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module yamada_m |
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IMPLICIT NONE |
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contains |
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SUBROUTINE yamada(ngrid, g, zlev, zlay, u, v, teta, q2, km, kn) |
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! From LMDZ4/libf/phylmd/yamada.F,v 1.1 2004/06/22 11:45:36 |
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USE dimens_m |
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USE dimphy |
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! ....................................................................... |
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! ....................................................................... |
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! g : g |
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! zlev : altitude a chaque niveau (interface inferieure de la couche |
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! de meme indice) |
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! zlay : altitude au centre de chaque couche |
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! u,v : vitesse au centre de chaque couche |
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! (en entree : la valeur au debut du pas de temps) |
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! teta : temperature potentielle au centre de chaque couche |
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! (en entree : la valeur au debut du pas de temps) |
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! q2 : $q^2$ au bas de chaque couche |
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! (en entree : la valeur au debut du pas de temps) |
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! (en sortie : la valeur a la fin du pas de temps) |
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! km : diffusivite turbulente de quantite de mouvement (au bas de chaque |
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! couche) |
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! (en sortie : la valeur a la fin du pas de temps) |
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! kn : diffusivite turbulente des scalaires (au bas de chaque couche) |
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! (en sortie : la valeur a la fin du pas de temps) |
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! ....................................................................... |
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REAL, INTENT (IN) :: g |
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REAL zlev(klon, klev+1) |
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REAL zlay(klon, klev) |
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REAL u(klon, klev) |
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REAL v(klon, klev) |
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REAL teta(klon, klev) |
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REAL q2(klon, klev+1) |
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REAL km(klon, klev+1) |
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REAL kn(klon, klev+1) |
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INTEGER ngrid |
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INTEGER nlay |
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PARAMETER (nlay=klev) |
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LOGICAL first |
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SAVE first |
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DATA first/.TRUE./ |
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INTEGER ig, k |
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REAL ri, zrif, zalpha, zsm |
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REAL rif(klon, klev+1), sm(klon, klev+1), alpha(klon, klev) |
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REAL m2(klon, klev+1), dz(klon, klev+1), zq, n2(klon, klev+1) |
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REAL l(klon, klev+1), l0(klon) |
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REAL sq(klon), sqz(klon), zz(klon, klev+1) |
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INTEGER iter |
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REAL ric, rifc, b1, kap |
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SAVE ric, rifc, b1, kap |
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DATA ric, rifc, b1, kap/0.195, 0.191, 16.6, 0.3/ |
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IF (0==1 .AND. first) THEN |
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DO ig = 1, 1000 |
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ri = (ig-800.)/500. |
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IF (ri<ric) THEN |
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zrif = frif(ri) |
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ELSE |
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zrif = rifc |
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END IF |
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IF (zrif<0.16) THEN |
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zalpha = falpha(zrif) |
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zsm = fsm(zrif) |
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ELSE |
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zalpha = 1.12 |
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zsm = 0.085 |
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END IF |
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PRINT *, ri, rif, zalpha, zsm |
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END DO |
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first = .FALSE. |
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END IF |
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! Correction d'un bug sauvage a verifier. |
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! do k=2,nlev |
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DO k = 2, nlay |
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DO ig = 1, ngrid |
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dz(ig, k) = zlay(ig, k) - zlay(ig, k-1) |
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m2(ig, k) = ((u(ig,k)-u(ig,k-1))**2+(v(ig,k)-v(ig, & |
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k-1))**2)/(dz(ig,k)*dz(ig,k)) |
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n2(ig, k) = g*2.*(teta(ig,k)-teta(ig,k-1))/(teta(ig,k-1)+teta(ig,k))/ & |
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dz(ig, k) |
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ri = n2(ig, k)/max(m2(ig,k), 1.E-10) |
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IF (ri<ric) THEN |
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rif(ig, k) = frif(ri) |
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ELSE |
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rif(ig, k) = rifc |
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END IF |
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IF (rif(ig,k)<0.16) THEN |
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alpha(ig, k) = falpha(rif(ig,k)) |
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sm(ig, k) = fsm(rif(ig,k)) |
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ELSE |
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alpha(ig, k) = 1.12 |
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sm(ig, k) = 0.085 |
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END IF |
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zz(ig, k) = b1*m2(ig, k)*(1.-rif(ig,k))*sm(ig, k) |
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END DO |
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END DO |
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! iterration pour determiner la longueur de melange |
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DO ig = 1, ngrid |
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l0(ig) = 100. |
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END DO |
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DO k = 2, klev - 1 |
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DO ig = 1, ngrid |
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l(ig, k) = l0(ig)*kap*zlev(ig, k)/(kap*zlev(ig,k)+l0(ig)) |
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END DO |
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END DO |
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DO iter = 1, 10 |
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DO ig = 1, ngrid |
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sq(ig) = 1.E-10 |
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sqz(ig) = 1.E-10 |
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END DO |
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DO k = 2, klev - 1 |
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DO ig = 1, ngrid |
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q2(ig, k) = l(ig, k)**2*zz(ig, k) |
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l(ig, k) = min(l0(ig)*kap*zlev(ig,k)/(kap*zlev(ig, & |
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k)+l0(ig)), 0.5*sqrt(q2(ig,k))/sqrt(max(n2(ig,k),1.E-10))) |
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zq = sqrt(q2(ig,k)) |
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sqz(ig) = sqz(ig) + zq*zlev(ig, k)*(zlay(ig,k)-zlay(ig,k-1)) |
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sq(ig) = sq(ig) + zq*(zlay(ig,k)-zlay(ig,k-1)) |
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END DO |
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END DO |
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DO ig = 1, ngrid |
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l0(ig) = 0.2*sqz(ig)/sq(ig) |
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END DO |
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! (abd 3 5 2) print*,'ITER=',iter,' L0=',l0 |
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END DO |
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DO k = 2, klev |
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DO ig = 1, ngrid |
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l(ig, k) = min(l0(ig)*kap*zlev(ig,k)/(kap*zlev(ig, & |
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k)+l0(ig)), 0.5*sqrt(q2(ig,k))/sqrt(max(n2(ig,k),1.E-10))) |
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q2(ig, k) = l(ig, k)**2*zz(ig, k) |
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km(ig, k) = l(ig, k)*sqrt(q2(ig,k))*sm(ig, k) |
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kn(ig, k) = km(ig, k)*alpha(ig, k) |
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END DO |
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END DO |
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contains |
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REAL function frif(ri) |
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real ri |
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frif = 0.6588*(ri+0.1776-sqrt(ri*ri-0.3221*ri+0.03156)) |
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end function frif |
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REAL function falpha(ri) |
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real ri |
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falpha = 1.318*(0.2231-ri)/(0.2341-ri) |
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end function falpha |
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REAL function fsm(ri) |
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real ri |
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fsm = 1.96*(0.1912-ri)*(0.2341-ri)/((1.-ri)*(0.2231-ri)) |
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end function fsm |
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END SUBROUTINE yamada |
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end module yamada_m |
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