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sbcblk_core.F90 in branches/2016/dev_r6519_HPC_4/NEMOGCM/NEMO/OPA_SRC/SBC – NEMO

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source: branches/2016/dev_r6519_HPC_4/NEMOGCM/NEMO/OPA_SRC/SBC/sbcblk_core.F90 @ 7508

Last change on this file since 7508 was 7508, checked in by mocavero, 7 years ago
changes on code duplication and workshare construct
Property svn:keywords set to `Id`
File size: 53.7 KB

Line
1	MODULE sbcblk_core
2	!!======================================================================
3	!! * MODULE sbcblk_core *
4	!! Ocean forcing: momentum, heat and freshwater flux formulation
5	!!=====================================================================
6	!! History : 1.0 ! 2004-08 (U. Schweckendiek) Original code
7	!! 2.0 ! 2005-04 (L. Brodeau, A.M. Treguier) additions:
8	!! - new bulk routine for efficiency
9	!! - WINDS ARE NOW ASSUMED TO BE AT T POINTS in input files !!!!
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
14	!! 3.2 ! 2009-04 (B. Lemaire) Introduce iom_put
15	!! 3.3 ! 2010-10 (S. Masson) add diurnal cycle
16	!! 3.4 ! 2011-11 (C. Harris) Fill arrays required by CICE
17	!! 3.7 ! 2014-06 (L. Brodeau) simplification and optimization of CORE bulk
18	!!----------------------------------------------------------------------
19
20	!!----------------------------------------------------------------------
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
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
34	USE cyclone ! Cyclone 10m wind form trac of cyclone centres
35	USE sbcdcy ! surface boundary condition: diurnal cycle
36	USE sbcwave , ONLY : cdn_wave ! wave module
37	USE sbc_ice ! Surface boundary condition: ice fields
38	USE lib_fortran ! to use key_nosignedzero
39	#if defined key_lim3
40	USE ice , ONLY : u_ice, v_ice, jpl, pfrld, a_i_b
41	USE limthd_dh ! for CALL lim_thd_snwblow
42	#elif defined key_lim2
43	USE ice_2 , ONLY : u_ice, v_ice
44	USE par_ice_2 ! LIM-2 parameters
45	#endif
46	!
47	USE iom ! I/O manager library
48	USE in_out_manager ! I/O manager
49	USE lib_mpp ! distribued memory computing library
50	USE wrk_nemo ! work arrays
51	USE timing ! Timing
52	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
53	USE prtctl ! Print control
54
55	IMPLICIT NONE
56	PRIVATE
57
58	PUBLIC sbc_blk_core ! routine called in sbcmod module
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
63	PUBLIC turb_core_2z ! routine calles in sbcblk_mfs module
64
65	INTEGER , PARAMETER :: jpfld = 9 ! maximum number of files to read
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
68	INTEGER , PARAMETER :: jp_humi = 3 ! index of specific humidity ( % )
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)
74	INTEGER , PARAMETER :: jp_tdif = 9 ! index of tau diff associated to HF tau (N/m2) at T-point
75
76	TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf ! structure of input fields (file informations, fields read)
77
78	! !!! CORE bulk parameters
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
84	REAL(wp), PARAMETER :: Cice = 1.4e-3 ! iovi 1.63e-3 ! transfer coefficient over ice
85	REAL(wp), PARAMETER :: albo = 0.066 ! ocean albedo assumed to be constant
86
87	! !!* Namelist namsbc_core : CORE bulk parameters
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
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)
92	REAL(wp) :: rn_zqt ! z(q,t) : height of humidity and temperature measurements
93	REAL(wp) :: rn_zu ! z(u) : height of wind measurements
94
95	!! * Substitutions
96	# include "vectopt_loop_substitute.h90"
97	!!----------------------------------------------------------------------
98	!! NEMO/OPA 3.7 , NEMO-consortium (2014)
99	!! $Id$
100	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
101	!!----------------------------------------------------------------------
102	CONTAINS
103
104	SUBROUTINE sbc_blk_core( kt )
105	!!---------------------------------------------------------------------
106	!! * ROUTINE sbc_blk_core *
107	!!
108	!! ** Purpose : provide at each time step the surface ocean fluxes
109	!! (momentum, heat, freshwater and runoff)
110	!!
111	!! ** Method : (1) READ each fluxes in NetCDF files:
112	!! the 10m wind velocity (i-component) (m/s) at T-point
113	!! the 10m wind velocity (j-component) (m/s) at T-point
114	!! the 10m or 2m specific humidity ( % )
115	!! the solar heat (W/m2)
116	!! the Long wave (W/m2)
117	!! the 10m or 2m air temperature (Kelvin)
118	!! the total precipitation (rain+snow) (Kg/m2/s)
119	!! the snow (solid prcipitation) (kg/m2/s)
120	!! the tau diff associated to HF tau (N/m2) at T-point (ln_taudif=T)
121	!! (2) CALL blk_oce_core
122	!!
123	!! C A U T I O N : never mask the surface stress fields
124	!! the stress is assumed to be in the (i,j) mesh referential
125	!!
126	!! ** Action : defined at each time-step at the air-sea interface
127	!! - utau, vtau i- and j-component of the wind stress
128	!! - taum wind stress module at T-point
129	!! - wndm wind speed module at T-point over free ocean or leads in presence of sea-ice
130	!! - qns, qsr non-solar and solar heat fluxes
131	!! - emp upward mass flux (evapo. - precip.)
132	!! - sfx salt flux due to freezing/melting (non-zero only if ice is present)
133	!! (set in limsbc(_2).F90)
134	!!
135	!! ** References : Large & Yeager, 2004 / Large & Yeager, 2008
136	!! Brodeau et al. Ocean Modelling 2010
137	!!----------------------------------------------------------------------
138	INTEGER, INTENT(in) :: kt ! ocean time step
139	!
140	INTEGER :: ierror ! return error code
141	INTEGER :: ifpr ! dummy loop indice
142	INTEGER :: jfld ! dummy loop arguments
143	INTEGER :: ji, jj ! dummy loop indices
144	INTEGER :: ios ! Local integer output status for namelist read
145	!
146	CHARACTER(len=100) :: cn_dir ! Root directory for location of core files
147	TYPE(FLD_N), DIMENSION(jpfld) :: slf_i ! array of namelist informations on the fields to read
148	TYPE(FLD_N) :: sn_wndi, sn_wndj, sn_humi, sn_qsr ! informations about the fields to be read
149	TYPE(FLD_N) :: sn_qlw , sn_tair, sn_prec, sn_snow ! " "
150	TYPE(FLD_N) :: sn_tdif ! " "
151	NAMELIST/namsbc_core/ cn_dir , ln_taudif, rn_pfac, rn_efac, rn_vfac, &
152	& sn_wndi, sn_wndj , sn_humi, sn_qsr , &
153	& sn_qlw , sn_tair , sn_prec, sn_snow, &
154	& sn_tdif, rn_zqt , rn_zu
155	!!---------------------------------------------------------------------
156	!
157	! ! ====================== !
158	IF( kt == nit000 ) THEN ! First call kt=nit000 !
159	! ! ====================== !
160	!
161	REWIND( numnam_ref ) ! Namelist namsbc_core in reference namelist : CORE bulk parameters
162	READ ( numnam_ref, namsbc_core, IOSTAT = ios, ERR = 901)
163	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_core in reference namelist', lwp )
164	!
165	REWIND( numnam_cfg ) ! Namelist namsbc_core in configuration namelist : CORE bulk parameters
166	READ ( numnam_cfg, namsbc_core, IOSTAT = ios, ERR = 902 )
167	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_core in configuration namelist', lwp )
168
169	IF(lwm) WRITE( numond, namsbc_core )
170	! ! check: do we plan to use ln_dm2dc with non-daily forcing?
171	IF( ln_dm2dc .AND. sn_qsr%nfreqh /= 24 ) &
172	& CALL ctl_stop( 'sbc_blk_core: ln_dm2dc can be activated only with daily short-wave forcing' )
173	IF( ln_dm2dc .AND. sn_qsr%ln_tint ) THEN
174	CALL ctl_warn( 'sbc_blk_core: ln_dm2dc is taking care of the temporal interpolation of daily qsr', &
175	& ' ==> We force time interpolation = .false. for qsr' )
176	sn_qsr%ln_tint = .false.
177	ENDIF
178	! ! store namelist information in an array
179	slf_i(jp_wndi) = sn_wndi ; slf_i(jp_wndj) = sn_wndj
180	slf_i(jp_qsr ) = sn_qsr ; slf_i(jp_qlw ) = sn_qlw
181	slf_i(jp_tair) = sn_tair ; slf_i(jp_humi) = sn_humi
182	slf_i(jp_prec) = sn_prec ; slf_i(jp_snow) = sn_snow
183	slf_i(jp_tdif) = sn_tdif
184	!
185	lhftau = ln_taudif ! do we use HF tau information?
186	jfld = jpfld - COUNT( (/.NOT. lhftau/) )
187	!
188	ALLOCATE( sf(jfld), STAT=ierror ) ! set sf structure
189	IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_blk_core: unable to allocate sf structure' )
190	DO ifpr= 1, jfld
191	ALLOCATE( sf(ifpr)%fnow(jpi,jpj,1) )
192	IF( slf_i(ifpr)%ln_tint ) ALLOCATE( sf(ifpr)%fdta(jpi,jpj,1,2) )
193	END DO
194	! ! fill sf with slf_i and control print
195	CALL fld_fill( sf, slf_i, cn_dir, 'sbc_blk_core', 'flux formulation for ocean surface boundary condition', 'namsbc_core' )
196	!
197	!$OMP PARALLEL DO schedule(static) private(jj, ji)
198	DO jj = 1, jpj
199	DO ji = 1, jpi
200	sfx(ji,jj) = 0._wp ! salt flux; zero unless ice is present (computed in limsbc(_2).F90)
201	END DO
202	END DO
203	ENDIF
204
205	CALL fld_read( kt, nn_fsbc, sf ) ! input fields provided at the current time-step
206
207	! ! compute the surface ocean fluxes using CORE bulk formulea
208	IF( MOD( kt - 1, nn_fsbc ) == 0 ) CALL blk_oce_core( kt, sf, sst_m, ssu_m, ssv_m )
209
210	#if defined key_cice
211	IF( MOD( kt - 1, nn_fsbc ) == 0 ) THEN
212	!$OMP PARALLEL DO schedule(static) private(jj, ji)
213	DO jj = 1, jpj
214	DO ji = 1, jpi
215	qlw_ice(ji,jj,1) = sf(jp_qlw)%fnow(ji,jj,1)
216	qsr_ice(ji,jj,1) = sf(jp_qsr)%fnow(ji,jj,1)
217	tatm_ice(ji,jj) = sf(jp_tair)%fnow(ji,jj,1)
218	qatm_ice(ji,jj) = sf(jp_humi)%fnow(ji,jj,1)
219	tprecip(ji,jj) = sf(jp_prec)%fnow(ji,jj,1) * rn_pfac
220	sprecip(ji,jj) = sf(jp_snow)%fnow(ji,jj,1) * rn_pfac
221	wndi_ice(ji,jj) = sf(jp_wndi)%fnow(ji,jj,1)
222	wndj_ice(ji,jj) = sf(jp_wndj)%fnow(ji,jj,1)
223	END DO
224	END DO
225	ENDIF
226	#endif
227	!
228	END SUBROUTINE sbc_blk_core
229
230
231	SUBROUTINE blk_oce_core( kt, sf, pst, pu, pv )
232	!!---------------------------------------------------------------------
233	!! * ROUTINE blk_core *
234	!!
235	!! ** Purpose : provide the momentum, heat and freshwater fluxes at
236	!! the ocean surface at each time step
237	!!
238	!! ** Method : CORE bulk formulea for the ocean using atmospheric
239	!! fields read in sbc_read
240	!!
241	!! ** Outputs : - utau : i-component of the stress at U-point (N/m2)
242	!! - vtau : j-component of the stress at V-point (N/m2)
243	!! - taum : Wind stress module at T-point (N/m2)
244	!! - wndm : Wind speed module at T-point (m/s)
245	!! - qsr : Solar heat flux over the ocean (W/m2)
246	!! - qns : Non Solar heat flux over the ocean (W/m2)
247	!! - emp : evaporation minus precipitation (kg/m2/s)
248	!!
249	!! ** Nota : sf has to be a dummy argument for AGRIF on NEC
250	!!---------------------------------------------------------------------
251	INTEGER , INTENT(in ) :: kt ! time step index
252	TYPE(fld), INTENT(inout), DIMENSION(:) :: sf ! input data
253	REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pst ! surface temperature [Celcius]
254	REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pu ! surface current at U-point (i-component) [m/s]
255	REAL(wp) , INTENT(in) , DIMENSION(:,:) :: pv ! surface current at V-point (j-component) [m/s]
256	!
257	INTEGER :: ji, jj ! dummy loop indices
258	REAL(wp) :: zcoef_qsatw, zztmp ! local variable
259	REAL(wp), DIMENSION(:,:), POINTER :: zwnd_i, zwnd_j ! wind speed components at T-point
260	REAL(wp), DIMENSION(:,:), POINTER :: zqsatw ! specific humidity at pst
261	REAL(wp), DIMENSION(:,:), POINTER :: zqlw, zqsb ! long wave and sensible heat fluxes
262	REAL(wp), DIMENSION(:,:), POINTER :: zqla, zevap ! latent heat fluxes and evaporation
263	REAL(wp), DIMENSION(:,:), POINTER :: Cd ! transfer coefficient for momentum (tau)
264	REAL(wp), DIMENSION(:,:), POINTER :: Ch ! transfer coefficient for sensible heat (Q_sens)
265	REAL(wp), DIMENSION(:,:), POINTER :: Ce ! tansfert coefficient for evaporation (Q_lat)
266	REAL(wp), DIMENSION(:,:), POINTER :: zst ! surface temperature in Kelvin
267	REAL(wp), DIMENSION(:,:), POINTER :: zt_zu ! air temperature at wind speed height
268	REAL(wp), DIMENSION(:,:), POINTER :: zq_zu ! air spec. hum. at wind speed height
269	!!---------------------------------------------------------------------
270	!
271	IF( nn_timing == 1 ) CALL timing_start('blk_oce_core')
272	!
273	CALL wrk_alloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap )
274	CALL wrk_alloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu )
275	!
276	! local scalars ( place there for vector optimisation purposes)
277	zcoef_qsatw = 0.98 * 640380. / rhoa
278
279	!$OMP PARALLEL DO schedule(static) private(jj, ji)
280	DO jj = 1, jpj
281	DO ji = 1, jpi
282	zst(ji,jj) = pst(ji,jj) + rt0 ! convert SST from Celcius to Kelvin (and set minimum value far above 0 K)
283
284	! ----------------------------------------------------------------------------- !
285	! 0 Wind components and module at T-point relative to the moving ocean !
286	! ----------------------------------------------------------------------------- !
287
288	! ... components ( U10m - U_oce ) at T-point (unmasked)
289	zwnd_i(ji,jj) = 0.e0
290	zwnd_j(ji,jj) = 0.e0
291	END DO
292	END DO
293	#if defined key_cyclone
294	CALL wnd_cyc( kt, zwnd_i, zwnd_j ) ! add analytical tropical cyclone (Vincent et al. JGR 2012)
295	!$OMP PARALLEL DO schedule(static) private(jj, ji)
296	DO jj = 2, jpjm1
297	DO ji = fs_2, fs_jpim1 ! vect. opt.
298	sf(jp_wndi)%fnow(ji,jj,1) = sf(jp_wndi)%fnow(ji,jj,1) + zwnd_i(ji,jj)
299	sf(jp_wndj)%fnow(ji,jj,1) = sf(jp_wndj)%fnow(ji,jj,1) + zwnd_j(ji,jj)
300	END DO
301	END DO
302	#endif
303	!$OMP PARALLEL DO schedule(static) private(jj, ji)
304	DO jj = 2, jpjm1
305	DO ji = fs_2, fs_jpim1 ! vect. opt.
306	zwnd_i(ji,jj) = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pu(ji-1,jj ) + pu(ji,jj) ) )
307	zwnd_j(ji,jj) = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pv(ji ,jj-1) + pv(ji,jj) ) )
308	END DO
309	END DO
310	CALL lbc_lnk( zwnd_i(:,:) , 'T', -1. )
311	CALL lbc_lnk( zwnd_j(:,:) , 'T', -1. )
312	! ... scalar wind ( = \| U10m - U_oce \| ) at T-point (masked)
313	!$OMP PARALLEL DO schedule(static) private(jj, ji)
314	DO jj = 1, jpj
315	DO ji = 1, jpi
316	wndm(ji,jj) = SQRT( zwnd_i(ji,jj) * zwnd_i(ji,jj) &
317	& + zwnd_j(ji,jj) * zwnd_j(ji,jj) ) * tmask(ji,jj,1)
318
319	END DO
320	END DO
321	! ----------------------------------------------------------------------------- !
322	! I Radiative FLUXES !
323	! ----------------------------------------------------------------------------- !
324
325	! ocean albedo assumed to be constant + modify now Qsr to include the diurnal cycle ! Short Wave
326	zztmp = 1. - albo
327	IF( ln_dm2dc ) THEN
328	qsr(:,:) = zztmp * sbc_dcy( sf(jp_qsr)%fnow(:,:,1) ) * tmask(:,:,1)
329	ELSE
330	qsr(:,:) = zztmp * sf(jp_qsr)%fnow(:,:,1) * tmask(:,:,1)
331	ENDIF
332
333	!$OMP PARALLEL DO schedule(static) private(jj, ji)
334	DO jj = 1, jpj
335	DO ji = 1, jpi
336	zqlw(ji,jj) = ( sf(jp_qlw)%fnow(ji,jj,1) - Stef * zst(ji,jj)zst(ji,jj)zst(ji,jj)zst(ji,jj) ) tmask(ji,jj,1) ! Long Wave
337	! ----------------------------------------------------------------------------- !
338	! II Turbulent FLUXES !
339	! ----------------------------------------------------------------------------- !
340
341	! ... specific humidity at SST and IST
342	zqsatw(ji,jj) = zcoef_qsatw * EXP( -5107.4 / zst(ji,jj) )
343
344	END DO
345	END DO
346	! ... NCAR Bulk formulae, computation of Cd, Ch, Ce at T-point :
347	CALL turb_core_2z( rn_zqt, rn_zu, zst, sf(jp_tair)%fnow, zqsatw, sf(jp_humi)%fnow, wndm, &
348	& Cd, Ch, Ce, zt_zu, zq_zu )
349
350	! ... tau module, i and j component
351	!$OMP PARALLEL DO schedule(static) private(jj, ji,zztmp)
352	DO jj = 1, jpj
353	DO ji = 1, jpi
354	zztmp = rhoa * wndm(ji,jj) * Cd(ji,jj)
355	taum (ji,jj) = zztmp * wndm (ji,jj)
356	zwnd_i(ji,jj) = zztmp * zwnd_i(ji,jj)
357	zwnd_j(ji,jj) = zztmp * zwnd_j(ji,jj)
358	END DO
359	END DO
360
361	! ... add the HF tau contribution to the wind stress module?
362	IF( lhftau ) THEN
363	!$OMP PARALLEL DO schedule(static) private(jj, ji)
364	DO jj = 1, jpj
365	DO ji = 1, jpi
366	taum(ji,jj) = taum(ji,jj) + sf(jp_tdif)%fnow(ji,jj,1)
367	END DO
368	END DO
369	ENDIF
370	CALL iom_put( "taum_oce", taum ) ! output wind stress module
371
372	! ... utau, vtau at U- and V_points, resp.
373	! Note the use of 0.5*(2-umask) in order to unmask the stress along coastlines
374	! Note the use of MAX(tmask(i,j),tmask(i+1,j) is to mask tau over ice shelves
375	!$OMP PARALLEL DO schedule(static) private(jj, ji)
376	DO jj = 1, jpjm1
377	DO ji = 1, fs_jpim1
378	utau(ji,jj) = 0.5 * ( 2. - umask(ji,jj,1) ) * ( zwnd_i(ji,jj) + zwnd_i(ji+1,jj ) ) &
379	& * MAX(tmask(ji,jj,1),tmask(ji+1,jj,1))
380	vtau(ji,jj) = 0.5 * ( 2. - vmask(ji,jj,1) ) * ( zwnd_j(ji,jj) + zwnd_j(ji ,jj+1) ) &
381	& * MAX(tmask(ji,jj,1),tmask(ji,jj+1,1))
382	END DO
383	END DO
384	CALL lbc_lnk( utau(:,:), 'U', -1. )
385	CALL lbc_lnk( vtau(:,:), 'V', -1. )
386
387
388	! Turbulent fluxes over ocean
389	! -----------------------------
390	!$OMP PARALLEL DO schedule(static) private(jj, ji)
391	DO jj = 1, jpj
392	DO ji = 1, jpi
393	IF( ABS( rn_zu - rn_zqt) < 0.01_wp ) THEN
394	!! q_air and t_air are (or "are almost") given at 10m (wind reference height)
395	zevap(ji,jj) = rn_efacMAX( 0._wp, rhoaCe(ji,jj)( zqsatw(ji,jj) - sf(jp_humi)%fnow(ji,jj,1) )wndm(ji,jj) ) ! Evaporation
396	zqsb (ji,jj) = cparhoaCh(ji,jj)( zst (ji,jj) - sf(jp_tair)%fnow(ji,jj,1) )wndm(ji,jj) ! Sensible Heat
397	ELSE
398	!! q_air and t_air are not given at 10m (wind reference height)
399	! Values of temp. and hum. adjusted to height of wind during bulk algorithm iteration must be used!!!
400	zevap(ji,jj) = rn_efacMAX( 0._wp, rhoaCe(ji,jj)( zqsatw(ji,jj) - zq_zu(ji,jj) )wndm(ji,jj) ) ! Evaporation
401	zqsb (ji,jj) = cparhoaCh(ji,jj)( zst (ji,jj) - zt_zu(ji,jj) )wndm(ji,jj) ! Sensible Heat
402	ENDIF
403	zqla (ji,jj) = Lv * zevap(ji,jj) ! Latent Heat
404	END DO
405	END DO
406	IF(ln_ctl) THEN
407	CALL prt_ctl( tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=Ce , clinfo2=' Ce : ' )
408	CALL prt_ctl( tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=Ch , clinfo2=' Ch : ' )
409	CALL prt_ctl( tab2d_1=zqlw , clinfo1=' blk_oce_core: zqlw : ', tab2d_2=qsr, clinfo2=' qsr : ' )
410	CALL prt_ctl( tab2d_1=zqsatw, clinfo1=' blk_oce_core: zqsatw : ', tab2d_2=zst, clinfo2=' zst : ' )
411	CALL prt_ctl( tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, &
412	& tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask )
413	CALL prt_ctl( tab2d_1=wndm , clinfo1=' blk_oce_core: wndm : ')
414	CALL prt_ctl( tab2d_1=zst , clinfo1=' blk_oce_core: zst : ')
415	ENDIF
416
417	! ----------------------------------------------------------------------------- !
418	! III Total FLUXES !
419	! ----------------------------------------------------------------------------- !
420	!
421	!$OMP PARALLEL DO schedule(static) private(jj, ji)
422	DO jj = 1, jpj
423	DO ji = 1, jpi
424	emp (ji,jj) = ( zevap(ji,jj) & ! mass flux (evap. - precip.)
425	& - sf(jp_prec)%fnow(ji,jj,1) * rn_pfac ) * tmask(ji,jj,1)
426	!
427	qns(ji,jj) = zqlw(ji,jj) - zqsb(ji,jj) - zqla(ji,jj) & ! Downward Non Solar
428	& - sf(jp_snow)%fnow(ji,jj,1) * rn_pfac * lfus & ! remove latent melting heat for solid precip
429	& - zevap(ji,jj) * pst(ji,jj) * rcp & ! remove evap heat content at SST
430	& + ( sf(jp_prec)%fnow(ji,jj,1) - sf(jp_snow)%fnow(ji,jj,1) ) * rn_pfac & ! add liquid precip heat content at Tair
431	& * ( sf(jp_tair)%fnow(ji,jj,1) - rt0 ) * rcp &
432	& + sf(jp_snow)%fnow(ji,jj,1) * rn_pfac & ! add solid precip heat content at min(Tair,Tsnow)
433	& * ( MIN( sf(jp_tair)%fnow(ji,jj,1), rt0_snow ) - rt0 ) * cpic * tmask(ji,jj,1)
434	END DO
435	END DO
436	!
437	#if defined key_lim3
438	!$OMP PARALLEL DO schedule(static) private(jj, ji)
439	DO jj = 1, jpj
440	DO ji = 1, jpi
441	qns_oce(ji,jj) = zqlw(ji,jj) - zqsb(ji,jj) - zqla(ji,jj) ! non solar without emp (only needed by LIM3)
442	qsr_oce(ji,jj) = qsr(ji,jj)
443	END DO
444	END DO
445	#endif
446	!
447	IF ( nn_ice == 0 ) THEN
448	CALL iom_put( "qlw_oce" , zqlw ) ! output downward longwave heat over the ocean
449	CALL iom_put( "qsb_oce" , - zqsb ) ! output downward sensible heat over the ocean
450	CALL iom_put( "qla_oce" , - zqla ) ! output downward latent heat over the ocean
451	CALL iom_put( "qemp_oce", qns-zqlw+zqsb+zqla ) ! output downward heat content of E-P over the ocean
452	CALL iom_put( "qns_oce" , qns ) ! output downward non solar heat over the ocean
453	CALL iom_put( "qsr_oce" , qsr ) ! output downward solar heat over the ocean
454	CALL iom_put( "qt_oce" , qns+qsr ) ! output total downward heat over the ocean
455	!$OMP PARALLEL DO schedule(static) private(jj, ji)
456	DO jj = 1, jpj
457	DO ji = 1, jpi
458	tprecip(ji,jj) = sf(jp_prec)%fnow(ji,jj,1) * rn_pfac ! output total precipitation [kg/m2/s]
459	sprecip(ji,jj) = sf(jp_snow)%fnow(ji,jj,1) * rn_pfac ! output solid precipitation [kg/m2/s]
460	END DO
461	END DO
462	CALL iom_put( 'snowpre', sprecip * 86400. ) ! Snow
463	CALL iom_put( 'precip' , tprecip * 86400. ) ! Total precipitation
464	ENDIF
465	!
466	IF(ln_ctl) THEN
467	CALL prt_ctl(tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=zqlw , clinfo2=' zqlw : ')
468	CALL prt_ctl(tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=qsr , clinfo2=' qsr : ')
469	CALL prt_ctl(tab2d_1=pst , clinfo1=' blk_oce_core: pst : ', tab2d_2=emp , clinfo2=' emp : ')
470	CALL prt_ctl(tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, &
471	& tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask )
472	ENDIF
473	!
474	CALL wrk_dealloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap )
475	CALL wrk_dealloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu )
476	!
477	IF( nn_timing == 1 ) CALL timing_stop('blk_oce_core')
478	!
479	END SUBROUTINE blk_oce_core
480
481
482	#if defined key_lim2 \|\| defined key_lim3
483	SUBROUTINE blk_ice_core_tau
484	!!---------------------------------------------------------------------
485	!! * ROUTINE blk_ice_core_tau *
486	!!
487	!! ** Purpose : provide the surface boundary condition over sea-ice
488	!!
489	!! ** Method : compute momentum using CORE bulk
490	!! formulea, ice variables and read atmospheric fields.
491	!! NB: ice drag coefficient is assumed to be a constant
492	!!---------------------------------------------------------------------
493	INTEGER :: ji, jj ! dummy loop indices
494	REAL(wp) :: zcoef_wnorm, zcoef_wnorm2
495	REAL(wp) :: zwnorm_f, zwndi_f , zwndj_f ! relative wind module and components at F-point
496	REAL(wp) :: zwndi_t , zwndj_t ! relative wind components at T-point
497	!!---------------------------------------------------------------------
498	!
499	IF( nn_timing == 1 ) CALL timing_start('blk_ice_core_tau')
500	!
501	! local scalars ( place there for vector optimisation purposes)
502	zcoef_wnorm = rhoa * Cice
503	zcoef_wnorm2 = rhoa * Cice * 0.5
504
505	!!gm brutal....
506	!$OMP PARALLEL DO schedule(static) private(jj, ji)
507	DO jj = 1, jpj
508	DO ji = 1, jpi
509	utau_ice (ji,jj) = 0._wp
510	vtau_ice (ji,jj) = 0._wp
511	wndm_ice (ji,jj) = 0._wp
512	END DO
513	END DO
514	!!gm end
515
516	! ----------------------------------------------------------------------------- !
517	! Wind components and module relative to the moving ocean ( U10m - U_ice ) !
518	! ----------------------------------------------------------------------------- !
519	SELECT CASE( cp_ice_msh )
520	CASE( 'I' ) ! B-grid ice dynamics : I-point (i.e. F-point with sea-ice indexation)
521	! and scalar wind at T-point ( = \| U10m - U_ice \| ) (masked)
522	!$OMP PARALLEL DO schedule(static) private(jj,ji,zwndi_f,zwndj_f,zwnorm_f,zwndi_t,zwndj_t)
523	DO jj = 2, jpjm1
524	DO ji = 2, jpim1 ! B grid : NO vector opt
525	! ... scalar wind at I-point (fld being at T-point)
526	zwndi_f = 0.25 * ( sf(jp_wndi)%fnow(ji-1,jj ,1) + sf(jp_wndi)%fnow(ji ,jj ,1) &
527	& + sf(jp_wndi)%fnow(ji-1,jj-1,1) + sf(jp_wndi)%fnow(ji ,jj-1,1) ) - rn_vfac * u_ice(ji,jj)
528	zwndj_f = 0.25 * ( sf(jp_wndj)%fnow(ji-1,jj ,1) + sf(jp_wndj)%fnow(ji ,jj ,1) &
529	& + sf(jp_wndj)%fnow(ji-1,jj-1,1) + sf(jp_wndj)%fnow(ji ,jj-1,1) ) - rn_vfac * v_ice(ji,jj)
530	zwnorm_f = zcoef_wnorm * SQRT( zwndi_f * zwndi_f + zwndj_f * zwndj_f )
531	! ... ice stress at I-point
532	utau_ice(ji,jj) = zwnorm_f * zwndi_f
533	vtau_ice(ji,jj) = zwnorm_f * zwndj_f
534	! ... scalar wind at T-point (fld being at T-point)
535	zwndi_t = sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( u_ice(ji,jj+1) + u_ice(ji+1,jj+1) &
536	& + u_ice(ji,jj ) + u_ice(ji+1,jj ) )
537	zwndj_t = sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( v_ice(ji,jj+1) + v_ice(ji+1,jj+1) &
538	& + v_ice(ji,jj ) + v_ice(ji+1,jj ) )
539	wndm_ice(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1)
540	END DO
541	END DO
542	CALL lbc_lnk( utau_ice, 'I', -1. )
543	CALL lbc_lnk( vtau_ice, 'I', -1. )
544	CALL lbc_lnk( wndm_ice, 'T', 1. )
545	!
546	CASE( 'C' ) ! C-grid ice dynamics : U & V-points (same as ocean)
547	!$OMP PARALLEL
548	!$OMP DO schedule(static) private(jj,ji,zwndi_t,zwndj_t)
549	DO jj = 2, jpj
550	DO ji = fs_2, jpi ! vect. opt.
551	zwndi_t = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( u_ice(ji-1,jj ) + u_ice(ji,jj) ) )
552	zwndj_t = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( v_ice(ji ,jj-1) + v_ice(ji,jj) ) )
553	wndm_ice(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1)
554	END DO
555	END DO
556	!$OMP DO schedule(static) private(jj,ji)
557	DO jj = 2, jpjm1
558	DO ji = fs_2, fs_jpim1 ! vect. opt.
559	utau_ice(ji,jj) = zcoef_wnorm2 * ( wndm_ice(ji+1,jj ) + wndm_ice(ji,jj) ) &
560	& * ( 0.5 * (sf(jp_wndi)%fnow(ji+1,jj,1) + sf(jp_wndi)%fnow(ji,jj,1) ) - rn_vfac * u_ice(ji,jj) )
561	vtau_ice(ji,jj) = zcoef_wnorm2 * ( wndm_ice(ji,jj+1 ) + wndm_ice(ji,jj) ) &
562	& * ( 0.5 * (sf(jp_wndj)%fnow(ji,jj+1,1) + sf(jp_wndj)%fnow(ji,jj,1) ) - rn_vfac * v_ice(ji,jj) )
563	END DO
564	END DO
565	!$OMP END PARALLEL
566	CALL lbc_lnk( utau_ice, 'U', -1. )
567	CALL lbc_lnk( vtau_ice, 'V', -1. )
568	CALL lbc_lnk( wndm_ice, 'T', 1. )
569	!
570	END SELECT
571
572	IF(ln_ctl) THEN
573	CALL prt_ctl(tab2d_1=utau_ice , clinfo1=' blk_ice_core: utau_ice : ', tab2d_2=vtau_ice , clinfo2=' vtau_ice : ')
574	CALL prt_ctl(tab2d_1=wndm_ice , clinfo1=' blk_ice_core: wndm_ice : ')
575	ENDIF
576
577	IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core_tau')
578
579	END SUBROUTINE blk_ice_core_tau
580
581
582	SUBROUTINE blk_ice_core_flx( ptsu, palb )
583	!!---------------------------------------------------------------------
584	!! * ROUTINE blk_ice_core_flx *
585	!!
586	!! ** Purpose : provide the surface boundary condition over sea-ice
587	!!
588	!! ** Method : compute heat and freshwater exchanged
589	!! between atmosphere and sea-ice using CORE bulk
590	!! formulea, ice variables and read atmmospheric fields.
591	!!
592	!! caution : the net upward water flux has with mm/day unit
593	!!---------------------------------------------------------------------
594	REAL(wp), DIMENSION(:,:,:), INTENT(in) :: ptsu ! sea ice surface temperature
595	REAL(wp), DIMENSION(:,:,:), INTENT(in) :: palb ! ice albedo (all skies)
596	!!
597	INTEGER :: ji, jj, jl ! dummy loop indices
598	REAL(wp) :: zst2, zst3
599	REAL(wp) :: zcoef_dqlw, zcoef_dqla, zcoef_dqsb
600	REAL(wp) :: zztmp, z1_lsub ! temporary variable
601	!!
602	REAL(wp), DIMENSION(:,:,:), POINTER :: z_qlw ! long wave heat flux over ice
603	REAL(wp), DIMENSION(:,:,:), POINTER :: z_qsb ! sensible heat flux over ice
604	REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqlw ! long wave heat sensitivity over ice
605	REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqsb ! sensible heat sensitivity over ice
606	REAL(wp), DIMENSION(:,:) , POINTER :: zevap, zsnw ! evaporation and snw distribution after wind blowing (LIM3)
607	!!---------------------------------------------------------------------
608	!
609	IF( nn_timing == 1 ) CALL timing_start('blk_ice_core_flx')
610	!
611	CALL wrk_alloc( jpi,jpj,jpl, z_qlw, z_qsb, z_dqlw, z_dqsb )
612
613	! local scalars ( place there for vector optimisation purposes)
614	zcoef_dqlw = 4.0 * 0.95 * Stef
615	zcoef_dqla = -Ls * Cice * 11637800. * (-5897.8)
616	zcoef_dqsb = rhoa * cpa * Cice
617
618	zztmp = 1. / ( 1. - albo )
619	! ! ========================== !
620	!$OMP PARALLEL
621	!$OMP DO schedule(static) private(jl,jj,ji,zst2,zst3)
622	DO jl = 1, jpl ! Loop over ice categories !
623	! ! ========================== !
624	DO jj = 1 , jpj
625	DO ji = 1, jpi
626	! ----------------------------!
627	! I Radiative FLUXES !
628	! ----------------------------!
629	zst2 = ptsu(ji,jj,jl) * ptsu(ji,jj,jl)
630	zst3 = ptsu(ji,jj,jl) * zst2
631	! Short Wave (sw)
632	qsr_ice(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr(ji,jj)
633	! Long Wave (lw)
634	z_qlw(ji,jj,jl) = 0.95 * ( sf(jp_qlw)%fnow(ji,jj,1) - Stef * ptsu(ji,jj,jl) * zst3 ) * tmask(ji,jj,1)
635	! lw sensitivity
636	z_dqlw(ji,jj,jl) = zcoef_dqlw * zst3
637
638	! ----------------------------!
639	! II Turbulent FLUXES !
640	! ----------------------------!
641
642	! ... turbulent heat fluxes
643	! Sensible Heat
644	z_qsb(ji,jj,jl) = rhoa * cpa * Cice * wndm_ice(ji,jj) * ( ptsu(ji,jj,jl) - sf(jp_tair)%fnow(ji,jj,1) )
645	! Latent Heat
646	qla_ice(ji,jj,jl) = rn_efac * MAX( 0.e0, rhoa * Ls * Cice * wndm_ice(ji,jj) &
647	& * ( 11637800. * EXP( -5897.8 / ptsu(ji,jj,jl) ) / rhoa - sf(jp_humi)%fnow(ji,jj,1) ) )
648	! Latent heat sensitivity for ice (Dqla/Dt)
649	IF( qla_ice(ji,jj,jl) > 0._wp ) THEN
650	dqla_ice(ji,jj,jl) = rn_efac * zcoef_dqla * wndm_ice(ji,jj) / ( zst2 ) * EXP( -5897.8 / ptsu(ji,jj,jl) )
651	ELSE
652	dqla_ice(ji,jj,jl) = 0._wp
653	ENDIF
654
655	! Sensible heat sensitivity (Dqsb_ice/Dtn_ice)
656	z_dqsb(ji,jj,jl) = zcoef_dqsb * wndm_ice(ji,jj)
657
658	! ----------------------------!
659	! III Total FLUXES !
660	! ----------------------------!
661	! Downward Non Solar flux
662	qns_ice (ji,jj,jl) = z_qlw (ji,jj,jl) - z_qsb (ji,jj,jl) - qla_ice (ji,jj,jl)
663	! Total non solar heat flux sensitivity for ice
664	dqns_ice(ji,jj,jl) = - ( z_dqlw(ji,jj,jl) + z_dqsb(ji,jj,jl) + dqla_ice(ji,jj,jl) )
665	END DO
666	!
667	END DO
668	!
669	END DO
670	!
671	!$OMP DO schedule(static) private(jj, ji)
672	DO jj = 1, jpj
673	DO ji = 1, jpi
674	tprecip(ji,jj) = sf(jp_prec)%fnow(ji,jj,1) * rn_pfac ! total precipitation [kg/m2/s]
675	sprecip(ji,jj) = sf(jp_snow)%fnow(ji,jj,1) * rn_pfac ! solid precipitation [kg/m2/s]
676	END DO
677	END DO
678	!$OMP END PARALLEL
679	CALL iom_put( 'snowpre', sprecip * 86400. ) ! Snow precipitation
680	CALL iom_put( 'precip' , tprecip * 86400. ) ! Total precipitation
681
682	#if defined key_lim3
683	CALL wrk_alloc( jpi,jpj, zevap, zsnw )
684
685	! --- evaporation --- !
686	z1_lsub = 1._wp / Lsub
687
688	!$OMP PARALLEL
689	!$OMP DO schedule(static) private(jl, jj, ji)
690	DO jl = 1, jpl
691	DO jj = 1, jpj
692	DO ji = 1, jpi
693	evap_ice (ji,jj,jl) = rn_efac * qla_ice (ji,jj,jl) * z1_lsub ! sublimation
694	devap_ice(ji,jj,jl) = rn_efac * dqla_ice(ji,jj,jl) * z1_lsub ! d(sublimation)/dT
695	END DO
696	END DO
697	END DO
698	!$OMP DO schedule(static) private(jj, ji)
699	DO jj = 1, jpj
700	DO ji = 1, jpi
701	zevap (ji,jj) = rn_efac * ( emp(ji,jj) + tprecip(ji,jj) ) ! evaporation over ocean
702	! --- evaporation minus precipitation --- !
703	zsnw(ji,jj) = 0._wp
704	END DO
705	END DO
706	!$OMP END PARALLEL
707	CALL lim_thd_snwblow( pfrld, zsnw ) ! snow distribution over ice after wind blowing
708
709	emp_oce(:,:) = pfrld(:,:) * zevap(:,:) - ( tprecip(:,:) - sprecip(:,:) ) - sprecip(:,:) * (1._wp - zsnw )
710	emp_ice(:,:) = SUM( a_i_b(:,:,:) * evap_ice(:,:,:), dim=3 ) - sprecip(:,:) * zsnw
711	emp_tot(:,:) = emp_oce(:,:) + emp_ice(:,:)
712
713	! --- heat flux associated with emp --- !
714	qemp_oce(:,:) = - pfrld(:,:) * zevap(:,:) * sst_m(:,:) * rcp & ! evap at sst
715	& + ( tprecip(:,:) - sprecip(:,:) ) * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp & ! liquid precip at Tair
716	& + sprecip(:,:) * ( 1._wp - zsnw ) * & ! solid precip at min(Tair,Tsnow)
717	& ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
718	qemp_ice(:,:) = sprecip(:,:) * zsnw * & ! solid precip (only)
719	& ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
720
721	! --- total solar and non solar fluxes --- !
722	qns_tot(:,:) = pfrld(:,:) * qns_oce(:,:) + SUM( a_i_b(:,:,:) * qns_ice(:,:,:), dim=3 ) + qemp_ice(:,:) + qemp_oce(:,:)
723	qsr_tot(:,:) = pfrld(:,:) * qsr_oce(:,:) + SUM( a_i_b(:,:,:) * qsr_ice(:,:,:), dim=3 )
724
725	! --- heat content of precip over ice in J/m3 (to be used in 1D-thermo)
726	! --- !
727	qprec_ice(:,:) = rhosn * ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
728
729	! --- heat content of evap over ice in W/m2 (to be used in 1D-thermo) --- !
730	!$OMP PARALLEL DO schedule(static) private(jl)
731	DO jl = 1, jpl
732	qevap_ice(:,:,jl) = 0._wp ! should be -evap_ice(:,:,jl)( ( Tice - rt0 ) cpic * tmask(:,:,1) )
733	! But we do not have Tice => consider it at 0°C => evap=0
734	END DO
735	CALL wrk_dealloc( jpi,jpj, zevap, zsnw )
736	#endif
737
738	!--------------------------------------------------------------------
739	! FRACTIONs of net shortwave radiation which is not absorbed in the
740	! thin surface layer and penetrates inside the ice cover
741	! ( Maykut and Untersteiner, 1971 ; Ebert and Curry, 1993 )
742	!
743	!$OMP PARALLEL DO schedule(static) private(jj, ji)
744	DO jj = 1, jpj
745	DO ji = 1, jpi
746	fr1_i0(ji,jj) = ( 0.18 * ( 1.0 - cldf_ice ) + 0.35 * cldf_ice )
747	fr2_i0(ji,jj) = ( 0.82 * ( 1.0 - cldf_ice ) + 0.65 * cldf_ice )
748	END DO
749	END DO
750	!
751	!
752	IF(ln_ctl) THEN
753	CALL prt_ctl(tab3d_1=qla_ice , clinfo1=' blk_ice_core: qla_ice : ', tab3d_2=z_qsb , clinfo2=' z_qsb : ', kdim=jpl)
754	CALL prt_ctl(tab3d_1=z_qlw , clinfo1=' blk_ice_core: z_qlw : ', tab3d_2=dqla_ice, clinfo2=' dqla_ice : ', kdim=jpl)
755	CALL prt_ctl(tab3d_1=z_dqsb , clinfo1=' blk_ice_core: z_dqsb : ', tab3d_2=z_dqlw , clinfo2=' z_dqlw : ', kdim=jpl)
756	CALL prt_ctl(tab3d_1=dqns_ice, clinfo1=' blk_ice_core: dqns_ice : ', tab3d_2=qsr_ice , clinfo2=' qsr_ice : ', kdim=jpl)
757	CALL prt_ctl(tab3d_1=ptsu , clinfo1=' blk_ice_core: ptsu : ', tab3d_2=qns_ice , clinfo2=' qns_ice : ', kdim=jpl)
758	CALL prt_ctl(tab2d_1=tprecip , clinfo1=' blk_ice_core: tprecip : ', tab2d_2=sprecip , clinfo2=' sprecip : ')
759	ENDIF
760
761	CALL wrk_dealloc( jpi,jpj,jpl, z_qlw, z_qsb, z_dqlw, z_dqsb )
762	!
763	IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core_flx')
764
765	END SUBROUTINE blk_ice_core_flx
766	#endif
767
768	SUBROUTINE turb_core_2z( zt, zu, sst, T_zt, q_sat, q_zt, dU, &
769	& Cd, Ch, Ce , T_zu, q_zu )
770	!!----------------------------------------------------------------------
771	!! * ROUTINE turb_core *
772	!!
773	!! ** Purpose : Computes turbulent transfert coefficients of surface
774	!! fluxes according to Large & Yeager (2004) and Large & Yeager (2008)
775	!! If relevant (zt /= zu), adjust temperature and humidity from height zt to zu
776	!!
777	!! ** Method : Monin Obukhov Similarity Theory
778	!! + Large & Yeager (2004,2008) closure: CD_n10 = f(U_n10)
779	!!
780	!! ** References : Large & Yeager, 2004 / Large & Yeager, 2008
781	!!
782	!! ** Last update: Laurent Brodeau, June 2014:
783	!! - handles both cases zt=zu and zt/=zu
784	!! - optimized: less 2D arrays allocated and less operations
785	!! - better first guess of stability by checking air-sea difference of virtual temperature
786	!! rather than temperature difference only...
787	!! - added function "cd_neutral_10m" that uses the improved parametrization of
788	!! Large & Yeager 2008. Drag-coefficient reduction for Cyclone conditions!
789	!! - using code-wide physical constants defined into "phycst.mod" rather than redifining them
790	!! => 'vkarmn' and 'grav'
791	!!----------------------------------------------------------------------
792	REAL(wp), INTENT(in ) :: zt ! height for T_zt and q_zt [m]
793	REAL(wp), INTENT(in ) :: zu ! height for dU [m]
794	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: sst ! sea surface temperature [Kelvin]
795	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: T_zt ! potential air temperature [Kelvin]
796	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_sat ! sea surface specific humidity [kg/kg]
797	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_zt ! specific air humidity [kg/kg]
798	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: dU ! relative wind module at zu [m/s]
799	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Cd ! transfer coefficient for momentum (tau)
800	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ch ! transfer coefficient for sensible heat (Q_sens)
801	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ce ! transfert coefficient for evaporation (Q_lat)
802	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: T_zu ! air temp. shifted at zu [K]
803	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: q_zu ! spec. hum. shifted at zu [kg/kg]
804	!
805	INTEGER :: j_itt
806	INTEGER :: ji, jj ! dummy loop indices
807	INTEGER , PARAMETER :: nb_itt = 5 ! number of itterations
808	LOGICAL :: l_zt_equal_zu = .FALSE. ! if q and t are given at different height than U
809	!
810	REAL(wp), DIMENSION(:,:), POINTER :: U_zu ! relative wind at zu [m/s]
811	REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient
812	REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient
813	REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10
814	REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd
815	REAL(wp), DIMENSION(:,:), POINTER :: zeta_u ! stability parameter at height zu
816	REAL(wp), DIMENSION(:,:), POINTER :: zeta_t ! stability parameter at height zt
817	REAL(wp), DIMENSION(:,:), POINTER :: zpsi_h_u, zpsi_m_u
818	REAL(wp), DIMENSION(:,:), POINTER :: ztmp0, ztmp1, ztmp2
819	REAL(wp), DIMENSION(:,:), POINTER :: stab ! 1st stability test integer
820	!!----------------------------------------------------------------------
821
822	IF( nn_timing == 1 ) CALL timing_start('turb_core_2z')
823
824	CALL wrk_alloc( jpi,jpj, U_zu, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd )
825	CALL wrk_alloc( jpi,jpj, zeta_u, stab )
826	CALL wrk_alloc( jpi,jpj, zpsi_h_u, zpsi_m_u, ztmp0, ztmp1, ztmp2 )
827
828	l_zt_equal_zu = .FALSE.
829	IF( ABS(zu - zt) < 0.01 ) l_zt_equal_zu = .TRUE. ! testing "zu == zt" is risky with double precision
830
831	IF( .NOT. l_zt_equal_zu ) CALL wrk_alloc( jpi,jpj, zeta_t )
832
833	U_zu = MAX( 0.5 , dU ) ! relative wind speed at zu (normally 10m), we don't want to fall under 0.5 m/s
834
835	!! First guess of stability:
836	ztmp0 = T_zt(1. + 0.608q_zt) - sst(1. + 0.608q_sat) ! air-sea difference of virtual pot. temp. at zt
837	stab = 0.5 + sign(0.5,ztmp0) ! stab = 1 if dTv > 0 => STABLE, 0 if unstable
838
839	!! Neutral coefficients at 10m:
840	IF( ln_cdgw ) THEN ! wave drag case
841	!$OMP PARALLEL DO schedule(static) private(jj, ji)
842	DO jj = 1, jpj
843	DO ji = 1, jpi
844	cdn_wave(ji,jj) = cdn_wave(ji,jj) + rsmall * ( 1._wp - tmask(ji,jj,1) )
845	ztmp0 (ji,jj) = cdn_wave(ji,jj)
846	END DO
847	END DO
848	ELSE
849	ztmp0 = cd_neutral_10m( U_zu )
850	ENDIF
851	sqrt_Cd_n10 = SQRT( ztmp0 )
852	Ce_n10 = 1.e-3( 34.6 sqrt_Cd_n10 )
853	Ch_n10 = 1.e-3sqrt_Cd_n10(18.stab + 32.7(1. - stab))
854
855	!! Initializing transf. coeff. with their first guess neutral equivalents :
856	Cd = ztmp0 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt_Cd_n10
857
858	!! Initializing values at z_u with z_t values:
859	T_zu = T_zt ; q_zu = q_zt
860
861	!! * Now starting iteration loop
862	DO j_itt=1, nb_itt
863	!
864	ztmp1 = T_zu - sst ! Updating air/sea differences
865	ztmp2 = q_zu - q_sat
866
867	! Updating turbulent scales : (L&Y 2004 eq. (7))
868	ztmp1 = Ch/sqrt_Cdztmp1 ! theta
869	ztmp2 = Ce/sqrt_Cdztmp2 ! q
870
871	ztmp0 = T_zu(1. + 0.608q_zu) ! virtual potential temperature at zu
872
873	! Estimate the inverse of Monin-Obukov length (1/L) at height zu:
874	ztmp0 = (vkarmngrav/ztmp0(ztmp1(1.+0.608q_zu) + 0.608T_zuztmp2)) / (CdU_zuU_zu)
875	! ( CdU_zuU_zu is U*^2 at zu)
876
877	!! Stability parameters :
878	zeta_u = zu*ztmp0 ; zeta_u = sign( min(abs(zeta_u),10.0), zeta_u )
879	zpsi_h_u = psi_h( zeta_u )
880	zpsi_m_u = psi_m( zeta_u )
881
882	!! Shifting temperature and humidity at zu (L&Y 2004 eq. (9b-9c))
883	IF ( .NOT. l_zt_equal_zu ) THEN
884	zeta_t = zt*ztmp0 ; zeta_t = sign( min(abs(zeta_t),10.0), zeta_t )
885	stab = LOG(zu/zt) - zpsi_h_u + psi_h(zeta_t) ! stab just used as temp array!!!
886	T_zu = T_zt + ztmp1/vkarmnstab ! ztmp1 is still theta
887	q_zu = q_zt + ztmp2/vkarmnstab ! ztmp2 is still q
888	q_zu = max(0., q_zu)
889	END IF
890
891	IF( ln_cdgw ) THEN ! surface wave case
892	sqrt_Cd = vkarmn / ( vkarmn / sqrt_Cd_n10 - zpsi_m_u )
893	Cd = sqrt_Cd * sqrt_Cd
894	ELSE
895	! Update neutral wind speed at 10m and neutral Cd at 10m (L&Y 2004 eq. 9a)...
896	! In very rare low-wind conditions, the old way of estimating the
897	! neutral wind speed at 10m leads to a negative value that causes the code
898	! to crash. To prevent this a threshold of 0.25m/s is imposed.
899	ztmp0 = MAX( 0.25 , U_zu/(1. + sqrt_Cd_n10/vkarmn*(LOG(zu/10.) - zpsi_m_u)) ) ! U_n10
900	ztmp0 = cd_neutral_10m(ztmp0) ! Cd_n10
901	sqrt_Cd_n10 = sqrt(ztmp0)
902
903	Ce_n10 = 1.e-3 * (34.6 * sqrt_Cd_n10) ! L&Y 2004 eq. (6b)
904	stab = 0.5 + sign(0.5,zeta_u) ! update stability
905	Ch_n10 = 1.e-3sqrt_Cd_n10(18.stab + 32.7(1. - stab)) ! L&Y 2004 eq. (6c-6d)
906
907	!! Update of transfer coefficients:
908	ztmp1 = 1. + sqrt_Cd_n10/vkarmn*(LOG(zu/10.) - zpsi_m_u) ! L&Y 2004 eq. (10a)
909	Cd = ztmp0 / ( ztmp1*ztmp1 )
910	sqrt_Cd = SQRT( Cd )
911	ENDIF
912	!
913	ztmp0 = (LOG(zu/10.) - zpsi_h_u) / vkarmn / sqrt_Cd_n10
914	ztmp2 = sqrt_Cd / sqrt_Cd_n10
915	ztmp1 = 1. + Ch_n10*ztmp0
916	Ch = Ch_n10*ztmp2 / ztmp1 ! L&Y 2004 eq. (10b)
917	!
918	ztmp1 = 1. + Ce_n10*ztmp0
919	Ce = Ce_n10*ztmp2 / ztmp1 ! L&Y 2004 eq. (10c)
920	!
921	END DO
922
923	CALL wrk_dealloc( jpi,jpj, U_zu, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd )
924	CALL wrk_dealloc( jpi,jpj, zeta_u, stab )
925	CALL wrk_dealloc( jpi,jpj, zpsi_h_u, zpsi_m_u, ztmp0, ztmp1, ztmp2 )
926
927	IF( .NOT. l_zt_equal_zu ) CALL wrk_dealloc( jpi,jpj, zeta_t )
928
929	IF( nn_timing == 1 ) CALL timing_stop('turb_core_2z')
930	!
931	END SUBROUTINE turb_core_2z
932
933
934	FUNCTION cd_neutral_10m( zw10 )
935	!!----------------------------------------------------------------------
936	!! Estimate of the neutral drag coefficient at 10m as a function
937	!! of neutral wind speed at 10m
938	!!
939	!! Origin: Large & Yeager 2008 eq.(11a) and eq.(11b)
940	!!
941	!! Author: L. Brodeau, june 2014
942	!!----------------------------------------------------------------------
943	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zw10 ! scalar wind speed at 10m (m/s)
944	REAL(wp), DIMENSION(jpi,jpj) :: cd_neutral_10m
945	!
946	REAL(wp), DIMENSION(:,:), POINTER :: rgt33
947	!!----------------------------------------------------------------------
948	!
949	CALL wrk_alloc( jpi,jpj, rgt33 )
950	!
951	!! When wind speed > 33 m/s => Cyclone conditions => special treatment
952	rgt33 = 0.5_wp + SIGN( 0.5_wp, (zw10 - 33._wp) ) ! If zw10 < 33. => 0, else => 1
953	cd_neutral_10m = 1.e-3 * ( &
954	& (1._wp - rgt33)( 2.7_wp/zw10 + 0.142_wp + zw10/13.09_wp - 3.14807E-10zw10**6) & ! zw10< 33.
955	& + rgt33 * 2.34 ) ! zw10 >= 33.
956	!
957	CALL wrk_dealloc( jpi,jpj, rgt33)
958	!
959	END FUNCTION cd_neutral_10m
960
961
962	FUNCTION psi_m(pta) !! Psis, L&Y 2004 eq. (8c), (8d), (8e)
963	!-------------------------------------------------------------------------------
964	! universal profile stability function for momentum
965	!-------------------------------------------------------------------------------
966	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pta
967	!
968	REAL(wp), DIMENSION(jpi,jpj) :: psi_m
969	REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit
970	!-------------------------------------------------------------------------------
971	!
972	CALL wrk_alloc( jpi,jpj, X2, X, stabit )
973	!
974	X2 = SQRT( ABS( 1. - 16.*pta ) ) ; X2 = MAX( X2 , 1. ) ; X = SQRT( X2 )
975	stabit = 0.5 + SIGN( 0.5 , pta )
976	psi_m = -5.ptastabit & ! Stable
977	& + (1. - stabit)(2.LOG((1. + X)0.5) + LOG((1. + X2)0.5) - 2.ATAN(X) + rpi0.5) ! Unstable
978	!
979	CALL wrk_dealloc( jpi,jpj, X2, X, stabit )
980	!
981	END FUNCTION psi_m
982
983
984	FUNCTION psi_h( pta ) !! Psis, L&Y 2004 eq. (8c), (8d), (8e)
985	!-------------------------------------------------------------------------------
986	! universal profile stability function for temperature and humidity
987	!-------------------------------------------------------------------------------
988	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pta
989	!
990	REAL(wp), DIMENSION(jpi,jpj) :: psi_h
991	REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit
992	!-------------------------------------------------------------------------------
993	!
994	CALL wrk_alloc( jpi,jpj, X2, X, stabit )
995	!
996	X2 = SQRT( ABS( 1. - 16.*pta ) ) ; X2 = MAX( X2 , 1. ) ; X = SQRT( X2 )
997	stabit = 0.5 + SIGN( 0.5 , pta )
998	psi_h = -5.ptastabit & ! Stable
999	& + (1. - stabit)(2.LOG( (1. + X2)*0.5 )) ! Unstable
1000	!
1001	CALL wrk_dealloc( jpi,jpj, X2, X, stabit )
1002	!
1003	END FUNCTION psi_h
1004
1005	!!======================================================================
1006	END MODULE sbcblk_core

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