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bdyini.F90 in branches/2013/dev_r3853_CNRS9_ConfSetting/NEMOGCM/NEMO/OPA_SRC/BDY – NEMO

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source: branches/2013/dev_r3853_CNRS9_ConfSetting/NEMOGCM/NEMO/OPA_SRC/BDY/bdyini.F90 @ 3875

Last change on this file since 3875 was 3875, checked in by clevy, 11 years ago
Configuration Setting/Step? 1, see ticket:#1074
Property svn:keywords set to `Id`
File size: 75.3 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	INTEGER :: ios ! Local integer output status for namelist read
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_ref ) ! Namelist nambdy in reference namelist :Unstructured open boundaries
148	READ ( numnam_ref, nambdy, IOSTAT = ios, ERR = 901)
149	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in reference namelist', lwp )
150
151	REWIND( numnam_cfg ) ! Namelist nambdy in configuration namelist :Unstructured open boundaries
152	READ ( numnam_cfg, nambdy, IOSTAT = ios, ERR = 902 )
153	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in configuration namelist', lwp )
154	WRITE ( numond, nambdy )
155
156	! -----------------------------------------
157	! Check and write out namelist parameters
158	! -----------------------------------------
159	! ! control prints
160	IF(lwp) WRITE(numout,*) ' nambdy'
161
162	IF( nb_bdy .eq. 0 ) THEN
163	IF(lwp) WRITE(numout,*) 'nb_bdy = 0, NO OPEN BOUNDARIES APPLIED.'
164	ELSE
165	IF(lwp) WRITE(numout,*) 'Number of open boundary sets : ',nb_bdy
166	ENDIF
167
168	DO ib_bdy = 1,nb_bdy
169	IF(lwp) WRITE(numout,*) ' '
170	IF(lwp) WRITE(numout,*) '------ Open boundary data set ',ib_bdy,'------'
171
172	IF( ln_coords_file(ib_bdy) ) THEN
173	IF(lwp) WRITE(numout,*) 'Boundary definition read from file '//TRIM(cn_coords_file(ib_bdy))
174	ELSE
175	IF(lwp) WRITE(numout,*) 'Boundary defined in namelist.'
176	ENDIF
177	IF(lwp) WRITE(numout,*)
178
179	IF(lwp) WRITE(numout,*) 'Boundary conditions for barotropic solution: '
180	SELECT CASE( nn_dyn2d(ib_bdy) )
181	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
182	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
183	CASE(jp_flather) ; IF(lwp) WRITE(numout,*) ' Flather radiation condition'
184	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_dyn2d' )
185	END SELECT
186	IF( nn_dyn2d(ib_bdy) .gt. 0 ) THEN
187	SELECT CASE( nn_dyn2d_dta(ib_bdy) ) !
188	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
189	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
190	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' tidal harmonic forcing taken from file'
191	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' boundary data AND tidal harmonic forcing taken from files'
192	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn2d_dta must be between 0 and 3' )
193	END SELECT
194	IF (( nn_dyn2d_dta(ib_bdy) .ge. 2 ).AND.(.NOT.lk_tide)) THEN
195	CALL ctl_stop( 'You must activate key_tide to add tidal forcing at open boundaries' )
196	ENDIF
197	ENDIF
198	IF(lwp) WRITE(numout,*)
199
200	IF(lwp) WRITE(numout,*) 'Boundary conditions for baroclinic velocities: '
201	SELECT CASE( nn_dyn3d(ib_bdy) )
202	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
203	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
204	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' Specified value'
205	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' Zero baroclinic velocities (runoff case)'
206	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_dyn3d' )
207	END SELECT
208	IF( nn_dyn3d(ib_bdy) .gt. 0 ) THEN
209	SELECT CASE( nn_dyn3d_dta(ib_bdy) ) !
210	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
211	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
212	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn3d_dta must be 0 or 1' )
213	END SELECT
214	ENDIF
215
216	IF ( ln_dyn3d_dmp(ib_bdy) ) THEN
217	IF ( nn_dyn3d(ib_bdy).EQ.0 ) THEN
218	IF(lwp) WRITE(numout,*) 'No open boundary condition for baroclinic velocities: ln_dyn3d_dmp is set to .false.'
219	ln_dyn3d_dmp(ib_bdy)=.false.
220	ELSEIF ( nn_dyn3d(ib_bdy).EQ.1 ) THEN
221	CALL ctl_stop( 'Use FRS OR relaxation' )
222	ELSE
223	IF(lwp) WRITE(numout,*) ' + baroclinic velocities relaxation zone'
224	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
225	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
226	ENDIF
227	ELSE
228	IF(lwp) WRITE(numout,*) ' NO relaxation on baroclinic velocities'
229	ENDIF
230	IF(lwp) WRITE(numout,*)
231
232	IF(lwp) WRITE(numout,*) 'Boundary conditions for temperature and salinity: '
233	SELECT CASE( nn_tra(ib_bdy) )
234	CASE(jp_none) ; IF(lwp) WRITE(numout,*) ' no open boundary condition'
235	CASE(jp_frs) ; IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
236	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' Specified value'
237	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' Neumann conditions'
238	CASE( 4 ) ; IF(lwp) WRITE(numout,*) ' Runoff conditions : Neumann for T and specified to 0.1 for salinity'
239	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_tra' )
240	END SELECT
241	IF( nn_tra(ib_bdy) .gt. 0 ) THEN
242	SELECT CASE( nn_tra_dta(ib_bdy) ) !
243	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
244	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
245	CASE DEFAULT ; CALL ctl_stop( 'nn_tra_dta must be 0 or 1' )
246	END SELECT
247	ENDIF
248
249	IF ( ln_tra_dmp(ib_bdy) ) THEN
250	IF ( nn_tra(ib_bdy).EQ.0 ) THEN
251	IF(lwp) WRITE(numout,*) 'No open boundary condition for tracers: ln_tra_dmp is set to .false.'
252	ln_tra_dmp(ib_bdy)=.false.
253	ELSEIF ( nn_tra(ib_bdy).EQ.1 ) THEN
254	CALL ctl_stop( 'Use FRS OR relaxation' )
255	ELSE
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	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_tra' )
271	END SELECT
272	IF( nn_ice_lim2(ib_bdy) .gt. 0 ) THEN
273	SELECT CASE( nn_ice_lim2_dta(ib_bdy) ) !
274	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
275	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
276	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_lim2_dta must be 0 or 1' )
277	END SELECT
278	ENDIF
279	IF(lwp) WRITE(numout,*)
280	#endif
281
282	IF(lwp) WRITE(numout,*) ' Width of relaxation zone = ', nn_rimwidth(ib_bdy)
283	IF(lwp) WRITE(numout,*)
284
285	ENDDO
286
287	IF (nb_bdy .gt. 0) THEN
288	IF( ln_vol ) THEN ! check volume conservation (nn_volctl value)
289	IF(lwp) WRITE(numout,*) 'Volume correction applied at open boundaries'
290	IF(lwp) WRITE(numout,*)
291	SELECT CASE ( nn_volctl )
292	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' The total volume will be constant'
293	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' The total volume will vary according to the surface E-P flux'
294	CASE DEFAULT ; CALL ctl_stop( 'nn_volctl must be 0 or 1' )
295	END SELECT
296	IF(lwp) WRITE(numout,*)
297	ELSE
298	IF(lwp) WRITE(numout,*) 'No volume correction applied at open boundaries'
299	IF(lwp) WRITE(numout,*)
300	ENDIF
301	ENDIF
302
303	! -------------------------------------------------
304	! Initialise indices arrays for open boundaries
305	! -------------------------------------------------
306
307	! Work out global dimensions of boundary data
308	! ---------------------------------------------
309	REWIND( numnam_cfg )
310
311	!!----------------------------------------------------------------------
312
313
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 only namelist_cfg to avoid unseccessfull overwrite
332	!! REWIND( numnam_ref ) ! Namelist nambdy_index in reference namelist : Open boundaries indexes
333	!! READ ( numnam_ref, namrun, IOSTAT = ios, ERR = 903)
334	!!903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in reference namelist', lwp )
335
336	!! REWIND( numnam_cfg ) ! Namelist nambdy_index in configuration namelist : Open boundaries indexes
337	READ ( numnam_cfg, nambdy_index, IOSTAT = ios, ERR = 904 )
338	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in configuration namelist', lwp )
339	WRITE ( numond, nambdy_index )
340
341	SELECT CASE ( TRIM(ctypebdy) )
342	CASE( 'N' )
343	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
344	nbdyind = jpjglo - 2 ! set boundary to whole side of model domain.
345	nbdybeg = 2
346	nbdyend = jpiglo - 1
347	ENDIF
348	nbdysegn = nbdysegn + 1
349	npckgn(nbdysegn) = ib_bdy ! Save bdy package number
350	jpjnob(nbdysegn) = nbdyind
351	jpindt(nbdysegn) = nbdybeg
352	jpinft(nbdysegn) = nbdyend
353	!
354	CASE( 'S' )
355	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
356	nbdyind = 2 ! set boundary to whole side of model domain.
357	nbdybeg = 2
358	nbdyend = jpiglo - 1
359	ENDIF
360	nbdysegs = nbdysegs + 1
361	npckgs(nbdysegs) = ib_bdy ! Save bdy package number
362	jpjsob(nbdysegs) = nbdyind
363	jpisdt(nbdysegs) = nbdybeg
364	jpisft(nbdysegs) = nbdyend
365	!
366	CASE( 'E' )
367	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
368	nbdyind = jpiglo - 2 ! set boundary to whole side of model domain.
369	nbdybeg = 2
370	nbdyend = jpjglo - 1
371	ENDIF
372	nbdysege = nbdysege + 1
373	npckge(nbdysege) = ib_bdy ! Save bdy package number
374	jpieob(nbdysege) = nbdyind
375	jpjedt(nbdysege) = nbdybeg
376	jpjeft(nbdysege) = nbdyend
377	!
378	CASE( 'W' )
379	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
380	nbdyind = 2 ! set boundary to whole side of model domain.
381	nbdybeg = 2
382	nbdyend = jpjglo - 1
383	ENDIF
384	nbdysegw = nbdysegw + 1
385	npckgw(nbdysegw) = ib_bdy ! Save bdy package number
386	jpiwob(nbdysegw) = nbdyind
387	jpjwdt(nbdysegw) = nbdybeg
388	jpjwft(nbdysegw) = nbdyend
389	!
390	CASE DEFAULT ; CALL ctl_stop( 'ctypebdy must be N, S, E or W' )
391	END SELECT
392
393	! For simplicity we assume that in case of straight bdy, arrays have the same length
394	! (even if it is true that last tangential velocity points
395	! are useless). This simplifies a little bit boundary data format (and agrees with format
396	! used so far in obc package)
397
398	nblendta(1:jpbgrd,ib_bdy) = (nbdyend - nbdybeg + 1) * nn_rimwidth(ib_bdy)
399	jpbdtas = MAX(jpbdtas, (nbdyend - nbdybeg + 1))
400	IF (lwp.and.(nn_rimwidth(ib_bdy)>nrimmax)) &
401	& CALL ctl_stop( 'rimwidth must be lower than nrimmax' )
402
403	ELSE ! Read size of arrays in boundary coordinates file.
404	CALL iom_open( cn_coords_file(ib_bdy), inum )
405	DO igrd = 1, jpbgrd
406	id_dummy = iom_varid( inum, 'nbi'//cgrid(igrd), kdimsz=kdimsz )
407	nblendta(igrd,ib_bdy) = kdimsz(1)
408	jpbdtau = MAX(jpbdtau, kdimsz(1))
409	ENDDO
410	CALL iom_close( inum )
411
412	ENDIF
413
414	ENDDO ! ib_bdy
415
416	IF (nb_bdy>0) THEN
417	jpbdta = MAXVAL(nblendta(1:jpbgrd,1:nb_bdy))
418
419	! Allocate arrays
420	!---------------
421	ALLOCATE( nbidta(jpbdta, jpbgrd, nb_bdy), nbjdta(jpbdta, jpbgrd, nb_bdy), &
422	& nbrdta(jpbdta, jpbgrd, nb_bdy) )
423
424	ALLOCATE( dta_global(jpbdtau, 1, jpk) )
425	IF ( icount>0 ) ALLOCATE( dta_global2(jpbdtas, nrimmax, jpk) )
426	!
427	ENDIF
428
429	! Now look for crossings in user (namelist) defined open boundary segments:
430	!--------------------------------------------------------------------------
431	IF ( icount>0 ) CALL bdy_ctl_seg
432
433	! Calculate global boundary index arrays or read in from file
434	!------------------------------------------------------------
435	! 1. Read global index arrays from boundary coordinates file.
436	DO ib_bdy = 1, nb_bdy
437
438	IF( ln_coords_file(ib_bdy) ) THEN
439
440	CALL iom_open( cn_coords_file(ib_bdy), inum )
441	DO igrd = 1, jpbgrd
442	CALL iom_get( inum, jpdom_unknown, 'nbi'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
443	DO ii = 1,nblendta(igrd,ib_bdy)
444	nbidta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
445	END DO
446	CALL iom_get( inum, jpdom_unknown, 'nbj'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
447	DO ii = 1,nblendta(igrd,ib_bdy)
448	nbjdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
449	END DO
450	CALL iom_get( inum, jpdom_unknown, 'nbr'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
451	DO ii = 1,nblendta(igrd,ib_bdy)
452	nbrdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
453	END DO
454
455	ibr_max = MAXVAL( nbrdta(:,igrd,ib_bdy) )
456	IF(lwp) WRITE(numout,*)
457	IF(lwp) WRITE(numout,*) ' Maximum rimwidth in file is ', ibr_max
458	IF(lwp) WRITE(numout,*) ' nn_rimwidth from namelist is ', nn_rimwidth(ib_bdy)
459	IF (ibr_max < nn_rimwidth(ib_bdy)) &
460	CALL ctl_stop( 'nn_rimwidth is larger than maximum rimwidth in file',cn_coords_file(ib_bdy) )
461	END DO
462	CALL iom_close( inum )
463
464	ENDIF
465
466	ENDDO
467
468	! 2. Now fill indices corresponding to straight open boundary arrays:
469	! East
470	!-----
471	DO iseg = 1, nbdysege
472	ib_bdy = npckge(iseg)
473	!
474	! ------------ T points -------------
475	igrd=1
476	icount=0
477	DO ir = 1, nn_rimwidth(ib_bdy)
478	DO ij = jpjedt(iseg), jpjeft(iseg)
479	icount = icount + 1
480	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
481	nbjdta(icount, igrd, ib_bdy) = ij
482	nbrdta(icount, igrd, ib_bdy) = ir
483	ENDDO
484	ENDDO
485	!
486	! ------------ U points -------------
487	igrd=2
488	icount=0
489	DO ir = 1, nn_rimwidth(ib_bdy)
490	DO ij = jpjedt(iseg), jpjeft(iseg)
491	icount = icount + 1
492	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 1 - ir
493	nbjdta(icount, igrd, ib_bdy) = ij
494	nbrdta(icount, igrd, ib_bdy) = ir
495	ENDDO
496	ENDDO
497	!
498	! ------------ V points -------------
499	igrd=3
500	icount=0
501	DO ir = 1, nn_rimwidth(ib_bdy)
502	! DO ij = jpjedt(iseg), jpjeft(iseg) - 1
503	DO ij = jpjedt(iseg), jpjeft(iseg)
504	icount = icount + 1
505	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
506	nbjdta(icount, igrd, ib_bdy) = ij
507	nbrdta(icount, igrd, ib_bdy) = ir
508	ENDDO
509	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
510	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
511	ENDDO
512	ENDDO
513	!
514	! West
515	!-----
516	DO iseg = 1, nbdysegw
517	ib_bdy = npckgw(iseg)
518	!
519	! ------------ T points -------------
520	igrd=1
521	icount=0
522	DO ir = 1, nn_rimwidth(ib_bdy)
523	DO ij = jpjwdt(iseg), jpjwft(iseg)
524	icount = icount + 1
525	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
526	nbjdta(icount, igrd, ib_bdy) = ij
527	nbrdta(icount, igrd, ib_bdy) = ir
528	ENDDO
529	ENDDO
530	!
531	! ------------ U points -------------
532	igrd=2
533	icount=0
534	DO ir = 1, nn_rimwidth(ib_bdy)
535	DO ij = jpjwdt(iseg), jpjwft(iseg)
536	icount = icount + 1
537	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
538	nbjdta(icount, igrd, ib_bdy) = ij
539	nbrdta(icount, igrd, ib_bdy) = ir
540	ENDDO
541	ENDDO
542	!
543	! ------------ V points -------------
544	igrd=3
545	icount=0
546	DO ir = 1, nn_rimwidth(ib_bdy)
547	! DO ij = jpjwdt(iseg), jpjwft(iseg) - 1
548	DO ij = jpjwdt(iseg), jpjwft(iseg)
549	icount = icount + 1
550	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
551	nbjdta(icount, igrd, ib_bdy) = ij
552	nbrdta(icount, igrd, ib_bdy) = ir
553	ENDDO
554	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
555	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
556	ENDDO
557	ENDDO
558	!
559	! North
560	!-----
561	DO iseg = 1, nbdysegn
562	ib_bdy = npckgn(iseg)
563	!
564	! ------------ T points -------------
565	igrd=1
566	icount=0
567	DO ir = 1, nn_rimwidth(ib_bdy)
568	DO ii = jpindt(iseg), jpinft(iseg)
569	icount = icount + 1
570	nbidta(icount, igrd, ib_bdy) = ii
571	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
572	nbrdta(icount, igrd, ib_bdy) = ir
573	ENDDO
574	ENDDO
575	!
576	! ------------ U points -------------
577	igrd=2
578	icount=0
579	DO ir = 1, nn_rimwidth(ib_bdy)
580	! DO ii = jpindt(iseg), jpinft(iseg) - 1
581	DO ii = jpindt(iseg), jpinft(iseg)
582	icount = icount + 1
583	nbidta(icount, igrd, ib_bdy) = ii
584	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
585	nbrdta(icount, igrd, ib_bdy) = ir
586	ENDDO
587	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
588	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
589	ENDDO
590	!
591	! ------------ V points -------------
592	igrd=3
593	icount=0
594	DO ir = 1, nn_rimwidth(ib_bdy)
595	DO ii = jpindt(iseg), jpinft(iseg)
596	icount = icount + 1
597	nbidta(icount, igrd, ib_bdy) = ii
598	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 1 - ir
599	nbrdta(icount, igrd, ib_bdy) = ir
600	ENDDO
601	ENDDO
602	ENDDO
603	!
604	! South
605	!-----
606	DO iseg = 1, nbdysegs
607	ib_bdy = npckgs(iseg)
608	!
609	! ------------ T points -------------
610	igrd=1
611	icount=0
612	DO ir = 1, nn_rimwidth(ib_bdy)
613	DO ii = jpisdt(iseg), jpisft(iseg)
614	icount = icount + 1
615	nbidta(icount, igrd, ib_bdy) = ii
616	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
617	nbrdta(icount, igrd, ib_bdy) = ir
618	ENDDO
619	ENDDO
620	!
621	! ------------ U points -------------
622	igrd=2
623	icount=0
624	DO ir = 1, nn_rimwidth(ib_bdy)
625	! DO ii = jpisdt(iseg), jpisft(iseg) - 1
626	DO ii = jpisdt(iseg), jpisft(iseg)
627	icount = icount + 1
628	nbidta(icount, igrd, ib_bdy) = ii
629	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
630	nbrdta(icount, igrd, ib_bdy) = ir
631	ENDDO
632	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
633	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
634	ENDDO
635	!
636	! ------------ V points -------------
637	igrd=3
638	icount=0
639	DO ir = 1, nn_rimwidth(ib_bdy)
640	DO ii = jpisdt(iseg), jpisft(iseg)
641	icount = icount + 1
642	nbidta(icount, igrd, ib_bdy) = ii
643	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
644	nbrdta(icount, igrd, ib_bdy) = ir
645	ENDDO
646	ENDDO
647	ENDDO
648
649	! Deal with duplicated points
650	!-----------------------------
651	! We assign negative indices to duplicated points (to remove them from bdy points to be updated)
652	! if their distance to the bdy is greater than the other
653	! If their distance are the same, just keep only one to avoid updating a point twice
654	DO igrd = 1, jpbgrd
655	DO ib_bdy1 = 1, nb_bdy
656	DO ib_bdy2 = 1, nb_bdy
657	IF (ib_bdy1/=ib_bdy2) THEN
658	DO ib1 = 1, nblendta(igrd,ib_bdy1)
659	DO ib2 = 1, nblendta(igrd,ib_bdy2)
660	IF ((nbidta(ib1, igrd, ib_bdy1)==nbidta(ib2, igrd, ib_bdy2)).AND. &
661	& (nbjdta(ib1, igrd, ib_bdy1)==nbjdta(ib2, igrd, ib_bdy2))) THEN
662	! IF ((lwp).AND.(igrd==1)) WRITE(numout,*) ' found coincident point ji, jj:', &
663	! & nbidta(ib1, igrd, ib_bdy1), &
664	! & nbjdta(ib2, igrd, ib_bdy2)
665	! keep only points with the lowest distance to boundary:
666	IF (nbrdta(ib1, igrd, ib_bdy1)<nbrdta(ib2, igrd, ib_bdy2)) THEN
667	nbidta(ib2, igrd, ib_bdy2) =-ib_bdy2
668	nbjdta(ib2, igrd, ib_bdy2) =-ib_bdy2
669	ELSEIF (nbrdta(ib1, igrd, ib_bdy1)>nbrdta(ib2, igrd, ib_bdy2)) THEN
670	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
671	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
672	! Arbitrary choice if distances are the same:
673	ELSE
674	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
675	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
676	ENDIF
677	END IF
678	END DO
679	END DO
680	ENDIF
681	END DO
682	END DO
683	END DO
684
685	! Work out dimensions of boundary data on each processor
686	! ------------------------------------------------------
687
688	! Rather assume that boundary data indices are given on global domain
689	! TO BE DISCUSSED ?
690	! iw = mig(1) + 1 ! if monotasking and no zoom, iw=2
691	! ie = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
692	! is = mjg(1) + 1 ! if monotasking and no zoom, is=2
693	! in = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
694	iw = mig(1) - jpizoom + 2 ! if monotasking and no zoom, iw=2
695	ie = mig(1) + nlci - jpizoom - 1 ! if monotasking and no zoom, ie=jpim1
696	is = mjg(1) - jpjzoom + 2 ! if monotasking and no zoom, is=2
697	in = mjg(1) + nlcj - jpjzoom - 1 ! if monotasking and no zoom, in=jpjm1
698
699	ALLOCATE( nbondi_bdy(nb_bdy))
700	ALLOCATE( nbondj_bdy(nb_bdy))
701	nbondi_bdy(:)=2
702	nbondj_bdy(:)=2
703	ALLOCATE( nbondi_bdy_b(nb_bdy))
704	ALLOCATE( nbondj_bdy_b(nb_bdy))
705	nbondi_bdy_b(:)=2
706	nbondj_bdy_b(:)=2
707
708	! Work out dimensions of boundary data on each neighbour process
709	IF(nbondi .eq. 0) 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
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	ELSEIF(nbondi .eq. 1) THEN
720	iw_b(1) = jpizoom + nimppt(nowe+1)
721	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
722	is_b(1) = jpjzoom + njmppt(nowe+1)
723	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
724	ELSEIF(nbondi .eq. -1) THEN
725	iw_b(2) = jpizoom + nimppt(noea+1)
726	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
727	is_b(2) = jpjzoom + njmppt(noea+1)
728	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
729	ENDIF
730
731	IF(nbondj .eq. 0) 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
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	ELSEIF(nbondj .eq. 1) THEN
742	iw_b(3) = jpizoom + nimppt(noso+1)
743	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
744	is_b(3) = jpjzoom + njmppt(noso+1)
745	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
746	ELSEIF(nbondj .eq. -1) THEN
747	iw_b(4) = jpizoom + nimppt(nono+1)
748	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
749	is_b(4) = jpjzoom + njmppt(nono+1)
750	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
751	ENDIF
752
753	DO ib_bdy = 1, nb_bdy
754	DO igrd = 1, jpbgrd
755	icount = 0
756	icountr = 0
757	idx_bdy(ib_bdy)%nblen(igrd) = 0
758	idx_bdy(ib_bdy)%nblenrim(igrd) = 0
759	DO ib = 1, nblendta(igrd,ib_bdy)
760	! check that data is in correct order in file
761	ibm1 = MAX(1,ib-1)
762	IF(lwp) THEN ! Since all procs read global data only need to do this check on one proc...
763	IF( nbrdta(ib,igrd,ib_bdy) < nbrdta(ibm1,igrd,ib_bdy) ) THEN
764	CALL ctl_stop('bdy_init : ERROR : boundary data in file &
765	must be defined in order of distance from edge nbr.', &
766	'A utility for re-ordering boundary coordinates and data &
767	files exists in the TOOLS/OBC directory')
768	ENDIF
769	ENDIF
770	! check if point is in local domain
771	IF( nbidta(ib,igrd,ib_bdy) >= iw .AND. nbidta(ib,igrd,ib_bdy) <= ie .AND. &
772	& nbjdta(ib,igrd,ib_bdy) >= is .AND. nbjdta(ib,igrd,ib_bdy) <= in ) THEN
773	!
774	icount = icount + 1
775	!
776	IF( nbrdta(ib,igrd,ib_bdy) == 1 ) icountr = icountr+1
777	ENDIF
778	ENDDO
779	idx_bdy(ib_bdy)%nblenrim(igrd) = icountr !: length of rim boundary data on each proc
780	idx_bdy(ib_bdy)%nblen (igrd) = icount !: length of boundary data on each proc
781	ENDDO ! igrd
782
783	! Allocate index arrays for this boundary set
784	!--------------------------------------------
785	ilen1 = MAXVAL(idx_bdy(ib_bdy)%nblen(:))
786	ALLOCATE( idx_bdy(ib_bdy)%nbi(ilen1,jpbgrd) )
787	ALLOCATE( idx_bdy(ib_bdy)%nbj(ilen1,jpbgrd) )
788	ALLOCATE( idx_bdy(ib_bdy)%nbr(ilen1,jpbgrd) )
789	ALLOCATE( idx_bdy(ib_bdy)%nbd(ilen1,jpbgrd) )
790	ALLOCATE( idx_bdy(ib_bdy)%nbmap(ilen1,jpbgrd) )
791	ALLOCATE( idx_bdy(ib_bdy)%nbw(ilen1,jpbgrd) )
792	ALLOCATE( idx_bdy(ib_bdy)%flagu(ilen1) )
793	ALLOCATE( idx_bdy(ib_bdy)%flagv(ilen1) )
794
795	! Dispatch mapping indices and discrete distances on each processor
796	! -----------------------------------------------------------------
797
798	com_east = 0
799	com_west = 0
800	com_south = 0
801	com_north = 0
802
803	com_east_b = 0
804	com_west_b = 0
805	com_south_b = 0
806	com_north_b = 0
807	DO igrd = 1, jpbgrd
808	icount = 0
809	! Loop on rimwidth to ensure outermost points come first in the local arrays.
810	DO ir=1, nn_rimwidth(ib_bdy)
811	DO ib = 1, nblendta(igrd,ib_bdy)
812	! check if point is in local domain and equals ir
813	IF( nbidta(ib,igrd,ib_bdy) >= iw .AND. nbidta(ib,igrd,ib_bdy) <= ie .AND. &
814	& nbjdta(ib,igrd,ib_bdy) >= is .AND. nbjdta(ib,igrd,ib_bdy) <= in .AND. &
815	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
816	!
817	icount = icount + 1
818
819	! Rather assume that boundary data indices are given on global domain
820	! TO BE DISCUSSED ?
821	! idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
822	! idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
823	idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+jpizoom
824	idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+jpjzoom
825	! check if point has to be sent
826	ii = idx_bdy(ib_bdy)%nbi(icount,igrd)
827	ij = idx_bdy(ib_bdy)%nbj(icount,igrd)
828	if((com_east .ne. 1) .and. (ii .eq. (nlci-1)) .and. (nbondi .le. 0)) then
829	com_east = 1
830	elseif((com_west .ne. 1) .and. (ii .eq. 2) .and. (nbondi .ge. 0) .and. (nbondi .ne. 2)) then
831	com_west = 1
832	endif
833	if((com_south .ne. 1) .and. (ij .eq. 2) .and. (nbondj .ge. 0) .and. (nbondj .ne. 2)) then
834	com_south = 1
835	elseif((com_north .ne. 1) .and. (ij .eq. (nlcj-1)) .and. (nbondj .le. 0)) then
836	com_north = 1
837	endif
838	idx_bdy(ib_bdy)%nbr(icount,igrd) = nbrdta(ib,igrd,ib_bdy)
839	idx_bdy(ib_bdy)%nbmap(icount,igrd) = ib
840	ENDIF
841	! check if point has to be received from a neighbour
842	IF(nbondi .eq. 0) THEN
843	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
844	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
845	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
846	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
847	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
848	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
849	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
850	com_south = 1
851	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
852	com_north = 1
853	endif
854	com_west_b = 1
855	endif
856	ENDIF
857	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
858	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
859	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
860	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
861	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
862	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
863	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
864	com_south = 1
865	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
866	com_north = 1
867	endif
868	com_east_b = 1
869	endif
870	ENDIF
871	ELSEIF(nbondi .eq. 1) THEN
872	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
873	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
874	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
875	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
876	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
877	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
878	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
879	com_south = 1
880	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
881	com_north = 1
882	endif
883	com_west_b = 1
884	endif
885	ENDIF
886	ELSEIF(nbondi .eq. -1) THEN
887	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
888	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
889	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
890	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
891	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
892	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
893	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
894	com_south = 1
895	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
896	com_north = 1
897	endif
898	com_east_b = 1
899	endif
900	ENDIF
901	ENDIF
902	IF(nbondj .eq. 0) THEN
903	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
904	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
905	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
906	com_north_b = 1
907	ENDIF
908	IF(com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 &
909	&.OR. nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
910	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
911	com_south_b = 1
912	ENDIF
913	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
914	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
915	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
916	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
917	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
918	com_south_b = 1
919	endif
920	ENDIF
921	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
922	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
923	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
924	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
925	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
926	com_north_b = 1
927	endif
928	ENDIF
929	ELSEIF(nbondj .eq. 1) THEN
930	IF( com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 .OR. &
931	& nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
932	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
933	com_south_b = 1
934	ENDIF
935	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
936	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
937	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
938	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
939	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
940	com_south_b = 1
941	endif
942	ENDIF
943	ELSEIF(nbondj .eq. -1) THEN
944	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
945	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
946	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
947	com_north_b = 1
948	ENDIF
949	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
950	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
951	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
952	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
953	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
954	com_north_b = 1
955	endif
956	ENDIF
957	ENDIF
958	ENDDO
959	ENDDO
960	ENDDO
961	! definition of the i- and j- direction local boundaries arrays
962	! used for sending the boudaries
963	IF((com_east .eq. 1) .and. (com_west .eq. 1)) THEN
964	nbondi_bdy(ib_bdy) = 0
965	ELSEIF ((com_east .eq. 1) .and. (com_west .eq. 0)) THEN
966	nbondi_bdy(ib_bdy) = -1
967	ELSEIF ((com_east .eq. 0) .and. (com_west .eq. 1)) THEN
968	nbondi_bdy(ib_bdy) = 1
969	ENDIF
970
971	IF((com_north .eq. 1) .and. (com_south .eq. 1)) THEN
972	nbondj_bdy(ib_bdy) = 0
973	ELSEIF ((com_north .eq. 1) .and. (com_south .eq. 0)) THEN
974	nbondj_bdy(ib_bdy) = -1
975	ELSEIF ((com_north .eq. 0) .and. (com_south .eq. 1)) THEN
976	nbondj_bdy(ib_bdy) = 1
977	ENDIF
978
979	! definition of the i- and j- direction local boundaries arrays
980	! used for receiving the boudaries
981	IF((com_east_b .eq. 1) .and. (com_west_b .eq. 1)) THEN
982	nbondi_bdy_b(ib_bdy) = 0
983	ELSEIF ((com_east_b .eq. 1) .and. (com_west_b .eq. 0)) THEN
984	nbondi_bdy_b(ib_bdy) = -1
985	ELSEIF ((com_east_b .eq. 0) .and. (com_west_b .eq. 1)) THEN
986	nbondi_bdy_b(ib_bdy) = 1
987	ENDIF
988
989	IF((com_north_b .eq. 1) .and. (com_south_b .eq. 1)) THEN
990	nbondj_bdy_b(ib_bdy) = 0
991	ELSEIF ((com_north_b .eq. 1) .and. (com_south_b .eq. 0)) THEN
992	nbondj_bdy_b(ib_bdy) = -1
993	ELSEIF ((com_north_b .eq. 0) .and. (com_south_b .eq. 1)) THEN
994	nbondj_bdy_b(ib_bdy) = 1
995	ENDIF
996
997	! Compute rim weights for FRS scheme
998	! ----------------------------------
999	DO igrd = 1, jpbgrd
1000	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1001	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1002	idx_bdy(ib_bdy)%nbw(ib,igrd) = 1.- TANH( FLOAT( nbr - 1 ) *0.5 ) ! tanh formulation
1003	! idx_bdy(ib_bdy)%nbw(ib,igrd) = (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))**2. ! quadratic
1004	! idx_bdy(ib_bdy)%nbw(ib,igrd) = FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)) ! linear
1005	END DO
1006	END DO
1007
1008	! Compute damping coefficients
1009	! ----------------------------
1010	DO igrd = 1, jpbgrd
1011	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1012	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1013	idx_bdy(ib_bdy)%nbd(ib,igrd) = 1. / ( rn_time_dmp(ib_bdy) * rday ) &
1014	& (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))*2. ! quadratic
1015	END DO
1016	END DO
1017
1018	ENDDO
1019
1020	! ------------------------------------------------------
1021	! Initialise masks and find normal/tangential directions
1022	! ------------------------------------------------------
1023
1024	! Read global 2D mask at T-points: bdytmask
1025	! -----------------------------------------
1026	! bdytmask = 1 on the computational domain AND on open boundaries
1027	! = 0 elsewhere
1028
1029	IF( ln_mask_file ) THEN
1030	CALL iom_open( cn_mask_file, inum )
1031	CALL iom_get ( inum, jpdom_data, 'bdy_msk', bdytmask(:,:) )
1032	CALL iom_close( inum )
1033
1034	! Derive mask on U and V grid from mask on T grid
1035	bdyumask(:,:) = 0.e0
1036	bdyvmask(:,:) = 0.e0
1037	DO ij=1, jpjm1
1038	DO ii=1, jpim1
1039	bdyumask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii+1, ij )
1040	bdyvmask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii ,ij+1)
1041	END DO
1042	END DO
1043	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. ) ! Lateral boundary cond.
1044
1045
1046	! Mask corrections
1047	! ----------------
1048	DO ik = 1, jpkm1
1049	DO ij = 1, jpj
1050	DO ii = 1, jpi
1051	tmask(ii,ij,ik) = tmask(ii,ij,ik) * bdytmask(ii,ij)
1052	umask(ii,ij,ik) = umask(ii,ij,ik) * bdyumask(ii,ij)
1053	vmask(ii,ij,ik) = vmask(ii,ij,ik) * bdyvmask(ii,ij)
1054	bmask(ii,ij) = bmask(ii,ij) * bdytmask(ii,ij)
1055	END DO
1056	END DO
1057	END DO
1058
1059	DO ik = 1, jpkm1
1060	DO ij = 2, jpjm1
1061	DO ii = 2, jpim1
1062	fmask(ii,ij,ik) = fmask(ii,ij,ik) * bdytmask(ii,ij ) * bdytmask(ii+1,ij ) &
1063	& * bdytmask(ii,ij+1) * bdytmask(ii+1,ij+1)
1064	END DO
1065	END DO
1066	END DO
1067
1068	tmask_i (:,:) = tmask(:,:,1) * tmask_i(:,:)
1069
1070	ENDIF ! ln_mask_file=.TRUE.
1071
1072	bdytmask(:,:) = tmask(:,:,1)
1073
1074	! bdy masks and bmask are now set to zero on boundary points:
1075	igrd = 1 ! In the free surface case, bmask is at T-points
1076	DO ib_bdy = 1, nb_bdy
1077	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1078	bmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1079	ENDDO
1080	ENDDO
1081	!
1082	igrd = 1
1083	DO ib_bdy = 1, nb_bdy
1084	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1085	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1086	ENDDO
1087	ENDDO
1088	!
1089	igrd = 2
1090	DO ib_bdy = 1, nb_bdy
1091	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1092	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1093	ENDDO
1094	ENDDO
1095	!
1096	igrd = 3
1097	DO ib_bdy = 1, nb_bdy
1098	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1099	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1100	ENDDO
1101	ENDDO
1102
1103	! Lateral boundary conditions
1104	CALL lbc_lnk( fmask , 'F', 1. ) ; CALL lbc_lnk( bdytmask(:,:), 'T', 1. )
1105	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. )
1106
1107	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1108
1109	idx_bdy(ib_bdy)%flagu(:) = 0.e0
1110	idx_bdy(ib_bdy)%flagv(:) = 0.e0
1111	icount = 0
1112
1113	!flagu = -1 : u component is normal to the dynamical boundary but its direction is outward
1114	!flagu = 0 : u is tangential
1115	!flagu = 1 : u is normal to the boundary and is direction is inward
1116
1117	igrd = 2 ! u-component
1118	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1119	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1120	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1121	zefl = bdytmask(nbi ,nbj)
1122	zwfl = bdytmask(nbi+1,nbj)
1123	IF( zefl + zwfl == 2 ) THEN
1124	icount = icount + 1
1125	ELSE
1126	idx_bdy(ib_bdy)%flagu(ib)=-zefl+zwfl
1127	ENDIF
1128	END DO
1129
1130	!flagv = -1 : u component is normal to the dynamical boundary but its direction is outward
1131	!flagv = 0 : u is tangential
1132	!flagv = 1 : u is normal to the boundary and is direction is inward
1133
1134	igrd = 3 ! v-component
1135	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1136	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1137	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1138	znfl = bdytmask(nbi,nbj )
1139	zsfl = bdytmask(nbi,nbj+1)
1140	IF( znfl + zsfl == 2 ) THEN
1141	icount = icount + 1
1142	ELSE
1143	idx_bdy(ib_bdy)%flagv(ib) = -znfl + zsfl
1144	END IF
1145	END DO
1146
1147	IF( icount /= 0 ) THEN
1148	IF(lwp) WRITE(numout,*)
1149	IF(lwp) WRITE(numout,*) ' E R R O R : Some data velocity points,', &
1150	' are not boundary points. Check nbi, nbj, indices for boundary set ',ib_bdy
1151	IF(lwp) WRITE(numout,*) ' ========== '
1152	IF(lwp) WRITE(numout,*)
1153	nstop = nstop + 1
1154	ENDIF
1155
1156	ENDDO
1157
1158	! Compute total lateral surface for volume correction:
1159	! ----------------------------------------------------
1160	! JC: this must be done at each time step with key_vvl
1161	bdysurftot = 0.e0
1162	IF( ln_vol ) THEN
1163	igrd = 2 ! Lateral surface at U-points
1164	DO ib_bdy = 1, nb_bdy
1165	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1166	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1167	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1168	flagu => idx_bdy(ib_bdy)%flagu(ib)
1169	bdysurftot = bdysurftot + hu (nbi , nbj) &
1170	& * e2u (nbi , nbj) * ABS( flagu ) &
1171	& * tmask_i(nbi , nbj) &
1172	& * tmask_i(nbi+1, nbj)
1173	ENDDO
1174	ENDDO
1175
1176	igrd=3 ! Add lateral surface at V-points
1177	DO ib_bdy = 1, nb_bdy
1178	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1179	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1180	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1181	flagv => idx_bdy(ib_bdy)%flagv(ib)
1182	bdysurftot = bdysurftot + hv (nbi, nbj ) &
1183	& * e1v (nbi, nbj ) * ABS( flagv ) &
1184	& * tmask_i(nbi, nbj ) &
1185	& * tmask_i(nbi, nbj+1)
1186	ENDDO
1187	ENDDO
1188	!
1189	IF( lk_mpp ) CALL mpp_sum( bdysurftot ) ! sum over the global domain
1190	END IF
1191	!
1192	! Tidy up
1193	!--------
1194	IF (nb_bdy>0) THEN
1195	DEALLOCATE(nbidta, nbjdta, nbrdta)
1196	ENDIF
1197
1198	IF( nn_timing == 1 ) CALL timing_stop('bdy_init')
1199
1200	END SUBROUTINE bdy_init
1201
1202	SUBROUTINE bdy_ctl_seg
1203	!!----------------------------------------------------------------------
1204	!! * ROUTINE bdy_ctl_seg *
1205	!!
1206	!! ** Purpose : Check straight open boundary segments location
1207	!!
1208	!! ** Method : - Look for open boundary corners
1209	!! - Check that segments start or end on land
1210	!!----------------------------------------------------------------------
1211	INTEGER :: ib, ib1, ib2, ji ,jj, itest
1212	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1213	REAL(wp), DIMENSION(2) :: ztestmask
1214	!!----------------------------------------------------------------------
1215	!
1216	IF (lwp) WRITE(numout,*) ' '
1217	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1218	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1219	!
1220	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1221	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1222	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1223	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1224	! 1. Check bounds
1225	!----------------
1226	DO ib = 1, nbdysegn
1227	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1228	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1229	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1230	IF (jpindt(ib).ge.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1231	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1232	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1233	END DO
1234	!
1235	DO ib = 1, nbdysegs
1236	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1237	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1238	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1239	IF (jpisdt(ib).ge.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1240	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1241	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1242	END DO
1243	!
1244	DO ib = 1, nbdysege
1245	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1246	IF ((jpieob(ib).ge.jpiglo-1).or.&
1247	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1248	IF (jpjedt(ib).ge.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1249	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1250	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1251	END DO
1252	!
1253	DO ib = 1, nbdysegw
1254	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1255	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1256	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1257	IF (jpjwdt(ib).ge.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1258	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1259	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1260	ENDDO
1261	!
1262	!
1263	! 2. Look for segment crossings
1264	!------------------------------
1265	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1266	!
1267	itest = 0 ! corner number
1268	!
1269	! flag to detect if start or end of open boundary belongs to a corner
1270	! if not (=0), it must be on land.
1271	! if a corner is detected, save bdy package number for further tests
1272	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1273	! South/West crossings
1274	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1275	DO ib1 = 1, nbdysegw
1276	DO ib2 = 1, nbdysegs
1277	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1278	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1279	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1280	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1281	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1282	! We have a possible South-West corner
1283	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1284	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1285	icornw(ib1,1) = npckgs(ib2)
1286	icorns(ib2,1) = npckgw(ib1)
1287	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1288	IF(lwp) WRITE(numout,*)
1289	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1290	& jpisft(ib2), jpjwft(ib1)
1291	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1292	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1293	& ' and South segment: ',npckgs(ib2)
1294	IF(lwp) WRITE(numout,*)
1295	nstop = nstop + 1
1296	ELSE
1297	IF(lwp) WRITE(numout,*)
1298	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and West Open boundary indices'
1299	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1300	& ' and South segment: ',npckgs(ib2)
1301	IF(lwp) WRITE(numout,*)
1302	nstop = nstop+1
1303	END IF
1304	END IF
1305	END DO
1306	END DO
1307	END IF
1308	!
1309	! South/East crossings
1310	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1311	DO ib1 = 1, nbdysege
1312	DO ib2 = 1, nbdysegs
1313	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1314	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1315	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1316	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1317	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1318	! We have a possible South-East corner
1319	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1320	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1321	icorne(ib1,1) = npckgs(ib2)
1322	icorns(ib2,2) = npckge(ib1)
1323	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1324	IF(lwp) WRITE(numout,*)
1325	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1326	& jpisdt(ib2), jpjeft(ib1)
1327	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1328	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1329	& ' and South segment: ',npckgs(ib2)
1330	IF(lwp) WRITE(numout,*)
1331	nstop = nstop + 1
1332	ELSE
1333	IF(lwp) WRITE(numout,*)
1334	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and East Open boundary indices'
1335	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1336	& ' and South segment: ',npckgs(ib2)
1337	IF(lwp) WRITE(numout,*)
1338	nstop = nstop + 1
1339	END IF
1340	END IF
1341	END DO
1342	END DO
1343	END IF
1344	!
1345	! North/West crossings
1346	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1347	DO ib1 = 1, nbdysegw
1348	DO ib2 = 1, nbdysegn
1349	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1350	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1351	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1352	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1353	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1354	! We have a possible North-West corner
1355	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1356	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1357	icornw(ib1,2) = npckgn(ib2)
1358	icornn(ib2,1) = npckgw(ib1)
1359	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1360	IF(lwp) WRITE(numout,*)
1361	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1362	& jpinft(ib2), jpjwdt(ib1)
1363	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1364	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1365	& ' and North segment: ',npckgn(ib2)
1366	IF(lwp) WRITE(numout,*)
1367	nstop = nstop + 1
1368	ELSE
1369	IF(lwp) WRITE(numout,*)
1370	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and West Open boundary indices'
1371	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1372	& ' and North segment: ',npckgn(ib2)
1373	IF(lwp) WRITE(numout,*)
1374	nstop = nstop + 1
1375	END IF
1376	END IF
1377	END DO
1378	END DO
1379	END IF
1380	!
1381	! North/East crossings
1382	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1383	DO ib1 = 1, nbdysege
1384	DO ib2 = 1, nbdysegn
1385	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1386	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1387	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1388	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1389	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1390	! We have a possible North-East corner
1391	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1392	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1393	icorne(ib1,2) = npckgn(ib2)
1394	icornn(ib2,2) = npckge(ib1)
1395	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1396	IF(lwp) WRITE(numout,*)
1397	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1398	& jpindt(ib2), jpjedt(ib1)
1399	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1400	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1401	& ' and North segment: ',npckgn(ib2)
1402	IF(lwp) WRITE(numout,*)
1403	nstop = nstop + 1
1404	ELSE
1405	IF(lwp) WRITE(numout,*)
1406	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and East Open boundary indices'
1407	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1408	& ' and North segment: ',npckgn(ib2)
1409	IF(lwp) WRITE(numout,*)
1410	nstop = nstop + 1
1411	END IF
1412	END IF
1413	END DO
1414	END DO
1415	END IF
1416	!
1417	! 3. Check if segment extremities are on land
1418	!--------------------------------------------
1419	!
1420	! West segments
1421	DO ib = 1, nbdysegw
1422	! get mask at boundary extremities:
1423	ztestmask(1:2)=0.
1424	DO ji = 1, jpi
1425	DO jj = 1, jpj
1426	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1427	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1428	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1429	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1430	END DO
1431	END DO
1432	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1433
1434	IF (ztestmask(1)==1) THEN
1435	IF (icornw(ib,1)==0) THEN
1436	IF(lwp) WRITE(numout,*)
1437	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1438	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1439	IF(lwp) WRITE(numout,*)
1440	nstop = nstop + 1
1441	ELSE
1442	! This is a corner
1443	WRITE(numout,*) 'Found a South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1444	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1445	itest=itest+1
1446	ENDIF
1447	ENDIF
1448	IF (ztestmask(2)==1) THEN
1449	IF (icornw(ib,2)==0) THEN
1450	IF(lwp) WRITE(numout,*)
1451	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1452	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1453	IF(lwp) WRITE(numout,*)
1454	nstop = nstop + 1
1455	ELSE
1456	! This is a corner
1457	WRITE(numout,*) 'Found a North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1458	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1459	itest=itest+1
1460	ENDIF
1461	ENDIF
1462	END DO
1463	!
1464	! East segments
1465	DO ib = 1, nbdysege
1466	! get mask at boundary extremities:
1467	ztestmask(1:2)=0.
1468	DO ji = 1, jpi
1469	DO jj = 1, jpj
1470	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1471	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1472	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1473	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1474	END DO
1475	END DO
1476	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1477
1478	IF (ztestmask(1)==1) THEN
1479	IF (icorne(ib,1)==0) THEN
1480	IF(lwp) WRITE(numout,*)
1481	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1482	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1483	IF(lwp) WRITE(numout,*)
1484	nstop = nstop + 1
1485	ELSE
1486	! This is a corner
1487	WRITE(numout,*) 'Found a South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1488	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1489	itest=itest+1
1490	ENDIF
1491	ENDIF
1492	IF (ztestmask(2)==1) THEN
1493	IF (icorne(ib,2)==0) THEN
1494	IF(lwp) WRITE(numout,*)
1495	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1496	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1497	IF(lwp) WRITE(numout,*)
1498	nstop = nstop + 1
1499	ELSE
1500	! This is a corner
1501	WRITE(numout,*) 'Found a North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1502	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1503	itest=itest+1
1504	ENDIF
1505	ENDIF
1506	END DO
1507	!
1508	! South segments
1509	DO ib = 1, nbdysegs
1510	! get mask at boundary extremities:
1511	ztestmask(1:2)=0.
1512	DO ji = 1, jpi
1513	DO jj = 1, jpj
1514	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1515	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1516	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1517	& ((ji + nimpp - 1) == jpisft(ib))) ztestmask(2)=tmask(ji,jj,1)
1518	END DO
1519	END DO
1520	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1521
1522	IF ((ztestmask(1)==1).AND.(icorns(ib,1)==0)) THEN
1523	IF(lwp) WRITE(numout,*)
1524	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1525	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1526	IF(lwp) WRITE(numout,*)
1527	nstop = nstop + 1
1528	ENDIF
1529	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1530	IF(lwp) WRITE(numout,*)
1531	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1532	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1533	IF(lwp) WRITE(numout,*)
1534	nstop = nstop + 1
1535	ENDIF
1536	END DO
1537	!
1538	! North segments
1539	DO ib = 1, nbdysegn
1540	! get mask at boundary extremities:
1541	ztestmask(1:2)=0.
1542	DO ji = 1, jpi
1543	DO jj = 1, jpj
1544	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1545	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1546	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1547	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1548	END DO
1549	END DO
1550	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1551
1552	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1553	IF(lwp) WRITE(numout,*)
1554	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1555	IF(lwp) WRITE(numout,*) ' ========== does not start on land'
1556	IF(lwp) WRITE(numout,*)
1557	nstop = nstop + 1
1558	ENDIF
1559	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1560	IF(lwp) WRITE(numout,*)
1561	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1562	IF(lwp) WRITE(numout,*) ' ========== does not end on land'
1563	IF(lwp) WRITE(numout,*)
1564	nstop = nstop + 1
1565	ENDIF
1566	END DO
1567	!
1568	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1569	!
1570	! Other tests TBD:
1571	! segments completly on land
1572	! optimized open boundary array length according to landmask
1573	! Nudging layers that overlap with interior domain
1574	!
1575	END SUBROUTINE bdy_ctl_seg
1576
1577	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1578	!!----------------------------------------------------------------------
1579	!! * ROUTINE bdy_ctl_corn *
1580	!!
1581	!! ** Purpose : Check numerical schemes consistency between
1582	!! segments having a common corner
1583	!!
1584	!! ** Method :
1585	!!----------------------------------------------------------------------
1586	INTEGER, INTENT(in) :: ib1, ib2
1587	INTEGER :: itest
1588	!!----------------------------------------------------------------------
1589	itest = 0
1590
1591	IF (nn_dyn2d(ib1)/=nn_dyn2d(ib2)) itest = itest + 1
1592	IF (nn_dyn3d(ib1)/=nn_dyn3d(ib2)) itest = itest + 1
1593	IF (nn_tra(ib1)/=nn_tra(ib2)) itest = itest + 1
1594	!
1595	IF (nn_dyn2d_dta(ib1)/=nn_dyn2d_dta(ib2)) itest = itest + 1
1596	IF (nn_dyn3d_dta(ib1)/=nn_dyn3d_dta(ib2)) itest = itest + 1
1597	IF (nn_tra_dta(ib1)/=nn_tra_dta(ib2)) itest = itest + 1
1598	!
1599	IF (nn_rimwidth(ib1)/=nn_rimwidth(ib2)) itest = itest + 1
1600	!
1601	IF ( itest>0 ) THEN
1602	IF(lwp) WRITE(numout,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1603	IF(lwp) WRITE(numout,*) ' ========== have different open bdy schemes'
1604	IF(lwp) WRITE(numout,*)
1605	nstop = nstop + 1
1606	ENDIF
1607	!
1608	END SUBROUTINE bdy_ctl_corn
1609
1610	#else
1611	!!---------------------------------------------------------------------------------
1612	!! Dummy module NO open boundaries
1613	!!---------------------------------------------------------------------------------
1614	CONTAINS
1615	SUBROUTINE bdy_init ! Dummy routine
1616	END SUBROUTINE bdy_init
1617	#endif
1618
1619	!!=================================================================================
1620	END MODULE bdyini

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