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sbcice_lim.F90 in branches/2015/dev_r5218_CNRS17_coupling/NEMOGCM/NEMO/OPA_SRC/SBC – NEMO

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source: branches/2015/dev_r5218_CNRS17_coupling/NEMOGCM/NEMO/OPA_SRC/SBC/sbcice_lim.F90 @ 5220

Last change on this file since 5220 was 5220, checked in by smasson, 9 years ago
dev_r5218_CNRS17_coupling: first update
Property svn:keywords set to `Id`
File size: 31.6 KB

Rev	Line
[888]	1	MODULE sbcice_lim
	2	!!======================================================================
	3	!! * MODULE sbcice_lim *
[921]	4	!! Surface module : update the ocean surface boundary condition over ice
	5	!! & covered area using LIM sea-ice model
[2715]	6	!! Sea-Ice model : LIM-3 Sea ice model time-stepping
[2528]	7	!!=====================================================================
	8	!! History : 2.0 ! 2006-12 (M. Vancoppenolle) Original code
	9	!! 3.0 ! 2008-02 (C. Talandier) Surface module from icestp.F90
	10	!! - ! 2008-04 (G. Madec) sltyle and lim_ctl routine
	11	!! 3.3 ! 2010-11 (G. Madec) ice-ocean stress always computed at each ocean time-step
[3625]	12	!! 3.4 ! 2011-01 (A Porter) dynamical allocation
[4161]	13	!! - ! 2012-10 (C. Rousset) add lim_diahsb
[4990]	14	!! 3.6 ! 2014-07 (M. Vancoppenolle, G. Madec, O. Marti) revise coupled interface
[888]	15	!!----------------------------------------------------------------------
	16	#if defined key_lim3
	17	!!----------------------------------------------------------------------
	18	!! 'key_lim3' : LIM 3.0 sea-ice model
	19	!!----------------------------------------------------------------------
[921]	20	!! sbc_ice_lim : sea-ice model time-stepping and update ocean sbc over ice-covered area
[888]	21	!!----------------------------------------------------------------------
	22	USE oce ! ocean dynamics and tracers
	23	USE dom_oce ! ocean space and time domain
[2528]	24	USE ice ! LIM-3: ice variables
[5123]	25	USE thd_ice ! LIM-3: thermodynamical variables
[2528]	26	USE dom_ice ! LIM-3: ice domain
[888]	27
	28	USE sbc_oce ! Surface boundary condition: ocean fields
	29	USE sbc_ice ! Surface boundary condition: ice fields
	30	USE sbcblk_core ! Surface boundary condition: CORE bulk
	31	USE sbcblk_clio ! Surface boundary condition: CLIO bulk
[4161]	32	USE sbccpl ! Surface boundary condition: coupled interface
[2528]	33	USE albedo ! ocean & ice albedo
[888]	34
	35	USE phycst ! Define parameters for the routines
	36	USE eosbn2 ! equation of state
	37	USE limdyn ! Ice dynamics
	38	USE limtrp ! Ice transport
	39	USE limthd ! Ice thermodynamics
	40	USE limitd_me ! Mechanics on ice thickness distribution
	41	USE limsbc ! sea surface boundary condition
[4161]	42	USE limdiahsb ! Ice budget diagnostics
[888]	43	USE limwri ! Ice outputs
	44	USE limrst ! Ice restarts
[5123]	45	USE limupdate1 ! update of global variables
	46	USE limupdate2 ! update of global variables
[888]	47	USE limvar ! Ice variables switch
	48
[5123]	49	USE limmsh ! LIM mesh
	50	USE limistate ! LIM initial state
	51	USE limthd_sal ! LIM ice thermodynamics: salinity
	52
[2528]	53	USE c1d ! 1D vertical configuration
	54	USE lbclnk ! lateral boundary condition - MPP link
[2715]	55	USE lib_mpp ! MPP library
[3294]	56	USE wrk_nemo ! work arrays
[4161]	57	USE timing ! Timing
[888]	58	USE iom ! I/O manager library
	59	USE in_out_manager ! I/O manager
	60	USE prtctl ! Print control
[4333]	61	USE lib_fortran !
[5123]	62	USE limctl
[888]	63
[4161]	64	#if defined key_bdy
	65	USE bdyice_lim ! unstructured open boundary data (bdy_ice_lim routine)
	66	#endif
	67
[888]	68	IMPLICIT NONE
	69	PRIVATE
	70
	71	PUBLIC sbc_ice_lim ! routine called by sbcmod.F90
[5123]	72	PUBLIC sbc_lim_init ! routine called by sbcmod.F90
[888]	73
	74	!! * Substitutions
	75	# include "domzgr_substitute.h90"
	76	# include "vectopt_loop_substitute.h90"
	77	!!----------------------------------------------------------------------
[2715]	78	!! NEMO/OPA 4.0 , UCL NEMO Consortium (2011)
[1146]	79	!! $Id$
[2528]	80	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[888]	81	!!----------------------------------------------------------------------
	82	CONTAINS
	83
[4161]	84	!!======================================================================
	85
[2528]	86	SUBROUTINE sbc_ice_lim( kt, kblk )
[888]	87	!!---------------------------------------------------------------------
	88	!! * ROUTINE sbc_ice_lim *
	89	!!
	90	!! ** Purpose : update the ocean surface boundary condition via the
	91	!! Louvain la Neuve Sea Ice Model time stepping
	92	!!
	93	!! ** Method : ice model time stepping
	94	!! - call the ice dynamics routine
	95	!! - call the ice advection/diffusion routine
	96	!! - call the ice thermodynamics routine
	97	!! - call the routine that computes mass and
	98	!! heat fluxes at the ice/ocean interface
	99	!! - save the outputs
	100	!! - save the outputs for restart when necessary
	101	!!
	102	!! ** Action : - time evolution of the LIM sea-ice model
	103	!! - update all sbc variables below sea-ice:
[3625]	104	!! utau, vtau, taum, wndm, qns , qsr, emp , sfx
[888]	105	!!---------------------------------------------------------------------
	106	INTEGER, INTENT(in) :: kt ! ocean time step
[4990]	107	INTEGER, INTENT(in) :: kblk ! type of bulk (=3 CLIO, =4 CORE, =5 COUPLED)
[888]	108	!!
[5123]	109	INTEGER :: jl ! dummy loop index
[4990]	110	REAL(wp), POINTER, DIMENSION(:,:,:) :: zalb_os, zalb_cs ! ice albedo under overcast/clear sky
	111	REAL(wp), POINTER, DIMENSION(:,:,:) :: zalb_ice ! mean ice albedo (for coupled)
[5220]	112	REAL(wp), POINTER, DIMENSION(:,: ) :: zutau_ice, zvtau_ice
[888]	113	!!----------------------------------------------------------------------
	114
[4161]	115	IF( nn_timing == 1 ) CALL timing_start('sbc_ice_lim')
	116
[5123]	117	IF( MOD( kt-1, nn_fsbc ) == 0 ) THEN ! Ice time-step only
	118	!-----------------------!
	119	! --- Bulk Formulae --- !
	120	!-----------------------!
	121	u_oce(:,:) = ssu_m(:,:) * umask(:,:,1) ! mean surface ocean current at ice velocity point
	122	v_oce(:,:) = ssv_m(:,:) * vmask(:,:,1) ! (C-grid dynamics : U- & V-points as the ocean)
	123
	124	! masked sea surface freezing temperature [Kelvin] (set to rt0 over land)
	125	t_bo(:,:) = ( eos_fzp( sss_m ) + rt0 ) * tmask(:,:,1) + rt0 * ( 1._wp - tmask(:,:,1) )
	126	!
	127	! Ice albedo
[5220]	128	CALL wrk_alloc( jpi,jpj , zutau_ice, zvtau_ice)
[5123]	129	CALL wrk_alloc( jpi,jpj,jpl, zalb_os, zalb_cs, zalb_ice )
[4990]	130	CALL albedo_ice( t_su, ht_i, ht_s, zalb_cs, zalb_os ) ! cloud-sky and overcast-sky ice albedos
[4689]	131
[5123]	132	! CORE and COUPLED bulk formulations
[4990]	133	SELECT CASE( kblk )
[5123]	134	CASE( jp_core , jp_cpl )
[888]	135
[4990]	136	! albedo depends on cloud fraction because of non-linear spectral effects
	137	zalb_ice(:,:,:) = ( 1. - cldf_ice ) * zalb_cs(:,:,:) + cldf_ice * zalb_os(:,:,:)
	138	! In CLIO the cloud fraction is read in the climatology and the all-sky albedo
	139	! (zalb_ice) is computed within the bulk routine
	140
	141	END SELECT
	142
[5123]	143	! Mask sea ice surface temperature (set to rt0 over land)
[1109]	144	DO jl = 1, jpl
[5123]	145	t_su(:,:,jl) = t_su(:,:,jl) * tmask(:,:,1) + rt0 * ( 1._wp - tmask(:,:,1) )
[1109]	146	END DO
[4990]	147
	148	! Bulk formulae - provides the following fields:
[1469]	149	! utau_ice, vtau_ice : surface ice stress (U- & V-points) [N/m2]
	150	! qsr_ice , qns_ice : solar & non solar heat flux over ice (T-point) [W/m2]
	151	! qla_ice : latent heat flux over ice (T-point) [W/m2]
	152	! dqns_ice, dqla_ice : non solar & latent heat sensistivity (T-point) [W/m2]
	153	! tprecip , sprecip : total & solid precipitation (T-point) [Kg/m2/s]
	154	! fr1_i0 , fr2_i0 : 1sr & 2nd fraction of qsr penetration in ice [%]
[888]	155	!
	156	SELECT CASE( kblk )
[4990]	157	CASE( jp_clio ) ! CLIO bulk formulation
	158	CALL blk_ice_clio( t_su , zalb_cs , zalb_os , zalb_ice , &
[2715]	159	& utau_ice , vtau_ice , qns_ice , qsr_ice , &
	160	& qla_ice , dqns_ice , dqla_ice , &
	161	& tprecip , sprecip , &
	162	& fr1_i0 , fr2_i0 , cp_ice_msh, jpl )
[921]	163	!
[4990]	164	IF( nn_limflx /= 2 ) CALL ice_lim_flx( t_su, zalb_ice, qns_ice, qsr_ice , &
	165	& dqns_ice, qla_ice, dqla_ice, nn_limflx )
	166
	167	CASE( jp_core ) ! CORE bulk formulation
[4689]	168	CALL blk_ice_core( t_su , u_ice , v_ice , zalb_ice , &
[2715]	169	& utau_ice , vtau_ice , qns_ice , qsr_ice , &
	170	& qla_ice , dqns_ice , dqla_ice , &
	171	& tprecip , sprecip , &
[2528]	172	& fr1_i0 , fr2_i0 , cp_ice_msh, jpl )
[4990]	173	!
	174	IF( nn_limflx /= 2 ) CALL ice_lim_flx( t_su, zalb_ice, qns_ice, qsr_ice , &
	175	& dqns_ice, qla_ice, dqla_ice, nn_limflx )
[4161]	176	!
[4990]	177	CASE ( jp_cpl )
[4161]	178
	179	CALL sbc_cpl_ice_tau( utau_ice , vtau_ice )
	180
[888]	181	END SELECT
[4990]	182
[5220]	183	IF( ln_mixcpl) THEN
	184	CALL sbc_cpl_ice_tau( zutau_ice , zvtau_ice )
	185	utau_ice(:,:) = utau_ice(:,:) * xcplmask(:,:,0) + zutau_ice(:,:) * ( 1. - xcplmask(:,:,0) )
	186	vtau_ice(:,:) = vtau_ice(:,:) * xcplmask(:,:,0) + zvtau_ice(:,:) * ( 1. - xcplmask(:,:,0) )
	187	ENDIF
	188
	189	! !----------------------!
	190	! ! LIM-3 time-stepping !
	191	! !----------------------!
	192	!
[921]	193	numit = numit + nn_fsbc ! Ice model time step
[5123]	194	!
[5167]	195	CALL sbc_lim_bef ! Store previous ice values
[4689]	196
[5123]	197	CALL sbc_lim_diag0 ! set diag of mass, heat and salt fluxes to 0
	198
	199	CALL lim_rst_opn( kt ) ! Open Ice restart file
[921]	200	!
[4333]	201	! ----------------------------------------------
	202	! ice dynamics and transport (except in 1D case)
	203	! ----------------------------------------------
	204	IF( .NOT. lk_c1d ) THEN
[5123]	205
	206	CALL lim_dyn( kt ) ! Ice dynamics ( rheology/dynamics )
	207
	208	CALL lim_trp( kt ) ! Ice transport ( Advection/diffusion )
	209
	210	IF( nn_monocat /= 2 ) CALL lim_itd_me ! Mechanical redistribution ! (ridging/rafting)
	211
[4333]	212	#if defined key_bdy
[5123]	213	CALL bdy_ice_lim( kt ) ! bdy ice thermo
[5128]	214	IF( ln_icectl ) CALL lim_prt( kt, iiceprt, jiceprt, 1, ' - ice thermo bdy - ' )
[4333]	215	#endif
[5123]	216	CALL lim_update1( kt )
	217
[900]	218	ENDIF
[5123]	219
[5167]	220	CALL sbc_lim_bef ! Store previous ice values
[4333]	221
	222	! ----------------------------------------------
[5123]	223	! ice thermodynamics
[4333]	224	! ----------------------------------------------
[5123]	225	CALL lim_var_agg(1)
	226
	227	! previous lead fraction and ice volume for flux calculations
	228	pfrld(:,:) = 1._wp - at_i(:,:)
	229	phicif(:,:) = vt_i(:,:)
	230
	231	SELECT CASE( kblk )
	232	CASE ( jp_cpl )
	233	CALL sbc_cpl_ice_flx( p_frld=pfrld, palbi=zalb_ice, psst=sst_m, pist=t_su )
	234	IF( nn_limflx == 2 ) CALL ice_lim_flx( t_su, zalb_ice, qns_ice, qsr_ice , &
	235	& dqns_ice, qla_ice, dqla_ice, nn_limflx )
	236	! Latent heat flux is forced to 0 in coupled: it is included in qns (non-solar heat flux)
	237	qla_ice (:,:,:) = 0._wp
	238	dqla_ice (:,:,:) = 0._wp
	239	END SELECT
[921]	240	!
[5123]	241	CALL lim_thd( kt ) ! Ice thermodynamics
	242
	243	CALL lim_update2( kt ) ! Corrections
[888]	244	!
[5123]	245	CALL lim_sbc_flx( kt ) ! Update surface ocean mass, heat and salt fluxes
[921]	246	!
[5123]	247	IF(ln_limdiaout) CALL lim_diahsb ! Diagnostics and outputs
	248
	249	CALL lim_wri( 1 ) ! Ice outputs
	250
[4205]	251	IF( kt == nit000 .AND. ln_rstart ) &
[5123]	252	& CALL iom_close( numrir ) ! close input ice restart file
[4205]	253	!
[5123]	254	IF( lrst_ice ) CALL lim_rst_write( kt ) ! Ice restart file
[921]	255	!
[5167]	256	IF( ln_icectl ) CALL lim_ctl( kt ) ! alerts in case of model crash
[921]	257	!
[5220]	258	CALL wrk_dealloc( jpi,jpj , zutau_ice, zvtau_ice)
[4990]	259	CALL wrk_dealloc( jpi,jpj,jpl, zalb_os, zalb_cs, zalb_ice )
	260	!
[5123]	261	ENDIF ! End sea-ice time step only
[888]	262
[5123]	263	!--------------------------------!
	264	! --- at all ocean time step --- !
	265	!--------------------------------!
	266	! Update surface ocean stresses (only in ice-dynamic case)
	267	! otherwise the atm.-ocean stresses are used everywhere
[2528]	268	IF( ln_limdyn ) CALL lim_sbc_tau( kt, ub(:,:,1), vb(:,:,1) ) ! using before instantaneous surf. currents
	269	!!gm remark, the ocean-ice stress is not saved in ice diag call above ..... find a solution!!!
[2715]	270	!
[4161]	271	IF( nn_timing == 1 ) CALL timing_stop('sbc_ice_lim')
	272	!
[921]	273	END SUBROUTINE sbc_ice_lim
[4990]	274
[5123]	275
	276	SUBROUTINE sbc_lim_init
	277	!!----------------------------------------------------------------------
	278	!! * ROUTINE sbc_lim_init *
	279	!!
	280	!! ** purpose : Allocate all the dynamic arrays of the LIM-3 modules
	281	!!----------------------------------------------------------------------
	282	INTEGER :: ierr
	283	!!----------------------------------------------------------------------
	284	IF(lwp) WRITE(numout,*)
	285	IF(lwp) WRITE(numout,*) 'sbc_ice_lim : update ocean surface boudary condition'
	286	IF(lwp) WRITE(numout,*) '~~~~~~~~~~~ via Louvain la Neuve Ice Model (LIM-3) time stepping'
	287	!
	288	! Open the reference and configuration namelist files and namelist output file
	289	CALL ctl_opn( numnam_ice_ref, 'namelist_ice_ref', 'OLD', 'FORMATTED', 'SEQUENTIAL', -1, numout, lwp )
	290	CALL ctl_opn( numnam_ice_cfg, 'namelist_ice_cfg', 'OLD', 'FORMATTED', 'SEQUENTIAL', -1, numout, lwp )
	291	IF(lwm) CALL ctl_opn( numoni, 'output.namelist.ice', 'UNKNOWN', 'FORMATTED', 'SEQUENTIAL', -1, numout, lwp, 1 )
	292
	293	CALL ice_run ! set some ice run parameters
	294	!
	295	! ! Allocate the ice arrays
	296	ierr = ice_alloc () ! ice variables
	297	ierr = ierr + dom_ice_alloc () ! domain
	298	ierr = ierr + sbc_ice_alloc () ! surface forcing
	299	ierr = ierr + thd_ice_alloc () ! thermodynamics
	300	ierr = ierr + lim_itd_me_alloc () ! ice thickness distribution - mechanics
	301	!
	302	IF( lk_mpp ) CALL mpp_sum( ierr )
	303	IF( ierr /= 0 ) CALL ctl_stop('STOP', 'sbc_lim_init : unable to allocate ice arrays')
	304	!
	305	! ! adequation jpk versus ice/snow layers/categories
	306	IF( jpl > jpk .OR. (nlay_i+1) > jpk .OR. nlay_s > jpk ) &
	307	& CALL ctl_stop( 'STOP', &
	308	& 'sbc_lim_init: the 3rd dimension of workspace arrays is too small.', &
	309	& 'use more ocean levels or less ice/snow layers/categories.' )
	310	!
	311	CALL lim_itd_init ! ice thickness distribution initialization
	312	!
	313	CALL lim_thd_init ! set ice thermodynics parameters
	314	!
	315	CALL lim_thd_sal_init ! set ice salinity parameters
	316	!
	317	CALL lim_msh ! ice mesh initialization
	318	!
	319	CALL lim_itd_me_init ! ice thickness distribution initialization for mecanical deformation
	320	! ! Initial sea-ice state
	321	IF( .NOT. ln_rstart ) THEN ! start from rest: sea-ice deduced from sst
	322	numit = 0
	323	numit = nit000 - 1
	324	CALL lim_istate
	325	ELSE ! start from a restart file
	326	CALL lim_rst_read
	327	numit = nit000 - 1
	328	ENDIF
	329	CALL lim_var_agg(1)
	330	CALL lim_var_glo2eqv
	331	!
	332	CALL lim_sbc_init ! ice surface boundary condition
	333	!
	334	fr_i(:,:) = at_i(:,:) ! initialisation of sea-ice fraction
	335	tn_ice(:,:,:) = t_su(:,:,:) ! initialisation of surface temp for coupled simu
	336	!
	337	nstart = numit + nn_fsbc
	338	nitrun = nitend - nit000 + 1
	339	nlast = numit + nitrun
	340	!
	341	IF( nstock == 0 ) nstock = nlast + 1
	342	!
	343	END SUBROUTINE sbc_lim_init
	344
	345
	346	SUBROUTINE ice_run
	347	!!-------------------------------------------------------------------
	348	!! * ROUTINE ice_run *
	349	!!
	350	!! ** Purpose : Definition some run parameter for ice model
	351	!!
	352	!! ** Method : Read the namicerun namelist and check the parameter
	353	!! values called at the first timestep (nit000)
	354	!!
	355	!! ** input : Namelist namicerun
	356	!!-------------------------------------------------------------------
	357	INTEGER :: ios ! Local integer output status for namelist read
	358	NAMELIST/namicerun/ jpl, nlay_i, nlay_s, cn_icerst_in, cn_icerst_out, &
[5128]	359	& ln_limdyn, rn_amax, ln_limdiahsb, ln_limdiaout, ln_icectl, iiceprt, jiceprt
[5123]	360	!!-------------------------------------------------------------------
	361	!
	362	REWIND( numnam_ice_ref ) ! Namelist namicerun in reference namelist : Parameters for ice
	363	READ ( numnam_ice_ref, namicerun, IOSTAT = ios, ERR = 901)
	364	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namicerun in reference namelist', lwp )
	365
	366	REWIND( numnam_ice_cfg ) ! Namelist namicerun in configuration namelist : Parameters for ice
	367	READ ( numnam_ice_cfg, namicerun, IOSTAT = ios, ERR = 902 )
	368	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namicerun in configuration namelist', lwp )
	369	IF(lwm) WRITE ( numoni, namicerun )
	370	!
	371	!
	372	IF(lwp) THEN ! control print
	373	WRITE(numout,*)
	374	WRITE(numout,*) 'ice_run : ice share parameters for dynamics/advection/thermo of sea-ice'
	375	WRITE(numout,*) ' ~~~~~~'
	376	WRITE(numout,*) ' number of ice categories = ', jpl
	377	WRITE(numout,*) ' number of ice layers = ', nlay_i
	378	WRITE(numout,*) ' number of snow layers = ', nlay_s
	379	WRITE(numout,*) ' switch for ice dynamics (1) or not (0) ln_limdyn = ', ln_limdyn
	380	WRITE(numout,*) ' maximum ice concentration = ', rn_amax
	381	WRITE(numout,*) ' Diagnose heat/salt budget or not ln_limdiahsb = ', ln_limdiahsb
	382	WRITE(numout,*) ' Output heat/salt budget or not ln_limdiaout = ', ln_limdiaout
[5128]	383	WRITE(numout,*) ' control prints in ocean.out for (i,j)=(iiceprt,jiceprt) = ', ln_icectl
	384	WRITE(numout,*) ' i-index for control prints (ln_icectl=true) = ', iiceprt
	385	WRITE(numout,*) ' j-index for control prints (ln_icectl=true) = ', jiceprt
[5123]	386	ENDIF
	387	!
	388	! sea-ice timestep and inverse
	389	rdt_ice = nn_fsbc * rdttra(1)
	390	r1_rdtice = 1._wp / rdt_ice
	391
	392	! inverse of nlay_i and nlay_s
	393	r1_nlay_i = 1._wp / REAL( nlay_i, wp )
	394	r1_nlay_s = 1._wp / REAL( nlay_s, wp )
	395	!
[5167]	396	#if defined key_bdy
	397	IF( lwp .AND. ln_limdiahsb ) CALL ctl_warn('online conservation check activated but it does not work with BDY')
	398	#endif
	399	!
[5123]	400	END SUBROUTINE ice_run
	401
	402
	403	SUBROUTINE lim_itd_init
	404	!!------------------------------------------------------------------
	405	!! * ROUTINE lim_itd_init *
	406	!!
	407	!! ** Purpose : Initializes the ice thickness distribution
	408	!! ** Method : ...
	409	!! ** input : Namelist namiceitd
	410	!!-------------------------------------------------------------------
	411	INTEGER :: ios ! Local integer output status for namelist read
	412	NAMELIST/namiceitd/ nn_catbnd, rn_himean
	413	!
	414	INTEGER :: jl ! dummy loop index
	415	REAL(wp) :: zc1, zc2, zc3, zx1 ! local scalars
	416	REAL(wp) :: zhmax, znum, zden, zalpha !
	417	!!------------------------------------------------------------------
	418	!
	419	REWIND( numnam_ice_ref ) ! Namelist namiceitd in reference namelist : Parameters for ice
	420	READ ( numnam_ice_ref, namiceitd, IOSTAT = ios, ERR = 903)
	421	903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceitd in reference namelist', lwp )
	422
	423	REWIND( numnam_ice_cfg ) ! Namelist namiceitd in configuration namelist : Parameters for ice
	424	READ ( numnam_ice_cfg, namiceitd, IOSTAT = ios, ERR = 904 )
	425	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceitd in configuration namelist', lwp )
	426	IF(lwm) WRITE ( numoni, namiceitd )
	427	!
	428	!
	429	IF(lwp) THEN ! control print
	430	WRITE(numout,*)
	431	WRITE(numout,*) 'ice_itd : ice cat distribution'
	432	WRITE(numout,*) ' ~~~~~~'
	433	WRITE(numout,*) ' shape of ice categories distribution nn_catbnd = ', nn_catbnd
	434	WRITE(numout,*) ' mean ice thickness in the domain (only active if nn_catbnd=2) rn_himean = ', rn_himean
	435	ENDIF
	436
	437	!----------------------------------
	438	!- Thickness categories boundaries
	439	!----------------------------------
	440	IF(lwp) WRITE(numout,*)
	441	IF(lwp) WRITE(numout,*) 'lim_itd_init : Initialization of ice cat distribution '
	442	IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~'
	443
	444	hi_max(:) = 0._wp
	445
	446	SELECT CASE ( nn_catbnd )
	447	!----------------------
	448	CASE (1) ! tanh function (CICE)
	449	!----------------------
	450	zc1 = 3._wp / REAL( jpl, wp )
	451	zc2 = 10._wp * zc1
	452	zc3 = 3._wp
	453
	454	DO jl = 1, jpl
	455	zx1 = REAL( jl-1, wp ) / REAL( jpl, wp )
	456	hi_max(jl) = hi_max(jl-1) + zc1 + zc2 * (1._wp + TANH( zc3 * (zx1 - 1._wp ) ) )
	457	END DO
	458
	459	!----------------------
	460	CASE (2) ! h^(-alpha) function
	461	!----------------------
	462	zalpha = 0.05 ! exponent of the transform function
	463
	464	zhmax = 3.*rn_himean
	465
	466	DO jl = 1, jpl
	467	znum = jpl * ( zhmax+1 )**zalpha
	468	zden = ( jpl - jl ) * ( zhmax+1 )**zalpha + jl
	469	hi_max(jl) = ( znum / zden )**(1./zalpha) - 1
	470	END DO
	471
	472	END SELECT
	473
	474	DO jl = 1, jpl
	475	hi_mean(jl) = ( hi_max(jl) + hi_max(jl-1) ) * 0.5_wp
	476	END DO
	477
	478	! Set hi_max(jpl) to a big value to ensure that all ice is thinner than hi_max(jpl)
	479	hi_max(jpl) = 99._wp
	480
	481	IF(lwp) WRITE(numout,*) ' Thickness category boundaries '
	482	IF(lwp) WRITE(numout,*) ' hi_max ', hi_max(0:jpl)
	483	!
	484	END SUBROUTINE lim_itd_init
	485
[4990]	486
[5123]	487	SUBROUTINE ice_lim_flx( ptn_ice, palb_ice, pqns_ice, pqsr_ice, &
[4990]	488	& pdqn_ice, pqla_ice, pdql_ice, k_limflx )
	489	!!---------------------------------------------------------------------
[5123]	490	!! * ROUTINE ice_lim_flx *
[4990]	491	!!
	492	!! ** Purpose : update the ice surface boundary condition by averaging and / or
	493	!! redistributing fluxes on ice categories
	494	!!
	495	!! ** Method : average then redistribute
	496	!!
	497	!! ** Action :
	498	!!---------------------------------------------------------------------
	499	INTEGER , INTENT(in ) :: k_limflx ! =-1 do nothing; =0 average ;
	500	! =1 average and redistribute ; =2 redistribute
	501	REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: ptn_ice ! ice surface temperature
	502	REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: palb_ice ! ice albedo
	503	REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: pqns_ice ! non solar flux
	504	REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: pqsr_ice ! net solar flux
	505	REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: pdqn_ice ! non solar flux sensitivity
	506	REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: pqla_ice ! latent heat flux
	507	REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: pdql_ice ! latent heat flux sensitivity
	508	!
	509	INTEGER :: jl ! dummy loop index
	510	!
	511	REAL(wp), POINTER, DIMENSION(:,:) :: zalb_m ! Mean albedo over all categories
	512	REAL(wp), POINTER, DIMENSION(:,:) :: ztem_m ! Mean temperature over all categories
	513	!
	514	REAL(wp), POINTER, DIMENSION(:,:) :: z_qsr_m ! Mean solar heat flux over all categories
	515	REAL(wp), POINTER, DIMENSION(:,:) :: z_qns_m ! Mean non solar heat flux over all categories
	516	REAL(wp), POINTER, DIMENSION(:,:) :: z_qla_m ! Mean latent heat flux over all categories
	517	REAL(wp), POINTER, DIMENSION(:,:) :: z_dqn_m ! Mean d(qns)/dT over all categories
	518	REAL(wp), POINTER, DIMENSION(:,:) :: z_dql_m ! Mean d(qla)/dT over all categories
	519	!!----------------------------------------------------------------------
[888]	520
[4990]	521	IF( nn_timing == 1 ) CALL timing_start('ice_lim_flx')
	522	!
	523	!
	524	SELECT CASE( k_limflx ) !== averaged on all ice categories ==!
	525	CASE( 0 , 1 )
	526	CALL wrk_alloc( jpi,jpj, z_qsr_m, z_qns_m, z_qla_m, z_dqn_m, z_dql_m)
	527	!
	528	z_qns_m(:,:) = fice_ice_ave ( pqns_ice (:,:,:) )
	529	z_qsr_m(:,:) = fice_ice_ave ( pqsr_ice (:,:,:) )
	530	z_dqn_m(:,:) = fice_ice_ave ( pdqn_ice (:,:,:) )
	531	z_qla_m(:,:) = fice_ice_ave ( pqla_ice (:,:,:) )
	532	z_dql_m(:,:) = fice_ice_ave ( pdql_ice (:,:,:) )
	533	DO jl = 1, jpl
	534	pdqn_ice(:,:,jl) = z_dqn_m(:,:)
	535	pdql_ice(:,:,jl) = z_dql_m(:,:)
	536	END DO
	537	!
	538	DO jl = 1, jpl
	539	pqns_ice(:,:,jl) = z_qns_m(:,:)
	540	pqsr_ice(:,:,jl) = z_qsr_m(:,:)
	541	pqla_ice(:,:,jl) = z_qla_m(:,:)
	542	END DO
	543	!
	544	CALL wrk_dealloc( jpi,jpj, z_qsr_m, z_qns_m, z_qla_m, z_dqn_m, z_dql_m)
	545	END SELECT
[888]	546
[4990]	547	SELECT CASE( k_limflx ) !== redistribution on all ice categories ==!
	548	CASE( 1 , 2 )
	549	CALL wrk_alloc( jpi,jpj, zalb_m, ztem_m )
	550	!
	551	zalb_m(:,:) = fice_ice_ave ( palb_ice (:,:,:) )
	552	ztem_m(:,:) = fice_ice_ave ( ptn_ice (:,:,:) )
	553	DO jl = 1, jpl
	554	pqns_ice(:,:,jl) = pqns_ice(:,:,jl) + pdqn_ice(:,:,jl) * (ptn_ice(:,:,jl) - ztem_m(:,:))
	555	pqla_ice(:,:,jl) = pqla_ice(:,:,jl) + pdql_ice(:,:,jl) * (ptn_ice(:,:,jl) - ztem_m(:,:))
	556	pqsr_ice(:,:,jl) = pqsr_ice(:,:,jl) * ( 1._wp - palb_ice(:,:,jl) ) / ( 1._wp - zalb_m(:,:) )
	557	END DO
	558	!
	559	CALL wrk_dealloc( jpi,jpj, zalb_m, ztem_m )
	560	END SELECT
	561	!
	562	IF( nn_timing == 1 ) CALL timing_stop('ice_lim_flx')
	563	!
	564	END SUBROUTINE ice_lim_flx
[888]	565
[5167]	566	SUBROUTINE sbc_lim_bef
[5123]	567	!!----------------------------------------------------------------------
[5167]	568	!! * ROUTINE sbc_lim_bef *
[5123]	569	!!
	570	!! ** purpose : store ice variables at "before" time step
	571	!!----------------------------------------------------------------------
	572	a_i_b (:,:,:) = a_i (:,:,:) ! ice area
	573	e_i_b (:,:,:,:) = e_i (:,:,:,:) ! ice thermal energy
	574	v_i_b (:,:,:) = v_i (:,:,:) ! ice volume
	575	v_s_b (:,:,:) = v_s (:,:,:) ! snow volume
	576	e_s_b (:,:,:,:) = e_s (:,:,:,:) ! snow thermal energy
	577	smv_i_b(:,:,:) = smv_i(:,:,:) ! salt content
	578	oa_i_b (:,:,:) = oa_i (:,:,:) ! areal age content
	579	u_ice_b(:,:) = u_ice(:,:)
	580	v_ice_b(:,:) = v_ice(:,:)
	581
[5167]	582	END SUBROUTINE sbc_lim_bef
[921]	583
[5123]	584	SUBROUTINE sbc_lim_diag0
	585	!!----------------------------------------------------------------------
	586	!! * ROUTINE sbc_lim_diag0 *
[888]	587	!!
[5123]	588	!! ** purpose : set ice-ocean and ice-atm. fluxes to zeros at the beggining
	589	!! of the time step
	590	!!----------------------------------------------------------------------
	591	sfx (:,:) = 0._wp ;
	592	sfx_bri(:,:) = 0._wp ;
	593	sfx_sni(:,:) = 0._wp ; sfx_opw(:,:) = 0._wp
	594	sfx_bog(:,:) = 0._wp ; sfx_dyn(:,:) = 0._wp
	595	sfx_bom(:,:) = 0._wp ; sfx_sum(:,:) = 0._wp
	596	sfx_res(:,:) = 0._wp
	597
	598	wfx_snw(:,:) = 0._wp ; wfx_ice(:,:) = 0._wp
	599	wfx_sni(:,:) = 0._wp ; wfx_opw(:,:) = 0._wp
	600	wfx_bog(:,:) = 0._wp ; wfx_dyn(:,:) = 0._wp
	601	wfx_bom(:,:) = 0._wp ; wfx_sum(:,:) = 0._wp
	602	wfx_res(:,:) = 0._wp ; wfx_sub(:,:) = 0._wp
	603	wfx_spr(:,:) = 0._wp ;
	604
	605	hfx_in (:,:) = 0._wp ; hfx_out(:,:) = 0._wp
	606	hfx_thd(:,:) = 0._wp ;
	607	hfx_snw(:,:) = 0._wp ; hfx_opw(:,:) = 0._wp
	608	hfx_bog(:,:) = 0._wp ; hfx_dyn(:,:) = 0._wp
	609	hfx_bom(:,:) = 0._wp ; hfx_sum(:,:) = 0._wp
	610	hfx_res(:,:) = 0._wp ; hfx_sub(:,:) = 0._wp
	611	hfx_spr(:,:) = 0._wp ; hfx_dif(:,:) = 0._wp
	612	hfx_err(:,:) = 0._wp ; hfx_err_rem(:,:) = 0._wp
[5167]	613	hfx_err_dif(:,:) = 0._wp ;
[888]	614
[5123]	615	afx_tot(:,:) = 0._wp ;
	616	afx_dyn(:,:) = 0._wp ; afx_thd(:,:) = 0._wp
[921]	617
[5167]	618	diag_heat(:,:) = 0._wp ; diag_smvi(:,:) = 0._wp ;
	619	diag_vice(:,:) = 0._wp ; diag_vsnw(:,:) = 0._wp ;
[5123]	620
	621	END SUBROUTINE sbc_lim_diag0
	622
[4990]	623	FUNCTION fice_cell_ave ( ptab )
	624	!!--------------------------------------------------------------------------
	625	!! * Compute average over categories, for grid cell (ice covered and free ocean)
	626	!!--------------------------------------------------------------------------
	627	REAL (wp), DIMENSION (jpi,jpj) :: fice_cell_ave
	628	REAL (wp), DIMENSION (jpi,jpj,jpl), INTENT (in) :: ptab
	629	INTEGER :: jl ! Dummy loop index
	630
	631	fice_cell_ave (:,:) = 0.0_wp
	632
	633	DO jl = 1, jpl
[5123]	634	fice_cell_ave (:,:) = fice_cell_ave (:,:) + a_i (:,:,jl) * ptab (:,:,jl)
[4990]	635	END DO
	636
	637	END FUNCTION fice_cell_ave
	638
	639
	640	FUNCTION fice_ice_ave ( ptab )
	641	!!--------------------------------------------------------------------------
	642	!! * Compute average over categories, for ice covered part of grid cell
	643	!!--------------------------------------------------------------------------
	644	REAL (kind=wp), DIMENSION (jpi,jpj) :: fice_ice_ave
	645	REAL (kind=wp), DIMENSION (jpi,jpj,jpl), INTENT(in) :: ptab
[888]	646
[4990]	647	fice_ice_ave (:,:) = 0.0_wp
[5167]	648	WHERE ( at_i (:,:) > 0.0_wp ) fice_ice_ave (:,:) = fice_cell_ave ( ptab (:,:,:)) / at_i (:,:)
[4990]	649
	650	END FUNCTION fice_ice_ave
	651
	652
[888]	653	#else
	654	!!----------------------------------------------------------------------
	655	!! Default option Dummy module NO LIM 3.0 sea-ice model
	656	!!----------------------------------------------------------------------
	657	CONTAINS
[2528]	658	SUBROUTINE sbc_ice_lim ( kt, kblk ) ! Dummy routine
	659	WRITE(,) 'sbc_ice_lim: You should not have seen this print! error?', kt, kblk
[888]	660	END SUBROUTINE sbc_ice_lim
[5123]	661	SUBROUTINE sbc_lim_init ! Dummy routine
	662	END SUBROUTINE sbc_lim_init
[888]	663	#endif
	664
	665	!!======================================================================
	666	END MODULE sbcice_lim

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