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C $Header: /u/gcmpack/MITgcm/pkg/obcs/obcs_check_depths.F,v 1.2 2011/05/24 14:31:14 jmc Exp $ |
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C $Name: $ |
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#include "OBCS_OPTIONS.h" |
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SUBROUTINE OBCS_CHECK_DEPTHS( myThid ) |
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C *==========================================================* |
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C | SUBROUTINE OBCS_CHECK_DEPTHS |
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C | o Check for non-zero normal gradient across open |
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C | boundaries |
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C | o fix them if required and print a message |
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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 "OBCS_PARAMS.h" |
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#include "OBCS_GRID.h" |
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C === Routine arguments === |
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C myThid :: my Thread Id number |
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INTEGER myThid |
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#ifdef ALLOW_OBCS |
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C === Local variables === |
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C msgBuf :: Informational/error message buffer |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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INTEGER bi, bj, I, J, K, ichanged |
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IF ( OBCSfixTopo ) THEN |
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C-- Modify topography to ensure that outward d(topography)/dn >= 0, |
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C topography at open boundary points must be equal or shallower than |
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C topography one grid-point inward from open boundary |
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ichanged = 0 |
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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 K=1,Nr |
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#ifdef ALLOW_OBCS_NORTH |
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DO I=1,sNx |
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J=OB_Jn(I,bi,bj) |
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IF ( J .NE. 0 .AND. |
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& ( R_low(I,J,bi,bj) .LT. R_low(I,J-1,bi,bj) ) ) THEN |
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ichanged = ichanged + 1 |
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R_low(I,J,bi,bj) = R_low(I,J-1,bi,bj) |
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WRITE(msgBuf,'(2A,(1X,4I6))') |
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& 'S/R OBCS_CHECK_DEPTHS: fixed topography at ', |
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& '(i,j,bi,bj) = ', I, J, bi, bj |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid) |
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ENDIF |
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ENDDO |
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#endif |
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#ifdef ALLOW_OBCS_SOUTH |
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DO I=1,sNx |
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J=OB_Js(I,bi,bj) |
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IF ( J .NE. 0 .AND. |
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& ( R_low(I,J,bi,bj) .LT. R_low(I,J+1,bi,bj) ) ) THEN |
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ichanged = ichanged + 1 |
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R_low(I,J,bi,bj) = R_low(I,J+1,bi,bj) |
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WRITE(msgBuf,'(2A,(1X,4I6))') |
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& 'S/R OBCS_CHECK_DEPTHS: fixed topography at ', |
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& '(i,j,bi,bj) = ', I, J, bi, bj |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid) |
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ENDIF |
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ENDDO |
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#endif |
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#ifdef ALLOW_OBCS_EAST |
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DO J=1,sNy |
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I = OB_Ie(J,bi,bj) |
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IF ( I .NE. 0 .AND. |
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& ( R_low(I,J,bi,bj) .LT. R_low(I-1,J,bi,bj) ) ) THEN |
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ichanged = ichanged + 1 |
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R_low(I,J,bi,bj) = R_low(I-1,J,bi,bj) |
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WRITE(msgBuf,'(2A,(1X,4I6))') |
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& 'S/R OBCS_CHECK_DEPTHS: fixed topography at ', |
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& '(i,j,bi,bj) = ', I, J, bi, bj |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid) |
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ENDIF |
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ENDDO |
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#endif |
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C Western boundary |
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#ifdef ALLOW_OBCS_WEST |
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DO J=1,sNy |
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I = OB_Iw(J,bi,bj) |
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IF ( I .NE. 0 .AND. |
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& ( R_low(I,J,bi,bj) .LT. R_low(I+1,J,bi,bj) ) ) THEN |
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ichanged = ichanged + 1 |
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R_low(I,J,bi,bj) = R_low(I+1,J,bi,bj) |
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WRITE(msgBuf,'(2A,(1X,4I6))') |
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& 'S/R OBCS_CHECK_DEPTHS: fixed topography at ', |
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& '(i,j,bi,bj) = ', I, J, bi, bj |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid) |
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ENDIF |
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ENDDO |
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#endif |
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ENDDO |
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ENDDO |
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ENDDO |
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C-- some diagnostics to stdout |
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CALL GLOBAL_SUM_INT( ichanged, myThid ) |
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IF ( ichanged .GT. 0 ) THEN |
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WRITE(msgBuf,'(A,I7,A,A)') |
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& 'OBCS message: corrected ', ichanged, |
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& ' instances of problematic topography gradients', |
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& ' normal to open boundaries' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT, myThid) |
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ENDIF |
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C endif (OBCSfixTopo) |
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ENDIF |
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#endif /* ALLOW_OBCS */ |
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RETURN |
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END |
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