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bdyini.F90 in branches/2012/dev_MERGE_2012/NEMOGCM/NEMO/OPA_SRC/BDY – NEMO

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source: branches/2012/dev_MERGE_2012/NEMOGCM/NEMO/OPA_SRC/BDY/bdyini.F90 @ 3703

Last change on this file since 3703 was 3703, checked in by cbricaud, 12 years ago
split lines which are too long in some bdy routines
Property svn:keywords set to `Id`
File size: 74.1 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) Updates for the
15	!! optimization of BDY communications
16	!!----------------------------------------------------------------------
17	#if defined key_bdy
18	!!----------------------------------------------------------------------
19	!! 'key_bdy' Unstructured Open Boundary Conditions
20	!!----------------------------------------------------------------------
21	!! bdy_init : Initialization of unstructured open boundaries
22	!!----------------------------------------------------------------------
23	USE timing ! Timing
24	USE oce ! ocean dynamics and tracers variables
25	USE dom_oce ! ocean space and time domain
26	USE bdy_oce ! unstructured open boundary conditions
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 sbctide, ONLY: lk_tide ! Tidal forcing or not
32	USE phycst, ONLY: rday
33
34	IMPLICIT NONE
35	PRIVATE
36
37	PUBLIC bdy_init ! routine called in nemo_init
38
39	INTEGER, PARAMETER :: jp_nseg = 100
40	INTEGER, PARAMETER :: nrimmax = 20 ! maximum rimwidth in structured
41	! open boundary data files
42	! Straight open boundary segment parameters:
43	INTEGER :: nbdysege, nbdysegw, nbdysegn, nbdysegs
44	INTEGER, DIMENSION(jp_nseg) :: jpieob, jpjedt, jpjeft, npckge
45	INTEGER, DIMENSION(jp_nseg) :: jpiwob, jpjwdt, jpjwft, npckgw
46	INTEGER, DIMENSION(jp_nseg) :: jpjnob, jpindt, jpinft, npckgn
47	INTEGER, DIMENSION(jp_nseg) :: jpjsob, jpisdt, jpisft, npckgs
48	!!----------------------------------------------------------------------
49	!! NEMO/OPA 4.0 , NEMO Consortium (2011)
50	!! $Id$
51	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
52	!!----------------------------------------------------------------------
53	CONTAINS
54
55	SUBROUTINE bdy_init
56	!!----------------------------------------------------------------------
57	!! * ROUTINE bdy_init *
58	!!
59	!! ** Purpose : Initialization of the dynamics and tracer fields with
60	!! unstructured open boundaries.
61	!!
62	!! ** Method : Read initialization arrays (mask, indices) to identify
63	!! an unstructured open boundary
64	!!
65	!! ** Input : bdy_init.nc, input file for unstructured open boundaries
66	!!----------------------------------------------------------------------
67	! namelist variables
68	!-------------------
69	CHARACTER(LEN=80),DIMENSION(jpbgrd) :: clfile
70	CHARACTER(LEN=1) :: ctypebdy
71	INTEGER :: nbdyind, nbdybeg, nbdyend
72
73	! local variables
74	!-------------------
75	INTEGER :: ib_bdy, ii, ij, ik, igrd, ib, ir, iseg ! dummy loop indices
76	INTEGER :: icount, icountr, ibr_max, ilen1, ibm1 ! local integers
77	INTEGER :: iw, ie, is, in, inum, id_dummy ! - -
78	INTEGER :: igrd_start, igrd_end, jpbdta ! - -
79	INTEGER :: jpbdtau, jpbdtas ! - -
80	INTEGER :: ib_bdy1, ib_bdy2, ib1, ib2 ! - -
81	INTEGER, POINTER :: nbi, nbj, nbr ! short cuts
82	REAL , POINTER :: flagu, flagv ! - -
83	REAL(wp) :: zefl, zwfl, znfl, zsfl ! local scalars
84	INTEGER, DIMENSION (2) :: kdimsz
85	INTEGER, DIMENSION(jpbgrd,jp_bdy) :: nblendta ! Length of index arrays
86	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbidta, nbjdta ! Index arrays: i and j indices of bdy dta
87	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbrdta ! Discrete distance from rim points
88	CHARACTER(LEN=1),DIMENSION(jpbgrd) :: cgrid
89	INTEGER :: com_east, com_west, com_south, com_north ! Flags for boundaries sending
90	INTEGER :: com_east_b, com_west_b, com_south_b, com_north_b ! Flags for boundaries receiving
91	INTEGER :: iw_b(4), ie_b(4), is_b(4), in_b(4) ! Arrays for neighbours coordinates
92
93	!!
94	NAMELIST/nambdy/ nb_bdy, ln_coords_file, cn_coords_file, &
95	& ln_mask_file, cn_mask_file, nn_dyn2d, nn_dyn2d_dta, &
96	& nn_dyn3d, nn_dyn3d_dta, nn_tra, nn_tra_dta, &
97	& ln_tra_dmp, ln_dyn3d_dmp, rn_time_dmp, &
98	#if defined key_lim2
99	& nn_ice_lim2, nn_ice_lim2_dta, &
100	#endif
101	& ln_vol, nn_volctl, nn_rimwidth
102	!!
103	NAMELIST/nambdy_index/ ctypebdy, nbdyind, nbdybeg, nbdyend
104
105	!!----------------------------------------------------------------------
106
107	IF( nn_timing == 1 ) CALL timing_start('bdy_init')
108
109	IF( bdy_oce_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'bdy_init : unable to allocate oce arrays' )
110
111	IF(lwp) WRITE(numout,*)
112	IF(lwp) WRITE(numout,*) 'bdy_init : initialization of open boundaries'
113	IF(lwp) WRITE(numout,*) '~~~~~~~~'
114	!
115
116	IF( jperio /= 0 ) CALL ctl_stop( 'Cyclic or symmetric,', &
117	& ' and general open boundary condition are not compatible' )
118
119	cgrid= (/'t','u','v'/)
120
121	! -----------------------------------------
122	! Initialise and read namelist parameters
123	! -----------------------------------------
124
125	nb_bdy = 0
126	ln_coords_file(:) = .false.
127	cn_coords_file(:) = ''
128	ln_mask_file = .false.
129	cn_mask_file(:) = ''
130	nn_dyn2d(:) = 0
131	nn_dyn2d_dta(:) = -1 ! uninitialised flag
132	nn_dyn3d(:) = 0
133	nn_dyn3d_dta(:) = -1 ! uninitialised flag
134	nn_tra(:) = 0
135	nn_tra_dta(:) = -1 ! uninitialised flag
136	ln_tra_dmp(:) = .false.
137	ln_dyn3d_dmp(:) = .false.
138	rn_time_dmp(:) = 1.
139	#if defined key_lim2
140	nn_ice_lim2(:) = 0
141	nn_ice_lim2_dta(:)= -1 ! uninitialised flag
142	#endif
143	ln_vol = .false.
144	nn_volctl = -1 ! uninitialised flag
145	nn_rimwidth(:) = -1 ! uninitialised flag
146
147	REWIND( numnam )
148	READ ( numnam, nambdy )
149
150	! -----------------------------------------
151	! Check and write out namelist parameters
152	! -----------------------------------------
153	! ! control prints
154	IF(lwp) WRITE(numout,*) ' nambdy'
155
156	IF( nb_bdy .eq. 0 ) THEN
157	IF(lwp) WRITE(numout,*) 'nb_bdy = 0, NO OPEN BOUNDARIES APPLIED.'
158	ELSE
159	IF(lwp) WRITE(numout,*) 'Number of open boundary sets : ',nb_bdy
160	ENDIF
161
162	DO ib_bdy = 1,nb_bdy
163	IF(lwp) WRITE(numout,*) ' '
164	IF(lwp) WRITE(numout,*) '------ Open boundary data set ',ib_bdy,'------'
165
166	IF( ln_coords_file(ib_bdy) ) THEN
167	IF(lwp) WRITE(numout,*) 'Boundary definition read from file '//TRIM(cn_coords_file(ib_bdy))
168	ELSE
169	IF(lwp) WRITE(numout,*) 'Boundary defined in namelist.'
170	ENDIF
171	IF(lwp) WRITE(numout,*)
172
173	IF(lwp) WRITE(numout,*) 'Boundary conditions for barotropic solution: '
174	SELECT CASE( nn_dyn2d(ib_bdy) )
175	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
176	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
177	CASE(jp_flather) ; IF(lwp) WRITE(numout,*) ' Flather radiation condition'
178	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_dyn2d' )
179	END SELECT
180	IF( nn_dyn2d(ib_bdy) .gt. 0 ) THEN
181	SELECT CASE( nn_dyn2d_dta(ib_bdy) ) !
182	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
183	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
184	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' tidal harmonic forcing taken from file'
185	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' boundary data AND tidal harmonic forcing taken from files'
186	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn2d_dta must be between 0 and 3' )
187	END SELECT
188	IF (( nn_dyn2d_dta(ib_bdy) .ge. 2 ).AND.(.NOT.lk_tide)) THEN
189	CALL ctl_stop( 'You must activate key_tide to add tidal forcing at open boundaries' )
190	ENDIF
191	ENDIF
192	IF(lwp) WRITE(numout,*)
193
194	IF(lwp) WRITE(numout,*) 'Boundary conditions for baroclinic velocities: '
195	SELECT CASE( nn_dyn3d(ib_bdy) )
196	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
197	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
198	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' Specified value'
199	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' Zero baroclinic velocities (runoff case)'
200	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_dyn3d' )
201	END SELECT
202	IF( nn_dyn3d(ib_bdy) .gt. 0 ) THEN
203	SELECT CASE( nn_dyn3d_dta(ib_bdy) ) !
204	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
205	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
206	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn3d_dta must be 0 or 1' )
207	END SELECT
208	ENDIF
209
210	IF ( ln_dyn3d_dmp(ib_bdy) ) THEN
211	IF ( nn_dyn3d(ib_bdy).EQ.0 ) THEN
212	IF(lwp) WRITE(numout,*) 'No open boundary condition for baroclinic velocities: ln_dyn3d_dmp is set to .false.'
213	ln_dyn3d_dmp(ib_bdy)=.false.
214	ELSEIF ( nn_dyn3d(ib_bdy).EQ.1 ) THEN
215	CALL ctl_stop( 'Use FRS OR relaxation' )
216	ELSE
217	IF(lwp) WRITE(numout,*) ' + baroclinic velocities relaxation zone'
218	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
219	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
220	ENDIF
221	ELSE
222	IF(lwp) WRITE(numout,*) ' NO relaxation on baroclinic velocities'
223	ENDIF
224	IF(lwp) WRITE(numout,*)
225
226	IF(lwp) WRITE(numout,*) 'Boundary conditions for temperature and salinity: '
227	SELECT CASE( nn_tra(ib_bdy) )
228	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
229	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
230	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' Specified value'
231	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' Neumann conditions'
232	CASE( 4 ) ; IF(lwp) WRITE(numout,*) ' Runoff conditions : Neumann for T and specified to 0.1 for salinity'
233	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_tra' )
234	END SELECT
235	IF( nn_tra(ib_bdy) .gt. 0 ) THEN
236	SELECT CASE( nn_tra_dta(ib_bdy) ) !
237	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
238	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
239	CASE DEFAULT ; CALL ctl_stop( 'nn_tra_dta must be 0 or 1' )
240	END SELECT
241	ENDIF
242
243	IF ( ln_tra_dmp(ib_bdy) ) THEN
244	IF ( nn_tra(ib_bdy).EQ.0 ) THEN
245	IF(lwp) WRITE(numout,*) 'No open boundary condition for tracers: ln_tra_dmp is set to .false.'
246	ln_tra_dmp(ib_bdy)=.false.
247	ELSEIF ( nn_tra(ib_bdy).EQ.1 ) THEN
248	CALL ctl_stop( 'Use FRS OR relaxation' )
249	ELSE
250	IF(lwp) WRITE(numout,*) ' + T/S relaxation zone'
251	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
252	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
253	ENDIF
254	ELSE
255	IF(lwp) WRITE(numout,*) ' NO T/S relaxation'
256	ENDIF
257	IF(lwp) WRITE(numout,*)
258
259	#if defined key_lim2
260	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
261	SELECT CASE( nn_ice_lim2(ib_bdy) )
262	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
263	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
264	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_tra' )
265	END SELECT
266	IF( nn_ice_lim2(ib_bdy) .gt. 0 ) THEN
267	SELECT CASE( nn_ice_lim2_dta(ib_bdy) ) !
268	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
269	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
270	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_lim2_dta must be 0 or 1' )
271	END SELECT
272	ENDIF
273	IF(lwp) WRITE(numout,*)
274	#endif
275
276	IF(lwp) WRITE(numout,*) ' Width of relaxation zone = ', nn_rimwidth(ib_bdy)
277	IF(lwp) WRITE(numout,*)
278
279	ENDDO
280
281	IF (nb_bdy .gt. 0) THEN
282	IF( ln_vol ) THEN ! check volume conservation (nn_volctl value)
283	IF(lwp) WRITE(numout,*) 'Volume correction applied at open boundaries'
284	IF(lwp) WRITE(numout,*)
285	SELECT CASE ( nn_volctl )
286	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' The total volume will be constant'
287	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' The total volume will vary according to the surface E-P flux'
288	CASE DEFAULT ; CALL ctl_stop( 'nn_volctl must be 0 or 1' )
289	END SELECT
290	IF(lwp) WRITE(numout,*)
291	ELSE
292	IF(lwp) WRITE(numout,*) 'No volume correction applied at open boundaries'
293	IF(lwp) WRITE(numout,*)
294	ENDIF
295	ENDIF
296
297	! -------------------------------------------------
298	! Initialise indices arrays for open boundaries
299	! -------------------------------------------------
300
301	! Work out global dimensions of boundary data
302	! ---------------------------------------------
303	REWIND( numnam )
304
305	nblendta(:,:) = 0
306	nbdysege = 0
307	nbdysegw = 0
308	nbdysegn = 0
309	nbdysegs = 0
310	icount = 0 ! count user defined segments
311	! Dimensions below are used to allocate arrays to read external data
312	jpbdtas = 1 ! Maximum size of boundary data (structured case)
313	jpbdtau = 1 ! Maximum size of boundary data (unstructured case)
314
315	DO ib_bdy = 1, nb_bdy
316
317	IF( .NOT. ln_coords_file(ib_bdy) ) THEN ! Work out size of global arrays from namelist parameters
318
319	icount = icount + 1
320	! No REWIND here because may need to read more than one nambdy_index namelist.
321	READ ( numnam, nambdy_index )
322
323	SELECT CASE ( TRIM(ctypebdy) )
324	CASE( 'N' )
325	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
326	nbdyind = jpjglo - 2 ! set boundary to whole side of model domain.
327	nbdybeg = 2
328	nbdyend = jpiglo - 1
329	ENDIF
330	nbdysegn = nbdysegn + 1
331	npckgn(nbdysegn) = ib_bdy ! Save bdy package number
332	jpjnob(nbdysegn) = nbdyind
333	jpindt(nbdysegn) = nbdybeg
334	jpinft(nbdysegn) = nbdyend
335	!
336	CASE( 'S' )
337	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
338	nbdyind = 2 ! set boundary to whole side of model domain.
339	nbdybeg = 2
340	nbdyend = jpiglo - 1
341	ENDIF
342	nbdysegs = nbdysegs + 1
343	npckgs(nbdysegs) = ib_bdy ! Save bdy package number
344	jpjsob(nbdysegs) = nbdyind
345	jpisdt(nbdysegs) = nbdybeg
346	jpisft(nbdysegs) = nbdyend
347	!
348	CASE( 'E' )
349	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
350	nbdyind = jpiglo - 2 ! set boundary to whole side of model domain.
351	nbdybeg = 2
352	nbdyend = jpjglo - 1
353	ENDIF
354	nbdysege = nbdysege + 1
355	npckge(nbdysege) = ib_bdy ! Save bdy package number
356	jpieob(nbdysege) = nbdyind
357	jpjedt(nbdysege) = nbdybeg
358	jpjeft(nbdysege) = nbdyend
359	!
360	CASE( 'W' )
361	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
362	nbdyind = 2 ! set boundary to whole side of model domain.
363	nbdybeg = 2
364	nbdyend = jpjglo - 1
365	ENDIF
366	nbdysegw = nbdysegw + 1
367	npckgw(nbdysegw) = ib_bdy ! Save bdy package number
368	jpiwob(nbdysegw) = nbdyind
369	jpjwdt(nbdysegw) = nbdybeg
370	jpjwft(nbdysegw) = nbdyend
371	!
372	CASE DEFAULT ; CALL ctl_stop( 'ctypebdy must be N, S, E or W' )
373	END SELECT
374
375	! For simplicity we assume that in case of straight bdy, arrays have the same length
376	! (even if it is true that last tangential velocity points
377	! are useless). This simplifies a little bit boundary data format (and agrees with format
378	! used so far in obc package)
379
380	nblendta(1:jpbgrd,ib_bdy) = (nbdyend - nbdybeg + 1) * nn_rimwidth(ib_bdy)
381	jpbdtas = MAX(jpbdtas, (nbdyend - nbdybeg + 1))
382	IF (lwp.and.(nn_rimwidth(ib_bdy)>nrimmax)) &
383	& CALL ctl_stop( 'rimwidth must be lower than nrimmax' )
384
385	ELSE ! Read size of arrays in boundary coordinates file.
386	CALL iom_open( cn_coords_file(ib_bdy), inum )
387	DO igrd = 1, jpbgrd
388	id_dummy = iom_varid( inum, 'nbi'//cgrid(igrd), kdimsz=kdimsz )
389	nblendta(igrd,ib_bdy) = kdimsz(1)
390	jpbdtau = MAX(jpbdtau, kdimsz(1))
391	ENDDO
392	CALL iom_close( inum )
393
394	ENDIF
395
396	ENDDO ! ib_bdy
397
398	IF (nb_bdy>0) THEN
399	jpbdta = MAXVAL(nblendta(1:jpbgrd,1:nb_bdy))
400
401	! Allocate arrays
402	!---------------
403	ALLOCATE( nbidta(jpbdta, jpbgrd, nb_bdy), nbjdta(jpbdta, jpbgrd, nb_bdy), &
404	& nbrdta(jpbdta, jpbgrd, nb_bdy) )
405
406	ALLOCATE( dta_global(jpbdtau, 1, jpk) )
407	IF ( icount>0 ) ALLOCATE( dta_global2(jpbdtas, nrimmax, jpk) )
408	!
409	ENDIF
410
411	! Now look for crossings in user (namelist) defined open boundary segments:
412	!--------------------------------------------------------------------------
413	IF ( icount>0 ) CALL bdy_ctl_seg
414
415	! Calculate global boundary index arrays or read in from file
416	!------------------------------------------------------------
417	! 1. Read global index arrays from boundary coordinates file.
418	DO ib_bdy = 1, nb_bdy
419
420	IF( ln_coords_file(ib_bdy) ) THEN
421
422	CALL iom_open( cn_coords_file(ib_bdy), inum )
423	DO igrd = 1, jpbgrd
424	CALL iom_get( inum, jpdom_unknown, 'nbi'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
425	DO ii = 1,nblendta(igrd,ib_bdy)
426	nbidta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
427	END DO
428	CALL iom_get( inum, jpdom_unknown, 'nbj'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
429	DO ii = 1,nblendta(igrd,ib_bdy)
430	nbjdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
431	END DO
432	CALL iom_get( inum, jpdom_unknown, 'nbr'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
433	DO ii = 1,nblendta(igrd,ib_bdy)
434	nbrdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
435	END DO
436
437	ibr_max = MAXVAL( nbrdta(:,igrd,ib_bdy) )
438	IF(lwp) WRITE(numout,*)
439	IF(lwp) WRITE(numout,*) ' Maximum rimwidth in file is ', ibr_max
440	IF(lwp) WRITE(numout,*) ' nn_rimwidth from namelist is ', nn_rimwidth(ib_bdy)
441	IF (ibr_max < nn_rimwidth(ib_bdy)) &
442	CALL ctl_stop( 'nn_rimwidth is larger than maximum rimwidth in file',cn_coords_file(ib_bdy) )
443	END DO
444	CALL iom_close( inum )
445
446	ENDIF
447
448	ENDDO
449
450	! 2. Now fill indices corresponding to straight open boundary arrays:
451	! East
452	!-----
453	DO iseg = 1, nbdysege
454	ib_bdy = npckge(iseg)
455	!
456	! ------------ T points -------------
457	igrd=1
458	icount=0
459	DO ir = 1, nn_rimwidth(ib_bdy)
460	DO ij = jpjedt(iseg), jpjeft(iseg)
461	icount = icount + 1
462	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
463	nbjdta(icount, igrd, ib_bdy) = ij
464	nbrdta(icount, igrd, ib_bdy) = ir
465	ENDDO
466	ENDDO
467	!
468	! ------------ U points -------------
469	igrd=2
470	icount=0
471	DO ir = 1, nn_rimwidth(ib_bdy)
472	DO ij = jpjedt(iseg), jpjeft(iseg)
473	icount = icount + 1
474	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 1 - ir
475	nbjdta(icount, igrd, ib_bdy) = ij
476	nbrdta(icount, igrd, ib_bdy) = ir
477	ENDDO
478	ENDDO
479	!
480	! ------------ V points -------------
481	igrd=3
482	icount=0
483	DO ir = 1, nn_rimwidth(ib_bdy)
484	! DO ij = jpjedt(iseg), jpjeft(iseg) - 1
485	DO ij = jpjedt(iseg), jpjeft(iseg)
486	icount = icount + 1
487	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
488	nbjdta(icount, igrd, ib_bdy) = ij
489	nbrdta(icount, igrd, ib_bdy) = ir
490	ENDDO
491	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
492	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
493	ENDDO
494	ENDDO
495	!
496	! West
497	!-----
498	DO iseg = 1, nbdysegw
499	ib_bdy = npckgw(iseg)
500	!
501	! ------------ T points -------------
502	igrd=1
503	icount=0
504	DO ir = 1, nn_rimwidth(ib_bdy)
505	DO ij = jpjwdt(iseg), jpjwft(iseg)
506	icount = icount + 1
507	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
508	nbjdta(icount, igrd, ib_bdy) = ij
509	nbrdta(icount, igrd, ib_bdy) = ir
510	ENDDO
511	ENDDO
512	!
513	! ------------ U points -------------
514	igrd=2
515	icount=0
516	DO ir = 1, nn_rimwidth(ib_bdy)
517	DO ij = jpjwdt(iseg), jpjwft(iseg)
518	icount = icount + 1
519	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
520	nbjdta(icount, igrd, ib_bdy) = ij
521	nbrdta(icount, igrd, ib_bdy) = ir
522	ENDDO
523	ENDDO
524	!
525	! ------------ V points -------------
526	igrd=3
527	icount=0
528	DO ir = 1, nn_rimwidth(ib_bdy)
529	! DO ij = jpjwdt(iseg), jpjwft(iseg) - 1
530	DO ij = jpjwdt(iseg), jpjwft(iseg)
531	icount = icount + 1
532	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
533	nbjdta(icount, igrd, ib_bdy) = ij
534	nbrdta(icount, igrd, ib_bdy) = ir
535	ENDDO
536	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
537	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
538	ENDDO
539	ENDDO
540	!
541	! North
542	!-----
543	DO iseg = 1, nbdysegn
544	ib_bdy = npckgn(iseg)
545	!
546	! ------------ T points -------------
547	igrd=1
548	icount=0
549	DO ir = 1, nn_rimwidth(ib_bdy)
550	DO ii = jpindt(iseg), jpinft(iseg)
551	icount = icount + 1
552	nbidta(icount, igrd, ib_bdy) = ii
553	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
554	nbrdta(icount, igrd, ib_bdy) = ir
555	ENDDO
556	ENDDO
557	!
558	! ------------ U points -------------
559	igrd=2
560	icount=0
561	DO ir = 1, nn_rimwidth(ib_bdy)
562	! DO ii = jpindt(iseg), jpinft(iseg) - 1
563	DO ii = jpindt(iseg), jpinft(iseg)
564	icount = icount + 1
565	nbidta(icount, igrd, ib_bdy) = ii
566	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
567	nbrdta(icount, igrd, ib_bdy) = ir
568	ENDDO
569	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
570	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
571	ENDDO
572	!
573	! ------------ V points -------------
574	igrd=3
575	icount=0
576	DO ir = 1, nn_rimwidth(ib_bdy)
577	DO ii = jpindt(iseg), jpinft(iseg)
578	icount = icount + 1
579	nbidta(icount, igrd, ib_bdy) = ii
580	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 1 - ir
581	nbrdta(icount, igrd, ib_bdy) = ir
582	ENDDO
583	ENDDO
584	ENDDO
585	!
586	! South
587	!-----
588	DO iseg = 1, nbdysegs
589	ib_bdy = npckgs(iseg)
590	!
591	! ------------ T points -------------
592	igrd=1
593	icount=0
594	DO ir = 1, nn_rimwidth(ib_bdy)
595	DO ii = jpisdt(iseg), jpisft(iseg)
596	icount = icount + 1
597	nbidta(icount, igrd, ib_bdy) = ii
598	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
599	nbrdta(icount, igrd, ib_bdy) = ir
600	ENDDO
601	ENDDO
602	!
603	! ------------ U points -------------
604	igrd=2
605	icount=0
606	DO ir = 1, nn_rimwidth(ib_bdy)
607	! DO ii = jpisdt(iseg), jpisft(iseg) - 1
608	DO ii = jpisdt(iseg), jpisft(iseg)
609	icount = icount + 1
610	nbidta(icount, igrd, ib_bdy) = ii
611	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
612	nbrdta(icount, igrd, ib_bdy) = ir
613	ENDDO
614	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
615	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
616	ENDDO
617	!
618	! ------------ V points -------------
619	igrd=3
620	icount=0
621	DO ir = 1, nn_rimwidth(ib_bdy)
622	DO ii = jpisdt(iseg), jpisft(iseg)
623	icount = icount + 1
624	nbidta(icount, igrd, ib_bdy) = ii
625	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
626	nbrdta(icount, igrd, ib_bdy) = ir
627	ENDDO
628	ENDDO
629	ENDDO
630
631	! Deal with duplicated points
632	!-----------------------------
633	! We assign negative indices to duplicated points (to remove them from bdy points to be updated)
634	! if their distance to the bdy is greater than the other
635	! If their distance are the same, just keep only one to avoid updating a point twice
636	DO igrd = 1, jpbgrd
637	DO ib_bdy1 = 1, nb_bdy
638	DO ib_bdy2 = 1, nb_bdy
639	IF (ib_bdy1/=ib_bdy2) THEN
640	DO ib1 = 1, nblendta(igrd,ib_bdy1)
641	DO ib2 = 1, nblendta(igrd,ib_bdy2)
642	IF ((nbidta(ib1, igrd, ib_bdy1)==nbidta(ib2, igrd, ib_bdy2)).AND. &
643	& (nbjdta(ib1, igrd, ib_bdy1)==nbjdta(ib2, igrd, ib_bdy2))) THEN
644	! IF ((lwp).AND.(igrd==1)) WRITE(numout,*) ' found coincident point ji, jj:', &
645	! & nbidta(ib1, igrd, ib_bdy1), &
646	! & nbjdta(ib2, igrd, ib_bdy2)
647	! keep only points with the lowest distance to boundary:
648	IF (nbrdta(ib1, igrd, ib_bdy1)<nbrdta(ib2, igrd, ib_bdy2)) THEN
649	nbidta(ib2, igrd, ib_bdy2) =-ib_bdy2
650	nbjdta(ib2, igrd, ib_bdy2) =-ib_bdy2
651	ELSEIF (nbrdta(ib1, igrd, ib_bdy1)>nbrdta(ib2, igrd, ib_bdy2)) THEN
652	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
653	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
654	! Arbitrary choice if distances are the same:
655	ELSE
656	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
657	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
658	ENDIF
659	END IF
660	END DO
661	END DO
662	ENDIF
663	END DO
664	END DO
665	END DO
666
667	! Work out dimensions of boundary data on each processor
668	! ------------------------------------------------------
669
670	! Rather assume that boundary data indices are given on global domain
671	! TO BE DISCUSSED ?
672	! iw = mig(1) + 1 ! if monotasking and no zoom, iw=2
673	! ie = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
674	! is = mjg(1) + 1 ! if monotasking and no zoom, is=2
675	! in = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
676	iw = mig(1) - jpizoom + 2 ! if monotasking and no zoom, iw=2
677	ie = mig(1) + nlci - jpizoom - 1 ! if monotasking and no zoom, ie=jpim1
678	is = mjg(1) - jpjzoom + 2 ! if monotasking and no zoom, is=2
679	in = mjg(1) + nlcj - jpjzoom - 1 ! if monotasking and no zoom, in=jpjm1
680
681	ALLOCATE( nbondi_bdy(nb_bdy))
682	ALLOCATE( nbondj_bdy(nb_bdy))
683	nbondi_bdy(:)=2
684	nbondj_bdy(:)=2
685	ALLOCATE( nbondi_bdy_b(nb_bdy))
686	ALLOCATE( nbondj_bdy_b(nb_bdy))
687	nbondi_bdy_b(:)=2
688	nbondj_bdy_b(:)=2
689
690	! Work out dimensions of boundary data on each neighbour process
691	IF(nbondi .eq. 0) THEN
692	iw_b(1) = jpizoom + nimppt(nowe+1)
693	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
694	is_b(1) = jpjzoom + njmppt(nowe+1)
695	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
696
697	iw_b(2) = jpizoom + nimppt(noea+1)
698	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
699	is_b(2) = jpjzoom + njmppt(noea+1)
700	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
701	ELSEIF(nbondi .eq. 1) THEN
702	iw_b(1) = jpizoom + nimppt(nowe+1)
703	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
704	is_b(1) = jpjzoom + njmppt(nowe+1)
705	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
706	ELSEIF(nbondi .eq. -1) THEN
707	iw_b(2) = jpizoom + nimppt(noea+1)
708	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
709	is_b(2) = jpjzoom + njmppt(noea+1)
710	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
711	ENDIF
712
713	IF(nbondj .eq. 0) THEN
714	iw_b(3) = jpizoom + nimppt(noso+1)
715	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
716	is_b(3) = jpjzoom + njmppt(noso+1)
717	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
718
719	iw_b(4) = jpizoom + nimppt(nono+1)
720	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
721	is_b(4) = jpjzoom + njmppt(nono+1)
722	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
723	ELSEIF(nbondj .eq. 1) THEN
724	iw_b(3) = jpizoom + nimppt(noso+1)
725	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
726	is_b(3) = jpjzoom + njmppt(noso+1)
727	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
728	ELSEIF(nbondj .eq. -1) THEN
729	iw_b(4) = jpizoom + nimppt(nono+1)
730	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
731	is_b(4) = jpjzoom + njmppt(nono+1)
732	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
733	ENDIF
734
735	DO ib_bdy = 1, nb_bdy
736	DO igrd = 1, jpbgrd
737	icount = 0
738	icountr = 0
739	idx_bdy(ib_bdy)%nblen(igrd) = 0
740	idx_bdy(ib_bdy)%nblenrim(igrd) = 0
741	DO ib = 1, nblendta(igrd,ib_bdy)
742	! check that data is in correct order in file
743	ibm1 = MAX(1,ib-1)
744	IF(lwp) THEN ! Since all procs read global data only need to do this check on one proc...
745	IF( nbrdta(ib,igrd,ib_bdy) < nbrdta(ibm1,igrd,ib_bdy) ) THEN
746	CALL ctl_stop('bdy_init : ERROR : boundary data in file &
747	must be defined in order of distance from edge nbr.', &
748	'A utility for re-ordering boundary coordinates and data &
749	files exists in the TOOLS/OBC directory')
750	ENDIF
751	ENDIF
752	! check if point is in local domain
753	IF( nbidta(ib,igrd,ib_bdy) >= iw .AND. nbidta(ib,igrd,ib_bdy) <= ie .AND. &
754	& nbjdta(ib,igrd,ib_bdy) >= is .AND. nbjdta(ib,igrd,ib_bdy) <= in ) THEN
755	!
756	icount = icount + 1
757	!
758	IF( nbrdta(ib,igrd,ib_bdy) == 1 ) icountr = icountr+1
759	ENDIF
760	ENDDO
761	idx_bdy(ib_bdy)%nblenrim(igrd) = icountr !: length of rim boundary data on each proc
762	idx_bdy(ib_bdy)%nblen (igrd) = icount !: length of boundary data on each proc
763	ENDDO ! igrd
764
765	! Allocate index arrays for this boundary set
766	!--------------------------------------------
767	ilen1 = MAXVAL(idx_bdy(ib_bdy)%nblen(:))
768	ALLOCATE( idx_bdy(ib_bdy)%nbi(ilen1,jpbgrd) )
769	ALLOCATE( idx_bdy(ib_bdy)%nbj(ilen1,jpbgrd) )
770	ALLOCATE( idx_bdy(ib_bdy)%nbr(ilen1,jpbgrd) )
771	ALLOCATE( idx_bdy(ib_bdy)%nbd(ilen1,jpbgrd) )
772	ALLOCATE( idx_bdy(ib_bdy)%nbmap(ilen1,jpbgrd) )
773	ALLOCATE( idx_bdy(ib_bdy)%nbw(ilen1,jpbgrd) )
774	ALLOCATE( idx_bdy(ib_bdy)%flagu(ilen1) )
775	ALLOCATE( idx_bdy(ib_bdy)%flagv(ilen1) )
776
777	! Dispatch mapping indices and discrete distances on each processor
778	! -----------------------------------------------------------------
779
780	com_east = 0
781	com_west = 0
782	com_south = 0
783	com_north = 0
784
785	com_east_b = 0
786	com_west_b = 0
787	com_south_b = 0
788	com_north_b = 0
789	DO igrd = 1, jpbgrd
790	icount = 0
791	! Loop on rimwidth to ensure outermost points come first in the local arrays.
792	DO ir=1, nn_rimwidth(ib_bdy)
793	DO ib = 1, nblendta(igrd,ib_bdy)
794	! check if point is in local domain and equals ir
795	IF( nbidta(ib,igrd,ib_bdy) >= iw .AND. nbidta(ib,igrd,ib_bdy) <= ie .AND. &
796	& nbjdta(ib,igrd,ib_bdy) >= is .AND. nbjdta(ib,igrd,ib_bdy) <= in .AND. &
797	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
798	!
799	icount = icount + 1
800
801	! Rather assume that boundary data indices are given on global domain
802	! TO BE DISCUSSED ?
803	! idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
804	! idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
805	idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+jpizoom
806	idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+jpjzoom
807	! check if point has to be sent
808	ii = idx_bdy(ib_bdy)%nbi(icount,igrd)
809	ij = idx_bdy(ib_bdy)%nbj(icount,igrd)
810	if((com_east .ne. 1) .and. (ii .eq. (nlci-1)) .and. (nbondi .le. 0)) then
811	com_east = 1
812	elseif((com_west .ne. 1) .and. (ii .eq. 2) .and. (nbondi .ge. 0) .and. (nbondi .ne. 2)) then
813	com_west = 1
814	endif
815	if((com_south .ne. 1) .and. (ij .eq. 2) .and. (nbondj .ge. 0) .and. (nbondj .ne. 2)) then
816	com_south = 1
817	elseif((com_north .ne. 1) .and. (ij .eq. (nlcj-1)) .and. (nbondj .le. 0)) then
818	com_north = 1
819	endif
820	idx_bdy(ib_bdy)%nbr(icount,igrd) = nbrdta(ib,igrd,ib_bdy)
821	idx_bdy(ib_bdy)%nbmap(icount,igrd) = ib
822	ENDIF
823	! check if point has to be received from a neighbour
824	IF(nbondi .eq. 0) THEN
825	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
826	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
827	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
828	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
829	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
830	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
831	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
832	com_south = 1
833	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
834	com_north = 1
835	endif
836	com_west_b = 1
837	endif
838	ENDIF
839	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
840	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
841	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
842	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
843	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
844	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
845	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
846	com_south = 1
847	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
848	com_north = 1
849	endif
850	com_east_b = 1
851	endif
852	ENDIF
853	ELSEIF(nbondi .eq. 1) THEN
854	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
855	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
856	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
857	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
858	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
859	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
860	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
861	com_south = 1
862	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
863	com_north = 1
864	endif
865	com_west_b = 1
866	endif
867	ENDIF
868	ELSEIF(nbondi .eq. -1) THEN
869	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
870	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
871	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
872	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
873	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
874	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
875	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
876	com_south = 1
877	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
878	com_north = 1
879	endif
880	com_east_b = 1
881	endif
882	ENDIF
883	ENDIF
884	IF(nbondj .eq. 0) THEN
885	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
886	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
887	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
888	com_north_b = 1
889	ENDIF
890	IF(com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 &
891	&.OR. nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
892	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
893	com_south_b = 1
894	ENDIF
895	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
896	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
897	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
898	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
899	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
900	com_south_b = 1
901	endif
902	ENDIF
903	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
904	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
905	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
906	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
907	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
908	com_north_b = 1
909	endif
910	ENDIF
911	ELSEIF(nbondj .eq. 1) THEN
912	IF( com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 .OR. &
913	& nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
914	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
915	com_south_b = 1
916	ENDIF
917	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
918	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
919	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
920	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
921	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
922	com_south_b = 1
923	endif
924	ENDIF
925	ELSEIF(nbondj .eq. -1) THEN
926	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
927	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
928	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
929	com_north_b = 1
930	ENDIF
931	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
932	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
933	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
934	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
935	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
936	com_north_b = 1
937	endif
938	ENDIF
939	ENDIF
940	ENDDO
941	ENDDO
942	ENDDO
943	! definition of the i- and j- direction local boundaries arrays
944	! used for sending the boudaries
945	IF((com_east .eq. 1) .and. (com_west .eq. 1)) THEN
946	nbondi_bdy(ib_bdy) = 0
947	ELSEIF ((com_east .eq. 1) .and. (com_west .eq. 0)) THEN
948	nbondi_bdy(ib_bdy) = -1
949	ELSEIF ((com_east .eq. 0) .and. (com_west .eq. 1)) THEN
950	nbondi_bdy(ib_bdy) = 1
951	ENDIF
952
953	IF((com_north .eq. 1) .and. (com_south .eq. 1)) THEN
954	nbondj_bdy(ib_bdy) = 0
955	ELSEIF ((com_north .eq. 1) .and. (com_south .eq. 0)) THEN
956	nbondj_bdy(ib_bdy) = -1
957	ELSEIF ((com_north .eq. 0) .and. (com_south .eq. 1)) THEN
958	nbondj_bdy(ib_bdy) = 1
959	ENDIF
960
961	! definition of the i- and j- direction local boundaries arrays
962	! used for receiving the boudaries
963	IF((com_east_b .eq. 1) .and. (com_west_b .eq. 1)) THEN
964	nbondi_bdy_b(ib_bdy) = 0
965	ELSEIF ((com_east_b .eq. 1) .and. (com_west_b .eq. 0)) THEN
966	nbondi_bdy_b(ib_bdy) = -1
967	ELSEIF ((com_east_b .eq. 0) .and. (com_west_b .eq. 1)) THEN
968	nbondi_bdy_b(ib_bdy) = 1
969	ENDIF
970
971	IF((com_north_b .eq. 1) .and. (com_south_b .eq. 1)) THEN
972	nbondj_bdy_b(ib_bdy) = 0
973	ELSEIF ((com_north_b .eq. 1) .and. (com_south_b .eq. 0)) THEN
974	nbondj_bdy_b(ib_bdy) = -1
975	ELSEIF ((com_north_b .eq. 0) .and. (com_south_b .eq. 1)) THEN
976	nbondj_bdy_b(ib_bdy) = 1
977	ENDIF
978
979	! Compute rim weights for FRS scheme
980	! ----------------------------------
981	DO igrd = 1, jpbgrd
982	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
983	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
984	idx_bdy(ib_bdy)%nbw(ib,igrd) = 1.- TANH( FLOAT( nbr - 1 ) *0.5 ) ! tanh formulation
985	! idx_bdy(ib_bdy)%nbw(ib,igrd) = (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))**2. ! quadratic
986	! idx_bdy(ib_bdy)%nbw(ib,igrd) = FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)) ! linear
987	END DO
988	END DO
989
990	! Compute damping coefficients
991	! ----------------------------
992	DO igrd = 1, jpbgrd
993	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
994	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
995	idx_bdy(ib_bdy)%nbd(ib,igrd) = 1. / ( rn_time_dmp(ib_bdy) * rday ) &
996	& (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))*2. ! quadratic
997	END DO
998	END DO
999
1000	ENDDO
1001
1002	! ------------------------------------------------------
1003	! Initialise masks and find normal/tangential directions
1004	! ------------------------------------------------------
1005
1006	! Read global 2D mask at T-points: bdytmask
1007	! -----------------------------------------
1008	! bdytmask = 1 on the computational domain AND on open boundaries
1009	! = 0 elsewhere
1010
1011	IF( ln_mask_file ) THEN
1012	CALL iom_open( cn_mask_file, inum )
1013	CALL iom_get ( inum, jpdom_data, 'bdy_msk', bdytmask(:,:) )
1014	CALL iom_close( inum )
1015
1016	! Derive mask on U and V grid from mask on T grid
1017	bdyumask(:,:) = 0.e0
1018	bdyvmask(:,:) = 0.e0
1019	DO ij=1, jpjm1
1020	DO ii=1, jpim1
1021	bdyumask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii+1, ij )
1022	bdyvmask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii ,ij+1)
1023	END DO
1024	END DO
1025	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. ) ! Lateral boundary cond.
1026
1027
1028	! Mask corrections
1029	! ----------------
1030	DO ik = 1, jpkm1
1031	DO ij = 1, jpj
1032	DO ii = 1, jpi
1033	tmask(ii,ij,ik) = tmask(ii,ij,ik) * bdytmask(ii,ij)
1034	umask(ii,ij,ik) = umask(ii,ij,ik) * bdyumask(ii,ij)
1035	vmask(ii,ij,ik) = vmask(ii,ij,ik) * bdyvmask(ii,ij)
1036	bmask(ii,ij) = bmask(ii,ij) * bdytmask(ii,ij)
1037	END DO
1038	END DO
1039	END DO
1040
1041	DO ik = 1, jpkm1
1042	DO ij = 2, jpjm1
1043	DO ii = 2, jpim1
1044	fmask(ii,ij,ik) = fmask(ii,ij,ik) * bdytmask(ii,ij ) * bdytmask(ii+1,ij ) &
1045	& * bdytmask(ii,ij+1) * bdytmask(ii+1,ij+1)
1046	END DO
1047	END DO
1048	END DO
1049
1050	tmask_i (:,:) = tmask(:,:,1) * tmask_i(:,:)
1051
1052	ENDIF ! ln_mask_file=.TRUE.
1053
1054	bdytmask(:,:) = tmask(:,:,1)
1055
1056	! bdy masks and bmask are now set to zero on boundary points:
1057	igrd = 1 ! In the free surface case, bmask is at T-points
1058	DO ib_bdy = 1, nb_bdy
1059	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1060	bmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1061	ENDDO
1062	ENDDO
1063	!
1064	igrd = 1
1065	DO ib_bdy = 1, nb_bdy
1066	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1067	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1068	ENDDO
1069	ENDDO
1070	!
1071	igrd = 2
1072	DO ib_bdy = 1, nb_bdy
1073	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1074	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1075	ENDDO
1076	ENDDO
1077	!
1078	igrd = 3
1079	DO ib_bdy = 1, nb_bdy
1080	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1081	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1082	ENDDO
1083	ENDDO
1084
1085	! Lateral boundary conditions
1086	CALL lbc_lnk( fmask , 'F', 1. ) ; CALL lbc_lnk( bdytmask(:,:), 'T', 1. )
1087	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. )
1088
1089	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1090
1091	idx_bdy(ib_bdy)%flagu(:) = 0.e0
1092	idx_bdy(ib_bdy)%flagv(:) = 0.e0
1093	icount = 0
1094
1095	!flagu = -1 : u component is normal to the dynamical boundary but its direction is outward
1096	!flagu = 0 : u is tangential
1097	!flagu = 1 : u is normal to the boundary and is direction is inward
1098
1099	igrd = 2 ! u-component
1100	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1101	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1102	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1103	zefl = bdytmask(nbi ,nbj)
1104	zwfl = bdytmask(nbi+1,nbj)
1105	IF( zefl + zwfl == 2 ) THEN
1106	icount = icount + 1
1107	ELSE
1108	idx_bdy(ib_bdy)%flagu(ib)=-zefl+zwfl
1109	ENDIF
1110	END DO
1111
1112	!flagv = -1 : u component is normal to the dynamical boundary but its direction is outward
1113	!flagv = 0 : u is tangential
1114	!flagv = 1 : u is normal to the boundary and is direction is inward
1115
1116	igrd = 3 ! v-component
1117	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1118	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1119	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1120	znfl = bdytmask(nbi,nbj )
1121	zsfl = bdytmask(nbi,nbj+1)
1122	IF( znfl + zsfl == 2 ) THEN
1123	icount = icount + 1
1124	ELSE
1125	idx_bdy(ib_bdy)%flagv(ib) = -znfl + zsfl
1126	END IF
1127	END DO
1128
1129	IF( icount /= 0 ) THEN
1130	IF(lwp) WRITE(numout,*)
1131	IF(lwp) WRITE(numout,*) ' E R R O R : Some data velocity points,', &
1132	' are not boundary points. Check nbi, nbj, indices for boundary set ',ib_bdy
1133	IF(lwp) WRITE(numout,*) ' ========== '
1134	IF(lwp) WRITE(numout,*)
1135	nstop = nstop + 1
1136	ENDIF
1137
1138	ENDDO
1139
1140	! Compute total lateral surface for volume correction:
1141	! ----------------------------------------------------
1142	! JC: this must be done at each time step with key_vvl
1143	bdysurftot = 0.e0
1144	IF( ln_vol ) THEN
1145	igrd = 2 ! Lateral surface at U-points
1146	DO ib_bdy = 1, nb_bdy
1147	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1148	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1149	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1150	flagu => idx_bdy(ib_bdy)%flagu(ib)
1151	bdysurftot = bdysurftot + hu (nbi , nbj) &
1152	& * e2u (nbi , nbj) * ABS( flagu ) &
1153	& * tmask_i(nbi , nbj) &
1154	& * tmask_i(nbi+1, nbj)
1155	ENDDO
1156	ENDDO
1157
1158	igrd=3 ! Add lateral surface at V-points
1159	DO ib_bdy = 1, nb_bdy
1160	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1161	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1162	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1163	flagv => idx_bdy(ib_bdy)%flagv(ib)
1164	bdysurftot = bdysurftot + hv (nbi, nbj ) &
1165	& * e1v (nbi, nbj ) * ABS( flagv ) &
1166	& * tmask_i(nbi, nbj ) &
1167	& * tmask_i(nbi, nbj+1)
1168	ENDDO
1169	ENDDO
1170	!
1171	IF( lk_mpp ) CALL mpp_sum( bdysurftot ) ! sum over the global domain
1172	END IF
1173	!
1174	! Tidy up
1175	!--------
1176	IF (nb_bdy>0) THEN
1177	DEALLOCATE(nbidta, nbjdta, nbrdta)
1178	ENDIF
1179
1180	IF( nn_timing == 1 ) CALL timing_stop('bdy_init')
1181
1182	END SUBROUTINE bdy_init
1183
1184	SUBROUTINE bdy_ctl_seg
1185	!!----------------------------------------------------------------------
1186	!! * ROUTINE bdy_ctl_seg *
1187	!!
1188	!! ** Purpose : Check straight open boundary segments location
1189	!!
1190	!! ** Method : - Look for open boundary corners
1191	!! - Check that segments start or end on land
1192	!!----------------------------------------------------------------------
1193	INTEGER :: ib, ib1, ib2, ji ,jj, itest
1194	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1195	REAL(wp), DIMENSION(2) :: ztestmask
1196	!!----------------------------------------------------------------------
1197	!
1198	IF (lwp) WRITE(numout,*) ' '
1199	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1200	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1201	!
1202	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1203	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1204	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1205	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1206	! 1. Check bounds
1207	!----------------
1208	DO ib = 1, nbdysegn
1209	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1210	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1211	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1212	IF (jpindt(ib).ge.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1213	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1214	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1215	END DO
1216	!
1217	DO ib = 1, nbdysegs
1218	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1219	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1220	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1221	IF (jpisdt(ib).ge.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1222	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1223	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1224	END DO
1225	!
1226	DO ib = 1, nbdysege
1227	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1228	IF ((jpieob(ib).ge.jpiglo-1).or.&
1229	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1230	IF (jpjedt(ib).ge.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1231	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1232	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1233	END DO
1234	!
1235	DO ib = 1, nbdysegw
1236	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1237	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1238	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1239	IF (jpjwdt(ib).ge.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1240	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1241	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1242	ENDDO
1243	!
1244	!
1245	! 2. Look for segment crossings
1246	!------------------------------
1247	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1248	!
1249	itest = 0 ! corner number
1250	!
1251	! flag to detect if start or end of open boundary belongs to a corner
1252	! if not (=0), it must be on land.
1253	! if a corner is detected, save bdy package number for further tests
1254	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1255	! South/West crossings
1256	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1257	DO ib1 = 1, nbdysegw
1258	DO ib2 = 1, nbdysegs
1259	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1260	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1261	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1262	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1263	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1264	! We have a possible South-West corner
1265	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1266	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1267	icornw(ib1,1) = npckgs(ib2)
1268	icorns(ib2,1) = npckgw(ib1)
1269	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1270	IF(lwp) WRITE(numout,*)
1271	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1272	& jpisft(ib2), jpjwft(ib1)
1273	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1274	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1275	& ' and South segment: ',npckgs(ib2)
1276	IF(lwp) WRITE(numout,*)
1277	nstop = nstop + 1
1278	ELSE
1279	IF(lwp) WRITE(numout,*)
1280	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and West Open boundary indices'
1281	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1282	& ' and South segment: ',npckgs(ib2)
1283	IF(lwp) WRITE(numout,*)
1284	nstop = nstop+1
1285	END IF
1286	END IF
1287	END DO
1288	END DO
1289	END IF
1290	!
1291	! South/East crossings
1292	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1293	DO ib1 = 1, nbdysege
1294	DO ib2 = 1, nbdysegs
1295	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1296	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1297	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1298	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1299	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1300	! We have a possible South-East corner
1301	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1302	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1303	icorne(ib1,1) = npckgs(ib2)
1304	icorns(ib2,2) = npckge(ib1)
1305	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1306	IF(lwp) WRITE(numout,*)
1307	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1308	& jpisdt(ib2), jpjeft(ib1)
1309	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1310	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1311	& ' and South segment: ',npckgs(ib2)
1312	IF(lwp) WRITE(numout,*)
1313	nstop = nstop + 1
1314	ELSE
1315	IF(lwp) WRITE(numout,*)
1316	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and East Open boundary indices'
1317	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1318	& ' and South segment: ',npckgs(ib2)
1319	IF(lwp) WRITE(numout,*)
1320	nstop = nstop + 1
1321	END IF
1322	END IF
1323	END DO
1324	END DO
1325	END IF
1326	!
1327	! North/West crossings
1328	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1329	DO ib1 = 1, nbdysegw
1330	DO ib2 = 1, nbdysegn
1331	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1332	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1333	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1334	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1335	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1336	! We have a possible North-West corner
1337	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1338	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1339	icornw(ib1,2) = npckgn(ib2)
1340	icornn(ib2,1) = npckgw(ib1)
1341	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1342	IF(lwp) WRITE(numout,*)
1343	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1344	& jpinft(ib2), jpjwdt(ib1)
1345	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1346	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1347	& ' and North segment: ',npckgn(ib2)
1348	IF(lwp) WRITE(numout,*)
1349	nstop = nstop + 1
1350	ELSE
1351	IF(lwp) WRITE(numout,*)
1352	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and West Open boundary indices'
1353	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1354	& ' and North segment: ',npckgn(ib2)
1355	IF(lwp) WRITE(numout,*)
1356	nstop = nstop + 1
1357	END IF
1358	END IF
1359	END DO
1360	END DO
1361	END IF
1362	!
1363	! North/East crossings
1364	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1365	DO ib1 = 1, nbdysege
1366	DO ib2 = 1, nbdysegn
1367	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1368	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1369	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1370	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1371	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1372	! We have a possible North-East corner
1373	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1374	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1375	icorne(ib1,2) = npckgn(ib2)
1376	icornn(ib2,2) = npckge(ib1)
1377	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1378	IF(lwp) WRITE(numout,*)
1379	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1380	& jpindt(ib2), jpjedt(ib1)
1381	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1382	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1383	& ' and North segment: ',npckgn(ib2)
1384	IF(lwp) WRITE(numout,*)
1385	nstop = nstop + 1
1386	ELSE
1387	IF(lwp) WRITE(numout,*)
1388	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and East Open boundary indices'
1389	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1390	& ' and North segment: ',npckgn(ib2)
1391	IF(lwp) WRITE(numout,*)
1392	nstop = nstop + 1
1393	END IF
1394	END IF
1395	END DO
1396	END DO
1397	END IF
1398	!
1399	! 3. Check if segment extremities are on land
1400	!--------------------------------------------
1401	!
1402	! West segments
1403	DO ib = 1, nbdysegw
1404	! get mask at boundary extremities:
1405	ztestmask(1:2)=0.
1406	DO ji = 1, jpi
1407	DO jj = 1, jpj
1408	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1409	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1410	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1411	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1412	END DO
1413	END DO
1414	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1415
1416	IF (ztestmask(1)==1) THEN
1417	IF (icornw(ib,1)==0) THEN
1418	IF(lwp) WRITE(numout,*)
1419	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1420	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1421	IF(lwp) WRITE(numout,*)
1422	nstop = nstop + 1
1423	ELSE
1424	! This is a corner
1425	WRITE(numout,*) 'Found a South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1426	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1427	itest=itest+1
1428	ENDIF
1429	ENDIF
1430	IF (ztestmask(2)==1) THEN
1431	IF (icornw(ib,2)==0) THEN
1432	IF(lwp) WRITE(numout,*)
1433	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1434	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1435	IF(lwp) WRITE(numout,*)
1436	nstop = nstop + 1
1437	ELSE
1438	! This is a corner
1439	WRITE(numout,*) 'Found a North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1440	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1441	itest=itest+1
1442	ENDIF
1443	ENDIF
1444	END DO
1445	!
1446	! East segments
1447	DO ib = 1, nbdysege
1448	! get mask at boundary extremities:
1449	ztestmask(1:2)=0.
1450	DO ji = 1, jpi
1451	DO jj = 1, jpj
1452	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1453	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1454	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1455	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1456	END DO
1457	END DO
1458	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1459
1460	IF (ztestmask(1)==1) THEN
1461	IF (icorne(ib,1)==0) THEN
1462	IF(lwp) WRITE(numout,*)
1463	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1464	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1465	IF(lwp) WRITE(numout,*)
1466	nstop = nstop + 1
1467	ELSE
1468	! This is a corner
1469	WRITE(numout,*) 'Found a South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1470	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1471	itest=itest+1
1472	ENDIF
1473	ENDIF
1474	IF (ztestmask(2)==1) THEN
1475	IF (icorne(ib,2)==0) THEN
1476	IF(lwp) WRITE(numout,*)
1477	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1478	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1479	IF(lwp) WRITE(numout,*)
1480	nstop = nstop + 1
1481	ELSE
1482	! This is a corner
1483	WRITE(numout,*) 'Found a North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1484	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1485	itest=itest+1
1486	ENDIF
1487	ENDIF
1488	END DO
1489	!
1490	! South segments
1491	DO ib = 1, nbdysegs
1492	! get mask at boundary extremities:
1493	ztestmask(1:2)=0.
1494	DO ji = 1, jpi
1495	DO jj = 1, jpj
1496	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1497	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1498	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1499	& ((ji + nimpp - 1) == jpisft(ib))) ztestmask(2)=tmask(ji,jj,1)
1500	END DO
1501	END DO
1502	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1503
1504	IF ((ztestmask(1)==1).AND.(icorns(ib,1)==0)) THEN
1505	IF(lwp) WRITE(numout,*)
1506	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1507	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1508	IF(lwp) WRITE(numout,*)
1509	nstop = nstop + 1
1510	ENDIF
1511	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1512	IF(lwp) WRITE(numout,*)
1513	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1514	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1515	IF(lwp) WRITE(numout,*)
1516	nstop = nstop + 1
1517	ENDIF
1518	END DO
1519	!
1520	! North segments
1521	DO ib = 1, nbdysegn
1522	! get mask at boundary extremities:
1523	ztestmask(1:2)=0.
1524	DO ji = 1, jpi
1525	DO jj = 1, jpj
1526	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1527	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1528	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1529	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1530	END DO
1531	END DO
1532	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1533
1534	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1535	IF(lwp) WRITE(numout,*)
1536	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1537	IF(lwp) WRITE(numout,*) ' ========== does not start on land'
1538	IF(lwp) WRITE(numout,*)
1539	nstop = nstop + 1
1540	ENDIF
1541	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1542	IF(lwp) WRITE(numout,*)
1543	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1544	IF(lwp) WRITE(numout,*) ' ========== does not end on land'
1545	IF(lwp) WRITE(numout,*)
1546	nstop = nstop + 1
1547	ENDIF
1548	END DO
1549	!
1550	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1551	!
1552	! Other tests TBD:
1553	! segments completly on land
1554	! optimized open boundary array length according to landmask
1555	! Nudging layers that overlap with interior domain
1556	!
1557	END SUBROUTINE bdy_ctl_seg
1558
1559	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1560	!!----------------------------------------------------------------------
1561	!! * ROUTINE bdy_ctl_corn *
1562	!!
1563	!! ** Purpose : Check numerical schemes consistency between
1564	!! segments having a common corner
1565	!!
1566	!! ** Method :
1567	!!----------------------------------------------------------------------
1568	INTEGER, INTENT(in) :: ib1, ib2
1569	INTEGER :: itest
1570	!!----------------------------------------------------------------------
1571	itest = 0
1572
1573	IF (nn_dyn2d(ib1)/=nn_dyn2d(ib2)) itest = itest + 1
1574	IF (nn_dyn3d(ib1)/=nn_dyn3d(ib2)) itest = itest + 1
1575	IF (nn_tra(ib1)/=nn_tra(ib2)) itest = itest + 1
1576	!
1577	IF (nn_dyn2d_dta(ib1)/=nn_dyn2d_dta(ib2)) itest = itest + 1
1578	IF (nn_dyn3d_dta(ib1)/=nn_dyn3d_dta(ib2)) itest = itest + 1
1579	IF (nn_tra_dta(ib1)/=nn_tra_dta(ib2)) itest = itest + 1
1580	!
1581	IF (nn_rimwidth(ib1)/=nn_rimwidth(ib2)) itest = itest + 1
1582	!
1583	IF ( itest>0 ) THEN
1584	IF(lwp) WRITE(numout,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1585	IF(lwp) WRITE(numout,*) ' ========== have different open bdy schemes'
1586	IF(lwp) WRITE(numout,*)
1587	nstop = nstop + 1
1588	ENDIF
1589	!
1590	END SUBROUTINE bdy_ctl_corn
1591
1592	#else
1593	!!---------------------------------------------------------------------------------
1594	!! Dummy module NO open boundaries
1595	!!---------------------------------------------------------------------------------
1596	CONTAINS
1597	SUBROUTINE bdy_init ! Dummy routine
1598	END SUBROUTINE bdy_init
1599	#endif
1600
1601	!!=================================================================================
1602	END MODULE bdyini

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