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bdyini.F90 in branches/UKMO/AMM15_v3_6_STABLE/NEMOGCM/NEMO/OPA_SRC/BDY – NEMO

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source: branches/UKMO/AMM15_v3_6_STABLE/NEMOGCM/NEMO/OPA_SRC/BDY/bdyini.F90 @ 7087

Last change on this file since 7087 was 7087, checked in by jgraham, 8 years ago
Bring in options for 3D U/V boundaries, following changes made for CO6. Options added are 'zerograd' or 'neumann' boundary conditions.
File size: 83.5 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
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('neumann')
216	IF(lwp) WRITE(numout,*) ' Neumann conditions'
217	dta_bdy(ib_bdy)%ll_u3d = .false.
218	dta_bdy(ib_bdy)%ll_v3d = .false.
219	CASE('zerograd')
220	IF(lwp) WRITE(numout,*) ' Zero gradient for baroclinic velocities'
221	dta_bdy(ib_bdy)%ll_u3d = .false.
222	dta_bdy(ib_bdy)%ll_v3d = .false.
223	CASE('zero')
224	IF(lwp) WRITE(numout,*) ' Zero baroclinic velocities (runoff case)'
225	dta_bdy(ib_bdy)%ll_u3d = .false.
226	dta_bdy(ib_bdy)%ll_v3d = .false.
227	CASE('orlanski')
228	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
229	dta_bdy(ib_bdy)%ll_u3d = .true.
230	dta_bdy(ib_bdy)%ll_v3d = .true.
231	CASE('orlanski_npo')
232	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
233	dta_bdy(ib_bdy)%ll_u3d = .true.
234	dta_bdy(ib_bdy)%ll_v3d = .true.
235	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_dyn3d' )
236	END SELECT
237	IF( cn_dyn3d(ib_bdy) /= 'none' ) THEN
238	SELECT CASE( nn_dyn3d_dta(ib_bdy) ) !
239	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
240	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
241	CASE DEFAULT ; CALL ctl_stop( 'nn_dyn3d_dta must be 0 or 1' )
242	END SELECT
243	ENDIF
244
245	IF ( ln_dyn3d_dmp(ib_bdy) ) THEN
246	IF ( cn_dyn3d(ib_bdy) == 'none' ) THEN
247	IF(lwp) WRITE(numout,*) 'No open boundary condition for baroclinic velocities: ln_dyn3d_dmp is set to .false.'
248	ln_dyn3d_dmp(ib_bdy)=.false.
249	ELSEIF ( cn_dyn3d(ib_bdy) == 'frs' ) THEN
250	CALL ctl_stop( 'Use FRS OR relaxation' )
251	ELSE
252	IF(lwp) WRITE(numout,*) ' + baroclinic velocities relaxation zone'
253	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
254	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
255	dta_bdy(ib_bdy)%ll_u3d = .true.
256	dta_bdy(ib_bdy)%ll_v3d = .true.
257	ENDIF
258	ELSE
259	IF(lwp) WRITE(numout,*) ' NO relaxation on baroclinic velocities'
260	ENDIF
261	IF(lwp) WRITE(numout,*)
262
263	IF(lwp) WRITE(numout,*) 'Boundary conditions for temperature and salinity: '
264	SELECT CASE( cn_tra(ib_bdy) )
265	CASE('none')
266	IF(lwp) WRITE(numout,*) ' no open boundary condition'
267	dta_bdy(ib_bdy)%ll_tem = .false.
268	dta_bdy(ib_bdy)%ll_sal = .false.
269	CASE('frs')
270	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
271	dta_bdy(ib_bdy)%ll_tem = .true.
272	dta_bdy(ib_bdy)%ll_sal = .true.
273	CASE('specified')
274	IF(lwp) WRITE(numout,*) ' Specified value'
275	dta_bdy(ib_bdy)%ll_tem = .true.
276	dta_bdy(ib_bdy)%ll_sal = .true.
277	CASE('neumann')
278	IF(lwp) WRITE(numout,*) ' Neumann conditions'
279	dta_bdy(ib_bdy)%ll_tem = .false.
280	dta_bdy(ib_bdy)%ll_sal = .false.
281	CASE('runoff')
282	IF(lwp) WRITE(numout,*) ' Runoff conditions : Neumann for T and specified to 0.1 for salinity'
283	dta_bdy(ib_bdy)%ll_tem = .false.
284	dta_bdy(ib_bdy)%ll_sal = .false.
285	CASE('orlanski')
286	IF(lwp) WRITE(numout,*) ' Orlanski (fully oblique) radiation condition with adaptive nudging'
287	dta_bdy(ib_bdy)%ll_tem = .true.
288	dta_bdy(ib_bdy)%ll_sal = .true.
289	CASE('orlanski_npo')
290	IF(lwp) WRITE(numout,*) ' Orlanski (NPO) radiation condition with adaptive nudging'
291	dta_bdy(ib_bdy)%ll_tem = .true.
292	dta_bdy(ib_bdy)%ll_sal = .true.
293	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_tra' )
294	END SELECT
295	IF( cn_tra(ib_bdy) /= 'none' ) THEN
296	SELECT CASE( nn_tra_dta(ib_bdy) ) !
297	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
298	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
299	CASE DEFAULT ; CALL ctl_stop( 'nn_tra_dta must be 0 or 1' )
300	END SELECT
301	ENDIF
302
303	IF ( ln_tra_dmp(ib_bdy) ) THEN
304	IF ( cn_tra(ib_bdy) == 'none' ) THEN
305	IF(lwp) WRITE(numout,*) 'No open boundary condition for tracers: ln_tra_dmp is set to .false.'
306	ln_tra_dmp(ib_bdy)=.false.
307	ELSEIF ( cn_tra(ib_bdy) == 'frs' ) THEN
308	CALL ctl_stop( 'Use FRS OR relaxation' )
309	ELSE
310	IF(lwp) WRITE(numout,*) ' + T/S relaxation zone'
311	IF(lwp) WRITE(numout,*) ' Damping time scale: ',rn_time_dmp(ib_bdy),' days'
312	IF(lwp) WRITE(numout,*) ' Outflow damping time scale: ',rn_time_dmp_out(ib_bdy),' days'
313	IF((lwp).AND.rn_time_dmp(ib_bdy)<0) CALL ctl_stop( 'Time scale must be positive' )
314	dta_bdy(ib_bdy)%ll_tem = .true.
315	dta_bdy(ib_bdy)%ll_sal = .true.
316	ENDIF
317	ELSE
318	IF(lwp) WRITE(numout,*) ' NO T/S relaxation'
319	ENDIF
320	IF(lwp) WRITE(numout,*)
321
322	#if defined key_lim2
323	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
324	SELECT CASE( cn_ice_lim(ib_bdy) )
325	CASE('none')
326	IF(lwp) WRITE(numout,*) ' no open boundary condition'
327	dta_bdy(ib_bdy)%ll_frld = .false.
328	dta_bdy(ib_bdy)%ll_hicif = .false.
329	dta_bdy(ib_bdy)%ll_hsnif = .false.
330	CASE('frs')
331	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
332	dta_bdy(ib_bdy)%ll_frld = .true.
333	dta_bdy(ib_bdy)%ll_hicif = .true.
334	dta_bdy(ib_bdy)%ll_hsnif = .true.
335	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_ice_lim' )
336	END SELECT
337	IF( cn_ice_lim(ib_bdy) /= 'none' ) THEN
338	SELECT CASE( nn_ice_lim_dta(ib_bdy) ) !
339	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
340	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
341	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_lim_dta must be 0 or 1' )
342	END SELECT
343	ENDIF
344	IF(lwp) WRITE(numout,*)
345	#elif defined key_lim3
346	IF(lwp) WRITE(numout,*) 'Boundary conditions for sea ice: '
347	SELECT CASE( cn_ice_lim(ib_bdy) )
348	CASE('none')
349	IF(lwp) WRITE(numout,*) ' no open boundary condition'
350	dta_bdy(ib_bdy)%ll_a_i = .false.
351	dta_bdy(ib_bdy)%ll_ht_i = .false.
352	dta_bdy(ib_bdy)%ll_ht_s = .false.
353	CASE('frs')
354	IF(lwp) WRITE(numout,*) ' Flow Relaxation Scheme'
355	dta_bdy(ib_bdy)%ll_a_i = .true.
356	dta_bdy(ib_bdy)%ll_ht_i = .true.
357	dta_bdy(ib_bdy)%ll_ht_s = .true.
358	CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for cn_ice_lim' )
359	END SELECT
360	IF( cn_ice_lim(ib_bdy) /= 'none' ) THEN
361	SELECT CASE( nn_ice_lim_dta(ib_bdy) ) !
362	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' initial state used for bdy data'
363	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' boundary data taken from file'
364	CASE DEFAULT ; CALL ctl_stop( 'nn_ice_lim_dta must be 0 or 1' )
365	END SELECT
366	ENDIF
367	IF(lwp) WRITE(numout,*)
368	IF(lwp) WRITE(numout,*) ' tem of bdy sea-ice = ', rn_ice_tem(ib_bdy)
369	IF(lwp) WRITE(numout,*) ' sal of bdy sea-ice = ', rn_ice_sal(ib_bdy)
370	IF(lwp) WRITE(numout,*) ' age of bdy sea-ice = ', rn_ice_age(ib_bdy)
371	#endif
372
373	IF(lwp) WRITE(numout,*) ' Width of relaxation zone = ', nn_rimwidth(ib_bdy)
374	IF(lwp) WRITE(numout,*)
375
376	ENDDO
377
378	IF (nb_bdy .gt. 0) THEN
379	IF( ln_vol ) THEN ! check volume conservation (nn_volctl value)
380	IF(lwp) WRITE(numout,*) 'Volume correction applied at open boundaries'
381	IF(lwp) WRITE(numout,*)
382	SELECT CASE ( nn_volctl )
383	CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' The total volume will be constant'
384	CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' The total volume will vary according to the surface E-P flux'
385	CASE DEFAULT ; CALL ctl_stop( 'nn_volctl must be 0 or 1' )
386	END SELECT
387	IF(lwp) WRITE(numout,*)
388	ELSE
389	IF(lwp) WRITE(numout,*) 'No volume correction applied at open boundaries'
390	IF(lwp) WRITE(numout,*)
391	ENDIF
392	ENDIF
393
394	! -------------------------------------------------
395	! Initialise indices arrays for open boundaries
396	! -------------------------------------------------
397
398	! Work out global dimensions of boundary data
399	! ---------------------------------------------
400	REWIND( numnam_cfg )
401
402	!!----------------------------------------------------------------------
403
404
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	!! REWIND( numnam_ref ) ! Namelist nambdy_index in reference namelist : Open boundaries indexes
424	!! READ ( numnam_ref, namrun, IOSTAT = ios, ERR = 903)
425	!!903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in reference namelist', lwp )
426
427	!! REWIND( numnam_cfg ) ! Namelist nambdy_index in configuration namelist : Open boundaries indexes
428	READ ( numnam_cfg, nambdy_index, IOSTAT = ios, ERR = 904 )
429	904 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy_index in configuration namelist', lwp )
430	IF(lwm) WRITE ( numond, nambdy_index )
431
432	SELECT CASE ( TRIM(ctypebdy) )
433	CASE( 'N' )
434	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
435	nbdyind = jpjglo - 2 ! set boundary to whole side of model domain.
436	nbdybeg = 2
437	nbdyend = jpiglo - 1
438	ENDIF
439	nbdysegn = nbdysegn + 1
440	npckgn(nbdysegn) = ib_bdy ! Save bdy package number
441	jpjnob(nbdysegn) = nbdyind
442	jpindt(nbdysegn) = nbdybeg
443	jpinft(nbdysegn) = nbdyend
444	!
445	CASE( 'S' )
446	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
447	nbdyind = 2 ! set boundary to whole side of model domain.
448	nbdybeg = 2
449	nbdyend = jpiglo - 1
450	ENDIF
451	nbdysegs = nbdysegs + 1
452	npckgs(nbdysegs) = ib_bdy ! Save bdy package number
453	jpjsob(nbdysegs) = nbdyind
454	jpisdt(nbdysegs) = nbdybeg
455	jpisft(nbdysegs) = nbdyend
456	!
457	CASE( 'E' )
458	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
459	nbdyind = jpiglo - 2 ! set boundary to whole side of model domain.
460	nbdybeg = 2
461	nbdyend = jpjglo - 1
462	ENDIF
463	nbdysege = nbdysege + 1
464	npckge(nbdysege) = ib_bdy ! Save bdy package number
465	jpieob(nbdysege) = nbdyind
466	jpjedt(nbdysege) = nbdybeg
467	jpjeft(nbdysege) = nbdyend
468	!
469	CASE( 'W' )
470	IF( nbdyind == -1 ) THEN ! Automatic boundary definition: if nbdysegX = -1
471	nbdyind = 2 ! set boundary to whole side of model domain.
472	nbdybeg = 2
473	nbdyend = jpjglo - 1
474	ENDIF
475	nbdysegw = nbdysegw + 1
476	npckgw(nbdysegw) = ib_bdy ! Save bdy package number
477	jpiwob(nbdysegw) = nbdyind
478	jpjwdt(nbdysegw) = nbdybeg
479	jpjwft(nbdysegw) = nbdyend
480	!
481	CASE DEFAULT ; CALL ctl_stop( 'ctypebdy must be N, S, E or W' )
482	END SELECT
483
484	! For simplicity we assume that in case of straight bdy, arrays have the same length
485	! (even if it is true that last tangential velocity points
486	! are useless). This simplifies a little bit boundary data format (and agrees with format
487	! used so far in obc package)
488
489	nblendta(1:jpbgrd,ib_bdy) = (nbdyend - nbdybeg + 1) * nn_rimwidth(ib_bdy)
490	jpbdtas = MAX(jpbdtas, (nbdyend - nbdybeg + 1))
491	IF (lwp.and.(nn_rimwidth(ib_bdy)>nrimmax)) &
492	& CALL ctl_stop( 'rimwidth must be lower than nrimmax' )
493
494	ELSE ! Read size of arrays in boundary coordinates file.
495	CALL iom_open( cn_coords_file(ib_bdy), inum )
496	DO igrd = 1, jpbgrd
497	id_dummy = iom_varid( inum, 'nbi'//cgrid(igrd), kdimsz=kdimsz )
498	!clem nblendta(igrd,ib_bdy) = kdimsz(1)
499	!clem jpbdtau = MAX(jpbdtau, kdimsz(1))
500	nblendta(igrd,ib_bdy) = MAXVAL(kdimsz)
501	jpbdtau = MAX(jpbdtau, MAXVAL(kdimsz))
502	ENDDO
503	CALL iom_close( inum )
504
505	ENDIF
506
507	ENDDO ! ib_bdy
508
509	IF (nb_bdy>0) THEN
510	jpbdta = MAXVAL(nblendta(1:jpbgrd,1:nb_bdy))
511
512	! Allocate arrays
513	!---------------
514	ALLOCATE( nbidta(jpbdta, jpbgrd, nb_bdy), nbjdta(jpbdta, jpbgrd, nb_bdy), &
515	& nbrdta(jpbdta, jpbgrd, nb_bdy) )
516
517	ALLOCATE( dta_global(jpbdtau, 1, jpk) )
518	IF ( icount>0 ) ALLOCATE( dta_global2(jpbdtas, nrimmax, jpk) )
519	!
520	ENDIF
521
522	! Now look for crossings in user (namelist) defined open boundary segments:
523	!--------------------------------------------------------------------------
524	IF ( icount>0 ) CALL bdy_ctl_seg
525
526	! Calculate global boundary index arrays or read in from file
527	!------------------------------------------------------------
528	! 1. Read global index arrays from boundary coordinates file.
529	DO ib_bdy = 1, nb_bdy
530
531	IF( ln_coords_file(ib_bdy) ) THEN
532
533	CALL iom_open( cn_coords_file(ib_bdy), inum )
534	DO igrd = 1, jpbgrd
535	CALL iom_get( inum, jpdom_unknown, 'nbi'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
536	DO ii = 1,nblendta(igrd,ib_bdy)
537	nbidta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
538	END DO
539	CALL iom_get( inum, jpdom_unknown, 'nbj'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
540	DO ii = 1,nblendta(igrd,ib_bdy)
541	nbjdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
542	END DO
543	CALL iom_get( inum, jpdom_unknown, 'nbr'//cgrid(igrd), dta_global(1:nblendta(igrd,ib_bdy),:,1) )
544	DO ii = 1,nblendta(igrd,ib_bdy)
545	nbrdta(ii,igrd,ib_bdy) = INT( dta_global(ii,1,1) )
546	END DO
547
548	ibr_max = MAXVAL( nbrdta(:,igrd,ib_bdy) )
549	IF(lwp) WRITE(numout,*)
550	IF(lwp) WRITE(numout,*) ' Maximum rimwidth in file is ', ibr_max
551	IF(lwp) WRITE(numout,*) ' nn_rimwidth from namelist is ', nn_rimwidth(ib_bdy)
552	IF (ibr_max < nn_rimwidth(ib_bdy)) &
553	CALL ctl_stop( 'nn_rimwidth is larger than maximum rimwidth in file',cn_coords_file(ib_bdy) )
554	END DO
555	CALL iom_close( inum )
556
557	ENDIF
558
559	ENDDO
560
561	! 2. Now fill indices corresponding to straight open boundary arrays:
562	! East
563	!-----
564	DO iseg = 1, nbdysege
565	ib_bdy = npckge(iseg)
566	!
567	! ------------ T points -------------
568	igrd=1
569	icount=0
570	DO ir = 1, nn_rimwidth(ib_bdy)
571	DO ij = jpjedt(iseg), jpjeft(iseg)
572	icount = icount + 1
573	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
574	nbjdta(icount, igrd, ib_bdy) = ij
575	nbrdta(icount, igrd, ib_bdy) = ir
576	ENDDO
577	ENDDO
578	!
579	! ------------ U points -------------
580	igrd=2
581	icount=0
582	DO ir = 1, nn_rimwidth(ib_bdy)
583	DO ij = jpjedt(iseg), jpjeft(iseg)
584	icount = icount + 1
585	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 1 - ir
586	nbjdta(icount, igrd, ib_bdy) = ij
587	nbrdta(icount, igrd, ib_bdy) = ir
588	ENDDO
589	ENDDO
590	!
591	! ------------ V points -------------
592	igrd=3
593	icount=0
594	DO ir = 1, nn_rimwidth(ib_bdy)
595	! DO ij = jpjedt(iseg), jpjeft(iseg) - 1
596	DO ij = jpjedt(iseg), jpjeft(iseg)
597	icount = icount + 1
598	nbidta(icount, igrd, ib_bdy) = jpieob(iseg) + 2 - ir
599	nbjdta(icount, igrd, ib_bdy) = ij
600	nbrdta(icount, igrd, ib_bdy) = ir
601	ENDDO
602	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
603	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
604	ENDDO
605	ENDDO
606	!
607	! West
608	!-----
609	DO iseg = 1, nbdysegw
610	ib_bdy = npckgw(iseg)
611	!
612	! ------------ T points -------------
613	igrd=1
614	icount=0
615	DO ir = 1, nn_rimwidth(ib_bdy)
616	DO ij = jpjwdt(iseg), jpjwft(iseg)
617	icount = icount + 1
618	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
619	nbjdta(icount, igrd, ib_bdy) = ij
620	nbrdta(icount, igrd, ib_bdy) = ir
621	ENDDO
622	ENDDO
623	!
624	! ------------ U points -------------
625	igrd=2
626	icount=0
627	DO ir = 1, nn_rimwidth(ib_bdy)
628	DO ij = jpjwdt(iseg), jpjwft(iseg)
629	icount = icount + 1
630	nbidta(icount, igrd, ib_bdy) = jpiwob(iseg) + ir - 1
631	nbjdta(icount, igrd, ib_bdy) = ij
632	nbrdta(icount, igrd, ib_bdy) = ir
633	ENDDO
634	ENDDO
635	!
636	! ------------ V points -------------
637	igrd=3
638	icount=0
639	DO ir = 1, nn_rimwidth(ib_bdy)
640	! DO ij = jpjwdt(iseg), jpjwft(iseg) - 1
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	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
648	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
649	ENDDO
650	ENDDO
651	!
652	! North
653	!-----
654	DO iseg = 1, nbdysegn
655	ib_bdy = npckgn(iseg)
656	!
657	! ------------ T points -------------
658	igrd=1
659	icount=0
660	DO ir = 1, nn_rimwidth(ib_bdy)
661	DO ii = jpindt(iseg), jpinft(iseg)
662	icount = icount + 1
663	nbidta(icount, igrd, ib_bdy) = ii
664	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 2 - ir
665	nbrdta(icount, igrd, ib_bdy) = ir
666	ENDDO
667	ENDDO
668	!
669	! ------------ U points -------------
670	igrd=2
671	icount=0
672	DO ir = 1, nn_rimwidth(ib_bdy)
673	! DO ii = jpindt(iseg), jpinft(iseg) - 1
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	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
681	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
682	ENDDO
683	!
684	! ------------ V points -------------
685	igrd=3
686	icount=0
687	DO ir = 1, nn_rimwidth(ib_bdy)
688	DO ii = jpindt(iseg), jpinft(iseg)
689	icount = icount + 1
690	nbidta(icount, igrd, ib_bdy) = ii
691	nbjdta(icount, igrd, ib_bdy) = jpjnob(iseg) + 1 - ir
692	nbrdta(icount, igrd, ib_bdy) = ir
693	ENDDO
694	ENDDO
695	ENDDO
696	!
697	! South
698	!-----
699	DO iseg = 1, nbdysegs
700	ib_bdy = npckgs(iseg)
701	!
702	! ------------ T points -------------
703	igrd=1
704	icount=0
705	DO ir = 1, nn_rimwidth(ib_bdy)
706	DO ii = jpisdt(iseg), jpisft(iseg)
707	icount = icount + 1
708	nbidta(icount, igrd, ib_bdy) = ii
709	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
710	nbrdta(icount, igrd, ib_bdy) = ir
711	ENDDO
712	ENDDO
713	!
714	! ------------ U points -------------
715	igrd=2
716	icount=0
717	DO ir = 1, nn_rimwidth(ib_bdy)
718	! DO ii = jpisdt(iseg), jpisft(iseg) - 1
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	nbidta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
726	nbjdta(icount, igrd, ib_bdy) = -ib_bdy ! Discount this point
727	ENDDO
728	!
729	! ------------ V points -------------
730	igrd=3
731	icount=0
732	DO ir = 1, nn_rimwidth(ib_bdy)
733	DO ii = jpisdt(iseg), jpisft(iseg)
734	icount = icount + 1
735	nbidta(icount, igrd, ib_bdy) = ii
736	nbjdta(icount, igrd, ib_bdy) = jpjsob(iseg) + ir - 1
737	nbrdta(icount, igrd, ib_bdy) = ir
738	ENDDO
739	ENDDO
740	ENDDO
741
742	! Deal with duplicated points
743	!-----------------------------
744	! We assign negative indices to duplicated points (to remove them from bdy points to be updated)
745	! if their distance to the bdy is greater than the other
746	! If their distance are the same, just keep only one to avoid updating a point twice
747	DO igrd = 1, jpbgrd
748	DO ib_bdy1 = 1, nb_bdy
749	DO ib_bdy2 = 1, nb_bdy
750	IF (ib_bdy1/=ib_bdy2) THEN
751	DO ib1 = 1, nblendta(igrd,ib_bdy1)
752	DO ib2 = 1, nblendta(igrd,ib_bdy2)
753	IF ((nbidta(ib1, igrd, ib_bdy1)==nbidta(ib2, igrd, ib_bdy2)).AND. &
754	& (nbjdta(ib1, igrd, ib_bdy1)==nbjdta(ib2, igrd, ib_bdy2))) THEN
755	! IF ((lwp).AND.(igrd==1)) WRITE(numout,*) ' found coincident point ji, jj:', &
756	! & nbidta(ib1, igrd, ib_bdy1), &
757	! & nbjdta(ib2, igrd, ib_bdy2)
758	! keep only points with the lowest distance to boundary:
759	IF (nbrdta(ib1, igrd, ib_bdy1)<nbrdta(ib2, igrd, ib_bdy2)) THEN
760	nbidta(ib2, igrd, ib_bdy2) =-ib_bdy2
761	nbjdta(ib2, igrd, ib_bdy2) =-ib_bdy2
762	ELSEIF (nbrdta(ib1, igrd, ib_bdy1)>nbrdta(ib2, igrd, ib_bdy2)) THEN
763	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
764	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
765	! Arbitrary choice if distances are the same:
766	ELSE
767	nbidta(ib1, igrd, ib_bdy1) =-ib_bdy1
768	nbjdta(ib1, igrd, ib_bdy1) =-ib_bdy1
769	ENDIF
770	END IF
771	END DO
772	END DO
773	ENDIF
774	END DO
775	END DO
776	END DO
777
778	! Work out dimensions of boundary data on each processor
779	! ------------------------------------------------------
780
781	! Rather assume that boundary data indices are given on global domain
782	! TO BE DISCUSSED ?
783	! iw = mig(1) + 1 ! if monotasking and no zoom, iw=2
784	! ie = mig(1) + nlci-1 - 1 ! if monotasking and no zoom, ie=jpim1
785	! is = mjg(1) + 1 ! if monotasking and no zoom, is=2
786	! in = mjg(1) + nlcj-1 - 1 ! if monotasking and no zoom, in=jpjm1
787	iwe = mig(1) - jpizoom + 2 ! if monotasking and no zoom, iw=2
788	ies = mig(1) + nlci - jpizoom - 1 ! if monotasking and no zoom, ie=jpim1
789	iso = mjg(1) - jpjzoom + 2 ! if monotasking and no zoom, is=2
790	ino = mjg(1) + nlcj - jpjzoom - 1 ! if monotasking and no zoom, in=jpjm1
791
792	ALLOCATE( nbondi_bdy(nb_bdy))
793	ALLOCATE( nbondj_bdy(nb_bdy))
794	nbondi_bdy(:)=2
795	nbondj_bdy(:)=2
796	ALLOCATE( nbondi_bdy_b(nb_bdy))
797	ALLOCATE( nbondj_bdy_b(nb_bdy))
798	nbondi_bdy_b(:)=2
799	nbondj_bdy_b(:)=2
800
801	! Work out dimensions of boundary data on each neighbour process
802	IF(nbondi .eq. 0) THEN
803	iw_b(1) = jpizoom + nimppt(nowe+1)
804	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
805	is_b(1) = jpjzoom + njmppt(nowe+1)
806	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
807
808	iw_b(2) = jpizoom + nimppt(noea+1)
809	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
810	is_b(2) = jpjzoom + njmppt(noea+1)
811	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
812	ELSEIF(nbondi .eq. 1) THEN
813	iw_b(1) = jpizoom + nimppt(nowe+1)
814	ie_b(1) = jpizoom + nimppt(nowe+1)+nlcit(nowe+1)-3
815	is_b(1) = jpjzoom + njmppt(nowe+1)
816	in_b(1) = jpjzoom + njmppt(nowe+1)+nlcjt(nowe+1)-3
817	ELSEIF(nbondi .eq. -1) THEN
818	iw_b(2) = jpizoom + nimppt(noea+1)
819	ie_b(2) = jpizoom + nimppt(noea+1)+nlcit(noea+1)-3
820	is_b(2) = jpjzoom + njmppt(noea+1)
821	in_b(2) = jpjzoom + njmppt(noea+1)+nlcjt(noea+1)-3
822	ENDIF
823
824	IF(nbondj .eq. 0) THEN
825	iw_b(3) = jpizoom + nimppt(noso+1)
826	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
827	is_b(3) = jpjzoom + njmppt(noso+1)
828	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
829
830	iw_b(4) = jpizoom + nimppt(nono+1)
831	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
832	is_b(4) = jpjzoom + njmppt(nono+1)
833	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
834	ELSEIF(nbondj .eq. 1) THEN
835	iw_b(3) = jpizoom + nimppt(noso+1)
836	ie_b(3) = jpizoom + nimppt(noso+1)+nlcit(noso+1)-3
837	is_b(3) = jpjzoom + njmppt(noso+1)
838	in_b(3) = jpjzoom + njmppt(noso+1)+nlcjt(noso+1)-3
839	ELSEIF(nbondj .eq. -1) THEN
840	iw_b(4) = jpizoom + nimppt(nono+1)
841	ie_b(4) = jpizoom + nimppt(nono+1)+nlcit(nono+1)-3
842	is_b(4) = jpjzoom + njmppt(nono+1)
843	in_b(4) = jpjzoom + njmppt(nono+1)+nlcjt(nono+1)-3
844	ENDIF
845
846	DO ib_bdy = 1, nb_bdy
847	DO igrd = 1, jpbgrd
848	icount = 0
849	icountr = 0
850	idx_bdy(ib_bdy)%nblen(igrd) = 0
851	idx_bdy(ib_bdy)%nblenrim(igrd) = 0
852	DO ib = 1, nblendta(igrd,ib_bdy)
853	! check that data is in correct order in file
854	ibm1 = MAX(1,ib-1)
855	IF(lwp) THEN ! Since all procs read global data only need to do this check on one proc...
856	IF( nbrdta(ib,igrd,ib_bdy) < nbrdta(ibm1,igrd,ib_bdy) ) THEN
857	CALL ctl_stop('bdy_init : ERROR : boundary data in file must be defined ', &
858	& ' in order of distance from edge nbr A utility for re-ordering ', &
859	& ' boundary coordinates and data files exists in the TOOLS/OBC directory')
860	ENDIF
861	ENDIF
862	! check if point is in local domain
863	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
864	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino ) THEN
865	!
866	icount = icount + 1
867	!
868	IF( nbrdta(ib,igrd,ib_bdy) == 1 ) icountr = icountr+1
869	ENDIF
870	ENDDO
871	idx_bdy(ib_bdy)%nblenrim(igrd) = icountr !: length of rim boundary data on each proc
872	idx_bdy(ib_bdy)%nblen (igrd) = icount !: length of boundary data on each proc
873	ENDDO ! igrd
874
875	! Allocate index arrays for this boundary set
876	!--------------------------------------------
877	ilen1 = MAXVAL(idx_bdy(ib_bdy)%nblen(:))
878	ALLOCATE( idx_bdy(ib_bdy)%nbi(ilen1,jpbgrd) )
879	ALLOCATE( idx_bdy(ib_bdy)%nbj(ilen1,jpbgrd) )
880	ALLOCATE( idx_bdy(ib_bdy)%nbr(ilen1,jpbgrd) )
881	ALLOCATE( idx_bdy(ib_bdy)%nbd(ilen1,jpbgrd) )
882	ALLOCATE( idx_bdy(ib_bdy)%nbdout(ilen1,jpbgrd) )
883	ALLOCATE( idx_bdy(ib_bdy)%nbmap(ilen1,jpbgrd) )
884	ALLOCATE( idx_bdy(ib_bdy)%nbw(ilen1,jpbgrd) )
885	ALLOCATE( idx_bdy(ib_bdy)%flagu(ilen1,jpbgrd) )
886	ALLOCATE( idx_bdy(ib_bdy)%flagv(ilen1,jpbgrd) )
887
888	! Dispatch mapping indices and discrete distances on each processor
889	! -----------------------------------------------------------------
890
891	com_east = 0
892	com_west = 0
893	com_south = 0
894	com_north = 0
895
896	com_east_b = 0
897	com_west_b = 0
898	com_south_b = 0
899	com_north_b = 0
900
901	DO igrd = 1, jpbgrd
902	icount = 0
903	! Loop on rimwidth to ensure outermost points come first in the local arrays.
904	DO ir=1, nn_rimwidth(ib_bdy)
905	DO ib = 1, nblendta(igrd,ib_bdy)
906	! check if point is in local domain and equals ir
907	IF( nbidta(ib,igrd,ib_bdy) >= iwe .AND. nbidta(ib,igrd,ib_bdy) <= ies .AND. &
908	& nbjdta(ib,igrd,ib_bdy) >= iso .AND. nbjdta(ib,igrd,ib_bdy) <= ino .AND. &
909	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
910	!
911	icount = icount + 1
912
913	! Rather assume that boundary data indices are given on global domain
914	! TO BE DISCUSSED ?
915	! idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+1
916	! idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+1
917	idx_bdy(ib_bdy)%nbi(icount,igrd) = nbidta(ib,igrd,ib_bdy)- mig(1)+jpizoom
918	idx_bdy(ib_bdy)%nbj(icount,igrd) = nbjdta(ib,igrd,ib_bdy)- mjg(1)+jpjzoom
919	! check if point has to be sent
920	ii = idx_bdy(ib_bdy)%nbi(icount,igrd)
921	ij = idx_bdy(ib_bdy)%nbj(icount,igrd)
922	if((com_east .ne. 1) .and. (ii .eq. (nlci-1)) .and. (nbondi .le. 0)) then
923	com_east = 1
924	elseif((com_west .ne. 1) .and. (ii .eq. 2) .and. (nbondi .ge. 0) .and. (nbondi .ne. 2)) then
925	com_west = 1
926	endif
927	if((com_south .ne. 1) .and. (ij .eq. 2) .and. (nbondj .ge. 0) .and. (nbondj .ne. 2)) then
928	com_south = 1
929	elseif((com_north .ne. 1) .and. (ij .eq. (nlcj-1)) .and. (nbondj .le. 0)) then
930	com_north = 1
931	endif
932	idx_bdy(ib_bdy)%nbr(icount,igrd) = nbrdta(ib,igrd,ib_bdy)
933	idx_bdy(ib_bdy)%nbmap(icount,igrd) = ib
934	ENDIF
935	! check if point has to be received from a neighbour
936	IF(nbondi .eq. 0) THEN
937	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
938	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
939	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
940	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
941	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
942	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
943	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
944	com_south = 1
945	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
946	com_north = 1
947	endif
948	com_west_b = 1
949	endif
950	ENDIF
951	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
952	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
953	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
954	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
955	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
956	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
957	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
958	com_south = 1
959	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
960	com_north = 1
961	endif
962	com_east_b = 1
963	endif
964	ENDIF
965	ELSEIF(nbondi .eq. 1) THEN
966	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(1) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(1) .AND. &
967	& nbjdta(ib,igrd,ib_bdy) >= is_b(1) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(1) .AND. &
968	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
969	ii = nbidta(ib,igrd,ib_bdy)- iw_b(1)+2
970	if((com_west_b .ne. 1) .and. (ii .eq. (nlcit(nowe+1)-1))) then
971	ij = nbjdta(ib,igrd,ib_bdy) - is_b(1)+2
972	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
973	com_south = 1
974	elseif((ij .eq. nlcjt(nowe+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
975	com_north = 1
976	endif
977	com_west_b = 1
978	endif
979	ENDIF
980	ELSEIF(nbondi .eq. -1) THEN
981	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(2) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(2) .AND. &
982	& nbjdta(ib,igrd,ib_bdy) >= is_b(2) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(2) .AND. &
983	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
984	ii = nbidta(ib,igrd,ib_bdy)- iw_b(2)+2
985	if((com_east_b .ne. 1) .and. (ii .eq. 2)) then
986	ij = nbjdta(ib,igrd,ib_bdy) - is_b(2)+2
987	if((ij .eq. 2) .and. (nbondj .eq. 0 .or. nbondj .eq. 1)) then
988	com_south = 1
989	elseif((ij .eq. nlcjt(noea+1)-1) .and. (nbondj .eq. 0 .or. nbondj .eq. -1)) then
990	com_north = 1
991	endif
992	com_east_b = 1
993	endif
994	ENDIF
995	ENDIF
996	IF(nbondj .eq. 0) THEN
997	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
998	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
999	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1000	com_north_b = 1
1001	ENDIF
1002	IF(com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 &
1003	&.OR. nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1004	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1005	com_south_b = 1
1006	ENDIF
1007	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1008	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1009	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1010	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1011	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
1012	com_south_b = 1
1013	endif
1014	ENDIF
1015	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1016	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1017	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1018	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1019	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
1020	com_north_b = 1
1021	endif
1022	ENDIF
1023	ELSEIF(nbondj .eq. 1) THEN
1024	IF( com_south_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(3)-1 .OR. &
1025	& nbidta(ib,igrd,ib_bdy) == ie_b(3)+1) .AND. &
1026	& nbjdta(ib,igrd,ib_bdy) == in_b(3) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1027	com_south_b = 1
1028	ENDIF
1029	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(3) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(3) .AND. &
1030	& nbjdta(ib,igrd,ib_bdy) >= is_b(3) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(3) .AND. &
1031	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1032	ij = nbjdta(ib,igrd,ib_bdy)- is_b(3)+2
1033	if((com_south_b .ne. 1) .and. (ij .eq. (nlcjt(noso+1)-1))) then
1034	com_south_b = 1
1035	endif
1036	ENDIF
1037	ELSEIF(nbondj .eq. -1) THEN
1038	IF(com_north_b .ne. 1 .AND. (nbidta(ib,igrd,ib_bdy) == iw_b(4)-1 &
1039	& .OR. nbidta(ib,igrd,ib_bdy) == ie_b(4)+1) .AND. &
1040	& nbjdta(ib,igrd,ib_bdy) == is_b(4) .AND. nbrdta(ib,igrd,ib_bdy) == ir) THEN
1041	com_north_b = 1
1042	ENDIF
1043	IF( nbidta(ib,igrd,ib_bdy) >= iw_b(4) .AND. nbidta(ib,igrd,ib_bdy) <= ie_b(4) .AND. &
1044	& nbjdta(ib,igrd,ib_bdy) >= is_b(4) .AND. nbjdta(ib,igrd,ib_bdy) <= in_b(4) .AND. &
1045	& nbrdta(ib,igrd,ib_bdy) == ir ) THEN
1046	ij = nbjdta(ib,igrd,ib_bdy)- is_b(4)+2
1047	if((com_north_b .ne. 1) .and. (ij .eq. 2)) then
1048	com_north_b = 1
1049	endif
1050	ENDIF
1051	ENDIF
1052	ENDDO
1053	ENDDO
1054	ENDDO
1055
1056	! definition of the i- and j- direction local boundaries arrays
1057	! used for sending the boudaries
1058	IF((com_east .eq. 1) .and. (com_west .eq. 1)) THEN
1059	nbondi_bdy(ib_bdy) = 0
1060	ELSEIF ((com_east .eq. 1) .and. (com_west .eq. 0)) THEN
1061	nbondi_bdy(ib_bdy) = -1
1062	ELSEIF ((com_east .eq. 0) .and. (com_west .eq. 1)) THEN
1063	nbondi_bdy(ib_bdy) = 1
1064	ENDIF
1065
1066	IF((com_north .eq. 1) .and. (com_south .eq. 1)) THEN
1067	nbondj_bdy(ib_bdy) = 0
1068	ELSEIF ((com_north .eq. 1) .and. (com_south .eq. 0)) THEN
1069	nbondj_bdy(ib_bdy) = -1
1070	ELSEIF ((com_north .eq. 0) .and. (com_south .eq. 1)) THEN
1071	nbondj_bdy(ib_bdy) = 1
1072	ENDIF
1073
1074	! definition of the i- and j- direction local boundaries arrays
1075	! used for receiving the boudaries
1076	IF((com_east_b .eq. 1) .and. (com_west_b .eq. 1)) THEN
1077	nbondi_bdy_b(ib_bdy) = 0
1078	ELSEIF ((com_east_b .eq. 1) .and. (com_west_b .eq. 0)) THEN
1079	nbondi_bdy_b(ib_bdy) = -1
1080	ELSEIF ((com_east_b .eq. 0) .and. (com_west_b .eq. 1)) THEN
1081	nbondi_bdy_b(ib_bdy) = 1
1082	ENDIF
1083
1084	IF((com_north_b .eq. 1) .and. (com_south_b .eq. 1)) THEN
1085	nbondj_bdy_b(ib_bdy) = 0
1086	ELSEIF ((com_north_b .eq. 1) .and. (com_south_b .eq. 0)) THEN
1087	nbondj_bdy_b(ib_bdy) = -1
1088	ELSEIF ((com_north_b .eq. 0) .and. (com_south_b .eq. 1)) THEN
1089	nbondj_bdy_b(ib_bdy) = 1
1090	ENDIF
1091
1092	! Compute rim weights for FRS scheme
1093	! ----------------------------------
1094	DO igrd = 1, jpbgrd
1095	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1096	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1097	idx_bdy(ib_bdy)%nbw(ib,igrd) = 1.- TANH( FLOAT( nbr - 1 ) * 0.5 &
1098	& *(10./ FLOAT(nn_rimwidth(ib_bdy))) ) ! JGraham:modified for rim=15
1099	! idx_bdy(ib_bdy)%nbw(ib,igrd) = 1.- TANH( FLOAT( nbr - 1 ) *0.5 ) ! tanh formulation
1100	! idx_bdy(ib_bdy)%nbw(ib,igrd) = (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))**2. ! quadratic
1101	! idx_bdy(ib_bdy)%nbw(ib,igrd) = FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)) ! linear
1102	END DO
1103	END DO
1104
1105	! Compute damping coefficients
1106	! ----------------------------
1107	DO igrd = 1, jpbgrd
1108	DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd)
1109	nbr => idx_bdy(ib_bdy)%nbr(ib,igrd)
1110	idx_bdy(ib_bdy)%nbd(ib,igrd) = 1. / ( rn_time_dmp(ib_bdy) * rday ) &
1111	& (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))*2. ! quadratic
1112	idx_bdy(ib_bdy)%nbdout(ib,igrd) = 1. / ( rn_time_dmp_out(ib_bdy) * rday ) &
1113	& (FLOAT(nn_rimwidth(ib_bdy)+1-nbr)/FLOAT(nn_rimwidth(ib_bdy)))*2. ! quadratic
1114	END DO
1115	END DO
1116
1117	ENDDO
1118
1119	! ------------------------------------------------------
1120	! Initialise masks and find normal/tangential directions
1121	! ------------------------------------------------------
1122
1123	! Read global 2D mask at T-points: bdytmask
1124	! -----------------------------------------
1125	! bdytmask = 1 on the computational domain AND on open boundaries
1126	! = 0 elsewhere
1127
1128	IF( ln_mask_file ) THEN
1129	CALL iom_open( cn_mask_file, inum )
1130	CALL iom_get ( inum, jpdom_data, 'bdy_msk', bdytmask(:,:) )
1131	CALL iom_close( inum )
1132
1133	! Derive mask on U and V grid from mask on T grid
1134	bdyumask(:,:) = 0.e0
1135	bdyvmask(:,:) = 0.e0
1136	DO ij=1, jpjm1
1137	DO ii=1, jpim1
1138	bdyumask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii+1, ij )
1139	bdyvmask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii ,ij+1)
1140	END DO
1141	END DO
1142	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. ) ! Lateral boundary cond.
1143
1144
1145	! Mask corrections
1146	! ----------------
1147	DO ik = 1, jpkm1
1148	DO ij = 1, jpj
1149	DO ii = 1, jpi
1150	tmask(ii,ij,ik) = tmask(ii,ij,ik) * bdytmask(ii,ij)
1151	umask(ii,ij,ik) = umask(ii,ij,ik) * bdyumask(ii,ij)
1152	vmask(ii,ij,ik) = vmask(ii,ij,ik) * bdyvmask(ii,ij)
1153	bmask(ii,ij) = bmask(ii,ij) * bdytmask(ii,ij)
1154	END DO
1155	END DO
1156	END DO
1157
1158	DO ik = 1, jpkm1
1159	DO ij = 2, jpjm1
1160	DO ii = 2, jpim1
1161	fmask(ii,ij,ik) = fmask(ii,ij,ik) * bdytmask(ii,ij ) * bdytmask(ii+1,ij ) &
1162	& * bdytmask(ii,ij+1) * bdytmask(ii+1,ij+1)
1163	END DO
1164	END DO
1165	END DO
1166
1167	tmask_i (:,:) = ssmask(:,:) * tmask_i(:,:)
1168
1169	ENDIF ! ln_mask_file=.TRUE.
1170
1171	bdytmask(:,:) = ssmask(:,:)
1172	IF( .not. ln_mask_file ) THEN
1173	! If .not. ln_mask_file then we need to derive mask on U and V grid
1174	! from mask on T grid here.
1175	bdyumask(:,:) = 0.e0
1176	bdyvmask(:,:) = 0.e0
1177	DO ij=1, jpjm1
1178	DO ii=1, jpim1
1179	bdyumask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii+1, ij )
1180	bdyvmask(ii,ij)=bdytmask(ii,ij)*bdytmask(ii ,ij+1)
1181	END DO
1182	END DO
1183	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. ) ! Lateral boundary cond.
1184	ENDIF
1185
1186	! bdy masks and bmask are now set to zero on boundary points:
1187	igrd = 1 ! In the free surface case, bmask is at T-points
1188	DO ib_bdy = 1, nb_bdy
1189	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1190	bmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1191	ENDDO
1192	ENDDO
1193	!
1194	igrd = 1
1195	DO ib_bdy = 1, nb_bdy
1196	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1197	bdytmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1198	ENDDO
1199	ENDDO
1200	!
1201	igrd = 2
1202	DO ib_bdy = 1, nb_bdy
1203	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1204	bdyumask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1205	ENDDO
1206	ENDDO
1207	!
1208	igrd = 3
1209	DO ib_bdy = 1, nb_bdy
1210	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1211	bdyvmask(idx_bdy(ib_bdy)%nbi(ib,igrd), idx_bdy(ib_bdy)%nbj(ib,igrd)) = 0.e0
1212	ENDDO
1213	ENDDO
1214
1215	! For the flagu/flagv calculation below we require a version of fmask without
1216	! the land boundary condition (shlat) included:
1217	CALL wrk_alloc(jpi,jpj,zfmask)
1218	DO ij = 2, jpjm1
1219	DO ii = 2, jpim1
1220	zfmask(ii,ij) = tmask(ii,ij ,1) * tmask(ii+1,ij ,1) &
1221	& * tmask(ii,ij+1,1) * tmask(ii+1,ij+1,1)
1222	END DO
1223	END DO
1224
1225	! Lateral boundary conditions
1226	CALL lbc_lnk( zfmask , 'F', 1. )
1227	CALL lbc_lnk( fmask , 'F', 1. ) ; CALL lbc_lnk( bdytmask(:,:), 'T', 1. )
1228	CALL lbc_lnk( bdyumask(:,:), 'U', 1. ) ; CALL lbc_lnk( bdyvmask(:,:), 'V', 1. )
1229
1230	DO ib_bdy = 1, nb_bdy ! Indices and directions of rim velocity components
1231
1232	idx_bdy(ib_bdy)%flagu(:,:) = 0.e0
1233	idx_bdy(ib_bdy)%flagv(:,:) = 0.e0
1234	icount = 0
1235
1236	! Calculate relationship of U direction to the local orientation of the boundary
1237	! flagu = -1 : u component is normal to the dynamical boundary and its direction is outward
1238	! flagu = 0 : u is tangential
1239	! flagu = 1 : u is normal to the boundary and is direction is inward
1240
1241	DO igrd = 1,jpbgrd
1242	SELECT CASE( igrd )
1243	CASE( 1 )
1244	pmask => umask(:,:,1)
1245	i_offset = 0
1246	CASE( 2 )
1247	pmask => bdytmask
1248	i_offset = 1
1249	CASE( 3 )
1250	pmask => zfmask(:,:)
1251	i_offset = 0
1252	END SELECT
1253	icount = 0
1254	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1255	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1256	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1257	zefl = pmask(nbi+i_offset-1,nbj)
1258	zwfl = pmask(nbi+i_offset,nbj)
1259	! This error check only works if you are using the bdyXmask arrays
1260	IF( i_offset == 1 .and. zefl + zwfl == 2 ) THEN
1261	icount = icount + 1
1262	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(nbi),mjg(nbj)
1263	ELSE
1264	idx_bdy(ib_bdy)%flagu(ib,igrd) = -zefl + zwfl
1265	ENDIF
1266	END DO
1267	IF( icount /= 0 ) THEN
1268	IF(lwp) WRITE(numout,*)
1269	IF(lwp) WRITE(numout,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1270	' are not boundary points (flagu calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1271	IF(lwp) WRITE(numout,*) ' ========== '
1272	IF(lwp) WRITE(numout,*)
1273	nstop = nstop + 1
1274	ENDIF
1275	END DO
1276
1277	! Calculate relationship of V direction to the local orientation of the boundary
1278	! flagv = -1 : v component is normal to the dynamical boundary but its direction is outward
1279	! flagv = 0 : v is tangential
1280	! flagv = 1 : v is normal to the boundary and is direction is inward
1281
1282	DO igrd = 1,jpbgrd
1283	SELECT CASE( igrd )
1284	CASE( 1 )
1285	pmask => vmask(:,:,1)
1286	j_offset = 0
1287	CASE( 2 )
1288	pmask => zfmask(:,:)
1289	j_offset = 0
1290	CASE( 3 )
1291	pmask => bdytmask
1292	j_offset = 1
1293	END SELECT
1294	icount = 0
1295	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1296	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1297	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1298	znfl = pmask(nbi,nbj+j_offset-1 )
1299	zsfl = pmask(nbi,nbj+j_offset)
1300	! This error check only works if you are using the bdyXmask arrays
1301	IF( j_offset == 1 .and. znfl + zsfl == 2 ) THEN
1302	IF(lwp) WRITE(numout,*) 'Problem with igrd = ',igrd,' at (global) nbi, nbj : ',mig(nbi),mjg(nbj)
1303	icount = icount + 1
1304	ELSE
1305	idx_bdy(ib_bdy)%flagv(ib,igrd) = -znfl + zsfl
1306	END IF
1307	END DO
1308	IF( icount /= 0 ) THEN
1309	IF(lwp) WRITE(numout,*)
1310	IF(lwp) WRITE(numout,*) ' E R R O R : Some ',cgrid(igrd),' grid points,', &
1311	' are not boundary points (flagv calculation). Check nbi, nbj, indices for boundary set ',ib_bdy
1312	IF(lwp) WRITE(numout,*) ' ========== '
1313	IF(lwp) WRITE(numout,*)
1314	nstop = nstop + 1
1315	ENDIF
1316	END DO
1317
1318	END DO
1319
1320	! Compute total lateral surface for volume correction:
1321	! ----------------------------------------------------
1322	! JC: this must be done at each time step with key_vvl
1323	bdysurftot = 0.e0
1324	IF( ln_vol ) THEN
1325	igrd = 2 ! Lateral surface at U-points
1326	DO ib_bdy = 1, nb_bdy
1327	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1328	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1329	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1330	flagu => idx_bdy(ib_bdy)%flagu(ib,igrd)
1331	bdysurftot = bdysurftot + hu (nbi , nbj) &
1332	& * e2u (nbi , nbj) * ABS( flagu ) &
1333	& * tmask_i(nbi , nbj) &
1334	& * tmask_i(nbi+1, nbj)
1335	ENDDO
1336	ENDDO
1337
1338	igrd=3 ! Add lateral surface at V-points
1339	DO ib_bdy = 1, nb_bdy
1340	DO ib = 1, idx_bdy(ib_bdy)%nblenrim(igrd)
1341	nbi => idx_bdy(ib_bdy)%nbi(ib,igrd)
1342	nbj => idx_bdy(ib_bdy)%nbj(ib,igrd)
1343	flagv => idx_bdy(ib_bdy)%flagv(ib,igrd)
1344	bdysurftot = bdysurftot + hv (nbi, nbj ) &
1345	& * e1v (nbi, nbj ) * ABS( flagv ) &
1346	& * tmask_i(nbi, nbj ) &
1347	& * tmask_i(nbi, nbj+1)
1348	ENDDO
1349	ENDDO
1350	!
1351	IF( lk_mpp ) CALL mpp_sum( bdysurftot ) ! sum over the global domain
1352	END IF
1353	!
1354	! Tidy up
1355	!--------
1356	IF (nb_bdy>0) THEN
1357	DEALLOCATE(nbidta, nbjdta, nbrdta)
1358	ENDIF
1359
1360	CALL wrk_dealloc(jpi,jpj,zfmask)
1361
1362	IF( nn_timing == 1 ) CALL timing_stop('bdy_init')
1363
1364	END SUBROUTINE bdy_init
1365
1366	SUBROUTINE bdy_ctl_seg
1367	!!----------------------------------------------------------------------
1368	!! * ROUTINE bdy_ctl_seg *
1369	!!
1370	!! ** Purpose : Check straight open boundary segments location
1371	!!
1372	!! ** Method : - Look for open boundary corners
1373	!! - Check that segments start or end on land
1374	!!----------------------------------------------------------------------
1375	INTEGER :: ib, ib1, ib2, ji ,jj, itest
1376	INTEGER, DIMENSION(jp_nseg,2) :: icorne, icornw, icornn, icorns
1377	REAL(wp), DIMENSION(2) :: ztestmask
1378	!!----------------------------------------------------------------------
1379	!
1380	IF (lwp) WRITE(numout,*) ' '
1381	IF (lwp) WRITE(numout,*) 'bdy_ctl_seg: Check analytical segments'
1382	IF (lwp) WRITE(numout,*) '~~~~~~~~~~~~'
1383	!
1384	IF(lwp) WRITE(numout,*) 'Number of east segments : ', nbdysege
1385	IF(lwp) WRITE(numout,*) 'Number of west segments : ', nbdysegw
1386	IF(lwp) WRITE(numout,*) 'Number of north segments : ', nbdysegn
1387	IF(lwp) WRITE(numout,*) 'Number of south segments : ', nbdysegs
1388	! 1. Check bounds
1389	!----------------
1390	DO ib = 1, nbdysegn
1391	IF (lwp) WRITE(numout,) '*check north seg bounds pckg: ', npckgn(ib)
1392	IF ((jpjnob(ib).ge.jpjglo-1).or.&
1393	&(jpjnob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1394	IF (jpindt(ib).ge.jpinft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1395	IF (jpindt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1396	IF (jpinft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1397	END DO
1398	!
1399	DO ib = 1, nbdysegs
1400	IF (lwp) WRITE(numout,) '*check south seg bounds pckg: ', npckgs(ib)
1401	IF ((jpjsob(ib).ge.jpjglo-1).or.&
1402	&(jpjsob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1403	IF (jpisdt(ib).ge.jpisft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1404	IF (jpisdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1405	IF (jpisft(ib).ge.jpiglo) CALL ctl_stop( 'End index out of domain' )
1406	END DO
1407	!
1408	DO ib = 1, nbdysege
1409	IF (lwp) WRITE(numout,) '*check east seg bounds pckg: ', npckge(ib)
1410	IF ((jpieob(ib).ge.jpiglo-1).or.&
1411	&(jpieob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1412	IF (jpjedt(ib).ge.jpjeft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1413	IF (jpjedt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1414	IF (jpjeft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1415	END DO
1416	!
1417	DO ib = 1, nbdysegw
1418	IF (lwp) WRITE(numout,) '*check west seg bounds pckg: ', npckgw(ib)
1419	IF ((jpiwob(ib).ge.jpiglo-1).or.&
1420	&(jpiwob(ib).le.1)) CALL ctl_stop( 'nbdyind out of domain' )
1421	IF (jpjwdt(ib).ge.jpjwft(ib)) CALL ctl_stop( 'Bdy start index is greater than end index' )
1422	IF (jpjwdt(ib).le.1 ) CALL ctl_stop( 'Start index out of domain' )
1423	IF (jpjwft(ib).ge.jpjglo) CALL ctl_stop( 'End index out of domain' )
1424	ENDDO
1425	!
1426	!
1427	! 2. Look for segment crossings
1428	!------------------------------
1429	IF (lwp) WRITE(numout,) '*Look for segments corners :'
1430	!
1431	itest = 0 ! corner number
1432	!
1433	! flag to detect if start or end of open boundary belongs to a corner
1434	! if not (=0), it must be on land.
1435	! if a corner is detected, save bdy package number for further tests
1436	icorne(:,:)=0. ; icornw(:,:)=0. ; icornn(:,:)=0. ; icorns(:,:)=0.
1437	! South/West crossings
1438	IF ((nbdysegw > 0).AND.(nbdysegs > 0)) THEN
1439	DO ib1 = 1, nbdysegw
1440	DO ib2 = 1, nbdysegs
1441	IF (( jpisdt(ib2)<=jpiwob(ib1)).AND. &
1442	& ( jpisft(ib2)>=jpiwob(ib1)).AND. &
1443	& ( jpjwdt(ib1)<=jpjsob(ib2)).AND. &
1444	& ( jpjwft(ib1)>=jpjsob(ib2))) THEN
1445	IF ((jpjwdt(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpiwob(ib1))) THEN
1446	! We have a possible South-West corner
1447	! WRITE(numout,*) ' Found a South-West corner at (i,j): ', jpisdt(ib2), jpjwdt(ib1)
1448	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgs(ib2)
1449	icornw(ib1,1) = npckgs(ib2)
1450	icorns(ib2,1) = npckgw(ib1)
1451	ELSEIF ((jpisft(ib2)==jpiwob(ib1)).AND.(jpjwft(ib1)==jpjsob(ib2))) THEN
1452	IF(lwp) WRITE(numout,*)
1453	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1454	& jpisft(ib2), jpjwft(ib1)
1455	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1456	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1457	& ' and South segment: ',npckgs(ib2)
1458	IF(lwp) WRITE(numout,*)
1459	nstop = nstop + 1
1460	ELSE
1461	IF(lwp) WRITE(numout,*)
1462	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and West Open boundary indices'
1463	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1) , &
1464	& ' and South segment: ',npckgs(ib2)
1465	IF(lwp) WRITE(numout,*)
1466	nstop = nstop+1
1467	END IF
1468	END IF
1469	END DO
1470	END DO
1471	END IF
1472	!
1473	! South/East crossings
1474	IF ((nbdysege > 0).AND.(nbdysegs > 0)) THEN
1475	DO ib1 = 1, nbdysege
1476	DO ib2 = 1, nbdysegs
1477	IF (( jpisdt(ib2)<=jpieob(ib1)+1).AND. &
1478	& ( jpisft(ib2)>=jpieob(ib1)+1).AND. &
1479	& ( jpjedt(ib1)<=jpjsob(ib2) ).AND. &
1480	& ( jpjeft(ib1)>=jpjsob(ib2) )) THEN
1481	IF ((jpjedt(ib1)==jpjsob(ib2)).AND.(jpisft(ib2)==jpieob(ib1)+1)) THEN
1482	! We have a possible South-East corner
1483	! WRITE(numout,*) ' Found a South-East corner at (i,j): ', jpisft(ib2), jpjedt(ib1)
1484	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgs(ib2)
1485	icorne(ib1,1) = npckgs(ib2)
1486	icorns(ib2,2) = npckge(ib1)
1487	ELSEIF ((jpjeft(ib1)==jpjsob(ib2)).AND.(jpisdt(ib2)==jpieob(ib1)+1)) THEN
1488	IF(lwp) WRITE(numout,*)
1489	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1490	& jpisdt(ib2), jpjeft(ib1)
1491	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1492	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1493	& ' and South segment: ',npckgs(ib2)
1494	IF(lwp) WRITE(numout,*)
1495	nstop = nstop + 1
1496	ELSE
1497	IF(lwp) WRITE(numout,*)
1498	IF(lwp) WRITE(numout,*) ' E R R O R : Check South and East Open boundary indices'
1499	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1500	& ' and South segment: ',npckgs(ib2)
1501	IF(lwp) WRITE(numout,*)
1502	nstop = nstop + 1
1503	END IF
1504	END IF
1505	END DO
1506	END DO
1507	END IF
1508	!
1509	! North/West crossings
1510	IF ((nbdysegn > 0).AND.(nbdysegw > 0)) THEN
1511	DO ib1 = 1, nbdysegw
1512	DO ib2 = 1, nbdysegn
1513	IF (( jpindt(ib2)<=jpiwob(ib1) ).AND. &
1514	& ( jpinft(ib2)>=jpiwob(ib1) ).AND. &
1515	& ( jpjwdt(ib1)<=jpjnob(ib2)+1).AND. &
1516	& ( jpjwft(ib1)>=jpjnob(ib2)+1)) THEN
1517	IF ((jpjwft(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpiwob(ib1))) THEN
1518	! We have a possible North-West corner
1519	! WRITE(numout,*) ' Found a North-West corner at (i,j): ', jpindt(ib2), jpjwft(ib1)
1520	! WRITE(numout,*) ' between segments: ', npckgw(ib1), npckgn(ib2)
1521	icornw(ib1,2) = npckgn(ib2)
1522	icornn(ib2,1) = npckgw(ib1)
1523	ELSEIF ((jpjwdt(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpiwob(ib1))) THEN
1524	IF(lwp) WRITE(numout,*)
1525	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1526	& jpinft(ib2), jpjwdt(ib1)
1527	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1528	IF(lwp) WRITE(numout,*) ' Crossing problem with West segment: ',npckgw(ib1), &
1529	& ' and North segment: ',npckgn(ib2)
1530	IF(lwp) WRITE(numout,*)
1531	nstop = nstop + 1
1532	ELSE
1533	IF(lwp) WRITE(numout,*)
1534	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and West Open boundary indices'
1535	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with West segment: ',npckgw(ib1), &
1536	& ' and North segment: ',npckgn(ib2)
1537	IF(lwp) WRITE(numout,*)
1538	nstop = nstop + 1
1539	END IF
1540	END IF
1541	END DO
1542	END DO
1543	END IF
1544	!
1545	! North/East crossings
1546	IF ((nbdysegn > 0).AND.(nbdysege > 0)) THEN
1547	DO ib1 = 1, nbdysege
1548	DO ib2 = 1, nbdysegn
1549	IF (( jpindt(ib2)<=jpieob(ib1)+1).AND. &
1550	& ( jpinft(ib2)>=jpieob(ib1)+1).AND. &
1551	& ( jpjedt(ib1)<=jpjnob(ib2)+1).AND. &
1552	& ( jpjeft(ib1)>=jpjnob(ib2)+1)) THEN
1553	IF ((jpjeft(ib1)==jpjnob(ib2)+1).AND.(jpinft(ib2)==jpieob(ib1)+1)) THEN
1554	! We have a possible North-East corner
1555	! WRITE(numout,*) ' Found a North-East corner at (i,j): ', jpinft(ib2), jpjeft(ib1)
1556	! WRITE(numout,*) ' between segments: ', npckge(ib1), npckgn(ib2)
1557	icorne(ib1,2) = npckgn(ib2)
1558	icornn(ib2,2) = npckge(ib1)
1559	ELSEIF ((jpjedt(ib1)==jpjnob(ib2)+1).AND.(jpindt(ib2)==jpieob(ib1)+1)) THEN
1560	IF(lwp) WRITE(numout,*)
1561	IF(lwp) WRITE(numout,*) ' E R R O R : Found an acute open boundary corner at point (i,j)= ', &
1562	& jpindt(ib2), jpjedt(ib1)
1563	IF(lwp) WRITE(numout,*) ' ========== Not allowed yet'
1564	IF(lwp) WRITE(numout,*) ' Crossing problem with East segment: ',npckge(ib1), &
1565	& ' and North segment: ',npckgn(ib2)
1566	IF(lwp) WRITE(numout,*)
1567	nstop = nstop + 1
1568	ELSE
1569	IF(lwp) WRITE(numout,*)
1570	IF(lwp) WRITE(numout,*) ' E R R O R : Check North and East Open boundary indices'
1571	IF(lwp) WRITE(numout,*) ' ========== Crossing problem with East segment: ',npckge(ib1), &
1572	& ' and North segment: ',npckgn(ib2)
1573	IF(lwp) WRITE(numout,*)
1574	nstop = nstop + 1
1575	END IF
1576	END IF
1577	END DO
1578	END DO
1579	END IF
1580	!
1581	! 3. Check if segment extremities are on land
1582	!--------------------------------------------
1583	!
1584	! West segments
1585	DO ib = 1, nbdysegw
1586	! get mask at boundary extremities:
1587	ztestmask(1:2)=0.
1588	DO ji = 1, jpi
1589	DO jj = 1, jpj
1590	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1591	& ((jj + njmpp - 1) == jpjwdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1592	IF (((ji + nimpp - 1) == jpiwob(ib)).AND. &
1593	& ((jj + njmpp - 1) == jpjwft(ib))) ztestmask(2)=tmask(ji,jj,1)
1594	END DO
1595	END DO
1596	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1597
1598	IF (ztestmask(1)==1) THEN
1599	IF (icornw(ib,1)==0) THEN
1600	IF(lwp) WRITE(numout,*)
1601	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgw(ib)
1602	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1603	IF(lwp) WRITE(numout,*)
1604	nstop = nstop + 1
1605	ELSE
1606	! This is a corner
1607	IF(lwp) WRITE(numout,*) 'Found a South-West corner at (i,j): ', jpiwob(ib), jpjwdt(ib)
1608	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,1))
1609	itest=itest+1
1610	ENDIF
1611	ENDIF
1612	IF (ztestmask(2)==1) THEN
1613	IF (icornw(ib,2)==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 end 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 North-West corner at (i,j): ', jpiwob(ib), jpjwft(ib)
1622	CALL bdy_ctl_corn(npckgw(ib), icornw(ib,2))
1623	itest=itest+1
1624	ENDIF
1625	ENDIF
1626	END DO
1627	!
1628	! East segments
1629	DO ib = 1, nbdysege
1630	! get mask at boundary extremities:
1631	ztestmask(1:2)=0.
1632	DO ji = 1, jpi
1633	DO jj = 1, jpj
1634	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1635	& ((jj + njmpp - 1) == jpjedt(ib))) ztestmask(1)=tmask(ji,jj,1)
1636	IF (((ji + nimpp - 1) == jpieob(ib)+1).AND. &
1637	& ((jj + njmpp - 1) == jpjeft(ib))) ztestmask(2)=tmask(ji,jj,1)
1638	END DO
1639	END DO
1640	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1641
1642	IF (ztestmask(1)==1) THEN
1643	IF (icorne(ib,1)==0) THEN
1644	IF(lwp) WRITE(numout,*)
1645	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckge(ib)
1646	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1647	IF(lwp) WRITE(numout,*)
1648	nstop = nstop + 1
1649	ELSE
1650	! This is a corner
1651	IF(lwp) WRITE(numout,*) 'Found a South-East corner at (i,j): ', jpieob(ib)+1, jpjedt(ib)
1652	CALL bdy_ctl_corn(npckge(ib), icorne(ib,1))
1653	itest=itest+1
1654	ENDIF
1655	ENDIF
1656	IF (ztestmask(2)==1) THEN
1657	IF (icorne(ib,2)==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 end 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 North-East corner at (i,j): ', jpieob(ib)+1, jpjeft(ib)
1666	CALL bdy_ctl_corn(npckge(ib), icorne(ib,2))
1667	itest=itest+1
1668	ENDIF
1669	ENDIF
1670	END DO
1671	!
1672	! South segments
1673	DO ib = 1, nbdysegs
1674	! get mask at boundary extremities:
1675	ztestmask(1:2)=0.
1676	DO ji = 1, jpi
1677	DO jj = 1, jpj
1678	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1679	& ((ji + nimpp - 1) == jpisdt(ib))) ztestmask(1)=tmask(ji,jj,1)
1680	IF (((jj + njmpp - 1) == jpjsob(ib)).AND. &
1681	& ((ji + nimpp - 1) == jpisft(ib))) ztestmask(2)=tmask(ji,jj,1)
1682	END DO
1683	END DO
1684	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1685
1686	IF ((ztestmask(1)==1).AND.(icorns(ib,1)==0)) THEN
1687	IF(lwp) WRITE(numout,*)
1688	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1689	IF(lwp) WRITE(numout,*) ' ========== does not start on land or on a corner'
1690	IF(lwp) WRITE(numout,*)
1691	nstop = nstop + 1
1692	ENDIF
1693	IF ((ztestmask(2)==1).AND.(icorns(ib,2)==0)) THEN
1694	IF(lwp) WRITE(numout,*)
1695	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgs(ib)
1696	IF(lwp) WRITE(numout,*) ' ========== does not end on land or on a corner'
1697	IF(lwp) WRITE(numout,*)
1698	nstop = nstop + 1
1699	ENDIF
1700	END DO
1701	!
1702	! North segments
1703	DO ib = 1, nbdysegn
1704	! get mask at boundary extremities:
1705	ztestmask(1:2)=0.
1706	DO ji = 1, jpi
1707	DO jj = 1, jpj
1708	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1709	& ((ji + nimpp - 1) == jpindt(ib))) ztestmask(1)=tmask(ji,jj,1)
1710	IF (((jj + njmpp - 1) == jpjnob(ib)+1).AND. &
1711	& ((ji + nimpp - 1) == jpinft(ib))) ztestmask(2)=tmask(ji,jj,1)
1712	END DO
1713	END DO
1714	IF( lk_mpp ) CALL mpp_sum( ztestmask, 2 ) ! sum over the global domain
1715
1716	IF ((ztestmask(1)==1).AND.(icornn(ib,1)==0)) THEN
1717	IF(lwp) WRITE(numout,*)
1718	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1719	IF(lwp) WRITE(numout,*) ' ========== does not start on land'
1720	IF(lwp) WRITE(numout,*)
1721	nstop = nstop + 1
1722	ENDIF
1723	IF ((ztestmask(2)==1).AND.(icornn(ib,2)==0)) THEN
1724	IF(lwp) WRITE(numout,*)
1725	IF(lwp) WRITE(numout,*) ' E R R O R : Open boundary segment ', npckgn(ib)
1726	IF(lwp) WRITE(numout,*) ' ========== does not end on land'
1727	IF(lwp) WRITE(numout,*)
1728	nstop = nstop + 1
1729	ENDIF
1730	END DO
1731	!
1732	IF ((itest==0).AND.(lwp)) WRITE(numout,*) 'NO open boundary corner found'
1733	!
1734	! Other tests TBD:
1735	! segments completly on land
1736	! optimized open boundary array length according to landmask
1737	! Nudging layers that overlap with interior domain
1738	!
1739	END SUBROUTINE bdy_ctl_seg
1740
1741	SUBROUTINE bdy_ctl_corn( ib1, ib2 )
1742	!!----------------------------------------------------------------------
1743	!! * ROUTINE bdy_ctl_corn *
1744	!!
1745	!! ** Purpose : Check numerical schemes consistency between
1746	!! segments having a common corner
1747	!!
1748	!! ** Method :
1749	!!----------------------------------------------------------------------
1750	INTEGER, INTENT(in) :: ib1, ib2
1751	INTEGER :: itest
1752	!!----------------------------------------------------------------------
1753	itest = 0
1754
1755	IF (cn_dyn2d(ib1)/=cn_dyn2d(ib2)) itest = itest + 1
1756	IF (cn_dyn3d(ib1)/=cn_dyn3d(ib2)) itest = itest + 1
1757	IF (cn_tra(ib1)/=cn_tra(ib2)) itest = itest + 1
1758	!
1759	IF (nn_dyn2d_dta(ib1)/=nn_dyn2d_dta(ib2)) itest = itest + 1
1760	IF (nn_dyn3d_dta(ib1)/=nn_dyn3d_dta(ib2)) itest = itest + 1
1761	IF (nn_tra_dta(ib1)/=nn_tra_dta(ib2)) itest = itest + 1
1762	!
1763	IF (nn_rimwidth(ib1)/=nn_rimwidth(ib2)) itest = itest + 1
1764	!
1765	IF ( itest>0 ) THEN
1766	IF(lwp) WRITE(numout,*) ' E R R O R : Segments ', ib1, 'and ', ib2
1767	IF(lwp) WRITE(numout,*) ' ========== have different open bdy schemes'
1768	IF(lwp) WRITE(numout,*)
1769	nstop = nstop + 1
1770	ENDIF
1771	!
1772	END SUBROUTINE bdy_ctl_corn
1773
1774	#else
1775	!!---------------------------------------------------------------------------------
1776	!! Dummy module NO open boundaries
1777	!!---------------------------------------------------------------------------------
1778	CONTAINS
1779	SUBROUTINE bdy_init ! Dummy routine
1780	END SUBROUTINE bdy_init
1781	#endif
1782
1783	!!=================================================================================
1784	END MODULE bdyini

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