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module exner_milieu_m |
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IMPLICIT NONE |
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contains |
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SUBROUTINE exner_milieu ( ngrid, ps, p, pks, pk, pkf ) |
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! |
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! Auteurs : F. Forget , Y. Wanherdrick |
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! P.Le Van , Fr. Hourdin . |
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! .......... |
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! |
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! .... ngrid, ps,p sont des argum.d'entree au sous-prog ... |
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! .... pks,pk,pkf sont des argum.de sortie au sous-prog ... |
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! |
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! ************************************************************************ |
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! Calcule la fonction d'Exner pk = Cp * (p/preff) ** kappa , aux milieux des |
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! couches . Pk(l) sera calcule aux milieux des couches l ,entre les |
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! pressions p(l) et p(l+1) ,definis aux interfaces des llm couches . |
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! ************************************************************************ |
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! .. N.B : Au sommet de l'atmosphere, p(llm+1) = 0. , et ps et pks sont |
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! la pression et la fonction d'Exner au sol . |
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! |
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! WARNING : CECI est une version speciale de exner_hyb originale |
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! Utilise dans la version martienne pour pouvoir |
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! tourner avec des coordonnees verticales complexe |
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! => Il ne verifie PAS la condition la proportionalite en |
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! energie totale/ interne / potentielle (F.Forget 2001) |
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! ( voir note de Fr.Hourdin ) , |
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! |
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! |
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USE comconst_mod, ONLY: jmp1, cpp, kappa, r |
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USE comvert_mod, ONLY: preff |
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IMPLICIT NONE |
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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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INTEGER ngrid |
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REAL p(ngrid,llmp1),pk(ngrid,llm) |
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real, optional:: pkf(ngrid,llm) |
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REAL ps(ngrid),pks(ngrid) |
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! .... variables locales ... |
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INTEGER l, ij |
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REAL dum1 |
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logical,save :: firstcall=.true. |
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character(len=*),parameter :: modname="exner_milieu" |
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! Sanity check |
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if (firstcall) then |
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! sanity checks for Shallow Water case (1 vertical layer) |
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if (llm.eq.1) then |
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if (kappa.ne.1) then |
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call abort_gcm(modname, & |
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"kappa!=1 , but running in Shallow Water mode!!",42) |
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endif |
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if (cpp.ne.r) then |
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call abort_gcm(modname, & |
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"cpp!=r , but running in Shallow Water mode!!",42) |
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endif |
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endif ! of if (llm.eq.1) |
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firstcall=.false. |
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endif ! of if (firstcall) |
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! Specific behaviour for Shallow Water (1 vertical layer) case: |
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if (llm.eq.1) then |
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! Compute pks(:),pk(:),pkf(:) |
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DO ij = 1, ngrid |
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pks(ij) = (cpp/preff) * ps(ij) |
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pk(ij,1) = .5*pks(ij) |
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ENDDO |
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if (present(pkf)) then |
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pkf = pk |
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CALL filtreg ( pkf, jmp1, llm, 2, 1, .TRUE., 1 ) |
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end if |
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! our work is done, exit routine |
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return |
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endif ! of if (llm.eq.1) |
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! General case: |
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! ------------- |
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! Calcul de pks |
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! ------------- |
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DO ij = 1, ngrid |
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pks(ij) = cpp * ( ps(ij)/preff ) ** kappa |
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ENDDO |
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! .... Calcul de pk pour la couche l |
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! -------------------------------------------- |
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! |
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dum1 = cpp * (2*preff)**(-kappa) |
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DO l = 1, llm-1 |
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DO ij = 1, ngrid |
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pk(ij,l) = dum1 * (p(ij,l) + p(ij,l+1))**kappa |
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ENDDO |
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ENDDO |
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! .... Calcul de pk pour la couche l = llm .. |
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! (on met la meme distance (en log pression) entre Pk(llm) |
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! et Pk(llm -1) qu'entre Pk(llm-1) et Pk(llm-2) |
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DO ij = 1, ngrid |
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pk(ij,llm) = pk(ij,llm-1)**2 / pk(ij,llm-2) |
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ENDDO |
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if (present(pkf)) then |
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! calcul de pkf |
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pkf = pk |
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CALL filtreg ( pkf, jmp1, llm, 2, 1, .TRUE., 1 ) |
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end if |
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END SUBROUTINE exner_milieu |
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end module exner_milieu_m |
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