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bdyini.F90 in branches/2013/dev_r3867_MERCATOR1_DYN/NEMOGCM/NEMO/OPA_SRC/BDY – NEMO

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source: branches/2013/dev_r3867_MERCATOR1_DYN/NEMOGCM/NEMO/OPA_SRC/BDY/bdyini.F90 @ 3970

Last change on this file since 3970 was 3970, checked in by cbricaud, 11 years ago
Time splitting update, see ticket #1079
Property svn:keywords set to `Id`
File size: 74.6 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) 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	icount = 0 ! flag to set max rimwidth to 1 if no relaxation
164	IF(lwp) WRITE(numout,*) ' '
165	IF(lwp) WRITE(numout,*) '------ Open boundary data set ',ib_bdy,'------'
166
167	IF( ln_coords_file(ib_bdy) ) THEN
168	IF(lwp) WRITE(numout,*) 'Boundary definition read from file '//TRIM(cn_coords_file(ib_bdy))
169	ELSE
170	IF(lwp) WRITE(numout,*) 'Boundary defined in namelist.'
171	ENDIF
172	IF(lwp) WRITE(numout,*)
173
174	IF(lwp) WRITE(numout,*) 'Boundary conditions for barotropic solution: '
175	SELECT CASE( nn_dyn2d(ib_bdy) )
176	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
177	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
178	icount = icount + 1
179	CASE(jp_flather) ; IF(lwp) WRITE(numout,*) ' Flather radiation condition'
180	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_dyn2d' )
181	END SELECT
182	IF( nn_dyn2d(ib_bdy) .gt. 0 ) THEN
183	SELECT CASE( nn_dyn2d_dta(ib_bdy) ) !
184	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
185	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
186	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' tidal harmonic forcing taken from file'
187	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' boundary data AND tidal harmonic forcing taken from files'
188	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn2d_dta must be between 0 and 3' )
189	END SELECT
190	IF (( nn_dyn2d_dta(ib_bdy) .ge. 2 ).AND.(.NOT.lk_tide)) THEN
191	CALL ctl_stop( 'You must activate key_tide to add tidal forcing at open boundaries' )
192	ENDIF
193	ENDIF
194	IF(lwp) WRITE(numout,*)
195
196	IF(lwp) WRITE(numout,*) 'Boundary conditions for baroclinic velocities: '
197	SELECT CASE( nn_dyn3d(ib_bdy) )
198	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
199	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
200	icount = icount + 1
201	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' Specified value'
202	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' Zero baroclinic velocities (runoff case)'
203	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_dyn3d' )
204	END SELECT
205	IF( nn_dyn3d(ib_bdy) .gt. 0 ) THEN
206	SELECT CASE( nn_dyn3d_dta(ib_bdy) ) !
207	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
208	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
209	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn3d_dta must be 0 or 1' )
210	END SELECT
211	ENDIF
212
213	IF ( ln_dyn3d_dmp(ib_bdy) ) THEN
214	IF ( nn_dyn3d(ib_bdy).EQ.0 ) THEN
215	IF(lwp) WRITE(numout,*) 'No open boundary condition for baroclinic velocities: ln_dyn3d_dmp is set to .false.'
216	ln_dyn3d_dmp(ib_bdy)=.false.
217	ELSEIF ( nn_dyn3d(ib_bdy).EQ.1 ) THEN
218	CALL ctl_stop( 'Use FRS OR relaxation' )
219	ELSE
220	icount = icount + 1
221	IF(lwp) WRITE(numout,*) ' + baroclinic velocities relaxation zone'
222	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
223	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
224	ENDIF
225	ELSE
226	IF(lwp) WRITE(numout,*) ' NO relaxation on baroclinic velocities'
227	ENDIF
228	IF(lwp) WRITE(numout,*)
229
230	IF(lwp) WRITE(numout,*) 'Boundary conditions for temperature and salinity: '
231	SELECT CASE( nn_tra(ib_bdy) )
232	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
233	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
234	icount = icount + 1
235	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' Specified value'
236	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' Neumann conditions'
237	CASE( 4 ) ; IF(lwp) WRITE(numout,*) ' Runoff conditions : Neumann for T and specified to 0.1 for salinity'
238	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_tra' )
239	END SELECT
240	IF( nn_tra(ib_bdy) .gt. 0 ) THEN
241	SELECT CASE( nn_tra_dta(ib_bdy) ) !
242	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
243	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
244	CASE DEFAULT ; CALL ctl_stop( 'nn_tra_dta must be 0 or 1' )
245	END SELECT
246	ENDIF
247
248	IF ( ln_tra_dmp(ib_bdy) ) THEN
249	IF ( nn_tra(ib_bdy).EQ.0 ) THEN
250	IF(lwp) WRITE(numout,*) 'No open boundary condition for tracers: ln_tra_dmp is set to .false.'
251	ln_tra_dmp(ib_bdy)=.false.
252	ELSEIF ( nn_tra(ib_bdy).EQ.1 ) THEN
253	CALL ctl_stop( 'Use FRS OR relaxation' )
254	ELSE
255	icount = icount + 1
256	IF(lwp) WRITE(numout,*) ' + T/S relaxation zone'
257	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
258	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
259	ENDIF
260	ELSE
261	IF(lwp) WRITE(numout,*) ' NO T/S relaxation'
262	ENDIF
263	IF(lwp) WRITE(numout,*)
264
265	#if defined key_lim2
266	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
267	SELECT CASE( nn_ice_lim2(ib_bdy) )
268	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
269	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
270	icount = icount + 1
271	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_tra' )
272	END SELECT
273	IF( nn_ice_lim2(ib_bdy) .gt. 0 ) THEN
274	SELECT CASE( nn_ice_lim2_dta(ib_bdy) ) !
275	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
276	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
277	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_lim2_dta must be 0 or 1' )
278	END SELECT
279	ENDIF
280	IF(lwp) WRITE(numout,*)
281	#endif
282	IF ( icount>0 ) THEN
283	IF(lwp) WRITE(numout,*) ' Width of relaxation zone = ', nn_rimwidth(ib_bdy)
284	IF(lwp) WRITE(numout,*)
285	ELSE
286	nn_rimwidth(ib_bdy) = 1 ! no relaxation
287	ENDIF
288
289	ENDDO
290
291	IF (nb_bdy .gt. 0) THEN
292	IF( ln_vol ) THEN ! check volume conservation (nn_volctl value)
293	IF(lwp) WRITE(numout,*) 'Volume correction applied at open boundaries'
294	IF(lwp) WRITE(numout,*)
295	SELECT CASE ( nn_volctl )
296	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' The total volume will be constant'
297	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' The total volume will vary according to the surface E-P flux'
298	CASE DEFAULT ; CALL ctl_stop( 'nn_volctl must be 0 or 1' )
299	END SELECT
300	IF(lwp) WRITE(numout,*)
301	ELSE
302	IF(lwp) WRITE(numout,*) 'No volume correction applied at open boundaries'
303	IF(lwp) WRITE(numout,*)
304	ENDIF
305	ENDIF
306
307	! -------------------------------------------------
308	! Initialise indices arrays for open boundaries
309	! -------------------------------------------------
310
311	! Work out global dimensions of boundary data
312	! ---------------------------------------------
313	REWIND( numnam )
314
315	nblendta(:,:) = 0
316	nbdysege = 0
317	nbdysegw = 0
318	nbdysegn = 0
319	nbdysegs = 0
320	icount = 0 ! count user defined segments
321	! Dimensions below are used to allocate arrays to read external data
322	jpbdtas = 1 ! Maximum size of boundary data (structured case)
323	jpbdtau = 1 ! Maximum size of boundary data (unstructured case)
324
325	DO ib_bdy = 1, nb_bdy
326
327	IF( .NOT. ln_coords_file(ib_bdy) ) THEN ! Work out size of global arrays from namelist parameters
328
329	icount = icount + 1
330	! No REWIND here because may need to read more than one nambdy_index namelist.
331	READ ( numnam, nambdy_index )
332
333	SELECT CASE ( TRIM(ctypebdy) )
334	CASE( 'N' )
335	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
336	nbdyind = jpjglo - 2 ! set boundary to whole side of model domain.
337	nbdybeg = 2
338	nbdyend = jpiglo - 1
339	ENDIF
340	nbdysegn = nbdysegn + 1
341	npckgn(nbdysegn) = ib_bdy ! Save bdy package number
342	jpjnob(nbdysegn) = nbdyind
343	jpindt(nbdysegn) = nbdybeg
344	jpinft(nbdysegn) = nbdyend
345	!
346	CASE( 'S' )
347	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
348	nbdyind = 2 ! set boundary to whole side of model domain.
349	nbdybeg = 2
350	nbdyend = jpiglo - 1
351	ENDIF
352	nbdysegs = nbdysegs + 1
353	npckgs(nbdysegs) = ib_bdy ! Save bdy package number
354	jpjsob(nbdysegs) = nbdyind
355	jpisdt(nbdysegs) = nbdybeg
356	jpisft(nbdysegs) = nbdyend
357	!
358	CASE( 'E' )
359	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
360	nbdyind = jpiglo - 2 ! set boundary to whole side of model domain.
361	nbdybeg = 2
362	nbdyend = jpjglo - 1
363	ENDIF
364	nbdysege = nbdysege + 1
365	npckge(nbdysege) = ib_bdy ! Save bdy package number
366	jpieob(nbdysege) = nbdyind
367	jpjedt(nbdysege) = nbdybeg
368	jpjeft(nbdysege) = nbdyend
369	!
370	CASE( 'W' )
371	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
372	nbdyind = 2 ! set boundary to whole side of model domain.
373	nbdybeg = 2
374	nbdyend = jpjglo - 1
375	ENDIF
376	nbdysegw = nbdysegw + 1
377	npckgw(nbdysegw) = ib_bdy ! Save bdy package number
378	jpiwob(nbdysegw) = nbdyind
379	jpjwdt(nbdysegw) = nbdybeg
380	jpjwft(nbdysegw) = nbdyend
381	!
382	CASE DEFAULT ; CALL ctl_stop( 'ctypebdy must be N, S, E or W' )
383	END SELECT
384
385	! For simplicity we assume that in case of straight bdy, arrays have the same length
386	! (even if it is true that last tangential velocity points
387	! are useless). This simplifies a little bit boundary data format (and agrees with format
388	! used so far in obc package)
389
390	nblendta(1:jpbgrd,ib_bdy) = (nbdyend - nbdybeg + 1) * nn_rimwidth(ib_bdy)
391	jpbdtas = MAX(jpbdtas, (nbdyend - nbdybeg + 1))
392	IF (lwp.and.(nn_rimwidth(ib_bdy)>nrimmax)) &
393	& CALL ctl_stop( 'rimwidth must be lower than nrimmax' )
394
395	ELSE ! Read size of arrays in boundary coordinates file.
396	CALL iom_open( cn_coords_file(ib_bdy), inum )
397	DO igrd = 1, jpbgrd
398	id_dummy = iom_varid( inum, 'nbi'//cgrid(igrd), kdimsz=kdimsz )
399	nblendta(igrd,ib_bdy) = kdimsz(1)
400	jpbdtau = MAX(jpbdtau, kdimsz(1))
401	ENDDO
402	CALL iom_close( inum )
403	ENDIF
404
405	ENDDO ! ib_bdy
406
407	IF (nb_bdy>0) THEN
408	jpbdta = MAXVAL(nblendta(1:jpbgrd,1:nb_bdy))
409	! Allocate arrays
410	!---------------
411	ALLOCATE( nbidta(jpbdta, jpbgrd, nb_bdy), nbjdta(jpbdta, jpbgrd, nb_bdy), &
412	& nbrdta(jpbdta, jpbgrd, nb_bdy) )
413
414	ALLOCATE( dta_global(jpbdtau, 1, jpk) )
415	IF ( icount>0 ) ALLOCATE( dta_global2(jpbdtas, nrimmax, jpk) )
416	!
417	ENDIF
418
419	! Now look for crossings in user (namelist) defined open boundary segments:
420	!--------------------------------------------------------------------------
421	IF ( icount>0 ) CALL bdy_ctl_seg
422
423	! Calculate global boundary index arrays or read in from file
424	!------------------------------------------------------------
425	! 1. Read global index arrays from boundary coordinates file.
426	DO ib_bdy = 1, nb_bdy
427
428	IF( ln_coords_file(ib_bdy) ) THEN
429
430	CALL iom_open( cn_coords_file(ib_bdy), inum )
431	DO igrd = 1, jpbgrd
432	CALL iom_get( inum, jpdom_unknown, 'nbi'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
433	DO ii = 1,nblendta(igrd,ib_bdy)
434	nbidta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
435	END DO
436	CALL iom_get( inum, jpdom_unknown, 'nbj'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
437	DO ii = 1,nblendta(igrd,ib_bdy)
438	nbjdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
439	END DO
440	CALL iom_get( inum, jpdom_unknown, 'nbr'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
441	DO ii = 1,nblendta(igrd,ib_bdy)
442	nbrdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
443	END DO
444
445	ibr_max = MAXVAL( nbrdta(:,igrd,ib_bdy) )
446	IF(lwp) WRITE(numout,*)
447	IF(lwp) WRITE(numout,*) ' Maximum rimwidth in file is ', ibr_max
448	IF(lwp) WRITE(numout,*) ' nn_rimwidth from namelist is ', nn_rimwidth(ib_bdy)
449	IF (ibr_max < nn_rimwidth(ib_bdy)) &
450	CALL ctl_stop( 'nn_rimwidth is larger than maximum rimwidth in file',cn_coords_file(ib_bdy) )
451	END DO
452	CALL iom_close( inum )
453
454	ENDIF
455
456	ENDDO
457
458	! 2. Now fill indices corresponding to straight open boundary arrays:
459	! East
460	!-----
461	DO iseg = 1, nbdysege
462	ib_bdy = npckge(iseg)
463	!
464	! ------------ T points -------------
465	igrd=1
466	icount=0
467	DO ir = 1, nn_rimwidth(ib_bdy)
468	DO ij = jpjedt(iseg), jpjeft(iseg)
469	icount = icount + 1
470	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
471	nbjdta(icount, igrd, ib_bdy) = ij
472	nbrdta(icount, igrd, ib_bdy) = ir
473	ENDDO
474	ENDDO
475	!
476	! ------------ U points -------------
477	igrd=2
478	icount=0
479	DO ir = 1, nn_rimwidth(ib_bdy)
480	DO ij = jpjedt(iseg), jpjeft(iseg)
481	icount = icount + 1
482	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 1 - ir
483	nbjdta(icount, igrd, ib_bdy) = ij
484	nbrdta(icount, igrd, ib_bdy) = ir
485	ENDDO
486	ENDDO
487	!
488	! ------------ V points -------------
489	igrd=3
490	icount=0
491	DO ir = 1, nn_rimwidth(ib_bdy)
492	! DO ij = jpjedt(iseg), jpjeft(iseg) - 1
493	DO ij = jpjedt(iseg), jpjeft(iseg)
494	icount = icount + 1
495	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
496	nbjdta(icount, igrd, ib_bdy) = ij
497	nbrdta(icount, igrd, ib_bdy) = ir
498	ENDDO
499	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
500	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
501	ENDDO
502	ENDDO
503	!
504	! West
505	!-----
506	DO iseg = 1, nbdysegw
507	ib_bdy = npckgw(iseg)
508	!
509	! ------------ T points -------------
510	igrd=1
511	icount=0
512	DO ir = 1, nn_rimwidth(ib_bdy)
513	DO ij = jpjwdt(iseg), jpjwft(iseg)
514	icount = icount + 1
515	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
516	nbjdta(icount, igrd, ib_bdy) = ij
517	nbrdta(icount, igrd, ib_bdy) = ir
518	ENDDO
519	ENDDO
520	!
521	! ------------ U points -------------
522	igrd=2
523	icount=0
524	DO ir = 1, nn_rimwidth(ib_bdy)
525	DO ij = jpjwdt(iseg), jpjwft(iseg)
526	icount = icount + 1
527	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
528	nbjdta(icount, igrd, ib_bdy) = ij
529	nbrdta(icount, igrd, ib_bdy) = ir
530	ENDDO
531	ENDDO
532	!
533	! ------------ V points -------------
534	igrd=3
535	icount=0
536	DO ir = 1, nn_rimwidth(ib_bdy)
537	! DO ij = jpjwdt(iseg), jpjwft(iseg) - 1
538	DO ij = jpjwdt(iseg), jpjwft(iseg)
539	icount = icount + 1
540	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
541	nbjdta(icount, igrd, ib_bdy) = ij
542	nbrdta(icount, igrd, ib_bdy) = ir
543	ENDDO
544	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
545	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
546	ENDDO
547	ENDDO
548	!
549	! North
550	!-----
551	DO iseg = 1, nbdysegn
552	ib_bdy = npckgn(iseg)
553	!
554	! ------------ T points -------------
555	igrd=1
556	icount=0
557	DO ir = 1, nn_rimwidth(ib_bdy)
558	DO ii = jpindt(iseg), jpinft(iseg)
559	icount = icount + 1
560	nbidta(icount, igrd, ib_bdy) = ii
561	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
562	nbrdta(icount, igrd, ib_bdy) = ir
563	ENDDO
564	ENDDO
565	!
566	! ------------ U points -------------
567	igrd=2
568	icount=0
569	DO ir = 1, nn_rimwidth(ib_bdy)
570	! DO ii = jpindt(iseg), jpinft(iseg) - 1
571	DO ii = jpindt(iseg), jpinft(iseg)
572	icount = icount + 1
573	nbidta(icount, igrd, ib_bdy) = ii
574	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
575	nbrdta(icount, igrd, ib_bdy) = ir
576	ENDDO
577	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
578	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
579	ENDDO
580	!
581	! ------------ V points -------------
582	igrd=3
583	icount=0
584	DO ir = 1, nn_rimwidth(ib_bdy)
585	DO ii = jpindt(iseg), jpinft(iseg)
586	icount = icount + 1
587	nbidta(icount, igrd, ib_bdy) = ii
588	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 1 - ir
589	nbrdta(icount, igrd, ib_bdy) = ir
590	ENDDO
591	ENDDO
592	ENDDO
593	!
594	! South
595	!-----
596	DO iseg = 1, nbdysegs
597	ib_bdy = npckgs(iseg)
598	!
599	! ------------ T points -------------
600	igrd=1
601	icount=0
602	DO ir = 1, nn_rimwidth(ib_bdy)
603	DO ii = jpisdt(iseg), jpisft(iseg)
604	icount = icount + 1
605	nbidta(icount, igrd, ib_bdy) = ii
606	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
607	nbrdta(icount, igrd, ib_bdy) = ir
608	ENDDO
609	ENDDO
610	!
611	! ------------ U points -------------
612	igrd=2
613	icount=0
614	DO ir = 1, nn_rimwidth(ib_bdy)
615	! DO ii = jpisdt(iseg), jpisft(iseg) - 1
616	DO ii = jpisdt(iseg), jpisft(iseg)
617	icount = icount + 1
618	nbidta(icount, igrd, ib_bdy) = ii
619	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
620	nbrdta(icount, igrd, ib_bdy) = ir
621	ENDDO
622	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
623	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
624	ENDDO
625	!
626	! ------------ V points -------------
627	igrd=3
628	icount=0
629	DO ir = 1, nn_rimwidth(ib_bdy)
630	DO ii = jpisdt(iseg), jpisft(iseg)
631	icount = icount + 1
632	nbidta(icount, igrd, ib_bdy) = ii
633	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
634	nbrdta(icount, igrd, ib_bdy) = ir
635	ENDDO
636	ENDDO
637	ENDDO
638
639	! Deal with duplicated points
640	!-----------------------------
641	! We assign negative indices to duplicated points (to remove them from bdy points to be updated)
642	! if their distance to the bdy is greater than the other
643	! If their distance are the same, just keep only one to avoid updating a point twice
644	DO igrd = 1, jpbgrd
645	DO ib_bdy1 = 1, nb_bdy
646	DO ib_bdy2 = 1, nb_bdy
647	IF (ib_bdy1/=ib_bdy2) THEN
648	DO ib1 = 1, nblendta(igrd,ib_bdy1)
649	DO ib2 = 1, nblendta(igrd,ib_bdy2)
650	IF ((nbidta(ib1, igrd, ib_bdy1)==nbidta(ib2, igrd, ib_bdy2)).AND. &
651	& (nbjdta(ib1, igrd, ib_bdy1)==nbjdta(ib2, igrd, ib_bdy2))) THEN
652	! IF ((lwp).AND.(igrd==1)) WRITE(numout,*) ' found coincident point ji, jj:', &
653	! & nbidta(ib1, igrd, ib_bdy1), &
654	! & nbjdta(ib2, igrd, ib_bdy2)
655	! keep only points with the lowest distance to boundary:
656	IF (nbrdta(ib1, igrd, ib_bdy1)<nbrdta(ib2, igrd, ib_bdy2)) THEN
657	nbidta(ib2, igrd, ib_bdy2) =-ib_bdy2
658	nbjdta(ib2, igrd, ib_bdy2) =-ib_bdy2
659	ELSEIF (nbrdta(ib1, igrd, ib_bdy1)>nbrdta(ib2, igrd, ib_bdy2)) THEN
660	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
661	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
662	! Arbitrary choice if distances are the same:
663	ELSE
664	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
665	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
666	ENDIF
667	END IF
668	END DO
669	END DO
670	ENDIF
671	END DO
672	END DO
673	END DO
674
675	! Work out dimensions of boundary data on each processor
676	! ------------------------------------------------------
677
678	! Rather assume that boundary data indices are given on global domain
679	! TO BE DISCUSSED ?
680	! iw = mig(1) + 1 ! if monotasking and no zoom, iw=2
681	! ie = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
682	! is = mjg(1) + 1 ! if monotasking and no zoom, is=2
683	! in = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
684	iw = mig(1) - jpizoom + 2 ! if monotasking and no zoom, iw=2
685	ie = mig(1) + nlci - jpizoom - 1 ! if monotasking and no zoom, ie=jpim1
686	is = mjg(1) - jpjzoom + 2 ! if monotasking and no zoom, is=2
687	in = mjg(1) + nlcj - jpjzoom - 1 ! if monotasking and no zoom, in=jpjm1
688
689	ALLOCATE( nbondi_bdy(nb_bdy))
690	ALLOCATE( nbondj_bdy(nb_bdy))
691	nbondi_bdy(:)=2
692	nbondj_bdy(:)=2
693	ALLOCATE( nbondi_bdy_b(nb_bdy))
694	ALLOCATE( nbondj_bdy_b(nb_bdy))
695	nbondi_bdy_b(:)=2
696	nbondj_bdy_b(:)=2
697
698	! Work out dimensions of boundary data on each neighbour process
699	IF(nbondi .eq. 0) THEN
700	iw_b(1) = jpizoom + nimppt(nowe+1)
701	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
702	is_b(1) = jpjzoom + njmppt(nowe+1)
703	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
704
705	iw_b(2) = jpizoom + nimppt(noea+1)
706	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
707	is_b(2) = jpjzoom + njmppt(noea+1)
708	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
709	ELSEIF(nbondi .eq. 1) THEN
710	iw_b(1) = jpizoom + nimppt(nowe+1)
711	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
712	is_b(1) = jpjzoom + njmppt(nowe+1)
713	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
714	ELSEIF(nbondi .eq. -1) THEN
715	iw_b(2) = jpizoom + nimppt(noea+1)
716	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
717	is_b(2) = jpjzoom + njmppt(noea+1)
718	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
719	ENDIF
720
721	IF(nbondj .eq. 0) THEN
722	iw_b(3) = jpizoom + nimppt(noso+1)
723	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
724	is_b(3) = jpjzoom + njmppt(noso+1)
725	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
726
727	iw_b(4) = jpizoom + nimppt(nono+1)
728	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
729	is_b(4) = jpjzoom + njmppt(nono+1)
730	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
731	ELSEIF(nbondj .eq. 1) THEN
732	iw_b(3) = jpizoom + nimppt(noso+1)
733	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
734	is_b(3) = jpjzoom + njmppt(noso+1)
735	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
736	ELSEIF(nbondj .eq. -1) THEN
737	iw_b(4) = jpizoom + nimppt(nono+1)
738	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
739	is_b(4) = jpjzoom + njmppt(nono+1)
740	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
741	ENDIF
742
743	DO ib_bdy = 1, nb_bdy
744	DO igrd = 1, jpbgrd
745	icount = 0
746	icountr = 0
747	idx_bdy(ib_bdy)%nblen(igrd) = 0
748	idx_bdy(ib_bdy)%nblenrim(igrd) = 0
749	DO ib = 1, nblendta(igrd,ib_bdy)
750	! check that data is in correct order in file
751	ibm1 = MAX(1,ib-1)
752	IF(lwp) THEN ! Since all procs read global data only need to do this check on one proc...
753	IF( nbrdta(ib,igrd,ib_bdy) < nbrdta(ibm1,igrd,ib_bdy) ) THEN
754	CALL ctl_stop('bdy_init : ERROR : boundary data in file &
755	must be defined in order of distance from edge nbr.', &
756	'A utility for re-ordering boundary coordinates and data &
757	files exists in the TOOLS/OBC directory')
758	ENDIF
759	ENDIF
760	! check if point is in local domain
761	IF( nbidta(ib,igrd,ib_bdy) >= iw .AND. nbidta(ib,igrd,ib_bdy) <= ie .AND. &
762	& nbjdta(ib,igrd,ib_bdy) >= is .AND. nbjdta(ib,igrd,ib_bdy) <= in .AND. &
763	& nbrdta(ib,igrd,ib_bdy) <= nn_rimwidth(ib_bdy) ) THEN
764	!
765	icount = icount + 1
766	!
767	IF( nbrdta(ib,igrd,ib_bdy) == 1 ) icountr = icountr+1
768	ENDIF
769	ENDDO
770	idx_bdy(ib_bdy)%nblenrim(igrd) = icountr !: length of rim boundary data on each proc
771	idx_bdy(ib_bdy)%nblen (igrd) = icount !: length of boundary data on each proc
772	ENDDO ! igrd
773
774	! Allocate index arrays for this boundary set
775	!--------------------------------------------
776
777	ilen1 = MAXVAL(idx_bdy(ib_bdy)%nblen(1:jpbgrd))
778	ilen1 = MAX(1,ilen1)
779	ALLOCATE( idx_bdy(ib_bdy)%nbi(ilen1,jpbgrd) )
780	ALLOCATE( idx_bdy(ib_bdy)%nbj(ilen1,jpbgrd) )
781	ALLOCATE( idx_bdy(ib_bdy)%nbr(ilen1,jpbgrd) )
782	ALLOCATE( idx_bdy(ib_bdy)%nbd(ilen1,jpbgrd) )
783	ALLOCATE( idx_bdy(ib_bdy)%nbmap(ilen1,jpbgrd) )
784	ALLOCATE( idx_bdy(ib_bdy)%nbw(ilen1,jpbgrd) )
785	ALLOCATE( idx_bdy(ib_bdy)%flagu(ilen1) )
786	ALLOCATE( idx_bdy(ib_bdy)%flagv(ilen1) )
787
788	! Dispatch mapping indices and discrete distances on each processor
789	! -----------------------------------------------------------------
790
791	com_east = 0
792	com_west = 0
793	com_south = 0
794	com_north = 0
795
796	com_east_b = 0
797	com_west_b = 0
798	com_south_b = 0
799	com_north_b = 0
800	DO igrd = 1, jpbgrd
801	icount = 0
802	! Loop on rimwidth to ensure outermost points come first in the local arrays.
803	DO ir=1, nn_rimwidth(ib_bdy)
804	DO ib = 1, nblendta(igrd,ib_bdy)
805	! check if point is in local domain and equals ir
806	IF( nbidta(ib,igrd,ib_bdy) >= iw .AND. nbidta(ib,igrd,ib_bdy) <= ie .AND. &
807	& nbjdta(ib,igrd,ib_bdy) >= is .AND. nbjdta(ib,igrd,ib_bdy) <= in .AND. &
808	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
809	!
810	icount = icount + 1
811
812	! Rather assume that boundary data indices are given on global domain
813	! TO BE DISCUSSED ?
814	! idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
815	! idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
816	idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+jpizoom
817	idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+jpjzoom
818	! check if point has to be sent
819	ii = idx_bdy(ib_bdy)%nbi(icount,igrd)
820	ij = idx_bdy(ib_bdy)%nbj(icount,igrd)
821	if((com_east .ne. 1) .and. (ii .eq. (nlci-1)) .and. (nbondi .le. 0)) then
822	com_east = 1
823	elseif((com_west .ne. 1) .and. (ii .eq. 2) .and. (nbondi .ge. 0) .and. (nbondi .ne. 2)) then
824	com_west = 1
825	endif
826	if((com_south .ne. 1) .and. (ij .eq. 2) .and. (nbondj .ge. 0) .and. (nbondj .ne. 2)) then
827	com_south = 1
828	elseif((com_north .ne. 1) .and. (ij .eq. (nlcj-1)) .and. (nbondj .le. 0)) then
829	com_north = 1
830	endif
831	idx_bdy(ib_bdy)%nbr(icount,igrd) = nbrdta(ib,igrd,ib_bdy)
832	idx_bdy(ib_bdy)%nbmap(icount,igrd) = ib
833	ENDIF
834	! check if point has to be received from a neighbour
835	IF(nbondi .eq. 0) THEN
836	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
837	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
838	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
839	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
840	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
841	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
842	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
843	com_south = 1
844	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
845	com_north = 1
846	endif
847	com_west_b = 1
848	endif
849	ENDIF
850	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
851	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
852	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
853	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
854	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
855	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
856	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
857	com_south = 1
858	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
859	com_north = 1
860	endif
861	com_east_b = 1
862	endif
863	ENDIF
864	ELSEIF(nbondi .eq. 1) THEN
865	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
866	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
867	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
868	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
869	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
870	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
871	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
872	com_south = 1
873	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
874	com_north = 1
875	endif
876	com_west_b = 1
877	endif
878	ENDIF
879	ELSEIF(nbondi .eq. -1) THEN
880	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
881	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
882	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
883	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
884	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
885	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
886	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
887	com_south = 1
888	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
889	com_north = 1
890	endif
891	com_east_b = 1
892	endif
893	ENDIF
894	ENDIF
895	IF(nbondj .eq. 0) THEN
896	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
897	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
898	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
899	com_north_b = 1
900	ENDIF
901	IF(com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 &
902	&.OR. nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
903	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
904	com_south_b = 1
905	ENDIF
906	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
907	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
908	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
909	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
910	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
911	com_south_b = 1
912	endif
913	ENDIF
914	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
915	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
916	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
917	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
918	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
919	com_north_b = 1
920	endif
921	ENDIF
922	ELSEIF(nbondj .eq. 1) THEN
923	IF( com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 .OR. &
924	& nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
925	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
926	com_south_b = 1
927	ENDIF
928	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
929	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
930	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
931	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
932	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
933	com_south_b = 1
934	endif
935	ENDIF
936	ELSEIF(nbondj .eq. -1) THEN
937	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
938	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
939	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
940	com_north_b = 1
941	ENDIF
942	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
943	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
944	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
945	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
946	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
947	com_north_b = 1
948	endif
949	ENDIF
950	ENDIF
951	ENDDO
952	ENDDO
953	ENDDO
954	! definition of the i- and j- direction local boundaries arrays
955	! used for sending the boudaries
956	IF((com_east .eq. 1) .and. (com_west .eq. 1)) THEN
957	nbondi_bdy(ib_bdy) = 0
958	ELSEIF ((com_east .eq. 1) .and. (com_west .eq. 0)) THEN
959	nbondi_bdy(ib_bdy) = -1
960	ELSEIF ((com_east .eq. 0) .and. (com_west .eq. 1)) THEN
961	nbondi_bdy(ib_bdy) = 1
962	ENDIF
963
964	IF((com_north .eq. 1) .and. (com_south .eq. 1)) THEN
965	nbondj_bdy(ib_bdy) = 0
966	ELSEIF ((com_north .eq. 1) .and. (com_south .eq. 0)) THEN
967	nbondj_bdy(ib_bdy) = -1
968	ELSEIF ((com_north .eq. 0) .and. (com_south .eq. 1)) THEN
969	nbondj_bdy(ib_bdy) = 1
970	ENDIF
971
972	! definition of the i- and j- direction local boundaries arrays
973	! used for receiving the boudaries
974	IF((com_east_b .eq. 1) .and. (com_west_b .eq. 1)) THEN
975	nbondi_bdy_b(ib_bdy) = 0
976	ELSEIF ((com_east_b .eq. 1) .and. (com_west_b .eq. 0)) THEN
977	nbondi_bdy_b(ib_bdy) = -1
978	ELSEIF ((com_east_b .eq. 0) .and. (com_west_b .eq. 1)) THEN
979	nbondi_bdy_b(ib_bdy) = 1
980	ENDIF
981
982	IF((com_north_b .eq. 1) .and. (com_south_b .eq. 1)) THEN
983	nbondj_bdy_b(ib_bdy) = 0
984	ELSEIF ((com_north_b .eq. 1) .and. (com_south_b .eq. 0)) THEN
985	nbondj_bdy_b(ib_bdy) = -1
986	ELSEIF ((com_north_b .eq. 0) .and. (com_south_b .eq. 1)) THEN
987	nbondj_bdy_b(ib_bdy) = 1
988	ENDIF
989
990	! Compute rim weights for FRS scheme
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)%nbw(ib,igrd) = 1.- TANH( FLOAT( nbr - 1 ) *0.5 ) ! tanh formulation
996	! idx_bdy(ib_bdy)%nbw(ib,igrd) = (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))**2. ! quadratic
997	! idx_bdy(ib_bdy)%nbw(ib,igrd) = FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)) ! linear
998	END DO
999	END DO
1000
1001	! Compute damping coefficients
1002	! ----------------------------
1003	DO igrd = 1, jpbgrd
1004	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1005	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1006	idx_bdy(ib_bdy)%nbd(ib,igrd) = 1. / ( rn_time_dmp(ib_bdy) * rday ) &
1007	& (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))*2. ! quadratic
1008	END DO
1009	END DO
1010
1011	ENDDO
1012
1013	! ------------------------------------------------------
1014	! Initialise masks and find normal/tangential directions
1015	! ------------------------------------------------------
1016
1017	! Read global 2D mask at T-points: bdytmask
1018	! -----------------------------------------
1019	! bdytmask = 1 on the computational domain AND on open boundaries
1020	! = 0 elsewhere
1021	bdytmask(:,:) = 1.e0
1022	bdyumask(:,:) = 1.e0
1023	bdyvmask(:,:) = 1.e0
1024
1025	IF( ln_mask_file ) THEN
1026	CALL iom_open( cn_mask_file, inum )
1027	CALL iom_get ( inum, jpdom_data, 'bdy_msk', bdytmask(:,:) )
1028	CALL iom_close( inum )
1029
1030	! Derive mask on U and V grid from mask on T grid
1031	bdyumask(:,:) = 0.e0
1032	bdyvmask(:,:) = 0.e0
1033	DO ij=1, jpjm1
1034	DO ii=1, jpim1
1035	bdyumask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii+1, ij )
1036	bdyvmask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii ,ij+1)
1037	END DO
1038	END DO
1039	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. ) ! Lateral boundary cond.
1040
1041
1042	! Mask corrections
1043	! ----------------
1044	DO ik = 1, jpkm1
1045	DO ij = 1, jpj
1046	DO ii = 1, jpi
1047	tmask(ii,ij,ik) = tmask(ii,ij,ik) * bdytmask(ii,ij)
1048	umask(ii,ij,ik) = umask(ii,ij,ik) * bdyumask(ii,ij)
1049	vmask(ii,ij,ik) = vmask(ii,ij,ik) * bdyvmask(ii,ij)
1050	bmask(ii,ij) = bmask(ii,ij) * bdytmask(ii,ij)
1051	END DO
1052	END DO
1053	END DO
1054
1055	DO ik = 1, jpkm1
1056	DO ij = 2, jpjm1
1057	DO ii = 2, jpim1
1058	fmask(ii,ij,ik) = fmask(ii,ij,ik) * bdytmask(ii,ij ) * bdytmask(ii+1,ij ) &
1059	& * bdytmask(ii,ij+1) * bdytmask(ii+1,ij+1)
1060	END DO
1061	END DO
1062	END DO
1063
1064	tmask_i (:,:) = tmask(:,:,1) * tmask_i(:,:)
1065
1066	ENDIF ! ln_mask_file=.TRUE.
1067
1068	bdytmask(:,:) = tmask(:,:,1)
1069
1070	! bdy masks and bmask are now set to zero on boundary points:
1071	igrd = 1 ! In the free surface case, bmask is at T-points
1072	DO ib_bdy = 1, nb_bdy
1073	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1074	bmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1075	ENDDO
1076	ENDDO
1077	!
1078	igrd = 1
1079	DO ib_bdy = 1, nb_bdy
1080	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1081	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1082	ENDDO
1083	ENDDO
1084	!
1085	igrd = 2
1086	DO ib_bdy = 1, nb_bdy
1087	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1088	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1089	ENDDO
1090	ENDDO
1091	!
1092	igrd = 3
1093	DO ib_bdy = 1, nb_bdy
1094	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1095	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1096	ENDDO
1097	ENDDO
1098
1099	! Lateral boundary conditions
1100	CALL lbc_lnk( fmask , 'F', 1. ) ; CALL lbc_lnk( bdytmask(:,:), 'T', 1. )
1101	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. )
1102
1103	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1104
1105	idx_bdy(ib_bdy)%flagu(:) = 0.e0
1106	idx_bdy(ib_bdy)%flagv(:) = 0.e0
1107	icount = 0
1108
1109	!flagu = -1 : u component is normal to the dynamical boundary but its direction is outward
1110	!flagu = 0 : u is tangential
1111	!flagu = 1 : u is normal to the boundary and is direction is inward
1112
1113	igrd = 2 ! u-component
1114	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1115	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1116	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1117	zefl = bdytmask(nbi ,nbj)
1118	zwfl = bdytmask(nbi+1,nbj)
1119	IF( zefl + zwfl == 2 ) THEN
1120	icount = icount + 1
1121	ELSE
1122	idx_bdy(ib_bdy)%flagu(ib)=-zefl+zwfl
1123	ENDIF
1124	END DO
1125
1126	!flagv = -1 : u component is normal to the dynamical boundary but its direction is outward
1127	!flagv = 0 : u is tangential
1128	!flagv = 1 : u is normal to the boundary and is direction is inward
1129
1130	igrd = 3 ! v-component
1131	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1132	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1133	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1134	znfl = bdytmask(nbi,nbj )
1135	zsfl = bdytmask(nbi,nbj+1)
1136	IF( znfl + zsfl == 2 ) THEN
1137	icount = icount + 1
1138	ELSE
1139	idx_bdy(ib_bdy)%flagv(ib) = -znfl + zsfl
1140	END IF
1141	END DO
1142
1143	IF( icount /= 0 ) THEN
1144	IF(lwp) WRITE(numout,*)
1145	IF(lwp) WRITE(numout,*) ' E R R O R : Some data velocity points,', &
1146	' are not boundary points. Check nbi, nbj, indices for boundary set ',ib_bdy
1147	IF(lwp) WRITE(numout,*) ' ========== '
1148	IF(lwp) WRITE(numout,*)
1149	nstop = nstop + 1
1150	ENDIF
1151
1152	ENDDO
1153
1154	! Compute total lateral surface for volume correction:
1155	! ----------------------------------------------------
1156	! JC: this must be done at each time step with key_vvl
1157	bdysurftot = 0.e0
1158	IF( ln_vol ) THEN
1159	igrd = 2 ! Lateral surface at U-points
1160	DO ib_bdy = 1, nb_bdy
1161	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1162	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1163	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1164	flagu => idx_bdy(ib_bdy)%flagu(ib)
1165	bdysurftot = bdysurftot + hu (nbi , nbj) &
1166	& * e2u (nbi , nbj) * ABS( flagu ) &
1167	& * tmask_i(nbi , nbj) &
1168	& * tmask_i(nbi+1, nbj)
1169	ENDDO
1170	ENDDO
1171
1172	igrd=3 ! Add lateral surface at V-points
1173	DO ib_bdy = 1, nb_bdy
1174	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1175	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1176	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1177	flagv => idx_bdy(ib_bdy)%flagv(ib)
1178	bdysurftot = bdysurftot + hv (nbi, nbj ) &
1179	& * e1v (nbi, nbj ) * ABS( flagv ) &
1180	& * tmask_i(nbi, nbj ) &
1181	& * tmask_i(nbi, nbj+1)
1182	ENDDO
1183	ENDDO
1184	!
1185	IF( lk_mpp ) CALL mpp_sum( bdysurftot ) ! sum over the global domain
1186	END IF
1187	!
1188	! Tidy up
1189	!--------
1190	IF (nb_bdy>0) THEN
1191	DEALLOCATE(nbidta, nbjdta, nbrdta)
1192	ENDIF
1193
1194	IF( nn_timing == 1 ) CALL timing_stop('bdy_init')
1195
1196	END SUBROUTINE bdy_init
1197
1198	SUBROUTINE bdy_ctl_seg
1199	!!----------------------------------------------------------------------
1200	!! * ROUTINE bdy_ctl_seg *
1201	!!
1202	!! ** Purpose : Check straight open boundary segments location
1203	!!
1204	!! ** Method : - Look for open boundary corners
1205	!! - Check that segments start or end on land
1206	!!----------------------------------------------------------------------
1207	INTEGER :: ib, ib1, ib2, ji ,jj, itest
1208	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1209	REAL(wp), DIMENSION(2) :: ztestmask
1210	!!----------------------------------------------------------------------
1211	!
1212	IF (lwp) WRITE(numout,*) ' '
1213	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1214	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1215	!
1216	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1217	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1218	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1219	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1220	! 1. Check bounds
1221	!----------------
1222	DO ib = 1, nbdysegn
1223	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1224	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1225	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1226	IF (jpindt(ib).ge.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1227	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1228	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1229	END DO
1230	!
1231	DO ib = 1, nbdysegs
1232	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1233	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1234	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1235	IF (jpisdt(ib).ge.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1236	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1237	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1238	END DO
1239	!
1240	DO ib = 1, nbdysege
1241	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1242	IF ((jpieob(ib).ge.jpiglo-1).or.&
1243	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1244	IF (jpjedt(ib).ge.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1245	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1246	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1247	END DO
1248	!
1249	DO ib = 1, nbdysegw
1250	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1251	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1252	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1253	IF (jpjwdt(ib).ge.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1254	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1255	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1256	ENDDO
1257	!
1258	!
1259	! 2. Look for segment crossings
1260	!------------------------------
1261	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1262	!
1263	itest = 0 ! corner number
1264	!
1265	! flag to detect if start or end of open boundary belongs to a corner
1266	! if not (=0), it must be on land.
1267	! if a corner is detected, save bdy package number for further tests
1268	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1269	! South/West crossings
1270	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1271	DO ib1 = 1, nbdysegw
1272	DO ib2 = 1, nbdysegs
1273	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1274	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1275	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1276	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1277	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1278	! We have a possible South-West corner
1279	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1280	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1281	icornw(ib1,1) = npckgs(ib2)
1282	icorns(ib2,1) = npckgw(ib1)
1283	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1284	IF(lwp) WRITE(numout,*)
1285	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1286	& jpisft(ib2), jpjwft(ib1)
1287	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1288	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1289	& ' and South segment: ',npckgs(ib2)
1290	IF(lwp) WRITE(numout,*)
1291	nstop = nstop + 1
1292	ELSE
1293	IF(lwp) WRITE(numout,*)
1294	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and West Open boundary indices'
1295	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1296	& ' and South segment: ',npckgs(ib2)
1297	IF(lwp) WRITE(numout,*)
1298	nstop = nstop+1
1299	END IF
1300	END IF
1301	END DO
1302	END DO
1303	END IF
1304	!
1305	! South/East crossings
1306	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1307	DO ib1 = 1, nbdysege
1308	DO ib2 = 1, nbdysegs
1309	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1310	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1311	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1312	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1313	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1314	! We have a possible South-East corner
1315	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1316	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1317	icorne(ib1,1) = npckgs(ib2)
1318	icorns(ib2,2) = npckge(ib1)
1319	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1320	IF(lwp) WRITE(numout,*)
1321	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1322	& jpisdt(ib2), jpjeft(ib1)
1323	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1324	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1325	& ' and South segment: ',npckgs(ib2)
1326	IF(lwp) WRITE(numout,*)
1327	nstop = nstop + 1
1328	ELSE
1329	IF(lwp) WRITE(numout,*)
1330	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and East Open boundary indices'
1331	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1332	& ' and South segment: ',npckgs(ib2)
1333	IF(lwp) WRITE(numout,*)
1334	nstop = nstop + 1
1335	END IF
1336	END IF
1337	END DO
1338	END DO
1339	END IF
1340	!
1341	! North/West crossings
1342	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1343	DO ib1 = 1, nbdysegw
1344	DO ib2 = 1, nbdysegn
1345	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1346	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1347	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1348	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1349	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1350	! We have a possible North-West corner
1351	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1352	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1353	icornw(ib1,2) = npckgn(ib2)
1354	icornn(ib2,1) = npckgw(ib1)
1355	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1356	IF(lwp) WRITE(numout,*)
1357	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1358	& jpinft(ib2), jpjwdt(ib1)
1359	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1360	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1361	& ' and North segment: ',npckgn(ib2)
1362	IF(lwp) WRITE(numout,*)
1363	nstop = nstop + 1
1364	ELSE
1365	IF(lwp) WRITE(numout,*)
1366	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and West Open boundary indices'
1367	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1368	& ' and North segment: ',npckgn(ib2)
1369	IF(lwp) WRITE(numout,*)
1370	nstop = nstop + 1
1371	END IF
1372	END IF
1373	END DO
1374	END DO
1375	END IF
1376	!
1377	! North/East crossings
1378	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1379	DO ib1 = 1, nbdysege
1380	DO ib2 = 1, nbdysegn
1381	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1382	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1383	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1384	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1385	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1386	! We have a possible North-East corner
1387	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1388	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1389	icorne(ib1,2) = npckgn(ib2)
1390	icornn(ib2,2) = npckge(ib1)
1391	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1392	IF(lwp) WRITE(numout,*)
1393	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1394	& jpindt(ib2), jpjedt(ib1)
1395	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1396	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1397	& ' and North segment: ',npckgn(ib2)
1398	IF(lwp) WRITE(numout,*)
1399	nstop = nstop + 1
1400	ELSE
1401	IF(lwp) WRITE(numout,*)
1402	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and East Open boundary indices'
1403	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1404	& ' and North segment: ',npckgn(ib2)
1405	IF(lwp) WRITE(numout,*)
1406	nstop = nstop + 1
1407	END IF
1408	END IF
1409	END DO
1410	END DO
1411	END IF
1412	!
1413	! 3. Check if segment extremities are on land
1414	!--------------------------------------------
1415	!
1416	! West segments
1417	DO ib = 1, nbdysegw
1418	! get mask at boundary extremities:
1419	ztestmask(1:2)=0.
1420	DO ji = 1, jpi
1421	DO jj = 1, jpj
1422	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1423	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1424	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1425	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1426	END DO
1427	END DO
1428	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1429
1430	IF (ztestmask(1)==1) THEN
1431	IF (icornw(ib,1)==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 start 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 South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1440	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1441	itest=itest+1
1442	ENDIF
1443	ENDIF
1444	IF (ztestmask(2)==1) THEN
1445	IF (icornw(ib,2)==0) THEN
1446	IF(lwp) WRITE(numout,*)
1447	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1448	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1449	IF(lwp) WRITE(numout,*)
1450	nstop = nstop + 1
1451	ELSE
1452	! This is a corner
1453	WRITE(numout,*) 'Found a North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1454	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1455	itest=itest+1
1456	ENDIF
1457	ENDIF
1458	END DO
1459	!
1460	! East segments
1461	DO ib = 1, nbdysege
1462	! get mask at boundary extremities:
1463	ztestmask(1:2)=0.
1464	DO ji = 1, jpi
1465	DO jj = 1, jpj
1466	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1467	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1468	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1469	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1470	END DO
1471	END DO
1472	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1473
1474	IF (ztestmask(1)==1) THEN
1475	IF (icorne(ib,1)==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 start 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 South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1484	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1485	itest=itest+1
1486	ENDIF
1487	ENDIF
1488	IF (ztestmask(2)==1) THEN
1489	IF (icorne(ib,2)==0) THEN
1490	IF(lwp) WRITE(numout,*)
1491	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1492	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1493	IF(lwp) WRITE(numout,*)
1494	nstop = nstop + 1
1495	ELSE
1496	! This is a corner
1497	WRITE(numout,*) 'Found a North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1498	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1499	itest=itest+1
1500	ENDIF
1501	ENDIF
1502	END DO
1503	!
1504	! South segments
1505	DO ib = 1, nbdysegs
1506	! get mask at boundary extremities:
1507	ztestmask(1:2)=0.
1508	DO ji = 1, jpi
1509	DO jj = 1, jpj
1510	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1511	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1512	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1513	& ((ji + nimpp - 1) == jpisft(ib))) ztestmask(2)=tmask(ji,jj,1)
1514	END DO
1515	END DO
1516	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1517
1518	IF ((ztestmask(1)==1).AND.(icorns(ib,1)==0)) THEN
1519	IF(lwp) WRITE(numout,*)
1520	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1521	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1522	IF(lwp) WRITE(numout,*)
1523	nstop = nstop + 1
1524	ENDIF
1525	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1526	IF(lwp) WRITE(numout,*)
1527	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1528	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1529	IF(lwp) WRITE(numout,*)
1530	nstop = nstop + 1
1531	ENDIF
1532	END DO
1533	!
1534	! North segments
1535	DO ib = 1, nbdysegn
1536	! get mask at boundary extremities:
1537	ztestmask(1:2)=0.
1538	DO ji = 1, jpi
1539	DO jj = 1, jpj
1540	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1541	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1542	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1543	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1544	END DO
1545	END DO
1546	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1547
1548	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1549	IF(lwp) WRITE(numout,*)
1550	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1551	IF(lwp) WRITE(numout,*) ' ========== does not start on land'
1552	IF(lwp) WRITE(numout,*)
1553	nstop = nstop + 1
1554	ENDIF
1555	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1556	IF(lwp) WRITE(numout,*)
1557	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1558	IF(lwp) WRITE(numout,*) ' ========== does not end on land'
1559	IF(lwp) WRITE(numout,*)
1560	nstop = nstop + 1
1561	ENDIF
1562	END DO
1563	!
1564	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1565	!
1566	! Other tests TBD:
1567	! segments completly on land
1568	! optimized open boundary array length according to landmask
1569	! Nudging layers that overlap with interior domain
1570	!
1571	END SUBROUTINE bdy_ctl_seg
1572
1573	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1574	!!----------------------------------------------------------------------
1575	!! * ROUTINE bdy_ctl_corn *
1576	!!
1577	!! ** Purpose : Check numerical schemes consistency between
1578	!! segments having a common corner
1579	!!
1580	!! ** Method :
1581	!!----------------------------------------------------------------------
1582	INTEGER, INTENT(in) :: ib1, ib2
1583	INTEGER :: itest
1584	!!----------------------------------------------------------------------
1585	itest = 0
1586
1587	IF (nn_dyn2d(ib1)/=nn_dyn2d(ib2)) itest = itest + 1
1588	IF (nn_dyn3d(ib1)/=nn_dyn3d(ib2)) itest = itest + 1
1589	IF (nn_tra(ib1)/=nn_tra(ib2)) itest = itest + 1
1590	!
1591	IF (nn_dyn2d_dta(ib1)/=nn_dyn2d_dta(ib2)) itest = itest + 1
1592	IF (nn_dyn3d_dta(ib1)/=nn_dyn3d_dta(ib2)) itest = itest + 1
1593	IF (nn_tra_dta(ib1)/=nn_tra_dta(ib2)) itest = itest + 1
1594	!
1595	IF (nn_rimwidth(ib1)/=nn_rimwidth(ib2)) itest = itest + 1
1596	!
1597	IF ( itest>0 ) THEN
1598	IF(lwp) WRITE(numout,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1599	IF(lwp) WRITE(numout,*) ' ========== have different open bdy schemes'
1600	IF(lwp) WRITE(numout,*)
1601	nstop = nstop + 1
1602	ENDIF
1603	!
1604	END SUBROUTINE bdy_ctl_corn
1605
1606	#else
1607	!!---------------------------------------------------------------------------------
1608	!! Dummy module NO open boundaries
1609	!!---------------------------------------------------------------------------------
1610	CONTAINS
1611	SUBROUTINE bdy_init ! Dummy routine
1612	END SUBROUTINE bdy_init
1613	#endif
1614
1615	!!=================================================================================
1616	END MODULE bdyini

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