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! $Header: /home/cvsroot/LMDZ4/libf/dyn3d/limy.F,v 1.1.1.1 2004/05/19 |
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! 12:53:07 lmdzadmin Exp $ |
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SUBROUTINE limy(s0, sy, sm, pente_max) |
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! Auteurs: P.Le Van, F.Hourdin, F.Forget |
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! ******************************************************************** |
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! Shema d'advection " pseudo amont " . |
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! ******************************************************************** |
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! q,w sont des arguments d'entree pour le s-pg .... |
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! dq sont des arguments de sortie pour le s-pg .... |
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! -------------------------------------------------------------------- |
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USE dimens_m |
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USE paramet_m |
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USE comconst |
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USE disvert_m |
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USE conf_gcm_m |
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USE comgeom |
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USE nr_util, ONLY: pi |
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IMPLICIT NONE |
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! Arguments: |
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! ---------- |
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REAL pente_max |
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REAL s0(ip1jmp1, llm), sy(ip1jmp1, llm), sm(ip1jmp1, llm) |
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! Local |
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! --------- |
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INTEGER i, ij, l |
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REAL q(ip1jmp1, llm) |
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REAL airej2, airejjm, airescb(iim), airesch(iim) |
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REAL sigv, dyq(ip1jmp1), dyqv(ip1jm) |
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REAL adyqv(ip1jm), dyqmax(ip1jmp1) |
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REAL qbyv(ip1jm, llm) |
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REAL qpns, qpsn, apn, aps, dyn1, dys1, dyn2, dys2 |
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LOGICAL extremum, first |
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SAVE first |
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REAL convpn, convps, convmpn, convmps |
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REAL sinlon(iip1), sinlondlon(iip1) |
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REAL coslon(iip1), coslondlon(iip1) |
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SAVE sinlon, coslon, sinlondlon, coslondlon |
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REAL ssum |
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INTEGER ismax, ismin |
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EXTERNAL ssum, convflu, ismin, ismax |
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DATA first/.TRUE./ |
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IF (first) THEN |
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PRINT *, 'SCHEMA AMONT NOUVEAU' |
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first = .FALSE. |
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DO i = 2, iip1 |
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coslon(i) = cos(rlonv(i)) |
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sinlon(i) = sin(rlonv(i)) |
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coslondlon(i) = coslon(i)*(rlonu(i)-rlonu(i-1))/pi |
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sinlondlon(i) = sinlon(i)*(rlonu(i)-rlonu(i-1))/pi |
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END DO |
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coslon(1) = coslon(iip1) |
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coslondlon(1) = coslondlon(iip1) |
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sinlon(1) = sinlon(iip1) |
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sinlondlon(1) = sinlondlon(iip1) |
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END IF |
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DO l = 1, llm |
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DO ij = 1, ip1jmp1 |
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q(ij, l) = s0(ij, l)/sm(ij, l) |
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dyq(ij) = sy(ij, l)/sm(ij, l) |
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END DO |
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! -------------------------------- |
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! CALCUL EN LATITUDE |
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! -------------------------------- |
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! On commence par calculer la valeur du traceur moyenne sur le premier |
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! cercle |
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! de latitude autour du pole (qpns pour le pole nord et qpsn pour |
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! le pole nord) qui sera utilisee pour evaluer les pentes au pole. |
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airej2 = ssum(iim, aire(iip2), 1) |
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airejjm = ssum(iim, aire(ip1jm-iim), 1) |
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DO i = 1, iim |
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airescb(i) = aire(i+iip1)*q(i+iip1, l) |
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airesch(i) = aire(i+ip1jm-iip1)*q(i+ip1jm-iip1, l) |
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END DO |
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qpns = ssum(iim, airescb, 1)/airej2 |
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qpsn = ssum(iim, airesch, 1)/airejjm |
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! calcul des pentes aux points v |
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DO ij = 1, ip1jm |
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dyqv(ij) = q(ij, l) - q(ij+iip1, l) |
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adyqv(ij) = abs(dyqv(ij)) |
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END DO |
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! calcul des pentes aux points scalaires |
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DO ij = iip2, ip1jm |
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dyqmax(ij) = min(adyqv(ij-iip1), adyqv(ij)) |
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dyqmax(ij) = pente_max*dyqmax(ij) |
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END DO |
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! calcul des pentes aux poles |
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! calcul des pentes limites aux poles |
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! cas ou on a un extremum au pole |
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! if(dyqv(ismin(iim,dyqv,1))*dyqv(ismax(iim,dyqv,1)).le.0.) |
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! & apn=0. |
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! if(dyqv(ismax(iim,dyqv(ip1jm-iip1+1),1)+ip1jm-iip1+1)* |
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! & dyqv(ismin(iim,dyqv(ip1jm-iip1+1),1)+ip1jm-iip1+1).le.0.) |
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! & aps=0. |
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! limitation des pentes aux poles |
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! do ij=1,iip1 |
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! dyq(ij)=apn*dyq(ij) |
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! dyq(ip1jm+ij)=aps*dyq(ip1jm+ij) |
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! enddo |
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! test |
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! do ij=1,iip1 |
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! dyq(iip1+ij)=0. |
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! dyq(ip1jm+ij-iip1)=0. |
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! enddo |
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! do ij=1,ip1jmp1 |
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! dyq(ij)=dyq(ij)*cos(rlatu((ij-1)/iip1+1)) |
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! enddo |
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IF (dyqv(ismin(iim,dyqv,1))*dyqv(ismax(iim,dyqv,1))<=0.) THEN |
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DO ij = 1, iip1 |
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dyqmax(ij) = 0. |
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END DO |
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ELSE |
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DO ij = 1, iip1 |
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dyqmax(ij) = pente_max*abs(dyqv(ij)) |
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END DO |
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END IF |
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IF (dyqv(ismax(iim,dyqv(ip1jm-iip1+1),1)+ip1jm-iip1+1)*dyqv(ismin(iim, & |
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dyqv(ip1jm-iip1+1),1)+ip1jm-iip1+1)<=0.) THEN |
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DO ij = ip1jm + 1, ip1jmp1 |
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dyqmax(ij) = 0. |
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END DO |
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ELSE |
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DO ij = ip1jm + 1, ip1jmp1 |
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dyqmax(ij) = pente_max*abs(dyqv(ij-iip1)) |
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END DO |
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END IF |
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! calcul des pentes limitees |
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DO ij = 1, ip1jmp1 |
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IF (dyqv(ij)*dyqv(ij-iip1)>0.) THEN |
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dyq(ij) = sign(min(abs(dyq(ij)),dyqmax(ij)), dyq(ij)) |
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ELSE |
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dyq(ij) = 0. |
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END IF |
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END DO |
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DO ij = 1, ip1jmp1 |
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sy(ij, l) = dyq(ij)*sm(ij, l) |
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END DO |
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END DO ! fin de la boucle sur les couches verticales |
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RETURN |
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END SUBROUTINE limy |
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