--- trunk/Sources/phylmd/Interface_surf/fonte_neige.f 2016/08/30 12:52:46 206 +++ trunk/phylmd/Interface_surf/fonte_neige.f 2018/09/11 11:08:38 305 @@ -4,35 +4,28 @@ contains - SUBROUTINE fonte_neige(nisurf, dtime, tsurf, p1lay, beta, coef1lay, ps, & - precip_rain, precip_snow, snow, qsol, t1lay, q1lay, u1lay, v1lay, & - petAcoef, peqAcoef, petBcoef, peqBcoef, tsurf_new, evap, fqcalving, & - ffonte, run_off_lic_0) + SUBROUTINE fonte_neige(nisurf, rain_fall, snow_fall, snow, qsol, & + tsurf_new, evap, fqcalving, ffonte, run_off_lic_0, run_off_lic) ! Routine de traitement de la fonte de la neige dans le cas du traitement ! de sol simplifi\'e ! Laurent Fairhead, March, 2001 - USE fcttre, ONLY: foeew, qsatl, qsats, thermcep - USE indicesol, ONLY: epsfra, is_lic, is_sic, is_ter - USE interface_surf, ONLY: run_off_lic, tau_calv + ! Library: use nr_util, only: assert_eq - USE suphec_m, ONLY: rcpd, rday, retv, rlmlt, rlstt, rlvtt, rtt - USE yoethf_m, ONLY: r2es, r5ies, r5les, rvtmp2 + + use comconst, only: dtphys + USE indicesol, ONLY: epsfra, is_lic, is_sic, is_ter + USE conf_interface_m, ONLY: tau_calv + USE suphec_m, ONLY: rday, rlmlt, rtt integer, intent(IN):: nisurf ! surface \`a traiter - real, intent(IN):: dtime ! pas de temps de la physique (en s) - real, intent(IN):: tsurf(:) ! (knon) temperature de surface - real, intent(IN):: p1lay(:) ! (knon) pression 1er niveau (milieu de couche) - real, intent(IN):: beta(:) ! (knon) evap reelle - real, intent(IN):: coef1lay(:) ! (knon) coefficient d'echange - real, intent(IN):: ps(:) ! (knon) pression au sol - real, intent(IN):: precip_rain(:) ! (knon) + real, intent(IN):: rain_fall(:) ! (knon) ! precipitation, liquid water mass flux (kg / m2 / s), positive down - real, intent(IN):: precip_snow(:) ! (knon) + real, intent(IN):: snow_fall(:) ! (knon) ! precipitation, solid water mass flux (kg / m2 / s), positive down real, intent(INOUT):: snow(:) ! (knon) @@ -41,19 +34,7 @@ real, intent(INOUT):: qsol(:) ! (knon) ! column-density of water in soil, in kg m-2 - real, intent(IN):: t1lay(:) ! (knon) - real, intent(IN):: q1lay(:) ! (knon) - real, intent(IN):: u1lay(:), v1lay(:) ! (knon) - - real, intent(IN):: petAcoef(:), peqAcoef(:) ! (knon) - ! coefficients A de la r\'esolution de la couche limite pour t et q - - real, intent(IN):: petBcoef(:), peqBcoef(:) ! (knon) - ! coefficients B de la r\'esolution de la couche limite pour t et q - - real, intent(INOUT):: tsurf_new(:) - ! tsurf_new temperature au sol - + real, intent(INOUT):: tsurf_new(:) ! (knon) temp\'erature au sol real, intent(IN):: evap(:) ! (knon) real, intent(OUT):: fqcalving(:) ! (knon) @@ -66,103 +47,80 @@ real, intent(INOUT):: run_off_lic_0(:) ! (knon) ! run off glacier du pas de temps pr\'ecedent + REAL, intent(OUT):: run_off_lic(:) ! (knon) ruissellement total + ! Local: integer knon ! nombre de points \`a traiter - real, parameter:: snow_max=3000. + + real, parameter:: snow_max = 3000. ! Masse maximum de neige (kg / m2). Au dessus de ce seuil, la neige - ! en exces "s'ecoule" (calving) + ! en exces "s'\'ecoule" (calving). integer i - logical zdelta - real zcvm5, zx_qs, zcor real fq_fonte - REAL bil_eau_s(size(ps)) ! in kg m-2 - real snow_evap(size(ps)) ! in kg m-2 s-1 - real, parameter:: t_coup = 273.15 - REAL, parameter:: chasno = 3.334E5 / (2.3867E6*0.15) - REAL, parameter:: chaice = 3.334E5 / (2.3867E6*0.15) + REAL bil_eau_s(size(rain_fall)) ! (knon) in kg m-2 + real snow_evap(size(rain_fall)) ! (knon) in kg m-2 s-1 + REAL, parameter:: chasno = 3.334E5 / (2.3867E6 * 0.15) + REAL, parameter:: chaice = 3.334E5 / (2.3867E6 * 0.15) real, parameter:: max_eau_sol = 150. ! in kg m-2 real coeff_rel !-------------------------------------------------------------------- - knon = assert_eq((/size(tsurf), size(p1lay), size(beta), size(coef1lay), & - size(ps), size(precip_rain), size(precip_snow), size(snow), & - size(qsol), size(t1lay), size(q1lay), size(u1lay), size(v1lay), & - size(petAcoef), size(peqAcoef), size(petBcoef), size(peqBcoef), & - size(tsurf_new), size(evap), size(fqcalving), size(ffonte), & - size(run_off_lic_0)/), "fonte_neige knon") - - ! Initialisations - coeff_rel = dtime / (tau_calv * rday) - bil_eau_s = 0. - DO i = 1, knon - IF (thermcep) THEN - zdelta= rtt >= tsurf(i) - zcvm5 = merge(R5IES*RLSTT, R5LES*RLVTT, zdelta) - zcvm5 = zcvm5 / RCPD / (1. + RVTMP2*q1lay(i)) - zx_qs= r2es * FOEEW(tsurf(i), zdelta) / ps(i) - zx_qs=MIN(0.5, zx_qs) - zcor=1. / (1.-retv*zx_qs) - zx_qs=zx_qs*zcor - ELSE - IF (tsurf(i) < t_coup) THEN - zx_qs = qsats(tsurf(i)) / ps(i) - ELSE - zx_qs = qsatl(tsurf(i)) / ps(i) - ENDIF - ENDIF - ENDDO - - ! Calcul de la temperature de surface + knon = assert_eq((/size(rain_fall), size(snow_fall), size(snow), & + size(qsol), size(tsurf_new), size(evap), size(fqcalving), & + size(ffonte), size(run_off_lic_0)/), "fonte_neige knon") - WHERE (precip_snow > 0.) snow = snow + precip_snow * dtime + coeff_rel = dtphys / (tau_calv * rday) + WHERE (snow_fall > 0.) snow = snow + snow_fall * dtphys WHERE (evap > 0.) - snow_evap = MIN(snow / dtime, evap) - snow = snow - snow_evap * dtime + snow_evap = MIN(snow / dtphys, evap) + snow = snow - snow_evap * dtphys snow = MAX(0., snow) elsewhere snow_evap = 0. end where - bil_eau_s = precip_rain * dtime - (evap(:knon) - snow_evap(:knon)) * dtime + bil_eau_s = (rain_fall - evap + snow_evap) * dtphys ! Y a-t-il fonte de neige ? - ffonte=0. do i = 1, knon if ((snow(i) > epsfra .OR. nisurf == is_sic & .OR. nisurf == is_lic) .AND. tsurf_new(i) >= RTT) then - fq_fonte = MIN(MAX((tsurf_new(i)-RTT) / chasno, 0.), snow(i)) - ffonte(i) = fq_fonte * RLMLT / dtime + fq_fonte = MIN(MAX((tsurf_new(i) - RTT) / chasno, 0.), snow(i)) + ffonte(i) = fq_fonte * RLMLT / dtphys snow(i) = max(0., snow(i) - fq_fonte) bil_eau_s(i) = bil_eau_s(i) + fq_fonte tsurf_new(i) = tsurf_new(i) - fq_fonte * chasno - !IM cf JLD/ GKtest fonte aussi pour la glace + + !IM cf. JLD/ GKtest fonte aussi pour la glace IF (nisurf == is_sic .OR. nisurf == is_lic) THEN - fq_fonte = MAX((tsurf_new(i)-RTT) / chaice, 0.) - ffonte(i) = ffonte(i) + fq_fonte * RLMLT / dtime + fq_fonte = MAX((tsurf_new(i) - RTT) / chaice, 0.) + ffonte(i) = ffonte(i) + fq_fonte * RLMLT / dtphys bil_eau_s(i) = bil_eau_s(i) + fq_fonte tsurf_new(i) = RTT ENDIF + else + ffonte(i) = 0. endif ! S'il y a une hauteur trop importante de neige, elle s'\'ecoule - fqcalving(i) = max(0., snow(i) - snow_max) / dtime - snow(i)=min(snow(i), snow_max) + fqcalving(i) = max(0., snow(i) - snow_max) / dtphys + snow(i) = min(snow(i), snow_max) + enddo - IF (nisurf == is_ter) then - qsol(i) = qsol(i) + bil_eau_s(i) - qsol(i) = MIN(qsol(i), max_eau_sol) - else if (nisurf == is_lic) then - run_off_lic(i) = (coeff_rel * fqcalving(i)) + & + IF (nisurf == is_ter) then + qsol = MIN(qsol + bil_eau_s, max_eau_sol) + else if (nisurf == is_lic) then + do i = 1, knon + run_off_lic_0(i) = (coeff_rel * fqcalving(i)) + & (1. - coeff_rel) * run_off_lic_0(i) - run_off_lic_0(i) = run_off_lic(i) - run_off_lic(i) = run_off_lic(i) + bil_eau_s(i) / dtime - endif - enddo + run_off_lic(i) = run_off_lic_0(i) + bil_eau_s(i) / dtphys + enddo + endif END SUBROUTINE fonte_neige