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bdyini.F90 in branches/2014/dev_r4621_NOC4_BDY_VERT_INTERP/NEMOGCM/NEMO/OPA_SRC/BDY – NEMO

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source: branches/2014/dev_r4621_NOC4_BDY_VERT_INTERP/NEMOGCM/NEMO/OPA_SRC/BDY/bdyini.F90 @ 5901

Last change on this file since 5901 was 5901, checked in by jamesharle, 8 years ago
merging branch with head of the trunk
Property svn:keywords set to `Id`
File size: 84.1 KB

Line
1	MODULE bdyini
2	!!======================================================================
3	!! * MODULE bdyini *
4	!! Unstructured open boundaries : initialisation
5	!!======================================================================
6	!! History : 1.0 ! 2005-01 (J. Chanut, A. Sellar) Original code
7	!! - ! 2007-01 (D. Storkey) Update to use IOM module
8	!! - ! 2007-01 (D. Storkey) Tidal forcing
9	!! 3.0 ! 2008-04 (NEMO team) add in the reference version
10	!! 3.3 ! 2010-09 (E.O'Dea) updates for Shelf configurations
11	!! 3.3 ! 2010-09 (D.Storkey) add ice boundary conditions
12	!! 3.4 ! 2011 (D. Storkey) rewrite in preparation for OBC-BDY merge
13	!! 3.4 ! 2012 (J. Chanut) straight open boundary case update
14	!! 3.5 ! 2012 (S. Mocavero, I. Epicoco) Updates for the
15	!! optimization of BDY communications
16	!!----------------------------------------------------------------------
17	#if defined key_bdy
18	!!----------------------------------------------------------------------
19	!! 'key_bdy' Unstructured Open Boundary Conditions
20	!!----------------------------------------------------------------------
21	!! bdy_init : Initialization of unstructured open boundaries
22	!!----------------------------------------------------------------------
23	USE wrk_nemo ! Memory Allocation
24	USE timing ! Timing
25	USE oce ! ocean dynamics and tracers variables
26	USE dom_oce ! ocean space and time domain
27	USE bdy_oce ! unstructured open boundary conditions
28	USE in_out_manager ! I/O units
29	USE lbclnk ! ocean lateral boundary conditions (or mpp link)
30	USE lib_mpp ! for mpp_sum
31	USE iom ! I/O
32	USE sbctide, ONLY: lk_tide ! Tidal forcing or not
33	USE phycst, ONLY: rday
34
35	IMPLICIT NONE
36	PRIVATE
37
38	PUBLIC bdy_init ! routine called in nemo_init
39
40	INTEGER, PARAMETER :: jp_nseg = 100
41	INTEGER, PARAMETER :: nrimmax = 20 ! maximum rimwidth in structured
42	! open boundary data files
43	! Straight open boundary segment parameters:
44	INTEGER :: nbdysege, nbdysegw, nbdysegn, nbdysegs
45	INTEGER, DIMENSION(jp_nseg) :: jpieob, jpjedt, jpjeft, npckge
46	INTEGER, DIMENSION(jp_nseg) :: jpiwob, jpjwdt, jpjwft, npckgw
47	INTEGER, DIMENSION(jp_nseg) :: jpjnob, jpindt, jpinft, npckgn
48	INTEGER, DIMENSION(jp_nseg) :: jpjsob, jpisdt, jpisft, npckgs
49	!!----------------------------------------------------------------------
50	!! NEMO/OPA 4.0 , NEMO Consortium (2011)
51	!! $Id$
52	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
53	!!----------------------------------------------------------------------
54	CONTAINS
55
56	SUBROUTINE bdy_init
57	!!----------------------------------------------------------------------
58	!! * ROUTINE bdy_init *
59	!!
60	!! ** Purpose : Initialization of the dynamics and tracer fields with
61	!! unstructured open boundaries.
62	!!
63	!! ** Method : Read initialization arrays (mask, indices) to identify
64	!! an unstructured open boundary
65	!!
66	!! ** Input : bdy_init.nc, input file for unstructured open boundaries
67	!!----------------------------------------------------------------------
68	! namelist variables
69	!-------------------
70	CHARACTER(LEN=80),DIMENSION(jpbgrd) :: clfile
71	CHARACTER(LEN=1) :: ctypebdy
72	INTEGER :: nbdyind, nbdybeg, nbdyend
73
74	! local variables
75	!-------------------
76	INTEGER :: ib_bdy, ii, ij, ik, igrd, ib, ir, iseg ! dummy loop indices
77	INTEGER :: icount, icountr, ibr_max, ilen1, ibm1 ! local integers
78	INTEGER :: iwe, ies, iso, ino, inum, id_dummy ! - -
79	INTEGER :: igrd_start, igrd_end, jpbdta ! - -
80	INTEGER :: jpbdtau, jpbdtas ! - -
81	INTEGER :: ib_bdy1, ib_bdy2, ib1, ib2 ! - -
82	INTEGER :: i_offset, j_offset ! - -
83	INTEGER, POINTER :: nbi, nbj, nbr ! short cuts
84	REAL(wp), POINTER :: flagu, flagv ! - -
85	REAL(wp), POINTER, DIMENSION(:,:) :: pmask ! pointer to 2D mask fields
86	REAL(wp) :: zefl, zwfl, znfl, zsfl ! local scalars
87	INTEGER, DIMENSION (2) :: kdimsz
88	INTEGER, DIMENSION(jpbgrd,jp_bdy) :: nblendta ! Length of index arrays
89	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbidta, nbjdta ! Index arrays: i and j indices of bdy dta
90	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbrdta ! Discrete distance from rim points
91	CHARACTER(LEN=1),DIMENSION(jpbgrd) :: cgrid
92	INTEGER :: com_east, com_west, com_south, com_north ! Flags for boundaries sending
93	INTEGER :: com_east_b, com_west_b, com_south_b, com_north_b ! Flags for boundaries receiving
94	INTEGER :: iw_b(4), ie_b(4), is_b(4), in_b(4) ! Arrays for neighbours coordinates
95	REAL(wp), POINTER, DIMENSION(:,:) :: zfmask ! temporary fmask array excluding coastal boundary condition (shlat)
96
97	!!
98	NAMELIST/nambdy/ nb_bdy, ln_coords_file, cn_coords_file, &
99	& ln_mask_file, cn_mask_file, cn_dyn2d, nn_dyn2d_dta, &
100	& cn_dyn3d, nn_dyn3d_dta, cn_tra, nn_tra_dta, &
101	& ln_tra_dmp, ln_dyn3d_dmp, rn_time_dmp, rn_time_dmp_out, &
102	& cn_ice_lim, nn_ice_lim_dta, &
103	& rn_ice_tem, rn_ice_sal, rn_ice_age, &
104	& ln_vol, nn_volctl, nn_rimwidth, nb_jpk_bdy
105	!!
106	NAMELIST/nambdy_index/ ctypebdy, nbdyind, nbdybeg, nbdyend
107	INTEGER :: ios ! Local integer output status for namelist read
108	!!----------------------------------------------------------------------
109
110	IF( nn_timing == 1 ) CALL timing_start('bdy_init')
111
112	IF(lwp) WRITE(numout,*)
113	IF(lwp) WRITE(numout,*) 'bdy_init : initialization of open boundaries'
114	IF(lwp) WRITE(numout,*) '~~~~~~~~'
115	!
116
117	IF( jperio /= 0 ) CALL ctl_stop( 'Cyclic or symmetric,', &
118	& ' and general open boundary condition are not compatible' )
119
120	cgrid= (/'t','u','v'/)
121
122	! ------------------------
123	! Read namelist parameters
124	! ------------------------
125
126	REWIND( numnam_ref ) ! Namelist nambdy in reference namelist :Unstructured open boundaries
127	READ ( numnam_ref, nambdy, IOSTAT = ios, ERR = 901)
128	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in reference namelist', lwp )
129
130	REWIND( numnam_cfg ) ! Namelist nambdy in configuration namelist :Unstructured open boundaries
131	READ ( numnam_cfg, nambdy, IOSTAT = ios, ERR = 902 )
132	902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in configuration namelist', lwp )
133	IF(lwm) WRITE ( numond, nambdy )
134
135	! -----------------------------------------
136	! Check and write out namelist parameters
137	! -----------------------------------------
138	! ! control prints
139	IF(lwp) WRITE(numout,*) ' nambdy'
140
141	IF( nb_bdy .eq. 0 ) THEN
142	IF(lwp) WRITE(numout,*) 'nb_bdy = 0, NO OPEN BOUNDARIES APPLIED.'
143	ELSE
144	IF(lwp) WRITE(numout,*) 'Number of open boundary sets : ',nb_bdy
145	ENDIF
146
147	DO ib_bdy = 1,nb_bdy
148	IF(lwp) WRITE(numout,*) ' '
149	IF(lwp) WRITE(numout,*) '------ Open boundary data set ',ib_bdy,'------'
150
151	IF( ln_coords_file(ib_bdy) ) THEN
152	IF(lwp) WRITE(numout,*) 'Boundary definition read from file '//TRIM(cn_coords_file(ib_bdy))
153	ELSE
154	IF(lwp) WRITE(numout,*) 'Boundary defined in namelist.'
155	ENDIF
156	IF(lwp) WRITE(numout,*)
157
158	IF(lwp) WRITE(numout,*) 'Boundary conditions for barotropic solution: '
159	SELECT CASE( cn_dyn2d(ib_bdy) )
160	CASE('none')
161	IF(lwp) WRITE(numout,*) ' no open boundary condition'
162	dta_bdy(ib_bdy)%ll_ssh = .false.
163	dta_bdy(ib_bdy)%ll_u2d = .false.
164	dta_bdy(ib_bdy)%ll_v2d = .false.
165	CASE('frs')
166	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
167	dta_bdy(ib_bdy)%ll_ssh = .false.
168	dta_bdy(ib_bdy)%ll_u2d = .true.
169	dta_bdy(ib_bdy)%ll_v2d = .true.
170	CASE('flather')
171	IF(lwp) WRITE(numout,*) ' Flather radiation condition'
172	dta_bdy(ib_bdy)%ll_ssh = .true.
173	dta_bdy(ib_bdy)%ll_u2d = .true.
174	dta_bdy(ib_bdy)%ll_v2d = .true.
175	CASE('orlanski')
176	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
177	dta_bdy(ib_bdy)%ll_ssh = .false.
178	dta_bdy(ib_bdy)%ll_u2d = .true.
179	dta_bdy(ib_bdy)%ll_v2d = .true.
180	CASE('orlanski_npo')
181	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
182	dta_bdy(ib_bdy)%ll_ssh = .false.
183	dta_bdy(ib_bdy)%ll_u2d = .true.
184	dta_bdy(ib_bdy)%ll_v2d = .true.
185	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn2d' )
186	END SELECT
187	IF( cn_dyn2d(ib_bdy) /= 'none' ) THEN
188	SELECT CASE( nn_dyn2d_dta(ib_bdy) ) !
189	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
190	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
191	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' tidal harmonic forcing taken from file'
192	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' boundary data AND tidal harmonic forcing taken from files'
193	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn2d_dta must be between 0 and 3' )
194	END SELECT
195	IF (( nn_dyn2d_dta(ib_bdy) .ge. 2 ).AND.(.NOT.lk_tide)) THEN
196	CALL ctl_stop( 'You must activate key_tide to add tidal forcing at open boundaries' )
197	ENDIF
198	ENDIF
199	IF(lwp) WRITE(numout,*)
200
201	IF(lwp) WRITE(numout,*) 'Boundary conditions for baroclinic velocities: '
202	SELECT CASE( cn_dyn3d(ib_bdy) )
203	CASE('none')
204	IF(lwp) WRITE(numout,*) ' no open boundary condition'
205	dta_bdy(ib_bdy)%ll_u3d = .false.
206	dta_bdy(ib_bdy)%ll_v3d = .false.
207	CASE('frs')
208	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
209	dta_bdy(ib_bdy)%ll_u3d = .true.
210	dta_bdy(ib_bdy)%ll_v3d = .true.
211	CASE('specified')
212	IF(lwp) WRITE(numout,*) ' Specified value'
213	dta_bdy(ib_bdy)%ll_u3d = .true.
214	dta_bdy(ib_bdy)%ll_v3d = .true.
215	CASE('zero')
216	IF(lwp) WRITE(numout,*) ' Zero baroclinic velocities (runoff case)'
217	dta_bdy(ib_bdy)%ll_u3d = .false.
218	dta_bdy(ib_bdy)%ll_v3d = .false.
219	CASE('orlanski')
220	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
221	dta_bdy(ib_bdy)%ll_u3d = .true.
222	dta_bdy(ib_bdy)%ll_v3d = .true.
223	CASE('orlanski_npo')
224	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
225	dta_bdy(ib_bdy)%ll_u3d = .true.
226	dta_bdy(ib_bdy)%ll_v3d = .true.
227	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn3d' )
228	END SELECT
229	IF( cn_dyn3d(ib_bdy) /= 'none' ) THEN
230	SELECT CASE( nn_dyn3d_dta(ib_bdy) ) !
231	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
232	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
233	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn3d_dta must be 0 or 1' )
234	END SELECT
235	ENDIF
236
237	IF ( ln_dyn3d_dmp(ib_bdy) ) THEN
238	IF ( cn_dyn3d(ib_bdy) == 'none' ) THEN
239	IF(lwp) WRITE(numout,*) 'No open boundary condition for baroclinic velocities: ln_dyn3d_dmp is set to .false.'
240	ln_dyn3d_dmp(ib_bdy)=.false.
241	ELSEIF ( cn_dyn3d(ib_bdy) == 'frs' ) THEN
242	CALL ctl_stop( 'Use FRS OR relaxation' )
243	ELSE
244	IF(lwp) WRITE(numout,*) ' + baroclinic velocities relaxation zone'
245	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
246	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
247	dta_bdy(ib_bdy)%ll_u3d = .true.
248	dta_bdy(ib_bdy)%ll_v3d = .true.
249	ENDIF
250	ELSE
251	IF(lwp) WRITE(numout,*) ' NO relaxation on baroclinic velocities'
252	ENDIF
253	IF(lwp) WRITE(numout,*)
254
255	IF(lwp) WRITE(numout,*) 'Boundary conditions for temperature and salinity: '
256	SELECT CASE( cn_tra(ib_bdy) )
257	CASE('none')
258	IF(lwp) WRITE(numout,*) ' no open boundary condition'
259	dta_bdy(ib_bdy)%ll_tem = .false.
260	dta_bdy(ib_bdy)%ll_sal = .false.
261	CASE('frs')
262	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
263	dta_bdy(ib_bdy)%ll_tem = .true.
264	dta_bdy(ib_bdy)%ll_sal = .true.
265	CASE('specified')
266	IF(lwp) WRITE(numout,*) ' Specified value'
267	dta_bdy(ib_bdy)%ll_tem = .true.
268	dta_bdy(ib_bdy)%ll_sal = .true.
269	CASE('neumann')
270	IF(lwp) WRITE(numout,*) ' Neumann conditions'
271	dta_bdy(ib_bdy)%ll_tem = .false.
272	dta_bdy(ib_bdy)%ll_sal = .false.
273	CASE('runoff')
274	IF(lwp) WRITE(numout,*) ' Runoff conditions : Neumann for T and specified to 0.1 for salinity'
275	dta_bdy(ib_bdy)%ll_tem = .false.
276	dta_bdy(ib_bdy)%ll_sal = .false.
277	CASE('orlanski')
278	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
279	dta_bdy(ib_bdy)%ll_tem = .true.
280	dta_bdy(ib_bdy)%ll_sal = .true.
281	CASE('orlanski_npo')
282	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
283	dta_bdy(ib_bdy)%ll_tem = .true.
284	dta_bdy(ib_bdy)%ll_sal = .true.
285	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_tra' )
286	END SELECT
287	IF( cn_tra(ib_bdy) /= 'none' ) THEN
288	SELECT CASE( nn_tra_dta(ib_bdy) ) !
289	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
290	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
291	CASE DEFAULT ; CALL ctl_stop( 'nn_tra_dta must be 0 or 1' )
292	END SELECT
293	ENDIF
294
295	IF ( ln_tra_dmp(ib_bdy) ) THEN
296	IF ( cn_tra(ib_bdy) == 'none' ) THEN
297	IF(lwp) WRITE(numout,*) 'No open boundary condition for tracers: ln_tra_dmp is set to .false.'
298	ln_tra_dmp(ib_bdy)=.false.
299	ELSEIF ( cn_tra(ib_bdy) == 'frs' ) THEN
300	CALL ctl_stop( 'Use FRS OR relaxation' )
301	ELSE
302	IF(lwp) WRITE(numout,*) ' + T/S relaxation zone'
303	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
304	IF(lwp) WRITE(numout,*) ' Outflow damping time scale: ',rn_time_dmp_out(ib_bdy),' days'
305	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
306	dta_bdy(ib_bdy)%ll_tem = .true.
307	dta_bdy(ib_bdy)%ll_sal = .true.
308	ENDIF
309	ELSE
310	IF(lwp) WRITE(numout,*) ' NO T/S relaxation'
311	ENDIF
312	IF(lwp) WRITE(numout,*)
313
314	#if defined key_lim2
315	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
316	SELECT CASE( cn_ice_lim(ib_bdy) )
317	CASE('none')
318	IF(lwp) WRITE(numout,*) ' no open boundary condition'
319	dta_bdy(ib_bdy)%ll_frld = .false.
320	dta_bdy(ib_bdy)%ll_hicif = .false.
321	dta_bdy(ib_bdy)%ll_hsnif = .false.
322	CASE('frs')
323	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
324	dta_bdy(ib_bdy)%ll_frld = .true.
325	dta_bdy(ib_bdy)%ll_hicif = .true.
326	dta_bdy(ib_bdy)%ll_hsnif = .true.
327	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_ice_lim' )
328	END SELECT
329	IF( cn_ice_lim(ib_bdy) /= 'none' ) THEN
330	SELECT CASE( nn_ice_lim_dta(ib_bdy) ) !
331	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
332	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
333	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_lim_dta must be 0 or 1' )
334	END SELECT
335	ENDIF
336	IF(lwp) WRITE(numout,*)
337	#elif defined key_lim3
338	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
339	SELECT CASE( cn_ice_lim(ib_bdy) )
340	CASE('none')
341	IF(lwp) WRITE(numout,*) ' no open boundary condition'
342	dta_bdy(ib_bdy)%ll_a_i = .false.
343	dta_bdy(ib_bdy)%ll_ht_i = .false.
344	dta_bdy(ib_bdy)%ll_ht_s = .false.
345	CASE('frs')
346	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
347	dta_bdy(ib_bdy)%ll_a_i = .true.
348	dta_bdy(ib_bdy)%ll_ht_i = .true.
349	dta_bdy(ib_bdy)%ll_ht_s = .true.
350	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_ice_lim' )
351	END SELECT
352	IF( cn_ice_lim(ib_bdy) /= 'none' ) THEN
353	SELECT CASE( nn_ice_lim_dta(ib_bdy) ) !
354	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
355	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
356	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_lim_dta must be 0 or 1' )
357	END SELECT
358	ENDIF
359	IF(lwp) WRITE(numout,*)
360	IF(lwp) WRITE(numout,*) ' tem of bdy sea-ice = ', rn_ice_tem(ib_bdy)
361	IF(lwp) WRITE(numout,*) ' sal of bdy sea-ice = ', rn_ice_sal(ib_bdy)
362	IF(lwp) WRITE(numout,*) ' age of bdy sea-ice = ', rn_ice_age(ib_bdy)
363	#endif
364
365	IF(lwp) WRITE(numout,*) ' Width of relaxation zone = ', nn_rimwidth(ib_bdy)
366	IF(lwp) WRITE(numout,*)
367
368	ENDDO
369
370	IF (nb_bdy .gt. 0) THEN
371	IF( ln_vol ) THEN ! check volume conservation (nn_volctl value)
372	IF(lwp) WRITE(numout,*) 'Volume correction applied at open boundaries'
373	IF(lwp) WRITE(numout,*)
374	SELECT CASE ( nn_volctl )
375	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' The total volume will be constant'
376	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' The total volume will vary according to the surface E-P flux'
377	CASE DEFAULT ; CALL ctl_stop( 'nn_volctl must be 0 or 1' )
378	END SELECT
379	IF(lwp) WRITE(numout,*)
380	ELSE
381	IF(lwp) WRITE(numout,*) 'No volume correction applied at open boundaries'
382	IF(lwp) WRITE(numout,*)
383	ENDIF
384	IF( nb_jpk_bdy > 0 ) THEN
385	IF(lwp) WRITE(numout,) ' open boundary will be interpolate in the vertical onto the native grid *'
386	ELSE
387	IF(lwp) WRITE(numout,) ' open boundary will be read straight onto the native grid without vertical interpolation *'
388	ENDIF
389	ENDIF
390
391	! -------------------------------------------------
392	! Initialise indices arrays for open boundaries
393	! -------------------------------------------------
394
395	! Work out global dimensions of boundary data
396	! ---------------------------------------------
397	REWIND( numnam_cfg )
398
399	!!----------------------------------------------------------------------
400
401
402
403	nblendta(:,:) = 0
404	nbdysege = 0
405	nbdysegw = 0
406	nbdysegn = 0
407	nbdysegs = 0
408	icount = 0 ! count user defined segments
409	! Dimensions below are used to allocate arrays to read external data
410	jpbdtas = 1 ! Maximum size of boundary data (structured case)
411	jpbdtau = 1 ! Maximum size of boundary data (unstructured case)
412
413	DO ib_bdy = 1, nb_bdy
414
415	IF( .NOT. ln_coords_file(ib_bdy) ) THEN ! Work out size of global arrays from namelist parameters
416
417	icount = icount + 1
418	! No REWIND here because may need to read more than one nambdy_index namelist.
419	! Read only namelist_cfg to avoid unseccessfull overwrite
420	!! REWIND( numnam_ref ) ! Namelist nambdy_index in reference namelist : Open boundaries indexes
421	!! READ ( numnam_ref, namrun, IOSTAT = ios, ERR = 903)
422	!!903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in reference namelist', lwp )
423
424	!! REWIND( numnam_cfg ) ! Namelist nambdy_index in configuration namelist : Open boundaries indexes
425	READ ( numnam_cfg, nambdy_index, IOSTAT = ios, ERR = 904 )
426	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in configuration namelist', lwp )
427	IF(lwm) WRITE ( numond, nambdy_index )
428
429	SELECT CASE ( TRIM(ctypebdy) )
430	CASE( 'N' )
431	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
432	nbdyind = jpjglo - 2 ! set boundary to whole side of model domain.
433	nbdybeg = 2
434	nbdyend = jpiglo - 1
435	ENDIF
436	nbdysegn = nbdysegn + 1
437	npckgn(nbdysegn) = ib_bdy ! Save bdy package number
438	jpjnob(nbdysegn) = nbdyind
439	jpindt(nbdysegn) = nbdybeg
440	jpinft(nbdysegn) = nbdyend
441	!
442	CASE( 'S' )
443	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
444	nbdyind = 2 ! set boundary to whole side of model domain.
445	nbdybeg = 2
446	nbdyend = jpiglo - 1
447	ENDIF
448	nbdysegs = nbdysegs + 1
449	npckgs(nbdysegs) = ib_bdy ! Save bdy package number
450	jpjsob(nbdysegs) = nbdyind
451	jpisdt(nbdysegs) = nbdybeg
452	jpisft(nbdysegs) = nbdyend
453	!
454	CASE( 'E' )
455	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
456	nbdyind = jpiglo - 2 ! set boundary to whole side of model domain.
457	nbdybeg = 2
458	nbdyend = jpjglo - 1
459	ENDIF
460	nbdysege = nbdysege + 1
461	npckge(nbdysege) = ib_bdy ! Save bdy package number
462	jpieob(nbdysege) = nbdyind
463	jpjedt(nbdysege) = nbdybeg
464	jpjeft(nbdysege) = nbdyend
465	!
466	CASE( 'W' )
467	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
468	nbdyind = 2 ! set boundary to whole side of model domain.
469	nbdybeg = 2
470	nbdyend = jpjglo - 1
471	ENDIF
472	nbdysegw = nbdysegw + 1
473	npckgw(nbdysegw) = ib_bdy ! Save bdy package number
474	jpiwob(nbdysegw) = nbdyind
475	jpjwdt(nbdysegw) = nbdybeg
476	jpjwft(nbdysegw) = nbdyend
477	!
478	CASE DEFAULT ; CALL ctl_stop( 'ctypebdy must be N, S, E or W' )
479	END SELECT
480
481	! For simplicity we assume that in case of straight bdy, arrays have the same length
482	! (even if it is true that last tangential velocity points
483	! are useless). This simplifies a little bit boundary data format (and agrees with format
484	! used so far in obc package)
485
486	nblendta(1:jpbgrd,ib_bdy) = (nbdyend - nbdybeg + 1) * nn_rimwidth(ib_bdy)
487	jpbdtas = MAX(jpbdtas, (nbdyend - nbdybeg + 1))
488	IF (lwp.and.(nn_rimwidth(ib_bdy)>nrimmax)) &
489	& CALL ctl_stop( 'rimwidth must be lower than nrimmax' )
490
491	ELSE ! Read size of arrays in boundary coordinates file.
492	CALL iom_open( cn_coords_file(ib_bdy), inum )
493	DO igrd = 1, jpbgrd
494	id_dummy = iom_varid( inum, 'nbi'//cgrid(igrd), kdimsz=kdimsz )
495	!clem nblendta(igrd,ib_bdy) = kdimsz(1)
496	!clem jpbdtau = MAX(jpbdtau, kdimsz(1))
497	nblendta(igrd,ib_bdy) = MAXVAL(kdimsz)
498	jpbdtau = MAX(jpbdtau, MAXVAL(kdimsz))
499	ENDDO
500	CALL iom_close( inum )
501
502	ENDIF
503
504	ENDDO ! ib_bdy
505
506	IF (nb_bdy>0) THEN
507	jpbdta = MAXVAL(nblendta(1:jpbgrd,1:nb_bdy))
508
509	! Allocate arrays
510	!---------------
511	ALLOCATE( nbidta(jpbdta, jpbgrd, nb_bdy), nbjdta(jpbdta, jpbgrd, nb_bdy), &
512	& nbrdta(jpbdta, jpbgrd, nb_bdy) )
513
514	IF( nb_jpk_bdy>0 ) THEN
515	ALLOCATE( dta_global(jpbdtau, 1, nb_jpk_bdy) )
516	ALLOCATE( dta_global_z(jpbdtau, 1, nb_jpk_bdy) )
517	ALLOCATE( dta_global_dz(jpbdtau, 1, nb_jpk_bdy) )
518	ELSE
519	ALLOCATE( dta_global(jpbdtau, 1, jpk) )
520	ALLOCATE( dta_global_z(jpbdtau, 1, jpk) ) ! needed ?? TODO
521	ALLOCATE( dta_global_dz(jpbdtau, 1, jpk) )! needed ?? TODO
522	ENDIF
523
524	IF ( icount>0 ) THEN
525	IF( nb_jpk_bdy>0 ) THEN
526	ALLOCATE( dta_global2(jpbdtas, nrimmax, nb_jpk_bdy) )
527	ALLOCATE( dta_global2_z(jpbdtas, nrimmax, nb_jpk_bdy) )
528	ALLOCATE( dta_global2_dz(jpbdtas, nrimmax, nb_jpk_bdy) )
529	ELSE
530	ALLOCATE( dta_global2(jpbdtas, nrimmax, jpk) )
531	ALLOCATE( dta_global2_z(jpbdtas, nrimmax, jpk) ) ! needed ?? TODO
532	ALLOCATE( dta_global2_dz(jpbdtas, nrimmax, jpk) )! needed ?? TODO
533	ENDIF
534	ENDIF
535	!
536	ENDIF
537
538	! Now look for crossings in user (namelist) defined open boundary segments:
539	!--------------------------------------------------------------------------
540	IF ( icount>0 ) CALL bdy_ctl_seg
541
542	! Calculate global boundary index arrays or read in from file
543	!------------------------------------------------------------
544	! 1. Read global index arrays from boundary coordinates file.
545	DO ib_bdy = 1, nb_bdy
546
547	IF( ln_coords_file(ib_bdy) ) THEN
548
549	CALL iom_open( cn_coords_file(ib_bdy), inum )
550	DO igrd = 1, jpbgrd
551	CALL iom_get( inum, jpdom_unknown, 'nbi'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
552	DO ii = 1,nblendta(igrd,ib_bdy)
553	nbidta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
554	END DO
555	CALL iom_get( inum, jpdom_unknown, 'nbj'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
556	DO ii = 1,nblendta(igrd,ib_bdy)
557	nbjdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
558	END DO
559	CALL iom_get( inum, jpdom_unknown, 'nbr'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
560	DO ii = 1,nblendta(igrd,ib_bdy)
561	nbrdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
562	END DO
563
564	ibr_max = MAXVAL( nbrdta(:,igrd,ib_bdy) )
565	IF(lwp) WRITE(numout,*)
566	IF(lwp) WRITE(numout,*) ' Maximum rimwidth in file is ', ibr_max
567	IF(lwp) WRITE(numout,*) ' nn_rimwidth from namelist is ', nn_rimwidth(ib_bdy)
568	IF (ibr_max < nn_rimwidth(ib_bdy)) &
569	CALL ctl_stop( 'nn_rimwidth is larger than maximum rimwidth in file',cn_coords_file(ib_bdy) )
570	END DO
571	CALL iom_close( inum )
572
573	ENDIF
574
575	ENDDO
576
577	! 2. Now fill indices corresponding to straight open boundary arrays:
578	! East
579	!-----
580	DO iseg = 1, nbdysege
581	ib_bdy = npckge(iseg)
582	!
583	! ------------ T points -------------
584	igrd=1
585	icount=0
586	DO ir = 1, nn_rimwidth(ib_bdy)
587	DO ij = jpjedt(iseg), jpjeft(iseg)
588	icount = icount + 1
589	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
590	nbjdta(icount, igrd, ib_bdy) = ij
591	nbrdta(icount, igrd, ib_bdy) = ir
592	ENDDO
593	ENDDO
594	!
595	! ------------ U points -------------
596	igrd=2
597	icount=0
598	DO ir = 1, nn_rimwidth(ib_bdy)
599	DO ij = jpjedt(iseg), jpjeft(iseg)
600	icount = icount + 1
601	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 1 - ir
602	nbjdta(icount, igrd, ib_bdy) = ij
603	nbrdta(icount, igrd, ib_bdy) = ir
604	ENDDO
605	ENDDO
606	!
607	! ------------ V points -------------
608	igrd=3
609	icount=0
610	DO ir = 1, nn_rimwidth(ib_bdy)
611	! DO ij = jpjedt(iseg), jpjeft(iseg) - 1
612	DO ij = jpjedt(iseg), jpjeft(iseg)
613	icount = icount + 1
614	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
615	nbjdta(icount, igrd, ib_bdy) = ij
616	nbrdta(icount, igrd, ib_bdy) = ir
617	ENDDO
618	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
619	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
620	ENDDO
621	ENDDO
622	!
623	! West
624	!-----
625	DO iseg = 1, nbdysegw
626	ib_bdy = npckgw(iseg)
627	!
628	! ------------ T points -------------
629	igrd=1
630	icount=0
631	DO ir = 1, nn_rimwidth(ib_bdy)
632	DO ij = jpjwdt(iseg), jpjwft(iseg)
633	icount = icount + 1
634	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
635	nbjdta(icount, igrd, ib_bdy) = ij
636	nbrdta(icount, igrd, ib_bdy) = ir
637	ENDDO
638	ENDDO
639	!
640	! ------------ U points -------------
641	igrd=2
642	icount=0
643	DO ir = 1, nn_rimwidth(ib_bdy)
644	DO ij = jpjwdt(iseg), jpjwft(iseg)
645	icount = icount + 1
646	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
647	nbjdta(icount, igrd, ib_bdy) = ij
648	nbrdta(icount, igrd, ib_bdy) = ir
649	ENDDO
650	ENDDO
651	!
652	! ------------ V points -------------
653	igrd=3
654	icount=0
655	DO ir = 1, nn_rimwidth(ib_bdy)
656	! DO ij = jpjwdt(iseg), jpjwft(iseg) - 1
657	DO ij = jpjwdt(iseg), jpjwft(iseg)
658	icount = icount + 1
659	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
660	nbjdta(icount, igrd, ib_bdy) = ij
661	nbrdta(icount, igrd, ib_bdy) = ir
662	ENDDO
663	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
664	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
665	ENDDO
666	ENDDO
667	!
668	! North
669	!-----
670	DO iseg = 1, nbdysegn
671	ib_bdy = npckgn(iseg)
672	!
673	! ------------ T points -------------
674	igrd=1
675	icount=0
676	DO ir = 1, nn_rimwidth(ib_bdy)
677	DO ii = jpindt(iseg), jpinft(iseg)
678	icount = icount + 1
679	nbidta(icount, igrd, ib_bdy) = ii
680	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
681	nbrdta(icount, igrd, ib_bdy) = ir
682	ENDDO
683	ENDDO
684	!
685	! ------------ U points -------------
686	igrd=2
687	icount=0
688	DO ir = 1, nn_rimwidth(ib_bdy)
689	! DO ii = jpindt(iseg), jpinft(iseg) - 1
690	DO ii = jpindt(iseg), jpinft(iseg)
691	icount = icount + 1
692	nbidta(icount, igrd, ib_bdy) = ii
693	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
694	nbrdta(icount, igrd, ib_bdy) = ir
695	ENDDO
696	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
697	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
698	ENDDO
699	!
700	! ------------ V points -------------
701	igrd=3
702	icount=0
703	DO ir = 1, nn_rimwidth(ib_bdy)
704	DO ii = jpindt(iseg), jpinft(iseg)
705	icount = icount + 1
706	nbidta(icount, igrd, ib_bdy) = ii
707	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 1 - ir
708	nbrdta(icount, igrd, ib_bdy) = ir
709	ENDDO
710	ENDDO
711	ENDDO
712	!
713	! South
714	!-----
715	DO iseg = 1, nbdysegs
716	ib_bdy = npckgs(iseg)
717	!
718	! ------------ T points -------------
719	igrd=1
720	icount=0
721	DO ir = 1, nn_rimwidth(ib_bdy)
722	DO ii = jpisdt(iseg), jpisft(iseg)
723	icount = icount + 1
724	nbidta(icount, igrd, ib_bdy) = ii
725	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
726	nbrdta(icount, igrd, ib_bdy) = ir
727	ENDDO
728	ENDDO
729	!
730	! ------------ U points -------------
731	igrd=2
732	icount=0
733	DO ir = 1, nn_rimwidth(ib_bdy)
734	! DO ii = jpisdt(iseg), jpisft(iseg) - 1
735	DO ii = jpisdt(iseg), jpisft(iseg)
736	icount = icount + 1
737	nbidta(icount, igrd, ib_bdy) = ii
738	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
739	nbrdta(icount, igrd, ib_bdy) = ir
740	ENDDO
741	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
742	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
743	ENDDO
744	!
745	! ------------ V points -------------
746	igrd=3
747	icount=0
748	DO ir = 1, nn_rimwidth(ib_bdy)
749	DO ii = jpisdt(iseg), jpisft(iseg)
750	icount = icount + 1
751	nbidta(icount, igrd, ib_bdy) = ii
752	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
753	nbrdta(icount, igrd, ib_bdy) = ir
754	ENDDO
755	ENDDO
756	ENDDO
757
758	! Deal with duplicated points
759	!-----------------------------
760	! We assign negative indices to duplicated points (to remove them from bdy points to be updated)
761	! if their distance to the bdy is greater than the other
762	! If their distance are the same, just keep only one to avoid updating a point twice
763	DO igrd = 1, jpbgrd
764	DO ib_bdy1 = 1, nb_bdy
765	DO ib_bdy2 = 1, nb_bdy
766	IF (ib_bdy1/=ib_bdy2) THEN
767	DO ib1 = 1, nblendta(igrd,ib_bdy1)
768	DO ib2 = 1, nblendta(igrd,ib_bdy2)
769	IF ((nbidta(ib1, igrd, ib_bdy1)==nbidta(ib2, igrd, ib_bdy2)).AND. &
770	& (nbjdta(ib1, igrd, ib_bdy1)==nbjdta(ib2, igrd, ib_bdy2))) THEN
771	! IF ((lwp).AND.(igrd==1)) WRITE(numout,*) ' found coincident point ji, jj:', &
772	! & nbidta(ib1, igrd, ib_bdy1), &
773	! & nbjdta(ib2, igrd, ib_bdy2)
774	! keep only points with the lowest distance to boundary:
775	IF (nbrdta(ib1, igrd, ib_bdy1)<nbrdta(ib2, igrd, ib_bdy2)) THEN
776	nbidta(ib2, igrd, ib_bdy2) =-ib_bdy2
777	nbjdta(ib2, igrd, ib_bdy2) =-ib_bdy2
778	ELSEIF (nbrdta(ib1, igrd, ib_bdy1)>nbrdta(ib2, igrd, ib_bdy2)) THEN
779	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
780	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
781	! Arbitrary choice if distances are the same:
782	ELSE
783	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
784	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
785	ENDIF
786	END IF
787	END DO
788	END DO
789	ENDIF
790	END DO
791	END DO
792	END DO
793
794	! Work out dimensions of boundary data on each processor
795	! ------------------------------------------------------
796
797	! Rather assume that boundary data indices are given on global domain
798	! TO BE DISCUSSED ?
799	! iw = mig(1) + 1 ! if monotasking and no zoom, iw=2
800	! ie = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
801	! is = mjg(1) + 1 ! if monotasking and no zoom, is=2
802	! in = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
803	iwe = mig(1) - jpizoom + 2 ! if monotasking and no zoom, iw=2
804	ies = mig(1) + nlci - jpizoom - 1 ! if monotasking and no zoom, ie=jpim1
805	iso = mjg(1) - jpjzoom + 2 ! if monotasking and no zoom, is=2
806	ino = mjg(1) + nlcj - jpjzoom - 1 ! if monotasking and no zoom, in=jpjm1
807
808	ALLOCATE( nbondi_bdy(nb_bdy))
809	ALLOCATE( nbondj_bdy(nb_bdy))
810	nbondi_bdy(:)=2
811	nbondj_bdy(:)=2
812	ALLOCATE( nbondi_bdy_b(nb_bdy))
813	ALLOCATE( nbondj_bdy_b(nb_bdy))
814	nbondi_bdy_b(:)=2
815	nbondj_bdy_b(:)=2
816
817	! Work out dimensions of boundary data on each neighbour process
818	IF(nbondi .eq. 0) THEN
819	iw_b(1) = jpizoom + nimppt(nowe+1)
820	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
821	is_b(1) = jpjzoom + njmppt(nowe+1)
822	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
823
824	iw_b(2) = jpizoom + nimppt(noea+1)
825	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
826	is_b(2) = jpjzoom + njmppt(noea+1)
827	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
828	ELSEIF(nbondi .eq. 1) THEN
829	iw_b(1) = jpizoom + nimppt(nowe+1)
830	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
831	is_b(1) = jpjzoom + njmppt(nowe+1)
832	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
833	ELSEIF(nbondi .eq. -1) THEN
834	iw_b(2) = jpizoom + nimppt(noea+1)
835	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
836	is_b(2) = jpjzoom + njmppt(noea+1)
837	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
838	ENDIF
839
840	IF(nbondj .eq. 0) THEN
841	iw_b(3) = jpizoom + nimppt(noso+1)
842	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
843	is_b(3) = jpjzoom + njmppt(noso+1)
844	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
845
846	iw_b(4) = jpizoom + nimppt(nono+1)
847	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
848	is_b(4) = jpjzoom + njmppt(nono+1)
849	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
850	ELSEIF(nbondj .eq. 1) THEN
851	iw_b(3) = jpizoom + nimppt(noso+1)
852	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
853	is_b(3) = jpjzoom + njmppt(noso+1)
854	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
855	ELSEIF(nbondj .eq. -1) THEN
856	iw_b(4) = jpizoom + nimppt(nono+1)
857	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
858	is_b(4) = jpjzoom + njmppt(nono+1)
859	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
860	ENDIF
861
862	DO ib_bdy = 1, nb_bdy
863	DO igrd = 1, jpbgrd
864	icount = 0
865	icountr = 0
866	idx_bdy(ib_bdy)%nblen(igrd) = 0
867	idx_bdy(ib_bdy)%nblenrim(igrd) = 0
868	DO ib = 1, nblendta(igrd,ib_bdy)
869	! check that data is in correct order in file
870	ibm1 = MAX(1,ib-1)
871	IF(lwp) THEN ! Since all procs read global data only need to do this check on one proc...
872	IF( nbrdta(ib,igrd,ib_bdy) < nbrdta(ibm1,igrd,ib_bdy) ) THEN
873	CALL ctl_stop('bdy_init : ERROR : boundary data in file must be defined ', &
874	& ' in order of distance from edge nbr A utility for re-ordering ', &
875	& ' boundary coordinates and data files exists in the TOOLS/OBC directory')
876	ENDIF
877	ENDIF
878	! check if point is in local domain
879	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
880	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino ) THEN
881	!
882	icount = icount + 1
883	!
884	IF( nbrdta(ib,igrd,ib_bdy) == 1 ) icountr = icountr+1
885	ENDIF
886	ENDDO
887	idx_bdy(ib_bdy)%nblenrim(igrd) = icountr !: length of rim boundary data on each proc
888	idx_bdy(ib_bdy)%nblen (igrd) = icount !: length of boundary data on each proc
889	ENDDO ! igrd
890
891	! Allocate index arrays for this boundary set
892	!--------------------------------------------
893	ilen1 = MAXVAL(idx_bdy(ib_bdy)%nblen(:))
894	ALLOCATE( idx_bdy(ib_bdy)%nbi(ilen1,jpbgrd) )
895	ALLOCATE( idx_bdy(ib_bdy)%nbj(ilen1,jpbgrd) )
896	ALLOCATE( idx_bdy(ib_bdy)%nbr(ilen1,jpbgrd) )
897	ALLOCATE( idx_bdy(ib_bdy)%nbd(ilen1,jpbgrd) )
898	ALLOCATE( idx_bdy(ib_bdy)%nbdout(ilen1,jpbgrd) )
899	ALLOCATE( idx_bdy(ib_bdy)%nbmap(ilen1,jpbgrd) )
900	ALLOCATE( idx_bdy(ib_bdy)%nbw(ilen1,jpbgrd) )
901	ALLOCATE( idx_bdy(ib_bdy)%flagu(ilen1,jpbgrd) )
902	ALLOCATE( idx_bdy(ib_bdy)%flagv(ilen1,jpbgrd) )
903
904	! Dispatch mapping indices and discrete distances on each processor
905	! -----------------------------------------------------------------
906
907	com_east = 0
908	com_west = 0
909	com_south = 0
910	com_north = 0
911
912	com_east_b = 0
913	com_west_b = 0
914	com_south_b = 0
915	com_north_b = 0
916
917	DO igrd = 1, jpbgrd
918	icount = 0
919	! Loop on rimwidth to ensure outermost points come first in the local arrays.
920	DO ir=1, nn_rimwidth(ib_bdy)
921	DO ib = 1, nblendta(igrd,ib_bdy)
922	! check if point is in local domain and equals ir
923	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
924	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino .AND. &
925	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
926	!
927	icount = icount + 1
928
929	! Rather assume that boundary data indices are given on global domain
930	! TO BE DISCUSSED ?
931	! idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
932	! idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
933	idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+jpizoom
934	idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+jpjzoom
935	! check if point has to be sent
936	ii = idx_bdy(ib_bdy)%nbi(icount,igrd)
937	ij = idx_bdy(ib_bdy)%nbj(icount,igrd)
938	if((com_east .ne. 1) .and. (ii .eq. (nlci-1)) .and. (nbondi .le. 0)) then
939	com_east = 1
940	elseif((com_west .ne. 1) .and. (ii .eq. 2) .and. (nbondi .ge. 0) .and. (nbondi .ne. 2)) then
941	com_west = 1
942	endif
943	if((com_south .ne. 1) .and. (ij .eq. 2) .and. (nbondj .ge. 0) .and. (nbondj .ne. 2)) then
944	com_south = 1
945	elseif((com_north .ne. 1) .and. (ij .eq. (nlcj-1)) .and. (nbondj .le. 0)) then
946	com_north = 1
947	endif
948	idx_bdy(ib_bdy)%nbr(icount,igrd) = nbrdta(ib,igrd,ib_bdy)
949	idx_bdy(ib_bdy)%nbmap(icount,igrd) = ib
950	ENDIF
951	! check if point has to be received from a neighbour
952	IF(nbondi .eq. 0) THEN
953	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
954	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
955	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
956	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
957	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
958	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
959	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
960	com_south = 1
961	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
962	com_north = 1
963	endif
964	com_west_b = 1
965	endif
966	ENDIF
967	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
968	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
969	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
970	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
971	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
972	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
973	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
974	com_south = 1
975	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
976	com_north = 1
977	endif
978	com_east_b = 1
979	endif
980	ENDIF
981	ELSEIF(nbondi .eq. 1) THEN
982	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
983	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
984	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
985	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
986	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
987	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
988	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
989	com_south = 1
990	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
991	com_north = 1
992	endif
993	com_west_b = 1
994	endif
995	ENDIF
996	ELSEIF(nbondi .eq. -1) THEN
997	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
998	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
999	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1000	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
1001	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
1002	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
1003	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
1004	com_south = 1
1005	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
1006	com_north = 1
1007	endif
1008	com_east_b = 1
1009	endif
1010	ENDIF
1011	ENDIF
1012	IF(nbondj .eq. 0) THEN
1013	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1014	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1015	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1016	com_north_b = 1
1017	ENDIF
1018	IF(com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 &
1019	&.OR. nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1020	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1021	com_south_b = 1
1022	ENDIF
1023	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1024	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1025	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1026	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1027	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
1028	com_south_b = 1
1029	endif
1030	ENDIF
1031	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1032	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1033	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1034	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1035	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
1036	com_north_b = 1
1037	endif
1038	ENDIF
1039	ELSEIF(nbondj .eq. 1) THEN
1040	IF( com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 .OR. &
1041	& nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1042	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1043	com_south_b = 1
1044	ENDIF
1045	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1046	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1047	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1048	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1049	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
1050	com_south_b = 1
1051	endif
1052	ENDIF
1053	ELSEIF(nbondj .eq. -1) THEN
1054	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1055	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1056	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1057	com_north_b = 1
1058	ENDIF
1059	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1060	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1061	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1062	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1063	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
1064	com_north_b = 1
1065	endif
1066	ENDIF
1067	ENDIF
1068	ENDDO
1069	ENDDO
1070	ENDDO
1071
1072	! definition of the i- and j- direction local boundaries arrays
1073	! used for sending the boudaries
1074	IF((com_east .eq. 1) .and. (com_west .eq. 1)) THEN
1075	nbondi_bdy(ib_bdy) = 0
1076	ELSEIF ((com_east .eq. 1) .and. (com_west .eq. 0)) THEN
1077	nbondi_bdy(ib_bdy) = -1
1078	ELSEIF ((com_east .eq. 0) .and. (com_west .eq. 1)) THEN
1079	nbondi_bdy(ib_bdy) = 1
1080	ENDIF
1081
1082	IF((com_north .eq. 1) .and. (com_south .eq. 1)) THEN
1083	nbondj_bdy(ib_bdy) = 0
1084	ELSEIF ((com_north .eq. 1) .and. (com_south .eq. 0)) THEN
1085	nbondj_bdy(ib_bdy) = -1
1086	ELSEIF ((com_north .eq. 0) .and. (com_south .eq. 1)) THEN
1087	nbondj_bdy(ib_bdy) = 1
1088	ENDIF
1089
1090	! definition of the i- and j- direction local boundaries arrays
1091	! used for receiving the boudaries
1092	IF((com_east_b .eq. 1) .and. (com_west_b .eq. 1)) THEN
1093	nbondi_bdy_b(ib_bdy) = 0
1094	ELSEIF ((com_east_b .eq. 1) .and. (com_west_b .eq. 0)) THEN
1095	nbondi_bdy_b(ib_bdy) = -1
1096	ELSEIF ((com_east_b .eq. 0) .and. (com_west_b .eq. 1)) THEN
1097	nbondi_bdy_b(ib_bdy) = 1
1098	ENDIF
1099
1100	IF((com_north_b .eq. 1) .and. (com_south_b .eq. 1)) THEN
1101	nbondj_bdy_b(ib_bdy) = 0
1102	ELSEIF ((com_north_b .eq. 1) .and. (com_south_b .eq. 0)) THEN
1103	nbondj_bdy_b(ib_bdy) = -1
1104	ELSEIF ((com_north_b .eq. 0) .and. (com_south_b .eq. 1)) THEN
1105	nbondj_bdy_b(ib_bdy) = 1
1106	ENDIF
1107
1108	! Compute rim weights for FRS scheme
1109	! ----------------------------------
1110	DO igrd = 1, jpbgrd
1111	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1112	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1113	idx_bdy(ib_bdy)%nbw(ib,igrd) = 1.- TANH( FLOAT( nbr - 1 ) *0.5 ) ! tanh formulation
1114	! idx_bdy(ib_bdy)%nbw(ib,igrd) = (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))**2. ! quadratic
1115	! idx_bdy(ib_bdy)%nbw(ib,igrd) = FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)) ! linear
1116	END DO
1117	END DO
1118
1119	! Compute damping coefficients
1120	! ----------------------------
1121	DO igrd = 1, jpbgrd
1122	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1123	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1124	idx_bdy(ib_bdy)%nbd(ib,igrd) = 1. / ( rn_time_dmp(ib_bdy) * rday ) &
1125	& (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))*2. ! quadratic
1126	idx_bdy(ib_bdy)%nbdout(ib,igrd) = 1. / ( rn_time_dmp_out(ib_bdy) * rday ) &
1127	& (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))*2. ! quadratic
1128	END DO
1129	END DO
1130
1131	ENDDO
1132
1133	! ------------------------------------------------------
1134	! Initialise masks and find normal/tangential directions
1135	! ------------------------------------------------------
1136
1137	! Read global 2D mask at T-points: bdytmask
1138	! -----------------------------------------
1139	! bdytmask = 1 on the computational domain AND on open boundaries
1140	! = 0 elsewhere
1141
1142	IF( ln_mask_file ) THEN
1143	CALL iom_open( cn_mask_file, inum )
1144	CALL iom_get ( inum, jpdom_data, 'bdy_msk', bdytmask(:,:) )
1145	CALL iom_close( inum )
1146
1147	! Derive mask on U and V grid from mask on T grid
1148	bdyumask(:,:) = 0.e0
1149	bdyvmask(:,:) = 0.e0
1150	DO ij=1, jpjm1
1151	DO ii=1, jpim1
1152	bdyumask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii+1, ij )
1153	bdyvmask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii ,ij+1)
1154	END DO
1155	END DO
1156	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. ) ! Lateral boundary cond.
1157
1158
1159	! Mask corrections
1160	! ----------------
1161	DO ik = 1, jpkm1
1162	DO ij = 1, jpj
1163	DO ii = 1, jpi
1164	tmask(ii,ij,ik) = tmask(ii,ij,ik) * bdytmask(ii,ij)
1165	umask(ii,ij,ik) = umask(ii,ij,ik) * bdyumask(ii,ij)
1166	vmask(ii,ij,ik) = vmask(ii,ij,ik) * bdyvmask(ii,ij)
1167	bmask(ii,ij) = bmask(ii,ij) * bdytmask(ii,ij)
1168	END DO
1169	END DO
1170	END DO
1171
1172	DO ik = 1, jpkm1
1173	DO ij = 2, jpjm1
1174	DO ii = 2, jpim1
1175	fmask(ii,ij,ik) = fmask(ii,ij,ik) * bdytmask(ii,ij ) * bdytmask(ii+1,ij ) &
1176	& * bdytmask(ii,ij+1) * bdytmask(ii+1,ij+1)
1177	END DO
1178	END DO
1179	END DO
1180
1181	tmask_i (:,:) = ssmask(:,:) * tmask_i(:,:)
1182
1183	ENDIF ! ln_mask_file=.TRUE.
1184
1185	bdytmask(:,:) = ssmask(:,:)
1186	IF( .not. ln_mask_file ) THEN
1187	! If .not. ln_mask_file then we need to derive mask on U and V grid
1188	! from mask on T grid here.
1189	bdyumask(:,:) = 0.e0
1190	bdyvmask(:,:) = 0.e0
1191	DO ij=1, jpjm1
1192	DO ii=1, jpim1
1193	bdyumask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii+1, ij )
1194	bdyvmask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii ,ij+1)
1195	END DO
1196	END DO
1197	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. ) ! Lateral boundary cond.
1198	ENDIF
1199
1200	! bdy masks and bmask are now set to zero on boundary points:
1201	igrd = 1 ! In the free surface case, bmask is at T-points
1202	DO ib_bdy = 1, nb_bdy
1203	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1204	bmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1205	ENDDO
1206	ENDDO
1207	!
1208	igrd = 1
1209	DO ib_bdy = 1, nb_bdy
1210	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1211	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1212	ENDDO
1213	ENDDO
1214	!
1215	igrd = 2
1216	DO ib_bdy = 1, nb_bdy
1217	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1218	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1219	ENDDO
1220	ENDDO
1221	!
1222	igrd = 3
1223	DO ib_bdy = 1, nb_bdy
1224	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1225	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1226	ENDDO
1227	ENDDO
1228
1229	! For the flagu/flagv calculation below we require a version of fmask without
1230	! the land boundary condition (shlat) included:
1231	CALL wrk_alloc(jpi,jpj,zfmask)
1232	DO ij = 2, jpjm1
1233	DO ii = 2, jpim1
1234	zfmask(ii,ij) = tmask(ii,ij ,1) * tmask(ii+1,ij ,1) &
1235	& * tmask(ii,ij+1,1) * tmask(ii+1,ij+1,1)
1236	END DO
1237	END DO
1238
1239	! Lateral boundary conditions
1240	CALL lbc_lnk( zfmask , 'F', 1. )
1241	CALL lbc_lnk( fmask , 'F', 1. ) ; CALL lbc_lnk( bdytmask(:,:), 'T', 1. )
1242	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. )
1243
1244	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1245
1246	idx_bdy(ib_bdy)%flagu(:,:) = 0.e0
1247	idx_bdy(ib_bdy)%flagv(:,:) = 0.e0
1248	icount = 0
1249
1250	! Calculate relationship of U direction to the local orientation of the boundary
1251	! flagu = -1 : u component is normal to the dynamical boundary and its direction is outward
1252	! flagu = 0 : u is tangential
1253	! flagu = 1 : u is normal to the boundary and is direction is inward
1254
1255	DO igrd = 1,jpbgrd
1256	SELECT CASE( igrd )
1257	CASE( 1 )
1258	pmask => umask(:,:,1)
1259	i_offset = 0
1260	CASE( 2 )
1261	pmask => bdytmask
1262	i_offset = 1
1263	CASE( 3 )
1264	pmask => zfmask(:,:)
1265	i_offset = 0
1266	END SELECT
1267	icount = 0
1268	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1269	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1270	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1271	zefl = pmask(nbi+i_offset-1,nbj)
1272	zwfl = pmask(nbi+i_offset,nbj)
1273	! This error check only works if you are using the bdyXmask arrays
1274	IF( i_offset == 1 .and. zefl + zwfl == 2 ) THEN
1275	icount = icount + 1
1276	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(nbi),mjg(nbj)
1277	ELSE
1278	idx_bdy(ib_bdy)%flagu(ib,igrd) = -zefl + zwfl
1279	ENDIF
1280	END DO
1281	IF( icount /= 0 ) THEN
1282	IF(lwp) WRITE(numout,*)
1283	IF(lwp) WRITE(numout,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1284	' are not boundary points (flagu calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1285	IF(lwp) WRITE(numout,*) ' ========== '
1286	IF(lwp) WRITE(numout,*)
1287	nstop = nstop + 1
1288	ENDIF
1289	END DO
1290
1291	! Calculate relationship of V direction to the local orientation of the boundary
1292	! flagv = -1 : v component is normal to the dynamical boundary but its direction is outward
1293	! flagv = 0 : v is tangential
1294	! flagv = 1 : v is normal to the boundary and is direction is inward
1295
1296	DO igrd = 1,jpbgrd
1297	SELECT CASE( igrd )
1298	CASE( 1 )
1299	pmask => vmask(:,:,1)
1300	j_offset = 0
1301	CASE( 2 )
1302	pmask => zfmask(:,:)
1303	j_offset = 0
1304	CASE( 3 )
1305	pmask => bdytmask
1306	j_offset = 1
1307	END SELECT
1308	icount = 0
1309	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1310	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1311	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1312	znfl = pmask(nbi,nbj+j_offset-1 )
1313	zsfl = pmask(nbi,nbj+j_offset)
1314	! This error check only works if you are using the bdyXmask arrays
1315	IF( j_offset == 1 .and. znfl + zsfl == 2 ) THEN
1316	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(nbi),mjg(nbj)
1317	icount = icount + 1
1318	ELSE
1319	idx_bdy(ib_bdy)%flagv(ib,igrd) = -znfl + zsfl
1320	END IF
1321	END DO
1322	IF( icount /= 0 ) THEN
1323	IF(lwp) WRITE(numout,*)
1324	IF(lwp) WRITE(numout,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1325	' are not boundary points (flagv calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1326	IF(lwp) WRITE(numout,*) ' ========== '
1327	IF(lwp) WRITE(numout,*)
1328	nstop = nstop + 1
1329	ENDIF
1330	END DO
1331
1332	END DO
1333
1334	! Compute total lateral surface for volume correction:
1335	! ----------------------------------------------------
1336	! JC: this must be done at each time step with key_vvl
1337	bdysurftot = 0.e0
1338	IF( ln_vol ) THEN
1339	igrd = 2 ! Lateral surface at U-points
1340	DO ib_bdy = 1, nb_bdy
1341	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1342	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1343	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1344	flagu => idx_bdy(ib_bdy)%flagu(ib,igrd)
1345	bdysurftot = bdysurftot + hu (nbi , nbj) &
1346	& * e2u (nbi , nbj) * ABS( flagu ) &
1347	& * tmask_i(nbi , nbj) &
1348	& * tmask_i(nbi+1, nbj)
1349	ENDDO
1350	ENDDO
1351
1352	igrd=3 ! Add lateral surface at V-points
1353	DO ib_bdy = 1, nb_bdy
1354	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1355	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1356	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1357	flagv => idx_bdy(ib_bdy)%flagv(ib,igrd)
1358	bdysurftot = bdysurftot + hv (nbi, nbj ) &
1359	& * e1v (nbi, nbj ) * ABS( flagv ) &
1360	& * tmask_i(nbi, nbj ) &
1361	& * tmask_i(nbi, nbj+1)
1362	ENDDO
1363	ENDDO
1364	!
1365	IF( lk_mpp ) CALL mpp_sum( bdysurftot ) ! sum over the global domain
1366	END IF
1367	!
1368	! Tidy up
1369	!--------
1370	IF (nb_bdy>0) THEN
1371	DEALLOCATE(nbidta, nbjdta, nbrdta)
1372	ENDIF
1373
1374	CALL wrk_dealloc(jpi,jpj,zfmask)
1375
1376	IF( nn_timing == 1 ) CALL timing_stop('bdy_init')
1377
1378	END SUBROUTINE bdy_init
1379
1380	SUBROUTINE bdy_ctl_seg
1381	!!----------------------------------------------------------------------
1382	!! * ROUTINE bdy_ctl_seg *
1383	!!
1384	!! ** Purpose : Check straight open boundary segments location
1385	!!
1386	!! ** Method : - Look for open boundary corners
1387	!! - Check that segments start or end on land
1388	!!----------------------------------------------------------------------
1389	INTEGER :: ib, ib1, ib2, ji ,jj, itest
1390	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1391	REAL(wp), DIMENSION(2) :: ztestmask
1392	!!----------------------------------------------------------------------
1393	!
1394	IF (lwp) WRITE(numout,*) ' '
1395	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1396	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1397	!
1398	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1399	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1400	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1401	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1402	! 1. Check bounds
1403	!----------------
1404	DO ib = 1, nbdysegn
1405	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1406	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1407	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1408	IF (jpindt(ib).ge.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1409	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1410	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1411	END DO
1412	!
1413	DO ib = 1, nbdysegs
1414	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1415	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1416	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1417	IF (jpisdt(ib).ge.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1418	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1419	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1420	END DO
1421	!
1422	DO ib = 1, nbdysege
1423	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1424	IF ((jpieob(ib).ge.jpiglo-1).or.&
1425	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1426	IF (jpjedt(ib).ge.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1427	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1428	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1429	END DO
1430	!
1431	DO ib = 1, nbdysegw
1432	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1433	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1434	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1435	IF (jpjwdt(ib).ge.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1436	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1437	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1438	ENDDO
1439	!
1440	!
1441	! 2. Look for segment crossings
1442	!------------------------------
1443	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1444	!
1445	itest = 0 ! corner number
1446	!
1447	! flag to detect if start or end of open boundary belongs to a corner
1448	! if not (=0), it must be on land.
1449	! if a corner is detected, save bdy package number for further tests
1450	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1451	! South/West crossings
1452	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1453	DO ib1 = 1, nbdysegw
1454	DO ib2 = 1, nbdysegs
1455	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1456	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1457	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1458	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1459	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1460	! We have a possible South-West corner
1461	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1462	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1463	icornw(ib1,1) = npckgs(ib2)
1464	icorns(ib2,1) = npckgw(ib1)
1465	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1466	IF(lwp) WRITE(numout,*)
1467	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1468	& jpisft(ib2), jpjwft(ib1)
1469	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1470	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1471	& ' and South segment: ',npckgs(ib2)
1472	IF(lwp) WRITE(numout,*)
1473	nstop = nstop + 1
1474	ELSE
1475	IF(lwp) WRITE(numout,*)
1476	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and West Open boundary indices'
1477	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1478	& ' and South segment: ',npckgs(ib2)
1479	IF(lwp) WRITE(numout,*)
1480	nstop = nstop+1
1481	END IF
1482	END IF
1483	END DO
1484	END DO
1485	END IF
1486	!
1487	! South/East crossings
1488	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1489	DO ib1 = 1, nbdysege
1490	DO ib2 = 1, nbdysegs
1491	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1492	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1493	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1494	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1495	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1496	! We have a possible South-East corner
1497	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1498	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1499	icorne(ib1,1) = npckgs(ib2)
1500	icorns(ib2,2) = npckge(ib1)
1501	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1502	IF(lwp) WRITE(numout,*)
1503	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1504	& jpisdt(ib2), jpjeft(ib1)
1505	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1506	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1507	& ' and South segment: ',npckgs(ib2)
1508	IF(lwp) WRITE(numout,*)
1509	nstop = nstop + 1
1510	ELSE
1511	IF(lwp) WRITE(numout,*)
1512	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and East Open boundary indices'
1513	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1514	& ' and South segment: ',npckgs(ib2)
1515	IF(lwp) WRITE(numout,*)
1516	nstop = nstop + 1
1517	END IF
1518	END IF
1519	END DO
1520	END DO
1521	END IF
1522	!
1523	! North/West crossings
1524	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1525	DO ib1 = 1, nbdysegw
1526	DO ib2 = 1, nbdysegn
1527	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1528	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1529	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1530	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1531	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1532	! We have a possible North-West corner
1533	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1534	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1535	icornw(ib1,2) = npckgn(ib2)
1536	icornn(ib2,1) = npckgw(ib1)
1537	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1538	IF(lwp) WRITE(numout,*)
1539	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1540	& jpinft(ib2), jpjwdt(ib1)
1541	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1542	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1543	& ' and North segment: ',npckgn(ib2)
1544	IF(lwp) WRITE(numout,*)
1545	nstop = nstop + 1
1546	ELSE
1547	IF(lwp) WRITE(numout,*)
1548	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and West Open boundary indices'
1549	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1550	& ' and North segment: ',npckgn(ib2)
1551	IF(lwp) WRITE(numout,*)
1552	nstop = nstop + 1
1553	END IF
1554	END IF
1555	END DO
1556	END DO
1557	END IF
1558	!
1559	! North/East crossings
1560	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1561	DO ib1 = 1, nbdysege
1562	DO ib2 = 1, nbdysegn
1563	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1564	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1565	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1566	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1567	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1568	! We have a possible North-East corner
1569	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1570	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1571	icorne(ib1,2) = npckgn(ib2)
1572	icornn(ib2,2) = npckge(ib1)
1573	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1574	IF(lwp) WRITE(numout,*)
1575	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1576	& jpindt(ib2), jpjedt(ib1)
1577	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1578	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1579	& ' and North segment: ',npckgn(ib2)
1580	IF(lwp) WRITE(numout,*)
1581	nstop = nstop + 1
1582	ELSE
1583	IF(lwp) WRITE(numout,*)
1584	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and East Open boundary indices'
1585	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1586	& ' and North segment: ',npckgn(ib2)
1587	IF(lwp) WRITE(numout,*)
1588	nstop = nstop + 1
1589	END IF
1590	END IF
1591	END DO
1592	END DO
1593	END IF
1594	!
1595	! 3. Check if segment extremities are on land
1596	!--------------------------------------------
1597	!
1598	! West segments
1599	DO ib = 1, nbdysegw
1600	! get mask at boundary extremities:
1601	ztestmask(1:2)=0.
1602	DO ji = 1, jpi
1603	DO jj = 1, jpj
1604	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1605	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1606	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1607	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1608	END DO
1609	END DO
1610	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1611
1612	IF (ztestmask(1)==1) THEN
1613	IF (icornw(ib,1)==0) THEN
1614	IF(lwp) WRITE(numout,*)
1615	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1616	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1617	IF(lwp) WRITE(numout,*)
1618	nstop = nstop + 1
1619	ELSE
1620	! This is a corner
1621	IF(lwp) WRITE(numout,*) 'Found a South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1622	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1623	itest=itest+1
1624	ENDIF
1625	ENDIF
1626	IF (ztestmask(2)==1) THEN
1627	IF (icornw(ib,2)==0) THEN
1628	IF(lwp) WRITE(numout,*)
1629	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1630	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1631	IF(lwp) WRITE(numout,*)
1632	nstop = nstop + 1
1633	ELSE
1634	! This is a corner
1635	IF(lwp) WRITE(numout,*) 'Found a North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1636	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1637	itest=itest+1
1638	ENDIF
1639	ENDIF
1640	END DO
1641	!
1642	! East segments
1643	DO ib = 1, nbdysege
1644	! get mask at boundary extremities:
1645	ztestmask(1:2)=0.
1646	DO ji = 1, jpi
1647	DO jj = 1, jpj
1648	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1649	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1650	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1651	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1652	END DO
1653	END DO
1654	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1655
1656	IF (ztestmask(1)==1) THEN
1657	IF (icorne(ib,1)==0) THEN
1658	IF(lwp) WRITE(numout,*)
1659	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1660	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1661	IF(lwp) WRITE(numout,*)
1662	nstop = nstop + 1
1663	ELSE
1664	! This is a corner
1665	IF(lwp) WRITE(numout,*) 'Found a South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1666	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1667	itest=itest+1
1668	ENDIF
1669	ENDIF
1670	IF (ztestmask(2)==1) THEN
1671	IF (icorne(ib,2)==0) THEN
1672	IF(lwp) WRITE(numout,*)
1673	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1674	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1675	IF(lwp) WRITE(numout,*)
1676	nstop = nstop + 1
1677	ELSE
1678	! This is a corner
1679	IF(lwp) WRITE(numout,*) 'Found a North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1680	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1681	itest=itest+1
1682	ENDIF
1683	ENDIF
1684	END DO
1685	!
1686	! South segments
1687	DO ib = 1, nbdysegs
1688	! get mask at boundary extremities:
1689	ztestmask(1:2)=0.
1690	DO ji = 1, jpi
1691	DO jj = 1, jpj
1692	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1693	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1694	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1695	& ((ji + nimpp - 1) == jpisft(ib))) ztestmask(2)=tmask(ji,jj,1)
1696	END DO
1697	END DO
1698	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1699
1700	IF ((ztestmask(1)==1).AND.(icorns(ib,1)==0)) THEN
1701	IF(lwp) WRITE(numout,*)
1702	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1703	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1704	IF(lwp) WRITE(numout,*)
1705	nstop = nstop + 1
1706	ENDIF
1707	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1708	IF(lwp) WRITE(numout,*)
1709	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1710	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1711	IF(lwp) WRITE(numout,*)
1712	nstop = nstop + 1
1713	ENDIF
1714	END DO
1715	!
1716	! North segments
1717	DO ib = 1, nbdysegn
1718	! get mask at boundary extremities:
1719	ztestmask(1:2)=0.
1720	DO ji = 1, jpi
1721	DO jj = 1, jpj
1722	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1723	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1724	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1725	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1726	END DO
1727	END DO
1728	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1729
1730	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1731	IF(lwp) WRITE(numout,*)
1732	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1733	IF(lwp) WRITE(numout,*) ' ========== does not start on land'
1734	IF(lwp) WRITE(numout,*)
1735	nstop = nstop + 1
1736	ENDIF
1737	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1738	IF(lwp) WRITE(numout,*)
1739	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1740	IF(lwp) WRITE(numout,*) ' ========== does not end on land'
1741	IF(lwp) WRITE(numout,*)
1742	nstop = nstop + 1
1743	ENDIF
1744	END DO
1745	!
1746	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1747	!
1748	! Other tests TBD:
1749	! segments completly on land
1750	! optimized open boundary array length according to landmask
1751	! Nudging layers that overlap with interior domain
1752	!
1753	END SUBROUTINE bdy_ctl_seg
1754
1755	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1756	!!----------------------------------------------------------------------
1757	!! * ROUTINE bdy_ctl_corn *
1758	!!
1759	!! ** Purpose : Check numerical schemes consistency between
1760	!! segments having a common corner
1761	!!
1762	!! ** Method :
1763	!!----------------------------------------------------------------------
1764	INTEGER, INTENT(in) :: ib1, ib2
1765	INTEGER :: itest
1766	!!----------------------------------------------------------------------
1767	itest = 0
1768
1769	IF (cn_dyn2d(ib1)/=cn_dyn2d(ib2)) itest = itest + 1
1770	IF (cn_dyn3d(ib1)/=cn_dyn3d(ib2)) itest = itest + 1
1771	IF (cn_tra(ib1)/=cn_tra(ib2)) itest = itest + 1
1772	!
1773	IF (nn_dyn2d_dta(ib1)/=nn_dyn2d_dta(ib2)) itest = itest + 1
1774	IF (nn_dyn3d_dta(ib1)/=nn_dyn3d_dta(ib2)) itest = itest + 1
1775	IF (nn_tra_dta(ib1)/=nn_tra_dta(ib2)) itest = itest + 1
1776	!
1777	IF (nn_rimwidth(ib1)/=nn_rimwidth(ib2)) itest = itest + 1
1778	!
1779	IF ( itest>0 ) THEN
1780	IF(lwp) WRITE(numout,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1781	IF(lwp) WRITE(numout,*) ' ========== have different open bdy schemes'
1782	IF(lwp) WRITE(numout,*)
1783	nstop = nstop + 1
1784	ENDIF
1785	!
1786	END SUBROUTINE bdy_ctl_corn
1787
1788	#else
1789	!!---------------------------------------------------------------------------------
1790	!! Dummy module NO open boundaries
1791	!!---------------------------------------------------------------------------------
1792	CONTAINS
1793	SUBROUTINE bdy_init ! Dummy routine
1794	END SUBROUTINE bdy_init
1795	#endif
1796
1797	!!=================================================================================
1798	END MODULE bdyini

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