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! $Header: /home/cvsroot/LMDZ4/libf/dyn3d/limy.F,v 1.1.1.1 2004/05/19 12:53:07 lmdzadmin Exp $ |
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SUBROUTINE limy(s0,sy,sm,pente_max) |
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c |
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c Auteurs: P.Le Van, F.Hourdin, F.Forget |
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c |
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c ******************************************************************** |
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c Shema d'advection " pseudo amont " . |
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c ******************************************************************** |
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c q,w sont des arguments d'entree pour le s-pg .... |
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c dq sont des arguments de sortie pour le s-pg .... |
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c |
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c |
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c -------------------------------------------------------------------- |
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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 comvert |
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use logic |
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use comgeom |
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guez |
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USE nr_util, ONLY : pi |
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guez |
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IMPLICIT NONE |
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c |
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c |
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c |
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c Arguments: |
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c ---------- |
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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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c |
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c Local |
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c --------- |
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c |
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INTEGER i,ij,l |
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c |
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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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c |
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c |
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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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enddo |
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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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endif |
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c |
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do l = 1, llm |
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c |
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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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ENDDO |
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c |
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c -------------------------------- |
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c CALCUL EN LATITUDE |
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c -------------------------------- |
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c On commence par calculer la valeur du traceur moyenne sur le premier cercle |
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c de latitude autour du pole (qpns pour le pole nord et qpsn pour |
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c 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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ENDDO |
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qpns = SSUM( iim, airescb ,1 ) / airej2 |
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qpsn = SSUM( iim, airesch ,1 ) / airejjm |
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c 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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ENDDO |
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c 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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enddo |
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c calcul des pentes aux poles |
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c calcul des pentes limites aux poles |
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c cas ou on a un extremum au pole |
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c if(dyqv(ismin(iim,dyqv,1))*dyqv(ismax(iim,dyqv,1)).le.0.) |
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c & apn=0. |
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c if(dyqv(ismax(iim,dyqv(ip1jm-iip1+1),1)+ip1jm-iip1+1)* |
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c & dyqv(ismin(iim,dyqv(ip1jm-iip1+1),1)+ip1jm-iip1+1).le.0.) |
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c & aps=0. |
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c limitation des pentes aux poles |
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c do ij=1,iip1 |
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c dyq(ij)=apn*dyq(ij) |
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c dyq(ip1jm+ij)=aps*dyq(ip1jm+ij) |
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c enddo |
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c test |
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c do ij=1,iip1 |
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c dyq(iip1+ij)=0. |
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c dyq(ip1jm+ij-iip1)=0. |
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c enddo |
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c do ij=1,ip1jmp1 |
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c dyq(ij)=dyq(ij)*cos(rlatu((ij-1)/iip1+1)) |
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c enddo |
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if(dyqv(ismin(iim,dyqv,1))*dyqv(ismax(iim,dyqv,1)).le.0.) |
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& then |
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do ij=1,iip1 |
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dyqmax(ij)=0. |
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enddo |
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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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enddo |
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endif |
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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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&then |
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do ij=ip1jm+1,ip1jmp1 |
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dyqmax(ij)=0. |
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enddo |
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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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enddo |
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endif |
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c calcul des pentes limitees |
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do ij=1,ip1jmp1 |
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if(dyqv(ij)*dyqv(ij-iip1).gt.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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endif |
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enddo |
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DO ij=1,ip1jmp1 |
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sy(ij,l) = dyq(ij) * sm ( ij,l ) |
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ENDDO |
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enddo ! fin de la boucle sur les couches verticales |
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RETURN |
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END |
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