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surf_landice_mod.F90 @ 4640

Last change on this file since 4640 was 4538, checked in by evignon, 14 months ago
fix bug in surf_landice_mod
Property copyright set to Name of program: LMDZ Creation date: 1984 Version: LMDZ5 License: CeCILL version 2 Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539 See the license file in the root directory Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 20.5 KB

Rev	Line
[781]	1	!
	2	MODULE surf_landice_mod
	3
	4	IMPLICIT NONE
	5
	6	CONTAINS
	7	!
	8	!****************************************************************************************
	9	!
	10	SUBROUTINE surf_landice(itime, dtime, knon, knindex, &
[1865]	11	rlon, rlat, debut, lafin, &
	12	rmu0, lwdownm, albedo, pphi1, &
[888]	13	swnet, lwnet, tsurf, p1lay, &
[4523]	14	cdragh, cdragm, precip_rain, precip_snow, precip_bs, temp_air, spechum, &
[1067]	15	AcoefH, AcoefQ, BcoefH, BcoefQ, &
	16	AcoefU, AcoefV, BcoefU, BcoefV, &
[4529]	17	AcoefQBS, BcoefQBS, &
[2240]	18	ps, u1, v1, gustiness, rugoro, pctsrf, &
[4523]	19	snow, qsurf, qsol, qbs1, agesno, &
	20	tsoil, z0m, z0h, SFRWL, alb_dir, alb_dif, evap, fluxsens, fluxlat, fluxbs, &
[1067]	21	tsurf_new, dflux_s, dflux_l, &
[3900]	22	alt, slope, cloudf, &
[1865]	23	snowhgt, qsnow, to_ice, sissnow, &
	24	alb3, runoff, &
[1067]	25	flux_u1, flux_v1)
[781]	26
[1067]	27	USE dimphy
[3974]	28	USE geometry_mod, ONLY : longitude,latitude
[3900]	29	USE surface_data, ONLY : type_ocean, calice, calsno, landice_opt, iflag_albcalc
	30	USE fonte_neige_mod, ONLY : fonte_neige,run_off_lic,fqcalving_global,ffonte_global,fqfonte_global,runofflic_global
[1067]	31	USE cpl_mod, ONLY : cpl_send_landice_fields
	32	USE calcul_fluxs_mod
[4523]	33	USE phys_local_var_mod, ONLY : zxrhoslic, zxustartlic
[4414]	34	USE phys_output_var_mod, ONLY : snow_o,zfra_o
[2728]	35	!FC
	36	USE ioipsl_getin_p_mod, ONLY : getin_p
[4529]	37	USE blowing_snow_ini_mod, ONLY : zeta_bs, pbst_bs, prt_bs, iflag_saltation_bs
[2728]	38
[3792]	39	#ifdef CPP_INLANDSIS
	40	USE surf_inlandsis_mod, ONLY : surf_inlandsis
	41	#endif
	42
[1785]	43	USE indice_sol_mod
[1067]	44
[1785]	45	! INCLUDE "indicesol.h"
[781]	46	INCLUDE "dimsoil.h"
[793]	47	INCLUDE "YOMCST.h"
	48	INCLUDE "clesphys.h"
[781]	49
	50	! Input variables
	51	!****************************************************************************************
	52	INTEGER, INTENT(IN) :: itime, knon
	53	INTEGER, DIMENSION(klon), INTENT(in) :: knindex
	54	REAL, INTENT(in) :: dtime
[888]	55	REAL, DIMENSION(klon), INTENT(IN) :: swnet ! net shortwave radiance
	56	REAL, DIMENSION(klon), INTENT(IN) :: lwnet ! net longwave radiance
[781]	57	REAL, DIMENSION(klon), INTENT(IN) :: tsurf
	58	REAL, DIMENSION(klon), INTENT(IN) :: p1lay
[1067]	59	REAL, DIMENSION(klon), INTENT(IN) :: cdragh, cdragm
[4523]	60	REAL, DIMENSION(klon), INTENT(IN) :: precip_rain, precip_snow, precip_bs
[781]	61	REAL, DIMENSION(klon), INTENT(IN) :: temp_air, spechum
[1067]	62	REAL, DIMENSION(klon), INTENT(IN) :: AcoefH, AcoefQ
	63	REAL, DIMENSION(klon), INTENT(IN) :: BcoefH, BcoefQ
	64	REAL, DIMENSION(klon), INTENT(IN) :: AcoefU, AcoefV, BcoefU, BcoefV
[4529]	65	REAL, DIMENSION(klon), INTENT(IN) :: AcoefQBS, BcoefQBS
[781]	66	REAL, DIMENSION(klon), INTENT(IN) :: ps
[4523]	67	REAL, DIMENSION(klon), INTENT(IN) :: u1, v1, gustiness, qbs1
[781]	68	REAL, DIMENSION(klon), INTENT(IN) :: rugoro
	69	REAL, DIMENSION(klon,nbsrf), INTENT(IN) :: pctsrf
	70
[1865]	71	LOGICAL, INTENT(IN) :: debut !true if first step
	72	LOGICAL, INTENT(IN) :: lafin !true if last step
	73	REAL, DIMENSION(klon), INTENT(IN) :: rlon, rlat
	74	REAL, DIMENSION(klon), INTENT(IN) :: rmu0
	75	REAL, DIMENSION(klon), INTENT(IN) :: lwdownm !ylwdown
	76	REAL, DIMENSION(klon), INTENT(IN) :: albedo !mean albedo
	77	REAL, DIMENSION(klon), INTENT(IN) :: pphi1
[3900]	78	REAL, DIMENSION(klon), INTENT(IN) :: alt !mean altitude of the grid box
[1865]	79	REAL, DIMENSION(klon), INTENT(IN) :: slope !mean slope in grid box
	80	REAL, DIMENSION(klon), INTENT(IN) :: cloudf !total cloud fraction
	81
[781]	82	! In/Output variables
	83	!****************************************************************************************
	84	REAL, DIMENSION(klon), INTENT(INOUT) :: snow, qsol
	85	REAL, DIMENSION(klon), INTENT(INOUT) :: agesno
	86	REAL, DIMENSION(klon, nsoilmx), INTENT(INOUT) :: tsoil
	87
	88	! Output variables
	89	!****************************************************************************************
	90	REAL, DIMENSION(klon), INTENT(OUT) :: qsurf
[2243]	91	REAL, DIMENSION(klon), INTENT(OUT) :: z0m, z0h
[2227]	92	!albedo SB >>>
	93	! REAL, DIMENSION(klon), INTENT(OUT) :: alb1 ! new albedo in visible SW interval
	94	! REAL, DIMENSION(klon), INTENT(OUT) :: alb2 ! new albedo in near IR interval
[3792]	95	REAL, DIMENSION(6), INTENT(IN) :: SFRWL
	96	REAL, DIMENSION(klon,nsw), INTENT(OUT) :: alb_dir,alb_dif
[2227]	97	!albedo SB <<<
[781]	98	REAL, DIMENSION(klon), INTENT(OUT) :: evap, fluxsens, fluxlat
[4523]	99	REAL, DIMENSION(klon), INTENT(OUT) :: fluxbs
[888]	100	REAL, DIMENSION(klon), INTENT(OUT) :: tsurf_new
[781]	101	REAL, DIMENSION(klon), INTENT(OUT) :: dflux_s, dflux_l
[1067]	102	REAL, DIMENSION(klon), INTENT(OUT) :: flux_u1, flux_v1
[781]	103
[1865]	104	REAL, DIMENSION(klon), INTENT(OUT) :: alb3
	105	REAL, DIMENSION(klon), INTENT(OUT) :: qsnow !column water in snow [kg/m2]
	106	REAL, DIMENSION(klon), INTENT(OUT) :: snowhgt !Snow height (m)
	107	REAL, DIMENSION(klon), INTENT(OUT) :: to_ice
	108	REAL, DIMENSION(klon), INTENT(OUT) :: sissnow
	109	REAL, DIMENSION(klon), INTENT(OUT) :: runoff !Land ice runoff
	110
	111
[781]	112	! Local variables
	113	!****************************************************************************************
	114	REAL, DIMENSION(klon) :: soilcap, soilflux
	115	REAL, DIMENSION(klon) :: cal, beta, dif_grnd
	116	REAL, DIMENSION(klon) :: zfra, alb_neig
[888]	117	REAL, DIMENSION(klon) :: radsol
[3792]	118	REAL, DIMENSION(klon) :: u0, v0, u1_lay, v1_lay, ustar
	119	INTEGER :: i,j,nt
[3900]	120	REAL, DIMENSION(klon) :: fqfonte,ffonte
[4283]	121	REAL, DIMENSION(klon) :: run_off_lic_frac
[1865]	122	REAL, DIMENSION(klon) :: emis_new !Emissivity
	123	REAL, DIMENSION(klon) :: swdown,lwdown
[3900]	124	REAL, DIMENSION(klon) :: precip_snow_adv, snow_adv !Snow Drift precip./advection (not used in inlandsis)
	125	REAL, DIMENSION(klon) :: erod !erosion of surface snow (flux, kg/m2/s like evap)
	126	REAL, DIMENSION(klon) :: zsl_height, wind_velo !surface layer height, wind spd
[1865]	127	REAL, DIMENSION(klon) :: dens_air, snow_cont_air !air density; snow content air
	128	REAL, DIMENSION(klon) :: alb_soil !albedo of underlying ice
	129	REAL, DIMENSION(klon) :: pexner !Exner potential
	130	REAL :: pref
[3792]	131	REAL, DIMENSION(klon,nsoilmx) :: tsoil0 !modif
	132	REAL :: dtis ! subtimestep
	133	LOGICAL :: debut_is, lafin_is ! debut and lafin for inlandsis
[1865]	134
	135	CHARACTER (len = 20) :: modname = 'surf_landice'
	136	CHARACTER (len = 80) :: abort_message
	137
[2728]	138
[3900]	139	REAL,DIMENSION(klon) :: alb1,alb2
[4523]	140	REAL,DIMENSION(klon) :: precip_totsnow, evap_totsnow
[3900]	141	REAL, DIMENSION (klon,6) :: alb6
[4529]	142	REAL :: rho0, rhoice, ustart0, hsalt, esalt, rhod
	143	REAL :: lambdasalt,fluxsalt, csalt, nunu, aa, bb, cc
[4523]	144	REAL :: tau_dens, tau_dens0, tau_densmin, rhomax, rhohard
[4529]	145	REAL, DIMENSION(klon) :: ws1, rhos, ustart, qsalt
[781]	146	! End definition
	147	!****************************************************************************************
[2728]	148	!FC
	149	!FC
	150	REAL,SAVE :: alb_vis_sno_lic
	151	!$OMP THREADPRIVATE(alb_vis_sno_lic)
	152	REAL,SAVE :: alb_nir_sno_lic
	153	!$OMP THREADPRIVATE(alb_nir_sno_lic)
	154	LOGICAL, SAVE :: firstcall = .TRUE.
	155	!$OMP THREADPRIVATE(firstcall)
	156
	157
[3792]	158	!FC firtscall initializations
	159	!******************************************************************************************
[2728]	160	IF (firstcall) THEN
	161	alb_vis_sno_lic=0.77
	162	CALL getin_p('alb_vis_sno_lic',alb_vis_sno_lic)
	163	PRINT*, 'alb_vis_sno_lic',alb_vis_sno_lic
	164	alb_nir_sno_lic=0.77
	165	CALL getin_p('alb_nir_sno_lic',alb_nir_sno_lic)
	166	PRINT*, 'alb_nir_sno_lic',alb_nir_sno_lic
[3792]	167
[2728]	168	firstcall=.false.
	169	ENDIF
[3792]	170	!******************************************************************************************
	171
[781]	172	! Initialize output variables
[1865]	173	alb3(:) = 999999.
[888]	174	alb2(:) = 999999.
	175	alb1(:) = 999999.
[4523]	176	fluxbs(:)=0.
[1865]	177	runoff(:) = 0.
[888]	178	!****************************************************************************************
	179	! Calculate total absorbed radiance at surface
	180	!
	181	!****************************************************************************************
	182	radsol(:) = 0.0
	183	radsol(1:knon) = swnet(1:knon) + lwnet(1:knon)
[781]	184
	185	!****************************************************************************************
[4523]	186
	187	!****************************************************************************************
[3792]	188	! landice_opt = 0 : soil_model, calcul_flux, fonte_neige, ...
[3901]	189	! landice_opt = 1 : prepare and call INterace Lmdz SISvat (INLANDSIS)
[1865]	190	!****************************************************************************************
[3792]	191
	192
	193	IF (landice_opt .EQ. 1) THEN
	194
[3901]	195	!****************************************************************************************
[3792]	196	! CALL to INLANDSIS interface
	197	!****************************************************************************************
	198	#ifdef CPP_INLANDSIS
	199
	200	debut_is=debut
	201	lafin_is=.false.
	202	! Suppose zero surface speed
	203	u0(:) = 0.0
	204	v0(:) = 0.0
	205
	206
	207	CALL calcul_flux_wind(knon, dtime, &
	208	u0, v0, u1, v1, gustiness, cdragm, &
	209	AcoefU, AcoefV, BcoefU, BcoefV, &
	210	p1lay, temp_air, &
	211	flux_u1, flux_v1)
	212
	213
	214	! Set constants and compute some input for SISVAT
	215	! = 1000 hPa
	216	! and calculate incoming flux for SW and LW interval: swdown, lwdown
	217	swdown(:) = 0.0
	218	lwdown(:) = 0.0
[3900]	219	snow_cont_air(:) = 0. ! the snow content in air is not a prognostic variable of the model
[3792]	220	alb_soil(:) = 0.4 ! before albedo(:) but here it is the ice albedo that we have to set
	221	ustar(:) = 0.
	222	pref = 100000.
	223	DO i = 1, knon
	224	swdown(i) = swnet(i)/(1-albedo(i))
	225	lwdown(i) = lwdownm(i)
	226	wind_velo(i) = u1(i)2 + v1(i)2
	227	wind_velo(i) = wind_velo(i)**0.5
	228	pexner(i) = (p1lay(i)/pref)**(RD/RCPD)
	229	dens_air(i) = p1lay(i)/RD/temp_air(i) ! dry air density
	230	zsl_height(i) = pphi1(i)/RG
	231	tsoil0(i,:) = tsoil(i,:)
	232	ustar(i)= (cdragm(i)(wind_velo(i)2))*0.5
	233	END DO
	234
	235
	236
[3900]	237	dtis=dtime
[3792]	238
[3900]	239	IF (lafin) THEN
[3792]	240	lafin_is=.true.
	241	END IF
	242
[3900]	243	CALL surf_inlandsis(knon, rlon, rlat, knindex, itime, dtis, debut_is, lafin_is,&
	244	rmu0, swdown, lwdown, albedo, pexner, ps, p1lay, precip_rain, precip_snow, &
	245	zsl_height, wind_velo, ustar, temp_air, dens_air, spechum, tsurf,&
	246	rugoro, snow_cont_air, alb_soil, alt, slope, cloudf, &
	247	radsol, qsol, tsoil0, snow, zfra, snowhgt, qsnow, to_ice, sissnow,agesno, &
[3792]	248	AcoefH, AcoefQ, BcoefH, BcoefQ, cdragm, cdragh, &
[3900]	249	run_off_lic, fqfonte, ffonte, evap, erod, fluxsens, fluxlat,dflux_s, dflux_l, &
	250	tsurf_new, alb1, alb2, alb3, alb6, &
	251	emis_new, z0m, z0h, qsurf)
[3792]	252
[3900]	253	debut_is=.false.
[3792]	254
	255
[3900]	256	! Treatment of snow melting and calving
[3792]	257
[3900]	258	! for consistency with standard LMDZ, add calving to run_off_lic
	259	run_off_lic(:)=run_off_lic(:) + to_ice(:)
	260
	261	DO i = 1, knon
	262	ffonte_global(knindex(i),is_lic) = ffonte(i)
	263	fqfonte_global(knindex(i),is_lic) = fqfonte(i)! net melting= melting - refreezing
	264	fqcalving_global(knindex(i),is_lic) = to_ice(i) ! flux
	265	runofflic_global(knindex(i)) = run_off_lic(i)
	266	ENDDO
	267	! Here, we assume that the calving term is equal to the to_ice term
	268	! (no ice accumulation)
	269
	270
[3792]	271	#else
[3901]	272	abort_message='Pb de coherence: landice_opt = 1 mais CPP_INLANDSIS = .false.'
[3792]	273	CALL abort_physic(modname,abort_message,1)
	274	#endif
	275
	276
	277	ELSE
	278
	279	!****************************************************************************************
[781]	280	! Soil calculations
	281	!
	282	!****************************************************************************************
[3780]	283
	284	! EV: use calbeta
	285	CALL calbeta(dtime, is_lic, knon, snow, qsol, beta, cal, dif_grnd)
	286
	287
	288	! use soil model and recalculate properly cal
[781]	289	IF (soil_model) THEN
[3974]	290	CALL soil(dtime, is_lic, knon, snow, tsurf, qsol, &
	291	& longitude(knindex(1:knon)), latitude(knindex(1:knon)), tsoil, soilcap, soilflux)
[781]	292	cal(1:knon) = RCPD / soilcap(1:knon)
	293	radsol(1:knon) = radsol(1:knon) + soilflux(1:knon)
	294	ELSE
	295	cal = RCPD * calice
	296	WHERE (snow > 0.0) cal = RCPD * calsno
	297	ENDIF
	298
	299
	300	!****************************************************************************************
	301	! Calulate fluxes
	302	!
	303	!****************************************************************************************
[3792]	304	! beta(:) = 1.0
	305	! dif_grnd(:) = 0.0
[781]	306
[1067]	307	! Suppose zero surface speed
	308	u0(:)=0.0
	309	v0(:)=0.0
	310	u1_lay(:) = u1(:) - u0(:)
	311	v1_lay(:) = v1(:) - v0(:)
	312
[781]	313	CALL calcul_fluxs(knon, is_lic, dtime, &
[2254]	314	tsurf, p1lay, cal, beta, cdragh, cdragh, ps, &
[781]	315	precip_rain, precip_snow, snow, qsurf, &
[2240]	316	radsol, dif_grnd, temp_air, spechum, u1_lay, v1_lay, gustiness, &
[2254]	317	1.,AcoefH, AcoefQ, BcoefH, BcoefQ, &
[781]	318	tsurf_new, evap, fluxlat, fluxsens, dflux_s, dflux_l)
	319
[1067]	320	CALL calcul_flux_wind(knon, dtime, &
[2240]	321	u0, v0, u1, v1, gustiness, cdragm, &
[1067]	322	AcoefU, AcoefV, BcoefU, BcoefV, &
	323	p1lay, temp_air, &
	324	flux_u1, flux_v1)
[781]	325
	326
	327	!****************************************************************************************
	328	! Calculate albedo
	329	!
	330	!****************************************************************************************
[4523]	331
[781]	332	CALL albsno(klon,knon,dtime,agesno(:),alb_neig(:), precip_snow(:))
[3780]	333
[4523]	334
	335	! EV: following lines are obsolete since we set alb1 and alb2 to constant values
	336	! I therefore comment them
	337	! alb1(1:knon) = alb_neig(1:knon)*zfra(1:knon) + &
	338	! 0.6 * (1.0-zfra(1:knon))
[781]	339	!
	340	!IM: plusieurs choix/tests sur l'albedo des "glaciers continentaux"
[888]	341	! alb1(1 : knon) = 0.6 !IM cf FH/GK
	342	! alb1(1 : knon) = 0.82
	343	! alb1(1 : knon) = 0.77 !211003 Ksta0.77
	344	! alb1(1 : knon) = 0.8 !KstaTER0.8 & LMD_ARMIP5
[781]	345	!IM: KstaTER0.77 & LMD_ARMIP6
	346
[3780]	347	! Attantion: alb1 and alb2 are not the same!
[2728]	348	alb1(1:knon) = alb_vis_sno_lic
	349	alb2(1:knon) = alb_nir_sno_lic
[781]	350
	351
	352	!****************************************************************************************
	353	! Rugosity
	354	!
	355	!****************************************************************************************
[4245]	356	z0m = z0m_landice
	357	z0h = z0h_landice
	358	!z0m = SQRT(z0m2+rugoro2)
[2243]	359
[781]	360
[1865]	361
[4523]	362	! Simple blowing snow param
	363	if (ok_bs) then
	364	ustart0 = 0.211
	365	rhoice = 920.0
	366	rho0 = 200.0
	367	rhomax=450.0
	368	rhohard=400.0
	369	tau_dens0=86400.0*10. ! 10 days by default, in s
	370	tau_densmin=86400.0 ! 1 days according to in situ obs by C. Amory
[4529]	371
	372	! computation of threshold friction velocity
	373	! which depends on surface snow density
[4523]	374	do i = 1, knon
	375	! estimation of snow density
	376	! snow density increases with snow age and
	377	! increases even faster in case of sedimentation of blowing snow
	378	tau_dens=max(tau_densmin, tau_dens0*exp(-abs(precip_bs(i))/pbst_bs-abs(precip_rain(i))/prt_bs))
	379	rhos(i)=rho0+(rhohard-rho0)(1.-exp(-agesno(i)86400.0/tau_dens))
	380	! blowing snow flux formula used in MAR
	381	ws1(i)=(u1(i)2+v1(i)2)**0.5
	382	ustar(i)=(cdragm(i)(u1(i)2+v1(i)2))*0.5
	383	ustart(i)=ustart0exp(max(rhoice/rho0-rhoice/rhos(i),0.))exp(max(0.,rhos(i)-rhomax))
	384	! we have multiplied by exp to prevent erosion when rhos>rhomax (usefull till
	385	! rhohard<450)
	386	enddo
[4529]	387
	388	! computation of qbs at the top of the saltation layer
	389	! two formulations possible
	390	! pay attention that qbs is a mixing ratio and has to be converted
	391	! to specific content
	392
	393	if (iflag_saltation_bs .eq. 1) then
	394	! expression from CRYOWRF (Sharma et al. 2022)
	395	aa=2.6
	396	bb=2.5
	397	cc=2.0
	398	lambdasalt=0.45
	399	do i =1, knon
	400	rhod=p1lay(i)/RD/temp_air(i)
	401	nunu=max(ustar(i)/ustart(i),1.e-3)
	402	fluxsalt=rhod/RG(ustar(i)3)(1.-nunu*(-2)) &
	403	(aa+bbnunu(-2)+ccnunu**(-1))
	404	csalt=fluxsalt/(2.8*ustart(i))
	405	hsalt=0.08436ustar(i)*1.27
	406	qsalt(i)=1./rhodcsaltlambdasaltRG/(max(ustar(i)*2,1E-6)) &
	407	* exp(-lambdasaltRGhsalt/max(ustar(i)**2,1E-6))
	408	qsalt(i)=max(qsalt(i),0.)
	409	enddo
[4523]	410
[4529]	411
	412	else
	413	! default formulation from MAR model (Amory et al. 2021, Gallee et al. 2001)
	414	do i=1, knon
	415	esalt=1./(3.25*max(ustar(i),0.001))
	416	hsalt=0.08436ustar(i)*1.27
	417	qsalt(i)=(max(ustar(i)2-ustart(i)2,0.))/(RGhsalt)esalt
	418	!ep=qsaltcdragm(i)sqrt(u1(i)2+v1(i)2)
	419	enddo
	420	endif
	421
	422	! calculation of erosion (emission flux towards the first atmospheric level)
	423	! consistent with implicit resolution of turbulent mixing equation
	424	do i=1, knon
	425	rhod=p1lay(i)/RD/temp_air(i)
	426	fluxbs(i)=rhodws1(i)cdragm(i)zeta_bs(AcoefQBS(i)-qsalt(i)) &
[4538]	427	/ (1.-rhodws1(i)zeta_bscdragm(i)BcoefQBS(i)*dtime)
[4529]	428	!fluxbs(i)= zeta_bsrhodws1(i)cdragm(i)(qbs1(i)-qsalt(i))
	429	enddo
	430
[4523]	431	! for outputs
	432	do j = 1, knon
	433	i = knindex(j)
	434	zxustartlic(i) = ustart(j)
	435	zxrhoslic(i) = rhos(j)
	436	enddo
	437
	438	endif
	439
	440
	441
	442	!****************************************************************************************
	443	! Calculate surface snow amount
	444	!
	445	!****************************************************************************************
	446	IF (ok_bs) THEN
[4526]	447	precip_totsnow(:)=precip_snow(:)+precip_bs(:)
	448	evap_totsnow(:)=evap(:)-fluxbs(:) ! flux bs is positive towards the surface (snow erosion)
[4523]	449	ELSE
[4526]	450	precip_totsnow(:)=precip_snow(:)
	451	evap_totsnow(:)=evap(:)
[4523]	452	ENDIF
	453
	454	CALL fonte_neige(knon, is_lic, knindex, dtime, &
	455	tsurf, precip_rain, precip_totsnow, &
	456	snow, qsol, tsurf_new, evap_totsnow)
	457
	458	WHERE (snow(1 : knon) .LT. 0.0001) agesno(1 : knon) = 0.
	459	zfra(1:knon) = MAX(0.0,MIN(1.0,snow(1:knon)/(snow(1:knon)+10.0)))
	460
	461
[3792]	462	END IF ! landice_opt
	463
	464
[781]	465	!****************************************************************************************
	466	! Send run-off on land-ice to coupler if coupled ocean.
[3903]	467	! run_off_lic has been calculated in fonte_neige or surf_inlandsis
[4283]	468	! If landice_opt>=2, corresponding call is done from surf_land_orchidee
[781]	469	!****************************************************************************************
[4283]	470	IF (type_ocean=='couple' .AND. landice_opt .LT. 2) THEN
	471	! Compress fraction where run_off_lic is active (here all pctsrf(is_lic))
	472	run_off_lic_frac(:)=0.0
	473	DO j = 1, knon
	474	i = knindex(j)
	475	run_off_lic_frac(j) = pctsrf(i,is_lic)
	476	ENDDO
	477
	478	CALL cpl_send_landice_fields(itime, knon, knindex, run_off_lic, run_off_lic_frac)
[781]	479	ENDIF
[1865]	480
	481	! transfer runoff rate [kg/m2/s](!) to physiq for output
	482	runoff(1:knon)=run_off_lic(1:knon)/dtime
	483
[1403]	484	snow_o=0.
	485	zfra_o = 0.
	486	DO j = 1, knon
	487	i = knindex(j)
	488	snow_o(i) = snow(j)
	489	zfra_o(i) = zfra(j)
	490	ENDDO
	491
	492
[2227]	493	!albedo SB >>>
	494	select case(NSW)
	495	case(2)
	496	alb_dir(1:knon,1)=alb1(1:knon)
	497	alb_dir(1:knon,2)=alb2(1:knon)
	498	case(4)
	499	alb_dir(1:knon,1)=alb1(1:knon)
	500	alb_dir(1:knon,2)=alb2(1:knon)
	501	alb_dir(1:knon,3)=alb2(1:knon)
	502	alb_dir(1:knon,4)=alb2(1:knon)
	503	case(6)
	504	alb_dir(1:knon,1)=alb1(1:knon)
	505	alb_dir(1:knon,2)=alb1(1:knon)
	506	alb_dir(1:knon,3)=alb1(1:knon)
	507	alb_dir(1:knon,4)=alb2(1:knon)
	508	alb_dir(1:knon,5)=alb2(1:knon)
	509	alb_dir(1:knon,6)=alb2(1:knon)
[3900]	510
[3901]	511	IF ((landice_opt .EQ. 1) .AND. (iflag_albcalc .EQ. 2)) THEN
[3900]	512	alb_dir(1:knon,1)=alb6(1:knon,1)
	513	alb_dir(1:knon,2)=alb6(1:knon,2)
	514	alb_dir(1:knon,3)=alb6(1:knon,3)
	515	alb_dir(1:knon,4)=alb6(1:knon,4)
	516	alb_dir(1:knon,5)=alb6(1:knon,5)
	517	alb_dir(1:knon,6)=alb6(1:knon,6)
	518	ENDIF
	519
[2227]	520	end select
	521	alb_dif=alb_dir
	522	!albedo SB <<<
	523
	524
[781]	525	END SUBROUTINE surf_landice
	526	!
	527	!****************************************************************************************
	528	!
	529	END MODULE surf_landice_mod
	530
	531
	532

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