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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 @ 4193

Last change on this file since 4193 was 4193, checked in by cbricaud, 11 years ago
Merge branch with revision 4119
Property svn:keywords set to `Id`
File size: 75.2 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	IF( .not. ln_mask_file ) THEN
1070	! If .not. ln_mask_file then we need to derive mask on U and V grid
1071	! from mask on T grid here.
1072	bdyumask(:,:) = 0.e0
1073	bdyvmask(:,:) = 0.e0
1074	DO ij=1, jpjm1
1075	DO ii=1, jpim1
1076	bdyumask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii+1, ij )
1077	bdyvmask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii ,ij+1)
1078	END DO
1079	END DO
1080	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. ) ! Lateral boundary cond.
1081	ENDIF
1082
1083	! bdy masks and bmask are now set to zero on boundary points:
1084	igrd = 1 ! In the free surface case, bmask is at T-points
1085	DO ib_bdy = 1, nb_bdy
1086	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1087	bmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1088	ENDDO
1089	ENDDO
1090	!
1091	igrd = 1
1092	DO ib_bdy = 1, nb_bdy
1093	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1094	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1095	ENDDO
1096	ENDDO
1097	!
1098	igrd = 2
1099	DO ib_bdy = 1, nb_bdy
1100	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1101	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1102	ENDDO
1103	ENDDO
1104	!
1105	igrd = 3
1106	DO ib_bdy = 1, nb_bdy
1107	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1108	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1109	ENDDO
1110	ENDDO
1111
1112	! Lateral boundary conditions
1113	CALL lbc_lnk( fmask , 'F', 1. ) ; CALL lbc_lnk( bdytmask(:,:), 'T', 1. )
1114	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. )
1115
1116	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1117
1118	idx_bdy(ib_bdy)%flagu(:) = 0.e0
1119	idx_bdy(ib_bdy)%flagv(:) = 0.e0
1120	icount = 0
1121
1122	!flagu = -1 : u component is normal to the dynamical boundary but its direction is outward
1123	!flagu = 0 : u is tangential
1124	!flagu = 1 : u is normal to the boundary and is direction is inward
1125
1126	igrd = 2 ! u-component
1127	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1128	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1129	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1130	zefl = bdytmask(nbi ,nbj)
1131	zwfl = bdytmask(nbi+1,nbj)
1132	IF( zefl + zwfl == 2 ) THEN
1133	icount = icount + 1
1134	ELSE
1135	idx_bdy(ib_bdy)%flagu(ib)=-zefl+zwfl
1136	ENDIF
1137	END DO
1138
1139	!flagv = -1 : u component is normal to the dynamical boundary but its direction is outward
1140	!flagv = 0 : u is tangential
1141	!flagv = 1 : u is normal to the boundary and is direction is inward
1142
1143	igrd = 3 ! v-component
1144	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1145	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1146	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1147	znfl = bdytmask(nbi,nbj )
1148	zsfl = bdytmask(nbi,nbj+1)
1149	IF( znfl + zsfl == 2 ) THEN
1150	icount = icount + 1
1151	ELSE
1152	idx_bdy(ib_bdy)%flagv(ib) = -znfl + zsfl
1153	END IF
1154	END DO
1155
1156	IF( icount /= 0 ) THEN
1157	IF(lwp) WRITE(numout,*)
1158	IF(lwp) WRITE(numout,*) ' E R R O R : Some data velocity points,', &
1159	' are not boundary points. Check nbi, nbj, indices for boundary set ',ib_bdy
1160	IF(lwp) WRITE(numout,*) ' ========== '
1161	IF(lwp) WRITE(numout,*)
1162	nstop = nstop + 1
1163	ENDIF
1164
1165	ENDDO
1166
1167	! Compute total lateral surface for volume correction:
1168	! ----------------------------------------------------
1169	! JC: this must be done at each time step with key_vvl
1170	bdysurftot = 0.e0
1171	IF( ln_vol ) THEN
1172	igrd = 2 ! Lateral surface at U-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	flagu => idx_bdy(ib_bdy)%flagu(ib)
1178	bdysurftot = bdysurftot + hu (nbi , nbj) &
1179	& * e2u (nbi , nbj) * ABS( flagu ) &
1180	& * tmask_i(nbi , nbj) &
1181	& * tmask_i(nbi+1, nbj)
1182	ENDDO
1183	ENDDO
1184
1185	igrd=3 ! Add lateral surface at V-points
1186	DO ib_bdy = 1, nb_bdy
1187	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1188	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1189	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1190	flagv => idx_bdy(ib_bdy)%flagv(ib)
1191	bdysurftot = bdysurftot + hv (nbi, nbj ) &
1192	& * e1v (nbi, nbj ) * ABS( flagv ) &
1193	& * tmask_i(nbi, nbj ) &
1194	& * tmask_i(nbi, nbj+1)
1195	ENDDO
1196	ENDDO
1197	!
1198	IF( lk_mpp ) CALL mpp_sum( bdysurftot ) ! sum over the global domain
1199	END IF
1200	!
1201	! Tidy up
1202	!--------
1203	IF (nb_bdy>0) THEN
1204	DEALLOCATE(nbidta, nbjdta, nbrdta)
1205	ENDIF
1206
1207	IF( nn_timing == 1 ) CALL timing_stop('bdy_init')
1208
1209	END SUBROUTINE bdy_init
1210
1211	SUBROUTINE bdy_ctl_seg
1212	!!----------------------------------------------------------------------
1213	!! * ROUTINE bdy_ctl_seg *
1214	!!
1215	!! ** Purpose : Check straight open boundary segments location
1216	!!
1217	!! ** Method : - Look for open boundary corners
1218	!! - Check that segments start or end on land
1219	!!----------------------------------------------------------------------
1220	INTEGER :: ib, ib1, ib2, ji ,jj, itest
1221	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1222	REAL(wp), DIMENSION(2) :: ztestmask
1223	!!----------------------------------------------------------------------
1224	!
1225	IF (lwp) WRITE(numout,*) ' '
1226	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1227	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1228	!
1229	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1230	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1231	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1232	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1233	! 1. Check bounds
1234	!----------------
1235	DO ib = 1, nbdysegn
1236	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1237	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1238	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1239	IF (jpindt(ib).ge.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1240	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1241	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1242	END DO
1243	!
1244	DO ib = 1, nbdysegs
1245	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1246	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1247	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1248	IF (jpisdt(ib).ge.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1249	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1250	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1251	END DO
1252	!
1253	DO ib = 1, nbdysege
1254	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1255	IF ((jpieob(ib).ge.jpiglo-1).or.&
1256	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1257	IF (jpjedt(ib).ge.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1258	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1259	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1260	END DO
1261	!
1262	DO ib = 1, nbdysegw
1263	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1264	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1265	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1266	IF (jpjwdt(ib).ge.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1267	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1268	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1269	ENDDO
1270	!
1271	!
1272	! 2. Look for segment crossings
1273	!------------------------------
1274	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1275	!
1276	itest = 0 ! corner number
1277	!
1278	! flag to detect if start or end of open boundary belongs to a corner
1279	! if not (=0), it must be on land.
1280	! if a corner is detected, save bdy package number for further tests
1281	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1282	! South/West crossings
1283	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1284	DO ib1 = 1, nbdysegw
1285	DO ib2 = 1, nbdysegs
1286	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1287	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1288	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1289	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1290	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1291	! We have a possible South-West corner
1292	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1293	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1294	icornw(ib1,1) = npckgs(ib2)
1295	icorns(ib2,1) = npckgw(ib1)
1296	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1297	IF(lwp) WRITE(numout,*)
1298	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1299	& jpisft(ib2), jpjwft(ib1)
1300	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1301	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1302	& ' and South segment: ',npckgs(ib2)
1303	IF(lwp) WRITE(numout,*)
1304	nstop = nstop + 1
1305	ELSE
1306	IF(lwp) WRITE(numout,*)
1307	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and West Open boundary indices'
1308	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1309	& ' and South segment: ',npckgs(ib2)
1310	IF(lwp) WRITE(numout,*)
1311	nstop = nstop+1
1312	END IF
1313	END IF
1314	END DO
1315	END DO
1316	END IF
1317	!
1318	! South/East crossings
1319	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1320	DO ib1 = 1, nbdysege
1321	DO ib2 = 1, nbdysegs
1322	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1323	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1324	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1325	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1326	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1327	! We have a possible South-East corner
1328	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1329	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1330	icorne(ib1,1) = npckgs(ib2)
1331	icorns(ib2,2) = npckge(ib1)
1332	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1333	IF(lwp) WRITE(numout,*)
1334	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1335	& jpisdt(ib2), jpjeft(ib1)
1336	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1337	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1338	& ' and South segment: ',npckgs(ib2)
1339	IF(lwp) WRITE(numout,*)
1340	nstop = nstop + 1
1341	ELSE
1342	IF(lwp) WRITE(numout,*)
1343	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and East Open boundary indices'
1344	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1345	& ' and South segment: ',npckgs(ib2)
1346	IF(lwp) WRITE(numout,*)
1347	nstop = nstop + 1
1348	END IF
1349	END IF
1350	END DO
1351	END DO
1352	END IF
1353	!
1354	! North/West crossings
1355	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1356	DO ib1 = 1, nbdysegw
1357	DO ib2 = 1, nbdysegn
1358	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1359	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1360	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1361	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1362	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1363	! We have a possible North-West corner
1364	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1365	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1366	icornw(ib1,2) = npckgn(ib2)
1367	icornn(ib2,1) = npckgw(ib1)
1368	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1369	IF(lwp) WRITE(numout,*)
1370	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1371	& jpinft(ib2), jpjwdt(ib1)
1372	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1373	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1374	& ' and North segment: ',npckgn(ib2)
1375	IF(lwp) WRITE(numout,*)
1376	nstop = nstop + 1
1377	ELSE
1378	IF(lwp) WRITE(numout,*)
1379	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and West Open boundary indices'
1380	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1381	& ' and North segment: ',npckgn(ib2)
1382	IF(lwp) WRITE(numout,*)
1383	nstop = nstop + 1
1384	END IF
1385	END IF
1386	END DO
1387	END DO
1388	END IF
1389	!
1390	! North/East crossings
1391	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1392	DO ib1 = 1, nbdysege
1393	DO ib2 = 1, nbdysegn
1394	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1395	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1396	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1397	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1398	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1399	! We have a possible North-East corner
1400	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1401	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1402	icorne(ib1,2) = npckgn(ib2)
1403	icornn(ib2,2) = npckge(ib1)
1404	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1405	IF(lwp) WRITE(numout,*)
1406	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1407	& jpindt(ib2), jpjedt(ib1)
1408	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1409	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1410	& ' and North segment: ',npckgn(ib2)
1411	IF(lwp) WRITE(numout,*)
1412	nstop = nstop + 1
1413	ELSE
1414	IF(lwp) WRITE(numout,*)
1415	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and East Open boundary indices'
1416	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1417	& ' and North segment: ',npckgn(ib2)
1418	IF(lwp) WRITE(numout,*)
1419	nstop = nstop + 1
1420	END IF
1421	END IF
1422	END DO
1423	END DO
1424	END IF
1425	!
1426	! 3. Check if segment extremities are on land
1427	!--------------------------------------------
1428	!
1429	! West segments
1430	DO ib = 1, nbdysegw
1431	! get mask at boundary extremities:
1432	ztestmask(1:2)=0.
1433	DO ji = 1, jpi
1434	DO jj = 1, jpj
1435	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1436	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1437	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1438	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1439	END DO
1440	END DO
1441	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1442
1443	IF (ztestmask(1)==1) THEN
1444	IF (icornw(ib,1)==0) THEN
1445	IF(lwp) WRITE(numout,*)
1446	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1447	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1448	IF(lwp) WRITE(numout,*)
1449	nstop = nstop + 1
1450	ELSE
1451	! This is a corner
1452	WRITE(numout,*) 'Found a South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1453	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1454	itest=itest+1
1455	ENDIF
1456	ENDIF
1457	IF (ztestmask(2)==1) THEN
1458	IF (icornw(ib,2)==0) THEN
1459	IF(lwp) WRITE(numout,*)
1460	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1461	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1462	IF(lwp) WRITE(numout,*)
1463	nstop = nstop + 1
1464	ELSE
1465	! This is a corner
1466	WRITE(numout,*) 'Found a North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1467	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1468	itest=itest+1
1469	ENDIF
1470	ENDIF
1471	END DO
1472	!
1473	! East segments
1474	DO ib = 1, nbdysege
1475	! get mask at boundary extremities:
1476	ztestmask(1:2)=0.
1477	DO ji = 1, jpi
1478	DO jj = 1, jpj
1479	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1480	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1481	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1482	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1483	END DO
1484	END DO
1485	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1486
1487	IF (ztestmask(1)==1) THEN
1488	IF (icorne(ib,1)==0) THEN
1489	IF(lwp) WRITE(numout,*)
1490	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1491	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1492	IF(lwp) WRITE(numout,*)
1493	nstop = nstop + 1
1494	ELSE
1495	! This is a corner
1496	WRITE(numout,*) 'Found a South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1497	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1498	itest=itest+1
1499	ENDIF
1500	ENDIF
1501	IF (ztestmask(2)==1) THEN
1502	IF (icorne(ib,2)==0) THEN
1503	IF(lwp) WRITE(numout,*)
1504	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1505	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1506	IF(lwp) WRITE(numout,*)
1507	nstop = nstop + 1
1508	ELSE
1509	! This is a corner
1510	WRITE(numout,*) 'Found a North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1511	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1512	itest=itest+1
1513	ENDIF
1514	ENDIF
1515	END DO
1516	!
1517	! South segments
1518	DO ib = 1, nbdysegs
1519	! get mask at boundary extremities:
1520	ztestmask(1:2)=0.
1521	DO ji = 1, jpi
1522	DO jj = 1, jpj
1523	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1524	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1525	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1526	& ((ji + nimpp - 1) == jpisft(ib))) ztestmask(2)=tmask(ji,jj,1)
1527	END DO
1528	END DO
1529	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1530
1531	IF ((ztestmask(1)==1).AND.(icorns(ib,1)==0)) THEN
1532	IF(lwp) WRITE(numout,*)
1533	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1534	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1535	IF(lwp) WRITE(numout,*)
1536	nstop = nstop + 1
1537	ENDIF
1538	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1539	IF(lwp) WRITE(numout,*)
1540	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1541	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1542	IF(lwp) WRITE(numout,*)
1543	nstop = nstop + 1
1544	ENDIF
1545	END DO
1546	!
1547	! North segments
1548	DO ib = 1, nbdysegn
1549	! get mask at boundary extremities:
1550	ztestmask(1:2)=0.
1551	DO ji = 1, jpi
1552	DO jj = 1, jpj
1553	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1554	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1555	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1556	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1557	END DO
1558	END DO
1559	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1560
1561	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1562	IF(lwp) WRITE(numout,*)
1563	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1564	IF(lwp) WRITE(numout,*) ' ========== does not start on land'
1565	IF(lwp) WRITE(numout,*)
1566	nstop = nstop + 1
1567	ENDIF
1568	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1569	IF(lwp) WRITE(numout,*)
1570	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1571	IF(lwp) WRITE(numout,*) ' ========== does not end on land'
1572	IF(lwp) WRITE(numout,*)
1573	nstop = nstop + 1
1574	ENDIF
1575	END DO
1576	!
1577	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1578	!
1579	! Other tests TBD:
1580	! segments completly on land
1581	! optimized open boundary array length according to landmask
1582	! Nudging layers that overlap with interior domain
1583	!
1584	END SUBROUTINE bdy_ctl_seg
1585
1586	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1587	!!----------------------------------------------------------------------
1588	!! * ROUTINE bdy_ctl_corn *
1589	!!
1590	!! ** Purpose : Check numerical schemes consistency between
1591	!! segments having a common corner
1592	!!
1593	!! ** Method :
1594	!!----------------------------------------------------------------------
1595	INTEGER, INTENT(in) :: ib1, ib2
1596	INTEGER :: itest
1597	!!----------------------------------------------------------------------
1598	itest = 0
1599
1600	IF (nn_dyn2d(ib1)/=nn_dyn2d(ib2)) itest = itest + 1
1601	IF (nn_dyn3d(ib1)/=nn_dyn3d(ib2)) itest = itest + 1
1602	IF (nn_tra(ib1)/=nn_tra(ib2)) itest = itest + 1
1603	!
1604	IF (nn_dyn2d_dta(ib1)/=nn_dyn2d_dta(ib2)) itest = itest + 1
1605	IF (nn_dyn3d_dta(ib1)/=nn_dyn3d_dta(ib2)) itest = itest + 1
1606	IF (nn_tra_dta(ib1)/=nn_tra_dta(ib2)) itest = itest + 1
1607	!
1608	IF (nn_rimwidth(ib1)/=nn_rimwidth(ib2)) itest = itest + 1
1609	!
1610	IF ( itest>0 ) THEN
1611	IF(lwp) WRITE(numout,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1612	IF(lwp) WRITE(numout,*) ' ========== have different open bdy schemes'
1613	IF(lwp) WRITE(numout,*)
1614	nstop = nstop + 1
1615	ENDIF
1616	!
1617	END SUBROUTINE bdy_ctl_corn
1618
1619	#else
1620	!!---------------------------------------------------------------------------------
1621	!! Dummy module NO open boundaries
1622	!!---------------------------------------------------------------------------------
1623	CONTAINS
1624	SUBROUTINE bdy_init ! Dummy routine
1625	END SUBROUTINE bdy_init
1626	#endif
1627
1628	!!=================================================================================
1629	END MODULE bdyini

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