OLx,sNy+j,k ) = smCorners(i,j,4, 0) |
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DO n=1,nSOM |
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smTr(i-OLx,sNy+j,k,bi,bj,n) = smCorners(i,j,4, n) |
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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-- End getting back corner values from storage |
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C--- End if/else - overlapOnly - block |
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ENDIF |
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#endif /* GAD_ALLOW_SOM_ADVECT */ |
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RETURN |
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END |
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