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bdyini.F90 in NEMO/branches/2018/dev_r10057_ENHANCE03_ZTILDE/tests/COMODO-IW/MY_SRC – NEMO

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source: NEMO/branches/2018/dev_r10057_ENHANCE03_ZTILDE/tests/COMODO-IW/MY_SRC/bdyini.F90 @ 10118

Last change on this file since 10118 was 10118, checked in by jchanut, 6 years ago
ztilde update (4): #2126 Add internal wave ALE benchmark (from COMODO group)
File size: 84.8 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) optimization of BDY communications
15	!! 3.7 ! 2016 (T. Lovato) Remove bdy macro, call here init for dta and tides
16	!!----------------------------------------------------------------------
17	!! bdy_init : Initialization of unstructured open boundaries
18	!!----------------------------------------------------------------------
19	USE oce ! ocean dynamics and tracers variables
20	USE dom_oce ! ocean space and time domain
21	USE bdy_oce ! unstructured open boundary conditions
22	USE bdydta ! open boundary cond. setting (bdy_dta_init routine)
23	USE bdytides ! open boundary cond. setting (bdytide_init routine)
24	USE sbctide ! Tidal forcing or not
25	USE phycst , ONLY: rday
26	!
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
32	IMPLICIT NONE
33	PRIVATE
34
35	PUBLIC bdy_init ! routine called in nemo_init
36
37	INTEGER, PARAMETER :: jp_nseg = 100 !
38	INTEGER, PARAMETER :: nrimmax = 155 ! maximum rimwidth in structured
39	! open boundary data files
40	! Straight open boundary segment parameters:
41	INTEGER :: nbdysege, nbdysegw, nbdysegn, nbdysegs
42	INTEGER, DIMENSION(jp_nseg) :: jpieob, jpjedt, jpjeft, npckge !
43	INTEGER, DIMENSION(jp_nseg) :: jpiwob, jpjwdt, jpjwft, npckgw !
44	INTEGER, DIMENSION(jp_nseg) :: jpjnob, jpindt, jpinft, npckgn !
45	INTEGER, DIMENSION(jp_nseg) :: jpjsob, jpisdt, jpisft, npckgs !
46	!!----------------------------------------------------------------------
47	!! NEMO/OCE 4.0 , NEMO Consortium (2018)
48	!! $Id: bdyini.F90 9807 2018-06-15 22:51:16Z lovato $
49	!! Software governed by the CeCILL licence (./LICENSE)
50	!!----------------------------------------------------------------------
51	CONTAINS
52
53	SUBROUTINE bdy_init
54	!!----------------------------------------------------------------------
55	!! * ROUTINE bdy_init *
56	!!
57	!! ** Purpose : Initialization of the dynamics and tracer fields with
58	!! unstructured open boundaries.
59	!!
60	!! ** Method : Read initialization arrays (mask, indices) to identify
61	!! an unstructured open boundary
62	!!
63	!! ** Input : bdy_init.nc, input file for unstructured open boundaries
64	!!----------------------------------------------------------------------
65	NAMELIST/nambdy/ ln_bdy, nb_bdy, ln_coords_file, cn_coords_file, &
66	& ln_mask_file, cn_mask_file, cn_dyn2d, nn_dyn2d_dta, &
67	& cn_dyn3d, nn_dyn3d_dta, cn_tra, nn_tra_dta, &
68	& ln_tra_dmp, ln_dyn3d_dmp, rn_time_dmp, rn_time_dmp_out, &
69	& cn_ice, nn_ice_dta, &
70	& rn_ice_tem, rn_ice_sal, rn_ice_age, &
71	& ln_vol, nn_volctl, nn_rimwidth, nb_jpk_bdy
72	!
73	INTEGER :: ios ! Local integer output status for namelist read
74	!!----------------------------------------------------------------------
75
76	! ------------------------
77	! Read namelist parameters
78	! ------------------------
79	REWIND( numnam_ref ) ! Namelist nambdy in reference namelist :Unstructured open boundaries
80	READ ( numnam_ref, nambdy, IOSTAT = ios, ERR = 901)
81	901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in reference namelist', lwp )
82	REWIND( numnam_cfg ) ! Namelist nambdy in configuration namelist :Unstructured open boundaries
83	READ ( numnam_cfg, nambdy, IOSTAT = ios, ERR = 902 )
84	902 IF( ios > 0 ) CALL ctl_nam ( ios , 'nambdy in configuration namelist', lwp )
85	IF(lwm) WRITE ( numond, nambdy )
86
87	IF( .NOT. Agrif_Root() ) ln_bdy = .FALSE. ! forced for Agrif children
88
89	! -----------------------------------------
90	! unstructured open boundaries use control
91	! -----------------------------------------
92	IF ( ln_bdy ) THEN
93	IF(lwp) WRITE(numout,*)
94	IF(lwp) WRITE(numout,*) 'bdy_init : initialization of open boundaries'
95	IF(lwp) WRITE(numout,*) '~~~~~~~~'
96	!
97	! Open boundaries definition (arrays and masks)
98	CALL bdy_segs
99	!
100	! Open boundaries initialisation of external data arrays
101	CALL bdy_dta_init
102	!
103	! Open boundaries initialisation of tidal harmonic forcing
104	IF( ln_tide ) CALL bdytide_init
105	!
106	ELSE
107	IF(lwp) WRITE(numout,*)
108	IF(lwp) WRITE(numout,*) 'bdy_init : open boundaries not used (ln_bdy = F)'
109	IF(lwp) WRITE(numout,*) '~~~~~~~~'
110	!
111	ENDIF
112	!
113	END SUBROUTINE bdy_init
114
115
116	SUBROUTINE bdy_segs
117	!!----------------------------------------------------------------------
118	!! * ROUTINE bdy_init *
119	!!
120	!! ** Purpose : Definition of unstructured open boundaries.
121	!!
122	!! ** Method : Read initialization arrays (mask, indices) to identify
123	!! an unstructured open boundary
124	!!
125	!! ** Input : bdy_init.nc, input file for unstructured open boundaries
126	!!----------------------------------------------------------------------
127	INTEGER :: ib_bdy, ii, ij, ik, igrd, ib, ir, iseg ! dummy loop indices
128	INTEGER :: icount, icountr, ibr_max, ilen1, ibm1 ! local integers
129	INTEGER :: iwe, ies, iso, ino, inum, id_dummy ! - -
130	INTEGER :: igrd_start, igrd_end, jpbdta ! - -
131	INTEGER :: jpbdtau, jpbdtas ! - -
132	INTEGER :: ib_bdy1, ib_bdy2, ib1, ib2 ! - -
133	INTEGER :: i_offset, j_offset ! - -
134	INTEGER , POINTER :: nbi, nbj, nbr ! short cuts
135	REAL(wp), POINTER :: flagu, flagv ! - -
136	REAL(wp), POINTER, DIMENSION(:,:) :: pmask ! pointer to 2D mask fields
137	REAL(wp) :: zefl, zwfl, znfl, zsfl ! local scalars
138	INTEGER, DIMENSION (2) :: kdimsz
139	INTEGER, DIMENSION(jpbgrd,jp_bdy) :: nblendta ! Length of index arrays
140	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbidta, nbjdta ! Index arrays: i and j indices of bdy dta
141	INTEGER, ALLOCATABLE, DIMENSION(:,:,:) :: nbrdta ! Discrete distance from rim points
142	CHARACTER(LEN=1),DIMENSION(jpbgrd) :: cgrid
143	INTEGER :: com_east, com_west, com_south, com_north ! Flags for boundaries sending
144	INTEGER :: com_east_b, com_west_b, com_south_b, com_north_b ! Flags for boundaries receiving
145	INTEGER :: iw_b(4), ie_b(4), is_b(4), in_b(4) ! Arrays for neighbours coordinates
146	REAL(wp), TARGET, DIMENSION(jpi,jpj) :: zfmask ! temporary fmask array excluding coastal boundary condition (shlat)
147	!!
148	CHARACTER(LEN=1) :: ctypebdy ! - -
149	INTEGER :: nbdyind, nbdybeg, nbdyend
150	!!
151	NAMELIST/nambdy_index/ ctypebdy, nbdyind, nbdybeg, nbdyend
152	INTEGER :: ios ! Local integer output status for namelist read
153	!!----------------------------------------------------------------------
154	!
155	cgrid = (/'t','u','v'/)
156
157	! -----------------------------------------
158	! Check and write out namelist parameters
159	! -----------------------------------------
160	! IF( jperio /= 0 ) CALL ctl_stop( 'bdy_segs: Cyclic or symmetric,', &
161	! & ' and general open boundary condition are not compatible' )
162
163	IF( nb_bdy == 0 ) THEN
164	IF(lwp) WRITE(numout,*) 'nb_bdy = 0, NO OPEN BOUNDARIES APPLIED.'
165	ELSE
166	IF(lwp) WRITE(numout,*) 'Number of open boundary sets : ', nb_bdy
167	ENDIF
168
169	DO ib_bdy = 1,nb_bdy
170	IF(lwp) WRITE(numout,*) ' '
171	IF(lwp) WRITE(numout,*) '------ Open boundary data set ',ib_bdy,'------'
172
173	IF( ln_coords_file(ib_bdy) ) THEN
174	IF(lwp) WRITE(numout,*) 'Boundary definition read from file '//TRIM(cn_coords_file(ib_bdy))
175	ELSE
176	IF(lwp) WRITE(numout,*) 'Boundary defined in namelist.'
177	ENDIF
178	IF(lwp) WRITE(numout,*)
179
180	IF(lwp) WRITE(numout,*) 'Boundary conditions for barotropic solution: '
181	SELECT CASE( cn_dyn2d(ib_bdy) )
182	CASE( 'none' )
183	IF(lwp) WRITE(numout,*) ' no open boundary condition'
184	dta_bdy(ib_bdy)%ll_ssh = .false.
185	dta_bdy(ib_bdy)%ll_u2d = .false.
186	dta_bdy(ib_bdy)%ll_v2d = .false.
187	CASE( 'frs' )
188	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
189	dta_bdy(ib_bdy)%ll_ssh = .false.
190	dta_bdy(ib_bdy)%ll_u2d = .true.
191	dta_bdy(ib_bdy)%ll_v2d = .true.
192	CASE( 'flather' )
193	IF(lwp) WRITE(numout,*) ' Flather radiation condition'
194	dta_bdy(ib_bdy)%ll_ssh = .true.
195	dta_bdy(ib_bdy)%ll_u2d = .true.
196	dta_bdy(ib_bdy)%ll_v2d = .true.
197	CASE( 'orlanski' )
198	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
199	dta_bdy(ib_bdy)%ll_ssh = .false.
200	dta_bdy(ib_bdy)%ll_u2d = .true.
201	dta_bdy(ib_bdy)%ll_v2d = .true.
202	CASE( 'orlanski_npo' )
203	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
204	dta_bdy(ib_bdy)%ll_ssh = .false.
205	dta_bdy(ib_bdy)%ll_u2d = .true.
206	dta_bdy(ib_bdy)%ll_v2d = .true.
207	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn2d' )
208	END SELECT
209	IF( cn_dyn2d(ib_bdy) /= 'none' ) THEN
210	SELECT CASE( nn_dyn2d_dta(ib_bdy) ) !
211	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
212	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
213	CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' tidal harmonic forcing taken from file'
214	CASE( 3 ) ; IF(lwp) WRITE(numout,*) ' boundary data AND tidal harmonic forcing taken from files'
215	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn2d_dta must be between 0 and 3' )
216	END SELECT
217	IF (( nn_dyn2d_dta(ib_bdy) .ge. 2 ).AND.(.NOT.ln_tide)) THEN
218	CALL ctl_stop( 'You must activate with ln_tide to add tidal forcing at open boundaries' )
219	ENDIF
220	ENDIF
221	IF(lwp) WRITE(numout,*)
222
223	IF(lwp) WRITE(numout,*) 'Boundary conditions for baroclinic velocities: '
224	SELECT CASE( cn_dyn3d(ib_bdy) )
225	CASE('none')
226	IF(lwp) WRITE(numout,*) ' no open boundary condition'
227	dta_bdy(ib_bdy)%ll_u3d = .false.
228	dta_bdy(ib_bdy)%ll_v3d = .false.
229	CASE('frs')
230	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
231	dta_bdy(ib_bdy)%ll_u3d = .true.
232	dta_bdy(ib_bdy)%ll_v3d = .true.
233	CASE('specified')
234	IF(lwp) WRITE(numout,*) ' Specified value'
235	dta_bdy(ib_bdy)%ll_u3d = .true.
236	dta_bdy(ib_bdy)%ll_v3d = .true.
237	CASE('neumann')
238	IF(lwp) WRITE(numout,*) ' Neumann conditions'
239	dta_bdy(ib_bdy)%ll_u3d = .false.
240	dta_bdy(ib_bdy)%ll_v3d = .false.
241	CASE('zerograd')
242	IF(lwp) WRITE(numout,*) ' Zero gradient for baroclinic velocities'
243	dta_bdy(ib_bdy)%ll_u3d = .false.
244	dta_bdy(ib_bdy)%ll_v3d = .false.
245	CASE('zero')
246	IF(lwp) WRITE(numout,*) ' Zero baroclinic velocities (runoff case)'
247	dta_bdy(ib_bdy)%ll_u3d = .false.
248	dta_bdy(ib_bdy)%ll_v3d = .false.
249	CASE('orlanski')
250	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
251	dta_bdy(ib_bdy)%ll_u3d = .true.
252	dta_bdy(ib_bdy)%ll_v3d = .true.
253	CASE('orlanski_npo')
254	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
255	dta_bdy(ib_bdy)%ll_u3d = .true.
256	dta_bdy(ib_bdy)%ll_v3d = .true.
257	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn3d' )
258	END SELECT
259	IF( cn_dyn3d(ib_bdy) /= 'none' ) THEN
260	SELECT CASE( nn_dyn3d_dta(ib_bdy) ) !
261	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
262	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
263	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn3d_dta must be 0 or 1' )
264	END SELECT
265	ENDIF
266
267	IF ( ln_dyn3d_dmp(ib_bdy) ) THEN
268	IF ( cn_dyn3d(ib_bdy) == 'none' ) THEN
269	IF(lwp) WRITE(numout,*) 'No open boundary condition for baroclinic velocities: ln_dyn3d_dmp is set to .false.'
270	ln_dyn3d_dmp(ib_bdy)=.false.
271	ELSEIF ( cn_dyn3d(ib_bdy) == 'frs' ) THEN
272	CALL ctl_stop( 'Use FRS OR relaxation' )
273	ELSE
274	IF(lwp) WRITE(numout,*) ' + baroclinic velocities relaxation zone'
275	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
276	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
277	dta_bdy(ib_bdy)%ll_u3d = .true.
278	dta_bdy(ib_bdy)%ll_v3d = .true.
279	ENDIF
280	ELSE
281	IF(lwp) WRITE(numout,*) ' NO relaxation on baroclinic velocities'
282	ENDIF
283	IF(lwp) WRITE(numout,*)
284
285	IF(lwp) WRITE(numout,*) 'Boundary conditions for temperature and salinity: '
286	SELECT CASE( cn_tra(ib_bdy) )
287	CASE('none')
288	IF(lwp) WRITE(numout,*) ' no open boundary condition'
289	dta_bdy(ib_bdy)%ll_tem = .false.
290	dta_bdy(ib_bdy)%ll_sal = .false.
291	CASE('frs')
292	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
293	dta_bdy(ib_bdy)%ll_tem = .true.
294	dta_bdy(ib_bdy)%ll_sal = .true.
295	CASE('specified')
296	IF(lwp) WRITE(numout,*) ' Specified value'
297	dta_bdy(ib_bdy)%ll_tem = .true.
298	dta_bdy(ib_bdy)%ll_sal = .true.
299	CASE('neumann')
300	IF(lwp) WRITE(numout,*) ' Neumann conditions'
301	dta_bdy(ib_bdy)%ll_tem = .false.
302	dta_bdy(ib_bdy)%ll_sal = .false.
303	CASE('runoff')
304	IF(lwp) WRITE(numout,*) ' Runoff conditions : Neumann for T and specified to 0.1 for salinity'
305	dta_bdy(ib_bdy)%ll_tem = .false.
306	dta_bdy(ib_bdy)%ll_sal = .false.
307	CASE('orlanski')
308	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
309	dta_bdy(ib_bdy)%ll_tem = .true.
310	dta_bdy(ib_bdy)%ll_sal = .true.
311	CASE('orlanski_npo')
312	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
313	dta_bdy(ib_bdy)%ll_tem = .true.
314	dta_bdy(ib_bdy)%ll_sal = .true.
315	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_tra' )
316	END SELECT
317	IF( cn_tra(ib_bdy) /= 'none' ) THEN
318	SELECT CASE( nn_tra_dta(ib_bdy) ) !
319	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
320	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
321	CASE DEFAULT ; CALL ctl_stop( 'nn_tra_dta must be 0 or 1' )
322	END SELECT
323	ENDIF
324
325	IF ( ln_tra_dmp(ib_bdy) ) THEN
326	IF ( cn_tra(ib_bdy) == 'none' ) THEN
327	IF(lwp) WRITE(numout,*) 'No open boundary condition for tracers: ln_tra_dmp is set to .false.'
328	ln_tra_dmp(ib_bdy)=.false.
329	ELSEIF ( cn_tra(ib_bdy) == 'frs' ) THEN
330	CALL ctl_stop( 'Use FRS OR relaxation' )
331	ELSE
332	IF(lwp) WRITE(numout,*) ' + T/S relaxation zone'
333	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
334	IF(lwp) WRITE(numout,*) ' Outflow damping time scale: ',rn_time_dmp_out(ib_bdy),' days'
335	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
336	dta_bdy(ib_bdy)%ll_tem = .true.
337	dta_bdy(ib_bdy)%ll_sal = .true.
338	ENDIF
339	ELSE
340	IF(lwp) WRITE(numout,*) ' NO T/S relaxation'
341	ENDIF
342	IF(lwp) WRITE(numout,*)
343
344	#if defined key_si3
345	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
346	SELECT CASE( cn_ice(ib_bdy) )
347	CASE('none')
348	IF(lwp) WRITE(numout,*) ' no open boundary condition'
349	dta_bdy(ib_bdy)%ll_a_i = .false.
350	dta_bdy(ib_bdy)%ll_h_i = .false.
351	dta_bdy(ib_bdy)%ll_h_s = .false.
352	CASE('frs')
353	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
354	dta_bdy(ib_bdy)%ll_a_i = .true.
355	dta_bdy(ib_bdy)%ll_h_i = .true.
356	dta_bdy(ib_bdy)%ll_h_s = .true.
357	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_ice' )
358	END SELECT
359	IF( cn_ice(ib_bdy) /= 'none' ) THEN
360	SELECT CASE( nn_ice_dta(ib_bdy) ) !
361	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
362	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
363	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_dta must be 0 or 1' )
364	END SELECT
365	ENDIF
366	IF(lwp) WRITE(numout,*)
367	IF(lwp) WRITE(numout,*) ' tem of bdy sea-ice = ', rn_ice_tem(ib_bdy)
368	IF(lwp) WRITE(numout,*) ' sal of bdy sea-ice = ', rn_ice_sal(ib_bdy)
369	IF(lwp) WRITE(numout,*) ' age of bdy sea-ice = ', rn_ice_age(ib_bdy)
370	#endif
371
372	IF(lwp) WRITE(numout,*) ' Width of relaxation zone = ', nn_rimwidth(ib_bdy)
373	IF(lwp) WRITE(numout,*)
374	!
375	END DO
376
377	IF( nb_bdy > 0 ) THEN
378	IF( ln_vol ) THEN ! check volume conservation (nn_volctl value)
379	IF(lwp) WRITE(numout,*) 'Volume correction applied at open boundaries'
380	IF(lwp) WRITE(numout,*)
381	SELECT CASE ( nn_volctl )
382	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' The total volume will be constant'
383	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' The total volume will vary according to the surface E-P flux'
384	CASE DEFAULT ; CALL ctl_stop( 'nn_volctl must be 0 or 1' )
385	END SELECT
386	IF(lwp) WRITE(numout,*)
387	ELSE
388	IF(lwp) WRITE(numout,*) 'No volume correction applied at open boundaries'
389	IF(lwp) WRITE(numout,*)
390	ENDIF
391	IF( nb_jpk_bdy > 0 ) THEN
392	IF(lwp) WRITE(numout,) ' open boundary will be interpolate in the vertical onto the native grid *'
393	ELSE
394	IF(lwp) WRITE(numout,) ' open boundary will be read straight onto the native grid without vertical interpolation *'
395	ENDIF
396	ENDIF
397
398	! -------------------------------------------------
399	! Initialise indices arrays for open boundaries
400	! -------------------------------------------------
401
402	! Work out global dimensions of boundary data
403	! ---------------------------------------------
404	REWIND( numnam_cfg )
405
406	nblendta(:,:) = 0
407	nbdysege = 0
408	nbdysegw = 0
409	nbdysegn = 0
410	nbdysegs = 0
411	icount = 0 ! count user defined segments
412	! Dimensions below are used to allocate arrays to read external data
413	jpbdtas = 1 ! Maximum size of boundary data (structured case)
414	jpbdtau = 1 ! Maximum size of boundary data (unstructured case)
415
416	DO ib_bdy = 1, nb_bdy
417
418	IF( .NOT. ln_coords_file(ib_bdy) ) THEN ! Work out size of global arrays from namelist parameters
419
420	icount = icount + 1
421	! No REWIND here because may need to read more than one nambdy_index namelist.
422	! Read only namelist_cfg to avoid unseccessfull overwrite
423	! keep full control of the configuration namelist
424	READ ( numnam_cfg, nambdy_index, IOSTAT = ios, ERR = 904 )
425	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in configuration namelist', lwp )
426	IF(lwm) WRITE ( numond, nambdy_index )
427
428	SELECT CASE ( TRIM(ctypebdy) )
429	CASE( 'N' )
430	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
431	nbdyind = jpjglo - 2 ! set boundary to whole side of model domain.
432	nbdybeg = 2
433	nbdyend = jpiglo - 1
434	ENDIF
435	nbdysegn = nbdysegn + 1
436	npckgn(nbdysegn) = ib_bdy ! Save bdy package number
437	jpjnob(nbdysegn) = nbdyind
438	jpindt(nbdysegn) = nbdybeg
439	jpinft(nbdysegn) = nbdyend
440	!
441	CASE( 'S' )
442	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
443	nbdyind = 2 ! set boundary to whole side of model domain.
444	nbdybeg = 2
445	nbdyend = jpiglo - 1
446	ENDIF
447	nbdysegs = nbdysegs + 1
448	npckgs(nbdysegs) = ib_bdy ! Save bdy package number
449	jpjsob(nbdysegs) = nbdyind
450	jpisdt(nbdysegs) = nbdybeg
451	jpisft(nbdysegs) = nbdyend
452	!
453	CASE( 'E' )
454	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
455	nbdyind = jpiglo - 2 ! set boundary to whole side of model domain.
456	nbdybeg = 2
457	nbdyend = jpjglo - 1
458	ENDIF
459	nbdysege = nbdysege + 1
460	npckge(nbdysege) = ib_bdy ! Save bdy package number
461	jpieob(nbdysege) = nbdyind
462	jpjedt(nbdysege) = nbdybeg
463	jpjeft(nbdysege) = nbdyend
464	!
465	CASE( 'W' )
466	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
467	nbdyind = 2 ! set boundary to whole side of model domain.
468	nbdybeg = 2
469	nbdyend = jpjglo - 1
470	ENDIF
471	nbdysegw = nbdysegw + 1
472	npckgw(nbdysegw) = ib_bdy ! Save bdy package number
473	jpiwob(nbdysegw) = nbdyind
474	jpjwdt(nbdysegw) = nbdybeg
475	jpjwft(nbdysegw) = nbdyend
476	!
477	CASE DEFAULT ; CALL ctl_stop( 'ctypebdy must be N, S, E or W' )
478	END SELECT
479
480	! For simplicity we assume that in case of straight bdy, arrays have the same length
481	! (even if it is true that last tangential velocity points
482	! are useless). This simplifies a little bit boundary data format (and agrees with format
483	! used so far in obc package)
484
485	nblendta(1:jpbgrd,ib_bdy) = (nbdyend - nbdybeg + 1) * nn_rimwidth(ib_bdy)
486	jpbdtas = MAX(jpbdtas, (nbdyend - nbdybeg + 1))
487	IF (lwp.and.(nn_rimwidth(ib_bdy)>nrimmax)) &
488	& CALL ctl_stop( 'rimwidth must be lower than nrimmax' )
489
490	ELSE ! Read size of arrays in boundary coordinates file.
491	CALL iom_open( cn_coords_file(ib_bdy), inum )
492	DO igrd = 1, jpbgrd
493	id_dummy = iom_varid( inum, 'nbi'//cgrid(igrd), kdimsz=kdimsz )
494	nblendta(igrd,ib_bdy) = MAXVAL(kdimsz)
495	jpbdtau = MAX(jpbdtau, MAXVAL(kdimsz))
496	END DO
497	CALL iom_close( inum )
498	!
499	ENDIF
500	!
501	END DO ! ib_bdy
502
503	IF (nb_bdy>0) THEN
504	jpbdta = MAXVAL(nblendta(1:jpbgrd,1:nb_bdy))
505
506	! Allocate arrays
507	!---------------
508	ALLOCATE( nbidta(jpbdta, jpbgrd, nb_bdy), nbjdta(jpbdta, jpbgrd, nb_bdy), &
509	& nbrdta(jpbdta, jpbgrd, nb_bdy) )
510
511	IF( nb_jpk_bdy>0 ) THEN
512	ALLOCATE( dta_global(jpbdtau, 1, nb_jpk_bdy) )
513	ALLOCATE( dta_global_z(jpbdtau, 1, nb_jpk_bdy) )
514	ALLOCATE( dta_global_dz(jpbdtau, 1, nb_jpk_bdy) )
515	ELSE
516	ALLOCATE( dta_global(jpbdtau, 1, jpk) )
517	ALLOCATE( dta_global_z(jpbdtau, 1, jpk) ) ! needed ?? TODO
518	ALLOCATE( dta_global_dz(jpbdtau, 1, jpk) )! needed ?? TODO
519	ENDIF
520
521	IF ( icount>0 ) THEN
522	IF( nb_jpk_bdy>0 ) THEN
523	ALLOCATE( dta_global2(jpbdtas, nrimmax, nb_jpk_bdy) )
524	ALLOCATE( dta_global2_z(jpbdtas, nrimmax, nb_jpk_bdy) )
525	ALLOCATE( dta_global2_dz(jpbdtas, nrimmax, nb_jpk_bdy) )
526	ELSE
527	ALLOCATE( dta_global2(jpbdtas, nrimmax, jpk) )
528	ALLOCATE( dta_global2_z(jpbdtas, nrimmax, jpk) ) ! needed ?? TODO
529	ALLOCATE( dta_global2_dz(jpbdtas, nrimmax, jpk) )! needed ?? TODO
530	ENDIF
531	ENDIF
532	!
533	ENDIF
534
535	! Now look for crossings in user (namelist) defined open boundary segments:
536	!--------------------------------------------------------------------------
537	IF( icount>0 ) CALL bdy_ctl_seg
538
539	! Calculate global boundary index arrays or read in from file
540	!------------------------------------------------------------
541	! 1. Read global index arrays from boundary coordinates file.
542	DO ib_bdy = 1, nb_bdy
543	!
544	IF( ln_coords_file(ib_bdy) ) THEN
545	!
546	CALL iom_open( cn_coords_file(ib_bdy), inum )
547	DO igrd = 1, jpbgrd
548	CALL iom_get( inum, jpdom_unknown, 'nbi'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
549	DO ii = 1,nblendta(igrd,ib_bdy)
550	nbidta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
551	END DO
552	CALL iom_get( inum, jpdom_unknown, 'nbj'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
553	DO ii = 1,nblendta(igrd,ib_bdy)
554	nbjdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
555	END DO
556	CALL iom_get( inum, jpdom_unknown, 'nbr'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
557	DO ii = 1,nblendta(igrd,ib_bdy)
558	nbrdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
559	END DO
560	!
561	ibr_max = MAXVAL( nbrdta(:,igrd,ib_bdy) )
562	IF(lwp) WRITE(numout,*)
563	IF(lwp) WRITE(numout,*) ' Maximum rimwidth in file is ', ibr_max
564	IF(lwp) WRITE(numout,*) ' nn_rimwidth from namelist is ', nn_rimwidth(ib_bdy)
565	IF (ibr_max < nn_rimwidth(ib_bdy)) &
566	CALL ctl_stop( 'nn_rimwidth is larger than maximum rimwidth in file',cn_coords_file(ib_bdy) )
567	END DO
568	CALL iom_close( inum )
569	!
570	ENDIF
571	!
572	END DO
573
574	! 2. Now fill indices corresponding to straight open boundary arrays:
575	! East
576	!-----
577	DO iseg = 1, nbdysege
578	ib_bdy = npckge(iseg)
579	!
580	! ------------ T points -------------
581	igrd=1
582	icount=0
583	DO ir = 1, nn_rimwidth(ib_bdy)
584	DO ij = jpjedt(iseg), jpjeft(iseg)
585	icount = icount + 1
586	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
587	nbjdta(icount, igrd, ib_bdy) = ij
588	nbrdta(icount, igrd, ib_bdy) = ir
589	ENDDO
590	ENDDO
591	!
592	! ------------ U points -------------
593	igrd=2
594	icount=0
595	DO ir = 1, nn_rimwidth(ib_bdy)
596	DO ij = jpjedt(iseg), jpjeft(iseg)
597	icount = icount + 1
598	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 1 - ir
599	nbjdta(icount, igrd, ib_bdy) = ij
600	nbrdta(icount, igrd, ib_bdy) = ir
601	ENDDO
602	ENDDO
603	!
604	! ------------ V points -------------
605	igrd=3
606	icount=0
607	DO ir = 1, nn_rimwidth(ib_bdy)
608	! DO ij = jpjedt(iseg), jpjeft(iseg) - 1
609	DO ij = jpjedt(iseg), jpjeft(iseg)
610	icount = icount + 1
611	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
612	nbjdta(icount, igrd, ib_bdy) = ij
613	nbrdta(icount, igrd, ib_bdy) = ir
614	ENDDO
615	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
616	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
617	ENDDO
618	ENDDO
619	!
620	! West
621	!-----
622	DO iseg = 1, nbdysegw
623	ib_bdy = npckgw(iseg)
624	!
625	! ------------ T points -------------
626	igrd=1
627	icount=0
628	DO ir = 1, nn_rimwidth(ib_bdy)
629	DO ij = jpjwdt(iseg), jpjwft(iseg)
630	icount = icount + 1
631	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
632	nbjdta(icount, igrd, ib_bdy) = ij
633	nbrdta(icount, igrd, ib_bdy) = ir
634	ENDDO
635	ENDDO
636	!
637	! ------------ U points -------------
638	igrd=2
639	icount=0
640	DO ir = 1, nn_rimwidth(ib_bdy)
641	DO ij = jpjwdt(iseg), jpjwft(iseg)
642	icount = icount + 1
643	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
644	nbjdta(icount, igrd, ib_bdy) = ij
645	nbrdta(icount, igrd, ib_bdy) = ir
646	ENDDO
647	ENDDO
648	!
649	! ------------ V points -------------
650	igrd=3
651	icount=0
652	DO ir = 1, nn_rimwidth(ib_bdy)
653	! DO ij = jpjwdt(iseg), jpjwft(iseg) - 1
654	DO ij = jpjwdt(iseg), jpjwft(iseg)
655	icount = icount + 1
656	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
657	nbjdta(icount, igrd, ib_bdy) = ij
658	nbrdta(icount, igrd, ib_bdy) = ir
659	ENDDO
660	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
661	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
662	ENDDO
663	ENDDO
664	!
665	! North
666	!-----
667	DO iseg = 1, nbdysegn
668	ib_bdy = npckgn(iseg)
669	!
670	! ------------ T points -------------
671	igrd=1
672	icount=0
673	DO ir = 1, nn_rimwidth(ib_bdy)
674	DO ii = jpindt(iseg), jpinft(iseg)
675	icount = icount + 1
676	nbidta(icount, igrd, ib_bdy) = ii
677	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
678	nbrdta(icount, igrd, ib_bdy) = ir
679	ENDDO
680	ENDDO
681	!
682	! ------------ U points -------------
683	igrd=2
684	icount=0
685	DO ir = 1, nn_rimwidth(ib_bdy)
686	! DO ii = jpindt(iseg), jpinft(iseg) - 1
687	DO ii = jpindt(iseg), jpinft(iseg)
688	icount = icount + 1
689	nbidta(icount, igrd, ib_bdy) = ii
690	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
691	nbrdta(icount, igrd, ib_bdy) = ir
692	ENDDO
693	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
694	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
695	ENDDO
696	!
697	! ------------ V points -------------
698	igrd=3
699	icount=0
700	DO ir = 1, nn_rimwidth(ib_bdy)
701	DO ii = jpindt(iseg), jpinft(iseg)
702	icount = icount + 1
703	nbidta(icount, igrd, ib_bdy) = ii
704	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 1 - ir
705	nbrdta(icount, igrd, ib_bdy) = ir
706	ENDDO
707	ENDDO
708	ENDDO
709	!
710	! South
711	!-----
712	DO iseg = 1, nbdysegs
713	ib_bdy = npckgs(iseg)
714	!
715	! ------------ T points -------------
716	igrd=1
717	icount=0
718	DO ir = 1, nn_rimwidth(ib_bdy)
719	DO ii = jpisdt(iseg), jpisft(iseg)
720	icount = icount + 1
721	nbidta(icount, igrd, ib_bdy) = ii
722	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
723	nbrdta(icount, igrd, ib_bdy) = ir
724	ENDDO
725	ENDDO
726	!
727	! ------------ U points -------------
728	igrd=2
729	icount=0
730	DO ir = 1, nn_rimwidth(ib_bdy)
731	! DO ii = jpisdt(iseg), jpisft(iseg) - 1
732	DO ii = jpisdt(iseg), jpisft(iseg)
733	icount = icount + 1
734	nbidta(icount, igrd, ib_bdy) = ii
735	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
736	nbrdta(icount, igrd, ib_bdy) = ir
737	ENDDO
738	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
739	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
740	ENDDO
741	!
742	! ------------ V points -------------
743	igrd=3
744	icount=0
745	DO ir = 1, nn_rimwidth(ib_bdy)
746	DO ii = jpisdt(iseg), jpisft(iseg)
747	icount = icount + 1
748	nbidta(icount, igrd, ib_bdy) = ii
749	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
750	nbrdta(icount, igrd, ib_bdy) = ir
751	ENDDO
752	ENDDO
753	ENDDO
754
755	! Deal with duplicated points
756	!-----------------------------
757	! We assign negative indices to duplicated points (to remove them from bdy points to be updated)
758	! if their distance to the bdy is greater than the other
759	! If their distance are the same, just keep only one to avoid updating a point twice
760	DO igrd = 1, jpbgrd
761	DO ib_bdy1 = 1, nb_bdy
762	DO ib_bdy2 = 1, nb_bdy
763	IF (ib_bdy1/=ib_bdy2) THEN
764	DO ib1 = 1, nblendta(igrd,ib_bdy1)
765	DO ib2 = 1, nblendta(igrd,ib_bdy2)
766	IF ((nbidta(ib1, igrd, ib_bdy1)==nbidta(ib2, igrd, ib_bdy2)).AND. &
767	& (nbjdta(ib1, igrd, ib_bdy1)==nbjdta(ib2, igrd, ib_bdy2))) THEN
768	! IF ((lwp).AND.(igrd==1)) WRITE(numout,*) ' found coincident point ji, jj:', &
769	! & nbidta(ib1, igrd, ib_bdy1), &
770	! & nbjdta(ib2, igrd, ib_bdy2)
771	! keep only points with the lowest distance to boundary:
772	IF (nbrdta(ib1, igrd, ib_bdy1)<nbrdta(ib2, igrd, ib_bdy2)) THEN
773	nbidta(ib2, igrd, ib_bdy2) =-ib_bdy2
774	nbjdta(ib2, igrd, ib_bdy2) =-ib_bdy2
775	ELSEIF (nbrdta(ib1, igrd, ib_bdy1)>nbrdta(ib2, igrd, ib_bdy2)) THEN
776	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
777	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
778	! Arbitrary choice if distances are the same:
779	ELSE
780	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
781	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
782	ENDIF
783	END IF
784	END DO
785	END DO
786	ENDIF
787	END DO
788	END DO
789	END DO
790
791	! Work out dimensions of boundary data on each processor
792	! ------------------------------------------------------
793
794	! Rather assume that boundary data indices are given on global domain
795	! TO BE DISCUSSED ?
796	! iw = mig(1) + 1 ! if monotasking and no zoom, iw=2
797	! ie = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
798	! is = mjg(1) + 1 ! if monotasking and no zoom, is=2
799	! in = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
800	iwe = mig(1) - 1 + 2 ! if monotasking and no zoom, iw=2
801	ies = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
802	iso = mjg(1) - 1 + 2 ! if monotasking and no zoom, is=2
803	ino = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
804
805	ALLOCATE( nbondi_bdy(nb_bdy))
806	ALLOCATE( nbondj_bdy(nb_bdy))
807	nbondi_bdy(:)=2
808	nbondj_bdy(:)=2
809	ALLOCATE( nbondi_bdy_b(nb_bdy))
810	ALLOCATE( nbondj_bdy_b(nb_bdy))
811	nbondi_bdy_b(:)=2
812	nbondj_bdy_b(:)=2
813
814	! Work out dimensions of boundary data on each neighbour process
815	IF(nbondi == 0) THEN
816	iw_b(1) = 1 + nimppt(nowe+1)
817	ie_b(1) = 1 + nimppt(nowe+1)+nlcit(nowe+1)-3
818	is_b(1) = 1 + njmppt(nowe+1)
819	in_b(1) = 1 + njmppt(nowe+1)+nlcjt(nowe+1)-3
820
821	iw_b(2) = 1 + nimppt(noea+1)
822	ie_b(2) = 1 + nimppt(noea+1)+nlcit(noea+1)-3
823	is_b(2) = 1 + njmppt(noea+1)
824	in_b(2) = 1 + njmppt(noea+1)+nlcjt(noea+1)-3
825	ELSEIF(nbondi == 1) THEN
826	iw_b(1) = 1 + nimppt(nowe+1)
827	ie_b(1) = 1 + nimppt(nowe+1)+nlcit(nowe+1)-3
828	is_b(1) = 1 + njmppt(nowe+1)
829	in_b(1) = 1 + njmppt(nowe+1)+nlcjt(nowe+1)-3
830	ELSEIF(nbondi == -1) THEN
831	iw_b(2) = 1 + nimppt(noea+1)
832	ie_b(2) = 1 + nimppt(noea+1)+nlcit(noea+1)-3
833	is_b(2) = 1 + njmppt(noea+1)
834	in_b(2) = 1 + njmppt(noea+1)+nlcjt(noea+1)-3
835	ENDIF
836
837	IF(nbondj == 0) THEN
838	iw_b(3) = 1 + nimppt(noso+1)
839	ie_b(3) = 1 + nimppt(noso+1)+nlcit(noso+1)-3
840	is_b(3) = 1 + njmppt(noso+1)
841	in_b(3) = 1 + njmppt(noso+1)+nlcjt(noso+1)-3
842
843	iw_b(4) = 1 + nimppt(nono+1)
844	ie_b(4) = 1 + nimppt(nono+1)+nlcit(nono+1)-3
845	is_b(4) = 1 + njmppt(nono+1)
846	in_b(4) = 1 + njmppt(nono+1)+nlcjt(nono+1)-3
847	ELSEIF(nbondj == 1) THEN
848	iw_b(3) = 1 + nimppt(noso+1)
849	ie_b(3) = 1 + nimppt(noso+1)+nlcit(noso+1)-3
850	is_b(3) = 1 + njmppt(noso+1)
851	in_b(3) = 1 + njmppt(noso+1)+nlcjt(noso+1)-3
852	ELSEIF(nbondj == -1) THEN
853	iw_b(4) = 1 + nimppt(nono+1)
854	ie_b(4) = 1 + nimppt(nono+1)+nlcit(nono+1)-3
855	is_b(4) = 1 + njmppt(nono+1)
856	in_b(4) = 1 + njmppt(nono+1)+nlcjt(nono+1)-3
857	ENDIF
858
859	DO ib_bdy = 1, nb_bdy
860	DO igrd = 1, jpbgrd
861	icount = 0
862	icountr = 0
863	idx_bdy(ib_bdy)%nblen(igrd) = 0
864	idx_bdy(ib_bdy)%nblenrim(igrd) = 0
865	DO ib = 1, nblendta(igrd,ib_bdy)
866	! check that data is in correct order in file
867	ibm1 = MAX(1,ib-1)
868	IF(lwp) THEN ! Since all procs read global data only need to do this check on one proc...
869	IF( nbrdta(ib,igrd,ib_bdy) < nbrdta(ibm1,igrd,ib_bdy) ) THEN
870	CALL ctl_stop('bdy_segs : ERROR : boundary data in file must be defined ', &
871	& ' in order of distance from edge nbr A utility for re-ordering ', &
872	& ' boundary coordinates and data files exists in the TOOLS/OBC directory')
873	ENDIF
874	ENDIF
875	! check if point is in local domain
876	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
877	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino ) THEN
878	!
879	icount = icount + 1
880	!
881	IF( nbrdta(ib,igrd,ib_bdy) == 1 ) icountr = icountr+1
882	ENDIF
883	END DO
884	idx_bdy(ib_bdy)%nblenrim(igrd) = icountr !: length of rim boundary data on each proc
885	idx_bdy(ib_bdy)%nblen (igrd) = icount !: length of boundary data on each proc
886	END DO ! igrd
887
888	! Allocate index arrays for this boundary set
889	!--------------------------------------------
890	ilen1 = MAXVAL( idx_bdy(ib_bdy)%nblen(:) )
891	ALLOCATE( idx_bdy(ib_bdy)%nbi (ilen1,jpbgrd) , &
892	& idx_bdy(ib_bdy)%nbj (ilen1,jpbgrd) , &
893	& idx_bdy(ib_bdy)%nbr (ilen1,jpbgrd) , &
894	& idx_bdy(ib_bdy)%nbd (ilen1,jpbgrd) , &
895	& idx_bdy(ib_bdy)%nbdout(ilen1,jpbgrd) , &
896	& idx_bdy(ib_bdy)%nbmap (ilen1,jpbgrd) , &
897	& idx_bdy(ib_bdy)%nbw (ilen1,jpbgrd) , &
898	& idx_bdy(ib_bdy)%flagu (ilen1,jpbgrd) , &
899	& idx_bdy(ib_bdy)%flagv (ilen1,jpbgrd) )
900
901	! Dispatch mapping indices and discrete distances on each processor
902	! -----------------------------------------------------------------
903
904	com_east = 0
905	com_west = 0
906	com_south = 0
907	com_north = 0
908
909	com_east_b = 0
910	com_west_b = 0
911	com_south_b = 0
912	com_north_b = 0
913
914	DO igrd = 1, jpbgrd
915	icount = 0
916	! Loop on rimwidth to ensure outermost points come first in the local arrays.
917	DO ir=1, nn_rimwidth(ib_bdy)
918	DO ib = 1, nblendta(igrd,ib_bdy)
919	! check if point is in local domain and equals ir
920	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
921	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino .AND. &
922	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
923	!
924	icount = icount + 1
925
926	! Rather assume that boundary data indices are given on global domain
927	! TO BE DISCUSSED ?
928	! idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
929	! idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
930	idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
931	idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
932	! check if point has to be sent
933	ii = idx_bdy(ib_bdy)%nbi(icount,igrd)
934	ij = idx_bdy(ib_bdy)%nbj(icount,igrd)
935	if((com_east .ne. 1) .and. (ii == (nlci-1)) .and. (nbondi .le. 0)) then
936	com_east = 1
937	elseif((com_west .ne. 1) .and. (ii == 2) .and. (nbondi .ge. 0) .and. (nbondi .ne. 2)) then
938	com_west = 1
939	endif
940	if((com_south .ne. 1) .and. (ij == 2) .and. (nbondj .ge. 0) .and. (nbondj .ne. 2)) then
941	com_south = 1
942	elseif((com_north .ne. 1) .and. (ij == (nlcj-1)) .and. (nbondj .le. 0)) then
943	com_north = 1
944	endif
945	idx_bdy(ib_bdy)%nbr(icount,igrd) = nbrdta(ib,igrd,ib_bdy)
946	idx_bdy(ib_bdy)%nbmap(icount,igrd) = ib
947	ENDIF
948	! check if point has to be received from a neighbour
949	IF(nbondi == 0) THEN
950	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
951	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
952	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
953	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
954	if((com_west_b .ne. 1) .and. (ii == (nlcit(nowe+1)-1))) then
955	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
956	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
957	com_south = 1
958	elseif((ij == nlcjt(nowe+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
959	com_north = 1
960	endif
961	com_west_b = 1
962	endif
963	ENDIF
964	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
965	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
966	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
967	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
968	if((com_east_b .ne. 1) .and. (ii == 2)) then
969	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
970	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
971	com_south = 1
972	elseif((ij == nlcjt(noea+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
973	com_north = 1
974	endif
975	com_east_b = 1
976	endif
977	ENDIF
978	ELSEIF(nbondi == 1) THEN
979	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
980	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
981	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
982	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
983	if((com_west_b .ne. 1) .and. (ii == (nlcit(nowe+1)-1))) then
984	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
985	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
986	com_south = 1
987	elseif((ij == nlcjt(nowe+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
988	com_north = 1
989	endif
990	com_west_b = 1
991	endif
992	ENDIF
993	ELSEIF(nbondi == -1) THEN
994	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
995	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
996	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
997	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
998	if((com_east_b .ne. 1) .and. (ii == 2)) then
999	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
1000	if((ij == 2) .and. (nbondj == 0 .or. nbondj == 1)) then
1001	com_south = 1
1002	elseif((ij == nlcjt(noea+1)-1) .and. (nbondj == 0 .or. nbondj == -1)) then
1003	com_north = 1
1004	endif
1005	com_east_b = 1
1006	endif
1007	ENDIF
1008	ENDIF
1009	IF(nbondj == 0) THEN
1010	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1011	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1012	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1013	com_north_b = 1
1014	ENDIF
1015	IF(com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 &
1016	&.OR. nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1017	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1018	com_south_b = 1
1019	ENDIF
1020	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1021	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1022	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1023	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1024	if((com_south_b .ne. 1) .and. (ij == (nlcjt(noso+1)-1))) then
1025	com_south_b = 1
1026	endif
1027	ENDIF
1028	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1029	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1030	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1031	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1032	if((com_north_b .ne. 1) .and. (ij == 2)) then
1033	com_north_b = 1
1034	endif
1035	ENDIF
1036	ELSEIF(nbondj == 1) THEN
1037	IF( com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 .OR. &
1038	& nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1039	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1040	com_south_b = 1
1041	ENDIF
1042	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1043	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1044	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1045	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1046	if((com_south_b .ne. 1) .and. (ij == (nlcjt(noso+1)-1))) then
1047	com_south_b = 1
1048	endif
1049	ENDIF
1050	ELSEIF(nbondj == -1) THEN
1051	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1052	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1053	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1054	com_north_b = 1
1055	ENDIF
1056	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1057	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1058	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1059	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1060	if((com_north_b .ne. 1) .and. (ij == 2)) then
1061	com_north_b = 1
1062	endif
1063	ENDIF
1064	ENDIF
1065	ENDDO
1066	ENDDO
1067	ENDDO
1068
1069	! definition of the i- and j- direction local boundaries arrays used for sending the boundaries
1070	IF( (com_east == 1) .and. (com_west == 1) ) THEN ; nbondi_bdy(ib_bdy) = 0
1071	ELSEIF( (com_east == 1) .and. (com_west == 0) ) THEN ; nbondi_bdy(ib_bdy) = -1
1072	ELSEIF( (com_east == 0) .and. (com_west == 1) ) THEN ; nbondi_bdy(ib_bdy) = 1
1073	ENDIF
1074	IF( (com_north == 1) .and. (com_south == 1) ) THEN ; nbondj_bdy(ib_bdy) = 0
1075	ELSEIF( (com_north == 1) .and. (com_south == 0) ) THEN ; nbondj_bdy(ib_bdy) = -1
1076	ELSEIF( (com_north == 0) .and. (com_south == 1) ) THEN ; nbondj_bdy(ib_bdy) = 1
1077	ENDIF
1078
1079	! definition of the i- and j- direction local boundaries arrays used for receiving the boundaries
1080	IF( (com_east_b == 1) .and. (com_west_b == 1) ) THEN ; nbondi_bdy_b(ib_bdy) = 0
1081	ELSEIF( (com_east_b == 1) .and. (com_west_b == 0) ) THEN ; nbondi_bdy_b(ib_bdy) = -1
1082	ELSEIF( (com_east_b == 0) .and. (com_west_b == 1) ) THEN ; nbondi_bdy_b(ib_bdy) = 1
1083	ENDIF
1084	IF( (com_north_b == 1) .and. (com_south_b == 1) ) THEN ; nbondj_bdy_b(ib_bdy) = 0
1085	ELSEIF( (com_north_b == 1) .and. (com_south_b == 0) ) THEN ; nbondj_bdy_b(ib_bdy) = -1
1086	ELSEIF( (com_north_b == 0) .and. (com_south_b == 1) ) THEN ; nbondj_bdy_b(ib_bdy) = 1
1087	ENDIF
1088
1089	! Compute rim weights for FRS scheme
1090	! ----------------------------------
1091	DO igrd = 1, jpbgrd
1092	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1093	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1094	idx_bdy(ib_bdy)%nbw(ib,igrd) = 1.- TANH( REAL( nbr - 1 ) *0.5 ) ! tanh formulation
1095	! idx_bdy(ib_bdy)%nbw(ib,igrd) = (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))**2. ! quadratic
1096	! idx_bdy(ib_bdy)%nbw(ib,igrd) = REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)) ! linear
1097	END DO
1098	END DO
1099
1100	! Compute damping coefficients
1101	! ----------------------------
1102	! DO igrd = 1, jpbgrd
1103	! DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1104	! nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1105	! idx_bdy(ib_bdy)%nbd(ib,igrd) = 1. / ( rn_time_dmp(ib_bdy) * rday ) &
1106	! & (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))*2. ! quadratic
1107	! idx_bdy(ib_bdy)%nbdout(ib,igrd) = 1. / ( rn_time_dmp_out(ib_bdy) * rday ) &
1108	! & (REAL(nn_rimwidth(ib_bdy)+1-nbr)/REAL(nn_rimwidth(ib_bdy)))*2. ! quadratic
1109	! END DO
1110	! END DO
1111	! Hard coded COMODO sponge:
1112	DO igrd = 1, jpbgrd
1113	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1114	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1115	idx_bdy(ib_bdy)%nbd(ib,igrd) = 1._wp / ( rn_time_dmp(ib_bdy) * rday ) &
1116	& EXP(-5.0E-51000._wp*(nbr-1._wp)) ! exponential
1117	idx_bdy(ib_bdy)%nbdout(ib,igrd) = 1._wp / ( rn_time_dmp_out(ib_bdy) * rday ) &
1118	& EXP(-5.0E-51000._wp*(nbr-1._wp)) ! exponential
1119	END DO
1120	END DO
1121	END DO
1122
1123	! ------------------------------------------------------
1124	! Initialise masks and find normal/tangential directions
1125	! ------------------------------------------------------
1126
1127	! Read global 2D mask at T-points: bdytmask
1128	! -----------------------------------------
1129	! bdytmask = 1 on the computational domain AND on open boundaries
1130	! = 0 elsewhere
1131
1132	bdytmask(:,:) = ssmask(:,:)
1133
1134	! Derive mask on U and V grid from mask on T grid
1135
1136	bdyumask(:,:) = 0._wp
1137	bdyvmask(:,:) = 0._wp
1138	DO ij = 1, jpjm1
1139	DO ii = 1, jpim1
1140	bdyumask(ii,ij) = bdytmask(ii,ij) * bdytmask(ii+1, ij )
1141	bdyvmask(ii,ij) = bdytmask(ii,ij) * bdytmask(ii ,ij+1)
1142	END DO
1143	END DO
1144	CALL lbc_lnk_multi( bdyumask, 'U', 1. , bdyvmask, 'V', 1. ) ! Lateral boundary cond.
1145
1146	! bdy masks are now set to zero on boundary points:
1147	!
1148	igrd = 1
1149	DO ib_bdy = 1, nb_bdy
1150	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1151	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1152	END DO
1153	END DO
1154	!
1155	igrd = 2
1156	DO ib_bdy = 1, nb_bdy
1157	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1158	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1159	END DO
1160	END DO
1161	!
1162	igrd = 3
1163	DO ib_bdy = 1, nb_bdy
1164	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1165	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0._wp
1166	END DO
1167	END DO
1168
1169	! For the flagu/flagv calculation below we require a version of fmask without
1170	! the land boundary condition (shlat) included:
1171	zfmask(:,:) = 0
1172	DO ij = 2, jpjm1
1173	DO ii = 2, jpim1
1174	zfmask(ii,ij) = tmask(ii,ij ,1) * tmask(ii+1,ij ,1) &
1175	& * tmask(ii,ij+1,1) * tmask(ii+1,ij+1,1)
1176	END DO
1177	END DO
1178
1179	! Lateral boundary conditions
1180	CALL lbc_lnk( zfmask, 'F', 1. )
1181	CALL lbc_lnk_multi( bdyumask, 'U', 1. , bdyvmask, 'V', 1., bdytmask, 'T', 1. )
1182	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1183
1184	idx_bdy(ib_bdy)%flagu(:,:) = 0._wp
1185	idx_bdy(ib_bdy)%flagv(:,:) = 0._wp
1186	icount = 0
1187
1188	! Calculate relationship of U direction to the local orientation of the boundary
1189	! flagu = -1 : u component is normal to the dynamical boundary and its direction is outward
1190	! flagu = 0 : u is tangential
1191	! flagu = 1 : u is normal to the boundary and is direction is inward
1192
1193	DO igrd = 1, jpbgrd
1194	SELECT CASE( igrd )
1195	CASE( 1 ) ; pmask => umask (:,:,1) ; i_offset = 0
1196	CASE( 2 ) ; pmask => bdytmask(:,:) ; i_offset = 1
1197	CASE( 3 ) ; pmask => zfmask (:,:) ; i_offset = 0
1198	END SELECT
1199	icount = 0
1200	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1201	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1202	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1203	zefl = pmask(nbi+i_offset-1,nbj)
1204	zwfl = pmask(nbi+i_offset,nbj)
1205	! This error check only works if you are using the bdyXmask arrays
1206	IF( i_offset == 1 .and. zefl + zwfl == 2 ) THEN
1207	icount = icount + 1
1208	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(nbi),mjg(nbj)
1209	ELSE
1210	idx_bdy(ib_bdy)%flagu(ib,igrd) = -zefl + zwfl
1211	ENDIF
1212	END DO
1213	IF( icount /= 0 ) THEN
1214	IF(lwp) WRITE(numout,*)
1215	IF(lwp) WRITE(numout,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1216	' are not boundary points (flagu calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1217	IF(lwp) WRITE(numout,*) ' ========== '
1218	IF(lwp) WRITE(numout,*)
1219	nstop = nstop + 1
1220	ENDIF
1221	END DO
1222
1223	! Calculate relationship of V direction to the local orientation of the boundary
1224	! flagv = -1 : v component is normal to the dynamical boundary but its direction is outward
1225	! flagv = 0 : v is tangential
1226	! flagv = 1 : v is normal to the boundary and is direction is inward
1227
1228	DO igrd = 1, jpbgrd
1229	SELECT CASE( igrd )
1230	CASE( 1 ) ; pmask => vmask (:,:,1) ; j_offset = 0
1231	CASE( 2 ) ; pmask => zfmask(:,:) ; j_offset = 0
1232	CASE( 3 ) ; pmask => bdytmask ; j_offset = 1
1233	END SELECT
1234	icount = 0
1235	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1236	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1237	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1238	znfl = pmask(nbi,nbj+j_offset-1)
1239	zsfl = pmask(nbi,nbj+j_offset )
1240	! This error check only works if you are using the bdyXmask arrays
1241	IF( j_offset == 1 .and. znfl + zsfl == 2 ) THEN
1242	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(nbi),mjg(nbj)
1243	icount = icount + 1
1244	ELSE
1245	idx_bdy(ib_bdy)%flagv(ib,igrd) = -znfl + zsfl
1246	END IF
1247	END DO
1248	IF( icount /= 0 ) THEN
1249	IF(lwp) WRITE(numout,*)
1250	IF(lwp) WRITE(numout,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1251	' are not boundary points (flagv calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1252	IF(lwp) WRITE(numout,*) ' ========== '
1253	IF(lwp) WRITE(numout,*)
1254	nstop = nstop + 1
1255	ENDIF
1256	END DO
1257	!
1258	END DO
1259
1260	! Compute total lateral surface for volume correction:
1261	! ----------------------------------------------------
1262	! JC: this must be done at each time step with non-linear free surface
1263	bdysurftot = 0._wp
1264	IF( ln_vol ) THEN
1265	igrd = 2 ! Lateral surface at U-points
1266	DO ib_bdy = 1, nb_bdy
1267	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1268	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1269	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1270	flagu => idx_bdy(ib_bdy)%flagu(ib,igrd)
1271	bdysurftot = bdysurftot + hu_n (nbi , nbj) &
1272	& * e2u (nbi , nbj) * ABS( flagu ) &
1273	& * tmask_i(nbi , nbj) &
1274	& * tmask_i(nbi+1, nbj)
1275	END DO
1276	END DO
1277
1278	igrd=3 ! Add lateral surface at V-points
1279	DO ib_bdy = 1, nb_bdy
1280	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1281	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1282	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1283	flagv => idx_bdy(ib_bdy)%flagv(ib,igrd)
1284	bdysurftot = bdysurftot + hv_n (nbi, nbj ) &
1285	& * e1v (nbi, nbj ) * ABS( flagv ) &
1286	& * tmask_i(nbi, nbj ) &
1287	& * tmask_i(nbi, nbj+1)
1288	END DO
1289	END DO
1290	!
1291	IF( lk_mpp ) CALL mpp_sum( bdysurftot ) ! sum over the global domain
1292	END IF
1293	!
1294	! Tidy up
1295	!--------
1296	IF( nb_bdy>0 ) DEALLOCATE( nbidta, nbjdta, nbrdta )
1297	!
1298	END SUBROUTINE bdy_segs
1299
1300
1301	SUBROUTINE bdy_ctl_seg
1302	!!----------------------------------------------------------------------
1303	!! * ROUTINE bdy_ctl_seg *
1304	!!
1305	!! ** Purpose : Check straight open boundary segments location
1306	!!
1307	!! ** Method : - Look for open boundary corners
1308	!! - Check that segments start or end on land
1309	!!----------------------------------------------------------------------
1310	INTEGER :: ib, ib1, ib2, ji ,jj, itest, icyclic
1311	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1312	REAL(wp), DIMENSION(2) :: ztestmask
1313	!!----------------------------------------------------------------------
1314	!
1315	IF (lwp) WRITE(numout,*) ' '
1316	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1317	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1318	!
1319	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1320	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1321	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1322	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1323	! 1. Check bounds
1324	!----------------
1325	DO ib = 1, nbdysegn
1326	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1327	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1328	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1329	IF (jpindt(ib).gt.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1330	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1331	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1332	END DO
1333	!
1334	DO ib = 1, nbdysegs
1335	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1336	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1337	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1338	IF (jpisdt(ib).gt.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1339	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1340	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1341	END DO
1342	!
1343	DO ib = 1, nbdysege
1344	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1345	IF ((jpieob(ib).ge.jpiglo-1).or.&
1346	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1347	IF (jpjedt(ib).gt.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1348	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1349	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1350	END DO
1351	!
1352	DO ib = 1, nbdysegw
1353	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1354	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1355	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1356	IF (jpjwdt(ib).gt.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1357	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1358	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1359	ENDDO
1360	!
1361	!
1362	! 2. Look for segment crossings
1363	!------------------------------
1364	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1365	!
1366	itest = 0 ! corner number
1367	!
1368	! flag to detect if start or end of open boundary belongs to a corner
1369	! if not (=0), it must be on land.
1370	! if a corner is detected, save bdy package number for further tests
1371	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1372	! South/West crossings
1373	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1374	DO ib1 = 1, nbdysegw
1375	DO ib2 = 1, nbdysegs
1376	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1377	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1378	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1379	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1380	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1381	! We have a possible South-West corner
1382	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1383	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1384	icornw(ib1,1) = npckgs(ib2)
1385	icorns(ib2,1) = npckgw(ib1)
1386	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1387	IF(lwp) WRITE(numout,*)
1388	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1389	& jpisft(ib2), jpjwft(ib1)
1390	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1391	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1392	& ' and South segment: ',npckgs(ib2)
1393	IF(lwp) WRITE(numout,*)
1394	nstop = nstop + 1
1395	ELSE
1396	IF(lwp) WRITE(numout,*)
1397	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and West Open boundary indices'
1398	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1399	& ' and South segment: ',npckgs(ib2)
1400	IF(lwp) WRITE(numout,*)
1401	nstop = nstop+1
1402	END IF
1403	END IF
1404	END DO
1405	END DO
1406	END IF
1407	!
1408	! South/East crossings
1409	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1410	DO ib1 = 1, nbdysege
1411	DO ib2 = 1, nbdysegs
1412	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1413	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1414	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1415	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1416	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1417	! We have a possible South-East corner
1418	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1419	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1420	icorne(ib1,1) = npckgs(ib2)
1421	icorns(ib2,2) = npckge(ib1)
1422	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1423	IF(lwp) WRITE(numout,*)
1424	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1425	& jpisdt(ib2), jpjeft(ib1)
1426	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1427	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1428	& ' and South segment: ',npckgs(ib2)
1429	IF(lwp) WRITE(numout,*)
1430	nstop = nstop + 1
1431	ELSE
1432	IF(lwp) WRITE(numout,*)
1433	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and East Open boundary indices'
1434	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1435	& ' and South segment: ',npckgs(ib2)
1436	IF(lwp) WRITE(numout,*)
1437	nstop = nstop + 1
1438	END IF
1439	END IF
1440	END DO
1441	END DO
1442	END IF
1443	!
1444	! North/West crossings
1445	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1446	DO ib1 = 1, nbdysegw
1447	DO ib2 = 1, nbdysegn
1448	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1449	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1450	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1451	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1452	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1453	! We have a possible North-West corner
1454	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1455	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1456	icornw(ib1,2) = npckgn(ib2)
1457	icornn(ib2,1) = npckgw(ib1)
1458	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1459	IF(lwp) WRITE(numout,*)
1460	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1461	& jpinft(ib2), jpjwdt(ib1)
1462	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1463	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1464	& ' and North segment: ',npckgn(ib2)
1465	IF(lwp) WRITE(numout,*)
1466	nstop = nstop + 1
1467	ELSE
1468	IF(lwp) WRITE(numout,*)
1469	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and West Open boundary indices'
1470	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1471	& ' and North segment: ',npckgn(ib2)
1472	IF(lwp) WRITE(numout,*)
1473	nstop = nstop + 1
1474	END IF
1475	END IF
1476	END DO
1477	END DO
1478	END IF
1479	!
1480	! North/East crossings
1481	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1482	DO ib1 = 1, nbdysege
1483	DO ib2 = 1, nbdysegn
1484	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1485	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1486	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1487	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1488	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1489	! We have a possible North-East corner
1490	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1491	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1492	icorne(ib1,2) = npckgn(ib2)
1493	icornn(ib2,2) = npckge(ib1)
1494	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1495	IF(lwp) WRITE(numout,*)
1496	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1497	& jpindt(ib2), jpjedt(ib1)
1498	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1499	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1500	& ' and North segment: ',npckgn(ib2)
1501	IF(lwp) WRITE(numout,*)
1502	nstop = nstop + 1
1503	ELSE
1504	IF(lwp) WRITE(numout,*)
1505	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and East Open boundary indices'
1506	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1507	& ' and North segment: ',npckgn(ib2)
1508	IF(lwp) WRITE(numout,*)
1509	nstop = nstop + 1
1510	END IF
1511	END IF
1512	END DO
1513	END DO
1514	END IF
1515	!
1516	! 3. Check if segment extremities are on land
1517	!--------------------------------------------
1518	!
1519	icyclic=0
1520	! West segments
1521	DO ib = 1, nbdysegw
1522	! get mask at boundary extremities:
1523	ztestmask(1:2)=0.
1524	DO ji = 1, jpi
1525	DO jj = 1, jpj
1526	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1527	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1528	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1529	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1530	END DO
1531	END DO
1532	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1533
1534	IF (ztestmask(1)==1) THEN
1535	IF (icornw(ib,1)==0) THEN
1536	IF ((jperio==2).AND.(jpjwdt(ib)==2)) THEN
1537	! Open boundary segment can be Cyclic North-South
1538	icyclic = icyclic+1 ! Start indice is fine for a cyclic N-S
1539	ELSE
1540	IF(lwp) WRITE(numout,*)
1541	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1542	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1543	IF(lwp) WRITE(numout,*)
1544	nstop = nstop + 1
1545	ENDIF
1546	ELSE
1547	! This is a corner
1548	IF(lwp) WRITE(numout,*) 'Found a South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1549	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1550	itest=itest+1
1551	ENDIF
1552	ENDIF
1553	IF (ztestmask(2)==1) THEN
1554	IF (icornw(ib,2)==0) THEN
1555	IF ((jperio==2).AND.(jpjwft(ib)==jpjglo-1)) THEN
1556	! Open boundary segment can be Cyclic North-South
1557	icyclic = icyclic+1 ! Start indice is fine for a cyclic N-S
1558	ELSE
1559	IF(lwp) WRITE(numout,*)
1560	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1561	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1562	IF(lwp) WRITE(numout,*)
1563	nstop = nstop + 1
1564	ENDIF
1565	ELSE
1566	! This is a corner
1567	IF(lwp) WRITE(numout,*) 'Found a North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1568	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1569	itest=itest+1
1570	ENDIF
1571	ENDIF
1572	IF ( icyclic==2 ) THEN
1573	IF(lwp) WRITE(numout,*)
1574	IF(lwp) WRITE(numout,*) ' West open boundary segment ', npckgw(ib)
1575	IF(lwp) WRITE(numout,*) ' is cyclic North-South'
1576	IF(lwp) WRITE(numout,*)
1577	ENDIF
1578	END DO
1579	!
1580	icyclic=0
1581	! East segments
1582	DO ib = 1, nbdysege
1583	! get mask at boundary extremities:
1584	ztestmask(1:2)=0.
1585	DO ji = 1, jpi
1586	DO jj = 1, jpj
1587	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1588	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1589	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1590	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1591	END DO
1592	END DO
1593	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1594
1595	IF (ztestmask(1)==1) THEN
1596	IF (icorne(ib,1)==0) THEN
1597	IF ((jperio==2).AND.(jpjedt(ib)==2)) THEN
1598	! Open boundary segment can be Cyclic North-South
1599	icyclic = icyclic+1 ! Start indice is fine for a cyclic N-S
1600	ELSE
1601	IF(lwp) WRITE(numout,*)
1602	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1603	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1604	IF(lwp) WRITE(numout,*)
1605	nstop = nstop + 1
1606	ENDIF
1607	ELSE
1608	! This is a corner
1609	IF(lwp) WRITE(numout,*) 'Found a South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1610	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1611	itest=itest+1
1612	ENDIF
1613	ENDIF
1614	IF (ztestmask(2)==1) THEN
1615	IF (icorne(ib,2)==0) THEN
1616	IF ((jperio==2).AND.(jpjeft(ib)==jpjglo-1)) THEN
1617	! Open boundary segment can be Cyclic North-South
1618	icyclic = icyclic+1 ! Start indice is fine for a cyclic N-S
1619	ELSE
1620	IF(lwp) WRITE(numout,*)
1621	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1622	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1623	IF(lwp) WRITE(numout,*)
1624	nstop = nstop + 1
1625	ENDIF
1626	ELSE
1627	! This is a corner
1628	IF(lwp) WRITE(numout,*) 'Found a North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1629	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1630	itest=itest+1
1631	ENDIF
1632	ENDIF
1633	IF ( icyclic==2 ) THEN
1634	IF(lwp) WRITE(numout,*)
1635	IF(lwp) WRITE(numout,*) ' East open boundary segment ', npckge(ib)
1636	IF(lwp) WRITE(numout,*) ' is cyclic North-South'
1637	IF(lwp) WRITE(numout,*)
1638	ENDIF
1639	END DO
1640	!
1641	! South segments
1642	icyclic=0
1643	DO ib = 1, nbdysegs
1644	! get mask at boundary extremities:
1645	ztestmask(1:2)=0.
1646	DO ji = 1, jpi
1647	DO jj = 1, jpj
1648	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1649	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1650	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1651	& ((ji + nimpp - 1) == jpisft(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).AND.(icorns(ib,1)==0)) THEN
1657	IF ((jperio==1).AND.(jpisdt(ib)==2)) THEN
1658	! Open boundary segment can be Cyclic East-West
1659	icyclic = icyclic+1 ! Start indice is fine for a cyclic east-west
1660	ELSE
1661	IF(lwp) WRITE(numout,*)
1662	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1663	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1664	IF(lwp) WRITE(numout,*)
1665	nstop = nstop + 1
1666	ENDIF
1667	ENDIF
1668	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1669	IF ((jperio==1).AND.(jpisft(ib)==jpiglo-1)) THEN
1670	! Open boundary segment can be Cyclic East-West
1671	icyclic = icyclic+1 ! Start indice is fine for a cyclic east-west
1672	ELSE
1673	IF(lwp) WRITE(numout,*)
1674	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1675	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1676	IF(lwp) WRITE(numout,*)
1677	nstop = nstop + 1
1678	ENDIF
1679	ENDIF
1680	IF ( icyclic==2 ) THEN
1681	IF(lwp) WRITE(numout,*)
1682	IF(lwp) WRITE(numout,*) ' South open boundary segment ', npckgs(ib)
1683	IF(lwp) WRITE(numout,*) ' is cyclic East-West'
1684	IF(lwp) WRITE(numout,*)
1685	ENDIF
1686	END DO
1687	!
1688	icyclic=0
1689	! North segments
1690	DO ib = 1, nbdysegn
1691	! get mask at boundary extremities:
1692	ztestmask(1:2)=0.
1693	DO ji = 1, jpi
1694	DO jj = 1, jpj
1695	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1696	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1697	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1698	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1699	END DO
1700	END DO
1701	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1702
1703	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1704	IF ((jperio==1).AND.(jpindt(ib)==2)) THEN
1705	! Open boundary segment can be Cyclic East-West
1706	icyclic = icyclic+1 ! Start indice is fine for a cyclic east-west
1707	ELSE
1708	IF(lwp) WRITE(numout,*)
1709	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1710	IF(lwp) WRITE(numout,*) ' ========== does not start on land'
1711	IF(lwp) WRITE(numout,*)
1712	nstop = nstop + 1
1713	ENDIF
1714	ENDIF
1715	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1716	IF ((jperio==1).AND.(jpindt(ib)==2)) THEN
1717	! Open boundary segment can be Cyclic East-West
1718	icyclic = icyclic+1 ! Start indice is fine for a cyclic east-west
1719	ELSE
1720	IF(lwp) WRITE(numout,*)
1721	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1722	IF(lwp) WRITE(numout,*) ' ========== does not end on land'
1723	IF(lwp) WRITE(numout,*)
1724	nstop = nstop + 1
1725	ENDIF
1726	ENDIF
1727	IF ( icyclic==2 ) THEN
1728	IF(lwp) WRITE(numout,*)
1729	IF(lwp) WRITE(numout,*) ' North open boundary segment ', npckgn(ib)
1730	IF(lwp) WRITE(numout,*) ' is cyclic East-West'
1731	IF(lwp) WRITE(numout,*)
1732	ENDIF
1733	END DO
1734	!
1735	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1736	!
1737	! Other tests TBD:
1738	! segments completly on land
1739	! optimized open boundary array length according to landmask
1740	! Nudging layers that overlap with interior domain
1741	!
1742	END SUBROUTINE bdy_ctl_seg
1743
1744
1745	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1746	!!----------------------------------------------------------------------
1747	!! * ROUTINE bdy_ctl_corn *
1748	!!
1749	!! ** Purpose : Check numerical schemes consistency between
1750	!! segments having a common corner
1751	!!
1752	!! ** Method :
1753	!!----------------------------------------------------------------------
1754	INTEGER, INTENT(in) :: ib1, ib2
1755	INTEGER :: itest
1756	!!----------------------------------------------------------------------
1757	itest = 0
1758
1759	IF( cn_dyn2d(ib1) /= cn_dyn2d(ib2) ) itest = itest + 1
1760	IF( cn_dyn3d(ib1) /= cn_dyn3d(ib2) ) itest = itest + 1
1761	IF( cn_tra (ib1) /= cn_tra (ib2) ) itest = itest + 1
1762	!
1763	IF( nn_dyn2d_dta(ib1) /= nn_dyn2d_dta(ib2) ) itest = itest + 1
1764	IF( nn_dyn3d_dta(ib1) /= nn_dyn3d_dta(ib2) ) itest = itest + 1
1765	IF( nn_tra_dta (ib1) /= nn_tra_dta (ib2) ) itest = itest + 1
1766	!
1767	IF( nn_rimwidth(ib1) /= nn_rimwidth(ib2) ) itest = itest + 1
1768	!
1769	IF( itest>0 ) THEN
1770	IF(lwp) WRITE(numout,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1771	IF(lwp) WRITE(numout,*) ' ========== have different open bdy schemes'
1772	IF(lwp) WRITE(numout,*)
1773	nstop = nstop + 1
1774	ENDIF
1775	!
1776	END SUBROUTINE bdy_ctl_corn
1777
1778	!!=================================================================================
1779	END MODULE bdyini

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