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! $Header: /home/cvsroot/LMDZ4/libf/phylmd/stdlevvar.F90,v 1.3 2005/05/25 13:10:09 fairhead Exp $ |
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SUBROUTINE stdlevvar(klon, knon, nsrf, zxli, & |
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u1, v1, t1, q1, z1, & |
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ts1, qsurf, rugos, psol, pat1, & |
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t_2m, q_2m, t_10m, q_10m, u_10m, ustar) |
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use YOMCST |
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use yoethf |
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IMPLICIT NONE |
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!------------------------------------------------------------------------- |
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! |
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! Objet : calcul de la temperature et l'humidite relative a 2m et du |
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! module du vent a 10m a partir des relations de Dyer-Businger et |
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! des equations de Louis. |
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! |
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! Reference : Hess, Colman et McAvaney (1995) |
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! |
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! I. Musat, 01.07.2002 |
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! |
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!AM On rajoute en sortie t et q a 10m pr le calcule d'hbtm2 dans clmain |
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! |
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!------------------------------------------------------------------------- |
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! |
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! klon----input-I- dimension de la grille physique (= nb_pts_latitude X nb_pts_longitude) |
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! knon----input-I- nombre de points pour un type de surface |
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! nsrf----input-I- indice pour le type de surface; voir indicesol.inc |
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! zxli----input-L- TRUE si calcul des cdrags selon Laurent Li |
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! u1------input-R- vent zonal au 1er niveau du modele |
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! v1------input-R- vent meridien au 1er niveau du modele |
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! t1------input-R- temperature de l'air au 1er niveau du modele |
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! q1------input-R- humidite relative au 1er niveau du modele |
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! z1------input-R- geopotentiel au 1er niveau du modele |
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! ts1-----input-R- temperature de l'air a la surface |
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! qsurf---input-R- humidite relative a la surface |
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! rugos---input-R- rugosite |
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! psol----input-R- pression au sol |
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! pat1----input-R- pression au 1er niveau du modele |
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! |
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! t_2m---output-R- temperature de l'air a 2m |
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! q_2m---output-R- humidite relative a 2m |
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! u_10m--output-R- vitesse du vent a 10m |
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!AM |
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! t_10m--output-R- temperature de l'air a 10m |
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! q_10m--output-R- humidite specifique a 10m |
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! ustar--output-R- u* |
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! |
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INTEGER, intent(in) :: klon, knon, nsrf |
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LOGICAL, intent(in) :: zxli |
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REAL, dimension(klon), intent(in) :: u1, v1, t1, q1, z1, ts1 |
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REAL, dimension(klon), intent(in) :: qsurf, rugos |
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REAL, dimension(klon), intent(in) :: psol, pat1 |
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! |
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REAL, dimension(klon), intent(out) :: t_2m, q_2m, ustar |
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REAL, dimension(klon), intent(out) :: u_10m, t_10m, q_10m |
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!------------------------------------------------------------------------- |
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!IM PLUS |
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! |
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! Quelques constantes et options: |
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! |
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! RKAR : constante de von Karman |
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REAL, PARAMETER :: RKAR=0.40 |
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! niter : nombre iterations calcul "corrector" |
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! INTEGER, parameter :: niter=6, ncon=niter-1 |
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INTEGER, parameter :: niter=2, ncon=niter-1 |
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! |
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! Variables locales |
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INTEGER :: i, n |
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REAL :: zref |
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REAL, dimension(klon) :: speed |
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! tpot : temperature potentielle |
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REAL, dimension(klon) :: tpot |
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REAL, dimension(klon) :: zri1, cdran |
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REAL, dimension(klon) :: cdram, cdrah |
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! ri1 : nb. de Richardson entre la surface --> la 1ere couche |
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REAL, dimension(klon) :: ri1 |
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REAL, dimension(klon) :: testar, qstar |
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REAL, dimension(klon) :: zdte, zdq |
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! lmon : longueur de Monin-Obukhov selon Hess, Colman and McAvaney |
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DOUBLE PRECISION, dimension(klon) :: lmon |
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DOUBLE PRECISION, parameter :: eps=1.0D-20 |
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REAL, dimension(klon) :: delu, delte, delq |
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REAL, dimension(klon) :: u_zref, te_zref, q_zref |
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REAL, dimension(klon) :: temp, pref |
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LOGICAL :: okri |
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REAL, dimension(klon) :: u_zref_p, te_zref_p, temp_p, q_zref_p |
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!convertgence |
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REAL, dimension(klon) :: te_zref_con, q_zref_con |
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REAL, dimension(klon) :: u_zref_c, te_zref_c, temp_c, q_zref_c |
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REAL, dimension(klon) :: ok_pred, ok_corr |
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! REAL, dimension(klon) :: conv_te, conv_q |
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!------------------------------------------------------------------------- |
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DO i=1, knon |
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speed(i)=SQRT(u1(i)**2+v1(i)**2) |
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ri1(i) = 0.0 |
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ENDDO |
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! |
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okri=.FALSE. |
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CALL coefcdrag(klon, knon, nsrf, zxli, & |
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& speed, t1, q1, z1, psol, & |
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& ts1, qsurf, rugos, okri, ri1, & |
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& cdram, cdrah, cdran, zri1, pref) |
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! |
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!---------Star variables---------------------------------------------------- |
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! |
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DO i = 1, knon |
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ri1(i) = zri1(i) |
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tpot(i) = t1(i)* (psol(i)/pat1(i))**RKAPPA |
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ustar(i) = sqrt(cdram(i) * speed(i) * speed(i)) |
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zdte(i) = tpot(i) - ts1(i) |
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zdq(i) = max(q1(i),0.0) - max(qsurf(i),0.0) |
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! |
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! |
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!IM BUG BUG BUG zdte(i) = max(zdte(i),1.e-10) |
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zdte(i) = sign(max(abs(zdte(i)),1.e-10),zdte(i)) |
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! |
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testar(i) = (cdrah(i) * zdte(i) * speed(i))/ustar(i) |
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qstar(i) = (cdrah(i) * zdq(i) * speed(i))/ustar(i) |
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lmon(i) = (ustar(i) * ustar(i) * tpot(i))/ & |
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& (RKAR * RG * testar(i)) |
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ENDDO |
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! |
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!----------First aproximation of variables at zref -------------------------- |
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zref = 2.0 |
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CALL screenp(klon, knon, nsrf, speed, tpot, q1, & |
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& ts1, qsurf, rugos, lmon, & |
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& ustar, testar, qstar, zref, & |
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& delu, delte, delq) |
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! |
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DO i = 1, knon |
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u_zref(i) = delu(i) |
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q_zref(i) = max(qsurf(i),0.0) + delq(i) |
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te_zref(i) = ts1(i) + delte(i) |
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temp(i) = te_zref(i) * (psol(i)/pat1(i))**(-RKAPPA) |
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q_zref_p(i) = q_zref(i) |
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! te_zref_p(i) = te_zref(i) |
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temp_p(i) = temp(i) |
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ENDDO |
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! |
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! Iteration of the variables at the reference level zref : corrector calculation ; see Hess & McAvaney, 1995 |
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DO n = 1, niter |
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okri=.TRUE. |
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CALL screenc(klon, knon, nsrf, zxli, & |
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& u_zref, temp, q_zref, zref, & |
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& ts1, qsurf, rugos, psol, & |
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& ustar, testar, qstar, okri, ri1, & |
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& pref, delu, delte, delq) |
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! |
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DO i = 1, knon |
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u_zref(i) = delu(i) |
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q_zref(i) = delq(i) + max(qsurf(i),0.0) |
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te_zref(i) = delte(i) + ts1(i) |
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! |
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! return to normal temperature |
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! |
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temp(i) = te_zref(i) * (psol(i)/pref(i))**(-RKAPPA) |
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! temp(i) = te_zref(i) - (zref* RG)/RCPD/ & |
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! (1 + RVTMP2 * max(q_zref(i),0.0)) |
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! |
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!IM +++ |
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! IF(temp(i).GT.350.) THEN |
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! WRITE(*,*) 'temp(i) GT 350 K !!',i,nsrf,temp(i) |
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! ENDIF |
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!IM --- |
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! |
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IF(n.EQ.ncon) THEN |
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te_zref_con(i) = te_zref(i) |
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q_zref_con(i) = q_zref(i) |
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ENDIF |
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! |
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ENDDO |
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! |
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ENDDO |
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! verifier le critere de convergence : 0.25% pour te_zref et 5% pour qe_zref |
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! |
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! DO i = 1, knon |
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! conv_te(i) = (te_zref(i) - te_zref_con(i))/te_zref_con(i) |
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! conv_q(i) = (q_zref(i) - q_zref_con(i))/q_zref_con(i) |
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!IM +++ |
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! IF(abs(conv_te(i)).GE.0.0025.AND.abs(conv_q(i)).GE.0.05) THEN |
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! PRINT*,'DIV','i=',i,te_zref_con(i),te_zref(i),conv_te(i), & |
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! q_zref_con(i),q_zref(i),conv_q(i) |
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! ENDIF |
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!IM --- |
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! ENDDO |
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! |
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DO i = 1, knon |
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q_zref_c(i) = q_zref(i) |
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temp_c(i) = temp(i) |
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! |
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! IF(zri1(i).LT.0.) THEN |
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! IF(nsrf.EQ.1) THEN |
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! ok_pred(i)=1. |
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! ok_corr(i)=0. |
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! ELSE |
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! ok_pred(i)=0. |
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! ok_corr(i)=1. |
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! ENDIF |
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! ELSE |
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! ok_pred(i)=0. |
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! ok_corr(i)=1. |
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! ENDIF |
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! |
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ok_pred(i)=0. |
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ok_corr(i)=1. |
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! |
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t_2m(i) = temp_p(i) * ok_pred(i) + temp_c(i) * ok_corr(i) |
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q_2m(i) = q_zref_p(i) * ok_pred(i) + q_zref_c(i) * ok_corr(i) |
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!IM +++ |
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! IF(n.EQ.niter) THEN |
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! IF(t_2m(i).LT.t1(i).AND.t_2m(i).LT.ts1(i)) THEN |
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! PRINT*,' BAD t2m LT ',i,nsrf,t_2m(i),t1(i),ts1(i) |
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! ELSEIF(t_2m(i).GT.t1(i).AND.t_2m(i).GT.ts1(i)) THEN |
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! PRINT*,' BAD t2m GT ',i,nsrf,t_2m(i),t1(i),ts1(i) |
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! ENDIF |
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! ENDIF |
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!IM --- |
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ENDDO |
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!----------First aproximation of variables at zref -------------------------- |
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! |
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zref = 10.0 |
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CALL screenp(klon, knon, nsrf, speed, tpot, q1, & |
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& ts1, qsurf, rugos, lmon, & |
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& ustar, testar, qstar, zref, & |
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& delu, delte, delq) |
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! |
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DO i = 1, knon |
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u_zref(i) = delu(i) |
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q_zref(i) = max(qsurf(i),0.0) + delq(i) |
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te_zref(i) = ts1(i) + delte(i) |
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temp(i) = te_zref(i) * (psol(i)/pat1(i))**(-RKAPPA) |
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! temp(i) = te_zref(i) - (zref* RG)/RCPD/ & |
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! (1 + RVTMP2 * max(q_zref(i),0.0)) |
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u_zref_p(i) = u_zref(i) |
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ENDDO |
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! |
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! Iteration of the variables at the reference level zref : corrector ; see Hess & McAvaney, 1995 |
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! |
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DO n = 1, niter |
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! |
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okri=.TRUE. |
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CALL screenc(klon, knon, nsrf, zxli, & |
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& u_zref, temp, q_zref, zref, & |
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& ts1, qsurf, rugos, psol, & |
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& ustar, testar, qstar, okri, ri1, & |
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& pref, delu, delte, delq) |
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! |
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DO i = 1, knon |
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u_zref(i) = delu(i) |
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q_zref(i) = delq(i) + max(qsurf(i),0.0) |
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te_zref(i) = delte(i) + ts1(i) |
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temp(i) = te_zref(i) * (psol(i)/pref(i))**(-RKAPPA) |
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! temp(i) = te_zref(i) - (zref* RG)/RCPD/ & |
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! (1 + RVTMP2 * max(q_zref(i),0.0)) |
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ENDDO |
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! |
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ENDDO |
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! |
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DO i = 1, knon |
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u_zref_c(i) = u_zref(i) |
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! |
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u_10m(i) = u_zref_p(i) * ok_pred(i) + u_zref_c(i) * ok_corr(i) |
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! |
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!AM |
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q_zref_c(i) = q_zref(i) |
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temp_c(i) = temp(i) |
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t_10m(i) = temp_p(i) * ok_pred(i) + temp_c(i) * ok_corr(i) |
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q_10m(i) = q_zref_p(i) * ok_pred(i) + q_zref_c(i) * ok_corr(i) |
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!MA |
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ENDDO |
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! |
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RETURN |
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END subroutine stdlevvar |
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