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guez |
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module calcul_fluxs_m |
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implicit none |
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contains |
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SUBROUTINE calcul_fluxs( klon, knon, nisurf, dtime, & |
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tsurf, p1lay, cal, beta, coef1lay, ps, & |
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precip_rain, precip_snow, snow, qsurf, & |
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radsol, dif_grnd, t1lay, q1lay, u1lay, v1lay, & |
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petAcoef, peqAcoef, petBcoef, peqBcoef, & |
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tsurf_new, evap, fluxlat, fluxsens, dflux_s, dflux_l) |
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guez |
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! Cette routine calcule les fluxs en h et q à l'interface et une |
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! température de surface. |
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guez |
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! L. Fairhead 4/2000 |
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! input: |
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! knon nombre de points a traiter |
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! nisurf surface a traiter |
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! tsurf temperature de surface |
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! p1lay pression 1er niveau (milieu de couche) |
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! cal capacite calorifique du sol |
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! beta evap reelle |
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! coef1lay coefficient d'echange |
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! ps pression au sol |
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! precip_rain precipitations liquides |
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! precip_snow precipitations solides |
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! snow champs hauteur de neige |
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! runoff runoff en cas de trop plein |
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! petAcoef coeff. A de la resolution de la CL pour t |
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! peqAcoef coeff. A de la resolution de la CL pour q |
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! petBcoef coeff. B de la resolution de la CL pour t |
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! peqBcoef coeff. B de la resolution de la CL pour q |
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! radsol rayonnement net aus sol (LW + SW) |
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! dif_grnd coeff. diffusion vers le sol profond |
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! output: |
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! tsurf_new temperature au sol |
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! qsurf humidite de l'air au dessus du sol |
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! fluxsens flux de chaleur sensible |
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! fluxlat flux de chaleur latente |
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! dflux_s derivee du flux de chaleur sensible / Ts |
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! dflux_l derivee du flux de chaleur latente / Ts |
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use indicesol |
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use abort_gcm_m, only: abort_gcm |
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use yoethf_m |
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use fcttre, only: thermcep, foeew, qsats, qsatl, foede, dqsats, dqsatl |
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use SUPHEC_M |
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use interface_surf |
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! Parametres d'entree |
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integer, intent(IN) :: knon, nisurf, klon |
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real , intent(IN) :: dtime |
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real, dimension(klon), intent(IN) :: petAcoef, peqAcoef |
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real, dimension(klon), intent(IN) :: petBcoef, peqBcoef |
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real, dimension(klon), intent(IN) :: ps, q1lay |
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real, dimension(klon), intent(IN) :: tsurf, p1lay, cal, beta, coef1lay |
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real, dimension(klon), intent(IN) :: precip_rain, precip_snow |
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real, dimension(klon), intent(IN) :: radsol, dif_grnd |
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real, dimension(klon), intent(IN) :: t1lay, u1lay, v1lay |
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real, dimension(klon), intent(INOUT) :: snow, qsurf |
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! Parametres sorties |
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real, dimension(klon), intent(OUT):: tsurf_new, evap, fluxsens, fluxlat |
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real, dimension(klon), intent(OUT):: dflux_s, dflux_l |
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! Variables locales |
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integer :: i |
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real, dimension(klon) :: zx_mh, zx_nh, zx_oh |
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real, dimension(klon) :: zx_mq, zx_nq, zx_oq |
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real, dimension(klon) :: zx_pkh, zx_dq_s_dt, zx_qsat, zx_coef |
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real, dimension(klon) :: zx_sl, zx_k1 |
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real, dimension(klon) :: zx_q_0 , d_ts |
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real :: zdelta, zcvm5, zx_qs, zcor, zx_dq_s_dh |
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real :: bilan_f, fq_fonte |
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REAL :: subli, fsno |
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REAL :: qsat_new, q1_new |
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real, parameter :: t_grnd = 271.35, t_coup = 273.15 |
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!! PB temporaire en attendant mieux pour le modele de neige |
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REAL, parameter :: chasno = 3.334E+05/(2.3867E+06*0.15) |
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logical, save :: check = .false. |
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character (len = 20) :: modname = 'calcul_fluxs' |
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logical, save :: fonte_neige = .false. |
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real, save :: max_eau_sol = 150.0 |
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character (len = 80) :: abort_message |
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logical, save :: first = .true., second=.false. |
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if (check) write(*, *)'Entree ', modname, ' surface = ', nisurf |
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IF (check) THEN |
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WRITE(*, *)' radsol (min, max)' & |
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, MINVAL(radsol(1:knon)), MAXVAL(radsol(1:knon)) |
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!!CALL flush(6) |
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ENDIF |
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if (size(coastalflow) /= knon .AND. nisurf == is_ter) then |
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write(*, *)'Bizarre, le nombre de points continentaux' |
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write(*, *)'a change entre deux appels. J''arrete ...' |
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abort_message='Pb run_off' |
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call abort_gcm(modname, abort_message, 1) |
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endif |
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! Traitement neige et humidite du sol |
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! Initialisation |
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evap = 0. |
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fluxsens=0. |
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fluxlat=0. |
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dflux_s = 0. |
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dflux_l = 0. |
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! zx_qs = qsat en kg/kg |
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DO i = 1, knon |
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zx_pkh(i) = (ps(i)/ps(i))**RKAPPA |
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IF (thermcep) THEN |
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zdelta=MAX(0., SIGN(1., rtt-tsurf(i))) |
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zcvm5 = R5LES*RLVTT*(1.-zdelta) + R5IES*RLSTT*zdelta |
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zcvm5 = zcvm5 / RCPD / (1.0+RVTMP2*q1lay(i)) |
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zx_qs= r2es * FOEEW(tsurf(i), zdelta)/ps(i) |
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zx_qs=MIN(0.5, zx_qs) |
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zcor=1./(1.-retv*zx_qs) |
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zx_qs=zx_qs*zcor |
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zx_dq_s_dh = FOEDE(tsurf(i), zdelta, zcvm5, zx_qs, zcor) & |
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/RLVTT / zx_pkh(i) |
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ELSE |
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IF (tsurf(i).LT.t_coup) THEN |
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zx_qs = qsats(tsurf(i)) / ps(i) |
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zx_dq_s_dh = dqsats(tsurf(i), zx_qs)/RLVTT & |
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/ zx_pkh(i) |
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ELSE |
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zx_qs = qsatl(tsurf(i)) / ps(i) |
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zx_dq_s_dh = dqsatl(tsurf(i), zx_qs)/RLVTT & |
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/ zx_pkh(i) |
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ENDIF |
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ENDIF |
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zx_dq_s_dt(i) = RCPD * zx_pkh(i) * zx_dq_s_dh |
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zx_qsat(i) = zx_qs |
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zx_coef(i) = coef1lay(i) & |
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* (1.0+SQRT(u1lay(i)**2+v1lay(i)**2)) & |
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* p1lay(i)/(RD*t1lay(i)) |
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ENDDO |
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! === Calcul de la temperature de surface === |
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! zx_sl = chaleur latente d'evaporation ou de sublimation |
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do i = 1, knon |
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zx_sl(i) = RLVTT |
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if (tsurf(i) .LT. RTT) zx_sl(i) = RLSTT |
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zx_k1(i) = zx_coef(i) |
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enddo |
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do i = 1, knon |
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! Q |
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zx_oq(i) = 1. - (beta(i) * zx_k1(i) * peqBcoef(i) * dtime) |
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zx_mq(i) = beta(i) * zx_k1(i) * & |
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(peqAcoef(i) - zx_qsat(i) & |
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+ zx_dq_s_dt(i) * tsurf(i)) & |
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/ zx_oq(i) |
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zx_nq(i) = beta(i) * zx_k1(i) * (-1. * zx_dq_s_dt(i)) & |
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/ zx_oq(i) |
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! H |
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zx_oh(i) = 1. - (zx_k1(i) * petBcoef(i) * dtime) |
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zx_mh(i) = zx_k1(i) * petAcoef(i) / zx_oh(i) |
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zx_nh(i) = - (zx_k1(i) * RCPD * zx_pkh(i))/ zx_oh(i) |
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! Tsurface |
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tsurf_new(i) = (tsurf(i) + cal(i)/(RCPD * zx_pkh(i)) * dtime * & |
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(radsol(i) + zx_mh(i) + zx_sl(i) * zx_mq(i)) & |
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+ dif_grnd(i) * t_grnd * dtime)/ & |
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( 1. - dtime * cal(i)/(RCPD * zx_pkh(i)) * ( & |
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zx_nh(i) + zx_sl(i) * zx_nq(i)) & |
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+ dtime * dif_grnd(i)) |
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! Y'a-t-il fonte de neige? |
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! fonte_neige = (nisurf /= is_oce) .AND. & |
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! & (snow(i) > epsfra .OR. nisurf == is_sic .OR. nisurf == is_lic) & |
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! & .AND. (tsurf_new(i) >= RTT) |
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! if (fonte_neige) tsurf_new(i) = RTT |
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d_ts(i) = tsurf_new(i) - tsurf(i) |
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! zx_h_ts(i) = tsurf_new(i) * RCPD * zx_pkh(i) |
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! zx_q_0(i) = zx_qsat(i) + zx_dq_s_dt(i) * d_ts(i) |
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!== flux_q est le flux de vapeur d'eau: kg/(m**2 s) positive vers bas |
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!== flux_t est le flux de cpt (energie sensible): j/(m**2 s) |
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evap(i) = - zx_mq(i) - zx_nq(i) * tsurf_new(i) |
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fluxlat(i) = - evap(i) * zx_sl(i) |
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fluxsens(i) = zx_mh(i) + zx_nh(i) * tsurf_new(i) |
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! Derives des flux dF/dTs (W m-2 K-1): |
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dflux_s(i) = zx_nh(i) |
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dflux_l(i) = (zx_sl(i) * zx_nq(i)) |
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! Nouvelle valeure de l'humidite au dessus du sol |
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qsat_new=zx_qsat(i) + zx_dq_s_dt(i) * d_ts(i) |
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q1_new = peqAcoef(i) - peqBcoef(i)*evap(i)*dtime |
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qsurf(i)=q1_new*(1.-beta(i)) + beta(i)*qsat_new |
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ENDDO |
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END SUBROUTINE calcul_fluxs |
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end module calcul_fluxs_m |
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