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sbcblk_core.F90 in branches/UKMO/dev_1d_bugfixes_tocommit/NEMOGCM/NEMO/OPA_SRC/SBC – NEMO

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source: branches/UKMO/dev_1d_bugfixes_tocommit/NEMOGCM/NEMO/OPA_SRC/SBC/sbcblk_core.F90 @ 13320

Last change on this file since 13320 was 13191, checked in by jwhile, 4 years ago
Updates for 1d runnig
File size: 51.5 KB

Rev	Line
[888]	1	MODULE sbcblk_core
	2	!!======================================================================
	3	!! * MODULE sbcblk_core *
	4	!! Ocean forcing: momentum, heat and freshwater flux formulation
	5	!!=====================================================================
[1482]	6	!! History : 1.0 ! 2004-08 (U. Schweckendiek) Original code
[4990]	7	!! 2.0 ! 2005-04 (L. Brodeau, A.M. Treguier) additions:
[1482]	8	!! - new bulk routine for efficiency
	9	!! - WINDS ARE NOW ASSUMED TO BE AT T POINTS in input files !!!!
[4990]	10	!! - file names and file characteristics in namelist
	11	!! - Implement reading of 6-hourly fields
	12	!! 3.0 ! 2006-06 (G. Madec) sbc rewritting
	13	!! - ! 2006-12 (L. Brodeau) Original code for turb_core_2z
[1482]	14	!! 3.2 ! 2009-04 (B. Lemaire) Introduce iom_put
[2528]	15	!! 3.3 ! 2010-10 (S. Masson) add diurnal cycle
[3294]	16	!! 3.4 ! 2011-11 (C. Harris) Fill arrays required by CICE
[4990]	17	!! 3.7 ! 2014-06 (L. Brodeau) simplification and optimization of CORE bulk
[888]	18	!!----------------------------------------------------------------------
	19
	20	!!----------------------------------------------------------------------
[4990]	21	!! sbc_blk_core : bulk formulation as ocean surface boundary condition (forced mode, CORE bulk formulea)
	22	!! blk_oce_core : computes momentum, heat and freshwater fluxes over ocean
	23	!! blk_ice_core : computes momentum, heat and freshwater fluxes over ice
	24	!! turb_core_2z : Computes turbulent transfert coefficients
	25	!! cd_neutral_10m : Estimate of the neutral drag coefficient at 10m
	26	!! psi_m : universal profile stability function for momentum
	27	!! psi_h : universal profile stability function for temperature and humidity
[888]	28	!!----------------------------------------------------------------------
	29	USE oce ! ocean dynamics and tracers
	30	USE dom_oce ! ocean space and time domain
	31	USE phycst ! physical constants
	32	USE fldread ! read input fields
	33	USE sbc_oce ! Surface boundary condition: ocean fields
[3680]	34	USE cyclone ! Cyclone 10m wind form trac of cyclone centres
[2528]	35	USE sbcdcy ! surface boundary condition: diurnal cycle
[888]	36	USE iom ! I/O manager library
	37	USE in_out_manager ! I/O manager
	38	USE lib_mpp ! distribued memory computing library
[3294]	39	USE wrk_nemo ! work arrays
	40	USE timing ! Timing
[888]	41	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
	42	USE prtctl ! Print control
[4990]	43	USE sbcwave, ONLY : cdn_wave ! wave module
[1465]	44	USE sbc_ice ! Surface boundary condition: ice fields
[4161]	45	USE lib_fortran ! to use key_nosignedzero
[5407]	46	#if defined key_lim3
	47	USE ice, ONLY : u_ice, v_ice, jpl, pfrld, a_i_b
	48	USE limthd_dh ! for CALL lim_thd_snwblow
	49	#elif defined key_lim2
	50	USE ice_2, ONLY : u_ice, v_ice
	51	USE par_ice_2
	52	#endif
[11442]	53	USE stopack
[888]	54
	55	IMPLICIT NONE
	56	PRIVATE
	57
[2715]	58	PUBLIC sbc_blk_core ! routine called in sbcmod module
[5407]	59	#if defined key_lim2 \|\| defined key_lim3
	60	PUBLIC blk_ice_core_tau ! routine called in sbc_ice_lim module
	61	PUBLIC blk_ice_core_flx ! routine called in sbc_ice_lim module
	62	#endif
[3294]	63	PUBLIC turb_core_2z ! routine calles in sbcblk_mfs module
[2715]	64
[4990]	65	INTEGER , PARAMETER :: jpfld = 9 ! maximum number of files to read
[888]	66	INTEGER , PARAMETER :: jp_wndi = 1 ! index of 10m wind velocity (i-component) (m/s) at T-point
	67	INTEGER , PARAMETER :: jp_wndj = 2 ! index of 10m wind velocity (j-component) (m/s) at T-point
[3625]	68	INTEGER , PARAMETER :: jp_humi = 3 ! index of specific humidity ( % )
[888]	69	INTEGER , PARAMETER :: jp_qsr = 4 ! index of solar heat (W/m2)
	70	INTEGER , PARAMETER :: jp_qlw = 5 ! index of Long wave (W/m2)
	71	INTEGER , PARAMETER :: jp_tair = 6 ! index of 10m air temperature (Kelvin)
	72	INTEGER , PARAMETER :: jp_prec = 7 ! index of total precipitation (rain+snow) (Kg/m2/s)
	73	INTEGER , PARAMETER :: jp_snow = 8 ! index of snow (solid prcipitation) (kg/m2/s)
[1705]	74	INTEGER , PARAMETER :: jp_tdif = 9 ! index of tau diff associated to HF tau (N/m2) at T-point
[4990]	75
[888]	76	TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf ! structure of input fields (file informations, fields read)
[4990]	77
[1601]	78	! !!! CORE bulk parameters
[888]	79	REAL(wp), PARAMETER :: rhoa = 1.22 ! air density
	80	REAL(wp), PARAMETER :: cpa = 1000.5 ! specific heat of air
	81	REAL(wp), PARAMETER :: Lv = 2.5e6 ! latent heat of vaporization
	82	REAL(wp), PARAMETER :: Ls = 2.839e6 ! latent heat of sublimation
	83	REAL(wp), PARAMETER :: Stef = 5.67e-8 ! Stefan Boltzmann constant
[4161]	84	REAL(wp), PARAMETER :: Cice = 1.4e-3 ! iovi 1.63e-3 ! transfer coefficient over ice
[3625]	85	REAL(wp), PARAMETER :: albo = 0.066 ! ocean albedo assumed to be constant
[888]	86
[2528]	87	! !!* Namelist namsbc_core : CORE bulk parameters
[4147]	88	LOGICAL :: ln_taudif ! logical flag to use the "mean of stress module - module of mean stress" data
	89	REAL(wp) :: rn_pfac ! multiplication factor for precipitation
[4161]	90	REAL(wp) :: rn_efac ! multiplication factor for evaporation (clem)
	91	REAL(wp) :: rn_vfac ! multiplication factor for ice/ocean velocity in the calculation of wind stress (clem)
[11442]	92	REAL(wp), ALLOCATABLE, SAVE :: rn_vfac0(:,:) ! multiplication factor for ice/ocean velocity in the calculation of wind stress (clem)
[4245]	93	REAL(wp) :: rn_zqt ! z(q,t) : height of humidity and temperature measurements
	94	REAL(wp) :: rn_zu ! z(u) : height of wind measurements
[9288]	95	REAL(wp), PUBLIC :: rn_sfac ! multiplication factor for snow precipitation over sea-ice
[888]	96
	97	!! * Substitutions
	98	# include "domzgr_substitute.h90"
	99	# include "vectopt_loop_substitute.h90"
	100	!!----------------------------------------------------------------------
[4990]	101	!! NEMO/OPA 3.7 , NEMO-consortium (2014)
[1156]	102	!! $Id$
[2528]	103	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
[888]	104	!!----------------------------------------------------------------------
	105	CONTAINS
	106
	107	SUBROUTINE sbc_blk_core( kt )
	108	!!---------------------------------------------------------------------
	109	!! * ROUTINE sbc_blk_core *
[4990]	110	!!
[888]	111	!! ** Purpose : provide at each time step the surface ocean fluxes
[4990]	112	!! (momentum, heat, freshwater and runoff)
[888]	113	!!
[1695]	114	!! ** Method : (1) READ each fluxes in NetCDF files:
	115	!! the 10m wind velocity (i-component) (m/s) at T-point
	116	!! the 10m wind velocity (j-component) (m/s) at T-point
[3625]	117	!! the 10m or 2m specific humidity ( % )
[1695]	118	!! the solar heat (W/m2)
	119	!! the Long wave (W/m2)
[3625]	120	!! the 10m or 2m air temperature (Kelvin)
[1695]	121	!! the total precipitation (rain+snow) (Kg/m2/s)
	122	!! the snow (solid prcipitation) (kg/m2/s)
[3625]	123	!! the tau diff associated to HF tau (N/m2) at T-point (ln_taudif=T)
[1695]	124	!! (2) CALL blk_oce_core
[888]	125	!!
	126	!! C A U T I O N : never mask the surface stress fields
[3625]	127	!! the stress is assumed to be in the (i,j) mesh referential
[888]	128	!!
	129	!! ** Action : defined at each time-step at the air-sea interface
[1695]	130	!! - utau, vtau i- and j-component of the wind stress
[4990]	131	!! - taum wind stress module at T-point
	132	!! - wndm wind speed module at T-point over free ocean or leads in presence of sea-ice
[3625]	133	!! - qns, qsr non-solar and solar heat fluxes
	134	!! - emp upward mass flux (evapo. - precip.)
	135	!! - sfx salt flux due to freezing/melting (non-zero only if ice is present)
	136	!! (set in limsbc(_2).F90)
[4990]	137	!!
	138	!! ** References : Large & Yeager, 2004 / Large & Yeager, 2008
	139	!! Brodeau et al. Ocean Modelling 2010
[888]	140	!!----------------------------------------------------------------------
[2715]	141	INTEGER, INTENT(in) :: kt ! ocean time step
[4990]	142	!
[888]	143	INTEGER :: ierror ! return error code
[1200]	144	INTEGER :: ifpr ! dummy loop indice
[1705]	145	INTEGER :: jfld ! dummy loop arguments
[4147]	146	INTEGER :: ios ! Local integer output status for namelist read
[4990]	147	!
[888]	148	CHARACTER(len=100) :: cn_dir ! Root directory for location of core files
	149	TYPE(FLD_N), DIMENSION(jpfld) :: slf_i ! array of namelist informations on the fields to read
[4161]	150	TYPE(FLD_N) :: sn_wndi, sn_wndj, sn_humi, sn_qsr ! informations about the fields to be read
	151	TYPE(FLD_N) :: sn_qlw , sn_tair, sn_prec, sn_snow ! " "
	152	TYPE(FLD_N) :: sn_tdif ! " "
[4990]	153	NAMELIST/namsbc_core/ cn_dir , ln_taudif, rn_pfac, rn_efac, rn_vfac, &
[1705]	154	& sn_wndi, sn_wndj, sn_humi , sn_qsr , &
[4245]	155	& sn_qlw , sn_tair, sn_prec , sn_snow, &
[9288]	156	& sn_tdif, rn_zqt, rn_zu, rn_sfac
[888]	157	!!---------------------------------------------------------------------
[4990]	158	!
[888]	159	! ! ====================== !
	160	IF( kt == nit000 ) THEN ! First call kt=nit000 !
	161	! ! ====================== !
[1601]	162	!
[13191]	163	rn_sfac = 1._wp ! Default to one if missing from namelist
[4147]	164	REWIND( numnam_ref ) ! Namelist namsbc_core in reference namelist : CORE bulk parameters
	165	READ ( numnam_ref, namsbc_core, IOSTAT = ios, ERR = 901)
	166	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_core in reference namelist', lwp )
[4990]	167	!
[4147]	168	REWIND( numnam_cfg ) ! Namelist namsbc_core in configuration namelist : CORE bulk parameters
	169	READ ( numnam_cfg, namsbc_core, IOSTAT = ios, ERR = 902 )
	170	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_core in configuration namelist', lwp )
	171
[4990]	172	IF(lwm) WRITE( numond, namsbc_core )
[2528]	173	! ! check: do we plan to use ln_dm2dc with non-daily forcing?
[4990]	174	IF( ln_dm2dc .AND. sn_qsr%nfreqh /= 24 ) &
	175	& CALL ctl_stop( 'sbc_blk_core: ln_dm2dc can be activated only with daily short-wave forcing' )
[2528]	176	IF( ln_dm2dc .AND. sn_qsr%ln_tint ) THEN
	177	CALL ctl_warn( 'sbc_blk_core: ln_dm2dc is taking care of the temporal interpolation of daily qsr', &
[4990]	178	& ' ==> We force time interpolation = .false. for qsr' )
[2528]	179	sn_qsr%ln_tint = .false.
	180	ENDIF
	181	! ! store namelist information in an array
[888]	182	slf_i(jp_wndi) = sn_wndi ; slf_i(jp_wndj) = sn_wndj
	183	slf_i(jp_qsr ) = sn_qsr ; slf_i(jp_qlw ) = sn_qlw
	184	slf_i(jp_tair) = sn_tair ; slf_i(jp_humi) = sn_humi
	185	slf_i(jp_prec) = sn_prec ; slf_i(jp_snow) = sn_snow
[1705]	186	slf_i(jp_tdif) = sn_tdif
[4990]	187	!
[2528]	188	lhftau = ln_taudif ! do we use HF tau information?
[1705]	189	jfld = jpfld - COUNT( (/.NOT. lhftau/) )
	190	!
[2528]	191	ALLOCATE( sf(jfld), STAT=ierror ) ! set sf structure
[2715]	192	IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_blk_core: unable to allocate sf structure' )
[1705]	193	DO ifpr= 1, jfld
[2528]	194	ALLOCATE( sf(ifpr)%fnow(jpi,jpj,1) )
[2715]	195	IF( slf_i(ifpr)%ln_tint ) ALLOCATE( sf(ifpr)%fdta(jpi,jpj,1,2) )
[1200]	196	END DO
[2528]	197	! ! fill sf with slf_i and control print
	198	CALL fld_fill( sf, slf_i, cn_dir, 'sbc_blk_core', 'flux formulation for ocean surface boundary condition', 'namsbc_core' )
[1601]	199	!
[3625]	200	sfx(:,:) = 0._wp ! salt flux; zero unless ice is present (computed in limsbc(_2).F90)
	201	!
[11442]	202	ALLOCATE ( rn_vfac0(jpi,jpj) )
	203	rn_vfac0(:,:) = rn_vfac
	204	!
[888]	205	ENDIF
	206
[13191]	207	#if defined key_traldf_c2d \|\| key_traldf_c3d
[11442]	208	IF( ln_stopack .AND. nn_spp_relw > 0 ) THEN
	209	rn_vfac0(:,:) = rn_vfac
	210	CALL spp_gen(kt, rn_vfac0, nn_spp_relw, rn_relw_sd, jk_spp_relw )
	211	ENDIF
[13191]	212	#else
	213	IF ( ln_stopack .AND. nn_spp_relw > 0 ) &
	214	& CALL ctl_stop( 'sbc_blk_core: parameter perturbation will only work with '// &
	215	'key_traldf_c2d or key_traldf_c3d')
	216	#endif
[11442]	217
[3625]	218	CALL fld_read( kt, nn_fsbc, sf ) ! input fields provided at the current time-step
[888]	219
[3625]	220	! ! compute the surface ocean fluxes using CORE bulk formulea
[3680]	221	IF( MOD( kt - 1, nn_fsbc ) == 0 ) CALL blk_oce_core( kt, sf, sst_m, ssu_m, ssv_m )
[3294]	222
	223	#if defined key_cice
	224	IF( MOD( kt - 1, nn_fsbc ) == 0 ) THEN
[13191]	225	qlw_ice(:,:,1) = sf(jp_qlw)%fnow(:,:,1)
[6823]	226	IF( ln_dm2dc ) THEN ; qsr_ice(:,:,1) = sbc_dcy( sf(jp_qsr)%fnow(:,:,1) )
	227	ELSE ; qsr_ice(:,:,1) = sf(jp_qsr)%fnow(:,:,1)
	228	ENDIF
[13191]	229	tatm_ice(:,:) = sf(jp_tair)%fnow(:,:,1)
[3294]	230	qatm_ice(:,:) = sf(jp_humi)%fnow(:,:,1)
	231	tprecip(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac
	232	sprecip(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac
	233	wndi_ice(:,:) = sf(jp_wndi)%fnow(:,:,1)
	234	wndj_ice(:,:) = sf(jp_wndj)%fnow(:,:,1)
	235	ENDIF
	236	#endif
[2528]	237	!
[888]	238	END SUBROUTINE sbc_blk_core
[13191]	239
	240
[3680]	241	SUBROUTINE blk_oce_core( kt, sf, pst, pu, pv )
[888]	242	!!---------------------------------------------------------------------
	243	!! * ROUTINE blk_core *
	244	!!
	245	!! ** Purpose : provide the momentum, heat and freshwater fluxes at
	246	!! the ocean surface at each time step
	247	!!
	248	!! ** Method : CORE bulk formulea for the ocean using atmospheric
	249	!! fields read in sbc_read
[13191]	250	!!
[888]	251	!! ** Outputs : - utau : i-component of the stress at U-point (N/m2)
	252	!! - vtau : j-component of the stress at V-point (N/m2)
[1695]	253	!! - taum : Wind stress module at T-point (N/m2)
	254	!! - wndm : Wind speed module at T-point (m/s)
[888]	255	!! - qsr : Solar heat flux over the ocean (W/m2)
	256	!! - qns : Non Solar heat flux over the ocean (W/m2)
[3625]	257	!! - emp : evaporation minus precipitation (kg/m2/s)
[1242]	258	!!
	259	!! ** Nota : sf has to be a dummy argument for AGRIF on NEC
[888]	260	!!---------------------------------------------------------------------
[3680]	261	INTEGER , INTENT(in ) :: kt ! time step index
	262	TYPE(fld), INTENT(inout), DIMENSION(:) :: sf ! input data
	263	REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pst ! surface temperature [Celcius]
	264	REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pu ! surface current at U-point (i-component) [m/s]
	265	REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pv ! surface current at V-point (j-component) [m/s]
[2715]	266	!
	267	INTEGER :: ji, jj ! dummy loop indices
	268	REAL(wp) :: zcoef_qsatw, zztmp ! local variable
[3294]	269	REAL(wp), DIMENSION(:,:), POINTER :: zwnd_i, zwnd_j ! wind speed components at T-point
	270	REAL(wp), DIMENSION(:,:), POINTER :: zqsatw ! specific humidity at pst
	271	REAL(wp), DIMENSION(:,:), POINTER :: zqlw, zqsb ! long wave and sensible heat fluxes
	272	REAL(wp), DIMENSION(:,:), POINTER :: zqla, zevap ! latent heat fluxes and evaporation
	273	REAL(wp), DIMENSION(:,:), POINTER :: Cd ! transfer coefficient for momentum (tau)
	274	REAL(wp), DIMENSION(:,:), POINTER :: Ch ! transfer coefficient for sensible heat (Q_sens)
	275	REAL(wp), DIMENSION(:,:), POINTER :: Ce ! tansfert coefficient for evaporation (Q_lat)
	276	REAL(wp), DIMENSION(:,:), POINTER :: zst ! surface temperature in Kelvin
	277	REAL(wp), DIMENSION(:,:), POINTER :: zt_zu ! air temperature at wind speed height
	278	REAL(wp), DIMENSION(:,:), POINTER :: zq_zu ! air spec. hum. at wind speed height
[888]	279	!!---------------------------------------------------------------------
[2715]	280	!
[3294]	281	IF( nn_timing == 1 ) CALL timing_start('blk_oce_core')
	282	!
	283	CALL wrk_alloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap )
	284	CALL wrk_alloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu )
	285	!
[888]	286	! local scalars ( place there for vector optimisation purposes)
	287	zcoef_qsatw = 0.98 * 640380. / rhoa
[13191]	288
[3625]	289	zst(:,:) = pst(:,:) + rt0 ! convert SST from Celcius to Kelvin (and set minimum value far above 0 K)
[888]	290
	291	! ----------------------------------------------------------------------------- !
	292	! 0 Wind components and module at T-point relative to the moving ocean !
	293	! ----------------------------------------------------------------------------- !
[1000]	294
[888]	295	! ... components ( U10m - U_oce ) at T-point (unmasked)
[13191]	296	zwnd_i(:,:) = 0.e0
[888]	297	zwnd_j(:,:) = 0.e0
[3680]	298	#if defined key_cyclone
[4990]	299	CALL wnd_cyc( kt, zwnd_i, zwnd_j ) ! add analytical tropical cyclone (Vincent et al. JGR 2012)
[3680]	300	DO jj = 2, jpjm1
	301	DO ji = fs_2, fs_jpim1 ! vect. opt.
	302	sf(jp_wndi)%fnow(ji,jj,1) = sf(jp_wndi)%fnow(ji,jj,1) + zwnd_i(ji,jj)
	303	sf(jp_wndj)%fnow(ji,jj,1) = sf(jp_wndj)%fnow(ji,jj,1) + zwnd_j(ji,jj)
	304	END DO
	305	END DO
	306	#endif
[888]	307	DO jj = 2, jpjm1
	308	DO ji = fs_2, fs_jpim1 ! vect. opt.
[11442]	309	zwnd_i(ji,jj) = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac0(ji,jj) * 0.5 * ( pu(ji-1,jj ) + pu(ji,jj) ) )
	310	zwnd_j(ji,jj) = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac0(ji,jj) * 0.5 * ( pv(ji ,jj-1) + pv(ji,jj) ) )
[888]	311	END DO
	312	END DO
	313	CALL lbc_lnk( zwnd_i(:,:) , 'T', -1. )
	314	CALL lbc_lnk( zwnd_j(:,:) , 'T', -1. )
	315	! ... scalar wind ( = \| U10m - U_oce \| ) at T-point (masked)
[1025]	316	wndm(:,:) = SQRT( zwnd_i(:,:) * zwnd_i(:,:) &
	317	& + zwnd_j(:,:) * zwnd_j(:,:) ) * tmask(:,:,1)
[888]	318
	319	! ----------------------------------------------------------------------------- !
	320	! I Radiative FLUXES !
	321	! ----------------------------------------------------------------------------- !
[4990]	322
[2528]	323	! ocean albedo assumed to be constant + modify now Qsr to include the diurnal cycle ! Short Wave
	324	zztmp = 1. - albo
	325	IF( ln_dm2dc ) THEN ; qsr(:,:) = zztmp * sbc_dcy( sf(jp_qsr)%fnow(:,:,1) ) * tmask(:,:,1)
	326	ELSE ; qsr(:,:) = zztmp * sf(jp_qsr)%fnow(:,:,1) * tmask(:,:,1)
	327	ENDIF
[5385]	328
[2528]	329	zqlw(:,:) = ( sf(jp_qlw)%fnow(:,:,1) - Stef * zst(:,:)zst(:,:)zst(:,:)zst(:,:) ) tmask(:,:,1) ! Long Wave
[888]	330	! ----------------------------------------------------------------------------- !
	331	! II Turbulent FLUXES !
	332	! ----------------------------------------------------------------------------- !
	333
	334	! ... specific humidity at SST and IST
[4990]	335	zqsatw(:,:) = zcoef_qsatw * EXP( -5107.4 / zst(:,:) )
[888]	336
	337	! ... NCAR Bulk formulae, computation of Cd, Ch, Ce at T-point :
[4990]	338	CALL turb_core_2z( rn_zqt, rn_zu, zst, sf(jp_tair)%fnow, zqsatw, sf(jp_humi)%fnow, wndm, &
	339	& Cd, Ch, Ce, zt_zu, zq_zu )
[13191]	340
[1695]	341	! ... tau module, i and j component
	342	DO jj = 1, jpj
	343	DO ji = 1, jpi
	344	zztmp = rhoa * wndm(ji,jj) * Cd(ji,jj)
	345	taum (ji,jj) = zztmp * wndm (ji,jj)
	346	zwnd_i(ji,jj) = zztmp * zwnd_i(ji,jj)
	347	zwnd_j(ji,jj) = zztmp * zwnd_j(ji,jj)
	348	END DO
	349	END DO
[1705]	350
	351	! ... add the HF tau contribution to the wind stress module?
[4990]	352	IF( lhftau ) THEN
[2528]	353	taum(:,:) = taum(:,:) + sf(jp_tdif)%fnow(:,:,1)
[1705]	354	ENDIF
	355	CALL iom_put( "taum_oce", taum ) ! output wind stress module
	356
[888]	357	! ... utau, vtau at U- and V_points, resp.
	358	! Note the use of 0.5*(2-umask) in order to unmask the stress along coastlines
[4990]	359	! Note the use of MAX(tmask(i,j),tmask(i+1,j) is to mask tau over ice shelves
[888]	360	DO jj = 1, jpjm1
	361	DO ji = 1, fs_jpim1
[4990]	362	utau(ji,jj) = 0.5 * ( 2. - umask(ji,jj,1) ) * ( zwnd_i(ji,jj) + zwnd_i(ji+1,jj ) ) &
	363	& * MAX(tmask(ji,jj,1),tmask(ji+1,jj,1))
	364	vtau(ji,jj) = 0.5 * ( 2. - vmask(ji,jj,1) ) * ( zwnd_j(ji,jj) + zwnd_j(ji ,jj+1) ) &
	365	& * MAX(tmask(ji,jj,1),tmask(ji,jj+1,1))
[888]	366	END DO
	367	END DO
	368	CALL lbc_lnk( utau(:,:), 'U', -1. )
	369	CALL lbc_lnk( vtau(:,:), 'V', -1. )
	370
[13191]	371
[888]	372	! Turbulent fluxes over ocean
	373	! -----------------------------
[4990]	374	IF( ABS( rn_zu - rn_zqt) < 0.01_wp ) THEN
	375	!! q_air and t_air are (or "are almost") given at 10m (wind reference height)
	376	zevap(:,:) = rn_efacMAX( 0._wp, rhoaCe(:,:)( zqsatw(:,:) - sf(jp_humi)%fnow(:,:,1) )wndm(:,:) ) ! Evaporation
	377	zqsb (:,:) = cparhoaCh(:,:)( zst (:,:) - sf(jp_tair)%fnow(:,:,1) )wndm(:,:) ! Sensible Heat
[888]	378	ELSE
[4990]	379	!! q_air and t_air are not given at 10m (wind reference height)
	380	! Values of temp. and hum. adjusted to height of wind during bulk algorithm iteration must be used!!!
	381	zevap(:,:) = rn_efacMAX( 0._wp, rhoaCe(:,:)( zqsatw(:,:) - zq_zu(:,:) )wndm(:,:) ) ! Evaporation
	382	zqsb (:,:) = cparhoaCh(:,:)( zst (:,:) - zt_zu(:,:) )wndm(:,:) ! Sensible Heat
[888]	383	ENDIF
	384	zqla (:,:) = Lv * zevap(:,:) ! Latent Heat
	385
	386	IF(ln_ctl) THEN
[1025]	387	CALL prt_ctl( tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=Ce , clinfo2=' Ce : ' )
	388	CALL prt_ctl( tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=Ch , clinfo2=' Ch : ' )
	389	CALL prt_ctl( tab2d_1=zqlw , clinfo1=' blk_oce_core: zqlw : ', tab2d_2=qsr, clinfo2=' qsr : ' )
	390	CALL prt_ctl( tab2d_1=zqsatw, clinfo1=' blk_oce_core: zqsatw : ', tab2d_2=zst, clinfo2=' zst : ' )
	391	CALL prt_ctl( tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, &
	392	& tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask )
	393	CALL prt_ctl( tab2d_1=wndm , clinfo1=' blk_oce_core: wndm : ')
	394	CALL prt_ctl( tab2d_1=zst , clinfo1=' blk_oce_core: zst : ')
[888]	395	ENDIF
[13191]	396
[888]	397	! ----------------------------------------------------------------------------- !
	398	! III Total FLUXES !
	399	! ----------------------------------------------------------------------------- !
[4990]	400	!
[3625]	401	emp (:,:) = ( zevap(:,:) & ! mass flux (evap. - precip.)
	402	& - sf(jp_prec)%fnow(:,:,1) * rn_pfac ) * tmask(:,:,1)
[5407]	403	!
[13191]	404	qns(:,:) = zqlw(:,:) - zqsb(:,:) - zqla(:,:) & ! Downward Non Solar
[3772]	405	& - sf(jp_snow)%fnow(:,:,1) * rn_pfac * lfus & ! remove latent melting heat for solid precip
	406	& - zevap(:,:) * pst(:,:) * rcp & ! remove evap heat content at SST
	407	& + ( sf(jp_prec)%fnow(:,:,1) - sf(jp_snow)%fnow(:,:,1) ) * rn_pfac & ! add liquid precip heat content at Tair
[4990]	408	& * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp &
[3772]	409	& + sf(jp_snow)%fnow(:,:,1) * rn_pfac & ! add solid precip heat content at min(Tair,Tsnow)
[4990]	410	& * ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1)
[888]	411	!
[5407]	412	#if defined key_lim3
	413	qns_oce(:,:) = zqlw(:,:) - zqsb(:,:) - zqla(:,:) ! non solar without emp (only needed by LIM3)
	414	qsr_oce(:,:) = qsr(:,:)
	415	#endif
[1482]	416	!
[5407]	417	IF ( nn_ice == 0 ) THEN
	418	CALL iom_put( "qlw_oce" , zqlw ) ! output downward longwave heat over the ocean
	419	CALL iom_put( "qsb_oce" , - zqsb ) ! output downward sensible heat over the ocean
	420	CALL iom_put( "qla_oce" , - zqla ) ! output downward latent heat over the ocean
	421	CALL iom_put( "qemp_oce", qns-zqlw+zqsb+zqla ) ! output downward heat content of E-P over the ocean
	422	CALL iom_put( "qns_oce" , qns ) ! output downward non solar heat over the ocean
	423	CALL iom_put( "qsr_oce" , qsr ) ! output downward solar heat over the ocean
	424	CALL iom_put( "qt_oce" , qns+qsr ) ! output total downward heat over the ocean
[6487]	425	tprecip(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac ! output total precipitation [kg/m2/s]
	426	sprecip(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac ! output solid precipitation [kg/m2/s]
	427	CALL iom_put( 'snowpre', sprecip * 86400. ) ! Snow
	428	CALL iom_put( 'precip' , tprecip * 86400. ) ! Total precipitation
[5407]	429	ENDIF
	430	!
[1482]	431	IF(ln_ctl) THEN
	432	CALL prt_ctl(tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=zqlw , clinfo2=' zqlw : ')
	433	CALL prt_ctl(tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=qsr , clinfo2=' qsr : ')
	434	CALL prt_ctl(tab2d_1=pst , clinfo1=' blk_oce_core: pst : ', tab2d_2=emp , clinfo2=' emp : ')
	435	CALL prt_ctl(tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, &
	436	& tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask )
	437	ENDIF
	438	!
[3294]	439	CALL wrk_dealloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap )
	440	CALL wrk_dealloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu )
[2715]	441	!
[3294]	442	IF( nn_timing == 1 ) CALL timing_stop('blk_oce_core')
	443	!
[888]	444	END SUBROUTINE blk_oce_core
[13191]	445
	446
[5407]	447	#if defined key_lim2 \|\| defined key_lim3
	448	SUBROUTINE blk_ice_core_tau
[888]	449	!!---------------------------------------------------------------------
[5407]	450	!! * ROUTINE blk_ice_core_tau *
[888]	451	!!
	452	!! ** Purpose : provide the surface boundary condition over sea-ice
	453	!!
[5407]	454	!! ** Method : compute momentum using CORE bulk
	455	!! formulea, ice variables and read atmospheric fields.
[888]	456	!! NB: ice drag coefficient is assumed to be a constant
	457	!!---------------------------------------------------------------------
[5407]	458	INTEGER :: ji, jj ! dummy loop indices
	459	REAL(wp) :: zcoef_wnorm, zcoef_wnorm2
	460	REAL(wp) :: zwnorm_f, zwndi_f , zwndj_f ! relative wind module and components at F-point
	461	REAL(wp) :: zwndi_t , zwndj_t ! relative wind components at T-point
[888]	462	!!---------------------------------------------------------------------
[3294]	463	!
[5407]	464	IF( nn_timing == 1 ) CALL timing_start('blk_ice_core_tau')
[3294]	465	!
[888]	466	! local scalars ( place there for vector optimisation purposes)
[2528]	467	zcoef_wnorm = rhoa * Cice
[888]	468	zcoef_wnorm2 = rhoa * Cice * 0.5
	469
	470	!!gm brutal....
[5407]	471	utau_ice (:,:) = 0._wp
	472	vtau_ice (:,:) = 0._wp
	473	wndm_ice (:,:) = 0._wp
[888]	474	!!gm end
	475
	476	! ----------------------------------------------------------------------------- !
	477	! Wind components and module relative to the moving ocean ( U10m - U_ice ) !
	478	! ----------------------------------------------------------------------------- !
[5407]	479	SELECT CASE( cp_ice_msh )
[2528]	480	CASE( 'I' ) ! B-grid ice dynamics : I-point (i.e. F-point with sea-ice indexation)
[888]	481	! and scalar wind at T-point ( = \| U10m - U_ice \| ) (masked)
	482	DO jj = 2, jpjm1
[2528]	483	DO ji = 2, jpim1 ! B grid : NO vector opt
[888]	484	! ... scalar wind at I-point (fld being at T-point)
[11442]	485	zwndi_f = 0.25 * ( sf(jp_wndi)%fnow(ji-1,jj ,1) + sf(jp_wndi)%fnow(ji ,jj ,1) &
	486	& + sf(jp_wndi)%fnow(ji-1,jj-1,1) + sf(jp_wndi)%fnow(ji ,jj-1,1) ) &
	487	& - rn_vfac0(ji,jj) * u_ice(ji,jj)
	488	zwndj_f = 0.25 * ( sf(jp_wndj)%fnow(ji-1,jj ,1) + sf(jp_wndj)%fnow(ji ,jj ,1) &
	489	& + sf(jp_wndj)%fnow(ji-1,jj-1,1) + sf(jp_wndj)%fnow(ji ,jj-1,1) ) &
	490	& - rn_vfac0(ji,jj) * v_ice(ji,jj)
[888]	491	zwnorm_f = zcoef_wnorm * SQRT( zwndi_f * zwndi_f + zwndj_f * zwndj_f )
	492	! ... ice stress at I-point
[5407]	493	utau_ice(ji,jj) = zwnorm_f * zwndi_f
	494	vtau_ice(ji,jj) = zwnorm_f * zwndj_f
[888]	495	! ... scalar wind at T-point (fld being at T-point)
[11442]	496	zwndi_t = sf(jp_wndi)%fnow(ji,jj,1) &
	497	& - rn_vfac0(ji,jj) * 0.25 * ( u_ice(ji,jj+1) + u_ice(ji+1,jj+1) &
	498	& + u_ice(ji,jj ) + u_ice(ji+1,jj ) )
	499	zwndj_t = sf(jp_wndj)%fnow(ji,jj,1) &
	500	& - rn_vfac0(ji,jj) * 0.25 * ( v_ice(ji,jj+1) + v_ice(ji+1,jj+1) &
	501	& + v_ice(ji,jj ) + v_ice(ji+1,jj ) )
[5407]	502	wndm_ice(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1)
[888]	503	END DO
	504	END DO
[5407]	505	CALL lbc_lnk( utau_ice, 'I', -1. )
	506	CALL lbc_lnk( vtau_ice, 'I', -1. )
	507	CALL lbc_lnk( wndm_ice, 'T', 1. )
[888]	508	!
	509	CASE( 'C' ) ! C-grid ice dynamics : U & V-points (same as ocean)
	510	DO jj = 2, jpj
	511	DO ji = fs_2, jpi ! vect. opt.
[11442]	512	zwndi_t = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac0(ji,jj) * 0.5 * ( u_ice(ji-1,jj ) + u_ice(ji,jj) ) )
	513	zwndj_t = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac0(ji,jj) * 0.5 * ( v_ice(ji ,jj-1) + v_ice(ji,jj) ) )
[5407]	514	wndm_ice(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1)
[888]	515	END DO
	516	END DO
	517	DO jj = 2, jpjm1
	518	DO ji = fs_2, fs_jpim1 ! vect. opt.
[11442]	519	utau_ice(ji,jj) = zcoef_wnorm2 * ( wndm_ice(ji+1,jj ) + wndm_ice(ji,jj) ) &
	520	& * ( 0.5 * (sf(jp_wndi)%fnow(ji+1,jj,1) + sf(jp_wndi)%fnow(ji,jj,1) ) &
	521	& - rn_vfac0(ji,jj) * u_ice(ji,jj) )
	522	vtau_ice(ji,jj) = zcoef_wnorm2 * ( wndm_ice(ji,jj+1 ) + wndm_ice(ji,jj) ) &
	523	& * ( 0.5 * (sf(jp_wndj)%fnow(ji,jj+1,1) + sf(jp_wndj)%fnow(ji,jj,1) ) &
	524	& - rn_vfac0(ji,jj) * v_ice(ji,jj) )
[888]	525	END DO
	526	END DO
[5407]	527	CALL lbc_lnk( utau_ice, 'U', -1. )
	528	CALL lbc_lnk( vtau_ice, 'V', -1. )
	529	CALL lbc_lnk( wndm_ice, 'T', 1. )
[888]	530	!
	531	END SELECT
	532
[5407]	533	IF(ln_ctl) THEN
	534	CALL prt_ctl(tab2d_1=utau_ice , clinfo1=' blk_ice_core: utau_ice : ', tab2d_2=vtau_ice , clinfo2=' vtau_ice : ')
	535	CALL prt_ctl(tab2d_1=wndm_ice , clinfo1=' blk_ice_core: wndm_ice : ')
	536	ENDIF
	537
	538	IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core_tau')
[13191]	539
[5407]	540	END SUBROUTINE blk_ice_core_tau
	541
	542
	543	SUBROUTINE blk_ice_core_flx( ptsu, palb )
	544	!!---------------------------------------------------------------------
	545	!! * ROUTINE blk_ice_core_flx *
	546	!!
	547	!! ** Purpose : provide the surface boundary condition over sea-ice
	548	!!
	549	!! ** Method : compute heat and freshwater exchanged
	550	!! between atmosphere and sea-ice using CORE bulk
	551	!! formulea, ice variables and read atmmospheric fields.
[13191]	552	!!
[5407]	553	!! caution : the net upward water flux has with mm/day unit
	554	!!---------------------------------------------------------------------
	555	REAL(wp), DIMENSION(:,:,:), INTENT(in) :: ptsu ! sea ice surface temperature
	556	REAL(wp), DIMENSION(:,:,:), INTENT(in) :: palb ! ice albedo (all skies)
	557	!!
	558	INTEGER :: ji, jj, jl ! dummy loop indices
	559	REAL(wp) :: zst2, zst3
	560	REAL(wp) :: zcoef_dqlw, zcoef_dqla, zcoef_dqsb
	561	REAL(wp) :: zztmp, z1_lsub ! temporary variable
	562	!!
	563	REAL(wp), DIMENSION(:,:,:), POINTER :: z_qlw ! long wave heat flux over ice
	564	REAL(wp), DIMENSION(:,:,:), POINTER :: z_qsb ! sensible heat flux over ice
	565	REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqlw ! long wave heat sensitivity over ice
	566	REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqsb ! sensible heat sensitivity over ice
	567	REAL(wp), DIMENSION(:,:) , POINTER :: zevap, zsnw ! evaporation and snw distribution after wind blowing (LIM3)
	568	!!---------------------------------------------------------------------
	569	!
	570	IF( nn_timing == 1 ) CALL timing_start('blk_ice_core_flx')
	571	!
[13191]	572	CALL wrk_alloc( jpi,jpj,jpl, z_qlw, z_qsb, z_dqlw, z_dqsb )
[5407]	573
	574	! local scalars ( place there for vector optimisation purposes)
	575	zcoef_dqlw = 4.0 * 0.95 * Stef
	576	zcoef_dqla = -Ls * Cice * 11637800. * (-5897.8)
	577	zcoef_dqsb = rhoa * cpa * Cice
	578
[2528]	579	zztmp = 1. / ( 1. - albo )
[888]	580	! ! ========================== !
[5407]	581	DO jl = 1, jpl ! Loop over ice categories !
[888]	582	! ! ========================== !
	583	DO jj = 1 , jpj
	584	DO ji = 1, jpi
	585	! ----------------------------!
	586	! I Radiative FLUXES !
	587	! ----------------------------!
[5407]	588	zst2 = ptsu(ji,jj,jl) * ptsu(ji,jj,jl)
	589	zst3 = ptsu(ji,jj,jl) * zst2
[888]	590	! Short Wave (sw)
[5407]	591	qsr_ice(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr(ji,jj)
[888]	592	! Long Wave (lw)
[5407]	593	z_qlw(ji,jj,jl) = 0.95 * ( sf(jp_qlw)%fnow(ji,jj,1) - Stef * ptsu(ji,jj,jl) * zst3 ) * tmask(ji,jj,1)
[888]	594	! lw sensitivity
[13191]	595	z_dqlw(ji,jj,jl) = zcoef_dqlw * zst3
[888]	596
	597	! ----------------------------!
	598	! II Turbulent FLUXES !
	599	! ----------------------------!
	600
	601	! ... turbulent heat fluxes
	602	! Sensible Heat
[5407]	603	z_qsb(ji,jj,jl) = rhoa * cpa * Cice * wndm_ice(ji,jj) * ( ptsu(ji,jj,jl) - sf(jp_tair)%fnow(ji,jj,1) )
[888]	604	! Latent Heat
[13191]	605	qla_ice(ji,jj,jl) = rn_efac * MAX( 0.e0, rhoa * Ls * Cice * wndm_ice(ji,jj) &
[5407]	606	& * ( 11637800. * EXP( -5897.8 / ptsu(ji,jj,jl) ) / rhoa - sf(jp_humi)%fnow(ji,jj,1) ) )
	607	! Latent heat sensitivity for ice (Dqla/Dt)
	608	IF( qla_ice(ji,jj,jl) > 0._wp ) THEN
	609	dqla_ice(ji,jj,jl) = rn_efac * zcoef_dqla * wndm_ice(ji,jj) / ( zst2 ) * EXP( -5897.8 / ptsu(ji,jj,jl) )
[4689]	610	ELSE
[5407]	611	dqla_ice(ji,jj,jl) = 0._wp
[4689]	612	ENDIF
[4990]	613
[888]	614	! Sensible heat sensitivity (Dqsb_ice/Dtn_ice)
[5407]	615	z_dqsb(ji,jj,jl) = zcoef_dqsb * wndm_ice(ji,jj)
[888]	616
	617	! ----------------------------!
	618	! III Total FLUXES !
	619	! ----------------------------!
	620	! Downward Non Solar flux
[5407]	621	qns_ice (ji,jj,jl) = z_qlw (ji,jj,jl) - z_qsb (ji,jj,jl) - qla_ice (ji,jj,jl)
[888]	622	! Total non solar heat flux sensitivity for ice
[5407]	623	dqns_ice(ji,jj,jl) = - ( z_dqlw(ji,jj,jl) + z_dqsb(ji,jj,jl) + dqla_ice(ji,jj,jl) )
[888]	624	END DO
	625	!
	626	END DO
	627	!
	628	END DO
	629	!
[5407]	630	tprecip(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac ! total precipitation [kg/m2/s]
	631	sprecip(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac ! solid precipitation [kg/m2/s]
	632	CALL iom_put( 'snowpre', sprecip * 86400. ) ! Snow precipitation
	633	CALL iom_put( 'precip' , tprecip * 86400. ) ! Total precipitation
	634
	635	#if defined key_lim3
[13191]	636	CALL wrk_alloc( jpi,jpj, zevap, zsnw )
[5407]	637
	638	! --- evaporation --- !
	639	z1_lsub = 1._wp / Lsub
[6498]	640	evap_ice (:,:,:) = rn_efac * qla_ice (:,:,:) * z1_lsub ! sublimation
	641	devap_ice(:,:,:) = rn_efac * dqla_ice(:,:,:) * z1_lsub ! d(sublimation)/dT
	642	zevap (:,:) = rn_efac * ( emp(:,:) + tprecip(:,:) ) ! evaporation over ocean
[5407]	643
	644	! --- evaporation minus precipitation --- !
[5487]	645	zsnw(:,:) = 0._wp
[13191]	646	CALL lim_thd_snwblow( pfrld, zsnw ) ! snow distribution over ice after wind blowing
[5407]	647	emp_oce(:,:) = pfrld(:,:) * zevap(:,:) - ( tprecip(:,:) - sprecip(:,:) ) - sprecip(:,:) * (1._wp - zsnw )
	648	emp_ice(:,:) = SUM( a_i_b(:,:,:) * evap_ice(:,:,:), dim=3 ) - sprecip(:,:) * zsnw
	649	emp_tot(:,:) = emp_oce(:,:) + emp_ice(:,:)
	650
	651	! --- heat flux associated with emp --- !
	652	qemp_oce(:,:) = - pfrld(:,:) * zevap(:,:) * sst_m(:,:) * rcp & ! evap at sst
	653	& + ( tprecip(:,:) - sprecip(:,:) ) * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp & ! liquid precip at Tair
	654	& + sprecip(:,:) * ( 1._wp - zsnw ) * & ! solid precip at min(Tair,Tsnow)
	655	& ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
	656	qemp_ice(:,:) = sprecip(:,:) * zsnw * & ! solid precip (only)
	657	& ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
	658
	659	! --- total solar and non solar fluxes --- !
	660	qns_tot(:,:) = pfrld(:,:) * qns_oce(:,:) + SUM( a_i_b(:,:,:) * qns_ice(:,:,:), dim=3 ) + qemp_ice(:,:) + qemp_oce(:,:)
	661	qsr_tot(:,:) = pfrld(:,:) * qsr_oce(:,:) + SUM( a_i_b(:,:,:) * qsr_ice(:,:,:), dim=3 )
	662
	663	! --- heat content of precip over ice in J/m3 (to be used in 1D-thermo) --- !
	664	qprec_ice(:,:) = rhosn * ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
	665
[6498]	666	! --- heat content of evap over ice in W/m2 (to be used in 1D-thermo) --- !
	667	DO jl = 1, jpl
	668	qevap_ice(:,:,jl) = 0._wp ! should be -evap_ice(:,:,jl)( ( Tice - rt0 ) cpic * tmask(:,:,1) )
[13191]	669	! But we do not have Tice => consider it at 0 degC => evap=0
[6498]	670	END DO
	671
[13191]	672	CALL wrk_dealloc( jpi,jpj, zevap, zsnw )
[5407]	673	#endif
	674
[888]	675	!--------------------------------------------------------------------
	676	! FRACTIONs of net shortwave radiation which is not absorbed in the
	677	! thin surface layer and penetrates inside the ice cover
	678	! ( Maykut and Untersteiner, 1971 ; Ebert and Curry, 1993 )
[4990]	679	!
[5407]	680	fr1_i0(:,:) = ( 0.18 * ( 1.0 - cldf_ice ) + 0.35 * cldf_ice )
	681	fr2_i0(:,:) = ( 0.82 * ( 1.0 - cldf_ice ) + 0.65 * cldf_ice )
[4990]	682	!
[888]	683	!
	684	IF(ln_ctl) THEN
[5407]	685	CALL prt_ctl(tab3d_1=qla_ice , clinfo1=' blk_ice_core: qla_ice : ', tab3d_2=z_qsb , clinfo2=' z_qsb : ', kdim=jpl)
	686	CALL prt_ctl(tab3d_1=z_qlw , clinfo1=' blk_ice_core: z_qlw : ', tab3d_2=dqla_ice, clinfo2=' dqla_ice : ', kdim=jpl)
	687	CALL prt_ctl(tab3d_1=z_dqsb , clinfo1=' blk_ice_core: z_dqsb : ', tab3d_2=z_dqlw , clinfo2=' z_dqlw : ', kdim=jpl)
	688	CALL prt_ctl(tab3d_1=dqns_ice, clinfo1=' blk_ice_core: dqns_ice : ', tab3d_2=qsr_ice , clinfo2=' qsr_ice : ', kdim=jpl)
	689	CALL prt_ctl(tab3d_1=ptsu , clinfo1=' blk_ice_core: ptsu : ', tab3d_2=qns_ice , clinfo2=' qns_ice : ', kdim=jpl)
	690	CALL prt_ctl(tab2d_1=tprecip , clinfo1=' blk_ice_core: tprecip : ', tab2d_2=sprecip , clinfo2=' sprecip : ')
[888]	691	ENDIF
	692
[5407]	693	CALL wrk_dealloc( jpi,jpj,jpl, z_qlw, z_qsb, z_dqlw, z_dqsb )
[2715]	694	!
[5407]	695	IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core_flx')
[13191]	696
[5407]	697	END SUBROUTINE blk_ice_core_flx
	698	#endif
[888]	699
[4990]	700	SUBROUTINE turb_core_2z( zt, zu, sst, T_zt, q_sat, q_zt, dU, &
	701	& Cd, Ch, Ce , T_zu, q_zu )
[888]	702	!!----------------------------------------------------------------------
	703	!! * ROUTINE turb_core *
	704	!!
[4990]	705	!! ** Purpose : Computes turbulent transfert coefficients of surface
	706	!! fluxes according to Large & Yeager (2004) and Large & Yeager (2008)
	707	!! If relevant (zt /= zu), adjust temperature and humidity from height zt to zu
[888]	708	!!
[13191]	709	!! ** Method : Monin Obukhov Similarity Theory
[4990]	710	!! + Large & Yeager (2004,2008) closure: CD_n10 = f(U_n10)
[888]	711	!!
[4990]	712	!! ** References : Large & Yeager, 2004 / Large & Yeager, 2008
	713	!!
	714	!! ** Last update: Laurent Brodeau, June 2014:
	715	!! - handles both cases zt=zu and zt/=zu
	716	!! - optimized: less 2D arrays allocated and less operations
	717	!! - better first guess of stability by checking air-sea difference of virtual temperature
	718	!! rather than temperature difference only...
[13191]	719	!! - added function "cd_neutral_10m" that uses the improved parametrization of
[4990]	720	!! Large & Yeager 2008. Drag-coefficient reduction for Cyclone conditions!
	721	!! - using code-wide physical constants defined into "phycst.mod" rather than redifining them
	722	!! => 'vkarmn' and 'grav'
[888]	723	!!----------------------------------------------------------------------
[3294]	724	REAL(wp), INTENT(in ) :: zt ! height for T_zt and q_zt [m]
	725	REAL(wp), INTENT(in ) :: zu ! height for dU [m]
	726	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: sst ! sea surface temperature [Kelvin]
	727	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: T_zt ! potential air temperature [Kelvin]
	728	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_sat ! sea surface specific humidity [kg/kg]
	729	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_zt ! specific air humidity [kg/kg]
[4990]	730	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: dU ! relative wind module at zu [m/s]
[3294]	731	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Cd ! transfer coefficient for momentum (tau)
	732	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ch ! transfer coefficient for sensible heat (Q_sens)
	733	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ce ! transfert coefficient for evaporation (Q_lat)
	734	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: T_zu ! air temp. shifted at zu [K]
	735	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: q_zu ! spec. hum. shifted at zu [kg/kg]
[4990]	736	!
	737	INTEGER :: j_itt
	738	INTEGER , PARAMETER :: nb_itt = 5 ! number of itterations
	739	LOGICAL :: l_zt_equal_zu = .FALSE. ! if q and t are given at different height than U
	740	!
	741	REAL(wp), DIMENSION(:,:), POINTER :: U_zu ! relative wind at zu [m/s]
[3294]	742	REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient
	743	REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient
	744	REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10
	745	REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd
	746	REAL(wp), DIMENSION(:,:), POINTER :: zeta_u ! stability parameter at height zu
	747	REAL(wp), DIMENSION(:,:), POINTER :: zeta_t ! stability parameter at height zt
[4990]	748	REAL(wp), DIMENSION(:,:), POINTER :: zpsi_h_u, zpsi_m_u
	749	REAL(wp), DIMENSION(:,:), POINTER :: ztmp0, ztmp1, ztmp2
	750	REAL(wp), DIMENSION(:,:), POINTER :: stab ! 1st stability test integer
[2528]	751	!!----------------------------------------------------------------------
[888]	752
[4990]	753	IF( nn_timing == 1 ) CALL timing_start('turb_core_2z')
[13191]	754
[4990]	755	CALL wrk_alloc( jpi,jpj, U_zu, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd )
	756	CALL wrk_alloc( jpi,jpj, zeta_u, stab )
	757	CALL wrk_alloc( jpi,jpj, zpsi_h_u, zpsi_m_u, ztmp0, ztmp1, ztmp2 )
[888]	758
[4990]	759	l_zt_equal_zu = .FALSE.
	760	IF( ABS(zu - zt) < 0.01 ) l_zt_equal_zu = .TRUE. ! testing "zu == zt" is risky with double precision
	761
	762	IF( .NOT. l_zt_equal_zu ) CALL wrk_alloc( jpi,jpj, zeta_t )
	763
	764	U_zu = MAX( 0.5 , dU ) ! relative wind speed at zu (normally 10m), we don't want to fall under 0.5 m/s
	765
[13191]	766	!! First guess of stability:
[4990]	767	ztmp0 = T_zt(1. + 0.608q_zt) - sst(1. + 0.608q_sat) ! air-sea difference of virtual pot. temp. at zt
	768	stab = 0.5 + sign(0.5,ztmp0) ! stab = 1 if dTv > 0 => STABLE, 0 if unstable
	769
	770	!! Neutral coefficients at 10m:
	771	IF( ln_cdgw ) THEN ! wave drag case
	772	cdn_wave(:,:) = cdn_wave(:,:) + rsmall * ( 1._wp - tmask(:,:,1) )
	773	ztmp0 (:,:) = cdn_wave(:,:)
[3294]	774	ELSE
[4990]	775	ztmp0 = cd_neutral_10m( U_zu )
[3294]	776	ENDIF
[4990]	777	sqrt_Cd_n10 = SQRT( ztmp0 )
[4333]	778	Ce_n10 = 1.e-3( 34.6 sqrt_Cd_n10 )
	779	Ch_n10 = 1.e-3sqrt_Cd_n10(18.stab + 32.7(1. - stab))
[13191]	780
[888]	781	!! Initializing transf. coeff. with their first guess neutral equivalents :
[4990]	782	Cd = ztmp0 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt_Cd_n10
[888]	783
[4990]	784	!! Initializing values at z_u with z_t values:
	785	T_zu = T_zt ; q_zu = q_zt
[888]	786
	787	!! * Now starting iteration loop
	788	DO j_itt=1, nb_itt
[4990]	789	!
	790	ztmp1 = T_zu - sst ! Updating air/sea differences
[13191]	791	ztmp2 = q_zu - q_sat
[4990]	792
	793	! Updating turbulent scales : (L&Y 2004 eq. (7))
	794	ztmp1 = Ch/sqrt_Cdztmp1 ! theta
	795	ztmp2 = Ce/sqrt_Cdztmp2 ! q
[13191]	796
[4990]	797	ztmp0 = T_zu(1. + 0.608q_zu) ! virtual potential temperature at zu
	798
	799	! Estimate the inverse of Monin-Obukov length (1/L) at height zu:
[13191]	800	ztmp0 = (vkarmngrav/ztmp0(ztmp1(1.+0.608q_zu) + 0.608T_zuztmp2)) / (CdU_zuU_zu)
[4990]	801	! ( CdU_zuU_zu is U*^2 at zu)
	802
[888]	803	!! Stability parameters :
[4990]	804	zeta_u = zu*ztmp0 ; zeta_u = sign( min(abs(zeta_u),10.0), zeta_u )
	805	zpsi_h_u = psi_h( zeta_u )
	806	zpsi_m_u = psi_m( zeta_u )
[13191]	807
[4990]	808	!! Shifting temperature and humidity at zu (L&Y 2004 eq. (9b-9c))
	809	IF ( .NOT. l_zt_equal_zu ) THEN
	810	zeta_t = zt*ztmp0 ; zeta_t = sign( min(abs(zeta_t),10.0), zeta_t )
	811	stab = LOG(zu/zt) - zpsi_h_u + psi_h(zeta_t) ! stab just used as temp array!!!
	812	T_zu = T_zt + ztmp1/vkarmnstab ! ztmp1 is still theta
	813	q_zu = q_zt + ztmp2/vkarmnstab ! ztmp2 is still q
	814	q_zu = max(0., q_zu)
	815	END IF
[13191]	816
[4990]	817	IF( ln_cdgw ) THEN ! surface wave case
[13191]	818	sqrt_Cd = vkarmn / ( vkarmn / sqrt_Cd_n10 - zpsi_m_u )
[4990]	819	Cd = sqrt_Cd * sqrt_Cd
[3294]	820	ELSE
[4990]	821	! Update neutral wind speed at 10m and neutral Cd at 10m (L&Y 2004 eq. 9a)...
	822	! In very rare low-wind conditions, the old way of estimating the
	823	! neutral wind speed at 10m leads to a negative value that causes the code
	824	! to crash. To prevent this a threshold of 0.25m/s is imposed.
	825	ztmp0 = MAX( 0.25 , U_zu/(1. + sqrt_Cd_n10/vkarmn*(LOG(zu/10.) - zpsi_m_u)) ) ! U_n10
	826	ztmp0 = cd_neutral_10m(ztmp0) ! Cd_n10
	827	sqrt_Cd_n10 = sqrt(ztmp0)
[13191]	828
[4990]	829	Ce_n10 = 1.e-3 * (34.6 * sqrt_Cd_n10) ! L&Y 2004 eq. (6b)
	830	stab = 0.5 + sign(0.5,zeta_u) ! update stability
	831	Ch_n10 = 1.e-3sqrt_Cd_n10(18.stab + 32.7(1. - stab)) ! L&Y 2004 eq. (6c-6d)
	832
	833	!! Update of transfer coefficients:
	834	ztmp1 = 1. + sqrt_Cd_n10/vkarmn*(LOG(zu/10.) - zpsi_m_u) ! L&Y 2004 eq. (10a)
[13191]	835	Cd = ztmp0 / ( ztmp1*ztmp1 )
[4990]	836	sqrt_Cd = SQRT( Cd )
[3294]	837	ENDIF
[4990]	838	!
	839	ztmp0 = (LOG(zu/10.) - zpsi_h_u) / vkarmn / sqrt_Cd_n10
	840	ztmp2 = sqrt_Cd / sqrt_Cd_n10
[13191]	841	ztmp1 = 1. + Ch_n10*ztmp0
[4990]	842	Ch = Ch_n10*ztmp2 / ztmp1 ! L&Y 2004 eq. (10b)
	843	!
[13191]	844	ztmp1 = 1. + Ce_n10*ztmp0
[4990]	845	Ce = Ce_n10*ztmp2 / ztmp1 ! L&Y 2004 eq. (10c)
	846	!
[888]	847	END DO
[4990]	848
	849	CALL wrk_dealloc( jpi,jpj, U_zu, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd )
	850	CALL wrk_dealloc( jpi,jpj, zeta_u, stab )
	851	CALL wrk_dealloc( jpi,jpj, zpsi_h_u, zpsi_m_u, ztmp0, ztmp1, ztmp2 )
	852
	853	IF( .NOT. l_zt_equal_zu ) CALL wrk_dealloc( jpi,jpj, zeta_t )
	854
	855	IF( nn_timing == 1 ) CALL timing_stop('turb_core_2z')
	856	!
	857	END SUBROUTINE turb_core_2z
	858
	859
	860	FUNCTION cd_neutral_10m( zw10 )
	861	!!----------------------------------------------------------------------
[13191]	862	!! Estimate of the neutral drag coefficient at 10m as a function
[4990]	863	!! of neutral wind speed at 10m
[888]	864	!!
[4990]	865	!! Origin: Large & Yeager 2008 eq.(11a) and eq.(11b)
	866	!!
	867	!! Author: L. Brodeau, june 2014
[13191]	868	!!----------------------------------------------------------------------
[4990]	869	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zw10 ! scalar wind speed at 10m (m/s)
	870	REAL(wp), DIMENSION(jpi,jpj) :: cd_neutral_10m
[2715]	871	!
[4990]	872	REAL(wp), DIMENSION(:,:), POINTER :: rgt33
[13191]	873	!!----------------------------------------------------------------------
[3294]	874	!
[4990]	875	CALL wrk_alloc( jpi,jpj, rgt33 )
	876	!
	877	!! When wind speed > 33 m/s => Cyclone conditions => special treatment
[13191]	878	rgt33 = 0.5_wp + SIGN( 0.5_wp, (zw10 - 33._wp) ) ! If zw10 < 33. => 0, else => 1
[4990]	879	cd_neutral_10m = 1.e-3 * ( &
[5065]	880	& (1._wp - rgt33)( 2.7_wp/zw10 + 0.142_wp + zw10/13.09_wp - 3.14807E-10zw10**6) & ! zw10< 33.
[4990]	881	& + rgt33 * 2.34 ) ! zw10 >= 33.
	882	!
	883	CALL wrk_dealloc( jpi,jpj, rgt33)
	884	!
	885	END FUNCTION cd_neutral_10m
[888]	886
	887
[4990]	888	FUNCTION psi_m(pta) !! Psis, L&Y 2004 eq. (8c), (8d), (8e)
[2715]	889	!-------------------------------------------------------------------------------
[4990]	890	! universal profile stability function for momentum
	891	!-------------------------------------------------------------------------------
	892	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pta
	893	!
[888]	894	REAL(wp), DIMENSION(jpi,jpj) :: psi_m
[3294]	895	REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit
[2715]	896	!-------------------------------------------------------------------------------
[4990]	897	!
[3294]	898	CALL wrk_alloc( jpi,jpj, X2, X, stabit )
[4990]	899	!
	900	X2 = SQRT( ABS( 1. - 16.*pta ) ) ; X2 = MAX( X2 , 1. ) ; X = SQRT( X2 )
	901	stabit = 0.5 + SIGN( 0.5 , pta )
	902	psi_m = -5.ptastabit & ! Stable
	903	& + (1. - stabit)(2.LOG((1. + X)0.5) + LOG((1. + X2)0.5) - 2.ATAN(X) + rpi0.5) ! Unstable
	904	!
[3294]	905	CALL wrk_dealloc( jpi,jpj, X2, X, stabit )
[2715]	906	!
[4990]	907	END FUNCTION psi_m
[888]	908
	909
[4990]	910	FUNCTION psi_h( pta ) !! Psis, L&Y 2004 eq. (8c), (8d), (8e)
[2715]	911	!-------------------------------------------------------------------------------
[4990]	912	! universal profile stability function for temperature and humidity
	913	!-------------------------------------------------------------------------------
	914	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pta
[2715]	915	!
	916	REAL(wp), DIMENSION(jpi,jpj) :: psi_h
[4990]	917	REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit
[2715]	918	!-------------------------------------------------------------------------------
[4990]	919	!
[3294]	920	CALL wrk_alloc( jpi,jpj, X2, X, stabit )
[4990]	921	!
	922	X2 = SQRT( ABS( 1. - 16.*pta ) ) ; X2 = MAX( X2 , 1. ) ; X = SQRT( X2 )
	923	stabit = 0.5 + SIGN( 0.5 , pta )
	924	psi_h = -5.ptastabit & ! Stable
	925	& + (1. - stabit)(2.LOG( (1. + X2)*0.5 )) ! Unstable
	926	!
[3294]	927	CALL wrk_dealloc( jpi,jpj, X2, X, stabit )
[2715]	928	!
[4990]	929	END FUNCTION psi_h
	930
[888]	931	!!======================================================================
	932	END MODULE sbcblk_core

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