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bdyini.F90 in NEMO/branches/2019/dev_r10984_HPC-13_IRRMANN_BDY_optimization/src/OCE/BDY – NEMO

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source: NEMO/branches/2019/dev_r10984_HPC-13_IRRMANN_BDY_optimization/src/OCE/BDY/bdyini.F90 @ 11048

Last change on this file since 11048 was 11048, checked in by girrmann, 5 years ago
dev_r10984_HPC-13 : Step 1, boundary is now detected all over the local domain, this does not change the result. Improve bdy treatment for bdy_rnf in bdytra.F90, this changes the result when keyword runoff is specified in namelist
Property svn:keywords set to `Id`
File size: 82.6 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
32	IMPLICIT NONE
33	PRIVATE
34
35	PUBLIC bdy_init ! routine called in nemo_init
36
37	INTEGER, PARAMETER :: jp_nseg = 100 !
38	INTEGER, PARAMETER :: nrimmax = 20 ! maximum rimwidth in structured
39	INTEGER :: nde = 1 ! domain extended in the halo to deal with bondaries
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/OCE 4.0 , NEMO Consortium (2018)
49	!! $Id$
50	!! Software governed by the CeCILL license (see ./LICENSE)
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, nn_ice_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	! ------------------------
78	! Read namelist parameters
79	! ------------------------
80	REWIND( numnam_ref ) ! Namelist nambdy in reference namelist :Unstructured open boundaries
81	READ ( numnam_ref, nambdy, IOSTAT = ios, ERR = 901)
82	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in reference namelist', lwp )
83	REWIND( numnam_cfg ) ! Namelist nambdy in configuration namelist :Unstructured open boundaries
84	READ ( numnam_cfg, nambdy, IOSTAT = ios, ERR = 902 )
85	902 IF( ios > 0 ) CALL ctl_nam ( ios , 'nambdy in configuration namelist', lwp )
86	IF(lwm) WRITE ( numond, nambdy )
87
88	IF( .NOT. Agrif_Root() ) ln_bdy = .FALSE. ! forced for Agrif children
89
90	! -----------------------------------------
91	! unstructured open boundaries use control
92	! -----------------------------------------
93	IF ( ln_bdy ) THEN
94	IF(lwp) WRITE(numout,*)
95	IF(lwp) WRITE(numout,*) 'bdy_init : initialization of open boundaries'
96	IF(lwp) WRITE(numout,*) '~~~~~~~~'
97	!
98	! Open boundaries definition (arrays and masks)
99	CALL bdy_segs
100	!
101	! Open boundaries initialisation of external data arrays
102	CALL bdy_dta_init
103	!
104	! Open boundaries initialisation of tidal harmonic forcing
105	IF( ln_tide ) CALL bdytide_init
106	!
107	ELSE
108	IF(lwp) WRITE(numout,*)
109	IF(lwp) WRITE(numout,*) 'bdy_init : open boundaries not used (ln_bdy = F)'
110	IF(lwp) WRITE(numout,*) '~~~~~~~~'
111	!
112	ENDIF
113	!
114	END SUBROUTINE bdy_init
115
116
117	SUBROUTINE bdy_segs
118	!!----------------------------------------------------------------------
119	!! * ROUTINE bdy_init *
120	!!
121	!! ** Purpose : Definition of unstructured open boundaries.
122	!!
123	!! ** Method : Read initialization arrays (mask, indices) to identify
124	!! an unstructured open boundary
125	!!
126	!! ** Input : bdy_init.nc, input file for unstructured open boundaries
127	!!----------------------------------------------------------------------
128	INTEGER :: ib_bdy, ii, ij, ik, igrd, ib, ir, iseg ! dummy loop indices
129	INTEGER :: icount, icountr, ibr_max, ilen1, ibm1 ! local integers
130	INTEGER :: iwe, ies, iso, ino, inum, id_dummy ! - -
131	INTEGER :: igrd_start, igrd_end, jpbdta ! - -
132	INTEGER :: jpbdtau, jpbdtas ! - -
133	INTEGER :: ib_bdy1, ib_bdy2, ib1, ib2 ! - -
134	INTEGER :: i_offset, j_offset, inbdy ! - -
135	INTEGER , POINTER :: nbi, nbj, nbr ! short cuts
136	REAL(wp), POINTER, DIMENSION(:,:) :: pmask ! pointer to 2D mask fields
137	REAL(wp) :: zefl, zwfl, znfl, zsfl ! local scalars
138	INTEGER, DIMENSION (2) :: kdimsz
139	INTEGER, DIMENSION(jpbgrd,jp_bdy) :: nblendta ! Length of index arrays
140	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbidta, nbjdta ! Index arrays: i and j indices of bdy dta
141	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbrdta ! Discrete distance from rim points
142	CHARACTER(LEN=1),DIMENSION(jpbgrd) :: cgrid
143	INTEGER :: com_east, com_west, com_south, com_north, jpk_max ! Flags for boundaries sending
144	INTEGER :: com_east_b, com_west_b, com_south_b, com_north_b ! Flags for boundaries receiving
145	INTEGER :: iw_b(4), ie_b(4), is_b(4), in_b(4) ! Arrays for neighbours coordinates
146	REAL(wp), TARGET, DIMENSION(jpi,jpj) :: zfmask ! temporary fmask array excluding coastal boundary condition (shlat)
147	REAL(wp) , DIMENSION(jpi,jpj) :: ztmp
148	LOGICAL :: llnobdy, llsobdy, lleabdy, llwebdy ! local logicals
149	!!
150	CHARACTER(LEN=1) :: ctypebdy ! - -
151	INTEGER :: nbdyind, nbdybeg, nbdyend
152	!!
153	NAMELIST/nambdy_index/ ctypebdy, nbdyind, nbdybeg, nbdyend
154	INTEGER :: ios ! Local integer output status for namelist read
155	!!----------------------------------------------------------------------
156	!
157	cgrid = (/'t','u','v'/)
158
159	! -----------------------------------------
160	! Check and write out namelist parameters
161	! -----------------------------------------
162	IF( jperio /= 0 ) CALL ctl_stop( 'bdy_segs: Cyclic or symmetric,', &
163	& ' and general open boundary condition are not compatible' )
164
165	IF( nb_bdy == 0 ) THEN
166	IF(lwp) WRITE(numout,*) 'nb_bdy = 0, NO OPEN BOUNDARIES APPLIED.'
167	ELSE
168	IF(lwp) WRITE(numout,*) 'Number of open boundary sets : ', nb_bdy
169	ENDIF
170
171	DO ib_bdy = 1,nb_bdy
172	IF(lwp) WRITE(numout,*) ' '
173	IF(lwp) WRITE(numout,*) '------ Open boundary data set ',ib_bdy,'------'
174
175	IF( ln_coords_file(ib_bdy) ) THEN
176	IF(lwp) WRITE(numout,*) 'Boundary definition read from file '//TRIM(cn_coords_file(ib_bdy))
177	ELSE
178	IF(lwp) WRITE(numout,*) 'Boundary defined in namelist.'
179	ENDIF
180	IF(lwp) WRITE(numout,*)
181
182	IF(lwp) WRITE(numout,*) 'Boundary conditions for barotropic solution: '
183	SELECT CASE( cn_dyn2d(ib_bdy) )
184	CASE( 'none' )
185	IF(lwp) WRITE(numout,*) ' no open boundary condition'
186	dta_bdy(ib_bdy)%ll_ssh = .false.
187	dta_bdy(ib_bdy)%ll_u2d = .false.
188	dta_bdy(ib_bdy)%ll_v2d = .false.
189	CASE( 'frs' )
190	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
191	dta_bdy(ib_bdy)%ll_ssh = .false.
192	dta_bdy(ib_bdy)%ll_u2d = .true.
193	dta_bdy(ib_bdy)%ll_v2d = .true.
194	CASE( 'flather' )
195	IF(lwp) WRITE(numout,*) ' Flather radiation condition'
196	dta_bdy(ib_bdy)%ll_ssh = .true.
197	dta_bdy(ib_bdy)%ll_u2d = .true.
198	dta_bdy(ib_bdy)%ll_v2d = .true.
199	CASE( 'orlanski' )
200	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
201	dta_bdy(ib_bdy)%ll_ssh = .false.
202	dta_bdy(ib_bdy)%ll_u2d = .true.
203	dta_bdy(ib_bdy)%ll_v2d = .true.
204	CASE( 'orlanski_npo' )
205	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
206	dta_bdy(ib_bdy)%ll_ssh = .false.
207	dta_bdy(ib_bdy)%ll_u2d = .true.
208	dta_bdy(ib_bdy)%ll_v2d = .true.
209	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn2d' )
210	END SELECT
211	IF( cn_dyn2d(ib_bdy) /= 'none' ) THEN
212	SELECT CASE( nn_dyn2d_dta(ib_bdy) ) !
213	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
214	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
215	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' tidal harmonic forcing taken from file'
216	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' boundary data AND tidal harmonic forcing taken from files'
217	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn2d_dta must be between 0 and 3' )
218	END SELECT
219	IF (( nn_dyn2d_dta(ib_bdy) .ge. 2 ).AND.(.NOT.ln_tide)) THEN
220	CALL ctl_stop( 'You must activate with ln_tide to add tidal forcing at open boundaries' )
221	ENDIF
222	ENDIF
223	IF(lwp) WRITE(numout,*)
224
225	IF(lwp) WRITE(numout,*) 'Boundary conditions for baroclinic velocities: '
226	SELECT CASE( cn_dyn3d(ib_bdy) )
227	CASE('none')
228	IF(lwp) WRITE(numout,*) ' no open boundary condition'
229	dta_bdy(ib_bdy)%ll_u3d = .false.
230	dta_bdy(ib_bdy)%ll_v3d = .false.
231	CASE('frs')
232	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
233	dta_bdy(ib_bdy)%ll_u3d = .true.
234	dta_bdy(ib_bdy)%ll_v3d = .true.
235	CASE('specified')
236	IF(lwp) WRITE(numout,*) ' Specified value'
237	dta_bdy(ib_bdy)%ll_u3d = .true.
238	dta_bdy(ib_bdy)%ll_v3d = .true.
239	CASE('neumann')
240	IF(lwp) WRITE(numout,*) ' Neumann conditions'
241	dta_bdy(ib_bdy)%ll_u3d = .false.
242	dta_bdy(ib_bdy)%ll_v3d = .false.
243	CASE('zerograd')
244	IF(lwp) WRITE(numout,*) ' Zero gradient for baroclinic velocities'
245	dta_bdy(ib_bdy)%ll_u3d = .false.
246	dta_bdy(ib_bdy)%ll_v3d = .false.
247	CASE('zero')
248	IF(lwp) WRITE(numout,*) ' Zero baroclinic velocities (runoff case)'
249	dta_bdy(ib_bdy)%ll_u3d = .false.
250	dta_bdy(ib_bdy)%ll_v3d = .false.
251	CASE('orlanski')
252	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
253	dta_bdy(ib_bdy)%ll_u3d = .true.
254	dta_bdy(ib_bdy)%ll_v3d = .true.
255	CASE('orlanski_npo')
256	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
257	dta_bdy(ib_bdy)%ll_u3d = .true.
258	dta_bdy(ib_bdy)%ll_v3d = .true.
259	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn3d' )
260	END SELECT
261	IF( cn_dyn3d(ib_bdy) /= 'none' ) THEN
262	SELECT CASE( nn_dyn3d_dta(ib_bdy) ) !
263	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
264	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
265	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn3d_dta must be 0 or 1' )
266	END SELECT
267	ENDIF
268
269	IF ( ln_dyn3d_dmp(ib_bdy) ) THEN
270	IF ( cn_dyn3d(ib_bdy) == 'none' ) THEN
271	IF(lwp) WRITE(numout,*) 'No open boundary condition for baroclinic velocities: ln_dyn3d_dmp is set to .false.'
272	ln_dyn3d_dmp(ib_bdy)=.false.
273	ELSEIF ( cn_dyn3d(ib_bdy) == 'frs' ) THEN
274	CALL ctl_stop( 'Use FRS OR relaxation' )
275	ELSE
276	IF(lwp) WRITE(numout,*) ' + baroclinic velocities relaxation zone'
277	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
278	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
279	dta_bdy(ib_bdy)%ll_u3d = .true.
280	dta_bdy(ib_bdy)%ll_v3d = .true.
281	ENDIF
282	ELSE
283	IF(lwp) WRITE(numout,*) ' NO relaxation on baroclinic velocities'
284	ENDIF
285	IF(lwp) WRITE(numout,*)
286
287	IF(lwp) WRITE(numout,*) 'Boundary conditions for temperature and salinity: '
288	SELECT CASE( cn_tra(ib_bdy) )
289	CASE('none')
290	IF(lwp) WRITE(numout,*) ' no open boundary condition'
291	dta_bdy(ib_bdy)%ll_tem = .false.
292	dta_bdy(ib_bdy)%ll_sal = .false.
293	CASE('frs')
294	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
295	dta_bdy(ib_bdy)%ll_tem = .true.
296	dta_bdy(ib_bdy)%ll_sal = .true.
297	CASE('specified')
298	IF(lwp) WRITE(numout,*) ' Specified value'
299	dta_bdy(ib_bdy)%ll_tem = .true.
300	dta_bdy(ib_bdy)%ll_sal = .true.
301	CASE('neumann')
302	IF(lwp) WRITE(numout,*) ' Neumann conditions'
303	dta_bdy(ib_bdy)%ll_tem = .false.
304	dta_bdy(ib_bdy)%ll_sal = .false.
305	CASE('runoff')
306	IF(lwp) WRITE(numout,*) ' Runoff conditions : Neumann for T and specified to 0.1 for salinity'
307	dta_bdy(ib_bdy)%ll_tem = .false.
308	dta_bdy(ib_bdy)%ll_sal = .false.
309	CASE('orlanski')
310	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
311	dta_bdy(ib_bdy)%ll_tem = .true.
312	dta_bdy(ib_bdy)%ll_sal = .true.
313	CASE('orlanski_npo')
314	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
315	dta_bdy(ib_bdy)%ll_tem = .true.
316	dta_bdy(ib_bdy)%ll_sal = .true.
317	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_tra' )
318	END SELECT
319	IF( cn_tra(ib_bdy) /= 'none' ) THEN
320	SELECT CASE( nn_tra_dta(ib_bdy) ) !
321	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
322	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
323	CASE DEFAULT ; CALL ctl_stop( 'nn_tra_dta must be 0 or 1' )
324	END SELECT
325	ENDIF
326
327	IF ( ln_tra_dmp(ib_bdy) ) THEN
328	IF ( cn_tra(ib_bdy) == 'none' ) THEN
329	IF(lwp) WRITE(numout,*) 'No open boundary condition for tracers: ln_tra_dmp is set to .false.'
330	ln_tra_dmp(ib_bdy)=.false.
331	ELSEIF ( cn_tra(ib_bdy) == 'frs' ) THEN
332	CALL ctl_stop( 'Use FRS OR relaxation' )
333	ELSE
334	IF(lwp) WRITE(numout,*) ' + T/S relaxation zone'
335	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
336	IF(lwp) WRITE(numout,*) ' Outflow damping time scale: ',rn_time_dmp_out(ib_bdy),' days'
337	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
338	dta_bdy(ib_bdy)%ll_tem = .true.
339	dta_bdy(ib_bdy)%ll_sal = .true.
340	ENDIF
341	ELSE
342	IF(lwp) WRITE(numout,*) ' NO T/S relaxation'
343	ENDIF
344	IF(lwp) WRITE(numout,*)
345
346	#if defined key_si3
347	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
348	SELECT CASE( cn_ice(ib_bdy) )
349	CASE('none')
350	IF(lwp) WRITE(numout,*) ' no open boundary condition'
351	dta_bdy(ib_bdy)%ll_a_i = .false.
352	dta_bdy(ib_bdy)%ll_h_i = .false.
353	dta_bdy(ib_bdy)%ll_h_s = .false.
354	CASE('frs')
355	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
356	dta_bdy(ib_bdy)%ll_a_i = .true.
357	dta_bdy(ib_bdy)%ll_h_i = .true.
358	dta_bdy(ib_bdy)%ll_h_s = .true.
359	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_ice' )
360	END SELECT
361	IF( cn_ice(ib_bdy) /= 'none' ) THEN
362	SELECT CASE( nn_ice_dta(ib_bdy) ) !
363	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
364	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
365	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_dta must be 0 or 1' )
366	END SELECT
367	ENDIF
368	IF(lwp) WRITE(numout,*)
369	IF(lwp) WRITE(numout,*) ' tem of bdy sea-ice = ', rn_ice_tem(ib_bdy)
370	IF(lwp) WRITE(numout,*) ' sal of bdy sea-ice = ', rn_ice_sal(ib_bdy)
371	IF(lwp) WRITE(numout,*) ' age of bdy sea-ice = ', rn_ice_age(ib_bdy)
372	#endif
373
374	IF(lwp) WRITE(numout,*) ' Width of relaxation zone = ', nn_rimwidth(ib_bdy)
375	IF(lwp) WRITE(numout,*)
376	!
377	END DO
378
379	IF( nb_bdy > 0 ) THEN
380	IF( ln_vol ) THEN ! check volume conservation (nn_volctl value)
381	IF(lwp) WRITE(numout,*) 'Volume correction applied at open boundaries'
382	IF(lwp) WRITE(numout,*)
383	SELECT CASE ( nn_volctl )
384	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' The total volume will be constant'
385	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' The total volume will vary according to the surface E-P flux'
386	CASE DEFAULT ; CALL ctl_stop( 'nn_volctl must be 0 or 1' )
387	END SELECT
388	IF(lwp) WRITE(numout,*)
389	!
390	! sanity check if used with tides
391	IF( ln_tide ) THEN
392	IF(lwp) WRITE(numout,*) ' The total volume correction is not working with tides. '
393	IF(lwp) WRITE(numout,*) ' Set ln_vol to .FALSE. '
394	IF(lwp) WRITE(numout,*) ' or '
395	IF(lwp) WRITE(numout,*) ' equilibriate your bdy input files '
396	CALL ctl_stop( 'The total volume correction is not working with tides.' )
397	END IF
398	ELSE
399	IF(lwp) WRITE(numout,*) 'No volume correction applied at open boundaries'
400	IF(lwp) WRITE(numout,*)
401	ENDIF
402	IF( nb_jpk_bdy(ib_bdy) > 0 ) THEN
403	IF(lwp) WRITE(numout,) ' open boundary will be interpolate in the vertical onto the native grid *'
404	ELSE
405	IF(lwp) WRITE(numout,) ' open boundary will be read straight onto the native grid without vertical interpolation *'
406	ENDIF
407	ENDIF
408
409	! -------------------------------------------------
410	! Initialise indices arrays for open boundaries
411	! -------------------------------------------------
412
413	! Work out global dimensions of boundary data
414	! ---------------------------------------------
415	REWIND( numnam_cfg )
416
417	nblendta(:,:) = 0
418	nbdysege = 0
419	nbdysegw = 0
420	nbdysegn = 0
421	nbdysegs = 0
422	icount = 0 ! count user defined segments
423	! Dimensions below are used to allocate arrays to read external data
424	jpbdtas = 1 ! Maximum size of boundary data (structured case)
425	jpbdtau = 1 ! Maximum size of boundary data (unstructured case)
426
427	DO ib_bdy = 1, nb_bdy
428
429	IF( .NOT. ln_coords_file(ib_bdy) ) THEN ! Work out size of global arrays from namelist parameters
430
431	icount = icount + 1
432	! No REWIND here because may need to read more than one nambdy_index namelist.
433	! Read only namelist_cfg to avoid unseccessfull overwrite
434	! keep full control of the configuration namelist
435	READ ( numnam_cfg, nambdy_index, IOSTAT = ios, ERR = 904 )
436	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in configuration namelist', lwp )
437	IF(lwm) WRITE ( numond, nambdy_index )
438
439	SELECT CASE ( TRIM(ctypebdy) )
440	CASE( 'N' )
441	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
442	nbdyind = jpjglo - 2 ! set boundary to whole side of model domain.
443	nbdybeg = 2
444	nbdyend = jpiglo - 1
445	ENDIF
446	nbdysegn = nbdysegn + 1
447	npckgn(nbdysegn) = ib_bdy ! Save bdy package number
448	jpjnob(nbdysegn) = nbdyind
449	jpindt(nbdysegn) = nbdybeg
450	jpinft(nbdysegn) = nbdyend
451	!
452	CASE( 'S' )
453	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
454	nbdyind = 2 ! set boundary to whole side of model domain.
455	nbdybeg = 2
456	nbdyend = jpiglo - 1
457	ENDIF
458	nbdysegs = nbdysegs + 1
459	npckgs(nbdysegs) = ib_bdy ! Save bdy package number
460	jpjsob(nbdysegs) = nbdyind
461	jpisdt(nbdysegs) = nbdybeg
462	jpisft(nbdysegs) = nbdyend
463	!
464	CASE( 'E' )
465	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
466	nbdyind = jpiglo - 2 ! set boundary to whole side of model domain.
467	nbdybeg = 2
468	nbdyend = jpjglo - 1
469	ENDIF
470	nbdysege = nbdysege + 1
471	npckge(nbdysege) = ib_bdy ! Save bdy package number
472	jpieob(nbdysege) = nbdyind
473	jpjedt(nbdysege) = nbdybeg
474	jpjeft(nbdysege) = nbdyend
475	!
476	CASE( 'W' )
477	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
478	nbdyind = 2 ! set boundary to whole side of model domain.
479	nbdybeg = 2
480	nbdyend = jpjglo - 1
481	ENDIF
482	nbdysegw = nbdysegw + 1
483	npckgw(nbdysegw) = ib_bdy ! Save bdy package number
484	jpiwob(nbdysegw) = nbdyind
485	jpjwdt(nbdysegw) = nbdybeg
486	jpjwft(nbdysegw) = nbdyend
487	!
488	CASE DEFAULT ; CALL ctl_stop( 'ctypebdy must be N, S, E or W' )
489	END SELECT
490
491	! For simplicity we assume that in case of straight bdy, arrays have the same length
492	! (even if it is true that last tangential velocity points
493	! are useless). This simplifies a little bit boundary data format (and agrees with format
494	! used so far in obc package)
495
496	nblendta(1:jpbgrd,ib_bdy) = (nbdyend - nbdybeg + 1) * nn_rimwidth(ib_bdy)
497	jpbdtas = MAX(jpbdtas, (nbdyend - nbdybeg + 1))
498	IF (lwp.and.(nn_rimwidth(ib_bdy)>nrimmax)) &
499	& CALL ctl_stop( 'rimwidth must be lower than nrimmax' )
500
501	ELSE ! Read size of arrays in boundary coordinates file.
502	CALL iom_open( cn_coords_file(ib_bdy), inum )
503	DO igrd = 1, jpbgrd
504	id_dummy = iom_varid( inum, 'nbi'//cgrid(igrd), kdimsz=kdimsz )
505	nblendta(igrd,ib_bdy) = MAXVAL(kdimsz)
506	jpbdtau = MAX(jpbdtau, MAXVAL(kdimsz))
507	END DO
508	CALL iom_close( inum )
509	!
510	ENDIF
511	!
512	END DO ! ib_bdy
513
514	IF (nb_bdy>0) THEN
515	jpbdta = MAXVAL(nblendta(1:jpbgrd,1:nb_bdy))
516
517	! Allocate arrays
518	!---------------
519	ALLOCATE( nbidta(jpbdta, jpbgrd, nb_bdy), nbjdta(jpbdta, jpbgrd, nb_bdy), &
520	& nbrdta(jpbdta, jpbgrd, nb_bdy) )
521
522	jpk_max = MAXVAL(nb_jpk_bdy)
523	jpk_max = MAX(jpk_max, jpk)
524
525	ALLOCATE( dta_global(jpbdtau, 1, jpk_max) )
526	ALLOCATE( dta_global_z(jpbdtau, 1, jpk_max) ) ! needed ?? TODO
527	ALLOCATE( dta_global_dz(jpbdtau, 1, jpk_max) )! needed ?? TODO
528
529	IF ( icount>0 ) THEN
530	ALLOCATE( dta_global2(jpbdtas, nrimmax, jpk_max) )
531	ALLOCATE( dta_global2_z(jpbdtas, nrimmax, jpk_max) ) ! needed ?? TODO
532	ALLOCATE( dta_global2_dz(jpbdtas, nrimmax, jpk_max) )! needed ?? TODO
533	ENDIF
534	!
535	ENDIF
536
537	! Now look for crossings in user (namelist) defined open boundary segments:
538	!--------------------------------------------------------------------------
539	IF( icount>0 ) CALL bdy_ctl_seg
540
541	! Calculate global boundary index arrays or read in from file
542	!------------------------------------------------------------
543	! 1. Read global index arrays from boundary coordinates file.
544	DO ib_bdy = 1, nb_bdy
545	!
546	IF( ln_coords_file(ib_bdy) ) THEN
547	!
548	CALL iom_open( cn_coords_file(ib_bdy), inum )
549	DO igrd = 1, jpbgrd
550	CALL iom_get( inum, jpdom_unknown, 'nbi'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
551	DO ii = 1,nblendta(igrd,ib_bdy)
552	nbidta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
553	END DO
554	CALL iom_get( inum, jpdom_unknown, 'nbj'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
555	DO ii = 1,nblendta(igrd,ib_bdy)
556	nbjdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
557	END DO
558	CALL iom_get( inum, jpdom_unknown, 'nbr'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
559	DO ii = 1,nblendta(igrd,ib_bdy)
560	nbrdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
561	END DO
562	!
563	ibr_max = MAXVAL( nbrdta(:,igrd,ib_bdy) )
564	IF(lwp) WRITE(numout,*)
565	IF(lwp) WRITE(numout,*) ' Maximum rimwidth in file is ', ibr_max
566	IF(lwp) WRITE(numout,*) ' nn_rimwidth from namelist is ', nn_rimwidth(ib_bdy)
567	IF (ibr_max < nn_rimwidth(ib_bdy)) &
568	CALL ctl_stop( 'nn_rimwidth is larger than maximum rimwidth in file',cn_coords_file(ib_bdy) )
569	END DO
570	CALL iom_close( inum )
571	!
572	ENDIF
573	!
574	END DO
575
576	! 2. Now fill indices corresponding to straight open boundary arrays:
577	! East
578	!-----
579	DO iseg = 1, nbdysege
580	ib_bdy = npckge(iseg)
581	!
582	! ------------ T points -------------
583	igrd=1
584	icount=0
585	DO ir = 1, nn_rimwidth(ib_bdy)
586	DO ij = jpjedt(iseg), jpjeft(iseg)
587	icount = icount + 1
588	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
589	nbjdta(icount, igrd, ib_bdy) = ij
590	nbrdta(icount, igrd, ib_bdy) = ir
591	ENDDO
592	ENDDO
593	!
594	! ------------ U points -------------
595	igrd=2
596	icount=0
597	DO ir = 1, nn_rimwidth(ib_bdy)
598	DO ij = jpjedt(iseg), jpjeft(iseg)
599	icount = icount + 1
600	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 1 - ir
601	nbjdta(icount, igrd, ib_bdy) = ij
602	nbrdta(icount, igrd, ib_bdy) = ir
603	ENDDO
604	ENDDO
605	!
606	! ------------ V points -------------
607	igrd=3
608	icount=0
609	DO ir = 1, nn_rimwidth(ib_bdy)
610	! DO ij = jpjedt(iseg), jpjeft(iseg) - 1
611	DO ij = jpjedt(iseg), jpjeft(iseg)
612	icount = icount + 1
613	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
614	nbjdta(icount, igrd, ib_bdy) = ij
615	nbrdta(icount, igrd, ib_bdy) = ir
616	ENDDO
617	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
618	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
619	ENDDO
620	ENDDO
621	!
622	! West
623	!-----
624	DO iseg = 1, nbdysegw
625	ib_bdy = npckgw(iseg)
626	!
627	! ------------ T points -------------
628	igrd=1
629	icount=0
630	DO ir = 1, nn_rimwidth(ib_bdy)
631	DO ij = jpjwdt(iseg), jpjwft(iseg)
632	icount = icount + 1
633	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
634	nbjdta(icount, igrd, ib_bdy) = ij
635	nbrdta(icount, igrd, ib_bdy) = ir
636	ENDDO
637	ENDDO
638	!
639	! ------------ U points -------------
640	igrd=2
641	icount=0
642	DO ir = 1, nn_rimwidth(ib_bdy)
643	DO ij = jpjwdt(iseg), jpjwft(iseg)
644	icount = icount + 1
645	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
646	nbjdta(icount, igrd, ib_bdy) = ij
647	nbrdta(icount, igrd, ib_bdy) = ir
648	ENDDO
649	ENDDO
650	!
651	! ------------ V points -------------
652	igrd=3
653	icount=0
654	DO ir = 1, nn_rimwidth(ib_bdy)
655	! DO ij = jpjwdt(iseg), jpjwft(iseg) - 1
656	DO ij = jpjwdt(iseg), jpjwft(iseg)
657	icount = icount + 1
658	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
659	nbjdta(icount, igrd, ib_bdy) = ij
660	nbrdta(icount, igrd, ib_bdy) = ir
661	ENDDO
662	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
663	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
664	ENDDO
665	ENDDO
666	!
667	! North
668	!-----
669	DO iseg = 1, nbdysegn
670	ib_bdy = npckgn(iseg)
671	!
672	! ------------ T points -------------
673	igrd=1
674	icount=0
675	DO ir = 1, nn_rimwidth(ib_bdy)
676	DO ii = jpindt(iseg), jpinft(iseg)
677	icount = icount + 1
678	nbidta(icount, igrd, ib_bdy) = ii
679	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
680	nbrdta(icount, igrd, ib_bdy) = ir
681	ENDDO
682	ENDDO
683	!
684	! ------------ U points -------------
685	igrd=2
686	icount=0
687	DO ir = 1, nn_rimwidth(ib_bdy)
688	! DO ii = jpindt(iseg), jpinft(iseg) - 1
689	DO ii = jpindt(iseg), jpinft(iseg)
690	icount = icount + 1
691	nbidta(icount, igrd, ib_bdy) = ii
692	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
693	nbrdta(icount, igrd, ib_bdy) = ir
694	ENDDO
695	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
696	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
697	ENDDO
698	!
699	! ------------ V points -------------
700	igrd=3
701	icount=0
702	DO ir = 1, nn_rimwidth(ib_bdy)
703	DO ii = jpindt(iseg), jpinft(iseg)
704	icount = icount + 1
705	nbidta(icount, igrd, ib_bdy) = ii
706	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 1 - ir
707	nbrdta(icount, igrd, ib_bdy) = ir
708	ENDDO
709	ENDDO
710	ENDDO
711	!
712	! South
713	!-----
714	DO iseg = 1, nbdysegs
715	ib_bdy = npckgs(iseg)
716	!
717	! ------------ T points -------------
718	igrd=1
719	icount=0
720	DO ir = 1, nn_rimwidth(ib_bdy)
721	DO ii = jpisdt(iseg), jpisft(iseg)
722	icount = icount + 1
723	nbidta(icount, igrd, ib_bdy) = ii
724	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
725	nbrdta(icount, igrd, ib_bdy) = ir
726	ENDDO
727	ENDDO
728	!
729	! ------------ U points -------------
730	igrd=2
731	icount=0
732	DO ir = 1, nn_rimwidth(ib_bdy)
733	! DO ii = jpisdt(iseg), jpisft(iseg) - 1
734	DO ii = jpisdt(iseg), jpisft(iseg)
735	icount = icount + 1
736	nbidta(icount, igrd, ib_bdy) = ii
737	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
738	nbrdta(icount, igrd, ib_bdy) = ir
739	ENDDO
740	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
741	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
742	ENDDO
743	!
744	! ------------ V points -------------
745	igrd=3
746	icount=0
747	DO ir = 1, nn_rimwidth(ib_bdy)
748	DO ii = jpisdt(iseg), jpisft(iseg)
749	icount = icount + 1
750	nbidta(icount, igrd, ib_bdy) = ii
751	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
752	nbrdta(icount, igrd, ib_bdy) = ir
753	ENDDO
754	ENDDO
755	ENDDO
756
757	! Deal with duplicated points
758	!-----------------------------
759	! We assign negative indices to duplicated points (to remove them from bdy points to be updated)
760	! if their distance to the bdy is greater than the other
761	! If their distance are the same, just keep only one to avoid updating a point twice
762	DO igrd = 1, jpbgrd
763	DO ib_bdy1 = 1, nb_bdy
764	DO ib_bdy2 = 1, nb_bdy
765	IF (ib_bdy1/=ib_bdy2) THEN
766	DO ib1 = 1, nblendta(igrd,ib_bdy1)
767	DO ib2 = 1, nblendta(igrd,ib_bdy2)
768	IF ((nbidta(ib1, igrd, ib_bdy1)==nbidta(ib2, igrd, ib_bdy2)).AND. &
769	& (nbjdta(ib1, igrd, ib_bdy1)==nbjdta(ib2, igrd, ib_bdy2))) THEN
770	! IF ((lwp).AND.(igrd==1)) WRITE(numout,*) ' found coincident point ji, jj:', &
771	! & nbidta(ib1, igrd, ib_bdy1), &
772	! & nbjdta(ib2, igrd, ib_bdy2)
773	! keep only points with the lowest distance to boundary:
774	IF (nbrdta(ib1, igrd, ib_bdy1)<nbrdta(ib2, igrd, ib_bdy2)) THEN
775	nbidta(ib2, igrd, ib_bdy2) =-ib_bdy2
776	nbjdta(ib2, igrd, ib_bdy2) =-ib_bdy2
777	ELSEIF (nbrdta(ib1, igrd, ib_bdy1)>nbrdta(ib2, igrd, ib_bdy2)) THEN
778	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
779	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
780	! Arbitrary choice if distances are the same:
781	ELSE
782	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
783	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
784	ENDIF
785	END IF
786	END DO
787	END DO
788	ENDIF
789	END DO
790	END DO
791	END DO
792
793	! Work out dimensions of boundary data on each processor
794	! ------------------------------------------------------
795
796	! Rather assume that boundary data indices are given on global domain
797	! TO BE DISCUSSED ?
798	! iw = mig(1) + 1 ! if monotasking and no zoom, iw=2
799	! ie = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
800	! is = mjg(1) + 1 ! if monotasking and no zoom, is=2
801	! in = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
802	iwe = mig(1) - 1 + 2 - nde ! if monotasking and no zoom, iw=2
803	ies = mig(1) + nlci-1 - 1 + nde ! if monotasking and no zoom, ie=jpim1
804	iso = mjg(1) - 1 + 2 -nde ! if monotasking and no zoom, is=2
805	ino = mjg(1) + nlcj-1 - 1 + nde ! if monotasking and no zoom, in=jpjm1
806
807	ALLOCATE( nbondi_bdy(nb_bdy))
808	ALLOCATE( nbondj_bdy(nb_bdy))
809	nbondi_bdy(:)=2
810	nbondj_bdy(:)=2
811	ALLOCATE( nbondi_bdy_b(nb_bdy))
812	ALLOCATE( nbondj_bdy_b(nb_bdy))
813	nbondi_bdy_b(:)=2
814	nbondj_bdy_b(:)=2
815
816	! Work out dimensions of boundary data on each neighbour process
817	IF(nbondi == 0) THEN
818	iw_b(1) = 1 + nimppt(nowe+1)
819	ie_b(1) = 1 + nimppt(nowe+1)+nlcit(nowe+1)-3
820	is_b(1) = 1 + njmppt(nowe+1)
821	in_b(1) = 1 + njmppt(nowe+1)+nlcjt(nowe+1)-3
822
823	iw_b(2) = 1 + nimppt(noea+1)
824	ie_b(2) = 1 + nimppt(noea+1)+nlcit(noea+1)-3
825	is_b(2) = 1 + njmppt(noea+1)
826	in_b(2) = 1 + njmppt(noea+1)+nlcjt(noea+1)-3
827	ELSEIF(nbondi == 1) THEN
828	iw_b(1) = 1 + nimppt(nowe+1)
829	ie_b(1) = 1 + nimppt(nowe+1)+nlcit(nowe+1)-3
830	is_b(1) = 1 + njmppt(nowe+1)
831	in_b(1) = 1 + njmppt(nowe+1)+nlcjt(nowe+1)-3
832	ELSEIF(nbondi == -1) THEN
833	iw_b(2) = 1 + nimppt(noea+1)
834	ie_b(2) = 1 + nimppt(noea+1)+nlcit(noea+1)-3
835	is_b(2) = 1 + njmppt(noea+1)
836	in_b(2) = 1 + njmppt(noea+1)+nlcjt(noea+1)-3
837	ENDIF
838
839	IF(nbondj == 0) THEN
840	iw_b(3) = 1 + nimppt(noso+1)
841	ie_b(3) = 1 + nimppt(noso+1)+nlcit(noso+1)-3
842	is_b(3) = 1 + njmppt(noso+1)
843	in_b(3) = 1 + njmppt(noso+1)+nlcjt(noso+1)-3
844
845	iw_b(4) = 1 + nimppt(nono+1)
846	ie_b(4) = 1 + nimppt(nono+1)+nlcit(nono+1)-3
847	is_b(4) = 1 + njmppt(nono+1)
848	in_b(4) = 1 + njmppt(nono+1)+nlcjt(nono+1)-3
849	ELSEIF(nbondj == 1) THEN
850	iw_b(3) = 1 + nimppt(noso+1)
851	ie_b(3) = 1 + nimppt(noso+1)+nlcit(noso+1)-3
852	is_b(3) = 1 + njmppt(noso+1)
853	in_b(3) = 1 + njmppt(noso+1)+nlcjt(noso+1)-3
854	ELSEIF(nbondj == -1) THEN
855	iw_b(4) = 1 + nimppt(nono+1)
856	ie_b(4) = 1 + nimppt(nono+1)+nlcit(nono+1)-3
857	is_b(4) = 1 + njmppt(nono+1)
858	in_b(4) = 1 + njmppt(nono+1)+nlcjt(nono+1)-3
859	ENDIF
860
861	DO ib_bdy = 1, nb_bdy
862	DO igrd = 1, jpbgrd
863	icount = 0
864	icountr = 0
865	idx_bdy(ib_bdy)%nblen(igrd) = 0
866	idx_bdy(ib_bdy)%nblenrim(igrd) = 0
867	DO ib = 1, nblendta(igrd,ib_bdy)
868	! check that data is in correct order in file
869	ibm1 = MAX(1,ib-1)
870	IF(lwp) THEN ! Since all procs read global data only need to do this check on one proc...
871	IF( nbrdta(ib,igrd,ib_bdy) < nbrdta(ibm1,igrd,ib_bdy) ) THEN
872	CALL ctl_stop('bdy_segs : ERROR : boundary data in file must be defined ', &
873	& ' in order of distance from edge nbr A utility for re-ordering ', &
874	& ' boundary coordinates and data files exists in the TOOLS/OBC directory')
875	ENDIF
876	ENDIF
877	! check if point is in local domain
878	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
879	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino ) THEN
880	!
881	icount = icount + 1
882	!
883	IF( nbrdta(ib,igrd,ib_bdy) == 1 ) icountr = icountr+1
884	ENDIF
885	END DO
886	idx_bdy(ib_bdy)%nblenrim(igrd) = icountr !: length of rim boundary data on each proc
887	idx_bdy(ib_bdy)%nblen (igrd) = icount !: length of boundary data on each proc
888	END DO ! igrd
889
890	! Allocate index arrays for this boundary set
891	!--------------------------------------------
892	ilen1 = MAXVAL( idx_bdy(ib_bdy)%nblen(:) )
893	ALLOCATE( idx_bdy(ib_bdy)%nbi (ilen1,jpbgrd) , &
894	& idx_bdy(ib_bdy)%nbj (ilen1,jpbgrd) , &
895	& idx_bdy(ib_bdy)%nbr (ilen1,jpbgrd) , &
896	& idx_bdy(ib_bdy)%nbd (ilen1,jpbgrd) , &
897	& idx_bdy(ib_bdy)%nbdout(ilen1,jpbgrd) , &
898	& idx_bdy(ib_bdy)%ntreat(ilen1,jpbgrd) , &
899	& idx_bdy(ib_bdy)%nbmap (ilen1,jpbgrd) , &
900	& idx_bdy(ib_bdy)%nbw (ilen1,jpbgrd) , &
901	& idx_bdy(ib_bdy)%flagu (ilen1,jpbgrd) , &
902	& idx_bdy(ib_bdy)%flagv (ilen1,jpbgrd) )
903
904	! Dispatch mapping indices and discrete distances on each processor
905	! -----------------------------------------------------------------
906
907	com_east = 0
908	com_west = 0
909	com_south = 0
910	com_north = 0
911
912	com_east_b = 0
913	com_west_b = 0
914	com_south_b = 0
915	com_north_b = 0
916
917	DO igrd = 1, jpbgrd
918	icount = 0
919	! Loop on rimwidth to ensure outermost points come first in the local arrays.
920	DO ir=1, nn_rimwidth(ib_bdy)
921	DO ib = 1, nblendta(igrd,ib_bdy)
922	! check if point is in local domain and equals ir
923	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
924	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino .AND. &
925	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
926	!
927	icount = icount + 1
928
929	! Rather assume that boundary data indices are given on global domain
930	! TO BE DISCUSSED ?
931	! idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
932	! idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
933	idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
934	idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
935	! check if point has to be sent
936	ii = idx_bdy(ib_bdy)%nbi(icount,igrd)
937	ij = idx_bdy(ib_bdy)%nbj(icount,igrd)
938	if((com_east .ne. 1) .and. (ii == (nlci-1)) .and. (nbondi .le. 0)) then
939	com_east = 1
940	elseif((com_west .ne. 1) .and. (ii == 2) .and. (nbondi .ge. 0) .and. (nbondi .ne. 2)) then
941	com_west = 1
942	endif
943	if((com_south .ne. 1) .and. (ij == 2) .and. (nbondj .ge. 0) .and. (nbondj .ne. 2)) then
944	com_south = 1
945	elseif((com_north .ne. 1) .and. (ij == (nlcj-1)) .and. (nbondj .le. 0)) then
946	com_north = 1
947	endif
948	idx_bdy(ib_bdy)%nbr(icount,igrd) = nbrdta(ib,igrd,ib_bdy)
949	idx_bdy(ib_bdy)%nbmap(icount,igrd) = ib
950	ENDIF
951	! check if point has to be received from a neighbour
952	IF(nbondi == 0) THEN
953	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
954	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
955	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
956	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
957	if( ii == (nlcit(nowe+1)-1) ) then
958	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
959	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
960	com_south = 1
961	elseif((ij == nlcjt(nowe+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
962	com_north = 1
963	endif
964	com_west_b = 1
965	endif
966	ENDIF
967	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
968	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
969	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
970	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
971	if( ii == 2 ) then
972	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
973	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
974	com_south = 1
975	elseif((ij == nlcjt(noea+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
976	com_north = 1
977	endif
978	com_east_b = 1
979	endif
980	ENDIF
981	ELSEIF(nbondi == 1) THEN
982	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
983	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
984	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
985	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
986	if( ii == (nlcit(nowe+1)-1) ) then
987	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
988	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
989	com_south = 1
990	elseif((ij == nlcjt(nowe+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
991	com_north = 1
992	endif
993	com_west_b = 1
994	endif
995	ENDIF
996	ELSEIF(nbondi == -1) THEN
997	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
998	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
999	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1000	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
1001	if( ii == 2 ) then
1002	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
1003	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
1004	com_south = 1
1005	elseif((ij == nlcjt(noea+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
1006	com_north = 1
1007	endif
1008	com_east_b = 1
1009	endif
1010	ENDIF
1011	ENDIF
1012	IF(nbondj == 0) THEN
1013	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1014	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1015	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1016	com_north_b = 1
1017	ENDIF
1018	IF(com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 &
1019	&.OR. nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1020	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1021	com_south_b = 1
1022	ENDIF
1023	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1024	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1025	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1026	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1027	if((com_south_b .ne. 1) .and. (ij == (nlcjt(noso+1)-1))) then
1028	com_south_b = 1
1029	endif
1030	ENDIF
1031	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1032	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1033	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1034	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1035	if((com_north_b .ne. 1) .and. (ij == 2)) then
1036	com_north_b = 1
1037	endif
1038	ENDIF
1039	ELSEIF(nbondj == 1) THEN
1040	IF( com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 .OR. &
1041	& nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1042	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1043	com_south_b = 1
1044	ENDIF
1045	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1046	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1047	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1048	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1049	if((com_south_b .ne. 1) .and. (ij == (nlcjt(noso+1)-1))) then
1050	com_south_b = 1
1051	endif
1052	ENDIF
1053	ELSEIF(nbondj == -1) THEN
1054	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1055	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1056	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1057	com_north_b = 1
1058	ENDIF
1059	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1060	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1061	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1062	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1063	if((com_north_b .ne. 1) .and. (ij == 2)) then
1064	com_north_b = 1
1065	endif
1066	ENDIF
1067	ENDIF
1068	ENDDO
1069	ENDDO
1070	ENDDO
1071
1072	! definition of the i- and j- direction local boundaries arrays used for sending the boundaries
1073	IF( (com_east == 1) .and. (com_west == 1) ) THEN ; nbondi_bdy(ib_bdy) = 0
1074	ELSEIF( (com_east == 1) .and. (com_west == 0) ) THEN ; nbondi_bdy(ib_bdy) = -1
1075	ELSEIF( (com_east == 0) .and. (com_west == 1) ) THEN ; nbondi_bdy(ib_bdy) = 1
1076	ENDIF
1077	IF( (com_north == 1) .and. (com_south == 1) ) THEN ; nbondj_bdy(ib_bdy) = 0
1078	ELSEIF( (com_north == 1) .and. (com_south == 0) ) THEN ; nbondj_bdy(ib_bdy) = -1
1079	ELSEIF( (com_north == 0) .and. (com_south == 1) ) THEN ; nbondj_bdy(ib_bdy) = 1
1080	ENDIF
1081
1082	! definition of the i- and j- direction local boundaries arrays used for receiving the boundaries
1083	IF( (com_east_b == 1) .and. (com_west_b == 1) ) THEN ; nbondi_bdy_b(ib_bdy) = 0
1084	ELSEIF( (com_east_b == 1) .and. (com_west_b == 0) ) THEN ; nbondi_bdy_b(ib_bdy) = -1
1085	ELSEIF( (com_east_b == 0) .and. (com_west_b == 1) ) THEN ; nbondi_bdy_b(ib_bdy) = 1
1086	ENDIF
1087	IF( (com_north_b == 1) .and. (com_south_b == 1) ) THEN ; nbondj_bdy_b(ib_bdy) = 0
1088	ELSEIF( (com_north_b == 1) .and. (com_south_b == 0) ) THEN ; nbondj_bdy_b(ib_bdy) = -1
1089	ELSEIF( (com_north_b == 0) .and. (com_south_b == 1) ) THEN ; nbondj_bdy_b(ib_bdy) = 1
1090	ENDIF
1091
1092	! Compute rim weights for FRS scheme
1093	! ----------------------------------
1094	DO igrd = 1, jpbgrd
1095	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1096	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1097	idx_bdy(ib_bdy)%nbw(ib,igrd) = 1.- TANH( REAL( nbr - 1 ) *0.5 ) ! tanh formulation
1098	! idx_bdy(ib_bdy)%nbw(ib,igrd) = (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))**2. ! quadratic
1099	! idx_bdy(ib_bdy)%nbw(ib,igrd) = REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)) ! linear
1100	END DO
1101	END DO
1102
1103	! Compute damping coefficients
1104	! ----------------------------
1105	DO igrd = 1, jpbgrd
1106	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1107	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1108	idx_bdy(ib_bdy)%nbd(ib,igrd) = 1. / ( rn_time_dmp(ib_bdy) * rday ) &
1109	& (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))*2. ! quadratic
1110	idx_bdy(ib_bdy)%nbdout(ib,igrd) = 1. / ( rn_time_dmp_out(ib_bdy) * rday ) &
1111	& (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))*2. ! quadratic
1112	END DO
1113	END DO
1114
1115	END DO
1116
1117	! ------------------------------------------------------
1118	! Initialise masks and find normal/tangential directions
1119	! ------------------------------------------------------
1120
1121	! Read global 2D mask at T-points: bdytmask
1122	! -----------------------------------------
1123	! bdytmask = 1 on the computational domain AND on open boundaries
1124	! = 0 elsewhere
1125
1126	bdytmask(:,:) = ssmask(:,:)
1127
1128	! Derive mask on U and V grid from mask on T grid
1129
1130	bdyumask(:,:) = 0._wp
1131	bdyvmask(:,:) = 0._wp
1132	DO ij = 1, jpjm1
1133	DO ii = 1, jpim1
1134	bdyumask(ii,ij) = bdytmask(ii,ij) * bdytmask(ii+1, ij )
1135	bdyvmask(ii,ij) = bdytmask(ii,ij) * bdytmask(ii ,ij+1)
1136	END DO
1137	END DO
1138	CALL lbc_lnk_multi( 'bdyini', bdyumask, 'U', 1. , bdyvmask, 'V', 1. ) ! Lateral boundary cond.
1139
1140	! bdy masks are now set to zero on boundary points:
1141	!
1142	igrd = 1
1143	DO ib_bdy = 1, nb_bdy
1144	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1145	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1146	END DO
1147	END DO
1148	!
1149	igrd = 2
1150	DO ib_bdy = 1, nb_bdy
1151	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1152	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1153	END DO
1154	END DO
1155	!
1156	igrd = 3
1157	DO ib_bdy = 1, nb_bdy
1158	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1159	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1160	END DO
1161	END DO
1162
1163	! For the flagu/flagv calculation below we require a version of fmask without
1164	! the land boundary condition (shlat) included:
1165	zfmask(:,:) = 0
1166	DO ij = 2, jpjm1
1167	DO ii = 2, jpim1
1168	zfmask(ii,ij) = tmask(ii,ij ,1) * tmask(ii+1,ij ,1) &
1169	& * tmask(ii,ij+1,1) * tmask(ii+1,ij+1,1)
1170	END DO
1171	END DO
1172
1173	! Lateral boundary conditions
1174	CALL lbc_lnk( 'bdyini', zfmask, 'F', 1. )
1175	CALL lbc_lnk_multi( 'bdyini', bdyumask, 'U', 1. , bdyvmask, 'V', 1., bdytmask, 'T', 1. )
1176	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1177	icount = 0
1178
1179	! Calculate relationship of U direction to the local orientation of the boundary
1180	! flagu = -1 : u component is normal to the dynamical boundary and its direction is outward
1181	! flagu = 0 : u is tangential
1182	! flagu = 1 : u is normal to the boundary and is direction is inward
1183
1184	DO igrd = 1, jpbgrd
1185	SELECT CASE( igrd )
1186	CASE( 1 ) ; pmask => umask (:,:,1) ; i_offset = 0
1187	CASE( 2 ) ; pmask => bdytmask(:,:) ; i_offset = 1
1188	CASE( 3 ) ; pmask => zfmask (:,:) ; i_offset = 0
1189	END SELECT
1190	icount = 0
1191	ztmp(:,:) = 0._wp
1192	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1193	ii = idx_bdy(ib_bdy)%nbi(ib,igrd)
1194	ij = idx_bdy(ib_bdy)%nbj(ib,igrd)
1195	IF( ii == 1 .OR. ii == jpi .OR. ij == 1 .OR. ij == jpj ) CYCLE
1196	zefl = pmask(ii+i_offset-1,ij)
1197	zwfl = pmask(ii+i_offset ,ij)
1198	! This error check only works if you are using the bdyXmask arrays
1199	IF( i_offset == 1 .and. zefl + zwfl == 2. ) THEN
1200	icount = icount + 1
1201	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(ii),mjg(ij)
1202	ELSE
1203	ztmp(ii,ij) = -zefl + zwfl
1204	ENDIF
1205	END DO
1206	IF( icount /= 0 ) THEN
1207	WRITE(ctmp1,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1208	' are not boundary points (flagu calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1209	WRITE(ctmp2,*) ' ========== '
1210	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1211	ENDIF
1212	CALL lbc_lnk( 'bdyini', ztmp, 'T', 1. )
1213	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1214	ii = idx_bdy(ib_bdy)%nbi(ib,igrd)
1215	ij = idx_bdy(ib_bdy)%nbj(ib,igrd)
1216	idx_bdy(ib_bdy)%flagu(ib,igrd) = ztmp(ii,ij)
1217	END DO
1218	END DO
1219
1220	! Calculate relationship of V direction to the local orientation of the boundary
1221	! flagv = -1 : v component is normal to the dynamical boundary but its direction is outward
1222	! flagv = 0 : v is tangential
1223	! flagv = 1 : v is normal to the boundary and is direction is inward
1224
1225	DO igrd = 1, jpbgrd
1226	SELECT CASE( igrd )
1227	CASE( 1 ) ; pmask => vmask (:,:,1) ; j_offset = 0
1228	CASE( 2 ) ; pmask => zfmask(:,:) ; j_offset = 0
1229	CASE( 3 ) ; pmask => bdytmask ; j_offset = 1
1230	END SELECT
1231	icount = 0
1232	ztmp(:,:) = 0._wp
1233	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1234	ii = idx_bdy(ib_bdy)%nbi(ib,igrd)
1235	ij = idx_bdy(ib_bdy)%nbj(ib,igrd)
1236	IF( ii == 1 .OR. ii == jpi .OR. ij == 1 .OR. ij == jpj ) CYCLE
1237	znfl = pmask(ii,ij+j_offset-1)
1238	zsfl = pmask(ii,ij+j_offset )
1239	! This error check only works if you are using the bdyXmask arrays
1240	IF( j_offset == 1 .and. znfl + zsfl == 2. ) THEN
1241	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(ii),mjg(ij)
1242	icount = icount + 1
1243	ELSE
1244	ztmp(ii,ij) = -znfl + zsfl
1245	END IF
1246	END DO
1247	IF( icount /= 0 ) THEN
1248	WRITE(ctmp1,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1249	' are not boundary points (flagv calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1250	WRITE(ctmp2,*) ' ========== '
1251	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1252	ENDIF
1253	CALL lbc_lnk( 'bdyini', ztmp, 'T', 1. )
1254	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1255	ii = idx_bdy(ib_bdy)%nbi(ib,igrd)
1256	ij = idx_bdy(ib_bdy)%nbj(ib,igrd)
1257	idx_bdy(ib_bdy)%flagv(ib,igrd) = ztmp(ii,ij)
1258	END DO
1259	END DO
1260	!
1261	END DO
1262
1263	! detect corner interior and its orientation index 1 to 4 depending on the orientation
1264	! detect corner exterior and its orientation index 5 to 8 depending on the orientation
1265	! detect geometries with 3 neighbours index 9 to 12 depending on the orientation
1266	! else index 0
1267	DO ib_bdy = 1, nb_bdy
1268	DO igrd = 1, jpbgrd
1269	SELECT CASE( igrd )
1270	CASE( 1 ) ; pmask => bdytmask
1271	CASE( 2 ) ; pmask => bdyumask
1272	CASE( 3 ) ; pmask => bdyvmask
1273	END SELECT
1274	ztmp(:,:) = 0._wp
1275	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1276	ii = idx_bdy(ib_bdy)%nbi(ib,igrd)
1277	ij = idx_bdy(ib_bdy)%nbj(ib,igrd)
1278	IF( ii == 1 .OR. ii == jpi .OR. ij == 1 .OR. ij == jpj ) CYCLE
1279	llnobdy = pmask(ii ,ij+1) == 1.
1280	llsobdy = pmask(ii ,ij-1) == 1.
1281	lleabdy = pmask(ii+1,ij ) == 1.
1282	llwebdy = pmask(ii-1,ij ) == 1.
1283	inbdy = COUNT( (/ llnobdy, llsobdy, lleabdy, llwebdy /) )
1284	IF( inbdy == 0 ) THEN ! no neighbours -> interior of a corner
1285	! ! ! _____ ! _____
1286	! 1 \| o ! 2 o \| ! 3 \| x ! 4 x \|
1287	! \|_x_ _ ! _ _x_\| ! \| o ! o \|
1288	IF( pmask(ii+1,ij+1) == 1. ) ztmp(ii,ij) = 1
1289	IF( pmask(ii-1,ij+1) == 1. ) ztmp(ii,ij) = 2
1290	IF( pmask(ii+1,ij-1) == 1. ) ztmp(ii,ij) = 3
1291	IF( pmask(ii-1,ij-1) == 1. ) ztmp(ii,ij) = 4
1292	END IF
1293	IF( inbdy == 1 ) THEN ! middle of linear bdy
1294	ztmp(ii,ij) = 0 ! regular treatment with flags
1295	END IF
1296	IF( inbdy == 2 ) THEN ! exterior of a corner
1297	! o ! o ! _____\| ! \|_____
1298	! 5 ____x o ! 6 o x___ ! 7 x o ! 8 o x
1299	! \| ! \| ! o ! o
1300	IF( llnobdy .AND. lleabdy ) ztmp(ii,ij) = 5
1301	IF( llnobdy .AND. llwebdy ) ztmp(ii,ij) = 6
1302	IF( llsobdy .AND. lleabdy ) ztmp(ii,ij) = 7
1303	IF( llsobdy .AND. llwebdy ) ztmp(ii,ij) = 8
1304	END IF
1305	IF( inbdy == 3 ) THEN ! 3 neighbours __ __
1306	! \|_ o ! o _\| ! \|_\| ! o
1307	! 9 _\| x o ! 10 o x \|_ ! 11 o x o ! 12 o x o
1308	! \| o ! o \| ! o ! __\|¨\|__
1309	IF( llnobdy .AND. lleabdy .AND. llsobdy ) ztmp(ii,ij) = 9
1310	IF( llnobdy .AND. llwebdy .AND. llsobdy ) ztmp(ii,ij) = 10
1311	IF( llwebdy .AND. llsobdy .AND. lleabdy ) ztmp(ii,ij) = 11
1312	IF( llwebdy .AND. llnobdy .AND. lleabdy ) ztmp(ii,ij) = 12
1313	END IF
1314	IF( inbdy == 4 ) THEN
1315	WRITE(ctmp1,*) ' E R R O R : Problem with ',cgrid(igrd) ,' grid points,', &
1316	' some points on boundary set ', ib_bdy, ' have 4 neighbours'
1317	WRITE(ctmp2,*) ' ========== '
1318	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1319	END IF
1320	END DO
1321	CALL lbc_lnk( 'bdyini', ztmp, 'T', 1. )
1322	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1323	ii = idx_bdy(ib_bdy)%nbi(ib,igrd)
1324	ij = idx_bdy(ib_bdy)%nbj(ib,igrd)
1325	idx_bdy(ib_bdy)%ntreat(ib,igrd) = ztmp(ii,ij)
1326	END DO
1327	END DO
1328	END DO
1329	!
1330	! Tidy up
1331	!--------
1332	IF( nb_bdy>0 ) DEALLOCATE( nbidta, nbjdta, nbrdta )
1333	!
1334	END SUBROUTINE bdy_segs
1335
1336	SUBROUTINE bdy_ctl_seg
1337	!!----------------------------------------------------------------------
1338	!! * ROUTINE bdy_ctl_seg *
1339	!!
1340	!! ** Purpose : Check straight open boundary segments location
1341	!!
1342	!! ** Method : - Look for open boundary corners
1343	!! - Check that segments start or end on land
1344	!!----------------------------------------------------------------------
1345	INTEGER :: ib, ib1, ib2, ji ,jj, itest
1346	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1347	REAL(wp), DIMENSION(2) :: ztestmask
1348	!!----------------------------------------------------------------------
1349	!
1350	IF (lwp) WRITE(numout,*) ' '
1351	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1352	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1353	!
1354	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1355	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1356	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1357	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1358	! 1. Check bounds
1359	!----------------
1360	DO ib = 1, nbdysegn
1361	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1362	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1363	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1364	IF (jpindt(ib).ge.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1365	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1366	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1367	END DO
1368	!
1369	DO ib = 1, nbdysegs
1370	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1371	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1372	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1373	IF (jpisdt(ib).ge.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1374	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1375	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1376	END DO
1377	!
1378	DO ib = 1, nbdysege
1379	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1380	IF ((jpieob(ib).ge.jpiglo-1).or.&
1381	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1382	IF (jpjedt(ib).ge.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1383	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1384	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1385	END DO
1386	!
1387	DO ib = 1, nbdysegw
1388	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1389	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1390	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1391	IF (jpjwdt(ib).ge.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1392	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1393	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1394	ENDDO
1395	!
1396	!
1397	! 2. Look for segment crossings
1398	!------------------------------
1399	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1400	!
1401	itest = 0 ! corner number
1402	!
1403	! flag to detect if start or end of open boundary belongs to a corner
1404	! if not (=0), it must be on land.
1405	! if a corner is detected, save bdy package number for further tests
1406	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1407	! South/West crossings
1408	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1409	DO ib1 = 1, nbdysegw
1410	DO ib2 = 1, nbdysegs
1411	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1412	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1413	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1414	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1415	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1416	! We have a possible South-West corner
1417	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1418	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1419	icornw(ib1,1) = npckgs(ib2)
1420	icorns(ib2,1) = npckgw(ib1)
1421	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1422	WRITE(ctmp1,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1423	& jpisft(ib2), jpjwft(ib1)
1424	WRITE(ctmp2,*) ' ========== Not allowed yet'
1425	WRITE(ctmp3,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1426	& ' and South segment: ',npckgs(ib2)
1427	CALL ctl_stop( ' ', ctmp1, ctmp2, ctmp3, ' ' )
1428	ELSE
1429	WRITE(ctmp1,*) ' E R R O R : Check South and West Open boundary indices'
1430	WRITE(ctmp2,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1431	& ' and South segment: ',npckgs(ib2)
1432	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1433	END IF
1434	END IF
1435	END DO
1436	END DO
1437	END IF
1438	!
1439	! South/East crossings
1440	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1441	DO ib1 = 1, nbdysege
1442	DO ib2 = 1, nbdysegs
1443	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1444	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1445	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1446	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1447	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1448	! We have a possible South-East corner
1449	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1450	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1451	icorne(ib1,1) = npckgs(ib2)
1452	icorns(ib2,2) = npckge(ib1)
1453	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1454	WRITE(ctmp1,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1455	& jpisdt(ib2), jpjeft(ib1)
1456	WRITE(ctmp2,*) ' ========== Not allowed yet'
1457	WRITE(ctmp3,*) ' Crossing problem with East segment: ',npckge(ib1), &
1458	& ' and South segment: ',npckgs(ib2)
1459	CALL ctl_stop( ' ', ctmp1, ctmp2, ctmp3, ' ' )
1460	ELSE
1461	WRITE(ctmp1,*) ' E R R O R : Check South and East Open boundary indices'
1462	WRITE(ctmp2,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1463	& ' and South segment: ',npckgs(ib2)
1464	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1465	END IF
1466	END IF
1467	END DO
1468	END DO
1469	END IF
1470	!
1471	! North/West crossings
1472	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1473	DO ib1 = 1, nbdysegw
1474	DO ib2 = 1, nbdysegn
1475	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1476	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1477	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1478	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1479	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1480	! We have a possible North-West corner
1481	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1482	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1483	icornw(ib1,2) = npckgn(ib2)
1484	icornn(ib2,1) = npckgw(ib1)
1485	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1486	WRITE(ctmp1,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1487	& jpinft(ib2), jpjwdt(ib1)
1488	WRITE(ctmp2,*) ' ========== Not allowed yet'
1489	WRITE(ctmp3,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1490	& ' and North segment: ',npckgn(ib2)
1491	CALL ctl_stop( ' ', ctmp1, ctmp2, ctmp3, ' ' )
1492	ELSE
1493	WRITE(ctmp1,*) ' E R R O R : Check North and West Open boundary indices'
1494	WRITE(ctmp2,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1495	& ' and North segment: ',npckgn(ib2)
1496	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1497	END IF
1498	END IF
1499	END DO
1500	END DO
1501	END IF
1502	!
1503	! North/East crossings
1504	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1505	DO ib1 = 1, nbdysege
1506	DO ib2 = 1, nbdysegn
1507	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1508	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1509	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1510	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1511	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1512	! We have a possible North-East corner
1513	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1514	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1515	icorne(ib1,2) = npckgn(ib2)
1516	icornn(ib2,2) = npckge(ib1)
1517	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1518	WRITE(ctmp1,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1519	& jpindt(ib2), jpjedt(ib1)
1520	WRITE(ctmp2,*) ' ========== Not allowed yet'
1521	WRITE(ctmp3,*) ' Crossing problem with East segment: ',npckge(ib1), &
1522	& ' and North segment: ',npckgn(ib2)
1523	CALL ctl_stop( ' ', ctmp1, ctmp2, ctmp3, ' ' )
1524	ELSE
1525	WRITE(ctmp1,*) ' E R R O R : Check North and East Open boundary indices'
1526	WRITE(ctmp2,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1527	& ' and North segment: ',npckgn(ib2)
1528	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1529	END IF
1530	END IF
1531	END DO
1532	END DO
1533	END IF
1534	!
1535	! 3. Check if segment extremities are on land
1536	!--------------------------------------------
1537	!
1538	! West segments
1539	DO ib = 1, nbdysegw
1540	! get mask at boundary extremities:
1541	ztestmask(1:2)=0.
1542	DO ji = 1, jpi
1543	DO jj = 1, jpj
1544	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1545	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1546	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1547	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1548	END DO
1549	END DO
1550	CALL mpp_sum( 'bdyini', ztestmask, 2 ) ! sum over the global domain
1551
1552	IF (ztestmask(1)==1) THEN
1553	IF (icornw(ib,1)==0) THEN
1554	WRITE(ctmp1,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1555	WRITE(ctmp2,*) ' ========== does not start on land or on a corner'
1556	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1557	ELSE
1558	! This is a corner
1559	IF(lwp) WRITE(numout,*) 'Found a South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1560	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1561	itest=itest+1
1562	ENDIF
1563	ENDIF
1564	IF (ztestmask(2)==1) THEN
1565	IF (icornw(ib,2)==0) THEN
1566	WRITE(ctmp1,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1567	WRITE(ctmp2,*) ' ========== does not end on land or on a corner'
1568	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1569	ELSE
1570	! This is a corner
1571	IF(lwp) WRITE(numout,*) 'Found a North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1572	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1573	itest=itest+1
1574	ENDIF
1575	ENDIF
1576	END DO
1577	!
1578	! East segments
1579	DO ib = 1, nbdysege
1580	! get mask at boundary extremities:
1581	ztestmask(1:2)=0.
1582	DO ji = 1, jpi
1583	DO jj = 1, jpj
1584	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1585	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1586	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1587	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1588	END DO
1589	END DO
1590	CALL mpp_sum( 'bdyini', ztestmask, 2 ) ! sum over the global domain
1591
1592	IF (ztestmask(1)==1) THEN
1593	IF (icorne(ib,1)==0) THEN
1594	WRITE(ctmp1,*) ' E R R O R : Open boundary segment ', npckge(ib)
1595	WRITE(ctmp2,*) ' ========== does not start on land or on a corner'
1596	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1597	ELSE
1598	! This is a corner
1599	IF(lwp) WRITE(numout,*) 'Found a South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1600	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1601	itest=itest+1
1602	ENDIF
1603	ENDIF
1604	IF (ztestmask(2)==1) THEN
1605	IF (icorne(ib,2)==0) THEN
1606	WRITE(ctmp1,*) ' E R R O R : Open boundary segment ', npckge(ib)
1607	WRITE(ctmp2,*) ' ========== does not end on land or on a corner'
1608	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1609	ELSE
1610	! This is a corner
1611	IF(lwp) WRITE(numout,*) 'Found a North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1612	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1613	itest=itest+1
1614	ENDIF
1615	ENDIF
1616	END DO
1617	!
1618	! South segments
1619	DO ib = 1, nbdysegs
1620	! get mask at boundary extremities:
1621	ztestmask(1:2)=0.
1622	DO ji = 1, jpi
1623	DO jj = 1, jpj
1624	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1625	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1626	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1627	& ((ji + nimpp - 1) == jpisft(ib))) ztestmask(2)=tmask(ji,jj,1)
1628	END DO
1629	END DO
1630	CALL mpp_sum( 'bdyini', ztestmask, 2 ) ! sum over the global domain
1631
1632	IF ((ztestmask(1)==1).AND.(icorns(ib,1)==0)) THEN
1633	WRITE(ctmp1,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1634	WRITE(ctmp2,*) ' ========== does not start on land or on a corner'
1635	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1636	ENDIF
1637	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1638	WRITE(ctmp1,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1639	WRITE(ctmp2,*) ' ========== does not end on land or on a corner'
1640	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1641	ENDIF
1642	END DO
1643	!
1644	! North segments
1645	DO ib = 1, nbdysegn
1646	! get mask at boundary extremities:
1647	ztestmask(1:2)=0.
1648	DO ji = 1, jpi
1649	DO jj = 1, jpj
1650	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1651	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1652	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1653	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1654	END DO
1655	END DO
1656	CALL mpp_sum( 'bdyini', ztestmask, 2 ) ! sum over the global domain
1657
1658	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1659	WRITE(ctmp1,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1660	WRITE(ctmp2,*) ' ========== does not start on land'
1661	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1662	ENDIF
1663	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1664	WRITE(ctmp1,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1665	WRITE(ctmp2,*) ' ========== does not end on land'
1666	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1667	ENDIF
1668	END DO
1669	!
1670	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1671	!
1672	! Other tests TBD:
1673	! segments completly on land
1674	! optimized open boundary array length according to landmask
1675	! Nudging layers that overlap with interior domain
1676	!
1677	END SUBROUTINE bdy_ctl_seg
1678
1679
1680	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1681	!!----------------------------------------------------------------------
1682	!! * ROUTINE bdy_ctl_corn *
1683	!!
1684	!! ** Purpose : Check numerical schemes consistency between
1685	!! segments having a common corner
1686	!!
1687	!! ** Method :
1688	!!----------------------------------------------------------------------
1689	INTEGER, INTENT(in) :: ib1, ib2
1690	INTEGER :: itest
1691	!!----------------------------------------------------------------------
1692	itest = 0
1693
1694	IF( cn_dyn2d(ib1) /= cn_dyn2d(ib2) ) itest = itest + 1
1695	IF( cn_dyn3d(ib1) /= cn_dyn3d(ib2) ) itest = itest + 1
1696	IF( cn_tra (ib1) /= cn_tra (ib2) ) itest = itest + 1
1697	!
1698	IF( nn_dyn2d_dta(ib1) /= nn_dyn2d_dta(ib2) ) itest = itest + 1
1699	IF( nn_dyn3d_dta(ib1) /= nn_dyn3d_dta(ib2) ) itest = itest + 1
1700	IF( nn_tra_dta (ib1) /= nn_tra_dta (ib2) ) itest = itest + 1
1701	!
1702	IF( nn_rimwidth(ib1) /= nn_rimwidth(ib2) ) itest = itest + 1
1703	!
1704	IF( itest>0 ) THEN
1705	WRITE(ctmp1,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1706	WRITE(ctmp2,*) ' ========== have different open bdy schemes'
1707	CALL ctl_stop( ' ', ctmp1, ctmp2, ' ' )
1708	ENDIF
1709	!
1710	END SUBROUTINE bdy_ctl_corn
1711
1712	!!=================================================================================
1713	END MODULE bdyini

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