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limthd_lac.F90 in branches/2014/dev_r4650_UKMO13_CICE_changes_take2/NEMOGCM/NEMO/LIM_SRC_3 – NEMO

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source: branches/2014/dev_r4650_UKMO13_CICE_changes_take2/NEMOGCM/NEMO/LIM_SRC_3/limthd_lac.F90 @ 4921

Last change on this file since 4921 was 4921, checked in by timgraham, 9 years ago
merged with revision 4879 of trunk
Property svn:keywords set to `Id`
File size: 26.2 KB

Rev	Line
[825]	1	MODULE limthd_lac
	2	!!======================================================================
	3	!! * MODULE limthd_lac *
	4	!! lateral thermodynamic growth of the ice
	5	!!======================================================================
[2715]	6	!! History : LIM ! 2005-12 (M. Vancoppenolle) Original code
	7	!! - ! 2006-01 (M. Vancoppenolle) add ITD
	8	!! 3.0 ! 2007-07 (M. Vancoppenolle) Mass and energy conservation tested
	9	!! 4.0 ! 2011-02 (G. Madec) dynamical allocation
	10	!!----------------------------------------------------------------------
[888]	11	#if defined key_lim3
[825]	12	!!----------------------------------------------------------------------
[2528]	13	!! 'key_lim3' LIM3 sea-ice model
	14	!!----------------------------------------------------------------------
[3625]	15	!! lim_lat_acr : lateral accretion of ice
[2528]	16	!!----------------------------------------------------------------------
[3625]	17	USE par_oce ! ocean parameters
	18	USE dom_oce ! domain variables
	19	USE phycst ! physical constants
	20	USE sbc_oce ! Surface boundary condition: ocean fields
	21	USE sbc_ice ! Surface boundary condition: ice fields
	22	USE thd_ice ! LIM thermodynamics
	23	USE dom_ice ! LIM domain
	24	USE par_ice ! LIM parameters
	25	USE ice ! LIM variables
	26	USE limtab ! LIM 2D <==> 1D
	27	USE limcons ! LIM conservation
	28	USE in_out_manager ! I/O manager
	29	USE lib_mpp ! MPP library
	30	USE wrk_nemo ! work arrays
[4921]	31	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
[3625]	32	USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined)
[4921]	33	USE limthd_ent
[921]	34
[825]	35	IMPLICIT NONE
	36	PRIVATE
	37
	38	PUBLIC lim_thd_lac ! called by lim_thd
	39
[4333]	40	REAL(wp) :: epsi10 = 1.e-10_wp !
[4921]	41	REAL(wp) :: epsi20 = 1.e-20_wp !
[825]	42
	43	!!----------------------------------------------------------------------
[4161]	44	!! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011)
[1156]	45	!! $Id$
[2715]	46	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[825]	47	!!----------------------------------------------------------------------
	48	CONTAINS
[921]	49
[825]	50	SUBROUTINE lim_thd_lac
	51	!!-------------------------------------------------------------------
	52	!! * ROUTINE lim_thd_lac *
	53	!!
	54	!! ** Purpose : Computation of the evolution of the ice thickness and
	55	!! concentration as a function of the heat balance in the leads.
	56	!! It is only used for lateral accretion
	57	!!
	58	!! ** Method : Ice is formed in the open water when ocean lose heat
	59	!! (heat budget of open water Bl is negative) .
	60	!! Computation of the increase of 1-A (ice concentration) fol-
	61	!! lowing the law :
	62	!! (dA/dt)acc = F[ (1-A)/(1-a) ] * [ Bl / (Li*h0) ]
	63	!! where - h0 is the thickness of ice created in the lead
	64	!! - a is a minimum fraction for leads
	65	!! - F is a monotonic non-increasing function defined as:
	66	!! F(X)=( 1 - Xexld )(1.0/exld)
	67	!! - exld is the exponent closure rate (=2 default val.)
	68	!!
	69	!! ** Action : - Adjustment of snow and ice thicknesses and heat
	70	!! content in brine pockets
	71	!! - Updating ice internal temperature
	72	!! - Computation of variation of ice volume and mass
	73	!! - Computation of frldb after lateral accretion and
[4921]	74	!! update ht_s_1d, ht_i_1d and tbif_1d(:,:)
[825]	75	!!------------------------------------------------------------------------
[4921]	76	INTEGER :: ji,jj,jk,jl ! dummy loop indices
	77	INTEGER :: nbpac ! local integers
	78	INTEGER :: ii, ij, iter ! - -
	79	REAL(wp) :: ztmelts, zdv, zfrazb, zweight, zindb, zinda, zde ! local scalars
[2715]	80	REAL(wp) :: zgamafr, zvfrx, zvgx, ztaux, ztwogp, zf , zhicol_new ! - -
	81	REAL(wp) :: ztenagm, zvfry, zvgy, ztauy, zvrel2, zfp, zsqcd , zhicrit ! - -
	82	LOGICAL :: iterate_frazil ! iterate frazil ice collection thickness
	83	CHARACTER (len = 15) :: fieldid
[4921]	84
	85	REAL(wp) :: zQm ! enthalpy exchanged with the ocean (J/m2, >0 towards ocean)
	86	REAL(wp) :: zEi ! sea ice specific enthalpy (J/kg)
	87	REAL(wp) :: zEw ! seawater specific enthalpy (J/kg)
	88	REAL(wp) :: zfmdt ! mass flux x time step (kg/m2, >0 towards ocean)
	89
	90	REAL(wp) :: zv_newfra
	91
	92	INTEGER , POINTER, DIMENSION(:) :: jcat ! indexes of categories where new ice grows
[3294]	93	REAL(wp), POINTER, DIMENSION(:) :: zswinew ! switch for new ice or not
[825]	94
[3294]	95	REAL(wp), POINTER, DIMENSION(:) :: zv_newice ! volume of accreted ice
	96	REAL(wp), POINTER, DIMENSION(:) :: za_newice ! fractional area of accreted ice
	97	REAL(wp), POINTER, DIMENSION(:) :: zh_newice ! thickness of accreted ice
	98	REAL(wp), POINTER, DIMENSION(:) :: ze_newice ! heat content of accreted ice
	99	REAL(wp), POINTER, DIMENSION(:) :: zs_newice ! salinity of accreted ice
	100	REAL(wp), POINTER, DIMENSION(:) :: zo_newice ! age of accreted ice
	101	REAL(wp), POINTER, DIMENSION(:) :: zdv_res ! residual volume in case of excessive heat budget
	102	REAL(wp), POINTER, DIMENSION(:) :: zda_res ! residual area in case of excessive heat budget
[4921]	103	REAL(wp), POINTER, DIMENSION(:) :: zat_i_1d ! total ice fraction
	104	REAL(wp), POINTER, DIMENSION(:) :: zv_frazb ! accretion of frazil ice at the ice bottom
	105	REAL(wp), POINTER, DIMENSION(:) :: zvrel_1d ! relative ice / frazil velocity (1D vector)
[825]	106
[4921]	107	REAL(wp), POINTER, DIMENSION(:,:) :: zv_b ! old volume of ice in category jl
	108	REAL(wp), POINTER, DIMENSION(:,:) :: za_b ! old area of ice in category jl
	109	REAL(wp), POINTER, DIMENSION(:,:) :: za_i_1d ! 1-D version of a_i
	110	REAL(wp), POINTER, DIMENSION(:,:) :: zv_i_1d ! 1-D version of v_i
	111	REAL(wp), POINTER, DIMENSION(:,:) :: zoa_i_1d ! 1-D version of oa_i
	112	REAL(wp), POINTER, DIMENSION(:,:) :: zsmv_i_1d ! 1-D version of smv_i
[825]	113
[4921]	114	REAL(wp), POINTER, DIMENSION(:,:,:) :: ze_i_1d !: 1-D version of e_i
[825]	115
[3294]	116	REAL(wp), POINTER, DIMENSION(:,:) :: zvrel ! relative ice / frazil velocity
	117	!!-----------------------------------------------------------------------!
[825]	118
[4921]	119	CALL wrk_alloc( jpij, jcat ) ! integer
[3294]	120	CALL wrk_alloc( jpij, zswinew, zv_newice, za_newice, zh_newice, ze_newice, zs_newice, zo_newice )
[4921]	121	CALL wrk_alloc( jpij, zdv_res, zda_res, zat_i_1d, zv_frazb, zvrel_1d )
	122	CALL wrk_alloc( jpij,jpl, zv_b, za_b, za_i_1d, zv_i_1d, zoa_i_1d, zsmv_i_1d )
	123	CALL wrk_alloc( jpij,nlay_i+1,jpl, ze_i_1d )
	124	CALL wrk_alloc( jpi,jpj, zvrel )
[3294]	125
[921]	126	!------------------------------------------------------------------------------\|
	127	! 2) Convert units for ice internal energy
	128	!------------------------------------------------------------------------------\|
[825]	129	DO jl = 1, jpl
[921]	130	DO jk = 1, nlay_i
	131	DO jj = 1, jpj
	132	DO ji = 1, jpi
	133	!Energy of melting q(S,T) [J.m-3]
[4333]	134	zindb = 1._wp - MAX( 0._wp , SIGN( 1._wp , -v_i(ji,jj,jl) + epsi10 ) ) !0 if no ice and 1 if yes
[4921]	135	e_i(ji,jj,jk,jl) = zindb * e_i(ji,jj,jk,jl) / ( area(ji,jj) * MAX( v_i(ji,jj,jl) , epsi10 ) ) * REAL( nlay_i, wp )
	136	e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * unit_fac
[921]	137	END DO
[825]	138	END DO
[921]	139	END DO
[825]	140	END DO
	141
[921]	142	!------------------------------------------------------------------------------!
	143	! 3) Collection thickness of ice formed in leads and polynyas
	144	!------------------------------------------------------------------------------!
[865]	145	! hicol is the thickness of new ice formed in open water
	146	! hicol can be either prescribed (frazswi = 0)
	147	! or computed (frazswi = 1)
[825]	148	! Frazil ice forms in open water, is transported by wind
	149	! accumulates at the edge of the consolidated ice edge
	150	! where it forms aggregates of a specific thickness called
	151	! collection thickness.
	152
[865]	153	! Note : the following algorithm currently breaks vectorization
	154	!
	155
[3625]	156	zvrel(:,:) = 0._wp
[825]	157
	158	! Default new ice thickness
[4921]	159	hicol(:,:) = hiccrit
[825]	160
[4921]	161	IF( fraz_swi == 1 ) THEN
[825]	162
[921]	163	!--------------------
	164	! Physical constants
	165	!--------------------
[3625]	166	hicol(:,:) = 0._wp
[825]	167
[921]	168	zhicrit = 0.04 ! frazil ice thickness
	169	ztwogp = 2. * rau0 / ( grav * 0.3 * ( rau0 - rhoic ) ) ! reduced grav
	170	zsqcd = 1.0 / SQRT( 1.3 * cai ) ! 1/SQRT(airdensity*drag)
	171	zgamafr = 0.03
[825]	172
[4921]	173	DO jj = 2, jpj
	174	DO ji = 2, jpi
	175	IF ( qlead(ji,jj) < 0._wp ) THEN
[921]	176	!-------------
	177	! Wind stress
	178	!-------------
	179	! C-grid wind stress components
[3625]	180	ztaux = ( utau_ice(ji-1,jj ) * tmu(ji-1,jj ) &
	181	& + utau_ice(ji ,jj ) * tmu(ji ,jj ) ) * 0.5_wp
	182	ztauy = ( vtau_ice(ji ,jj-1) * tmv(ji ,jj-1) &
	183	& + vtau_ice(ji ,jj ) * tmv(ji ,jj ) ) * 0.5_wp
[921]	184	! Square root of wind stress
[4921]	185	ztenagm = SQRT( SQRT( ztaux2 + ztauy2 ) )
[825]	186
[921]	187	!---------------------
	188	! Frazil ice velocity
	189	!---------------------
[4921]	190	zindb = MAX( 0._wp, SIGN( 1._wp , ztenagm - epsi10 ) )
	191	zvfrx = zindb * zgamafr * zsqcd * ztaux / MAX( ztenagm, epsi10 )
	192	zvfry = zindb * zgamafr * zsqcd * ztauy / MAX( ztenagm, epsi10 )
[825]	193
[921]	194	!-------------------
	195	! Pack ice velocity
	196	!-------------------
	197	! C-grid ice velocity
[3625]	198	zindb = MAX( 0._wp, SIGN( 1._wp , at_i(ji,jj) ) )
	199	zvgx = zindb * ( u_ice(ji-1,jj ) * tmu(ji-1,jj ) &
	200	& + u_ice(ji,jj ) * tmu(ji ,jj ) ) * 0.5_wp
	201	zvgy = zindb * ( v_ice(ji ,jj-1) * tmv(ji ,jj-1) &
	202	& + v_ice(ji,jj ) * tmv(ji ,jj ) ) * 0.5_wp
[825]	203
[921]	204	!-----------------------------------
	205	! Relative frazil/pack ice velocity
	206	!-----------------------------------
	207	! absolute relative velocity
[3625]	208	zvrel2 = MAX( ( zvfrx - zvgx ) * ( zvfrx - zvgx ) &
	209	& + ( zvfry - zvgy ) * ( zvfry - zvgy ) , 0.15 * 0.15 )
	210	zvrel(ji,jj) = SQRT( zvrel2 )
[825]	211
[921]	212	!---------------------
	213	! Iterative procedure
	214	!---------------------
	215	hicol(ji,jj) = zhicrit + 0.1
[3625]	216	hicol(ji,jj) = zhicrit + hicol(ji,jj) &
	217	& / ( hicol(ji,jj) * hicol(ji,jj) - zhicrit * zhicrit ) * ztwogp * zvrel2
[825]	218
[3625]	219	!!gm better coding: above: hicol(ji,jj) * hicol(ji,jj) = (zhicrit + 0.1)*(zhicrit + 0.1)
	220	!!gm = zhicrit*2 + 0.2zhicrit +0.01
	221	!!gm therefore the 2 lines with hicol can be replaced by 1 line:
	222	!!gm hicol(ji,jj) = zhicrit + (zhicrit + 0.1) / ( 0.2 * zhicrit + 0.01 ) * ztwogp * zvrel2
	223	!!gm further more (zhicrit + 0.1)/(0.2 * zhicrit + 0.01 )*ztwogp can be computed one for all outside the DO loop
	224
[921]	225	iter = 1
	226	iterate_frazil = .true.
[825]	227
[921]	228	DO WHILE ( iter .LT. 100 .AND. iterate_frazil )
	229	zf = ( hicol(ji,jj) - zhicrit ) * ( hicol(ji,jj)2 - zhicrit2 ) &
	230	- hicol(ji,jj) * zhicrit * ztwogp * zvrel2
	231	zfp = ( hicol(ji,jj) - zhicrit ) * ( 3.0*hicol(ji,jj) + zhicrit ) &
	232	- zhicrit * ztwogp * zvrel2
	233	zhicol_new = hicol(ji,jj) - zf/zfp
	234	hicol(ji,jj) = zhicol_new
[825]	235
[921]	236	iter = iter + 1
[825]	237
[921]	238	END DO ! do while
[825]	239
[921]	240	ENDIF ! end of selection of pixels where ice forms
[825]	241
[921]	242	END DO ! loop on ji ends
	243	END DO ! loop on jj ends
[4921]	244	!
	245	CALL lbc_lnk( zvrel(:,:), 'T', 1. )
	246	CALL lbc_lnk( hicol(:,:), 'T', 1. )
[825]	247
	248	ENDIF ! End of computation of frazil ice collection thickness
	249
[921]	250	!------------------------------------------------------------------------------!
	251	! 4) Identify grid points where new ice forms
	252	!------------------------------------------------------------------------------!
[825]	253
	254	!-------------------------------------
	255	! Select points for new ice formation
	256	!-------------------------------------
	257	! This occurs if open water energy budget is negative
	258	nbpac = 0
[4921]	259	npac(:) = 0
	260	!
[825]	261	DO jj = 1, jpj
	262	DO ji = 1, jpi
[4921]	263	IF ( qlead(ji,jj) < 0._wp ) THEN
[825]	264	nbpac = nbpac + 1
	265	npac( nbpac ) = (jj - 1) * jpi + ji
	266	ENDIF
	267	END DO
	268	END DO
	269
[4333]	270	! debug point to follow
	271	jiindex_1d = 0
	272	IF( ln_nicep ) THEN
	273	DO ji = mi0(jiindx), mi1(jiindx)
	274	DO jj = mj0(jjindx), mj1(jjindx)
[4921]	275	IF ( qlead(ji,jj) < 0._wp ) THEN
[4333]	276	jiindex_1d = (jj - 1) * jpi + ji
	277	ENDIF
	278	END DO
	279	END DO
	280	ENDIF
	281
	282	IF( ln_nicep ) WRITE(numout,*) 'lim_thd_lac : nbpac = ', nbpac
[825]	283
	284	!------------------------------
	285	! Move from 2-D to 1-D vectors
	286	!------------------------------
	287	! If ocean gains heat do nothing
	288	! 0therwise compute new ice formation
	289
	290	IF ( nbpac > 0 ) THEN
	291
[4921]	292	CALL tab_2d_1d( nbpac, zat_i_1d (1:nbpac) , at_i , jpi, jpj, npac(1:nbpac) )
[921]	293	DO jl = 1, jpl
[4921]	294	CALL tab_2d_1d( nbpac, za_i_1d (1:nbpac,jl), a_i (:,:,jl), jpi, jpj, npac(1:nbpac) )
	295	CALL tab_2d_1d( nbpac, zv_i_1d (1:nbpac,jl), v_i (:,:,jl), jpi, jpj, npac(1:nbpac) )
	296	CALL tab_2d_1d( nbpac, zoa_i_1d (1:nbpac,jl), oa_i (:,:,jl), jpi, jpj, npac(1:nbpac) )
	297	CALL tab_2d_1d( nbpac, zsmv_i_1d(1:nbpac,jl), smv_i(:,:,jl), jpi, jpj, npac(1:nbpac) )
[921]	298	DO jk = 1, nlay_i
[4921]	299	CALL tab_2d_1d( nbpac, ze_i_1d(1:nbpac,jk,jl), e_i(:,:,jk,jl) , jpi, jpj, npac(1:nbpac) )
[921]	300	END DO ! jk
	301	END DO ! jl
[825]	302
[4921]	303	CALL tab_2d_1d( nbpac, qlead_1d (1:nbpac) , qlead , jpi, jpj, npac(1:nbpac) )
	304	CALL tab_2d_1d( nbpac, t_bo_1d (1:nbpac) , t_bo , jpi, jpj, npac(1:nbpac) )
	305	CALL tab_2d_1d( nbpac, sfx_opw_1d(1:nbpac) , sfx_opw, jpi, jpj, npac(1:nbpac) )
	306	CALL tab_2d_1d( nbpac, wfx_opw_1d(1:nbpac) , wfx_opw, jpi, jpj, npac(1:nbpac) )
	307	CALL tab_2d_1d( nbpac, hicol_1d (1:nbpac) , hicol , jpi, jpj, npac(1:nbpac) )
	308	CALL tab_2d_1d( nbpac, zvrel_1d (1:nbpac) , zvrel , jpi, jpj, npac(1:nbpac) )
[834]	309
[4921]	310	CALL tab_2d_1d( nbpac, hfx_thd_1d(1:nbpac) , hfx_thd, jpi, jpj, npac(1:nbpac) )
	311	CALL tab_2d_1d( nbpac, hfx_opw_1d(1:nbpac) , hfx_opw, jpi, jpj, npac(1:nbpac) )
	312
[921]	313	!------------------------------------------------------------------------------!
	314	! 5) Compute thickness, salinity, enthalpy, age, area and volume of new ice
	315	!------------------------------------------------------------------------------!
[825]	316
[4921]	317	!-----------------------------------------
	318	! Keep old ice areas and volume in memory
	319	!-----------------------------------------
	320	zv_b(1:nbpac,:) = zv_i_1d(1:nbpac,:)
	321	za_b(1:nbpac,:) = za_i_1d(1:nbpac,:)
[921]	322	!----------------------
	323	! Thickness of new ice
	324	!----------------------
	325	DO ji = 1, nbpac
[4921]	326	zh_newice(ji) = hiccrit
[921]	327	END DO
[4921]	328	IF( fraz_swi == 1 ) zh_newice(1:nbpac) = hicol_1d(1:nbpac)
[825]	329
[921]	330	!----------------------
	331	! Salinity of new ice
	332	!----------------------
[3625]	333	SELECT CASE ( num_sal )
	334	CASE ( 1 ) ! Sice = constant
[4921]	335	zs_newice(1:nbpac) = bulk_sal
[3625]	336	CASE ( 2 ) ! Sice = F(z,t) [Vancoppenolle et al (2005)]
[921]	337	DO ji = 1, nbpac
[4161]	338	ii = MOD( npac(ji) - 1 , jpi ) + 1
	339	ij = ( npac(ji) - 1 ) / jpi + 1
	340	zs_newice(ji) = MIN( 4.606 + 0.91 / zh_newice(ji) , s_i_max , 0.5 * sss_m(ii,ij) )
[3625]	341	END DO
	342	CASE ( 3 ) ! Sice = F(z) [multiyear ice]
[4921]	343	zs_newice(1:nbpac) = 2.3
[3625]	344	END SELECT
[825]	345
[921]	346	!-------------------------
	347	! Heat content of new ice
	348	!-------------------------
	349	! We assume that new ice is formed at the seawater freezing point
	350	DO ji = 1, nbpac
[3625]	351	ztmelts = - tmut * zs_newice(ji) + rtt ! Melting point (K)
[4921]	352	ze_newice(ji) = rhoic * ( cpic * ( ztmelts - t_bo_1d(ji) ) &
	353	& + lfus * ( 1.0 - ( ztmelts - rtt ) / MIN( t_bo_1d(ji) - rtt, -epsi10 ) ) &
[3625]	354	& - rcp * ( ztmelts - rtt ) )
[921]	355	END DO ! ji
[4921]	356
[921]	357	!----------------
	358	! Age of new ice
	359	!----------------
	360	DO ji = 1, nbpac
[3625]	361	zo_newice(ji) = 0._wp
[921]	362	END DO ! ji
[825]	363
[921]	364	!-------------------
	365	! Volume of new ice
	366	!-------------------
	367	DO ji = 1, nbpac
[825]	368
[4921]	369	zEi = - ze_newice(ji) / rhoic ! specific enthalpy of forming ice [J/kg]
	370
	371	zEw = rcp * ( t_bo_1d(ji) - rt0 ) ! specific enthalpy of seawater at t_bo_1d [J/kg]
	372	! clem: we suppose we are already at the freezing point (condition qlead<0 is satisfyied)
	373
	374	zdE = zEi - zEw ! specific enthalpy difference [J/kg]
	375
	376	zfmdt = - qlead_1d(ji) / zdE ! Fm.dt [kg/m2] (<0)
	377	! clem: we use qlead instead of zqld (limthd) because we suppose we are at the freezing point
	378	zv_newice(ji) = - zfmdt / rhoic
	379
	380	zQm = zfmdt * zEw ! heat to the ocean >0 associated with mass flux
	381
	382	! Contribution to heat flux to the ocean [W.m-2], >0
	383	hfx_thd_1d(ji) = hfx_thd_1d(ji) + zfmdt * zEw * r1_rdtice
	384	! Total heat flux used in this process [W.m-2]
	385	hfx_opw_1d(ji) = hfx_opw_1d(ji) - zfmdt * zdE * r1_rdtice
	386	! mass flux
	387	wfx_opw_1d(ji) = wfx_opw_1d(ji) - zv_newice(ji) * rhoic * r1_rdtice
	388	! salt flux
	389	sfx_opw_1d(ji) = sfx_opw_1d(ji) - zv_newice(ji) * rhoic * zs_newice(ji) * r1_rdtice
	390
[921]	391	! A fraction zfrazb of frazil ice is accreted at the ice bottom
[4921]	392	zinda = 1._wp - MAX( 0._wp, SIGN( 1._wp , - zat_i_1d(ji) ) )
	393	zfrazb = zinda * ( TANH ( Cfrazb * ( zvrel_1d(ji) - vfrazb ) ) + 1.0 ) * 0.5 * maxfrazb
	394	zv_frazb(ji) = zfrazb * zv_newice(ji)
[921]	395	zv_newice(ji) = ( 1.0 - zfrazb ) * zv_newice(ji)
	396	END DO
[865]	397
[921]	398	!-----------------
	399	! Area of new ice
	400	!-----------------
	401	DO ji = 1, nbpac
[3625]	402	za_newice(ji) = zv_newice(ji) / zh_newice(ji)
[4921]	403	END DO
[825]	404
[921]	405	!------------------------------------------------------------------------------!
	406	! 6) Redistribute new ice area and volume into ice categories !
	407	!------------------------------------------------------------------------------!
[825]	408
[4921]	409	!------------------------
	410	! 6.1) lateral ice growth
	411	!------------------------
[921]	412	! If lateral ice growth gives an ice concentration gt 1, then
[3625]	413	! we keep the excessive volume in memory and attribute it later to bottom accretion
[921]	414	DO ji = 1, nbpac
[4921]	415	IF ( za_newice(ji) > ( amax - zat_i_1d(ji) ) ) THEN
	416	zda_res(ji) = za_newice(ji) - ( amax - zat_i_1d(ji) )
[3625]	417	zdv_res(ji) = zda_res (ji) * zh_newice(ji)
	418	za_newice(ji) = za_newice(ji) - zda_res (ji)
	419	zv_newice(ji) = zv_newice(ji) - zdv_res (ji)
[921]	420	ELSE
[3625]	421	zda_res(ji) = 0._wp
	422	zdv_res(ji) = 0._wp
[921]	423	ENDIF
[4921]	424	END DO
[825]	425
[4921]	426	! find which category to fill
	427	zat_i_1d(:) = 0._wp
[921]	428	DO jl = 1, jpl
	429	DO ji = 1, nbpac
[4921]	430	IF( zh_newice(ji) > hi_max(jl-1) .AND. zh_newice(ji) <= hi_max(jl) ) THEN
	431	za_i_1d (ji,jl) = za_i_1d (ji,jl) + za_newice(ji)
	432	zv_i_1d (ji,jl) = zv_i_1d (ji,jl) + zv_newice(ji)
	433	jcat (ji) = jl
[921]	434	ENDIF
[4921]	435	zat_i_1d(ji) = zat_i_1d(ji) + za_i_1d (ji,jl)
[3625]	436	END DO
	437	END DO
[825]	438
[4921]	439	! Heat content
[921]	440	DO ji = 1, nbpac
[4921]	441	jl = jcat(ji) ! categroy in which new ice is put
	442	zswinew (ji) = MAX( 0._wp , SIGN( 1._wp , - za_b(ji,jl) ) ) ! 0 if old ice
[921]	443	END DO
[825]	444
[921]	445	DO jk = 1, nlay_i
	446	DO ji = 1, nbpac
[4921]	447	jl = jcat(ji)
	448	zinda = MAX( 0._wp, SIGN( 1._wp , zv_i_1d(ji,jl) - epsi20 ) )
	449	ze_i_1d(ji,jk,jl) = zswinew(ji) * ze_newice(ji) + &
	450	& ( 1.0 - zswinew(ji) ) * ( ze_newice(ji) * zv_newice(ji) + ze_i_1d(ji,jk,jl) * zv_b(ji,jl) ) &
	451	& * zinda / MAX( zv_i_1d(ji,jl), epsi20 )
[2715]	452	END DO
	453	END DO
[825]	454
[4921]	455	!------------------------------------------------
	456	! 6.2) bottom ice growth + ice enthalpy remapping
	457	!------------------------------------------------
	458	DO jl = 1, jpl
[825]	459
[4921]	460	! for remapping
	461	h_i_old (1:nbpac,0:nlay_i+1) = 0._wp
	462	qh_i_old(1:nbpac,0:nlay_i+1) = 0._wp
[921]	463	DO jk = 1, nlay_i
	464	DO ji = 1, nbpac
[4921]	465	h_i_old (ji,jk) = zv_i_1d(ji,jl) / REAL( nlay_i )
	466	qh_i_old(ji,jk) = ze_i_1d(ji,jk,jl) * h_i_old(ji,jk)
[2715]	467	END DO
	468	END DO
[4921]	469
	470	! new volumes including lateral/bottom accretion + residual
[921]	471	DO ji = 1, nbpac
[4921]	472	zinda = MAX( 0._wp, SIGN( 1._wp , zat_i_1d(ji) - epsi20 ) )
	473	zv_newfra = zinda * ( zdv_res(ji) + zv_frazb(ji) ) * za_i_1d(ji,jl) / MAX( zat_i_1d(ji) , epsi20 )
	474	za_i_1d(ji,jl) = zinda * za_i_1d(ji,jl)
	475	zv_i_1d(ji,jl) = zv_i_1d(ji,jl) + zv_newfra
	476	! for remapping
	477	h_i_old (ji,nlay_i+1) = zv_newfra
	478	qh_i_old(ji,nlay_i+1) = ze_newice(ji) * zv_newfra
	479	ENDDO
[921]	480
[4921]	481	! --- Ice enthalpy remapping --- !
	482	CALL lim_thd_ent( 1, nbpac, ze_i_1d(1:nbpac,:,jl) )
	483	ENDDO
[825]	484
[921]	485	!------------
	486	! Update age
	487	!------------
	488	DO jl = 1, jpl
	489	DO ji = 1, nbpac
[4921]	490	zindb = 1._wp - MAX( 0._wp , SIGN( 1._wp , - za_i_1d(ji,jl) + epsi20 ) ) ! 0 if no ice and 1 if yes
	491	zoa_i_1d(ji,jl) = za_b(ji,jl) * zoa_i_1d(ji,jl) / MAX( za_i_1d(ji,jl) , epsi20 ) * zindb
[2715]	492	END DO
	493	END DO
[825]	494
[921]	495	!-----------------
	496	! Update salinity
	497	!-----------------
[4161]	498	DO jl = 1, jpl
	499	DO ji = 1, nbpac
[4921]	500	zdv = zv_i_1d(ji,jl) - zv_b(ji,jl)
	501	zsmv_i_1d(ji,jl) = zsmv_i_1d(ji,jl) + zdv * zs_newice(ji)
	502	END DO
[4161]	503	END DO
	504
[921]	505	!------------------------------------------------------------------------------!
[4921]	506	! 7) Change 2D vectors to 1D vectors
[921]	507	!------------------------------------------------------------------------------!
	508	DO jl = 1, jpl
[4921]	509	CALL tab_1d_2d( nbpac, a_i (:,:,jl), npac(1:nbpac), za_i_1d (1:nbpac,jl), jpi, jpj )
	510	CALL tab_1d_2d( nbpac, v_i (:,:,jl), npac(1:nbpac), zv_i_1d (1:nbpac,jl), jpi, jpj )
	511	CALL tab_1d_2d( nbpac, oa_i(:,:,jl), npac(1:nbpac), zoa_i_1d(1:nbpac,jl), jpi, jpj )
	512	CALL tab_1d_2d( nbpac, smv_i (:,:,jl), npac(1:nbpac), zsmv_i_1d(1:nbpac,jl) , jpi, jpj )
[921]	513	DO jk = 1, nlay_i
[4921]	514	CALL tab_1d_2d( nbpac, e_i(:,:,jk,jl), npac(1:nbpac), ze_i_1d(1:nbpac,jk,jl), jpi, jpj )
[2715]	515	END DO
	516	END DO
[4921]	517	CALL tab_1d_2d( nbpac, sfx_opw, npac(1:nbpac), sfx_opw_1d(1:nbpac), jpi, jpj )
	518	CALL tab_1d_2d( nbpac, wfx_opw, npac(1:nbpac), wfx_opw_1d(1:nbpac), jpi, jpj )
	519
	520	CALL tab_1d_2d( nbpac, hfx_thd, npac(1:nbpac), hfx_thd_1d(1:nbpac), jpi, jpj )
	521	CALL tab_1d_2d( nbpac, hfx_opw, npac(1:nbpac), hfx_opw_1d(1:nbpac), jpi, jpj )
[2715]	522	!
[921]	523	ENDIF ! nbpac > 0
[825]	524
[921]	525	!------------------------------------------------------------------------------!
[4921]	526	! 8) Change units for e_i
[921]	527	!------------------------------------------------------------------------------!
[825]	528	DO jl = 1, jpl
[4921]	529	DO jk = 1, nlay_i
	530	DO jj = 1, jpj
	531	DO ji = 1, jpi
	532	! heat content in Joules
	533	e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * area(ji,jj) * v_i(ji,jj,jl) / ( REAL( nlay_i ,wp ) * unit_fac )
	534	END DO
	535	END DO
[825]	536	END DO
	537	END DO
	538
[2715]	539	!
[4921]	540	CALL wrk_dealloc( jpij, jcat ) ! integer
[3294]	541	CALL wrk_dealloc( jpij, zswinew, zv_newice, za_newice, zh_newice, ze_newice, zs_newice, zo_newice )
[4921]	542	CALL wrk_dealloc( jpij, zdv_res, zda_res, zat_i_1d, zv_frazb, zvrel_1d )
	543	CALL wrk_dealloc( jpij,jpl, zv_b, za_b, za_i_1d, zv_i_1d, zoa_i_1d, zsmv_i_1d )
	544	CALL wrk_dealloc( jpij,nlay_i+1,jpl, ze_i_1d )
	545	CALL wrk_dealloc( jpi,jpj, zvrel )
[2715]	546	!
[825]	547	END SUBROUTINE lim_thd_lac
	548
	549	#else
[2715]	550	!!----------------------------------------------------------------------
	551	!! Default option NO LIM3 sea-ice model
	552	!!----------------------------------------------------------------------
[825]	553	CONTAINS
	554	SUBROUTINE lim_thd_lac ! Empty routine
	555	END SUBROUTINE lim_thd_lac
	556	#endif
[2715]	557
	558	!!======================================================================
[825]	559	END MODULE limthd_lac

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