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! $Header$ |
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! |
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SUBROUTINE diverg(klevel,x,y,div) |
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c P. Le Van |
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c |
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c ********************************************************************* |
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c ... calcule la divergence a tous les niveaux d'1 vecteur de compos. |
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c x et y... |
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c x et y etant des composantes covariantes ... |
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c ********************************************************************* |
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IMPLICIT NONE |
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c |
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c x et y sont des arguments d'entree pour le s-prog |
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c div est un argument de sortie pour le s-prog |
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c |
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c |
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c --------------------------------------------------------------------- |
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c |
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c ATTENTION : pendant ce s-pg , ne pas toucher au COMMON/scratch/ . |
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c |
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c --------------------------------------------------------------------- |
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INCLUDE "dimensions.h" |
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INCLUDE "paramet.h" |
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INCLUDE "comgeom.h" |
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c |
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c .......... variables en arguments ................... |
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c |
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INTEGER klevel |
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REAL x( ip1jmp1,klevel ),y( ip1jm,klevel ),div( ip1jmp1,klevel ) |
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INTEGER l,ij |
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c |
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c ............... variables locales ......................... |
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REAL aiy1( iip1 ) , aiy2( iip1 ) |
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REAL sumypn,sumyps |
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c ................................................................... |
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c |
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REAL SSUM |
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c |
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c |
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DO 10 l = 1,klevel |
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c |
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DO ij = iip2, ip1jm - 1 |
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div( ij + 1, l ) = |
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* cvusurcu( ij+1 ) * x( ij+1,l ) - cvusurcu( ij ) * x( ij , l) + |
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* cuvsurcv(ij-iim) * y(ij-iim,l) - cuvsurcv(ij+1) * y(ij+1,l) |
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ENDDO |
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c |
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c .... correction pour div( 1,j,l) ...... |
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c .... div(1,j,l)= div(iip1,j,l) .... |
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c |
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CDIR$ IVDEP |
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DO ij = iip2,ip1jm,iip1 |
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div( ij,l ) = div( ij + iim,l ) |
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ENDDO |
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c |
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c .... calcul aux poles ..... |
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c |
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DO ij = 1,iim |
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aiy1(ij) = cuvsurcv( ij ) * y( ij , l ) |
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aiy2(ij) = cuvsurcv( ij+ ip1jmi1 ) * y( ij+ ip1jmi1, l ) |
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ENDDO |
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sumypn = SSUM ( iim,aiy1,1 ) / apoln |
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sumyps = SSUM ( iim,aiy2,1 ) / apols |
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c |
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DO ij = 1,iip1 |
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div( ij , l ) = - sumypn |
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div( ij + ip1jm, l ) = sumyps |
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ENDDO |
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10 CONTINUE |
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c |
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ccc CALL filtreg( div, jjp1, klevel, 2, 2, .TRUE., 1 ) |
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c |
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DO l = 1, klevel |
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DO ij = iip2,ip1jm |
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div(ij,l) = div(ij,l) * unsaire(ij) |
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ENDDO |
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ENDDO |
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c |
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RETURN |
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END |