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SUBROUTINE clvent(knon,dtime, u1lay,v1lay,coef,t,ven, |
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e paprs,pplay,delp, |
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s d_ven,flux_v) |
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use dimens_m |
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use dimphy |
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use iniprint |
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use YOMCST |
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IMPLICIT none |
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c====================================================================== |
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c Auteur(s): Z.X. Li (LMD/CNRS) date: 19930818 |
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c Objet: diffusion vertical de la vitesse "ven" |
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c====================================================================== |
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c Arguments: |
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c dtime----input-R- intervalle du temps (en second) |
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c u1lay----input-R- vent u de la premiere couche (m/s) |
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c v1lay----input-R- vent v de la premiere couche (m/s) |
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c coef-----input-R- le coefficient d'echange (m**2/s) multiplie par |
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c le cisaillement du vent (dV/dz); la premiere |
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c valeur indique la valeur de Cdrag (sans unite) |
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c t--------input-R- temperature (K) |
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c ven------input-R- vitesse horizontale (m/s) |
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c paprs----input-R- pression a inter-couche (Pa) |
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c pplay----input-R- pression au milieu de couche (Pa) |
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c delp-----input-R- epaisseur de couche (Pa) |
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c |
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c |
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c d_ven----output-R- le changement de "ven" |
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c flux_v---output-R- (diagnostic) flux du vent: (kg m/s)/(m**2 s) |
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c====================================================================== |
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INTEGER knon |
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REAL dtime |
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REAL u1lay(klon), v1lay(klon) |
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REAL coef(klon,klev) |
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REAL t(klon,klev), ven(klon,klev) |
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REAL paprs(klon,klev+1), pplay(klon,klev), delp(klon,klev) |
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REAL d_ven(klon,klev) |
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REAL flux_v(klon,klev) |
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c====================================================================== |
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c====================================================================== |
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INTEGER i, k |
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REAL zx_cv(klon,2:klev) |
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REAL zx_dv(klon,2:klev) |
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REAL zx_buf(klon) |
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REAL zx_coef(klon,klev) |
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REAL local_ven(klon,klev) |
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REAL zx_alf1(klon), zx_alf2(klon) |
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c====================================================================== |
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DO k = 1, klev |
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DO i = 1, knon |
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local_ven(i,k) = ven(i,k) |
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ENDDO |
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ENDDO |
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c====================================================================== |
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DO i = 1, knon |
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ccc zx_alf1(i) = (paprs(i,1)-pplay(i,2))/(pplay(i,1)-pplay(i,2)) |
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zx_alf1(i) = 1.0 |
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zx_alf2(i) = 1.0 - zx_alf1(i) |
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zx_coef(i,1) = coef(i,1) |
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. * (1.0+SQRT(u1lay(i)**2+v1lay(i)**2)) |
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. * pplay(i,1)/(RD*t(i,1)) |
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zx_coef(i,1) = zx_coef(i,1) * dtime*RG |
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ENDDO |
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c====================================================================== |
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DO k = 2, klev |
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DO i = 1, knon |
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zx_coef(i,k) = coef(i,k)*RG/(pplay(i,k-1)-pplay(i,k)) |
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. *(paprs(i,k)*2/(t(i,k)+t(i,k-1))/RD)**2 |
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zx_coef(i,k) = zx_coef(i,k) * dtime*RG |
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ENDDO |
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ENDDO |
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c====================================================================== |
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DO i = 1, knon |
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zx_buf(i) = delp(i,1) + zx_coef(i,1)*zx_alf1(i)+zx_coef(i,2) |
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zx_cv(i,2) = local_ven(i,1)*delp(i,1) / zx_buf(i) |
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zx_dv(i,2) = (zx_coef(i,2)-zx_alf2(i)*zx_coef(i,1)) |
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. /zx_buf(i) |
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ENDDO |
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DO k = 3, klev |
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DO i = 1, knon |
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zx_buf(i) = delp(i,k-1) + zx_coef(i,k) |
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. + zx_coef(i,k-1)*(1.-zx_dv(i,k-1)) |
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zx_cv(i,k) = (local_ven(i,k-1)*delp(i,k-1) |
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. +zx_coef(i,k-1)*zx_cv(i,k-1) )/zx_buf(i) |
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zx_dv(i,k) = zx_coef(i,k)/zx_buf(i) |
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ENDDO |
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ENDDO |
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DO i = 1, knon |
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local_ven(i,klev) = ( local_ven(i,klev)*delp(i,klev) |
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. +zx_coef(i,klev)*zx_cv(i,klev) ) |
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. / ( delp(i,klev) + zx_coef(i,klev) |
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. -zx_coef(i,klev)*zx_dv(i,klev) ) |
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ENDDO |
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DO k = klev-1, 1, -1 |
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DO i = 1, knon |
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local_ven(i,k) = zx_cv(i,k+1) + zx_dv(i,k+1)*local_ven(i,k+1) |
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ENDDO |
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ENDDO |
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c====================================================================== |
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c== flux_v est le flux de moment angulaire (positif vers bas) |
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c== dont l'unite est: (kg m/s)/(m**2 s) |
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DO i = 1, knon |
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flux_v(i,1) = zx_coef(i,1)/(RG*dtime) |
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. *(local_ven(i,1)*zx_alf1(i) |
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. +local_ven(i,2)*zx_alf2(i)) |
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ENDDO |
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DO k = 2, klev |
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DO i = 1, knon |
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flux_v(i,k) = zx_coef(i,k)/(RG*dtime) |
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. * (local_ven(i,k)-local_ven(i,k-1)) |
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ENDDO |
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ENDDO |
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c |
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DO k = 1, klev |
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DO i = 1, knon |
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d_ven(i,k) = local_ven(i,k) - ven(i,k) |
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ENDDO |
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ENDDO |
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c |
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RETURN |
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END |
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