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limthd_lac.F90 @ 9295

Last change on this file since 9295 was 9295, checked in by jcastill, 6 years ago
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[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 ice ! LIM variables
	25	USE limtab ! LIM 2D <==> 1D
	26	USE limcons ! LIM conservation
	27	USE in_out_manager ! I/O manager
	28	USE lib_mpp ! MPP library
	29	USE wrk_nemo ! work arrays
[4833]	30	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
[3625]	31	USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined)
[4688]	32	USE limthd_ent
[5167]	33	USE limvar
[921]	34
[825]	35	IMPLICIT NONE
	36	PRIVATE
	37
	38	PUBLIC lim_thd_lac ! called by lim_thd
	39
	40	!!----------------------------------------------------------------------
[4161]	41	!! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011)
[1156]	42	!! $Id$
[2715]	43	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[825]	44	!!----------------------------------------------------------------------
	45	CONTAINS
[921]	46
[825]	47	SUBROUTINE lim_thd_lac
	48	!!-------------------------------------------------------------------
	49	!! * ROUTINE lim_thd_lac *
	50	!!
	51	!! ** Purpose : Computation of the evolution of the ice thickness and
	52	!! concentration as a function of the heat balance in the leads.
	53	!! It is only used for lateral accretion
	54	!!
	55	!! ** Method : Ice is formed in the open water when ocean lose heat
	56	!! (heat budget of open water Bl is negative) .
	57	!! Computation of the increase of 1-A (ice concentration) fol-
	58	!! lowing the law :
	59	!! (dA/dt)acc = F[ (1-A)/(1-a) ] * [ Bl / (Li*h0) ]
	60	!! where - h0 is the thickness of ice created in the lead
	61	!! - a is a minimum fraction for leads
	62	!! - F is a monotonic non-increasing function defined as:
	63	!! F(X)=( 1 - Xexld )(1.0/exld)
	64	!! - exld is the exponent closure rate (=2 default val.)
	65	!!
	66	!! ** Action : - Adjustment of snow and ice thicknesses and heat
	67	!! content in brine pockets
	68	!! - Updating ice internal temperature
	69	!! - Computation of variation of ice volume and mass
	70	!! - Computation of frldb after lateral accretion and
[4872]	71	!! update ht_s_1d, ht_i_1d and tbif_1d(:,:)
[825]	72	!!------------------------------------------------------------------------
[4869]	73	INTEGER :: ji,jj,jk,jl ! dummy loop indices
[4870]	74	INTEGER :: nbpac ! local integers
[4869]	75	INTEGER :: ii, ij, iter ! - -
[4990]	76	REAL(wp) :: ztmelts, zdv, zfrazb, zweight, zde ! local scalars
[2715]	77	REAL(wp) :: zgamafr, zvfrx, zvgx, ztaux, ztwogp, zf , zhicol_new ! - -
	78	REAL(wp) :: ztenagm, zvfry, zvgy, ztauy, zvrel2, zfp, zsqcd , zhicrit ! - -
	79	LOGICAL :: iterate_frazil ! iterate frazil ice collection thickness
	80	CHARACTER (len = 15) :: fieldid
[4688]	81
	82	REAL(wp) :: zQm ! enthalpy exchanged with the ocean (J/m2, >0 towards ocean)
	83	REAL(wp) :: zEi ! sea ice specific enthalpy (J/kg)
	84	REAL(wp) :: zEw ! seawater specific enthalpy (J/kg)
	85	REAL(wp) :: zfmdt ! mass flux x time step (kg/m2, >0 towards ocean)
	86
	87	REAL(wp) :: zv_newfra
	88
[4872]	89	INTEGER , POINTER, DIMENSION(:) :: jcat ! indexes of categories where new ice grows
[3294]	90	REAL(wp), POINTER, DIMENSION(:) :: zswinew ! switch for new ice or not
[825]	91
[3294]	92	REAL(wp), POINTER, DIMENSION(:) :: zv_newice ! volume of accreted ice
	93	REAL(wp), POINTER, DIMENSION(:) :: za_newice ! fractional area of accreted ice
	94	REAL(wp), POINTER, DIMENSION(:) :: zh_newice ! thickness of accreted ice
	95	REAL(wp), POINTER, DIMENSION(:) :: ze_newice ! heat content of accreted ice
	96	REAL(wp), POINTER, DIMENSION(:) :: zs_newice ! salinity of accreted ice
	97	REAL(wp), POINTER, DIMENSION(:) :: zo_newice ! age of accreted ice
	98	REAL(wp), POINTER, DIMENSION(:) :: zdv_res ! residual volume in case of excessive heat budget
	99	REAL(wp), POINTER, DIMENSION(:) :: zda_res ! residual area in case of excessive heat budget
[4688]	100	REAL(wp), POINTER, DIMENSION(:) :: zat_i_1d ! total ice fraction
[4872]	101	REAL(wp), POINTER, DIMENSION(:) :: zv_frazb ! accretion of frazil ice at the ice bottom
[4688]	102	REAL(wp), POINTER, DIMENSION(:) :: zvrel_1d ! relative ice / frazil velocity (1D vector)
[825]	103
[4872]	104	REAL(wp), POINTER, DIMENSION(:,:) :: zv_b ! old volume of ice in category jl
	105	REAL(wp), POINTER, DIMENSION(:,:) :: za_b ! old area of ice in category jl
	106	REAL(wp), POINTER, DIMENSION(:,:) :: za_i_1d ! 1-D version of a_i
	107	REAL(wp), POINTER, DIMENSION(:,:) :: zv_i_1d ! 1-D version of v_i
	108	REAL(wp), POINTER, DIMENSION(:,:) :: zsmv_i_1d ! 1-D version of smv_i
[825]	109
[4990]	110	REAL(wp), POINTER, DIMENSION(:,:,:) :: ze_i_1d !: 1-D version of e_i
[825]	111
[3294]	112	REAL(wp), POINTER, DIMENSION(:,:) :: zvrel ! relative ice / frazil velocity
[5123]	113
	114	REAL(wp) :: zcai = 1.4e-3_wp
[3294]	115	!!-----------------------------------------------------------------------!
[825]	116
[4688]	117	CALL wrk_alloc( jpij, jcat ) ! integer
[3294]	118	CALL wrk_alloc( jpij, zswinew, zv_newice, za_newice, zh_newice, ze_newice, zs_newice, zo_newice )
[4869]	119	CALL wrk_alloc( jpij, zdv_res, zda_res, zat_i_1d, zv_frazb, zvrel_1d )
[5202]	120	CALL wrk_alloc( jpij,jpl, zv_b, za_b, za_i_1d, zv_i_1d, zsmv_i_1d )
[5182]	121	CALL wrk_alloc( jpij,nlay_i,jpl, ze_i_1d )
[4688]	122	CALL wrk_alloc( jpi,jpj, zvrel )
[3294]	123
[5167]	124	CALL lim_var_agg(1)
	125	CALL lim_var_glo2eqv
[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]
[5134]	134	rswitch = MAX( 0._wp , SIGN( 1._wp , v_i(ji,jj,jl) - epsi20 ) ) !0 if no ice
[5123]	135	e_i(ji,jj,jk,jl) = rswitch * e_i(ji,jj,jk,jl) / MAX( v_i(ji,jj,jl), epsi20 ) * REAL( nlay_i, wp )
[921]	136	END DO
[825]	137	END DO
[921]	138	END DO
[825]	139	END DO
	140
[921]	141	!------------------------------------------------------------------------------!
	142	! 3) Collection thickness of ice formed in leads and polynyas
	143	!------------------------------------------------------------------------------!
[865]	144	! hicol is the thickness of new ice formed in open water
	145	! hicol can be either prescribed (frazswi = 0)
	146	! or computed (frazswi = 1)
[825]	147	! Frazil ice forms in open water, is transported by wind
	148	! accumulates at the edge of the consolidated ice edge
	149	! where it forms aggregates of a specific thickness called
	150	! collection thickness.
	151
[865]	152	! Note : the following algorithm currently breaks vectorization
	153	!
	154
[3625]	155	zvrel(:,:) = 0._wp
[825]	156
	157	! Default new ice thickness
[5123]	158	hicol(:,:) = rn_hnewice
[825]	159
[5123]	160	IF( ln_frazil ) THEN
[825]	161
[921]	162	!--------------------
	163	! Physical constants
	164	!--------------------
[3625]	165	hicol(:,:) = 0._wp
[825]	166
[921]	167	zhicrit = 0.04 ! frazil ice thickness
	168	ztwogp = 2. * rau0 / ( grav * 0.3 * ( rau0 - rhoic ) ) ! reduced grav
[5123]	169	zsqcd = 1.0 / SQRT( 1.3 * zcai ) ! 1/SQRT(airdensity*drag)
[921]	170	zgamafr = 0.03
[825]	171
[4833]	172	DO jj = 2, jpj
	173	DO ji = 2, jpi
[4688]	174	IF ( qlead(ji,jj) < 0._wp ) THEN
[921]	175	!-------------
	176	! Wind stress
	177	!-------------
	178	! C-grid wind stress components
[5123]	179	ztaux = ( utau_ice(ji-1,jj ) * umask(ji-1,jj ,1) &
	180	& + utau_ice(ji ,jj ) * umask(ji ,jj ,1) ) * 0.5_wp
	181	ztauy = ( vtau_ice(ji ,jj-1) * vmask(ji ,jj-1,1) &
	182	& + vtau_ice(ji ,jj ) * vmask(ji ,jj ,1) ) * 0.5_wp
[921]	183	! Square root of wind stress
[4688]	184	ztenagm = SQRT( SQRT( ztaux2 + ztauy2 ) )
[825]	185
[921]	186	!---------------------
	187	! Frazil ice velocity
	188	!---------------------
[4990]	189	rswitch = MAX( 0._wp, SIGN( 1._wp , ztenagm - epsi10 ) )
	190	zvfrx = rswitch * zgamafr * zsqcd * ztaux / MAX( ztenagm, epsi10 )
	191	zvfry = rswitch * zgamafr * zsqcd * ztauy / MAX( ztenagm, epsi10 )
[825]	192
[921]	193	!-------------------
	194	! Pack ice velocity
	195	!-------------------
	196	! C-grid ice velocity
[4990]	197	rswitch = MAX( 0._wp, SIGN( 1._wp , at_i(ji,jj) ) )
[5123]	198	zvgx = rswitch * ( u_ice(ji-1,jj ) * umask(ji-1,jj ,1) + u_ice(ji,jj) * umask(ji,jj,1) ) * 0.5_wp
	199	zvgy = rswitch * ( v_ice(ji ,jj-1) * vmask(ji ,jj-1,1) + v_ice(ji,jj) * vmask(ji,jj,1) ) * 0.5_wp
[825]	200
[921]	201	!-----------------------------------
	202	! Relative frazil/pack ice velocity
	203	!-----------------------------------
	204	! absolute relative velocity
[3625]	205	zvrel2 = MAX( ( zvfrx - zvgx ) * ( zvfrx - zvgx ) &
	206	& + ( zvfry - zvgy ) * ( zvfry - zvgy ) , 0.15 * 0.15 )
	207	zvrel(ji,jj) = SQRT( zvrel2 )
[825]	208
[921]	209	!---------------------
	210	! Iterative procedure
	211	!---------------------
	212	hicol(ji,jj) = zhicrit + 0.1
[3625]	213	hicol(ji,jj) = zhicrit + hicol(ji,jj) &
	214	& / ( hicol(ji,jj) * hicol(ji,jj) - zhicrit * zhicrit ) * ztwogp * zvrel2
[825]	215
[3625]	216	!!gm better coding: above: hicol(ji,jj) * hicol(ji,jj) = (zhicrit + 0.1)*(zhicrit + 0.1)
	217	!!gm = zhicrit*2 + 0.2zhicrit +0.01
	218	!!gm therefore the 2 lines with hicol can be replaced by 1 line:
	219	!!gm hicol(ji,jj) = zhicrit + (zhicrit + 0.1) / ( 0.2 * zhicrit + 0.01 ) * ztwogp * zvrel2
	220	!!gm further more (zhicrit + 0.1)/(0.2 * zhicrit + 0.01 )*ztwogp can be computed one for all outside the DO loop
	221
[921]	222	iter = 1
	223	iterate_frazil = .true.
[825]	224
[5123]	225	DO WHILE ( iter < 100 .AND. iterate_frazil )
[921]	226	zf = ( hicol(ji,jj) - zhicrit ) * ( hicol(ji,jj)2 - zhicrit2 ) &
	227	- hicol(ji,jj) * zhicrit * ztwogp * zvrel2
	228	zfp = ( hicol(ji,jj) - zhicrit ) * ( 3.0*hicol(ji,jj) + zhicrit ) &
	229	- zhicrit * ztwogp * zvrel2
	230	zhicol_new = hicol(ji,jj) - zf/zfp
	231	hicol(ji,jj) = zhicol_new
[825]	232
[921]	233	iter = iter + 1
[825]	234
[921]	235	END DO ! do while
[825]	236
[921]	237	ENDIF ! end of selection of pixels where ice forms
[825]	238
[921]	239	END DO ! loop on ji ends
	240	END DO ! loop on jj ends
[4833]	241	!
	242	CALL lbc_lnk( zvrel(:,:), 'T', 1. )
	243	CALL lbc_lnk( hicol(:,:), 'T', 1. )
[825]	244
	245	ENDIF ! End of computation of frazil ice collection thickness
	246
[921]	247	!------------------------------------------------------------------------------!
	248	! 4) Identify grid points where new ice forms
	249	!------------------------------------------------------------------------------!
[825]	250
	251	!-------------------------------------
	252	! Select points for new ice formation
	253	!-------------------------------------
	254	! This occurs if open water energy budget is negative
	255	nbpac = 0
[4833]	256	npac(:) = 0
	257	!
[825]	258	DO jj = 1, jpj
	259	DO ji = 1, jpi
[4688]	260	IF ( qlead(ji,jj) < 0._wp ) THEN
[825]	261	nbpac = nbpac + 1
	262	npac( nbpac ) = (jj - 1) * jpi + ji
	263	ENDIF
	264	END DO
	265	END DO
	266
[4333]	267	! debug point to follow
	268	jiindex_1d = 0
[5128]	269	IF( ln_icectl ) THEN
	270	DO ji = mi0(iiceprt), mi1(iiceprt)
	271	DO jj = mj0(jiceprt), mj1(jiceprt)
[4688]	272	IF ( qlead(ji,jj) < 0._wp ) THEN
[4333]	273	jiindex_1d = (jj - 1) * jpi + ji
	274	ENDIF
	275	END DO
	276	END DO
	277	ENDIF
	278
[5128]	279	IF( ln_icectl ) WRITE(numout,*) 'lim_thd_lac : nbpac = ', nbpac
[825]	280
	281	!------------------------------
	282	! Move from 2-D to 1-D vectors
	283	!------------------------------
	284	! If ocean gains heat do nothing
	285	! 0therwise compute new ice formation
	286
	287	IF ( nbpac > 0 ) THEN
	288
[4688]	289	CALL tab_2d_1d( nbpac, zat_i_1d (1:nbpac) , at_i , jpi, jpj, npac(1:nbpac) )
[921]	290	DO jl = 1, jpl
[4688]	291	CALL tab_2d_1d( nbpac, za_i_1d (1:nbpac,jl), a_i (:,:,jl), jpi, jpj, npac(1:nbpac) )
	292	CALL tab_2d_1d( nbpac, zv_i_1d (1:nbpac,jl), v_i (:,:,jl), jpi, jpj, npac(1:nbpac) )
	293	CALL tab_2d_1d( nbpac, zsmv_i_1d(1:nbpac,jl), smv_i(:,:,jl), jpi, jpj, npac(1:nbpac) )
[921]	294	DO jk = 1, nlay_i
[4688]	295	CALL tab_2d_1d( nbpac, ze_i_1d(1:nbpac,jk,jl), e_i(:,:,jk,jl) , jpi, jpj, npac(1:nbpac) )
[5202]	296	END DO
	297	END DO
[825]	298
[4688]	299	CALL tab_2d_1d( nbpac, qlead_1d (1:nbpac) , qlead , jpi, jpj, npac(1:nbpac) )
[4872]	300	CALL tab_2d_1d( nbpac, t_bo_1d (1:nbpac) , t_bo , jpi, jpj, npac(1:nbpac) )
[4688]	301	CALL tab_2d_1d( nbpac, sfx_opw_1d(1:nbpac) , sfx_opw, jpi, jpj, npac(1:nbpac) )
	302	CALL tab_2d_1d( nbpac, wfx_opw_1d(1:nbpac) , wfx_opw, jpi, jpj, npac(1:nbpac) )
[4872]	303	CALL tab_2d_1d( nbpac, hicol_1d (1:nbpac) , hicol , jpi, jpj, npac(1:nbpac) )
[4688]	304	CALL tab_2d_1d( nbpac, zvrel_1d (1:nbpac) , zvrel , jpi, jpj, npac(1:nbpac) )
[834]	305
[4688]	306	CALL tab_2d_1d( nbpac, hfx_thd_1d(1:nbpac) , hfx_thd, jpi, jpj, npac(1:nbpac) )
	307	CALL tab_2d_1d( nbpac, hfx_opw_1d(1:nbpac) , hfx_opw, jpi, jpj, npac(1:nbpac) )
	308
[921]	309	!------------------------------------------------------------------------------!
	310	! 5) Compute thickness, salinity, enthalpy, age, area and volume of new ice
	311	!------------------------------------------------------------------------------!
[825]	312
[4688]	313	!-----------------------------------------
	314	! Keep old ice areas and volume in memory
	315	!-----------------------------------------
[4872]	316	zv_b(1:nbpac,:) = zv_i_1d(1:nbpac,:)
	317	za_b(1:nbpac,:) = za_i_1d(1:nbpac,:)
[921]	318	!----------------------
	319	! Thickness of new ice
	320	!----------------------
	321	DO ji = 1, nbpac
[5123]	322	zh_newice(ji) = rn_hnewice
[921]	323	END DO
[5123]	324	IF( ln_frazil ) zh_newice(1:nbpac) = hicol_1d(1:nbpac)
[825]	325
[921]	326	!----------------------
	327	! Salinity of new ice
	328	!----------------------
[5123]	329	SELECT CASE ( nn_icesal )
[3625]	330	CASE ( 1 ) ! Sice = constant
[5123]	331	zs_newice(1:nbpac) = rn_icesal
[3625]	332	CASE ( 2 ) ! Sice = F(z,t) [Vancoppenolle et al (2005)]
[921]	333	DO ji = 1, nbpac
[4161]	334	ii = MOD( npac(ji) - 1 , jpi ) + 1
	335	ij = ( npac(ji) - 1 ) / jpi + 1
[5123]	336	zs_newice(ji) = MIN( 4.606 + 0.91 / zh_newice(ji) , rn_simax , 0.5 * sss_m(ii,ij) )
[3625]	337	END DO
	338	CASE ( 3 ) ! Sice = F(z) [multiyear ice]
[4833]	339	zs_newice(1:nbpac) = 2.3
[3625]	340	END SELECT
[825]	341
[921]	342	!-------------------------
	343	! Heat content of new ice
	344	!-------------------------
	345	! We assume that new ice is formed at the seawater freezing point
	346	DO ji = 1, nbpac
[5123]	347	ztmelts = - tmut * zs_newice(ji) + rt0 ! Melting point (K)
[4872]	348	ze_newice(ji) = rhoic * ( cpic * ( ztmelts - t_bo_1d(ji) ) &
[5123]	349	& + lfus * ( 1.0 - ( ztmelts - rt0 ) / MIN( t_bo_1d(ji) - rt0, -epsi10 ) ) &
	350	& - rcp * ( ztmelts - rt0 ) )
	351	END DO
[4688]	352
[921]	353	!----------------
	354	! Age of new ice
	355	!----------------
	356	DO ji = 1, nbpac
[3625]	357	zo_newice(ji) = 0._wp
[5202]	358	END DO
[825]	359
[921]	360	!-------------------
	361	! Volume of new ice
	362	!-------------------
	363	DO ji = 1, nbpac
[825]	364
[5123]	365	zEi = - ze_newice(ji) * r1_rhoic ! specific enthalpy of forming ice [J/kg]
[4688]	366
[5123]	367	zEw = rcp * ( t_bo_1d(ji) - rt0 ) ! specific enthalpy of seawater at t_bo_1d [J/kg]
[4688]	368	! clem: we suppose we are already at the freezing point (condition qlead<0 is satisfyied)
	369
	370	zdE = zEi - zEw ! specific enthalpy difference [J/kg]
	371
	372	zfmdt = - qlead_1d(ji) / zdE ! Fm.dt [kg/m2] (<0)
	373	! clem: we use qlead instead of zqld (limthd) because we suppose we are at the freezing point
[5123]	374	zv_newice(ji) = - zfmdt * r1_rhoic
[4688]	375
	376	zQm = zfmdt * zEw ! heat to the ocean >0 associated with mass flux
	377
	378	! Contribution to heat flux to the ocean [W.m-2], >0
	379	hfx_thd_1d(ji) = hfx_thd_1d(ji) + zfmdt * zEw * r1_rdtice
	380	! Total heat flux used in this process [W.m-2]
	381	hfx_opw_1d(ji) = hfx_opw_1d(ji) - zfmdt * zdE * r1_rdtice
	382	! mass flux
	383	wfx_opw_1d(ji) = wfx_opw_1d(ji) - zv_newice(ji) * rhoic * r1_rdtice
	384	! salt flux
	385	sfx_opw_1d(ji) = sfx_opw_1d(ji) - zv_newice(ji) * rhoic * zs_newice(ji) * r1_rdtice
	386
[921]	387	! A fraction zfrazb of frazil ice is accreted at the ice bottom
[4990]	388	rswitch = 1._wp - MAX( 0._wp, SIGN( 1._wp , - zat_i_1d(ji) ) )
[5123]	389	zfrazb = rswitch * ( TANH ( rn_Cfrazb * ( zvrel_1d(ji) - rn_vfrazb ) ) + 1.0 ) * 0.5 * rn_maxfrazb
[4688]	390	zv_frazb(ji) = zfrazb * zv_newice(ji)
[921]	391	zv_newice(ji) = ( 1.0 - zfrazb ) * zv_newice(ji)
	392	END DO
[865]	393
[921]	394	!-----------------
	395	! Area of new ice
	396	!-----------------
	397	DO ji = 1, nbpac
[3625]	398	za_newice(ji) = zv_newice(ji) / zh_newice(ji)
[4688]	399	END DO
[825]	400
[921]	401	!------------------------------------------------------------------------------!
	402	! 6) Redistribute new ice area and volume into ice categories !
	403	!------------------------------------------------------------------------------!
[825]	404
[4688]	405	!------------------------
	406	! 6.1) lateral ice growth
	407	!------------------------
[921]	408	! If lateral ice growth gives an ice concentration gt 1, then
[3625]	409	! we keep the excessive volume in memory and attribute it later to bottom accretion
[921]	410	DO ji = 1, nbpac
[5123]	411	IF ( za_newice(ji) > ( rn_amax - zat_i_1d(ji) ) ) THEN
	412	zda_res(ji) = za_newice(ji) - ( rn_amax - zat_i_1d(ji) )
[3625]	413	zdv_res(ji) = zda_res (ji) * zh_newice(ji)
	414	za_newice(ji) = za_newice(ji) - zda_res (ji)
	415	zv_newice(ji) = zv_newice(ji) - zdv_res (ji)
[921]	416	ELSE
[3625]	417	zda_res(ji) = 0._wp
	418	zdv_res(ji) = 0._wp
[921]	419	ENDIF
[4688]	420	END DO
[825]	421
[4688]	422	! find which category to fill
	423	zat_i_1d(:) = 0._wp
[921]	424	DO jl = 1, jpl
	425	DO ji = 1, nbpac
[4688]	426	IF( zh_newice(ji) > hi_max(jl-1) .AND. zh_newice(ji) <= hi_max(jl) ) THEN
	427	za_i_1d (ji,jl) = za_i_1d (ji,jl) + za_newice(ji)
	428	zv_i_1d (ji,jl) = zv_i_1d (ji,jl) + zv_newice(ji)
	429	jcat (ji) = jl
[921]	430	ENDIF
[4688]	431	zat_i_1d(ji) = zat_i_1d(ji) + za_i_1d (ji,jl)
[3625]	432	END DO
	433	END DO
[825]	434
[4688]	435	! Heat content
[921]	436	DO ji = 1, nbpac
[4688]	437	jl = jcat(ji) ! categroy in which new ice is put
[4872]	438	zswinew (ji) = MAX( 0._wp , SIGN( 1._wp , - za_b(ji,jl) ) ) ! 0 if old ice
[921]	439	END DO
[825]	440
[921]	441	DO jk = 1, nlay_i
	442	DO ji = 1, nbpac
[4688]	443	jl = jcat(ji)
[4990]	444	rswitch = MAX( 0._wp, SIGN( 1._wp , zv_i_1d(ji,jl) - epsi20 ) )
[4688]	445	ze_i_1d(ji,jk,jl) = zswinew(ji) * ze_newice(ji) + &
[4872]	446	& ( 1.0 - zswinew(ji) ) * ( ze_newice(ji) * zv_newice(ji) + ze_i_1d(ji,jk,jl) * zv_b(ji,jl) ) &
[4990]	447	& * rswitch / MAX( zv_i_1d(ji,jl), epsi20 )
[2715]	448	END DO
	449	END DO
[825]	450
[4688]	451	!------------------------------------------------
	452	! 6.2) bottom ice growth + ice enthalpy remapping
	453	!------------------------------------------------
	454	DO jl = 1, jpl
[825]	455
[4688]	456	! for remapping
	457	h_i_old (1:nbpac,0:nlay_i+1) = 0._wp
	458	qh_i_old(1:nbpac,0:nlay_i+1) = 0._wp
[921]	459	DO jk = 1, nlay_i
	460	DO ji = 1, nbpac
[5123]	461	h_i_old (ji,jk) = zv_i_1d(ji,jl) * r1_nlay_i
[4688]	462	qh_i_old(ji,jk) = ze_i_1d(ji,jk,jl) * h_i_old(ji,jk)
[2715]	463	END DO
	464	END DO
[4688]	465
	466	! new volumes including lateral/bottom accretion + residual
[921]	467	DO ji = 1, nbpac
[4990]	468	rswitch = MAX( 0._wp, SIGN( 1._wp , zat_i_1d(ji) - epsi20 ) )
	469	zv_newfra = rswitch * ( zdv_res(ji) + zv_frazb(ji) ) * za_i_1d(ji,jl) / MAX( zat_i_1d(ji) , epsi20 )
	470	za_i_1d(ji,jl) = rswitch * za_i_1d(ji,jl)
[4688]	471	zv_i_1d(ji,jl) = zv_i_1d(ji,jl) + zv_newfra
	472	! for remapping
	473	h_i_old (ji,nlay_i+1) = zv_newfra
	474	qh_i_old(ji,nlay_i+1) = ze_newice(ji) * zv_newfra
	475	ENDDO
	476	! --- Ice enthalpy remapping --- !
[4833]	477	CALL lim_thd_ent( 1, nbpac, ze_i_1d(1:nbpac,:,jl) )
[4688]	478	ENDDO
	479
[921]	480	!-----------------
	481	! Update salinity
	482	!-----------------
[4161]	483	DO jl = 1, jpl
	484	DO ji = 1, nbpac
[4872]	485	zdv = zv_i_1d(ji,jl) - zv_b(ji,jl)
[4688]	486	zsmv_i_1d(ji,jl) = zsmv_i_1d(ji,jl) + zdv * zs_newice(ji)
	487	END DO
[4161]	488	END DO
	489
[921]	490	!------------------------------------------------------------------------------!
[4688]	491	! 7) Change 2D vectors to 1D vectors
[921]	492	!------------------------------------------------------------------------------!
	493	DO jl = 1, jpl
[4688]	494	CALL tab_1d_2d( nbpac, a_i (:,:,jl), npac(1:nbpac), za_i_1d (1:nbpac,jl), jpi, jpj )
	495	CALL tab_1d_2d( nbpac, v_i (:,:,jl), npac(1:nbpac), zv_i_1d (1:nbpac,jl), jpi, jpj )
	496	CALL tab_1d_2d( nbpac, smv_i (:,:,jl), npac(1:nbpac), zsmv_i_1d(1:nbpac,jl) , jpi, jpj )
[921]	497	DO jk = 1, nlay_i
[4688]	498	CALL tab_1d_2d( nbpac, e_i(:,:,jk,jl), npac(1:nbpac), ze_i_1d(1:nbpac,jk,jl), jpi, jpj )
[2715]	499	END DO
	500	END DO
[4688]	501	CALL tab_1d_2d( nbpac, sfx_opw, npac(1:nbpac), sfx_opw_1d(1:nbpac), jpi, jpj )
	502	CALL tab_1d_2d( nbpac, wfx_opw, npac(1:nbpac), wfx_opw_1d(1:nbpac), jpi, jpj )
	503
	504	CALL tab_1d_2d( nbpac, hfx_thd, npac(1:nbpac), hfx_thd_1d(1:nbpac), jpi, jpj )
	505	CALL tab_1d_2d( nbpac, hfx_opw, npac(1:nbpac), hfx_opw_1d(1:nbpac), jpi, jpj )
[2715]	506	!
[921]	507	ENDIF ! nbpac > 0
[825]	508
[921]	509	!------------------------------------------------------------------------------!
[4688]	510	! 8) Change units for e_i
[921]	511	!------------------------------------------------------------------------------!
[825]	512	DO jl = 1, jpl
[4688]	513	DO jk = 1, nlay_i
	514	DO jj = 1, jpj
	515	DO ji = 1, jpi
[5123]	516	! heat content in J/m2
	517	e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * v_i(ji,jj,jl) * r1_nlay_i
[4688]	518	END DO
	519	END DO
[825]	520	END DO
	521	END DO
	522
[2715]	523	!
[4688]	524	CALL wrk_dealloc( jpij, jcat ) ! integer
[3294]	525	CALL wrk_dealloc( jpij, zswinew, zv_newice, za_newice, zh_newice, ze_newice, zs_newice, zo_newice )
[4869]	526	CALL wrk_dealloc( jpij, zdv_res, zda_res, zat_i_1d, zv_frazb, zvrel_1d )
[5202]	527	CALL wrk_dealloc( jpij,jpl, zv_b, za_b, za_i_1d, zv_i_1d, zsmv_i_1d )
[5182]	528	CALL wrk_dealloc( jpij,nlay_i,jpl, ze_i_1d )
[4688]	529	CALL wrk_dealloc( jpi,jpj, zvrel )
[2715]	530	!
[825]	531	END SUBROUTINE lim_thd_lac
	532
	533	#else
[2715]	534	!!----------------------------------------------------------------------
	535	!! Default option NO LIM3 sea-ice model
	536	!!----------------------------------------------------------------------
[825]	537	CONTAINS
	538	SUBROUTINE lim_thd_lac ! Empty routine
	539	END SUBROUTINE lim_thd_lac
	540	#endif
[2715]	541
	542	!!======================================================================
[825]	543	END MODULE limthd_lac

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source: branches/UKMO/r6232_tracer_advection/NEMOGCM/NEMO/LIM_SRC_3/limthd_lac.F90 @ 9295

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