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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 @ 7525

Last change on this file since 7525 was 7525, checked in by mocavero, 7 years ago
changes after review
Property svn:keywords set to `Id`
File size: 54.2 KB

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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	!$OMP PARALLEL DO schedule(static) private(jj, ji)
280	DO jj = 1, jpj
281	DO ji = 1, jpi
282	zst(ji,jj) = pst(ji,jj) + rt0 ! convert SST from Celcius to Kelvin (and set minimum value far above 0 K)
283
284	! ... components ( U10m - U_oce ) at T-point (unmasked)
285	zwnd_i(ji,jj) = 0.e0
286	zwnd_j(ji,jj) = 0.e0
287	END DO
288	END DO
289
290	! ----------------------------------------------------------------------------- !
291	! 0 Wind components and module at T-point relative to the moving ocean !
292	! ----------------------------------------------------------------------------- !
293
294	#if defined key_cyclone
295	CALL wnd_cyc( kt, zwnd_i, zwnd_j ) ! add analytical tropical cyclone (Vincent et al. JGR 2012)
296	!$OMP PARALLEL DO schedule(static) private(jj, ji)
297	DO jj = 2, jpjm1
298	DO ji = fs_2, fs_jpim1 ! vect. opt.
299	sf(jp_wndi)%fnow(ji,jj,1) = sf(jp_wndi)%fnow(ji,jj,1) + zwnd_i(ji,jj)
300	sf(jp_wndj)%fnow(ji,jj,1) = sf(jp_wndj)%fnow(ji,jj,1) + zwnd_j(ji,jj)
301	END DO
302	END DO
303	#endif
304	!$OMP PARALLEL DO schedule(static) private(jj, ji)
305	DO jj = 2, jpjm1
306	DO ji = fs_2, fs_jpim1 ! vect. opt.
307	zwnd_i(ji,jj) = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pu(ji-1,jj ) + pu(ji,jj) ) )
308	zwnd_j(ji,jj) = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pv(ji ,jj-1) + pv(ji,jj) ) )
309	END DO
310	END DO
311	CALL lbc_lnk( zwnd_i(:,:) , 'T', -1. )
312	CALL lbc_lnk( zwnd_j(:,:) , 'T', -1. )
313	! ... scalar wind ( = \| U10m - U_oce \| ) at T-point (masked)
314	!$OMP PARALLEL DO schedule(static) private(jj, ji)
315	DO jj = 1, jpj
316	DO ji = 1, jpi
317	wndm(ji,jj) = SQRT( zwnd_i(ji,jj) * zwnd_i(ji,jj) &
318	& + zwnd_j(ji,jj) * zwnd_j(ji,jj) ) * tmask(ji,jj,1)
319
320	END DO
321	END DO
322	! ----------------------------------------------------------------------------- !
323	! I Radiative FLUXES !
324	! ----------------------------------------------------------------------------- !
325
326	! ocean albedo assumed to be constant + modify now Qsr to include the diurnal cycle ! Short Wave
327	zztmp = 1. - albo
328	IF( ln_dm2dc ) THEN ; qsr(:,:) = zztmp * sbc_dcy( sf(jp_qsr)%fnow(:,:,1) ) * tmask(:,:,1)
329	ELSE ; qsr(:,:) = zztmp * sf(jp_qsr)%fnow(:,:,1) * tmask(:,:,1)
330	ENDIF
331
332	!$OMP PARALLEL
333	!$OMP 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	END DO
338	END DO
339	!OMP END DO NOWAIT
340	! ----------------------------------------------------------------------------- !
341	! II Turbulent FLUXES !
342	! ----------------------------------------------------------------------------- !
343
344	!$OMP DO schedule(static) private(jj, ji)
345	DO jj = 1, jpj
346	DO ji = 1, jpi
347	! ... specific humidity at SST and IST
348	zqsatw(ji,jj) = zcoef_qsatw * EXP( -5107.4 / zst(ji,jj) )
349	END DO
350	END DO
351	!$OMP END PARALLEL
352
353	! ... NCAR Bulk formulae, computation of Cd, Ch, Ce at T-point :
354	CALL turb_core_2z( rn_zqt, rn_zu, zst, sf(jp_tair)%fnow, zqsatw, sf(jp_humi)%fnow, wndm, &
355	& Cd, Ch, Ce, zt_zu, zq_zu )
356
357	! ... tau module, i and j component
358	!$OMP PARALLEL DO schedule(static) private(jj, ji,zztmp)
359	DO jj = 1, jpj
360	DO ji = 1, jpi
361	zztmp = rhoa * wndm(ji,jj) * Cd(ji,jj)
362	taum (ji,jj) = zztmp * wndm (ji,jj)
363	zwnd_i(ji,jj) = zztmp * zwnd_i(ji,jj)
364	zwnd_j(ji,jj) = zztmp * zwnd_j(ji,jj)
365	END DO
366	END DO
367
368	! ... add the HF tau contribution to the wind stress module?
369	IF( lhftau ) THEN
370	!$OMP PARALLEL DO schedule(static) private(jj, ji)
371	DO jj = 1, jpj
372	DO ji = 1, jpi
373	taum(ji,jj) = taum(ji,jj) + sf(jp_tdif)%fnow(ji,jj,1)
374	END DO
375	END DO
376	ENDIF
377	CALL iom_put( "taum_oce", taum ) ! output wind stress module
378
379	! ... utau, vtau at U- and V_points, resp.
380	! Note the use of 0.5*(2-umask) in order to unmask the stress along coastlines
381	! Note the use of MAX(tmask(i,j),tmask(i+1,j) is to mask tau over ice shelves
382	!$OMP PARALLEL DO schedule(static) private(jj, ji)
383	DO jj = 1, jpjm1
384	DO ji = 1, fs_jpim1
385	utau(ji,jj) = 0.5 * ( 2. - umask(ji,jj,1) ) * ( zwnd_i(ji,jj) + zwnd_i(ji+1,jj ) ) &
386	& * MAX(tmask(ji,jj,1),tmask(ji+1,jj,1))
387	vtau(ji,jj) = 0.5 * ( 2. - vmask(ji,jj,1) ) * ( zwnd_j(ji,jj) + zwnd_j(ji ,jj+1) ) &
388	& * MAX(tmask(ji,jj,1),tmask(ji,jj+1,1))
389	END DO
390	END DO
391	CALL lbc_lnk( utau(:,:), 'U', -1. )
392	CALL lbc_lnk( vtau(:,:), 'V', -1. )
393
394
395	! Turbulent fluxes over ocean
396	! -----------------------------
397	IF( ABS( rn_zu - rn_zqt) < 0.01_wp ) THEN
398	!$OMP PARALLEL DO schedule(static) private(jj, ji)
399	DO jj = 1, jpj
400	DO ji = 1, jpi
401	!! q_air and t_air are (or "are almost") given at 10m (wind reference height)
402	zevap(ji,jj) = rn_efacMAX( 0._wp, rhoaCe(ji,jj)( zqsatw(ji,jj) - sf(jp_humi)%fnow(ji,jj,1) )wndm(ji,jj) ) ! Evaporation
403	zqsb (ji,jj) = cparhoaCh(ji,jj)( zst (ji,jj) - sf(jp_tair)%fnow(ji,jj,1) )wndm(ji,jj) ! Sensible Heat
404	END DO
405	END DO
406	ELSE
407	!$OMP PARALLEL DO schedule(static) private(jj, ji)
408	DO jj = 1, jpj
409	DO ji = 1, jpi
410	!! q_air and t_air are not given at 10m (wind reference height)
411	! Values of temp. and hum. adjusted to height of wind during bulk algorithm iteration must be used!!!
412	zevap(ji,jj) = rn_efacMAX( 0._wp, rhoaCe(ji,jj)( zqsatw(ji,jj) - zq_zu(ji,jj) )wndm(ji,jj) ) ! Evaporation
413	zqsb (ji,jj) = cparhoaCh(ji,jj)( zst (ji,jj) - zt_zu(ji,jj) )wndm(ji,jj) ! Sensible Heat
414	END DO
415	END DO
416	ENDIF
417	!$OMP PARALLEL DO schedule(static) private(jj, ji)
418	DO jj = 1, jpj
419	DO ji = 1, jpi
420	zqla (ji,jj) = Lv * zevap(ji,jj) ! Latent Heat
421	END DO
422	END DO
423	IF(ln_ctl) THEN
424	CALL prt_ctl( tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=Ce , clinfo2=' Ce : ' )
425	CALL prt_ctl( tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=Ch , clinfo2=' Ch : ' )
426	CALL prt_ctl( tab2d_1=zqlw , clinfo1=' blk_oce_core: zqlw : ', tab2d_2=qsr, clinfo2=' qsr : ' )
427	CALL prt_ctl( tab2d_1=zqsatw, clinfo1=' blk_oce_core: zqsatw : ', tab2d_2=zst, clinfo2=' zst : ' )
428	CALL prt_ctl( tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, &
429	& tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask )
430	CALL prt_ctl( tab2d_1=wndm , clinfo1=' blk_oce_core: wndm : ')
431	CALL prt_ctl( tab2d_1=zst , clinfo1=' blk_oce_core: zst : ')
432	ENDIF
433
434	! ----------------------------------------------------------------------------- !
435	! III Total FLUXES !
436	! ----------------------------------------------------------------------------- !
437	!
438	!$OMP PARALLEL DO schedule(static) private(jj, ji)
439	DO jj = 1, jpj
440	DO ji = 1, jpi
441	emp (ji,jj) = ( zevap(ji,jj) & ! mass flux (evap. - precip.)
442	& - sf(jp_prec)%fnow(ji,jj,1) * rn_pfac ) * tmask(ji,jj,1)
443	!
444	qns(ji,jj) = zqlw(ji,jj) - zqsb(ji,jj) - zqla(ji,jj) & ! Downward Non Solar
445	& - sf(jp_snow)%fnow(ji,jj,1) * rn_pfac * lfus & ! remove latent melting heat for solid precip
446	& - zevap(ji,jj) * pst(ji,jj) * rcp & ! remove evap heat content at SST
447	& + ( sf(jp_prec)%fnow(ji,jj,1) - sf(jp_snow)%fnow(ji,jj,1) ) * rn_pfac & ! add liquid precip heat content at Tair
448	& * ( sf(jp_tair)%fnow(ji,jj,1) - rt0 ) * rcp &
449	& + sf(jp_snow)%fnow(ji,jj,1) * rn_pfac & ! add solid precip heat content at min(Tair,Tsnow)
450	& * ( MIN( sf(jp_tair)%fnow(ji,jj,1), rt0_snow ) - rt0 ) * cpic * tmask(ji,jj,1)
451	END DO
452	END DO
453	!
454	#if defined key_lim3
455	!$OMP PARALLEL DO schedule(static) private(jj, ji)
456	DO jj = 1, jpj
457	DO ji = 1, jpi
458	qns_oce(ji,jj) = zqlw(ji,jj) - zqsb(ji,jj) - zqla(ji,jj) ! non solar without emp (only needed by LIM3)
459	qsr_oce(ji,jj) = qsr(ji,jj)
460	END DO
461	END DO
462	#endif
463	!
464	IF ( nn_ice == 0 ) THEN
465	CALL iom_put( "qlw_oce" , zqlw ) ! output downward longwave heat over the ocean
466	CALL iom_put( "qsb_oce" , - zqsb ) ! output downward sensible heat over the ocean
467	CALL iom_put( "qla_oce" , - zqla ) ! output downward latent heat over the ocean
468	CALL iom_put( "qemp_oce", qns-zqlw+zqsb+zqla ) ! output downward heat content of E-P over the ocean
469	CALL iom_put( "qns_oce" , qns ) ! output downward non solar heat over the ocean
470	CALL iom_put( "qsr_oce" , qsr ) ! output downward solar heat over the ocean
471	CALL iom_put( "qt_oce" , qns+qsr ) ! output total downward heat over the ocean
472	!$OMP PARALLEL DO schedule(static) private(jj, ji)
473	DO jj = 1, jpj
474	DO ji = 1, jpi
475	tprecip(ji,jj) = sf(jp_prec)%fnow(ji,jj,1) * rn_pfac ! output total precipitation [kg/m2/s]
476	sprecip(ji,jj) = sf(jp_snow)%fnow(ji,jj,1) * rn_pfac ! output solid precipitation [kg/m2/s]
477	END DO
478	END DO
479	CALL iom_put( 'snowpre', sprecip * 86400. ) ! Snow
480	CALL iom_put( 'precip' , tprecip * 86400. ) ! Total precipitation
481	ENDIF
482	!
483	IF(ln_ctl) THEN
484	CALL prt_ctl(tab2d_1=zqsb , clinfo1=' blk_oce_core: zqsb : ', tab2d_2=zqlw , clinfo2=' zqlw : ')
485	CALL prt_ctl(tab2d_1=zqla , clinfo1=' blk_oce_core: zqla : ', tab2d_2=qsr , clinfo2=' qsr : ')
486	CALL prt_ctl(tab2d_1=pst , clinfo1=' blk_oce_core: pst : ', tab2d_2=emp , clinfo2=' emp : ')
487	CALL prt_ctl(tab2d_1=utau , clinfo1=' blk_oce_core: utau : ', mask1=umask, &
488	& tab2d_2=vtau , clinfo2= ' vtau : ' , mask2=vmask )
489	ENDIF
490	!
491	CALL wrk_dealloc( jpi,jpj, zwnd_i, zwnd_j, zqsatw, zqlw, zqsb, zqla, zevap )
492	CALL wrk_dealloc( jpi,jpj, Cd, Ch, Ce, zst, zt_zu, zq_zu )
493	!
494	IF( nn_timing == 1 ) CALL timing_stop('blk_oce_core')
495	!
496	END SUBROUTINE blk_oce_core
497
498
499	#if defined key_lim2 \|\| defined key_lim3
500	SUBROUTINE blk_ice_core_tau
501	!!---------------------------------------------------------------------
502	!! * ROUTINE blk_ice_core_tau *
503	!!
504	!! ** Purpose : provide the surface boundary condition over sea-ice
505	!!
506	!! ** Method : compute momentum using CORE bulk
507	!! formulea, ice variables and read atmospheric fields.
508	!! NB: ice drag coefficient is assumed to be a constant
509	!!---------------------------------------------------------------------
510	INTEGER :: ji, jj ! dummy loop indices
511	REAL(wp) :: zcoef_wnorm, zcoef_wnorm2
512	REAL(wp) :: zwnorm_f, zwndi_f , zwndj_f ! relative wind module and components at F-point
513	REAL(wp) :: zwndi_t , zwndj_t ! relative wind components at T-point
514	!!---------------------------------------------------------------------
515	!
516	IF( nn_timing == 1 ) CALL timing_start('blk_ice_core_tau')
517	!
518	! local scalars ( place there for vector optimisation purposes)
519	zcoef_wnorm = rhoa * Cice
520	zcoef_wnorm2 = rhoa * Cice * 0.5
521
522	!!gm brutal....
523	!$OMP PARALLEL DO schedule(static) private(jj, ji)
524	DO jj = 1, jpj
525	DO ji = 1, jpi
526	utau_ice (ji,jj) = 0._wp
527	vtau_ice (ji,jj) = 0._wp
528	wndm_ice (ji,jj) = 0._wp
529	END DO
530	END DO
531	!!gm end
532
533	! ----------------------------------------------------------------------------- !
534	! Wind components and module relative to the moving ocean ( U10m - U_ice ) !
535	! ----------------------------------------------------------------------------- !
536	SELECT CASE( cp_ice_msh )
537	CASE( 'I' ) ! B-grid ice dynamics : I-point (i.e. F-point with sea-ice indexation)
538	! and scalar wind at T-point ( = \| U10m - U_ice \| ) (masked)
539	!$OMP PARALLEL DO schedule(static) private(jj,ji,zwndi_f,zwndj_f,zwnorm_f,zwndi_t,zwndj_t)
540	DO jj = 2, jpjm1
541	DO ji = 2, jpim1 ! B grid : NO vector opt
542	! ... scalar wind at I-point (fld being at T-point)
543	zwndi_f = 0.25 * ( sf(jp_wndi)%fnow(ji-1,jj ,1) + sf(jp_wndi)%fnow(ji ,jj ,1) &
544	& + sf(jp_wndi)%fnow(ji-1,jj-1,1) + sf(jp_wndi)%fnow(ji ,jj-1,1) ) - rn_vfac * u_ice(ji,jj)
545	zwndj_f = 0.25 * ( sf(jp_wndj)%fnow(ji-1,jj ,1) + sf(jp_wndj)%fnow(ji ,jj ,1) &
546	& + sf(jp_wndj)%fnow(ji-1,jj-1,1) + sf(jp_wndj)%fnow(ji ,jj-1,1) ) - rn_vfac * v_ice(ji,jj)
547	zwnorm_f = zcoef_wnorm * SQRT( zwndi_f * zwndi_f + zwndj_f * zwndj_f )
548	! ... ice stress at I-point
549	utau_ice(ji,jj) = zwnorm_f * zwndi_f
550	vtau_ice(ji,jj) = zwnorm_f * zwndj_f
551	! ... scalar wind at T-point (fld being at T-point)
552	zwndi_t = sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( u_ice(ji,jj+1) + u_ice(ji+1,jj+1) &
553	& + u_ice(ji,jj ) + u_ice(ji+1,jj ) )
554	zwndj_t = sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( v_ice(ji,jj+1) + v_ice(ji+1,jj+1) &
555	& + v_ice(ji,jj ) + v_ice(ji+1,jj ) )
556	wndm_ice(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1)
557	END DO
558	END DO
559	CALL lbc_lnk( utau_ice, 'I', -1. )
560	CALL lbc_lnk( vtau_ice, 'I', -1. )
561	CALL lbc_lnk( wndm_ice, 'T', 1. )
562	!
563	CASE( 'C' ) ! C-grid ice dynamics : U & V-points (same as ocean)
564	!$OMP PARALLEL
565	!$OMP DO schedule(static) private(jj,ji,zwndi_t,zwndj_t)
566	DO jj = 2, jpj
567	DO ji = fs_2, jpi ! vect. opt.
568	zwndi_t = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( u_ice(ji-1,jj ) + u_ice(ji,jj) ) )
569	zwndj_t = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( v_ice(ji ,jj-1) + v_ice(ji,jj) ) )
570	wndm_ice(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1)
571	END DO
572	END DO
573	!$OMP DO schedule(static) private(jj,ji)
574	DO jj = 2, jpjm1
575	DO ji = fs_2, fs_jpim1 ! vect. opt.
576	utau_ice(ji,jj) = zcoef_wnorm2 * ( wndm_ice(ji+1,jj ) + wndm_ice(ji,jj) ) &
577	& * ( 0.5 * (sf(jp_wndi)%fnow(ji+1,jj,1) + sf(jp_wndi)%fnow(ji,jj,1) ) - rn_vfac * u_ice(ji,jj) )
578	vtau_ice(ji,jj) = zcoef_wnorm2 * ( wndm_ice(ji,jj+1 ) + wndm_ice(ji,jj) ) &
579	& * ( 0.5 * (sf(jp_wndj)%fnow(ji,jj+1,1) + sf(jp_wndj)%fnow(ji,jj,1) ) - rn_vfac * v_ice(ji,jj) )
580	END DO
581	END DO
582	!$OMP END PARALLEL
583	CALL lbc_lnk( utau_ice, 'U', -1. )
584	CALL lbc_lnk( vtau_ice, 'V', -1. )
585	CALL lbc_lnk( wndm_ice, 'T', 1. )
586	!
587	END SELECT
588
589	IF(ln_ctl) THEN
590	CALL prt_ctl(tab2d_1=utau_ice , clinfo1=' blk_ice_core: utau_ice : ', tab2d_2=vtau_ice , clinfo2=' vtau_ice : ')
591	CALL prt_ctl(tab2d_1=wndm_ice , clinfo1=' blk_ice_core: wndm_ice : ')
592	ENDIF
593
594	IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core_tau')
595
596	END SUBROUTINE blk_ice_core_tau
597
598
599	SUBROUTINE blk_ice_core_flx( ptsu, palb )
600	!!---------------------------------------------------------------------
601	!! * ROUTINE blk_ice_core_flx *
602	!!
603	!! ** Purpose : provide the surface boundary condition over sea-ice
604	!!
605	!! ** Method : compute heat and freshwater exchanged
606	!! between atmosphere and sea-ice using CORE bulk
607	!! formulea, ice variables and read atmmospheric fields.
608	!!
609	!! caution : the net upward water flux has with mm/day unit
610	!!---------------------------------------------------------------------
611	REAL(wp), DIMENSION(:,:,:), INTENT(in) :: ptsu ! sea ice surface temperature
612	REAL(wp), DIMENSION(:,:,:), INTENT(in) :: palb ! ice albedo (all skies)
613	!!
614	INTEGER :: ji, jj, jl ! dummy loop indices
615	REAL(wp) :: zst2, zst3
616	REAL(wp) :: zcoef_dqlw, zcoef_dqla, zcoef_dqsb
617	REAL(wp) :: zztmp, z1_lsub, ztmp1, ztmp2 ! temporary variable
618	!!
619	REAL(wp), DIMENSION(:,:,:), POINTER :: z_qlw ! long wave heat flux over ice
620	REAL(wp), DIMENSION(:,:,:), POINTER :: z_qsb ! sensible heat flux over ice
621	REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqlw ! long wave heat sensitivity over ice
622	REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqsb ! sensible heat sensitivity over ice
623	REAL(wp), DIMENSION(:,:) , POINTER :: zevap, zsnw ! evaporation and snw distribution after wind blowing (LIM3)
624	!!---------------------------------------------------------------------
625	!
626	IF( nn_timing == 1 ) CALL timing_start('blk_ice_core_flx')
627	!
628	CALL wrk_alloc( jpi,jpj,jpl, z_qlw, z_qsb, z_dqlw, z_dqsb )
629
630	! local scalars ( place there for vector optimisation purposes)
631	zcoef_dqlw = 4.0 * 0.95 * Stef
632	zcoef_dqla = -Ls * Cice * 11637800. * (-5897.8)
633	zcoef_dqsb = rhoa * cpa * Cice
634
635	zztmp = 1. / ( 1. - albo )
636	! ! ========================== !
637	!$OMP PARALLEL
638	!$OMP DO schedule(static) private(jl,jj,ji,zst2,zst3)
639	DO jl = 1, jpl ! Loop over ice categories !
640	! ! ========================== !
641	DO jj = 1 , jpj
642	DO ji = 1, jpi
643	! ----------------------------!
644	! I Radiative FLUXES !
645	! ----------------------------!
646	zst2 = ptsu(ji,jj,jl) * ptsu(ji,jj,jl)
647	zst3 = ptsu(ji,jj,jl) * zst2
648	! Short Wave (sw)
649	qsr_ice(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr(ji,jj)
650	! Long Wave (lw)
651	z_qlw(ji,jj,jl) = 0.95 * ( sf(jp_qlw)%fnow(ji,jj,1) - Stef * ptsu(ji,jj,jl) * zst3 ) * tmask(ji,jj,1)
652	! lw sensitivity
653	z_dqlw(ji,jj,jl) = zcoef_dqlw * zst3
654
655	! ----------------------------!
656	! II Turbulent FLUXES !
657	! ----------------------------!
658
659	! ... turbulent heat fluxes
660	! Sensible Heat
661	z_qsb(ji,jj,jl) = rhoa * cpa * Cice * wndm_ice(ji,jj) * ( ptsu(ji,jj,jl) - sf(jp_tair)%fnow(ji,jj,1) )
662	! Latent Heat
663	qla_ice(ji,jj,jl) = rn_efac * MAX( 0.e0, rhoa * Ls * Cice * wndm_ice(ji,jj) &
664	& * ( 11637800. * EXP( -5897.8 / ptsu(ji,jj,jl) ) / rhoa - sf(jp_humi)%fnow(ji,jj,1) ) )
665	! Latent heat sensitivity for ice (Dqla/Dt)
666	IF( qla_ice(ji,jj,jl) > 0._wp ) THEN
667	dqla_ice(ji,jj,jl) = rn_efac * zcoef_dqla * wndm_ice(ji,jj) / ( zst2 ) * EXP( -5897.8 / ptsu(ji,jj,jl) )
668	ELSE
669	dqla_ice(ji,jj,jl) = 0._wp
670	ENDIF
671
672	! Sensible heat sensitivity (Dqsb_ice/Dtn_ice)
673	z_dqsb(ji,jj,jl) = zcoef_dqsb * wndm_ice(ji,jj)
674
675	! ----------------------------!
676	! III Total FLUXES !
677	! ----------------------------!
678	! Downward Non Solar flux
679	qns_ice (ji,jj,jl) = z_qlw (ji,jj,jl) - z_qsb (ji,jj,jl) - qla_ice (ji,jj,jl)
680	! Total non solar heat flux sensitivity for ice
681	dqns_ice(ji,jj,jl) = - ( z_dqlw(ji,jj,jl) + z_dqsb(ji,jj,jl) + dqla_ice(ji,jj,jl) )
682	END DO
683	!
684	END DO
685	!
686	END DO
687	!
688	!$OMP DO schedule(static) private(jj, ji)
689	DO jj = 1, jpj
690	DO ji = 1, jpi
691	tprecip(ji,jj) = sf(jp_prec)%fnow(ji,jj,1) * rn_pfac ! total precipitation [kg/m2/s]
692	sprecip(ji,jj) = sf(jp_snow)%fnow(ji,jj,1) * rn_pfac ! solid precipitation [kg/m2/s]
693	END DO
694	END DO
695	!$OMP END PARALLEL
696	CALL iom_put( 'snowpre', sprecip * 86400. ) ! Snow precipitation
697	CALL iom_put( 'precip' , tprecip * 86400. ) ! Total precipitation
698
699	#if defined key_lim3
700	CALL wrk_alloc( jpi,jpj, zevap, zsnw )
701
702	! --- evaporation --- !
703	z1_lsub = 1._wp / Lsub
704
705	!$OMP PARALLEL
706	!$OMP DO schedule(static) private(jl, jj, ji)
707	DO jl = 1, jpl
708	DO jj = 1, jpj
709	DO ji = 1, jpi
710	evap_ice (ji,jj,jl) = rn_efac * qla_ice (ji,jj,jl) * z1_lsub ! sublimation
711	devap_ice(ji,jj,jl) = rn_efac * dqla_ice(ji,jj,jl) * z1_lsub ! d(sublimation)/dT
712	END DO
713	END DO
714	END DO
715	!$OMP DO schedule(static) private(jj, ji)
716	DO jj = 1, jpj
717	DO ji = 1, jpi
718	zevap (ji,jj) = rn_efac * ( emp(ji,jj) + tprecip(ji,jj) ) ! evaporation over ocean
719	! --- evaporation minus precipitation --- !
720	zsnw(ji,jj) = 0._wp
721	END DO
722	END DO
723	!$OMP END PARALLEL
724	CALL lim_thd_snwblow( pfrld, zsnw ) ! snow distribution over ice after wind blowing
725	emp_oce(:,:) = pfrld(:,:) * zevap(:,:) - ( tprecip(:,:) - sprecip(:,:) ) - sprecip(:,:) * (1._wp - zsnw )
726	emp_ice(:,:) = SUM( a_i_b(:,:,:) * evap_ice(:,:,:), dim=3 ) - sprecip(:,:) * zsnw
727	emp_tot(:,:) = emp_oce(:,:) + emp_ice(:,:)
728
729	! --- heat flux associated with emp --- !
730	qemp_oce(:,:) = - pfrld(:,:) * zevap(:,:) * sst_m(:,:) * rcp & ! evap at sst
731	& + ( tprecip(:,:) - sprecip(:,:) ) * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp & ! liquid precip at Tair
732	& + sprecip(:,:) * ( 1._wp - zsnw ) * & ! solid precip at min(Tair,Tsnow)
733	& ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
734	qemp_ice(:,:) = sprecip(:,:) * zsnw * & ! solid precip (only)
735	& ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
736
737	! --- total solar and non solar fluxes --- !
738	qns_tot(:,:) = pfrld(:,:) * qns_oce(:,:) + SUM( a_i_b(:,:,:) * qns_ice(:,:,:), dim=3 ) + qemp_ice(:,:) + qemp_oce(:,:)
739	qsr_tot(:,:) = pfrld(:,:) * qsr_oce(:,:) + SUM( a_i_b(:,:,:) * qsr_ice(:,:,:), dim=3 )
740
741	! --- heat content of precip over ice in J/m3 (to be used in 1D-thermo) --- !
742	qprec_ice(:,:) = rhosn * ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus )
743
744	! --- heat content of evap over ice in W/m2 (to be used in 1D-thermo) --- !
745	!$OMP PARALLEL DO schedule(static) private(jl)
746	DO jl = 1, jpl
747	qevap_ice(:,:,jl) = 0._wp ! should be -evap_ice(:,:,jl)( ( Tice - rt0 ) cpic * tmask(:,:,1) )
748	! But we do not have Tice => consider it at 0°C => evap=0
749	END DO
750	CALL wrk_dealloc( jpi,jpj, zevap, zsnw )
751	#endif
752
753	!--------------------------------------------------------------------
754	! FRACTIONs of net shortwave radiation which is not absorbed in the
755	! thin surface layer and penetrates inside the ice cover
756	! ( Maykut and Untersteiner, 1971 ; Ebert and Curry, 1993 )
757	!
758	ztmp1 = ( 0.18 * ( 1.0 - cldf_ice ) + 0.35 * cldf_ice )
759	ztmp2 = ( 0.82 * ( 1.0 - cldf_ice ) + 0.65 * cldf_ice )
760	!$OMP PARALLEL DO schedule(static) private(jj, ji)
761	DO jj = 1, jpj
762	DO ji = 1, jpi
763	fr1_i0(ji,jj) = ztmp1
764	fr2_i0(ji,jj) = ztmp2
765	END DO
766	END DO
767	!
768	!
769	IF(ln_ctl) THEN
770	CALL prt_ctl(tab3d_1=qla_ice , clinfo1=' blk_ice_core: qla_ice : ', tab3d_2=z_qsb , clinfo2=' z_qsb : ', kdim=jpl)
771	CALL prt_ctl(tab3d_1=z_qlw , clinfo1=' blk_ice_core: z_qlw : ', tab3d_2=dqla_ice, clinfo2=' dqla_ice : ', kdim=jpl)
772	CALL prt_ctl(tab3d_1=z_dqsb , clinfo1=' blk_ice_core: z_dqsb : ', tab3d_2=z_dqlw , clinfo2=' z_dqlw : ', kdim=jpl)
773	CALL prt_ctl(tab3d_1=dqns_ice, clinfo1=' blk_ice_core: dqns_ice : ', tab3d_2=qsr_ice , clinfo2=' qsr_ice : ', kdim=jpl)
774	CALL prt_ctl(tab3d_1=ptsu , clinfo1=' blk_ice_core: ptsu : ', tab3d_2=qns_ice , clinfo2=' qns_ice : ', kdim=jpl)
775	CALL prt_ctl(tab2d_1=tprecip , clinfo1=' blk_ice_core: tprecip : ', tab2d_2=sprecip , clinfo2=' sprecip : ')
776	ENDIF
777
778	CALL wrk_dealloc( jpi,jpj,jpl, z_qlw, z_qsb, z_dqlw, z_dqsb )
779	!
780	IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core_flx')
781
782	END SUBROUTINE blk_ice_core_flx
783	#endif
784
785	SUBROUTINE turb_core_2z( zt, zu, sst, T_zt, q_sat, q_zt, dU, &
786	& Cd, Ch, Ce , T_zu, q_zu )
787	!!----------------------------------------------------------------------
788	!! * ROUTINE turb_core *
789	!!
790	!! ** Purpose : Computes turbulent transfert coefficients of surface
791	!! fluxes according to Large & Yeager (2004) and Large & Yeager (2008)
792	!! If relevant (zt /= zu), adjust temperature and humidity from height zt to zu
793	!!
794	!! ** Method : Monin Obukhov Similarity Theory
795	!! + Large & Yeager (2004,2008) closure: CD_n10 = f(U_n10)
796	!!
797	!! ** References : Large & Yeager, 2004 / Large & Yeager, 2008
798	!!
799	!! ** Last update: Laurent Brodeau, June 2014:
800	!! - handles both cases zt=zu and zt/=zu
801	!! - optimized: less 2D arrays allocated and less operations
802	!! - better first guess of stability by checking air-sea difference of virtual temperature
803	!! rather than temperature difference only...
804	!! - added function "cd_neutral_10m" that uses the improved parametrization of
805	!! Large & Yeager 2008. Drag-coefficient reduction for Cyclone conditions!
806	!! - using code-wide physical constants defined into "phycst.mod" rather than redifining them
807	!! => 'vkarmn' and 'grav'
808	!!----------------------------------------------------------------------
809	REAL(wp), INTENT(in ) :: zt ! height for T_zt and q_zt [m]
810	REAL(wp), INTENT(in ) :: zu ! height for dU [m]
811	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: sst ! sea surface temperature [Kelvin]
812	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: T_zt ! potential air temperature [Kelvin]
813	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_sat ! sea surface specific humidity [kg/kg]
814	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_zt ! specific air humidity [kg/kg]
815	REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: dU ! relative wind module at zu [m/s]
816	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Cd ! transfer coefficient for momentum (tau)
817	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ch ! transfer coefficient for sensible heat (Q_sens)
818	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ce ! transfert coefficient for evaporation (Q_lat)
819	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: T_zu ! air temp. shifted at zu [K]
820	REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: q_zu ! spec. hum. shifted at zu [kg/kg]
821	!
822	INTEGER :: j_itt
823	INTEGER :: ji, jj ! dummy loop indices
824	INTEGER , PARAMETER :: nb_itt = 5 ! number of itterations
825	LOGICAL :: l_zt_equal_zu = .FALSE. ! if q and t are given at different height than U
826	!
827	REAL(wp), DIMENSION(:,:), POINTER :: U_zu ! relative wind at zu [m/s]
828	REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient
829	REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient
830	REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10
831	REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd
832	REAL(wp), DIMENSION(:,:), POINTER :: zeta_u ! stability parameter at height zu
833	REAL(wp), DIMENSION(:,:), POINTER :: zeta_t ! stability parameter at height zt
834	REAL(wp), DIMENSION(:,:), POINTER :: zpsi_h_u, zpsi_m_u
835	REAL(wp), DIMENSION(:,:), POINTER :: ztmp0, ztmp1, ztmp2
836	REAL(wp), DIMENSION(:,:), POINTER :: stab ! 1st stability test integer
837	!!----------------------------------------------------------------------
838
839	IF( nn_timing == 1 ) CALL timing_start('turb_core_2z')
840
841	CALL wrk_alloc( jpi,jpj, U_zu, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd )
842	CALL wrk_alloc( jpi,jpj, zeta_u, stab )
843	CALL wrk_alloc( jpi,jpj, zpsi_h_u, zpsi_m_u, ztmp0, ztmp1, ztmp2 )
844
845	l_zt_equal_zu = .FALSE.
846	IF( ABS(zu - zt) < 0.01 ) l_zt_equal_zu = .TRUE. ! testing "zu == zt" is risky with double precision
847
848	IF( .NOT. l_zt_equal_zu ) CALL wrk_alloc( jpi,jpj, zeta_t )
849
850	U_zu = MAX( 0.5 , dU ) ! relative wind speed at zu (normally 10m), we don't want to fall under 0.5 m/s
851
852	!! First guess of stability:
853	ztmp0 = T_zt(1. + 0.608q_zt) - sst(1. + 0.608q_sat) ! air-sea difference of virtual pot. temp. at zt
854	stab = 0.5 + sign(0.5,ztmp0) ! stab = 1 if dTv > 0 => STABLE, 0 if unstable
855
856	!! Neutral coefficients at 10m:
857	IF( ln_cdgw ) THEN ! wave drag case
858	!$OMP PARALLEL DO schedule(static) private(jj, ji)
859	DO jj = 1, jpj
860	DO ji = 1, jpi
861	cdn_wave(ji,jj) = cdn_wave(ji,jj) + rsmall * ( 1._wp - tmask(ji,jj,1) )
862	ztmp0 (ji,jj) = cdn_wave(ji,jj)
863	END DO
864	END DO
865	ELSE
866	ztmp0 = cd_neutral_10m( U_zu )
867	ENDIF
868	sqrt_Cd_n10 = SQRT( ztmp0 )
869	Ce_n10 = 1.e-3( 34.6 sqrt_Cd_n10 )
870	Ch_n10 = 1.e-3sqrt_Cd_n10(18.stab + 32.7(1. - stab))
871
872	!! Initializing transf. coeff. with their first guess neutral equivalents :
873	Cd = ztmp0 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt_Cd_n10
874
875	!! Initializing values at z_u with z_t values:
876	T_zu = T_zt ; q_zu = q_zt
877
878	!! * Now starting iteration loop
879	DO j_itt=1, nb_itt
880	!
881	ztmp1 = T_zu - sst ! Updating air/sea differences
882	ztmp2 = q_zu - q_sat
883
884	! Updating turbulent scales : (L&Y 2004 eq. (7))
885	ztmp1 = Ch/sqrt_Cdztmp1 ! theta
886	ztmp2 = Ce/sqrt_Cdztmp2 ! q
887
888	ztmp0 = T_zu(1. + 0.608q_zu) ! virtual potential temperature at zu
889
890	! Estimate the inverse of Monin-Obukov length (1/L) at height zu:
891	ztmp0 = (vkarmngrav/ztmp0(ztmp1(1.+0.608q_zu) + 0.608T_zuztmp2)) / (CdU_zuU_zu)
892	! ( CdU_zuU_zu is U*^2 at zu)
893
894	!! Stability parameters :
895	zeta_u = zu*ztmp0 ; zeta_u = sign( min(abs(zeta_u),10.0), zeta_u )
896	zpsi_h_u = psi_h( zeta_u )
897	zpsi_m_u = psi_m( zeta_u )
898
899	!! Shifting temperature and humidity at zu (L&Y 2004 eq. (9b-9c))
900	IF ( .NOT. l_zt_equal_zu ) THEN
901	zeta_t = zt*ztmp0 ; zeta_t = sign( min(abs(zeta_t),10.0), zeta_t )
902	stab = LOG(zu/zt) - zpsi_h_u + psi_h(zeta_t) ! stab just used as temp array!!!
903	T_zu = T_zt + ztmp1/vkarmnstab ! ztmp1 is still theta
904	q_zu = q_zt + ztmp2/vkarmnstab ! ztmp2 is still q
905	q_zu = max(0., q_zu)
906	END IF
907
908	IF( ln_cdgw ) THEN ! surface wave case
909	sqrt_Cd = vkarmn / ( vkarmn / sqrt_Cd_n10 - zpsi_m_u )
910	Cd = sqrt_Cd * sqrt_Cd
911	ELSE
912	! Update neutral wind speed at 10m and neutral Cd at 10m (L&Y 2004 eq. 9a)...
913	! In very rare low-wind conditions, the old way of estimating the
914	! neutral wind speed at 10m leads to a negative value that causes the code
915	! to crash. To prevent this a threshold of 0.25m/s is imposed.
916	ztmp0 = MAX( 0.25 , U_zu/(1. + sqrt_Cd_n10/vkarmn*(LOG(zu/10.) - zpsi_m_u)) ) ! U_n10
917	ztmp0 = cd_neutral_10m(ztmp0) ! Cd_n10
918	sqrt_Cd_n10 = sqrt(ztmp0)
919
920	Ce_n10 = 1.e-3 * (34.6 * sqrt_Cd_n10) ! L&Y 2004 eq. (6b)
921	stab = 0.5 + sign(0.5,zeta_u) ! update stability
922	Ch_n10 = 1.e-3sqrt_Cd_n10(18.stab + 32.7(1. - stab)) ! L&Y 2004 eq. (6c-6d)
923
924	!! Update of transfer coefficients:
925	ztmp1 = 1. + sqrt_Cd_n10/vkarmn*(LOG(zu/10.) - zpsi_m_u) ! L&Y 2004 eq. (10a)
926	Cd = ztmp0 / ( ztmp1*ztmp1 )
927	sqrt_Cd = SQRT( Cd )
928	ENDIF
929	!
930	ztmp0 = (LOG(zu/10.) - zpsi_h_u) / vkarmn / sqrt_Cd_n10
931	ztmp2 = sqrt_Cd / sqrt_Cd_n10
932	ztmp1 = 1. + Ch_n10*ztmp0
933	Ch = Ch_n10*ztmp2 / ztmp1 ! L&Y 2004 eq. (10b)
934	!
935	ztmp1 = 1. + Ce_n10*ztmp0
936	Ce = Ce_n10*ztmp2 / ztmp1 ! L&Y 2004 eq. (10c)
937	!
938	END DO
939
940	CALL wrk_dealloc( jpi,jpj, U_zu, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd )
941	CALL wrk_dealloc( jpi,jpj, zeta_u, stab )
942	CALL wrk_dealloc( jpi,jpj, zpsi_h_u, zpsi_m_u, ztmp0, ztmp1, ztmp2 )
943
944	IF( .NOT. l_zt_equal_zu ) CALL wrk_dealloc( jpi,jpj, zeta_t )
945
946	IF( nn_timing == 1 ) CALL timing_stop('turb_core_2z')
947	!
948	END SUBROUTINE turb_core_2z
949
950
951	FUNCTION cd_neutral_10m( zw10 )
952	!!----------------------------------------------------------------------
953	!! Estimate of the neutral drag coefficient at 10m as a function
954	!! of neutral wind speed at 10m
955	!!
956	!! Origin: Large & Yeager 2008 eq.(11a) and eq.(11b)
957	!!
958	!! Author: L. Brodeau, june 2014
959	!!----------------------------------------------------------------------
960	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zw10 ! scalar wind speed at 10m (m/s)
961	REAL(wp), DIMENSION(jpi,jpj) :: cd_neutral_10m
962	!
963	REAL(wp), DIMENSION(:,:), POINTER :: rgt33
964	!!----------------------------------------------------------------------
965	!
966	CALL wrk_alloc( jpi,jpj, rgt33 )
967	!
968	!! When wind speed > 33 m/s => Cyclone conditions => special treatment
969	rgt33 = 0.5_wp + SIGN( 0.5_wp, (zw10 - 33._wp) ) ! If zw10 < 33. => 0, else => 1
970	cd_neutral_10m = 1.e-3 * ( &
971	& (1._wp - rgt33)( 2.7_wp/zw10 + 0.142_wp + zw10/13.09_wp - 3.14807E-10zw10**6) & ! zw10< 33.
972	& + rgt33 * 2.34 ) ! zw10 >= 33.
973	!
974	CALL wrk_dealloc( jpi,jpj, rgt33)
975	!
976	END FUNCTION cd_neutral_10m
977
978
979	FUNCTION psi_m(pta) !! Psis, L&Y 2004 eq. (8c), (8d), (8e)
980	!-------------------------------------------------------------------------------
981	! universal profile stability function for momentum
982	!-------------------------------------------------------------------------------
983	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pta
984	!
985	REAL(wp), DIMENSION(jpi,jpj) :: psi_m
986	REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit
987	!-------------------------------------------------------------------------------
988	!
989	CALL wrk_alloc( jpi,jpj, X2, X, stabit )
990	!
991	X2 = SQRT( ABS( 1. - 16.*pta ) ) ; X2 = MAX( X2 , 1. ) ; X = SQRT( X2 )
992	stabit = 0.5 + SIGN( 0.5 , pta )
993	psi_m = -5.ptastabit & ! Stable
994	& + (1. - stabit)(2.LOG((1. + X)0.5) + LOG((1. + X2)0.5) - 2.ATAN(X) + rpi0.5) ! Unstable
995	!
996	CALL wrk_dealloc( jpi,jpj, X2, X, stabit )
997	!
998	END FUNCTION psi_m
999
1000
1001	FUNCTION psi_h( pta ) !! Psis, L&Y 2004 eq. (8c), (8d), (8e)
1002	!-------------------------------------------------------------------------------
1003	! universal profile stability function for temperature and humidity
1004	!-------------------------------------------------------------------------------
1005	REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pta
1006	!
1007	REAL(wp), DIMENSION(jpi,jpj) :: psi_h
1008	REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit
1009	!-------------------------------------------------------------------------------
1010	!
1011	CALL wrk_alloc( jpi,jpj, X2, X, stabit )
1012	!
1013	X2 = SQRT( ABS( 1. - 16.*pta ) ) ; X2 = MAX( X2 , 1. ) ; X = SQRT( X2 )
1014	stabit = 0.5 + SIGN( 0.5 , pta )
1015	psi_h = -5.ptastabit & ! Stable
1016	& + (1. - stabit)(2.LOG( (1. + X2)*0.5 )) ! Unstable
1017	!
1018	CALL wrk_dealloc( jpi,jpj, X2, X, stabit )
1019	!
1020	END FUNCTION psi_h
1021
1022	!!======================================================================
1023	END MODULE sbcblk_core

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