Context Navigation

← Previous Revision
Next Revision →
Normal
Revision Log

surf_landice_mod.F90

Last change on this file was 4743, checked in by Laurent Fairhead, 8 months ago
Merge of ACC branch with 4740 revision from trunk
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: 21.2 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, &
[4584]	14	cdragh, cdragm, precip_rain, precip_snow, precip_bs, temp_air, spechum, &
[1067]	15	AcoefH, AcoefQ, BcoefH, BcoefQ, &
	16	AcoefU, AcoefV, BcoefU, BcoefV, &
[4584]	17	AcoefQBS, BcoefQBS, &
[2240]	18	ps, u1, v1, gustiness, rugoro, pctsrf, &
[4584]	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
[4584]	33	USE phys_local_var_mod, ONLY : zxrhoslic, zxustartlic
[4446]	34	USE phys_output_var_mod, ONLY : snow_o,zfra_o
[2728]	35	!FC
	36	USE ioipsl_getin_p_mod, ONLY : getin_p
[4743]	37	USE lmdz_blowing_snow_ini, 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
[4584]	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
[4584]	65	REAL, DIMENSION(klon), INTENT(IN) :: AcoefQBS, BcoefQBS
[781]	66	REAL, DIMENSION(klon), INTENT(IN) :: ps
[4584]	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
[4584]	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
[4446]	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
[4584]	140	REAL,DIMENSION(klon) :: precip_totsnow, evap_totsnow
[3900]	141	REAL, DIMENSION (klon,6) :: alb6
[4743]	142	REAL :: rho0, rhoice, ustart0,esalt, rhod
[4584]	143	REAL :: lambdasalt,fluxsalt, csalt, nunu, aa, bb, cc
	144	REAL :: tau_dens, tau_dens0, tau_densmin, rhomax, rhohard
[4743]	145	REAL, DIMENSION(klon) :: ws1, rhos, ustart, qsalt, hsalt, snowini
	146	REAL :: maxerosion ! in kg/s
	147
[781]	148	! End definition
	149	!****************************************************************************************
[2728]	150	!FC
	151	!FC
	152	REAL,SAVE :: alb_vis_sno_lic
	153	!$OMP THREADPRIVATE(alb_vis_sno_lic)
	154	REAL,SAVE :: alb_nir_sno_lic
	155	!$OMP THREADPRIVATE(alb_nir_sno_lic)
	156	LOGICAL, SAVE :: firstcall = .TRUE.
	157	!$OMP THREADPRIVATE(firstcall)
	158
	159
[3792]	160	!FC firtscall initializations
	161	!******************************************************************************************
[2728]	162	IF (firstcall) THEN
	163	alb_vis_sno_lic=0.77
	164	CALL getin_p('alb_vis_sno_lic',alb_vis_sno_lic)
	165	PRINT*, 'alb_vis_sno_lic',alb_vis_sno_lic
	166	alb_nir_sno_lic=0.77
	167	CALL getin_p('alb_nir_sno_lic',alb_nir_sno_lic)
	168	PRINT*, 'alb_nir_sno_lic',alb_nir_sno_lic
[3792]	169
[2728]	170	firstcall=.false.
	171	ENDIF
[3792]	172	!******************************************************************************************
	173
[781]	174	! Initialize output variables
[1865]	175	alb3(:) = 999999.
[888]	176	alb2(:) = 999999.
	177	alb1(:) = 999999.
[4584]	178	fluxbs(:)=0.
[1865]	179	runoff(:) = 0.
[888]	180	!****************************************************************************************
	181	! Calculate total absorbed radiance at surface
	182	!
	183	!****************************************************************************************
	184	radsol(:) = 0.0
	185	radsol(1:knon) = swnet(1:knon) + lwnet(1:knon)
[781]	186
	187	!****************************************************************************************
[4584]	188
	189	!****************************************************************************************
[3792]	190	! landice_opt = 0 : soil_model, calcul_flux, fonte_neige, ...
[3901]	191	! landice_opt = 1 : prepare and call INterace Lmdz SISvat (INLANDSIS)
[1865]	192	!****************************************************************************************
[3792]	193
	194
	195	IF (landice_opt .EQ. 1) THEN
	196
[3901]	197	!****************************************************************************************
[3792]	198	! CALL to INLANDSIS interface
	199	!****************************************************************************************
	200	#ifdef CPP_INLANDSIS
	201
	202	debut_is=debut
	203	lafin_is=.false.
	204	! Suppose zero surface speed
	205	u0(:) = 0.0
	206	v0(:) = 0.0
	207
	208
	209	CALL calcul_flux_wind(knon, dtime, &
	210	u0, v0, u1, v1, gustiness, cdragm, &
	211	AcoefU, AcoefV, BcoefU, BcoefV, &
	212	p1lay, temp_air, &
	213	flux_u1, flux_v1)
	214
	215
	216	! Set constants and compute some input for SISVAT
	217	! = 1000 hPa
	218	! and calculate incoming flux for SW and LW interval: swdown, lwdown
	219	swdown(:) = 0.0
	220	lwdown(:) = 0.0
[3900]	221	snow_cont_air(:) = 0. ! the snow content in air is not a prognostic variable of the model
[3792]	222	alb_soil(:) = 0.4 ! before albedo(:) but here it is the ice albedo that we have to set
	223	ustar(:) = 0.
	224	pref = 100000.
	225	DO i = 1, knon
	226	swdown(i) = swnet(i)/(1-albedo(i))
	227	lwdown(i) = lwdownm(i)
	228	wind_velo(i) = u1(i)2 + v1(i)2
	229	wind_velo(i) = wind_velo(i)**0.5
	230	pexner(i) = (p1lay(i)/pref)**(RD/RCPD)
	231	dens_air(i) = p1lay(i)/RD/temp_air(i) ! dry air density
	232	zsl_height(i) = pphi1(i)/RG
	233	tsoil0(i,:) = tsoil(i,:)
	234	ustar(i)= (cdragm(i)(wind_velo(i)2))*0.5
	235	END DO
	236
	237
	238
[3900]	239	dtis=dtime
[3792]	240
[3900]	241	IF (lafin) THEN
[3792]	242	lafin_is=.true.
	243	END IF
	244
[3900]	245	CALL surf_inlandsis(knon, rlon, rlat, knindex, itime, dtis, debut_is, lafin_is,&
	246	rmu0, swdown, lwdown, albedo, pexner, ps, p1lay, precip_rain, precip_snow, &
	247	zsl_height, wind_velo, ustar, temp_air, dens_air, spechum, tsurf,&
	248	rugoro, snow_cont_air, alb_soil, alt, slope, cloudf, &
	249	radsol, qsol, tsoil0, snow, zfra, snowhgt, qsnow, to_ice, sissnow,agesno, &
[3792]	250	AcoefH, AcoefQ, BcoefH, BcoefQ, cdragm, cdragh, &
[3900]	251	run_off_lic, fqfonte, ffonte, evap, erod, fluxsens, fluxlat,dflux_s, dflux_l, &
	252	tsurf_new, alb1, alb2, alb3, alb6, &
	253	emis_new, z0m, z0h, qsurf)
[3792]	254
[3900]	255	debut_is=.false.
[3792]	256
	257
[3900]	258	! Treatment of snow melting and calving
[3792]	259
[3900]	260	! for consistency with standard LMDZ, add calving to run_off_lic
	261	run_off_lic(:)=run_off_lic(:) + to_ice(:)
	262
	263	DO i = 1, knon
	264	ffonte_global(knindex(i),is_lic) = ffonte(i)
	265	fqfonte_global(knindex(i),is_lic) = fqfonte(i)! net melting= melting - refreezing
	266	fqcalving_global(knindex(i),is_lic) = to_ice(i) ! flux
	267	runofflic_global(knindex(i)) = run_off_lic(i)
	268	ENDDO
	269	! Here, we assume that the calving term is equal to the to_ice term
	270	! (no ice accumulation)
	271
	272
[3792]	273	#else
[3901]	274	abort_message='Pb de coherence: landice_opt = 1 mais CPP_INLANDSIS = .false.'
[3792]	275	CALL abort_physic(modname,abort_message,1)
	276	#endif
	277
	278
	279	ELSE
	280
	281	!****************************************************************************************
[781]	282	! Soil calculations
	283	!
	284	!****************************************************************************************
[3780]	285
	286	! EV: use calbeta
	287	CALL calbeta(dtime, is_lic, knon, snow, qsol, beta, cal, dif_grnd)
	288
	289
	290	! use soil model and recalculate properly cal
[781]	291	IF (soil_model) THEN
[3974]	292	CALL soil(dtime, is_lic, knon, snow, tsurf, qsol, &
	293	& longitude(knindex(1:knon)), latitude(knindex(1:knon)), tsoil, soilcap, soilflux)
[781]	294	cal(1:knon) = RCPD / soilcap(1:knon)
	295	radsol(1:knon) = radsol(1:knon) + soilflux(1:knon)
	296	ELSE
	297	cal = RCPD * calice
	298	WHERE (snow > 0.0) cal = RCPD * calsno
	299	ENDIF
	300
	301
	302	!****************************************************************************************
	303	! Calulate fluxes
	304	!
	305	!****************************************************************************************
[3792]	306	! beta(:) = 1.0
	307	! dif_grnd(:) = 0.0
[781]	308
[1067]	309	! Suppose zero surface speed
	310	u0(:)=0.0
	311	v0(:)=0.0
	312	u1_lay(:) = u1(:) - u0(:)
	313	v1_lay(:) = v1(:) - v0(:)
	314
[781]	315	CALL calcul_fluxs(knon, is_lic, dtime, &
[2254]	316	tsurf, p1lay, cal, beta, cdragh, cdragh, ps, &
[781]	317	precip_rain, precip_snow, snow, qsurf, &
[2240]	318	radsol, dif_grnd, temp_air, spechum, u1_lay, v1_lay, gustiness, &
[2254]	319	1.,AcoefH, AcoefQ, BcoefH, BcoefQ, &
[781]	320	tsurf_new, evap, fluxlat, fluxsens, dflux_s, dflux_l)
	321
[1067]	322	CALL calcul_flux_wind(knon, dtime, &
[2240]	323	u0, v0, u1, v1, gustiness, cdragm, &
[1067]	324	AcoefU, AcoefV, BcoefU, BcoefV, &
	325	p1lay, temp_air, &
	326	flux_u1, flux_v1)
[781]	327
	328
	329	!****************************************************************************************
	330	! Calculate albedo
	331	!
	332	!****************************************************************************************
[4584]	333
[781]	334	CALL albsno(klon,knon,dtime,agesno(:),alb_neig(:), precip_snow(:))
[3780]	335
[4584]	336
	337	! EV: following lines are obsolete since we set alb1 and alb2 to constant values
	338	! I therefore comment them
	339	! alb1(1:knon) = alb_neig(1:knon)*zfra(1:knon) + &
	340	! 0.6 * (1.0-zfra(1:knon))
[781]	341	!
	342	!IM: plusieurs choix/tests sur l'albedo des "glaciers continentaux"
[888]	343	! alb1(1 : knon) = 0.6 !IM cf FH/GK
	344	! alb1(1 : knon) = 0.82
	345	! alb1(1 : knon) = 0.77 !211003 Ksta0.77
	346	! alb1(1 : knon) = 0.8 !KstaTER0.8 & LMD_ARMIP5
[781]	347	!IM: KstaTER0.77 & LMD_ARMIP6
	348
[3780]	349	! Attantion: alb1 and alb2 are not the same!
[2728]	350	alb1(1:knon) = alb_vis_sno_lic
	351	alb2(1:knon) = alb_nir_sno_lic
[781]	352
	353
	354	!****************************************************************************************
	355	! Rugosity
	356	!
	357	!****************************************************************************************
[4446]	358	z0m = z0m_landice
	359	z0h = z0h_landice
	360	!z0m = SQRT(z0m2+rugoro2)
[2243]	361
[781]	362
[1865]	363
[4584]	364	! Simple blowing snow param
	365	if (ok_bs) then
	366	ustart0 = 0.211
	367	rhoice = 920.0
[4743]	368	rho0 = 300.0
[4584]	369	rhomax=450.0
[4743]	370	rhohard=450.0
[4584]	371	tau_dens0=86400.0*10. ! 10 days by default, in s
[4743]	372	tau_densmin=21600.0 ! 1/4 days according to in situ obs by C. Amory during blowing snow +
	373	! Marshall et al. 1999 (snow densification during rain)
[4584]	374
	375	! computation of threshold friction velocity
	376	! which depends on surface snow density
[4743]	377	do j = 1, knon
[4584]	378	! estimation of snow density
	379	! snow density increases with snow age and
[4743]	380	! increases even faster in case of sedimentation of blowing snow or rain
	381	tau_dens=max(tau_densmin, tau_dens0*exp(-abs(precip_bs(j))/pbst_bs - &
	382	abs(precip_rain(j))/prt_bs)*exp(-max(tsurf(j)-272.0,0.)))
	383	rhos(j)=rho0+(rhohard-rho0)(1.-exp(-agesno(j)86400.0/tau_dens))
[4584]	384	! blowing snow flux formula used in MAR
[4743]	385	ws1(j)=(u1(j)2+v1(j)2)**0.5
	386	ustar(j)=(cdragm(j)(u1(j)2+v1(j)2))*0.5
	387	ustart(j)=ustart0exp(max(rhoice/rho0-rhoice/rhos(j),0.))exp(max(0.,rhos(j)-rhomax))
[4584]	388	! we have multiplied by exp to prevent erosion when rhos>rhomax (usefull till
	389	! rhohard<450)
	390	enddo
	391
	392	! computation of qbs at the top of the saltation layer
	393	! two formulations possible
	394	! pay attention that qbs is a mixing ratio and has to be converted
	395	! to specific content
	396
	397	if (iflag_saltation_bs .eq. 1) then
	398	! expression from CRYOWRF (Sharma et al. 2022)
	399	aa=2.6
	400	bb=2.5
	401	cc=2.0
	402	lambdasalt=0.45
[4743]	403	do j =1, knon
	404	rhod=p1lay(j)/RD/temp_air(j)
	405	nunu=max(ustar(j)/ustart(j),1.e-3)
	406	fluxsalt=rhod/RG(ustar(j)3)(1.-nunu*(-2)) &
[4584]	407	(aa+bbnunu(-2)+ccnunu**(-1))
[4743]	408	csalt=fluxsalt/(2.8*ustart(j))
	409	hsalt(j)=0.08436ustar(j)*1.27
	410	qsalt(j)=1./rhodcsaltlambdasaltRG/(max(ustar(j)*2,1E-6)) &
	411	* exp(-lambdasaltRGhsalt(j)/max(ustar(j)**2,1E-6))
	412	qsalt(j)=max(qsalt(j),0.)
[4584]	413	enddo
	414
	415
	416	else
	417	! default formulation from MAR model (Amory et al. 2021, Gallee et al. 2001)
[4743]	418	do j=1, knon
	419	esalt=1./(3.25*max(ustar(j),0.001))
	420	hsalt(j)=0.08436ustar(j)*1.27
	421	qsalt(j)=(max(ustar(j)2-ustart(j)2,0.))/(RGhsalt(j))esalt
	422	!ep=qsaltcdragm(j)sqrt(u1(j)2+v1(j)2)
[4584]	423	enddo
	424	endif
	425
[4743]	426	! calculation of erosion (flux positive towards the surface here)
[4584]	427	! consistent with implicit resolution of turbulent mixing equation
[4743]	428	do j=1, knon
	429	i = knindex(j)
	430	rhod=p1lay(j)/RD/temp_air(j)
	431	! Nemoto and Nishimura 2004 show that steady-state saltation is achieved within an interval of about 10s
	432	! we thus prevent snowerosion (snow particle transfer from the saltation layer to the first model level)
	433	! to exceed (in intensity) integrated over 10s to exceed the total mass of snow particle in the saltation layer
	434	! (rhoqsalthsalt)
	435	maxerosion=hsalt(j)qsalt(j)rhod/10.
	436	fluxbs(j)=rhodws1(j)cdragm(j)*(AcoefQBS(j)-qsalt(j)) &
	437	/ (1.-rhodws1(j)cdragm(j)BcoefQBS(j)dtime)
	438	!fluxbs(j)= rhodws1(j)cdragm(j)*(qbs1(j)-qsalt(j))
	439	fluxbs(j)=max(-maxerosion,fluxbs(j))
[4584]	440
[4743]	441	! for outputs
	442
	443	zxustartlic(i) = ustart(j)
	444	zxrhoslic(i) = rhos(j)
[4584]	445	enddo
	446
	447	endif
	448
	449
	450
	451	!****************************************************************************************
[4743]	452	! Calculate snow amount
[4584]	453	!
	454	!****************************************************************************************
	455	IF (ok_bs) THEN
	456	precip_totsnow(:)=precip_snow(:)+precip_bs(:)
	457	evap_totsnow(:)=evap(:)-fluxbs(:) ! flux bs is positive towards the surface (snow erosion)
	458	ELSE
	459	precip_totsnow(:)=precip_snow(:)
	460	evap_totsnow(:)=evap(:)
	461	ENDIF
[4743]	462
	463
[4584]	464	CALL fonte_neige(knon, is_lic, knindex, dtime, &
	465	tsurf, precip_rain, precip_totsnow, &
	466	snow, qsol, tsurf_new, evap_totsnow)
[4743]	467
	468
[4584]	469	WHERE (snow(1 : knon) .LT. 0.0001) agesno(1 : knon) = 0.
	470	zfra(1:knon) = MAX(0.0,MIN(1.0,snow(1:knon)/(snow(1:knon)+10.0)))
	471
	472
[3792]	473	END IF ! landice_opt
	474
	475
[781]	476	!****************************************************************************************
	477	! Send run-off on land-ice to coupler if coupled ocean.
[3903]	478	! run_off_lic has been calculated in fonte_neige or surf_inlandsis
[4446]	479	! If landice_opt>=2, corresponding call is done from surf_land_orchidee
[781]	480	!****************************************************************************************
[4446]	481	IF (type_ocean=='couple' .AND. landice_opt .LT. 2) THEN
	482	! Compress fraction where run_off_lic is active (here all pctsrf(is_lic))
	483	run_off_lic_frac(:)=0.0
	484	DO j = 1, knon
	485	i = knindex(j)
	486	run_off_lic_frac(j) = pctsrf(i,is_lic)
	487	ENDDO
	488
	489	CALL cpl_send_landice_fields(itime, knon, knindex, run_off_lic, run_off_lic_frac)
[781]	490	ENDIF
[1865]	491
	492	! transfer runoff rate [kg/m2/s](!) to physiq for output
	493	runoff(1:knon)=run_off_lic(1:knon)/dtime
	494
[1403]	495	snow_o=0.
	496	zfra_o = 0.
	497	DO j = 1, knon
	498	i = knindex(j)
	499	snow_o(i) = snow(j)
	500	zfra_o(i) = zfra(j)
	501	ENDDO
	502
	503
[2227]	504	!albedo SB >>>
	505	select case(NSW)
	506	case(2)
	507	alb_dir(1:knon,1)=alb1(1:knon)
	508	alb_dir(1:knon,2)=alb2(1:knon)
	509	case(4)
	510	alb_dir(1:knon,1)=alb1(1:knon)
	511	alb_dir(1:knon,2)=alb2(1:knon)
	512	alb_dir(1:knon,3)=alb2(1:knon)
	513	alb_dir(1:knon,4)=alb2(1:knon)
	514	case(6)
	515	alb_dir(1:knon,1)=alb1(1:knon)
	516	alb_dir(1:knon,2)=alb1(1:knon)
	517	alb_dir(1:knon,3)=alb1(1:knon)
	518	alb_dir(1:knon,4)=alb2(1:knon)
	519	alb_dir(1:knon,5)=alb2(1:knon)
	520	alb_dir(1:knon,6)=alb2(1:knon)
[3900]	521
[3901]	522	IF ((landice_opt .EQ. 1) .AND. (iflag_albcalc .EQ. 2)) THEN
[3900]	523	alb_dir(1:knon,1)=alb6(1:knon,1)
	524	alb_dir(1:knon,2)=alb6(1:knon,2)
	525	alb_dir(1:knon,3)=alb6(1:knon,3)
	526	alb_dir(1:knon,4)=alb6(1:knon,4)
	527	alb_dir(1:knon,5)=alb6(1:knon,5)
	528	alb_dir(1:knon,6)=alb6(1:knon,6)
	529	ENDIF
	530
[2227]	531	end select
	532	alb_dif=alb_dir
	533	!albedo SB <<<
	534
	535
[781]	536	END SUBROUTINE surf_landice
	537	!
	538	!****************************************************************************************
	539	!
	540	END MODULE surf_landice_mod
	541
	542
	543

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

Original Format