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bdyini.F90 in branches/2017/dev_merge_2017/NEMOGCM/NEMO/OPA_SRC/BDY – NEMO

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source: branches/2017/dev_merge_2017/NEMOGCM/NEMO/OPA_SRC/BDY/bdyini.F90 @ 9105

Last change on this file since 9105 was 9105, checked in by flavoni, 6 years ago
fix
Property svn:keywords set to `Id`
File size: 82.4 KB

Line
1	MODULE bdyini
2	!!======================================================================
3	!! * MODULE bdyini *
4	!! Unstructured open boundaries : initialisation
5	!!======================================================================
6	!! History : 1.0 ! 2005-01 (J. Chanut, A. Sellar) Original code
7	!! - ! 2007-01 (D. Storkey) Update to use IOM module
8	!! - ! 2007-01 (D. Storkey) Tidal forcing
9	!! 3.0 ! 2008-04 (NEMO team) add in the reference version
10	!! 3.3 ! 2010-09 (E.O'Dea) updates for Shelf configurations
11	!! 3.3 ! 2010-09 (D.Storkey) add ice boundary conditions
12	!! 3.4 ! 2011 (D. Storkey) rewrite in preparation for OBC-BDY merge
13	!! 3.4 ! 2012 (J. Chanut) straight open boundary case update
14	!! 3.5 ! 2012 (S. Mocavero, I. Epicoco) optimization of BDY communications
15	!! 3.7 ! 2016 (T. Lovato) Remove bdy macro, call here init for dta and tides
16	!!----------------------------------------------------------------------
17	!! bdy_init : Initialization of unstructured open boundaries
18	!!----------------------------------------------------------------------
19	USE oce ! ocean dynamics and tracers variables
20	USE dom_oce ! ocean space and time domain
21	USE bdy_oce ! unstructured open boundary conditions
22	USE bdydta ! open boundary cond. setting (bdy_dta_init routine)
23	USE bdytides ! open boundary cond. setting (bdytide_init routine)
24	USE sbctide ! Tidal forcing or not
25	USE phycst , ONLY: rday
26	!
27	USE in_out_manager ! I/O units
28	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
29	USE lib_mpp ! for mpp_sum
30	USE iom ! I/O
31	USE timing ! Timing
32
33	IMPLICIT NONE
34	PRIVATE
35
36	PUBLIC bdy_init ! routine called in nemo_init
37
38	INTEGER, PARAMETER :: jp_nseg = 100 !
39	INTEGER, PARAMETER :: nrimmax = 20 ! maximum rimwidth in structured
40	! open boundary data files
41	! Straight open boundary segment parameters:
42	INTEGER :: nbdysege, nbdysegw, nbdysegn, nbdysegs
43	INTEGER, DIMENSION(jp_nseg) :: jpieob, jpjedt, jpjeft, npckge !
44	INTEGER, DIMENSION(jp_nseg) :: jpiwob, jpjwdt, jpjwft, npckgw !
45	INTEGER, DIMENSION(jp_nseg) :: jpjnob, jpindt, jpinft, npckgn !
46	INTEGER, DIMENSION(jp_nseg) :: jpjsob, jpisdt, jpisft, npckgs !
47	!!----------------------------------------------------------------------
48	!! NEMO/OPA 3.7 , NEMO Consortium (2015)
49	!! $Id$
50	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
51	!!----------------------------------------------------------------------
52	CONTAINS
53
54	SUBROUTINE bdy_init
55	!!----------------------------------------------------------------------
56	!! * ROUTINE bdy_init *
57	!!
58	!! ** Purpose : Initialization of the dynamics and tracer fields with
59	!! unstructured open boundaries.
60	!!
61	!! ** Method : Read initialization arrays (mask, indices) to identify
62	!! an unstructured open boundary
63	!!
64	!! ** Input : bdy_init.nc, input file for unstructured open boundaries
65	!!----------------------------------------------------------------------
66	NAMELIST/nambdy/ ln_bdy, nb_bdy, ln_coords_file, cn_coords_file, &
67	& ln_mask_file, cn_mask_file, cn_dyn2d, nn_dyn2d_dta, &
68	& cn_dyn3d, nn_dyn3d_dta, cn_tra, nn_tra_dta, &
69	& ln_tra_dmp, ln_dyn3d_dmp, rn_time_dmp, rn_time_dmp_out, &
70	& cn_ice_lim, nn_ice_lim_dta, &
71	& rn_ice_tem, rn_ice_sal, rn_ice_age, &
72	& ln_vol, nn_volctl, nn_rimwidth, nb_jpk_bdy
73	!
74	INTEGER :: ios ! Local integer output status for namelist read
75	!!----------------------------------------------------------------------
76	!
77	IF( nn_timing == 1 ) CALL timing_start('bdy_init')
78
79	! ------------------------
80	! Read namelist parameters
81	! ------------------------
82	REWIND( numnam_ref ) ! Namelist nambdy in reference namelist :Unstructured open boundaries
83	READ ( numnam_ref, nambdy, IOSTAT = ios, ERR = 901)
84	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in reference namelist', lwp )
85	!
86	REWIND( numnam_cfg ) ! Namelist nambdy in configuration namelist :Unstructured open boundaries
87	READ ( numnam_cfg, nambdy, IOSTAT = ios, ERR = 902 )
88	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in configuration namelist', lwp )
89	IF(lwm) WRITE ( numond, nambdy )
90
91	! -----------------------------------------
92	! unstructured open boundaries use control
93	! -----------------------------------------
94	IF ( ln_bdy ) THEN
95	IF(lwp) WRITE(numout,*)
96	IF(lwp) WRITE(numout,*) 'bdy_init : initialization of open boundaries'
97	IF(lwp) WRITE(numout,*) '~~~~~~~~'
98	!
99	! Open boundaries definition (arrays and masks)
100	CALL bdy_segs
101	!
102	! Open boundaries initialisation of external data arrays
103	CALL bdy_dta_init
104	!
105	! Open boundaries initialisation of tidal harmonic forcing
106	IF( ln_tide ) CALL bdytide_init
107	!
108	ELSE
109	IF(lwp) WRITE(numout,*)
110	IF(lwp) WRITE(numout,*) 'bdy_init : open boundaries not used (ln_bdy = F)'
111	IF(lwp) WRITE(numout,*) '~~~~~~~~'
112	!
113	ENDIF
114	!
115	IF( nn_timing == 1 ) CALL timing_stop('bdy_init')
116	!
117	END SUBROUTINE bdy_init
118
119
120	SUBROUTINE bdy_segs
121	!!----------------------------------------------------------------------
122	!! * ROUTINE bdy_init *
123	!!
124	!! ** Purpose : Definition of unstructured open boundaries.
125	!!
126	!! ** Method : Read initialization arrays (mask, indices) to identify
127	!! an unstructured open boundary
128	!!
129	!! ** Input : bdy_init.nc, input file for unstructured open boundaries
130	!!----------------------------------------------------------------------
131	INTEGER :: ib_bdy, ii, ij, ik, igrd, ib, ir, iseg ! dummy loop indices
132	INTEGER :: icount, icountr, ibr_max, ilen1, ibm1 ! local integers
133	INTEGER :: iwe, ies, iso, ino, inum, id_dummy ! - -
134	INTEGER :: igrd_start, igrd_end, jpbdta ! - -
135	INTEGER :: jpbdtau, jpbdtas ! - -
136	INTEGER :: ib_bdy1, ib_bdy2, ib1, ib2 ! - -
137	INTEGER :: i_offset, j_offset ! - -
138	INTEGER , POINTER :: nbi, nbj, nbr ! short cuts
139	REAL(wp), POINTER :: flagu, flagv ! - -
140	REAL(wp), POINTER, DIMENSION(:,:) :: pmask ! pointer to 2D mask fields
141	REAL(wp) :: zefl, zwfl, znfl, zsfl ! local scalars
142	INTEGER, DIMENSION (2) :: kdimsz
143	INTEGER, DIMENSION(jpbgrd,jp_bdy) :: nblendta ! Length of index arrays
144	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbidta, nbjdta ! Index arrays: i and j indices of bdy dta
145	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbrdta ! Discrete distance from rim points
146	CHARACTER(LEN=1),DIMENSION(jpbgrd) :: cgrid
147	INTEGER :: com_east, com_west, com_south, com_north ! Flags for boundaries sending
148	INTEGER :: com_east_b, com_west_b, com_south_b, com_north_b ! Flags for boundaries receiving
149	INTEGER :: iw_b(4), ie_b(4), is_b(4), in_b(4) ! Arrays for neighbours coordinates
150	REAL(wp), TARGET, DIMENSION(jpi,jpj) :: zfmask ! temporary fmask array excluding coastal boundary condition (shlat)
151	!!
152	CHARACTER(LEN=1) :: ctypebdy ! - -
153	INTEGER :: nbdyind, nbdybeg, nbdyend
154	!!
155	NAMELIST/nambdy_index/ ctypebdy, nbdyind, nbdybeg, nbdyend
156	INTEGER :: ios ! Local integer output status for namelist read
157	!!----------------------------------------------------------------------
158	!
159	IF( nn_timing == 1 ) CALL timing_start('bdy_segs')
160	!
161	cgrid = (/'t','u','v'/)
162
163	! -----------------------------------------
164	! Check and write out namelist parameters
165	! -----------------------------------------
166	IF( jperio /= 0 ) CALL ctl_stop( 'bdy_segs: Cyclic or symmetric,', &
167	& ' and general open boundary condition are not compatible' )
168
169	IF( nb_bdy == 0 ) THEN
170	IF(lwp) WRITE(numout,*) 'nb_bdy = 0, NO OPEN BOUNDARIES APPLIED.'
171	ELSE
172	IF(lwp) WRITE(numout,*) 'Number of open boundary sets : ', nb_bdy
173	ENDIF
174
175	DO ib_bdy = 1,nb_bdy
176	IF(lwp) WRITE(numout,*) ' '
177	IF(lwp) WRITE(numout,*) '------ Open boundary data set ',ib_bdy,'------'
178
179	IF( ln_coords_file(ib_bdy) ) THEN
180	IF(lwp) WRITE(numout,*) 'Boundary definition read from file '//TRIM(cn_coords_file(ib_bdy))
181	ELSE
182	IF(lwp) WRITE(numout,*) 'Boundary defined in namelist.'
183	ENDIF
184	IF(lwp) WRITE(numout,*)
185
186	IF(lwp) WRITE(numout,*) 'Boundary conditions for barotropic solution: '
187	SELECT CASE( cn_dyn2d(ib_bdy) )
188	CASE( 'none' )
189	IF(lwp) WRITE(numout,*) ' no open boundary condition'
190	dta_bdy(ib_bdy)%ll_ssh = .false.
191	dta_bdy(ib_bdy)%ll_u2d = .false.
192	dta_bdy(ib_bdy)%ll_v2d = .false.
193	CASE( 'frs' )
194	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
195	dta_bdy(ib_bdy)%ll_ssh = .false.
196	dta_bdy(ib_bdy)%ll_u2d = .true.
197	dta_bdy(ib_bdy)%ll_v2d = .true.
198	CASE( 'flather' )
199	IF(lwp) WRITE(numout,*) ' Flather radiation condition'
200	dta_bdy(ib_bdy)%ll_ssh = .true.
201	dta_bdy(ib_bdy)%ll_u2d = .true.
202	dta_bdy(ib_bdy)%ll_v2d = .true.
203	CASE( 'orlanski' )
204	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
205	dta_bdy(ib_bdy)%ll_ssh = .false.
206	dta_bdy(ib_bdy)%ll_u2d = .true.
207	dta_bdy(ib_bdy)%ll_v2d = .true.
208	CASE( 'orlanski_npo' )
209	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
210	dta_bdy(ib_bdy)%ll_ssh = .false.
211	dta_bdy(ib_bdy)%ll_u2d = .true.
212	dta_bdy(ib_bdy)%ll_v2d = .true.
213	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn2d' )
214	END SELECT
215	IF( cn_dyn2d(ib_bdy) /= 'none' ) THEN
216	SELECT CASE( nn_dyn2d_dta(ib_bdy) ) !
217	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
218	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
219	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' tidal harmonic forcing taken from file'
220	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' boundary data AND tidal harmonic forcing taken from files'
221	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn2d_dta must be between 0 and 3' )
222	END SELECT
223	IF (( nn_dyn2d_dta(ib_bdy) .ge. 2 ).AND.(.NOT.ln_tide)) THEN
224	CALL ctl_stop( 'You must activate with ln_tide to add tidal forcing at open boundaries' )
225	ENDIF
226	ENDIF
227	IF(lwp) WRITE(numout,*)
228
229	IF(lwp) WRITE(numout,*) 'Boundary conditions for baroclinic velocities: '
230	SELECT CASE( cn_dyn3d(ib_bdy) )
231	CASE('none')
232	IF(lwp) WRITE(numout,*) ' no open boundary condition'
233	dta_bdy(ib_bdy)%ll_u3d = .false.
234	dta_bdy(ib_bdy)%ll_v3d = .false.
235	CASE('frs')
236	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
237	dta_bdy(ib_bdy)%ll_u3d = .true.
238	dta_bdy(ib_bdy)%ll_v3d = .true.
239	CASE('specified')
240	IF(lwp) WRITE(numout,*) ' Specified value'
241	dta_bdy(ib_bdy)%ll_u3d = .true.
242	dta_bdy(ib_bdy)%ll_v3d = .true.
243	CASE('neumann')
244	IF(lwp) WRITE(numout,*) ' Neumann conditions'
245	dta_bdy(ib_bdy)%ll_u3d = .false.
246	dta_bdy(ib_bdy)%ll_v3d = .false.
247	CASE('zerograd')
248	IF(lwp) WRITE(numout,*) ' Zero gradient for baroclinic velocities'
249	dta_bdy(ib_bdy)%ll_u3d = .false.
250	dta_bdy(ib_bdy)%ll_v3d = .false.
251	CASE('zero')
252	IF(lwp) WRITE(numout,*) ' Zero baroclinic velocities (runoff case)'
253	dta_bdy(ib_bdy)%ll_u3d = .false.
254	dta_bdy(ib_bdy)%ll_v3d = .false.
255	CASE('orlanski')
256	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
257	dta_bdy(ib_bdy)%ll_u3d = .true.
258	dta_bdy(ib_bdy)%ll_v3d = .true.
259	CASE('orlanski_npo')
260	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
261	dta_bdy(ib_bdy)%ll_u3d = .true.
262	dta_bdy(ib_bdy)%ll_v3d = .true.
263	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn3d' )
264	END SELECT
265	IF( cn_dyn3d(ib_bdy) /= 'none' ) THEN
266	SELECT CASE( nn_dyn3d_dta(ib_bdy) ) !
267	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
268	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
269	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn3d_dta must be 0 or 1' )
270	END SELECT
271	ENDIF
272
273	IF ( ln_dyn3d_dmp(ib_bdy) ) THEN
274	IF ( cn_dyn3d(ib_bdy) == 'none' ) THEN
275	IF(lwp) WRITE(numout,*) 'No open boundary condition for baroclinic velocities: ln_dyn3d_dmp is set to .false.'
276	ln_dyn3d_dmp(ib_bdy)=.false.
277	ELSEIF ( cn_dyn3d(ib_bdy) == 'frs' ) THEN
278	CALL ctl_stop( 'Use FRS OR relaxation' )
279	ELSE
280	IF(lwp) WRITE(numout,*) ' + baroclinic velocities relaxation zone'
281	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
282	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
283	dta_bdy(ib_bdy)%ll_u3d = .true.
284	dta_bdy(ib_bdy)%ll_v3d = .true.
285	ENDIF
286	ELSE
287	IF(lwp) WRITE(numout,*) ' NO relaxation on baroclinic velocities'
288	ENDIF
289	IF(lwp) WRITE(numout,*)
290
291	IF(lwp) WRITE(numout,*) 'Boundary conditions for temperature and salinity: '
292	SELECT CASE( cn_tra(ib_bdy) )
293	CASE('none')
294	IF(lwp) WRITE(numout,*) ' no open boundary condition'
295	dta_bdy(ib_bdy)%ll_tem = .false.
296	dta_bdy(ib_bdy)%ll_sal = .false.
297	CASE('frs')
298	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
299	dta_bdy(ib_bdy)%ll_tem = .true.
300	dta_bdy(ib_bdy)%ll_sal = .true.
301	CASE('specified')
302	IF(lwp) WRITE(numout,*) ' Specified value'
303	dta_bdy(ib_bdy)%ll_tem = .true.
304	dta_bdy(ib_bdy)%ll_sal = .true.
305	CASE('neumann')
306	IF(lwp) WRITE(numout,*) ' Neumann conditions'
307	dta_bdy(ib_bdy)%ll_tem = .false.
308	dta_bdy(ib_bdy)%ll_sal = .false.
309	CASE('runoff')
310	IF(lwp) WRITE(numout,*) ' Runoff conditions : Neumann for T and specified to 0.1 for salinity'
311	dta_bdy(ib_bdy)%ll_tem = .false.
312	dta_bdy(ib_bdy)%ll_sal = .false.
313	CASE('orlanski')
314	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
315	dta_bdy(ib_bdy)%ll_tem = .true.
316	dta_bdy(ib_bdy)%ll_sal = .true.
317	CASE('orlanski_npo')
318	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
319	dta_bdy(ib_bdy)%ll_tem = .true.
320	dta_bdy(ib_bdy)%ll_sal = .true.
321	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_tra' )
322	END SELECT
323	IF( cn_tra(ib_bdy) /= 'none' ) THEN
324	SELECT CASE( nn_tra_dta(ib_bdy) ) !
325	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
326	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
327	CASE DEFAULT ; CALL ctl_stop( 'nn_tra_dta must be 0 or 1' )
328	END SELECT
329	ENDIF
330
331	IF ( ln_tra_dmp(ib_bdy) ) THEN
332	IF ( cn_tra(ib_bdy) == 'none' ) THEN
333	IF(lwp) WRITE(numout,*) 'No open boundary condition for tracers: ln_tra_dmp is set to .false.'
334	ln_tra_dmp(ib_bdy)=.false.
335	ELSEIF ( cn_tra(ib_bdy) == 'frs' ) THEN
336	CALL ctl_stop( 'Use FRS OR relaxation' )
337	ELSE
338	IF(lwp) WRITE(numout,*) ' + T/S relaxation zone'
339	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
340	IF(lwp) WRITE(numout,*) ' Outflow damping time scale: ',rn_time_dmp_out(ib_bdy),' days'
341	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
342	dta_bdy(ib_bdy)%ll_tem = .true.
343	dta_bdy(ib_bdy)%ll_sal = .true.
344	ENDIF
345	ELSE
346	IF(lwp) WRITE(numout,*) ' NO T/S relaxation'
347	ENDIF
348	IF(lwp) WRITE(numout,*)
349
350	#if defined key_lim3
351	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
352	SELECT CASE( cn_ice_lim(ib_bdy) )
353	CASE('none')
354	IF(lwp) WRITE(numout,*) ' no open boundary condition'
355	dta_bdy(ib_bdy)%ll_a_i = .false.
356	dta_bdy(ib_bdy)%ll_h_i = .false.
357	dta_bdy(ib_bdy)%ll_h_s = .false.
358	CASE('frs')
359	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
360	dta_bdy(ib_bdy)%ll_a_i = .true.
361	dta_bdy(ib_bdy)%ll_h_i = .true.
362	dta_bdy(ib_bdy)%ll_h_s = .true.
363	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_ice_lim' )
364	END SELECT
365	IF( cn_ice_lim(ib_bdy) /= 'none' ) THEN
366	SELECT CASE( nn_ice_lim_dta(ib_bdy) ) !
367	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
368	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
369	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_lim_dta must be 0 or 1' )
370	END SELECT
371	ENDIF
372	IF(lwp) WRITE(numout,*)
373	IF(lwp) WRITE(numout,*) ' tem of bdy sea-ice = ', rn_ice_tem(ib_bdy)
374	IF(lwp) WRITE(numout,*) ' sal of bdy sea-ice = ', rn_ice_sal(ib_bdy)
375	IF(lwp) WRITE(numout,*) ' age of bdy sea-ice = ', rn_ice_age(ib_bdy)
376	#endif
377
378	IF(lwp) WRITE(numout,*) ' Width of relaxation zone = ', nn_rimwidth(ib_bdy)
379	IF(lwp) WRITE(numout,*)
380	!
381	END DO
382
383	IF( nb_bdy > 0 ) THEN
384	IF( ln_vol ) THEN ! check volume conservation (nn_volctl value)
385	IF(lwp) WRITE(numout,*) 'Volume correction applied at open boundaries'
386	IF(lwp) WRITE(numout,*)
387	SELECT CASE ( nn_volctl )
388	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' The total volume will be constant'
389	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' The total volume will vary according to the surface E-P flux'
390	CASE DEFAULT ; CALL ctl_stop( 'nn_volctl must be 0 or 1' )
391	END SELECT
392	IF(lwp) WRITE(numout,*)
393	ELSE
394	IF(lwp) WRITE(numout,*) 'No volume correction applied at open boundaries'
395	IF(lwp) WRITE(numout,*)
396	ENDIF
397	IF( nb_jpk_bdy > 0 ) THEN
398	IF(lwp) WRITE(numout,) ' open boundary will be interpolate in the vertical onto the native grid *'
399	ELSE
400	IF(lwp) WRITE(numout,) ' open boundary will be read straight onto the native grid without vertical interpolation *'
401	ENDIF
402	ENDIF
403
404	! -------------------------------------------------
405	! Initialise indices arrays for open boundaries
406	! -------------------------------------------------
407
408	! Work out global dimensions of boundary data
409	! ---------------------------------------------
410	REWIND( numnam_cfg )
411
412	nblendta(:,:) = 0
413	nbdysege = 0
414	nbdysegw = 0
415	nbdysegn = 0
416	nbdysegs = 0
417	icount = 0 ! count user defined segments
418	! Dimensions below are used to allocate arrays to read external data
419	jpbdtas = 1 ! Maximum size of boundary data (structured case)
420	jpbdtau = 1 ! Maximum size of boundary data (unstructured case)
421
422	DO ib_bdy = 1, nb_bdy
423
424	IF( .NOT. ln_coords_file(ib_bdy) ) THEN ! Work out size of global arrays from namelist parameters
425
426	icount = icount + 1
427	! No REWIND here because may need to read more than one nambdy_index namelist.
428	! Read only namelist_cfg to avoid unseccessfull overwrite
429	!! REWIND( numnam_ref ) ! Namelist nambdy_index in reference namelist : Open boundaries indexes
430	!! READ ( numnam_ref, namrun, IOSTAT = ios, ERR = 903)
431	!!903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in reference namelist', lwp )
432
433	!! REWIND( numnam_cfg ) ! Namelist nambdy_index in configuration namelist : Open boundaries indexes
434	READ ( numnam_cfg, nambdy_index, IOSTAT = ios, ERR = 904 )
435	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in configuration namelist', lwp )
436	IF(lwm) WRITE ( numond, nambdy_index )
437
438	SELECT CASE ( TRIM(ctypebdy) )
439	CASE( 'N' )
440	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
441	nbdyind = jpjglo - 2 ! set boundary to whole side of model domain.
442	nbdybeg = 2
443	nbdyend = jpiglo - 1
444	ENDIF
445	nbdysegn = nbdysegn + 1
446	npckgn(nbdysegn) = ib_bdy ! Save bdy package number
447	jpjnob(nbdysegn) = nbdyind
448	jpindt(nbdysegn) = nbdybeg
449	jpinft(nbdysegn) = nbdyend
450	!
451	CASE( 'S' )
452	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
453	nbdyind = 2 ! set boundary to whole side of model domain.
454	nbdybeg = 2
455	nbdyend = jpiglo - 1
456	ENDIF
457	nbdysegs = nbdysegs + 1
458	npckgs(nbdysegs) = ib_bdy ! Save bdy package number
459	jpjsob(nbdysegs) = nbdyind
460	jpisdt(nbdysegs) = nbdybeg
461	jpisft(nbdysegs) = nbdyend
462	!
463	CASE( 'E' )
464	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
465	nbdyind = jpiglo - 2 ! set boundary to whole side of model domain.
466	nbdybeg = 2
467	nbdyend = jpjglo - 1
468	ENDIF
469	nbdysege = nbdysege + 1
470	npckge(nbdysege) = ib_bdy ! Save bdy package number
471	jpieob(nbdysege) = nbdyind
472	jpjedt(nbdysege) = nbdybeg
473	jpjeft(nbdysege) = nbdyend
474	!
475	CASE( 'W' )
476	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
477	nbdyind = 2 ! set boundary to whole side of model domain.
478	nbdybeg = 2
479	nbdyend = jpjglo - 1
480	ENDIF
481	nbdysegw = nbdysegw + 1
482	npckgw(nbdysegw) = ib_bdy ! Save bdy package number
483	jpiwob(nbdysegw) = nbdyind
484	jpjwdt(nbdysegw) = nbdybeg
485	jpjwft(nbdysegw) = nbdyend
486	!
487	CASE DEFAULT ; CALL ctl_stop( 'ctypebdy must be N, S, E or W' )
488	END SELECT
489
490	! For simplicity we assume that in case of straight bdy, arrays have the same length
491	! (even if it is true that last tangential velocity points
492	! are useless). This simplifies a little bit boundary data format (and agrees with format
493	! used so far in obc package)
494
495	nblendta(1:jpbgrd,ib_bdy) = (nbdyend - nbdybeg + 1) * nn_rimwidth(ib_bdy)
496	jpbdtas = MAX(jpbdtas, (nbdyend - nbdybeg + 1))
497	IF (lwp.and.(nn_rimwidth(ib_bdy)>nrimmax)) &
498	& CALL ctl_stop( 'rimwidth must be lower than nrimmax' )
499
500	ELSE ! Read size of arrays in boundary coordinates file.
501	CALL iom_open( cn_coords_file(ib_bdy), inum )
502	DO igrd = 1, jpbgrd
503	id_dummy = iom_varid( inum, 'nbi'//cgrid(igrd), kdimsz=kdimsz )
504	nblendta(igrd,ib_bdy) = MAXVAL(kdimsz)
505	jpbdtau = MAX(jpbdtau, MAXVAL(kdimsz))
506	END DO
507	CALL iom_close( inum )
508	!
509	ENDIF
510	!
511	END DO ! ib_bdy
512
513	IF (nb_bdy>0) THEN
514	jpbdta = MAXVAL(nblendta(1:jpbgrd,1:nb_bdy))
515
516	! Allocate arrays
517	!---------------
518	ALLOCATE( nbidta(jpbdta, jpbgrd, nb_bdy), nbjdta(jpbdta, jpbgrd, nb_bdy), &
519	& nbrdta(jpbdta, jpbgrd, nb_bdy) )
520
521	IF( nb_jpk_bdy>0 ) THEN
522	ALLOCATE( dta_global(jpbdtau, 1, nb_jpk_bdy) )
523	ALLOCATE( dta_global_z(jpbdtau, 1, nb_jpk_bdy) )
524	ALLOCATE( dta_global_dz(jpbdtau, 1, nb_jpk_bdy) )
525	ELSE
526	ALLOCATE( dta_global(jpbdtau, 1, jpk) )
527	ALLOCATE( dta_global_z(jpbdtau, 1, jpk) ) ! needed ?? TODO
528	ALLOCATE( dta_global_dz(jpbdtau, 1, jpk) )! needed ?? TODO
529	ENDIF
530
531	IF ( icount>0 ) THEN
532	IF( nb_jpk_bdy>0 ) THEN
533	ALLOCATE( dta_global2(jpbdtas, nrimmax, nb_jpk_bdy) )
534	ALLOCATE( dta_global2_z(jpbdtas, nrimmax, nb_jpk_bdy) )
535	ALLOCATE( dta_global2_dz(jpbdtas, nrimmax, nb_jpk_bdy) )
536	ELSE
537	ALLOCATE( dta_global2(jpbdtas, nrimmax, jpk) )
538	ALLOCATE( dta_global2_z(jpbdtas, nrimmax, jpk) ) ! needed ?? TODO
539	ALLOCATE( dta_global2_dz(jpbdtas, nrimmax, jpk) )! needed ?? TODO
540	ENDIF
541	ENDIF
542	!
543	ENDIF
544
545	! Now look for crossings in user (namelist) defined open boundary segments:
546	!--------------------------------------------------------------------------
547	IF( icount>0 ) CALL bdy_ctl_seg
548
549	! Calculate global boundary index arrays or read in from file
550	!------------------------------------------------------------
551	! 1. Read global index arrays from boundary coordinates file.
552	DO ib_bdy = 1, nb_bdy
553	!
554	IF( ln_coords_file(ib_bdy) ) THEN
555	!
556	CALL iom_open( cn_coords_file(ib_bdy), inum )
557	DO igrd = 1, jpbgrd
558	CALL iom_get( inum, jpdom_unknown, 'nbi'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
559	DO ii = 1,nblendta(igrd,ib_bdy)
560	nbidta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
561	END DO
562	CALL iom_get( inum, jpdom_unknown, 'nbj'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
563	DO ii = 1,nblendta(igrd,ib_bdy)
564	nbjdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
565	END DO
566	CALL iom_get( inum, jpdom_unknown, 'nbr'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
567	DO ii = 1,nblendta(igrd,ib_bdy)
568	nbrdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
569	END DO
570	!
571	ibr_max = MAXVAL( nbrdta(:,igrd,ib_bdy) )
572	IF(lwp) WRITE(numout,*)
573	IF(lwp) WRITE(numout,*) ' Maximum rimwidth in file is ', ibr_max
574	IF(lwp) WRITE(numout,*) ' nn_rimwidth from namelist is ', nn_rimwidth(ib_bdy)
575	IF (ibr_max < nn_rimwidth(ib_bdy)) &
576	CALL ctl_stop( 'nn_rimwidth is larger than maximum rimwidth in file',cn_coords_file(ib_bdy) )
577	END DO
578	CALL iom_close( inum )
579	!
580	ENDIF
581	!
582	END DO
583
584	! 2. Now fill indices corresponding to straight open boundary arrays:
585	! East
586	!-----
587	DO iseg = 1, nbdysege
588	ib_bdy = npckge(iseg)
589	!
590	! ------------ T points -------------
591	igrd=1
592	icount=0
593	DO ir = 1, nn_rimwidth(ib_bdy)
594	DO ij = jpjedt(iseg), jpjeft(iseg)
595	icount = icount + 1
596	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
597	nbjdta(icount, igrd, ib_bdy) = ij
598	nbrdta(icount, igrd, ib_bdy) = ir
599	ENDDO
600	ENDDO
601	!
602	! ------------ U points -------------
603	igrd=2
604	icount=0
605	DO ir = 1, nn_rimwidth(ib_bdy)
606	DO ij = jpjedt(iseg), jpjeft(iseg)
607	icount = icount + 1
608	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 1 - ir
609	nbjdta(icount, igrd, ib_bdy) = ij
610	nbrdta(icount, igrd, ib_bdy) = ir
611	ENDDO
612	ENDDO
613	!
614	! ------------ V points -------------
615	igrd=3
616	icount=0
617	DO ir = 1, nn_rimwidth(ib_bdy)
618	! DO ij = jpjedt(iseg), jpjeft(iseg) - 1
619	DO ij = jpjedt(iseg), jpjeft(iseg)
620	icount = icount + 1
621	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
622	nbjdta(icount, igrd, ib_bdy) = ij
623	nbrdta(icount, igrd, ib_bdy) = ir
624	ENDDO
625	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
626	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
627	ENDDO
628	ENDDO
629	!
630	! West
631	!-----
632	DO iseg = 1, nbdysegw
633	ib_bdy = npckgw(iseg)
634	!
635	! ------------ T points -------------
636	igrd=1
637	icount=0
638	DO ir = 1, nn_rimwidth(ib_bdy)
639	DO ij = jpjwdt(iseg), jpjwft(iseg)
640	icount = icount + 1
641	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
642	nbjdta(icount, igrd, ib_bdy) = ij
643	nbrdta(icount, igrd, ib_bdy) = ir
644	ENDDO
645	ENDDO
646	!
647	! ------------ U points -------------
648	igrd=2
649	icount=0
650	DO ir = 1, nn_rimwidth(ib_bdy)
651	DO ij = jpjwdt(iseg), jpjwft(iseg)
652	icount = icount + 1
653	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
654	nbjdta(icount, igrd, ib_bdy) = ij
655	nbrdta(icount, igrd, ib_bdy) = ir
656	ENDDO
657	ENDDO
658	!
659	! ------------ V points -------------
660	igrd=3
661	icount=0
662	DO ir = 1, nn_rimwidth(ib_bdy)
663	! DO ij = jpjwdt(iseg), jpjwft(iseg) - 1
664	DO ij = jpjwdt(iseg), jpjwft(iseg)
665	icount = icount + 1
666	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
667	nbjdta(icount, igrd, ib_bdy) = ij
668	nbrdta(icount, igrd, ib_bdy) = ir
669	ENDDO
670	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
671	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
672	ENDDO
673	ENDDO
674	!
675	! North
676	!-----
677	DO iseg = 1, nbdysegn
678	ib_bdy = npckgn(iseg)
679	!
680	! ------------ T points -------------
681	igrd=1
682	icount=0
683	DO ir = 1, nn_rimwidth(ib_bdy)
684	DO ii = jpindt(iseg), jpinft(iseg)
685	icount = icount + 1
686	nbidta(icount, igrd, ib_bdy) = ii
687	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
688	nbrdta(icount, igrd, ib_bdy) = ir
689	ENDDO
690	ENDDO
691	!
692	! ------------ U points -------------
693	igrd=2
694	icount=0
695	DO ir = 1, nn_rimwidth(ib_bdy)
696	! DO ii = jpindt(iseg), jpinft(iseg) - 1
697	DO ii = jpindt(iseg), jpinft(iseg)
698	icount = icount + 1
699	nbidta(icount, igrd, ib_bdy) = ii
700	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
701	nbrdta(icount, igrd, ib_bdy) = ir
702	ENDDO
703	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
704	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
705	ENDDO
706	!
707	! ------------ V points -------------
708	igrd=3
709	icount=0
710	DO ir = 1, nn_rimwidth(ib_bdy)
711	DO ii = jpindt(iseg), jpinft(iseg)
712	icount = icount + 1
713	nbidta(icount, igrd, ib_bdy) = ii
714	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 1 - ir
715	nbrdta(icount, igrd, ib_bdy) = ir
716	ENDDO
717	ENDDO
718	ENDDO
719	!
720	! South
721	!-----
722	DO iseg = 1, nbdysegs
723	ib_bdy = npckgs(iseg)
724	!
725	! ------------ T points -------------
726	igrd=1
727	icount=0
728	DO ir = 1, nn_rimwidth(ib_bdy)
729	DO ii = jpisdt(iseg), jpisft(iseg)
730	icount = icount + 1
731	nbidta(icount, igrd, ib_bdy) = ii
732	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
733	nbrdta(icount, igrd, ib_bdy) = ir
734	ENDDO
735	ENDDO
736	!
737	! ------------ U points -------------
738	igrd=2
739	icount=0
740	DO ir = 1, nn_rimwidth(ib_bdy)
741	! DO ii = jpisdt(iseg), jpisft(iseg) - 1
742	DO ii = jpisdt(iseg), jpisft(iseg)
743	icount = icount + 1
744	nbidta(icount, igrd, ib_bdy) = ii
745	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
746	nbrdta(icount, igrd, ib_bdy) = ir
747	ENDDO
748	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
749	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
750	ENDDO
751	!
752	! ------------ V points -------------
753	igrd=3
754	icount=0
755	DO ir = 1, nn_rimwidth(ib_bdy)
756	DO ii = jpisdt(iseg), jpisft(iseg)
757	icount = icount + 1
758	nbidta(icount, igrd, ib_bdy) = ii
759	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
760	nbrdta(icount, igrd, ib_bdy) = ir
761	ENDDO
762	ENDDO
763	ENDDO
764
765	! Deal with duplicated points
766	!-----------------------------
767	! We assign negative indices to duplicated points (to remove them from bdy points to be updated)
768	! if their distance to the bdy is greater than the other
769	! If their distance are the same, just keep only one to avoid updating a point twice
770	DO igrd = 1, jpbgrd
771	DO ib_bdy1 = 1, nb_bdy
772	DO ib_bdy2 = 1, nb_bdy
773	IF (ib_bdy1/=ib_bdy2) THEN
774	DO ib1 = 1, nblendta(igrd,ib_bdy1)
775	DO ib2 = 1, nblendta(igrd,ib_bdy2)
776	IF ((nbidta(ib1, igrd, ib_bdy1)==nbidta(ib2, igrd, ib_bdy2)).AND. &
777	& (nbjdta(ib1, igrd, ib_bdy1)==nbjdta(ib2, igrd, ib_bdy2))) THEN
778	! IF ((lwp).AND.(igrd==1)) WRITE(numout,*) ' found coincident point ji, jj:', &
779	! & nbidta(ib1, igrd, ib_bdy1), &
780	! & nbjdta(ib2, igrd, ib_bdy2)
781	! keep only points with the lowest distance to boundary:
782	IF (nbrdta(ib1, igrd, ib_bdy1)<nbrdta(ib2, igrd, ib_bdy2)) THEN
783	nbidta(ib2, igrd, ib_bdy2) =-ib_bdy2
784	nbjdta(ib2, igrd, ib_bdy2) =-ib_bdy2
785	ELSEIF (nbrdta(ib1, igrd, ib_bdy1)>nbrdta(ib2, igrd, ib_bdy2)) THEN
786	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
787	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
788	! Arbitrary choice if distances are the same:
789	ELSE
790	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
791	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
792	ENDIF
793	END IF
794	END DO
795	END DO
796	ENDIF
797	END DO
798	END DO
799	END DO
800
801	! Work out dimensions of boundary data on each processor
802	! ------------------------------------------------------
803
804	! Rather assume that boundary data indices are given on global domain
805	! TO BE DISCUSSED ?
806	! iw = mig(1) + 1 ! if monotasking and no zoom, iw=2
807	! ie = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
808	! is = mjg(1) + 1 ! if monotasking and no zoom, is=2
809	! in = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
810	iwe = mig(1) - 1 + 2 ! if monotasking and no zoom, iw=2
811	ies = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
812	iso = mjg(1) - 1 + 2 ! if monotasking and no zoom, is=2
813	ino = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
814
815	ALLOCATE( nbondi_bdy(nb_bdy))
816	ALLOCATE( nbondj_bdy(nb_bdy))
817	nbondi_bdy(:)=2
818	nbondj_bdy(:)=2
819	ALLOCATE( nbondi_bdy_b(nb_bdy))
820	ALLOCATE( nbondj_bdy_b(nb_bdy))
821	nbondi_bdy_b(:)=2
822	nbondj_bdy_b(:)=2
823
824	! Work out dimensions of boundary data on each neighbour process
825	IF(nbondi == 0) THEN
826	iw_b(1) = 1 + nimppt(nowe+1)
827	ie_b(1) = 1 + nimppt(nowe+1)+nlcit(nowe+1)-3
828	is_b(1) = 1 + njmppt(nowe+1)
829	in_b(1) = 1 + njmppt(nowe+1)+nlcjt(nowe+1)-3
830
831	iw_b(2) = 1 + nimppt(noea+1)
832	ie_b(2) = 1 + nimppt(noea+1)+nlcit(noea+1)-3
833	is_b(2) = 1 + njmppt(noea+1)
834	in_b(2) = 1 + njmppt(noea+1)+nlcjt(noea+1)-3
835	ELSEIF(nbondi == 1) THEN
836	iw_b(1) = 1 + nimppt(nowe+1)
837	ie_b(1) = 1 + nimppt(nowe+1)+nlcit(nowe+1)-3
838	is_b(1) = 1 + njmppt(nowe+1)
839	in_b(1) = 1 + njmppt(nowe+1)+nlcjt(nowe+1)-3
840	ELSEIF(nbondi == -1) THEN
841	iw_b(2) = 1 + nimppt(noea+1)
842	ie_b(2) = 1 + nimppt(noea+1)+nlcit(noea+1)-3
843	is_b(2) = 1 + njmppt(noea+1)
844	in_b(2) = 1 + njmppt(noea+1)+nlcjt(noea+1)-3
845	ENDIF
846
847	IF(nbondj == 0) THEN
848	iw_b(3) = 1 + nimppt(noso+1)
849	ie_b(3) = 1 + nimppt(noso+1)+nlcit(noso+1)-3
850	is_b(3) = 1 + njmppt(noso+1)
851	in_b(3) = 1 + njmppt(noso+1)+nlcjt(noso+1)-3
852
853	iw_b(4) = 1 + nimppt(nono+1)
854	ie_b(4) = 1 + nimppt(nono+1)+nlcit(nono+1)-3
855	is_b(4) = 1 + njmppt(nono+1)
856	in_b(4) = 1 + njmppt(nono+1)+nlcjt(nono+1)-3
857	ELSEIF(nbondj == 1) THEN
858	iw_b(3) = 1 + nimppt(noso+1)
859	ie_b(3) = 1 + nimppt(noso+1)+nlcit(noso+1)-3
860	is_b(3) = 1 + njmppt(noso+1)
861	in_b(3) = 1 + njmppt(noso+1)+nlcjt(noso+1)-3
862	ELSEIF(nbondj == -1) THEN
863	iw_b(4) = 1 + nimppt(nono+1)
864	ie_b(4) = 1 + nimppt(nono+1)+nlcit(nono+1)-3
865	is_b(4) = 1 + njmppt(nono+1)
866	in_b(4) = 1 + njmppt(nono+1)+nlcjt(nono+1)-3
867	ENDIF
868
869	DO ib_bdy = 1, nb_bdy
870	DO igrd = 1, jpbgrd
871	icount = 0
872	icountr = 0
873	idx_bdy(ib_bdy)%nblen(igrd) = 0
874	idx_bdy(ib_bdy)%nblenrim(igrd) = 0
875	DO ib = 1, nblendta(igrd,ib_bdy)
876	! check that data is in correct order in file
877	ibm1 = MAX(1,ib-1)
878	IF(lwp) THEN ! Since all procs read global data only need to do this check on one proc...
879	IF( nbrdta(ib,igrd,ib_bdy) < nbrdta(ibm1,igrd,ib_bdy) ) THEN
880	CALL ctl_stop('bdy_segs : ERROR : boundary data in file must be defined ', &
881	& ' in order of distance from edge nbr A utility for re-ordering ', &
882	& ' boundary coordinates and data files exists in the TOOLS/OBC directory')
883	ENDIF
884	ENDIF
885	! check if point is in local domain
886	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
887	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino ) THEN
888	!
889	icount = icount + 1
890	!
891	IF( nbrdta(ib,igrd,ib_bdy) == 1 ) icountr = icountr+1
892	ENDIF
893	END DO
894	idx_bdy(ib_bdy)%nblenrim(igrd) = icountr !: length of rim boundary data on each proc
895	idx_bdy(ib_bdy)%nblen (igrd) = icount !: length of boundary data on each proc
896	END DO ! igrd
897
898	! Allocate index arrays for this boundary set
899	!--------------------------------------------
900	ilen1 = MAXVAL( idx_bdy(ib_bdy)%nblen(:) )
901	ALLOCATE( idx_bdy(ib_bdy)%nbi (ilen1,jpbgrd) , &
902	& idx_bdy(ib_bdy)%nbj (ilen1,jpbgrd) , &
903	& idx_bdy(ib_bdy)%nbr (ilen1,jpbgrd) , &
904	& idx_bdy(ib_bdy)%nbd (ilen1,jpbgrd) , &
905	& idx_bdy(ib_bdy)%nbdout(ilen1,jpbgrd) , &
906	& idx_bdy(ib_bdy)%nbmap (ilen1,jpbgrd) , &
907	& idx_bdy(ib_bdy)%nbw (ilen1,jpbgrd) , &
908	& idx_bdy(ib_bdy)%flagu (ilen1,jpbgrd) , &
909	& idx_bdy(ib_bdy)%flagv (ilen1,jpbgrd) )
910
911	! Dispatch mapping indices and discrete distances on each processor
912	! -----------------------------------------------------------------
913
914	com_east = 0
915	com_west = 0
916	com_south = 0
917	com_north = 0
918
919	com_east_b = 0
920	com_west_b = 0
921	com_south_b = 0
922	com_north_b = 0
923
924	DO igrd = 1, jpbgrd
925	icount = 0
926	! Loop on rimwidth to ensure outermost points come first in the local arrays.
927	DO ir=1, nn_rimwidth(ib_bdy)
928	DO ib = 1, nblendta(igrd,ib_bdy)
929	! check if point is in local domain and equals ir
930	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
931	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino .AND. &
932	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
933	!
934	icount = icount + 1
935
936	! Rather assume that boundary data indices are given on global domain
937	! TO BE DISCUSSED ?
938	! idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
939	! idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
940	idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
941	idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
942	! check if point has to be sent
943	ii = idx_bdy(ib_bdy)%nbi(icount,igrd)
944	ij = idx_bdy(ib_bdy)%nbj(icount,igrd)
945	if((com_east .ne. 1) .and. (ii == (nlci-1)) .and. (nbondi .le. 0)) then
946	com_east = 1
947	elseif((com_west .ne. 1) .and. (ii == 2) .and. (nbondi .ge. 0) .and. (nbondi .ne. 2)) then
948	com_west = 1
949	endif
950	if((com_south .ne. 1) .and. (ij == 2) .and. (nbondj .ge. 0) .and. (nbondj .ne. 2)) then
951	com_south = 1
952	elseif((com_north .ne. 1) .and. (ij == (nlcj-1)) .and. (nbondj .le. 0)) then
953	com_north = 1
954	endif
955	idx_bdy(ib_bdy)%nbr(icount,igrd) = nbrdta(ib,igrd,ib_bdy)
956	idx_bdy(ib_bdy)%nbmap(icount,igrd) = ib
957	ENDIF
958	! check if point has to be received from a neighbour
959	IF(nbondi == 0) THEN
960	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
961	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
962	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
963	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
964	if((com_west_b .ne. 1) .and. (ii == (nlcit(nowe+1)-1))) then
965	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
966	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
967	com_south = 1
968	elseif((ij == nlcjt(nowe+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
969	com_north = 1
970	endif
971	com_west_b = 1
972	endif
973	ENDIF
974	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
975	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
976	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
977	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
978	if((com_east_b .ne. 1) .and. (ii == 2)) then
979	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
980	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
981	com_south = 1
982	elseif((ij == nlcjt(noea+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
983	com_north = 1
984	endif
985	com_east_b = 1
986	endif
987	ENDIF
988	ELSEIF(nbondi == 1) THEN
989	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
990	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
991	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
992	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
993	if((com_west_b .ne. 1) .and. (ii == (nlcit(nowe+1)-1))) then
994	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
995	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
996	com_south = 1
997	elseif((ij == nlcjt(nowe+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
998	com_north = 1
999	endif
1000	com_west_b = 1
1001	endif
1002	ENDIF
1003	ELSEIF(nbondi == -1) THEN
1004	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
1005	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
1006	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1007	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
1008	if((com_east_b .ne. 1) .and. (ii == 2)) then
1009	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
1010	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
1011	com_south = 1
1012	elseif((ij == nlcjt(noea+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
1013	com_north = 1
1014	endif
1015	com_east_b = 1
1016	endif
1017	ENDIF
1018	ENDIF
1019	IF(nbondj == 0) THEN
1020	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1021	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1022	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1023	com_north_b = 1
1024	ENDIF
1025	IF(com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 &
1026	&.OR. nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1027	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1028	com_south_b = 1
1029	ENDIF
1030	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1031	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1032	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1033	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1034	if((com_south_b .ne. 1) .and. (ij == (nlcjt(noso+1)-1))) then
1035	com_south_b = 1
1036	endif
1037	ENDIF
1038	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1039	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1040	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1041	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1042	if((com_north_b .ne. 1) .and. (ij == 2)) then
1043	com_north_b = 1
1044	endif
1045	ENDIF
1046	ELSEIF(nbondj == 1) THEN
1047	IF( com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 .OR. &
1048	& nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1049	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1050	com_south_b = 1
1051	ENDIF
1052	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1053	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1054	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1055	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1056	if((com_south_b .ne. 1) .and. (ij == (nlcjt(noso+1)-1))) then
1057	com_south_b = 1
1058	endif
1059	ENDIF
1060	ELSEIF(nbondj == -1) THEN
1061	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1062	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1063	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1064	com_north_b = 1
1065	ENDIF
1066	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1067	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1068	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1069	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1070	if((com_north_b .ne. 1) .and. (ij == 2)) then
1071	com_north_b = 1
1072	endif
1073	ENDIF
1074	ENDIF
1075	ENDDO
1076	ENDDO
1077	ENDDO
1078
1079	! definition of the i- and j- direction local boundaries arrays used for sending the boundaries
1080	IF( (com_east == 1) .and. (com_west == 1) ) THEN ; nbondi_bdy(ib_bdy) = 0
1081	ELSEIF( (com_east == 1) .and. (com_west == 0) ) THEN ; nbondi_bdy(ib_bdy) = -1
1082	ELSEIF( (com_east == 0) .and. (com_west == 1) ) THEN ; nbondi_bdy(ib_bdy) = 1
1083	ENDIF
1084	IF( (com_north == 1) .and. (com_south == 1) ) THEN ; nbondj_bdy(ib_bdy) = 0
1085	ELSEIF( (com_north == 1) .and. (com_south == 0) ) THEN ; nbondj_bdy(ib_bdy) = -1
1086	ELSEIF( (com_north == 0) .and. (com_south == 1) ) THEN ; nbondj_bdy(ib_bdy) = 1
1087	ENDIF
1088
1089	! definition of the i- and j- direction local boundaries arrays used for receiving the boundaries
1090	IF( (com_east_b == 1) .and. (com_west_b == 1) ) THEN ; nbondi_bdy_b(ib_bdy) = 0
1091	ELSEIF( (com_east_b == 1) .and. (com_west_b == 0) ) THEN ; nbondi_bdy_b(ib_bdy) = -1
1092	ELSEIF( (com_east_b == 0) .and. (com_west_b == 1) ) THEN ; nbondi_bdy_b(ib_bdy) = 1
1093	ENDIF
1094	IF( (com_north_b == 1) .and. (com_south_b == 1) ) THEN ; nbondj_bdy_b(ib_bdy) = 0
1095	ELSEIF( (com_north_b == 1) .and. (com_south_b == 0) ) THEN ; nbondj_bdy_b(ib_bdy) = -1
1096	ELSEIF( (com_north_b == 0) .and. (com_south_b == 1) ) THEN ; nbondj_bdy_b(ib_bdy) = 1
1097	ENDIF
1098
1099	! Compute rim weights for FRS scheme
1100	! ----------------------------------
1101	DO igrd = 1, jpbgrd
1102	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1103	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1104	idx_bdy(ib_bdy)%nbw(ib,igrd) = 1.- TANH( REAL( nbr - 1 ) *0.5 ) ! tanh formulation
1105	! idx_bdy(ib_bdy)%nbw(ib,igrd) = (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))**2. ! quadratic
1106	! idx_bdy(ib_bdy)%nbw(ib,igrd) = REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)) ! linear
1107	END DO
1108	END DO
1109
1110	! Compute damping coefficients
1111	! ----------------------------
1112	DO igrd = 1, jpbgrd
1113	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1114	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1115	idx_bdy(ib_bdy)%nbd(ib,igrd) = 1. / ( rn_time_dmp(ib_bdy) * rday ) &
1116	& (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))*2. ! quadratic
1117	idx_bdy(ib_bdy)%nbdout(ib,igrd) = 1. / ( rn_time_dmp_out(ib_bdy) * rday ) &
1118	& (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))*2. ! quadratic
1119	END DO
1120	END DO
1121
1122	END DO
1123
1124	! ------------------------------------------------------
1125	! Initialise masks and find normal/tangential directions
1126	! ------------------------------------------------------
1127
1128	! Read global 2D mask at T-points: bdytmask
1129	! -----------------------------------------
1130	! bdytmask = 1 on the computational domain AND on open boundaries
1131	! = 0 elsewhere
1132
1133	bdytmask(:,:) = ssmask(:,:)
1134
1135	IF( ln_mask_file ) THEN
1136	CALL iom_open( cn_mask_file, inum )
1137	CALL iom_get ( inum, jpdom_data, 'bdy_msk', bdytmask(:,:) )
1138	CALL iom_close( inum )
1139
1140	! Derive mask on U and V grid from mask on T grid
1141	bdyumask(:,:) = 0._wp
1142	bdyvmask(:,:) = 0._wp
1143	DO ij=1, jpjm1
1144	DO ii=1, jpim1
1145	bdyumask(ii,ij) = bdytmask(ii,ij) * bdytmask(ii+1, ij )
1146	bdyvmask(ii,ij) = bdytmask(ii,ij) * bdytmask(ii ,ij+1)
1147	END DO
1148	END DO
1149	CALL lbc_lnk_multi( bdyumask, 'U', 1., bdyvmask, 'V', 1. ) ! Lateral boundary cond.
1150	ENDIF ! ln_mask_file=.TRUE.
1151
1152	IF( .NOT.ln_mask_file ) THEN
1153	! If .not. ln_mask_file then we need to derive mask on U and V grid from mask on T grid here.
1154	bdyumask(:,:) = 0._wp
1155	bdyvmask(:,:) = 0._wp
1156	DO ij = 1, jpjm1
1157	DO ii = 1, jpim1
1158	bdyumask(ii,ij) = bdytmask(ii,ij) * bdytmask(ii+1, ij )
1159	bdyvmask(ii,ij) = bdytmask(ii,ij) * bdytmask(ii ,ij+1)
1160	END DO
1161	END DO
1162	CALL lbc_lnk_multi( bdyumask, 'U', 1. , bdyvmask, 'V', 1. ) ! Lateral boundary cond.
1163	ENDIF
1164
1165	! bdy masks are now set to zero on boundary points:
1166	!
1167	igrd = 1
1168	DO ib_bdy = 1, nb_bdy
1169	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1170	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1171	END DO
1172	END DO
1173	!
1174	igrd = 2
1175	DO ib_bdy = 1, nb_bdy
1176	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1177	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1178	END DO
1179	END DO
1180	!
1181	igrd = 3
1182	DO ib_bdy = 1, nb_bdy
1183	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1184	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1185	END DO
1186	END DO
1187
1188	! For the flagu/flagv calculation below we require a version of fmask without
1189	! the land boundary condition (shlat) included:
1190	DO ij = 2, jpjm1
1191	DO ii = 2, jpim1
1192	zfmask(ii,ij) = tmask(ii,ij ,1) * tmask(ii+1,ij ,1) &
1193	& * tmask(ii,ij+1,1) * tmask(ii+1,ij+1,1)
1194	END DO
1195	END DO
1196
1197	! Lateral boundary conditions
1198	CALL lbc_lnk( zfmask, 'F', 1. )
1199	CALL lbc_lnk_multi( bdyumask, 'U', 1. , bdyvmask, 'V', 1., bdytmask, 'T', 1. )
1200	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1201
1202	idx_bdy(ib_bdy)%flagu(:,:) = 0._wp
1203	idx_bdy(ib_bdy)%flagv(:,:) = 0._wp
1204	icount = 0
1205
1206	! Calculate relationship of U direction to the local orientation of the boundary
1207	! flagu = -1 : u component is normal to the dynamical boundary and its direction is outward
1208	! flagu = 0 : u is tangential
1209	! flagu = 1 : u is normal to the boundary and is direction is inward
1210
1211	DO igrd = 1, jpbgrd
1212	SELECT CASE( igrd )
1213	CASE( 1 ) ; pmask => umask (:,:,1) ; i_offset = 0
1214	CASE( 2 ) ; pmask => bdytmask(:,:) ; i_offset = 1
1215	CASE( 3 ) ; pmask => zfmask (:,:) ; i_offset = 0
1216	END SELECT
1217	icount = 0
1218	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1219	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1220	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1221	zefl = pmask(nbi+i_offset-1,nbj)
1222	zwfl = pmask(nbi+i_offset,nbj)
1223	! This error check only works if you are using the bdyXmask arrays
1224	IF( i_offset == 1 .and. zefl + zwfl == 2 ) THEN
1225	icount = icount + 1
1226	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(nbi),mjg(nbj)
1227	ELSE
1228	idx_bdy(ib_bdy)%flagu(ib,igrd) = -zefl + zwfl
1229	ENDIF
1230	END DO
1231	IF( icount /= 0 ) THEN
1232	IF(lwp) WRITE(numout,*)
1233	IF(lwp) WRITE(numout,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1234	' are not boundary points (flagu calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1235	IF(lwp) WRITE(numout,*) ' ========== '
1236	IF(lwp) WRITE(numout,*)
1237	nstop = nstop + 1
1238	ENDIF
1239	END DO
1240
1241	! Calculate relationship of V direction to the local orientation of the boundary
1242	! flagv = -1 : v component is normal to the dynamical boundary but its direction is outward
1243	! flagv = 0 : v is tangential
1244	! flagv = 1 : v is normal to the boundary and is direction is inward
1245
1246	DO igrd = 1, jpbgrd
1247	SELECT CASE( igrd )
1248	CASE( 1 ) ; pmask => vmask (:,:,1) ; j_offset = 0
1249	CASE( 2 ) ; pmask => zfmask(:,:) ; j_offset = 0
1250	CASE( 3 ) ; pmask => bdytmask ; j_offset = 1
1251	END SELECT
1252	icount = 0
1253	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1254	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1255	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1256	znfl = pmask(nbi,nbj+j_offset-1)
1257	zsfl = pmask(nbi,nbj+j_offset )
1258	! This error check only works if you are using the bdyXmask arrays
1259	IF( j_offset == 1 .and. znfl + zsfl == 2 ) THEN
1260	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(nbi),mjg(nbj)
1261	icount = icount + 1
1262	ELSE
1263	idx_bdy(ib_bdy)%flagv(ib,igrd) = -znfl + zsfl
1264	END IF
1265	END DO
1266	IF( icount /= 0 ) THEN
1267	IF(lwp) WRITE(numout,*)
1268	IF(lwp) WRITE(numout,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1269	' are not boundary points (flagv calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1270	IF(lwp) WRITE(numout,*) ' ========== '
1271	IF(lwp) WRITE(numout,*)
1272	nstop = nstop + 1
1273	ENDIF
1274	END DO
1275	!
1276	END DO
1277
1278	! Compute total lateral surface for volume correction:
1279	! ----------------------------------------------------
1280	! JC: this must be done at each time step with non-linear free surface
1281	bdysurftot = 0._wp
1282	IF( ln_vol ) THEN
1283	igrd = 2 ! Lateral surface at U-points
1284	DO ib_bdy = 1, nb_bdy
1285	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1286	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1287	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1288	flagu => idx_bdy(ib_bdy)%flagu(ib,igrd)
1289	bdysurftot = bdysurftot + hu_n (nbi , nbj) &
1290	& * e2u (nbi , nbj) * ABS( flagu ) &
1291	& * tmask_i(nbi , nbj) &
1292	& * tmask_i(nbi+1, nbj)
1293	END DO
1294	END DO
1295
1296	igrd=3 ! Add lateral surface at V-points
1297	DO ib_bdy = 1, nb_bdy
1298	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1299	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1300	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1301	flagv => idx_bdy(ib_bdy)%flagv(ib,igrd)
1302	bdysurftot = bdysurftot + hv_n (nbi, nbj ) &
1303	& * e1v (nbi, nbj ) * ABS( flagv ) &
1304	& * tmask_i(nbi, nbj ) &
1305	& * tmask_i(nbi, nbj+1)
1306	END DO
1307	END DO
1308	!
1309	IF( lk_mpp ) CALL mpp_sum( bdysurftot ) ! sum over the global domain
1310	END IF
1311	!
1312	! Tidy up
1313	!--------
1314	IF( nb_bdy>0 ) DEALLOCATE( nbidta, nbjdta, nbrdta )
1315	!
1316	IF( nn_timing == 1 ) CALL timing_stop('bdy_segs')
1317	!
1318	END SUBROUTINE bdy_segs
1319
1320
1321	SUBROUTINE bdy_ctl_seg
1322	!!----------------------------------------------------------------------
1323	!! * ROUTINE bdy_ctl_seg *
1324	!!
1325	!! ** Purpose : Check straight open boundary segments location
1326	!!
1327	!! ** Method : - Look for open boundary corners
1328	!! - Check that segments start or end on land
1329	!!----------------------------------------------------------------------
1330	INTEGER :: ib, ib1, ib2, ji ,jj, itest
1331	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1332	REAL(wp), DIMENSION(2) :: ztestmask
1333	!!----------------------------------------------------------------------
1334	!
1335	IF (lwp) WRITE(numout,*) ' '
1336	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1337	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1338	!
1339	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1340	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1341	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1342	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1343	! 1. Check bounds
1344	!----------------
1345	DO ib = 1, nbdysegn
1346	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1347	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1348	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1349	IF (jpindt(ib).ge.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1350	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1351	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1352	END DO
1353	!
1354	DO ib = 1, nbdysegs
1355	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1356	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1357	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1358	IF (jpisdt(ib).ge.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1359	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1360	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1361	END DO
1362	!
1363	DO ib = 1, nbdysege
1364	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1365	IF ((jpieob(ib).ge.jpiglo-1).or.&
1366	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1367	IF (jpjedt(ib).ge.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1368	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1369	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1370	END DO
1371	!
1372	DO ib = 1, nbdysegw
1373	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1374	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1375	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1376	IF (jpjwdt(ib).ge.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1377	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1378	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1379	ENDDO
1380	!
1381	!
1382	! 2. Look for segment crossings
1383	!------------------------------
1384	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1385	!
1386	itest = 0 ! corner number
1387	!
1388	! flag to detect if start or end of open boundary belongs to a corner
1389	! if not (=0), it must be on land.
1390	! if a corner is detected, save bdy package number for further tests
1391	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1392	! South/West crossings
1393	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1394	DO ib1 = 1, nbdysegw
1395	DO ib2 = 1, nbdysegs
1396	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1397	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1398	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1399	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1400	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1401	! We have a possible South-West corner
1402	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1403	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1404	icornw(ib1,1) = npckgs(ib2)
1405	icorns(ib2,1) = npckgw(ib1)
1406	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1407	IF(lwp) WRITE(numout,*)
1408	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1409	& jpisft(ib2), jpjwft(ib1)
1410	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1411	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1412	& ' and South segment: ',npckgs(ib2)
1413	IF(lwp) WRITE(numout,*)
1414	nstop = nstop + 1
1415	ELSE
1416	IF(lwp) WRITE(numout,*)
1417	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and West Open boundary indices'
1418	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1419	& ' and South segment: ',npckgs(ib2)
1420	IF(lwp) WRITE(numout,*)
1421	nstop = nstop+1
1422	END IF
1423	END IF
1424	END DO
1425	END DO
1426	END IF
1427	!
1428	! South/East crossings
1429	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1430	DO ib1 = 1, nbdysege
1431	DO ib2 = 1, nbdysegs
1432	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1433	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1434	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1435	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1436	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1437	! We have a possible South-East corner
1438	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1439	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1440	icorne(ib1,1) = npckgs(ib2)
1441	icorns(ib2,2) = npckge(ib1)
1442	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1443	IF(lwp) WRITE(numout,*)
1444	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1445	& jpisdt(ib2), jpjeft(ib1)
1446	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1447	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1448	& ' and South segment: ',npckgs(ib2)
1449	IF(lwp) WRITE(numout,*)
1450	nstop = nstop + 1
1451	ELSE
1452	IF(lwp) WRITE(numout,*)
1453	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and East Open boundary indices'
1454	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1455	& ' and South segment: ',npckgs(ib2)
1456	IF(lwp) WRITE(numout,*)
1457	nstop = nstop + 1
1458	END IF
1459	END IF
1460	END DO
1461	END DO
1462	END IF
1463	!
1464	! North/West crossings
1465	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1466	DO ib1 = 1, nbdysegw
1467	DO ib2 = 1, nbdysegn
1468	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1469	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1470	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1471	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1472	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1473	! We have a possible North-West corner
1474	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1475	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1476	icornw(ib1,2) = npckgn(ib2)
1477	icornn(ib2,1) = npckgw(ib1)
1478	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1479	IF(lwp) WRITE(numout,*)
1480	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1481	& jpinft(ib2), jpjwdt(ib1)
1482	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1483	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1484	& ' and North segment: ',npckgn(ib2)
1485	IF(lwp) WRITE(numout,*)
1486	nstop = nstop + 1
1487	ELSE
1488	IF(lwp) WRITE(numout,*)
1489	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and West Open boundary indices'
1490	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1491	& ' and North segment: ',npckgn(ib2)
1492	IF(lwp) WRITE(numout,*)
1493	nstop = nstop + 1
1494	END IF
1495	END IF
1496	END DO
1497	END DO
1498	END IF
1499	!
1500	! North/East crossings
1501	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1502	DO ib1 = 1, nbdysege
1503	DO ib2 = 1, nbdysegn
1504	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1505	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1506	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1507	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1508	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1509	! We have a possible North-East corner
1510	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1511	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1512	icorne(ib1,2) = npckgn(ib2)
1513	icornn(ib2,2) = npckge(ib1)
1514	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1515	IF(lwp) WRITE(numout,*)
1516	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1517	& jpindt(ib2), jpjedt(ib1)
1518	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1519	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1520	& ' and North segment: ',npckgn(ib2)
1521	IF(lwp) WRITE(numout,*)
1522	nstop = nstop + 1
1523	ELSE
1524	IF(lwp) WRITE(numout,*)
1525	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and East Open boundary indices'
1526	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1527	& ' and North segment: ',npckgn(ib2)
1528	IF(lwp) WRITE(numout,*)
1529	nstop = nstop + 1
1530	END IF
1531	END IF
1532	END DO
1533	END DO
1534	END IF
1535	!
1536	! 3. Check if segment extremities are on land
1537	!--------------------------------------------
1538	!
1539	! West segments
1540	DO ib = 1, nbdysegw
1541	! get mask at boundary extremities:
1542	ztestmask(1:2)=0.
1543	DO ji = 1, jpi
1544	DO jj = 1, jpj
1545	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1546	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1547	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1548	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1549	END DO
1550	END DO
1551	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1552
1553	IF (ztestmask(1)==1) THEN
1554	IF (icornw(ib,1)==0) THEN
1555	IF(lwp) WRITE(numout,*)
1556	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1557	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1558	IF(lwp) WRITE(numout,*)
1559	nstop = nstop + 1
1560	ELSE
1561	! This is a corner
1562	IF(lwp) WRITE(numout,*) 'Found a South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1563	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1564	itest=itest+1
1565	ENDIF
1566	ENDIF
1567	IF (ztestmask(2)==1) THEN
1568	IF (icornw(ib,2)==0) THEN
1569	IF(lwp) WRITE(numout,*)
1570	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1571	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1572	IF(lwp) WRITE(numout,*)
1573	nstop = nstop + 1
1574	ELSE
1575	! This is a corner
1576	IF(lwp) WRITE(numout,*) 'Found a North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1577	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1578	itest=itest+1
1579	ENDIF
1580	ENDIF
1581	END DO
1582	!
1583	! East segments
1584	DO ib = 1, nbdysege
1585	! get mask at boundary extremities:
1586	ztestmask(1:2)=0.
1587	DO ji = 1, jpi
1588	DO jj = 1, jpj
1589	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1590	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1591	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1592	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1593	END DO
1594	END DO
1595	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1596
1597	IF (ztestmask(1)==1) THEN
1598	IF (icorne(ib,1)==0) THEN
1599	IF(lwp) WRITE(numout,*)
1600	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1601	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1602	IF(lwp) WRITE(numout,*)
1603	nstop = nstop + 1
1604	ELSE
1605	! This is a corner
1606	IF(lwp) WRITE(numout,*) 'Found a South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1607	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1608	itest=itest+1
1609	ENDIF
1610	ENDIF
1611	IF (ztestmask(2)==1) THEN
1612	IF (icorne(ib,2)==0) THEN
1613	IF(lwp) WRITE(numout,*)
1614	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1615	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1616	IF(lwp) WRITE(numout,*)
1617	nstop = nstop + 1
1618	ELSE
1619	! This is a corner
1620	IF(lwp) WRITE(numout,*) 'Found a North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1621	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1622	itest=itest+1
1623	ENDIF
1624	ENDIF
1625	END DO
1626	!
1627	! South segments
1628	DO ib = 1, nbdysegs
1629	! get mask at boundary extremities:
1630	ztestmask(1:2)=0.
1631	DO ji = 1, jpi
1632	DO jj = 1, jpj
1633	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1634	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1635	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1636	& ((ji + nimpp - 1) == jpisft(ib))) ztestmask(2)=tmask(ji,jj,1)
1637	END DO
1638	END DO
1639	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1640
1641	IF ((ztestmask(1)==1).AND.(icorns(ib,1)==0)) THEN
1642	IF(lwp) WRITE(numout,*)
1643	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1644	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1645	IF(lwp) WRITE(numout,*)
1646	nstop = nstop + 1
1647	ENDIF
1648	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1649	IF(lwp) WRITE(numout,*)
1650	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1651	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1652	IF(lwp) WRITE(numout,*)
1653	nstop = nstop + 1
1654	ENDIF
1655	END DO
1656	!
1657	! North segments
1658	DO ib = 1, nbdysegn
1659	! get mask at boundary extremities:
1660	ztestmask(1:2)=0.
1661	DO ji = 1, jpi
1662	DO jj = 1, jpj
1663	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1664	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1665	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1666	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1667	END DO
1668	END DO
1669	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1670
1671	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1672	IF(lwp) WRITE(numout,*)
1673	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1674	IF(lwp) WRITE(numout,*) ' ========== does not start on land'
1675	IF(lwp) WRITE(numout,*)
1676	nstop = nstop + 1
1677	ENDIF
1678	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1679	IF(lwp) WRITE(numout,*)
1680	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1681	IF(lwp) WRITE(numout,*) ' ========== does not end on land'
1682	IF(lwp) WRITE(numout,*)
1683	nstop = nstop + 1
1684	ENDIF
1685	END DO
1686	!
1687	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1688	!
1689	! Other tests TBD:
1690	! segments completly on land
1691	! optimized open boundary array length according to landmask
1692	! Nudging layers that overlap with interior domain
1693	!
1694	END SUBROUTINE bdy_ctl_seg
1695
1696
1697	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1698	!!----------------------------------------------------------------------
1699	!! * ROUTINE bdy_ctl_corn *
1700	!!
1701	!! ** Purpose : Check numerical schemes consistency between
1702	!! segments having a common corner
1703	!!
1704	!! ** Method :
1705	!!----------------------------------------------------------------------
1706	INTEGER, INTENT(in) :: ib1, ib2
1707	INTEGER :: itest
1708	!!----------------------------------------------------------------------
1709	itest = 0
1710
1711	IF( cn_dyn2d(ib1) /= cn_dyn2d(ib2) ) itest = itest + 1
1712	IF( cn_dyn3d(ib1) /= cn_dyn3d(ib2) ) itest = itest + 1
1713	IF( cn_tra (ib1) /= cn_tra (ib2) ) itest = itest + 1
1714	!
1715	IF( nn_dyn2d_dta(ib1) /= nn_dyn2d_dta(ib2) ) itest = itest + 1
1716	IF( nn_dyn3d_dta(ib1) /= nn_dyn3d_dta(ib2) ) itest = itest + 1
1717	IF( nn_tra_dta (ib1) /= nn_tra_dta (ib2) ) itest = itest + 1
1718	!
1719	IF( nn_rimwidth(ib1) /= nn_rimwidth(ib2) ) itest = itest + 1
1720	!
1721	IF( itest>0 ) THEN
1722	IF(lwp) WRITE(numout,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1723	IF(lwp) WRITE(numout,*) ' ========== have different open bdy schemes'
1724	IF(lwp) WRITE(numout,*)
1725	nstop = nstop + 1
1726	ENDIF
1727	!
1728	END SUBROUTINE bdy_ctl_corn
1729
1730	!!=================================================================================
1731	END MODULE bdyini

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