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sbcwave.F90 @ 12287

Last change on this file since 12287 was 12287, checked in by jcastill, 4 years ago
Fist attempt at adding wave momentum coupling (not tested)
File size: 21.4 KB

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1	MODULE sbcwave
2	!!======================================================================
3	!! * MODULE sbcwave *
4	!! Wave module
5	!!======================================================================
6	!! History : 3.3 ! 2011-09 (M. Adani) Original code: Drag Coefficient
7	!! : 3.4 ! 2012-10 (M. Adani) Stokes Drift
8	!! 3.6 ! 2014-09 (E. Clementi,P. Oddo) New Stokes Drift Computation
9	!! - ! 2016-12 (G. Madec, E. Clementi) update Stoke drift computation
10	!! + add sbc_wave_ini routine
11	!!----------------------------------------------------------------------
12
13	!!----------------------------------------------------------------------
14	!! sbc_stokes : calculate 3D Stokes-drift velocities
15	!! sbc_wave : wave data from wave model in netcdf files
16	!! sbc_wave_init : initialisation fo surface waves
17	!!----------------------------------------------------------------------
18	USE phycst ! physical constants
19	USE oce ! ocean variables
20	USE sbc_oce ! Surface boundary condition: ocean fields
21	USE zdf_oce, ONLY : ln_zdfqiao
22	USE bdy_oce ! open boundary condition variables
23	USE domvvl ! domain: variable volume layers
24	!
25	USE iom ! I/O manager library
26	USE in_out_manager ! I/O manager
27	USE lib_mpp ! distribued memory computing library
28	USE fldread ! read input fields
29	USE wrk_nemo !
30
31	IMPLICIT NONE
32	PRIVATE
33
34	PUBLIC sbc_stokes ! routine called in sbccpl
35	PUBLIC sbc_stress ! routine called in sbcmod
36	PUBLIC sbc_wave ! routine called in sbcmod
37	PUBLIC sbc_wave_init ! routine called in sbcmod
38
39	! Variables checking if the wave parameters are coupled (if not, they are read from file)
40	LOGICAL, PUBLIC :: cpl_hsig = .FALSE.
41	LOGICAL, PUBLIC :: cpl_phioc = .FALSE.
42	LOGICAL, PUBLIC :: cpl_sdrftx = .FALSE.
43	LOGICAL, PUBLIC :: cpl_sdrfty = .FALSE.
44	LOGICAL, PUBLIC :: cpl_wper = .FALSE.
45	LOGICAL, PUBLIC :: cpl_wnum = .FALSE.
46	LOGICAL, PUBLIC :: cpl_wstrf = .FALSE.
47	LOGICAL, PUBLIC :: cpl_tauw = .FALSE.
48	LOGICAL, PUBLIC :: cpl_wdrag = .FALSE.
49
50	INTEGER :: jpfld ! number of files to read for stokes drift
51	INTEGER :: jp_usd ! index of stokes drift (i-component) (m/s) at T-point
52	INTEGER :: jp_vsd ! index of stokes drift (j-component) (m/s) at T-point
53	INTEGER :: jp_hsw ! index of significant wave hight (m) at T-point
54	INTEGER :: jp_wmp ! index of mean wave period (s) at T-point
55
56	TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_cd ! structure of input fields (file informations, fields read) Drag Coefficient
57	TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_sd ! structure of input fields (file informations, fields read) Stokes Drift
58	TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_wn ! structure of input fields (file informations, fields read) wave number for Qiao
59	TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_tauoc ! structure of input fields (file informations, fields read) normalized wave stress into the ocean
60	TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf_tauw ! structure of input fields (file informations, fields read) ocean stress components from wave model
61	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: cdn_wave !:
62	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: hsw, wmp, wnum !:
63	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: tauoc_wave !:
64	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: tauw_x !:
65	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: tauw_y !:
66	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: tsd2d !:
67	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: div_sd !: barotropic stokes drift divergence
68	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:) :: ut0sd, vt0sd !: surface Stokes drift velocities at t-point
69	REAL(wp), PUBLIC, ALLOCATABLE, DIMENSION(:,:,:) :: usd , vsd , wsd !: Stokes drift velocities at u-, v- & w-points, resp.
70
71	!! * Substitutions
72	# include "vectopt_loop_substitute.h90"
73	!!----------------------------------------------------------------------
74	!! NEMO/OPA 3.7 , NEMO Consortium (2014)
75	!! $Id$
76	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
77	!!----------------------------------------------------------------------
78	CONTAINS
79
80	SUBROUTINE sbc_stokes( )
81	!!---------------------------------------------------------------------
82	!! * ROUTINE sbc_stokes *
83	!!
84	!! ** Purpose : compute the 3d Stokes Drift according to Breivik et al.,
85	!! 2014 (DOI: 10.1175/JPO-D-14-0020.1)
86	!!
87	!! ** Method : - Calculate Stokes transport speed
88	!! - Calculate horizontal divergence
89	!! - Integrate the horizontal divergenze from the bottom
90	!! ** action
91	!!---------------------------------------------------------------------
92	INTEGER :: jj, ji, jk ! dummy loop argument
93	INTEGER :: ik ! local integer
94	REAL(wp) :: ztransp, zfac, ztemp, zsp0
95	REAL(wp) :: zdep_u, zdep_v, zkh_u, zkh_v, zda_u, zda_v
96	REAL(wp), DIMENSION(:,:) , POINTER :: zk_t, zk_u, zk_v, zu0_sd, zv0_sd ! 2D workspace
97	REAL(wp), DIMENSION(:,:,:), POINTER :: ze3divh ! 3D workspace
98	!!---------------------------------------------------------------------
99	!
100	CALL wrk_alloc( jpi,jpj,jpk, ze3divh )
101	CALL wrk_alloc( jpi,jpj, zk_t, zk_u, zk_v, zu0_sd, zv0_sd )
102	!
103	!
104	zfac = 2.0_wp * rpi / 16.0_wp
105	DO jj = 1, jpj ! exp. wave number at t-point (Eq. (19) in Breivick et al. (2014) )
106	DO ji = 1, jpi
107	! Stokes drift velocity estimated from Hs and Tmean
108	ztransp = zfac * hsw(ji,jj)*hsw(ji,jj) / MAX( wmp(ji,jj) , 0.0000001_wp )
109	! Stokes surface speed
110	zsp0 = SQRT( ut0sd(ji,jj)ut0sd(ji,jj) + vt0sd(ji,jj)vt0sd(ji,jj) )
111	tsd2d(ji,jj) = zsp0
112	! Wavenumber scale
113	zk_t(ji,jj) = ABS( zsp0 ) / MAX( ABS( 5.97_wp*ztransp ) , 0.0000001_wp )
114	END DO
115	END DO
116	DO jj = 1, jpjm1 ! exp. wave number & Stokes drift velocity at u- & v-points
117	DO ji = 1, jpim1
118	zk_u(ji,jj) = 0.5_wp * ( zk_t(ji,jj) + zk_t(ji+1,jj) )
119	zk_v(ji,jj) = 0.5_wp * ( zk_t(ji,jj) + zk_t(ji,jj+1) )
120	!
121	zu0_sd(ji,jj) = 0.5_wp * ( ut0sd(ji,jj) + ut0sd(ji+1,jj) )
122	zv0_sd(ji,jj) = 0.5_wp * ( vt0sd(ji,jj) + vt0sd(ji,jj+1) )
123	END DO
124	END DO
125	!
126	! !== horizontal Stokes Drift 3D velocity ==!
127	DO jk = 1, jpkm1
128	DO jj = 2, jpjm1
129	DO ji = 2, jpim1
130	zdep_u = 0.5_wp * ( gdept_n(ji,jj,jk) + gdept_n(ji+1,jj,jk) )
131	zdep_v = 0.5_wp * ( gdept_n(ji,jj,jk) + gdept_n(ji,jj+1,jk) )
132	!
133	zkh_u = zk_u(ji,jj) * zdep_u ! k * depth
134	zkh_v = zk_v(ji,jj) * zdep_v
135	! ! Depth attenuation
136	zda_u = EXP( -2.0_wpzkh_u ) / ( 1.0_wp + 8.0_wpzkh_u )
137	zda_v = EXP( -2.0_wpzkh_v ) / ( 1.0_wp + 8.0_wpzkh_v )
138	!
139	usd(ji,jj,jk) = zda_u * zu0_sd(ji,jj) * umask(ji,jj,jk)
140	vsd(ji,jj,jk) = zda_v * zv0_sd(ji,jj) * vmask(ji,jj,jk)
141	END DO
142	END DO
143	END DO
144	CALL lbc_lnk( usd(:,:,:), 'U', vsd(:,:,:), 'V', -1. )
145	!
146	! !== vertical Stokes Drift 3D velocity ==!
147	!
148	DO jk = 1, jpkm1 ! Horizontal e3*divergence
149	DO jj = 2, jpj
150	DO ji = fs_2, jpi
151	ze3divh(ji,jj,jk) = ( e2u(ji ,jj) * e3u_n(ji ,jj,jk) * usd(ji ,jj,jk) &
152	& - e2u(ji-1,jj) * e3u_n(ji-1,jj,jk) * usd(ji-1,jj,jk) &
153	& + e1v(ji,jj ) * e3v_n(ji,jj ,jk) * vsd(ji,jj ,jk) &
154	& - e1v(ji,jj-1) * e3v_n(ji,jj-1,jk) * vsd(ji,jj-1,jk) ) * r1_e1e2t(ji,jj)
155	END DO
156	END DO
157	END DO
158	!
159	IF( .NOT. AGRIF_Root() ) THEN
160	IF( nbondi == 1 .OR. nbondi == 2 ) ze3divh(nlci-1, : ,:) = 0._wp ! east
161	IF( nbondi == -1 .OR. nbondi == 2 ) ze3divh( 2 , : ,:) = 0._wp ! west
162	IF( nbondj == 1 .OR. nbondj == 2 ) ze3divh( : ,nlcj-1,:) = 0._wp ! north
163	IF( nbondj == -1 .OR. nbondj == 2 ) ze3divh( : , 2 ,:) = 0._wp ! south
164	ENDIF
165	!
166	CALL lbc_lnk( ze3divh, 'T', 1. )
167	!
168	IF( ln_linssh ) THEN ; ik = 1 ! none zero velocity through the sea surface
169	ELSE ; ik = 2 ! w=0 at the surface (set one for all in sbc_wave_init)
170	ENDIF
171	DO jk = jpkm1, ik, -1 ! integrate from the bottom the hor. divergence (NB: at k=jpk w is always zero)
172	wsd(:,:,jk) = wsd(:,:,jk+1) - ze3divh(:,:,jk)
173	END DO
174	!
175	IF( ln_bdy ) THEN
176	DO jk = 1, jpkm1
177	wsd(:,:,jk) = wsd(:,:,jk) * bdytmask(:,:)
178	END DO
179	ENDIF
180	! !== Horizontal divergence of barotropic Stokes transport ==!
181	div_sd(:,:) = 0._wp
182	DO jk = 1, jpkm1 !
183	div_sd(:,:) = div_sd(:,:) + ze3divh(:,:,jk)
184	END DO
185	!
186	CALL iom_put( "ustokes", usd )
187	CALL iom_put( "vstokes", vsd )
188	CALL iom_put( "wstokes", wsd )
189	!
190	CALL wrk_dealloc( jpi,jpj,jpk, ze3divh )
191	CALL wrk_dealloc( jpi,jpj, zk_t, zk_u, zk_v, zu0_sd, zv0_sd )
192	!
193	END SUBROUTINE sbc_stokes
194
195	SUBROUTINE sbc_stress( )
196	!!---------------------------------------------------------------------
197	!! * ROUTINE sbc_stress *
198	!!
199	!! ** Purpose : Updates the ocean momentum modified by waves
200	!!
201	!! ** Method : - Calculate u,v components of stress depending on stress
202	!! model
203	!! - Calculate the stress module
204	!! - The wind module is not modified by waves
205	!! ** action
206	!!---------------------------------------------------------------------
207	INTEGER :: jj, ji ! dummy loop argument
208	!
209	IF( ln_tauoc ) THEN
210	utau(:,:) = utau(:,:)*tauoc_wave(:,:)
211	vtau(:,:) = vtau(:,:)*tauoc_wave(:,:)
212	taum(:,:) = taum(:,:)*tauoc_wave(:,:)
213	ENDIF
214	!
215	IF( ln_tauw ) THEN
216	DO jj = 1, jpjm1
217	DO ji = 1, jpim1
218	! Stress components at u- & v-points
219	utau(ji,jj) = 0.5_wp * ( tauw_x(ji,jj) + tauw_x(ji+1,jj) )
220	vtau(ji,jj) = 0.5_wp * ( tauw_y(ji,jj) + tauw_y(ji,jj+1) )
221	!
222	! Stress module at t points
223	taum(ji,jj) = SQRT( tauw_x(ji,jj)tauw_x(ji,jj) + tauw_y(ji,jj)tauw_y(ji,jj) )
224	END DO
225	END DO
226	CALL lbc_lnk_multi( utau(:,:), 'U', -1. , vtau(:,:), 'V', -1. , taum(:,: ), 'T', -1. )
227	ENDIF
228	!
229	END SUBROUTINE sbc_stress
230
231	SUBROUTINE sbc_wave( kt )
232	!!---------------------------------------------------------------------
233	!! * ROUTINE sbc_wave *
234	!!
235	!! ** Purpose : read wave parameters from wave model in netcdf files.
236	!!
237	!! ** Method : - Read namelist namsbc_wave
238	!! - Read Cd_n10 fields in netcdf files
239	!! - Read stokes drift 2d in netcdf files
240	!! - Read wave number in netcdf files
241	!! - Compute 3d stokes drift using Breivik et al.,2014
242	!! formulation
243	!! ** action
244	!!---------------------------------------------------------------------
245	INTEGER, INTENT(in ) :: kt ! ocean time step
246	!!---------------------------------------------------------------------
247	!
248	IF( ln_cdgw .AND. .NOT. cpl_wdrag ) THEN !== Neutral drag coefficient ==!
249	CALL fld_read( kt, nn_fsbc, sf_cd ) ! read from external forcing
250	cdn_wave(:,:) = sf_cd(1)%fnow(:,:,1)
251	ENDIF
252
253	IF( ln_tauoc .AND. .NOT. cpl_wstrf ) THEN !== Wave induced stress ==!
254	CALL fld_read( kt, nn_fsbc, sf_tauoc ) ! read wave norm stress from external forcing
255	tauoc_wave(:,:) = sf_tauoc(1)%fnow(:,:,1)
256	ENDIF
257
258	IF( ln_tauw .AND. .NOT. cpl_tauw ) THEN !== Wave induced stress ==!
259	CALL fld_read( kt, nn_fsbc, sf_tauw ) ! read ocean stress components from external forcing (T grid)
260	tauw_x(:,:) = sf_tauw(1)%fnow(:,:,1)
261	tauw_y(:,:) = sf_tauw(2)%fnow(:,:,1)
262	ENDIF
263
264	IF( ln_sdw ) THEN !== Computation of the 3d Stokes Drift ==!
265	!
266	IF( jpfld > 0 ) THEN ! Read from file only if the field is not coupled
267	CALL fld_read( kt, nn_fsbc, sf_sd ) ! read wave parameters from external forcing
268	IF( jp_hsw > 0 ) hsw (:,:) = sf_sd(jp_hsw)%fnow(:,:,1) ! significant wave height
269	IF( jp_wmp > 0 ) wmp (:,:) = sf_sd(jp_wmp)%fnow(:,:,1) ! wave mean period
270	IF( jp_usd > 0 ) ut0sd(:,:) = sf_sd(jp_usd)%fnow(:,:,1) ! 2D zonal Stokes Drift at T point
271	IF( jp_vsd > 0 ) vt0sd(:,:) = sf_sd(jp_vsd)%fnow(:,:,1) ! 2D meridional Stokes Drift at T point
272	ENDIF
273	!
274	! Read also wave number if needed, so that it is available in coupling routines
275	IF( ln_zdfqiao .AND. .NOT.cpl_wnum ) THEN
276	CALL fld_read( kt, nn_fsbc, sf_wn ) ! read wave parameters from external forcing
277	wnum(:,:) = sf_wn(1)%fnow(:,:,1)
278	ENDIF
279
280	! !== Computation of the 3d Stokes Drift ==!
281	!
282	IF( jpfld == 4 ) CALL sbc_stokes() ! Calculate only if required fields are read
283	! ! In coupled wave model-NEMO case the call is done after coupling
284	!
285	ENDIF
286	!
287	END SUBROUTINE sbc_wave
288
289
290	SUBROUTINE sbc_wave_init
291	!!---------------------------------------------------------------------
292	!! * ROUTINE sbc_wave_init *
293	!!
294	!! ** Purpose : read wave parameters from wave model in netcdf files.
295	!!
296	!! ** Method : - Read namelist namsbc_wave
297	!! - Read Cd_n10 fields in netcdf files
298	!! - Read stokes drift 2d in netcdf files
299	!! - Read wave number in netcdf files
300	!! - Compute 3d stokes drift using Breivik et al.,2014
301	!! formulation
302	!! ** action
303	!!---------------------------------------------------------------------
304	INTEGER :: ierror, ios ! local integer
305	INTEGER :: ifpr
306	!!
307	CHARACTER(len=100) :: cn_dir ! Root directory for location of drag coefficient files
308	TYPE(FLD_N), ALLOCATABLE, DIMENSION(:) :: slf_i, slf_j ! array of namelist informations on the fields to read
309	TYPE(FLD_N) :: sn_cdg, sn_usd, sn_vsd, &
310	& sn_hsw, sn_wmp, sn_wnum, sn_tauoc ! informations about the fields to be read
311	!
312	NAMELIST/namsbc_wave/ sn_cdg, cn_dir, sn_usd, sn_vsd, sn_hsw, sn_wmp, sn_wnum, sn_tauoc, sn_tauwx, sn_tauwy
313	!!---------------------------------------------------------------------
314	!
315	REWIND( numnam_ref ) ! Namelist namsbc_wave in reference namelist : File for drag coeff. from wave model
316	READ ( numnam_ref, namsbc_wave, IOSTAT = ios, ERR = 901)
317	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_wave in reference namelist', lwp )
318
319	REWIND( numnam_cfg ) ! Namelist namsbc_wave in configuration namelist : File for drag coeff. from wave model
320	READ ( numnam_cfg, namsbc_wave, IOSTAT = ios, ERR = 902 )
321	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_wave in configuration namelist', lwp )
322	IF(lwm) WRITE ( numond, namsbc_wave )
323	!
324	IF( ln_tauoc .AND. ln_tauw ) &
325	CALL ctl_stop( 'More than one method for modifying the ocean stress has been selected ', &
326	'(ln_tauoc=.true. and ln_tauw=.true.)' )
327	IF( ln_tauoc ) &
328	CALL ctl_warn( 'You are subtracting the wave stress to the ocean (ln_tauoc=.true.)' )
329	IF( ln_tauw ) &
330	CALL ctl_warn( 'The wave modified ocean stress components are used (ln_tauw=.true.) ', &
331	'This will override any other specification of the ocean stress' )
332
333	IF( ln_cdgw ) THEN
334	IF( .NOT. cpl_wdrag ) THEN
335	ALLOCATE( sf_cd(1), STAT=ierror ) !* allocate and fill sf_wave with sn_cdg
336	IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable to allocate sf_wave structure' )
337	!
338	ALLOCATE( sf_cd(1)%fnow(jpi,jpj,1) )
339	IF( sn_cdg%ln_tint ) ALLOCATE( sf_cd(1)%fdta(jpi,jpj,1,2) )
340	CALL fld_fill( sf_cd, (/ sn_cdg /), cn_dir, 'sbc_wave_init', 'Wave module ', 'namsbc_wave' )
341	ENDIF
342	ALLOCATE( cdn_wave(jpi,jpj) )
343	ENDIF
344
345	IF( ln_tauoc ) THEN
346	IF( .NOT. cpl_wstrf ) THEN
347	ALLOCATE( sf_tauoc(1), STAT=ierror ) !* allocate and fill sf_wave with sn_tauoc
348	IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable to allocate sf_wave structure' )
349	!
350	ALLOCATE( sf_tauoc(1)%fnow(jpi,jpj,1) )
351	IF( sn_tauoc%ln_tint ) ALLOCATE( sf_tauoc(1)%fdta(jpi,jpj,1,2) )
352	CALL fld_fill( sf_tauoc, (/ sn_tauoc /), cn_dir, 'sbc_wave_init', 'Wave module', 'namsbc_wave' )
353	ENDIF
354	ALLOCATE( tauoc_wave(jpi,jpj) )
355	ENDIF
356
357	IF( ln_tauw ) THEN
358	IF( .NOT. cpl_tauw ) THEN
359	ALLOCATE( sf_tauw(2), STAT=ierror ) !* allocate and fill sf_wave with sn_tauwx/y
360	IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable to allocate sf_tauw structure' )
361	!
362	ALLOCATE( slf_j(2) )
363	slf_j(1) = sn_tauwx
364	slf_j(2) = sn_tauwy
365	ALLOCATE( sf_tauw(1)%fnow(jpi,jpj,1) )
366	ALLOCATE( sf_tauw(2)%fnow(jpi,jpj,1) )
367	IF( slf_j(1)%ln_tint ) ALLOCATE( sf_tauw(1)%fdta(jpi,jpj,1,2) )
368	IF( slf_j(2)%ln_tint ) ALLOCATE( sf_tauw(2)%fdta(jpi,jpj,1,2) )
369	CALL fld_fill( sf_tauw, (/ slf_j /), cn_dir, 'sbc_wave_init', 'read wave input', 'namsbc_wave' )
370	ENDIF
371	ALLOCATE( tauw_x(jpi,jpj) )
372	ALLOCATE( tauw_y(jpi,jpj) )
373	ENDIF
374
375	IF( ln_sdw ) THEN ! Find out how many fields have to be read from file if not coupled
376	jpfld=0
377	jp_usd=0 ; jp_vsd=0 ; jp_hsw=0 ; jp_wmp=0
378	IF( .NOT. cpl_sdrftx ) THEN
379	jpfld = jpfld + 1
380	jp_usd = jpfld
381	ENDIF
382	IF( .NOT. cpl_sdrfty ) THEN
383	jpfld = jpfld + 1
384	jp_vsd = jpfld
385	ENDIF
386	IF( .NOT. cpl_hsig ) THEN
387	jpfld = jpfld + 1
388	jp_hsw = jpfld
389	ENDIF
390	IF( .NOT. cpl_wper ) THEN
391	jpfld = jpfld + 1
392	jp_wmp = jpfld
393	ENDIF
394
395	! Read from file only the non-coupled fields
396	IF( jpfld > 0 ) THEN
397	ALLOCATE( slf_i(jpfld) )
398	IF( jp_usd > 0 ) slf_i(jp_usd) = sn_usd
399	IF( jp_vsd > 0 ) slf_i(jp_vsd) = sn_vsd
400	IF( jp_hsw > 0 ) slf_i(jp_hsw) = sn_hsw
401	IF( jp_wmp > 0 ) slf_i(jp_wmp) = sn_wmp
402	ALLOCATE( sf_sd(jpfld), STAT=ierror ) !* allocate and fill sf_sd with stokes drift
403	IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable to allocate sf_wave structure' )
404	!
405	DO ifpr= 1, jpfld
406	ALLOCATE( sf_sd(ifpr)%fnow(jpi,jpj,1) )
407	IF( slf_i(ifpr)%ln_tint ) ALLOCATE( sf_sd(ifpr)%fdta(jpi,jpj,1,2) )
408	END DO
409	!
410	CALL fld_fill( sf_sd, slf_i, cn_dir, 'sbc_wave_init', 'Wave module ', 'namsbc_wave' )
411	ENDIF
412	ALLOCATE( usd (jpi,jpj,jpk), vsd (jpi,jpj,jpk), wsd(jpi,jpj,jpk) )
413	ALLOCATE( hsw (jpi,jpj) , wmp (jpi,jpj) )
414	ALLOCATE( ut0sd(jpi,jpj) , vt0sd(jpi,jpj) )
415	ALLOCATE( div_sd(jpi,jpj) )
416	ALLOCATE( tsd2d (jpi,jpj) )
417	usd(:,:,:) = 0._wp
418	vsd(:,:,:) = 0._wp
419	wsd(:,:,:) = 0._wp
420	! Wave number needed only if ln_zdfqiao=T
421	IF( .NOT. cpl_wnum ) THEN
422	ALLOCATE( sf_wn(1), STAT=ierror ) !* allocate and fill sf_wave with sn_wnum
423	IF( ierror > 0 ) CALL ctl_stop( 'STOP', 'sbc_wave_init: unable toallocate sf_wave structure' )
424	ALLOCATE( sf_wn(1)%fnow(jpi,jpj,1) )
425	IF( sn_wnum%ln_tint ) ALLOCATE( sf_wn(1)%fdta(jpi,jpj,1,2) )
426	CALL fld_fill( sf_wn, (/ sn_wnum /), cn_dir, 'sbc_wave', 'Wave module', 'namsbc_wave' )
427	ENDIF
428	ALLOCATE( wnum(jpi,jpj) )
429	ENDIF
430	!
431	END SUBROUTINE sbc_wave_init
432
433	!!======================================================================
434	END MODULE sbcwave

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