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SUBROUTINE tetalevel(ilon, ilev, lnew, pgcm, pres, qgcm, qpres) |
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USE dimens_m |
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USE paramet_m |
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USE dimphy |
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IMPLICIT NONE |
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! ================================================================ |
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! Interpoler des champs 3-D u, v et g du modele a un niveau de |
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! pression donnee (pres) |
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! INPUT: ilon ----- nombre de points |
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! ilev ----- nombre de couches |
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! lnew ----- true si on doit reinitialiser les poids |
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! pgcm ----- pressions modeles |
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! pres ----- pression vers laquelle on interpolle |
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! Qgcm ----- champ GCM |
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! Qpres ---- champ interpolle au niveau pres |
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! ================================================================ |
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! arguments : |
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! ----------- |
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INTEGER, intent(in):: ilon, ilev |
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LOGICAL lnew |
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REAL pgcm(ilon, ilev) |
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REAL, INTENT (IN) :: qgcm(ilon, ilev) |
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REAL, INTENT (IN) :: pres |
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REAL qpres(ilon) |
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! local : |
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! ------- |
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INTEGER lt(ip1jmp1), lb(ip1jmp1) |
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REAL ptop, pbot, aist(ip1jmp1), aisb(ip1jmp1) |
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SAVE lt, lb, ptop, pbot, aist, aisb |
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INTEGER i, k |
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! PRINT*,'tetalevel pres=',pres |
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! ===================================================================== |
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IF (lnew) THEN |
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! on réinitialise les réindicages et les poids |
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! ===================================================================== |
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! Chercher les 2 couches les plus proches du niveau a obtenir |
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! Eventuellement, faire l'extrapolation a partir des deux couches |
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! les plus basses ou les deux couches les plus hautes: |
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DO i = 1, ilon |
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IF (abs(pres-pgcm(i,ilev))>abs(pres-pgcm(i,1))) THEN |
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lt(i) = ilev ! 2 |
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lb(i) = ilev - 1 ! 1 |
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ELSE |
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lt(i) = 2 |
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lb(i) = 1 |
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END IF |
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END DO |
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DO k = 1, ilev - 1 |
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DO i = 1, ilon |
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pbot = pgcm(i, k) |
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ptop = pgcm(i, k+1) |
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! IM IF (ptop.LE.pres .AND. pbot.GE.pres) THEN |
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IF (ptop>=pres .AND. pbot<=pres) THEN |
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lt(i) = k + 1 |
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lb(i) = k |
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END IF |
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END DO |
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END DO |
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! Interpolation lineaire: |
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DO i = 1, ilon |
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! interpolation en logarithme de pression: |
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! ... Modif . P. Le Van ( 20/01/98) .... |
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! Modif Frédéric Hourdin (3/01/02) |
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! IF(pgcm(i,lb(i)).NE.0.OR. |
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! $ pgcm(i,lt(i)).NE.0.) THEN |
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! PRINT*,'i,lb,lt,2pgcm,pres',i,lb(i), |
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! . lt(i),pgcm(i,lb(i)),pgcm(i,lt(i)),pres |
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aist(i) = log(pgcm(i,lb(i))/pres)/log(pgcm(i,lb(i))/pgcm(i,lt(i))) |
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aisb(i) = log(pres/pgcm(i,lt(i)))/log(pgcm(i,lb(i))/pgcm(i,lt(i))) |
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END DO |
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END IF ! lnew |
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! ====================================================================== |
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! inteprollation |
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! ====================================================================== |
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DO i = 1, ilon |
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qpres(i) = qgcm(i, lb(i))*aisb(i) + qgcm(i, lt(i))*aist(i) |
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END DO |
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! Je mets les vents a zero quand je rencontre une montagne |
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DO i = 1, ilon |
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! IM if (pgcm(i,1).LT.pres) THEN |
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IF (pgcm(i,1)>pres) THEN |
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! Qpres(i)=1e33 |
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qpres(i) = 1E+20 |
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! IM PRINT*,'i,pgcm(i,1),pres =',i,pgcm(i,1),pres |
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END IF |
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END DO |
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RETURN |
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END SUBROUTINE tetalevel |
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