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bdydta.F90 in branches/DEV_r1986_BDY_updates/NEMO/OPA_SRC/BDY – NEMO

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source: branches/DEV_r1986_BDY_updates/NEMO/OPA_SRC/BDY/bdydta.F90 @ 2094

Last change on this file since 2094 was 2094, checked in by davestorkey, 14 years ago
Correction to bug fix.
Property svn:executable set to ``* Property svn:keywords set to `Id`
File size: 50.0 KB

Line
1	MODULE bdydta
2	!!======================================================================
3	!! * MODULE bdydta *
4	!! Open boundary data : read the data for the unstructured open boundaries.
5	!!======================================================================
6	!! History : 1.0 ! 2005-01 (J. Chanut, A. Sellar) Original code
7	!! - ! 2007-01 (D. Storkey) Update to use IOM module
8	!! - ! 2007-07 (D. Storkey) add bdy_dta_bt
9	!! 3.0 ! 2008-04 (NEMO team) add in the reference version
10	!! 3.3 ! 2010-09 (E.O'Dea) modifications for Shelf configurations
11	!! 3.3 ! 2010-09 (D.Storkey) add ice boundary conditions
12	!!----------------------------------------------------------------------
13	#if defined key_bdy
14	!!----------------------------------------------------------------------
15	!! 'key_bdy' Unstructured Open Boundary Conditions
16	!!----------------------------------------------------------------------
17	!! bdy_dta : read u, v, t, s data along open boundaries
18	!! bdy_dta_bt : read depth-mean velocities and elevation along open
19	!! boundaries
20	!!----------------------------------------------------------------------
21	USE oce ! ocean dynamics and tracers
22	USE dom_oce ! ocean space and time domain
23	USE phycst ! physical constants
24	USE bdy_oce ! ocean open boundary conditions
25	USE bdytides ! tidal forcing at boundaries
26	USE iom
27	USE ioipsl
28	USE in_out_manager ! I/O logical units
29	if defined key_lim2
30	USE ice_2
31	#endif
32
33	IMPLICIT NONE
34	PRIVATE
35
36	PUBLIC bdy_dta ! routines called by step.F90
37	PUBLIC bdy_dta_bt
38
39	INTEGER :: numbdyt, numbdyu, numbdyv !: logical units for T-, U-, & V-points data file, resp.
40	INTEGER :: ntimes_bdy !: exact number of time dumps in data files
41	INTEGER :: nbdy_b, nbdy_a !: record of bdy data file for before and after model time step
42	INTEGER :: numbdyt_bt, numbdyu_bt, numbdyv_bt !: logical unit for T-, U- & V-points data file, resp.
43	INTEGER :: ntimes_bdy_bt !: exact number of time dumps in data files
44	INTEGER :: nbdy_b_bt, nbdy_a_bt !: record of bdy data file for before and after model time step
45
46	INTEGER, DIMENSION (jpbtime) :: istep, istep_bt !: time array in seconds in each data file
47
48	REAL(wp) :: zoffset !: time offset between time origin in file & start time of model run
49
50	REAL(wp), DIMENSION(jpbdim,jpk,2) :: tbdydta, sbdydta !: time interpolated values of T and S bdy data
51	REAL(wp), DIMENSION(jpbdim,jpk,2) :: ubdydta, vbdydta !: time interpolated values of U and V bdy data
52	REAL(wp), DIMENSION(jpbdim,2) :: ubtbdydta, vbtbdydta !: Arrays used for time interpolation of bdy data
53	REAL(wp), DIMENSION(jpbdim,2) :: sshbdydta !: bdy data of ssh
54
55	#if defined key_lim2
56	REAL(wp), DIMENSION(jpbdim,2) :: frld_bdydta !: }
57	REAL(wp), DIMENSION(jpbdim,2) :: hicif_bdydta !: } Arrays used for time interpolation of bdy data for ice variables
58	REAL(wp), DIMENSION(jpbdim,2) :: hsnif_bdydta !: }
59	#endif
60
61	!!----------------------------------------------------------------------
62	!! NEMO/OPA 3.0 , LOCEAN-IPSL (2008)
63	!! $Id$
64	!! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt)
65	!!----------------------------------------------------------------------
66
67	CONTAINS
68
69	SUBROUTINE bdy_dta( kt )
70	!!----------------------------------------------------------------------
71	!! * SUBROUTINE bdy_dta *
72	!!
73	!! ** Purpose : Read unstructured boundary data for FRS condition.
74	!!
75	!! ** Method : At the first timestep, read in boundary data for two
76	!! times from the file and time-interpolate. At other
77	!! timesteps, check to see if we need another time from
78	!! the file. If so read it in. Time interpolate.
79	!!----------------------------------------------------------------------
80	INTEGER, INTENT( in ) :: kt ! ocean time-step index (for timesplitting option, otherwise zero)
81	!!
82	CHARACTER(LEN=80), DIMENSION(3) :: clfile ! names of input files
83	CHARACTER(LEN=70 ) :: clunits ! units attribute of time coordinate
84	LOGICAL :: lect ! flag for reading
85	INTEGER :: it, ib, ik, igrd ! dummy loop indices
86	INTEGER :: igrd_start, igrd_end ! start and end of loops on igrd
87	INTEGER :: idvar ! netcdf var ID
88	INTEGER :: iman, i15, imois ! Time variables for monthly clim forcing
89	INTEGER :: ntimes_bdyt, ntimes_bdyu, ntimes_bdyv
90	INTEGER :: itimer, totime
91	INTEGER :: ii, ij ! array addresses
92	INTEGER :: ipi, ipj, ipk, inum ! temporary integers (NetCDF read)
93	INTEGER :: iyear0, imonth0, iday0
94	INTEGER :: ihours0, iminutes0, isec0
95	INTEGER :: iyear, imonth, iday, isecs
96	INTEGER, DIMENSION(jpbtime) :: istept, istepu, istepv ! time arrays from data files
97	REAL(wp) :: dayfrac, zxy, zoffsett
98	REAL(wp) :: zoffsetu, zoffsetv
99	REAL(wp) :: dayjul0, zdayjulini
100	REAL(wp), DIMENSION(jpbtime) :: zstepr ! REAL time array from data files
101	REAL(wp), DIMENSION(jpbdta,1,jpk) :: zdta ! temporary array for data fields
102	!!---------------------------------------------------------------------------
103
104	IF( ln_bdy_dyn_frs .OR. ln_bdy_tra_frs ) THEN ! If these are both false then this routine
105	! does nothing.
106
107	! -------------------- !
108	! Initialization !
109	! -------------------- !
110
111	lect = .false. ! If true, read a time record
112
113	! Some time variables for monthly climatological forcing:
114	! *******************************************************
115	!!gm here use directely daymod variables
116
117	iman = INT( raamo ) ! Number of months in a year
118
119	i15 = INT( 2*REAL( nday, wp ) / ( REAL( nmonth_len(nmonth), wp ) + 0.5 ) )
120	! i15=0 if the current day is in the first half of the month, else i15=1
121
122	imois = nmonth + i15 - 1 ! imois is the first month record
123	IF( imois == 0 ) imois = iman
124
125	! Time variable for non-climatological forcing:
126	! *********************************************
127	itimer = (kt-nit000+1)*rdt ! current time in seconds for interpolation
128
129
130	! !-------------------!
131	IF( kt == nit000 ) THEN ! First call only !
132	! !-------------------!
133	istep(:) = 0
134	nbdy_b = 0
135	nbdy_a = 0
136
137	! Get time information from bdy data file
138	! ***************************************
139
140	IF(lwp) WRITE(numout,*)
141	IF(lwp) WRITE(numout,*) 'bdy_dta : Initialize unstructured boundary data'
142	IF(lwp) WRITE(numout,*) '~~~~~~~'
143
144	IF ( nbdy_dta == 0 ) THEN
145	!
146	IF(lwp) WRITE(numout,*) ' Bdy data are taken from initial conditions'
147	!
148	ELSEIF (nbdy_dta == 1) THEN
149	!
150	IF(lwp) WRITE(numout,*) ' Bdy data are read in netcdf files'
151	!
152	dayfrac = adatrj - REAL( itimer, wp ) / 86400. ! day fraction at time step kt-1
153	dayfrac = dayfrac - INT ( dayfrac ) !
154	totime = ( nitend - nit000 + 1 ) * rdt ! Total time of the run to verify that all the
155	! ! necessary time dumps in file are included
156	!
157	clfile(1) = filbdy_data_T
158	clfile(2) = filbdy_data_U
159	clfile(3) = filbdy_data_V
160	!
161	! how many files are we to read in?
162	igrd_start = 1
163	igrd_end = 3
164	IF(.NOT. ln_bdy_tra_frs .AND. .NOT. ln_bdy_ice_frs) THEN
165	! No T-grid file.
166	igrd_start = 2
167	ELSEIF ( .NOT. ln_bdy_dyn_frs ) THEN
168	! No U-grid or V-grid file.
169	igrd_end = 1
170	ENDIF
171
172	DO igrd = igrd_start, igrd_end ! loop over T, U & V grid !
173	! !---------------------------!
174	CALL iom_open( clfile(igrd), inum )
175	CALL iom_gettime( inum, zstepr, kntime=ntimes_bdy, cdunits=clunits )
176
177	SELECT CASE( igrd )
178	CASE (1)
179	numbdyt = inum
180	CASE (2)
181	numbdyu = inum
182	CASE (3)
183	numbdyv = inum
184	END SELECT
185
186	! Calculate time offset
187	READ(clunits,7000) iyear0, imonth0, iday0, ihours0, iminutes0, isec0
188	! Convert time origin in file to julian days
189	isec0 = isec0 + ihours060.60. + iminutes0*60.
190	CALL ymds2ju(iyear0, imonth0, iday0, REAL(isec0, wp), dayjul0)
191	! Compute model initialization time
192	iyear = ndastp / 10000
193	imonth = ( ndastp - iyear * 10000 ) / 100
194	iday = ndastp - iyear * 10000 - imonth * 100
195	isecs = dayfrac * 86400
196	CALL ymds2ju(iyear, imonth, iday, REAL(isecs, wp) , zdayjulini)
197	! offset from initialization date:
198	zoffset = (dayjul0-zdayjulini)*86400
199	!
200	7000 FORMAT('seconds since ', I4.4,'-',I2.2,'-',I2.2,' ',I2.2,':',I2.2,':',I2.2)
201
202	!! TO BE DONE... Check consistency between calendar from file
203	!! (available optionally from iom_gettime) and calendar in model
204	!! when calendar in model available outside of IOIPSL.
205
206	IF(lwp) WRITE(numout,*) 'number of times: ',ntimes_bdy
207	IF(lwp) WRITE(numout,*) 'offset: ',zoffset
208	IF(lwp) WRITE(numout,*) 'totime: ',totime
209	IF(lwp) WRITE(numout,*) 'zstepr: ',zstepr(1:ntimes_bdy)
210
211	! Check that there are not too many times in the file.
212	IF( ntimes_bdy > jpbtime ) THEN
213	WRITE(ctmp1,*) 'Check file: ', clfile(igrd), 'jpbtime= ', jpbtime, ' ntimes_bdy= ', ntimes_bdy
214	CALL ctl_stop( 'Number of time dumps in files exceed jpbtime parameter', ctmp1 )
215	ENDIF
216
217	! Check that time array increases:
218
219	it = 1
220	DO WHILE( zstepr(it+1) > zstepr(it) .AND. it /= ntimes_bdy - 1 )
221	it = it + 1
222	END DO
223
224	IF( it.NE.ntimes_bdy-1 .AND. ntimes_bdy > 1 ) THEN
225	WRITE(ctmp1,*) 'Check file: ', clfile(igrd)
226	CALL ctl_stop( 'Time array in unstructured boundary data files', &
227	& 'does not continuously increase.' , ctmp1 )
228	ENDIF
229	!
230	! Check that times in file span model run time:
231	IF( zstepr(1) + zoffset > 0 ) THEN
232	WRITE(ctmp1,*) 'Check file: ', clfile(igrd)
233	CALL ctl_stop( 'First time dump in bdy file is after model initial time', ctmp1 )
234	END IF
235	IF( zstepr(ntimes_bdy) + zoffset < totime ) THEN
236	WRITE(ctmp1,*) 'Check file: ', clfile(igrd)
237	CALL ctl_stop( 'Last time dump in bdy file is before model final time', ctmp1 )
238	END IF
239	!
240	SELECT CASE( igrd )
241	CASE (1)
242	ntimes_bdyt = ntimes_bdy
243	zoffsett = zoffset
244	istept(:) = INT( zstepr(:) + zoffset )
245	numbdyt = inum
246	CASE (2)
247	ntimes_bdyu = ntimes_bdy
248	zoffsetu = zoffset
249	istepu(:) = INT( zstepr(:) + zoffset )
250	numbdyu = inum
251	CASE (3)
252	ntimes_bdyv = ntimes_bdy
253	zoffsetv = zoffset
254	istepv(:) = INT( zstepr(:) + zoffset )
255	numbdyv = inum
256	END SELECT
257	!
258	END DO ! end loop over T, U & V grid
259
260	IF (igrd_start == 1 .and. igrd_end == 3) THEN
261	! Only test differences if we are reading in 3 files
262	! Verify time consistency between files
263	IF( ntimes_bdyu /= ntimes_bdyt .OR. ntimes_bdyv /= ntimes_bdyt ) THEN
264	CALL ctl_stop( 'Bdy data files must have the same number of time dumps', &
265	& 'Multiple time frequencies not implemented yet' )
266	ENDIF
267	ntimes_bdy = ntimes_bdyt
268	!
269	IF( zoffsetu /= zoffsett .OR. zoffsetv /= zoffsett ) THEN
270	CALL ctl_stop( 'Bdy data files must have the same time origin', &
271	& 'Multiple time frequencies not implemented yet' )
272	ENDIF
273	zoffset = zoffsett
274	ENDIF
275
276	IF( igrd_start == 1 ) THEN
277	istep(:) = istept(:)
278	ELSE
279	istep(:) = istepu(:)
280	ENDIF
281
282	! Check number of time dumps:
283	IF( ntimes_bdy == 1 .AND. .NOT. ln_bdy_clim ) THEN
284	CALL ctl_stop( 'There is only one time dump in data files', &
285	& 'Choose ln_bdy_clim=.true. in namelist for constant bdy forcing.' )
286	ENDIF
287
288	IF( ln_bdy_clim ) THEN
289	IF( ntimes_bdy /= 1 .AND. ntimes_bdy /= 12 ) THEN
290	CALL ctl_stop( 'For climatological boundary forcing (ln_bdy_clim=.true.),', &
291	& 'bdy data files must contain 1 or 12 time dumps.' )
292	ELSEIF( ntimes_bdy == 1 ) THEN
293	IF(lwp) WRITE(numout,*)
294	IF(lwp) WRITE(numout,*) 'We assume constant boundary forcing from bdy data files'
295	ELSEIF( ntimes_bdy == 12 ) THEN
296	IF(lwp) WRITE(numout,*)
297	IF(lwp) WRITE(numout,*) 'We assume monthly (and cyclic) boundary forcing from bdy data files'
298	ENDIF
299	ENDIF
300
301	! Find index of first record to read (before first model time).
302	it = 1
303	DO WHILE( istep(it+1) <= 0 .AND. it <= ntimes_bdy - 1 )
304	it = it + 1
305	END DO
306	nbdy_b = it
307	!
308	IF(lwp) WRITE(numout,*) 'Time offset is ',zoffset
309	IF(lwp) WRITE(numout,*) 'First record to read is ',nbdy_b
310
311	ENDIF ! endif (nbdy_dta == 1)
312
313
314	! 1.2 Read first record in file if necessary (ie if nbdy_dta == 1)
315	! *****************************************************************
316
317	IF( nbdy_dta == 0) THEN ! boundary data arrays are filled with initial conditions
318	!
319	IF (ln_bdy_tra_frs) THEN
320	igrd = 1 ! T-points data
321	DO ib = 1, nblen(igrd)
322	ii = nbi(ib,igrd)
323	ij = nbj(ib,igrd)
324	DO ik = 1, jpkm1
325	tbdy(ib,ik) = tn(ii, ij, ik)
326	sbdy(ib,ik) = sn(ii, ij, ik)
327	ENDDO
328	END DO
329	ENDIF
330
331	IF(ln_bdy_dyn_frs) THEN
332	igrd = 2 ! U-points data
333	DO ib = 1, nblen(igrd)
334	ii = nbi(ib,igrd)
335	ij = nbj(ib,igrd)
336	DO ik = 1, jpkm1
337	ubdy(ib,ik) = un(ii, ij, ik)
338	ENDDO
339	END DO
340
341	igrd = 3 ! V-points data
342	DO ib = 1, nblen(igrd)
343	ii = nbi(ib,igrd)
344	ij = nbj(ib,igrd)
345	DO ik = 1, jpkm1
346	vbdy(ib,ik) = vn(ii, ij, ik)
347	ENDDO
348	END DO
349	ENDIF
350	!
351	#if defined key_lim2
352	IF (ln_bdy_ice_frs) THEN
353	igrd = 1 ! T-points data
354	DO ib = 1, nblen(igrd)
355	frld_bdy(ib) = frld(nbi(ib,igrd), nbj(ib,igrd))
356	hicif_bdy(ib) = hicif(nbi(ib,igrd), nbj(ib,igrd))
357	hsnif_bdy(ib) = hsnif(nbi(ib,igrd), nbj(ib,igrd))
358	END DO
359	ENDIF
360	#endif
361	ELSEIF( nbdy_dta == 1 ) THEN ! Set first record in the climatological case:
362	!
363	IF( ln_bdy_clim .AND. ntimes_bdy == 1 ) THEN
364	nbdy_a = 1
365	ELSEIF( ln_bdy_clim .AND. ntimes_bdy == iman ) THEN
366	nbdy_b = 0
367	nbdy_a = imois
368	ELSE
369	nbdy_a = nbdy_b
370	ENDIF
371
372	! Read first record:
373	ipj = 1
374	ipk = jpk
375	igrd = 1
376	ipi = nblendta(igrd)
377
378	IF(ln_bdy_tra_frs) THEN
379	igrd = 1 ! Temperature
380	IF( nblendta(igrd) <= 0 ) THEN
381	idvar = iom_varid( numbdyt, 'votemper' )
382	nblendta(igrd) = iom_file(numbdyt)%dimsz(1,idvar)
383	ENDIF
384	IF(lwp) WRITE(numout,*) 'Dim size for votemper is ', nblendta(igrd)
385	ipi = nblendta(igrd)
386	CALL iom_get ( numbdyt, jpdom_unknown, 'votemper', zdta(1:ipi,1:ipj,1:ipk), nbdy_a )
387
388	DO ib = 1, nblen(igrd)
389	DO ik = 1, jpkm1
390	tbdydta(ib,ik,2) = zdta(nbmap(ib,igrd),1,ik)
391	END DO
392	END DO
393	!
394	igrd = 1 ! salinity
395	IF( nblendta(igrd) .le. 0 ) THEN
396	idvar = iom_varid( numbdyt, 'vosaline' )
397	nblendta(igrd) = iom_file(numbdyt)%dimsz(1,idvar)
398	ENDIF
399	IF(lwp) WRITE(numout,*) 'Dim size for vosaline is ', nblendta(igrd)
400	ipi = nblendta(igrd)
401	CALL iom_get ( numbdyt, jpdom_unknown, 'vosaline', zdta(1:ipi,1:ipj,1:ipk), nbdy_a )
402
403	DO ib = 1, nblen(igrd)
404	DO ik = 1, jpkm1
405	sbdydta(ib,ik,2) = zdta(nbmap(ib,igrd),1,ik)
406	END DO
407	END DO
408	ENDIF ! ln_bdy_tra_frs
409
410	IF(ln_bdy_dyn_frs) THEN
411
412	igrd = 2 ! u-velocity
413	IF ( nblendta(igrd) .le. 0 ) THEN
414	idvar = iom_varid( numbdyu,'vozocrtx' )
415	nblendta(igrd) = iom_file(numbdyu)%dimsz(1,idvar)
416	ENDIF
417	IF(lwp) WRITE(numout,*) 'Dim size for vozocrtx is ', nblendta(igrd)
418	ipi = nblendta(igrd)
419	CALL iom_get ( numbdyu, jpdom_unknown,'vozocrtx',zdta(1:ipi,1:ipj,1:ipk),nbdy_a )
420	DO ib = 1, nblen(igrd)
421	DO ik = 1, jpkm1
422	ubdydta(ib,ik,2) = zdta(nbmap(ib,igrd),1,ik)
423	END DO
424	END DO
425	!
426	igrd = 3 ! v-velocity
427	IF ( nblendta(igrd) .le. 0 ) THEN
428	idvar = iom_varid( numbdyv,'vomecrty' )
429	nblendta(igrd) = iom_file(numbdyv)%dimsz(1,idvar)
430	ENDIF
431	IF(lwp) WRITE(numout,*) 'Dim size for vomecrty is ', nblendta(igrd)
432	ipi = nblendta(igrd)
433	CALL iom_get ( numbdyv, jpdom_unknown,'vomecrty',zdta(1:ipi,1:ipj,1:ipk),nbdy_a )
434	DO ib = 1, nblen(igrd)
435	DO ik = 1, jpkm1
436	vbdydta(ib,ik,2) = zdta(nbmap(ib,igrd),1,ik)
437	END DO
438	END DO
439	ENDIF ! ln_bdy_dyn_frs
440
441	#if defined key_lim2
442	IF(ln_bdy_ice_frs) THEN
443	!
444	igrd=1 ! leads fraction
445	IF(lwp) WRITE(numout,*) 'Dim size for ildsconc is ',nblendta(igrd)
446	ipi=nblendta(igrd)
447	CALL iom_get ( numbdyt, jpdom_unknown,'ildsconc',zdta(1:ipi,:,1),nbdy_a )
448	DO ib=1, nblen(igrd)
449	frld_bdydta(ib,2) = zdta(nbmap(ib,igrd),1,1)
450	END DO
451	!
452	igrd=1 ! ice thickness
453	IF(lwp) WRITE(numout,*) 'Dim size for iicethic is ',nblendta(igrd)
454	ipi=nblendta(igrd)
455	CALL iom_get ( numbdyt, jpdom_unknown,'iicethic',zdta(1:ipi,:,1),nbdy_a )
456	DO ib=1, nblen(igrd)
457	hicif_bdydta(ib,2) = zdta(nbmap(ib,igrd),1,1)
458	END DO
459	!
460	igrd=1 ! snow thickness
461	IF(lwp) WRITE(numout,*) 'Dim size for isnowthi is ',nblendta(igrd)
462	ipi=nblendta(igrd)
463	CALL iom_get ( numbdyt, jpdom_unknown,'isnowthi',zdta(1:ipi,:,1),nbdy_a )
464	DO ib=1, nblen(igrd)
465	hsnif_bdydta(ib,2) = zdta(nbmap(ib,igrd),1,1)
466	END DO
467	ENDIF ! just if ln_bdy_ice_frs is set
468	#endif
469
470	IF ((.NOT.ln_bdy_clim) .AND. (istep(1) > 0)) THEN
471	! First data time is after start of run
472	! Put first value in both time levels
473	nbdy_b = nbdy_a
474	IF(ln_bdy_tra_frs) THEN
475	tbdydta(:,:,1) = tbdydta(:,:,2)
476	sbdydta(:,:,1) = sbdydta(:,:,2)
477	ENDIF
478	IF(ln_bdy_dyn_frs) THEN
479	ubdydta(:,:,1) = ubdydta(:,:,2)
480	vbdydta(:,:,1) = vbdydta(:,:,2)
481	ENDIF
482	#if defined key_lim2
483	IF( ln_bdy_ice_frs ) THEN
484	frld_bdydta (:,1) = frld_bdydta(:,2)
485	hicif_bdydta(:,1) = hicif_bdydta(:,2)
486	hsnif_bdydta(:,1) = hsnif_bdydta(:,2)
487	ENDIF
488	#endif
489	END IF
490
491	END IF ! nbdy_dta == 0/1
492
493	! In the case of constant boundary forcing fill bdy arrays once for all
494	IF ((ln_bdy_clim).AND.(ntimes_bdy==1)) THEN
495	IF(ln_bdy_tra_frs) THEN
496	tbdy (:,:) = tbdydta (:,:,2)
497	sbdy (:,:) = sbdydta (:,:,2)
498	ENDIF
499	IF(ln_bdy_dyn_frs) THEN
500	ubdy (:,:) = ubdydta (:,:,2)
501	vbdy (:,:) = vbdydta (:,:,2)
502	ENDIF
503	#if defined key_lim2
504	IF(ln_bdy_ice_frs) THEN
505	frld_bdy (:) = frld_bdydta (:,2)
506	hicif_bdy(:) = hicif_bdydta(:,2)
507	hsnif_bdy(:) = hsnif_bdydta(:,2)
508	ENDIF
509	#endif
510
511	IF(ln_bdy_tra_frs .or. ln_bdy_ice_frs) CALL iom_close( numbdyt )
512	IF(ln_bdy_dyn_frs) CALL iom_close( numbdyu )
513	IF(ln_bdy_dyn_frs) CALL iom_close( numbdyv )
514	END IF
515
516	ENDIF ! End if nit000
517
518
519	! !---------------------!
520	! ! at each time step !
521	! !---------------------!
522
523	IF( nbdy_dta == 1 .AND. ntimes_bdy > 1 ) THEN
524	!
525	! Read one more record if necessary
526	!**********************************
527
528	IF( ln_bdy_clim .AND. imois /= nbdy_b ) THEN ! remember that nbdy_b=0 for kt=nit000
529	nbdy_b = imois
530	nbdy_a = imois + 1
531	nbdy_b = MOD( nbdy_b, iman ) ; IF( nbdy_b == 0 ) nbdy_b = iman
532	nbdy_a = MOD( nbdy_a, iman ) ; IF( nbdy_a == 0 ) nbdy_a = iman
533	lect=.true.
534	ELSEIF( .NOT.ln_bdy_clim .AND. itimer >= istep(nbdy_a) ) THEN
535
536	IF ( nbdy_a < ntimes_bdy ) THEN
537	nbdy_b = nbdy_a
538	nbdy_a = nbdy_a + 1
539	lect =.true.
540	ELSE
541	! We have reached the end of the file
542	! put the last data time into both time levels
543	nbdy_b = nbdy_a
544	IF(ln_bdy_tra_frs) THEN
545	tbdydta(:,:,1) = tbdydta(:,:,2)
546	sbdydta(:,:,1) = sbdydta(:,:,2)
547	ENDIF
548	IF(ln_bdy_dyn_frs) THEN
549	ubdydta(:,:,1) = ubdydta(:,:,2)
550	vbdydta(:,:,1) = vbdydta(:,:,2)
551	ENDIF
552	#if defined key_lim2
553	IF(ln_bdy_ice_frs) THEN
554	frld_bdydta (:,1) = frld_bdydta (:,2)
555	hicif_bdydta(:,1) = hicif_bdydta(:,2)
556	hsnif_bdydta(:,1) = hsnif_bdydta(:,2)
557	ENDIF
558	#endif
559	END IF ! nbdy_a < ntimes_bdy
560
561	END IF
562
563	IF( lect ) THEN
564	! Swap arrays
565	IF(ln_bdy_tra_frs) THEN
566	tbdydta(:,:,1) = tbdydta(:,:,2)
567	sbdydta(:,:,1) = sbdydta(:,:,2)
568	ENDIF
569	IF(ln_bdy_dyn_frs) THEN
570	ubdydta(:,:,1) = ubdydta(:,:,2)
571	vbdydta(:,:,1) = vbdydta(:,:,2)
572	ENDIF
573	#if defined key_lim2
574	IF(ln_bdy_ice_frs) THEN
575	frld_bdydta (:,1) = frld_bdydta (:,2)
576	hicif_bdydta(:,1) = hicif_bdydta(:,2)
577	hsnif_bdydta(:,1) = hsnif_bdydta(:,2)
578	ENDIF
579	#endif
580	! read another set
581	ipj = 1
582	ipk = jpk
583
584	IF(ln_bdy_tra_frs) THEN
585	!
586	igrd = 1 ! temperature
587	ipi = nblendta(igrd)
588	CALL iom_get ( numbdyt, jpdom_unknown, 'votemper', zdta(1:ipi,1:ipj,1:ipk), nbdy_a )
589	DO ib = 1, nblen(igrd)
590	DO ik = 1, jpkm1
591	tbdydta(ib,ik,2) = zdta(nbmap(ib,igrd),1,ik)
592	END DO
593	END DO
594	!
595	igrd = 1 ! salinity
596	ipi = nblendta(igrd)
597	CALL iom_get ( numbdyt, jpdom_unknown, 'vosaline', zdta(1:ipi,1:ipj,1:ipk), nbdy_a )
598	DO ib = 1, nblen(igrd)
599	DO ik = 1, jpkm1
600	sbdydta(ib,ik,2) = zdta(nbmap(ib,igrd),1,ik)
601	END DO
602	END DO
603	ENDIF ! ln_bdy_tra_frs
604
605	IF(ln_bdy_dyn_frs) THEN
606	!
607	igrd = 2 ! u-velocity
608	ipi = nblendta(igrd)
609	CALL iom_get ( numbdyu, jpdom_unknown,'vozocrtx',zdta(1:ipi,1:ipj,1:ipk),nbdy_a )
610	DO ib = 1, nblen(igrd)
611	DO ik = 1, jpkm1
612	ubdydta(ib,ik,2) = zdta(nbmap(ib,igrd),1,ik)
613	END DO
614	END DO
615	!
616	igrd = 3 ! v-velocity
617	ipi = nblendta(igrd)
618	CALL iom_get ( numbdyv, jpdom_unknown,'vomecrty',zdta(1:ipi,1:ipj,1:ipk),nbdy_a )
619	DO ib = 1, nblen(igrd)
620	DO ik = 1, jpkm1
621	vbdydta(ib,ik,2) = zdta(nbmap(ib,igrd),1,ik)
622	END DO
623	END DO
624	ENDIF ! ln_bdy_dyn_frs
625	!
626	#if defined key_lim2
627	IF(ln_bdy_ice_frs) THEN
628	!
629	igrd = 1 ! ice concentration
630	ipi=nblendta(igrd)
631	CALL iom_get ( numbdyt, jpdom_unknown,'ildsconc',zdta(1:ipi,:,1),nbdy_a )
632	DO ib=1, nblen(igrd)
633	frld_bdydta(ib,2) = zdta( nbmap(ib,igrd), 1, 1 )
634	END DO
635	!
636	igrd=1 ! ice thickness
637	ipi=nblendta(igrd)
638	CALL iom_get ( numbdyt, jpdom_unknown,'iicethic',zdta(1:ipi,:,1),nbdy_a )
639	DO ib=1, nblen(igrd)
640	hicif_bdydta(ib,2) = zdta( nbmap(ib,igrd), 1, 1 )
641	END DO
642	!
643	igrd=1 ! snow thickness
644	ipi=nblendta(igrd)
645	CALL iom_get ( numbdyt, jpdom_unknown,'isnowthi',zdta(1:ipi,:,1),nbdy_a )
646	DO ib=1, nblen(igrd)
647	hsnif_bdydta(ib,2) = zdta( nbmap(ib,igrd), 1, 1 )
648	END DO
649	ENDIF ! ln_bdy_ice_frs
650	#endif
651	!
652	IF(lwp) WRITE(numout,*) 'bdy_dta : first record file used nbdy_b ',nbdy_b
653	IF(lwp) WRITE(numout,*) '~~~~~~~~ last record file used nbdy_a ',nbdy_a
654	IF (.NOT.ln_bdy_clim) THEN
655	IF(lwp) WRITE(numout,*) 'first record time (s): ', istep(nbdy_b)
656	IF(lwp) WRITE(numout,*) 'model time (s) : ', itimer
657	IF(lwp) WRITE(numout,*) 'second record time (s): ', istep(nbdy_a)
658	ENDIF
659	!
660	ENDIF ! end lect=.true.
661
662
663	! Interpolate linearly
664	! ********************
665	!
666	IF( ln_bdy_clim ) THEN ; zxy = REAL( nday ) / REAL( nmonth_len(nbdy_b) ) + 0.5 - i15
667	ELSEIF( istep(nbdy_b) == istep(nbdy_a) ) THEN
668	zxy = 0.0_wp
669	ELSE ; zxy = REAL( istep(nbdy_b) - itimer ) / REAL( istep(nbdy_b) - istep(nbdy_a) )
670	END IF
671
672	IF(ln_bdy_tra_frs) THEN
673	igrd = 1 ! temperature & salinity
674	DO ib = 1, nblen(igrd)
675	DO ik = 1, jpkm1
676	tbdy(ib,ik) = zxy * tbdydta(ib,ik,2) + (1.-zxy) * tbdydta(ib,ik,1)
677	sbdy(ib,ik) = zxy * sbdydta(ib,ik,2) + (1.-zxy) * sbdydta(ib,ik,1)
678	END DO
679	END DO
680	ENDIF
681
682	IF(ln_bdy_dyn_frs) THEN
683	igrd = 2 ! u-velocity
684	DO ib = 1, nblen(igrd)
685	DO ik = 1, jpkm1
686	ubdy(ib,ik) = zxy * ubdydta(ib,ik,2) + (1.-zxy) * ubdydta(ib,ik,1)
687	END DO
688	END DO
689	!
690	igrd = 3 ! v-velocity
691	DO ib = 1, nblen(igrd)
692	DO ik = 1, jpkm1
693	vbdy(ib,ik) = zxy * vbdydta(ib,ik,2) + (1.-zxy) * vbdydta(ib,ik,1)
694	END DO
695	END DO
696	ENDIF
697
698	#if defined key_lim2
699	IF(ln_bdy_ice_frs) THEN
700	igrd=1
701	DO ib=1, nblen(igrd)
702	frld_bdy(ib) = zxy * frld_bdydta(ib,2) + (1.-zxy) * frld_bdydta(ib,1)
703	hicif_bdy(ib) = zxy * hicif_bdydta(ib,2) + (1.-zxy) * hicif_bdydta(ib,1)
704	hsnif_bdy(ib) = zxy * hsnif_bdydta(ib,2) + (1.-zxy) * hsnif_bdydta(ib,1)
705	END DO
706	ENDIF ! just if ln_bdy_ice_frs is true
707	#endif
708
709	END IF !end if ((nbdy_dta==1).AND.(ntimes_bdy>1))
710
711
712	! !---------------------!
713	! ! last call !
714	! !---------------------!
715	IF( kt == nitend ) THEN
716	IF(ln_bdy_tra_frs .or. ln_bdy_ice_frs) CALL iom_close( numbdyt ) ! Closing of the 3 files
717	IF(ln_bdy_dyn_frs) CALL iom_close( numbdyu )
718	IF(ln_bdy_dyn_frs) CALL iom_close( numbdyv )
719	ENDIF
720	!
721	ENDIF ! ln_bdy_dyn_frs .OR. ln_bdy_tra_frs
722
723	END SUBROUTINE bdy_dta
724
725
726	SUBROUTINE bdy_dta_bt( kt, jit, icycl )
727	!!---------------------------------------------------------------------------
728	!! * SUBROUTINE bdy_dta_bt *
729	!!
730	!! ** Purpose : Read unstructured boundary data for Flather condition
731	!!
732	!! ** Method : At the first timestep, read in boundary data for two
733	!! times from the file and time-interpolate. At other
734	!! timesteps, check to see if we need another time from
735	!! the file. If so read it in. Time interpolate.
736	!!---------------------------------------------------------------------------
737	!!gm DOCTOR names : argument integer : start with "k"
738	INTEGER, INTENT( in ) :: kt ! ocean time-step index
739	INTEGER, INTENT( in ) :: jit ! barotropic time step index
740	INTEGER, INTENT( in ) :: icycl ! number of cycles need for final file close
741	! ! (for timesplitting option, otherwise zero)
742	!!
743	LOGICAL :: lect ! flag for reading
744	INTEGER :: it, ib, igrd ! dummy loop indices
745	INTEGER :: idvar ! netcdf var ID
746	INTEGER :: iman, i15, imois ! Time variables for monthly clim forcing
747	INTEGER :: ntimes_bdyt, ntimes_bdyu, ntimes_bdyv
748	INTEGER :: itimer, totime
749	INTEGER :: ipi, ipj, ipk, inum ! temporary integers (NetCDF read)
750	INTEGER :: iyear0, imonth0, iday0
751	INTEGER :: ihours0, iminutes0, isec0
752	INTEGER :: iyear, imonth, iday, isecs
753	INTEGER, DIMENSION(jpbtime) :: istept, istepu, istepv ! time arrays from data files
754	REAL(wp) :: dayfrac, zxy, zoffsett
755	REAL(wp) :: zoffsetu, zoffsetv
756	REAL(wp) :: dayjul0, zdayjulini
757	REAL(wp) :: zinterval_s, zinterval_e ! First and last interval in time axis
758	REAL(wp), DIMENSION(jpbtime) :: zstepr ! REAL time array from data files
759	REAL(wp), DIMENSION(jpbdta,1) :: zdta ! temporary array for data fields
760	CHARACTER(LEN=80), DIMENSION(6) :: clfile
761	CHARACTER(LEN=70 ) :: clunits ! units attribute of time coordinate
762	!!---------------------------------------------------------------------------
763
764	!!gm add here the same style as in bdy_dta
765	!!gm clearly bdy_dta_bt and bdy_dta can be combined...
766	!!gm too many things duplicated in the read of data... simplification can be done
767
768	! -------------------- !
769	! Initialization !
770	! -------------------- !
771
772	lect = .false. ! If true, read a time record
773
774	! Some time variables for monthly climatological forcing:
775	! *******************************************************
776	!!gm here use directely daymod variables
777
778	iman = INT( raamo ) ! Number of months in a year
779
780	i15 = INT( 2*REAL( nday, wp ) / ( REAL( nmonth_len(nmonth), wp ) + 0.5 ) )
781	! i15=0 if the current day is in the first half of the month, else i15=1
782
783	imois = nmonth + i15 - 1 ! imois is the first month record
784	IF( imois == 0 ) imois = iman
785
786	! Time variable for non-climatological forcing:
787	! *********************************************
788
789	itimer = ((kt-1)-nit000+1)*rdt ! current time in seconds for interpolation
790	itimer = itimer + jit*rdt/REAL(nn_baro,wp) ! in non-climatological case
791
792	IF ( ln_bdy_tides ) THEN
793
794	! -------------------------------------!
795	! Update BDY fields with tidal forcing !
796	! -------------------------------------!
797
798	CALL tide_update( kt, jit )
799
800	ENDIF
801
802	IF ( ln_bdy_dyn_fla ) THEN
803
804	! -------------------------------------!
805	! Update BDY fields with model data !
806	! -------------------------------------!
807
808	! !-------------------!
809	IF( kt == nit000 .and. jit ==2 ) THEN ! First call only !
810	! !-------------------!
811	istep_bt(:) = 0
812	nbdy_b_bt = 0
813	nbdy_a_bt = 0
814
815	! Get time information from bdy data file
816	! ***************************************
817
818	IF(lwp) WRITE(numout,*)
819	IF(lwp) WRITE(numout,*) 'bdy_dta_bt :Initialize unstructured boundary data for barotropic variables.'
820	IF(lwp) WRITE(numout,*) '~~~~~~~'
821
822	IF( nbdy_dta == 0 ) THEN
823	IF(lwp) WRITE(numout,*) 'Bdy data are taken from initial conditions'
824
825	ELSEIF (nbdy_dta == 1) THEN
826	IF(lwp) WRITE(numout,*) 'Bdy data are read in netcdf files'
827
828	dayfrac = adatrj - REAL(itimer,wp)/86400. ! day fraction at time step kt-1
829	dayfrac = dayfrac - INT (dayfrac) !
830	totime = (nitend-nit000+1)*rdt ! Total time of the run to verify that all the
831	! necessary time dumps in file are included
832
833	clfile(4) = filbdy_data_bt_T
834	clfile(5) = filbdy_data_bt_U
835	clfile(6) = filbdy_data_bt_V
836
837	DO igrd = 4,6
838
839	CALL iom_open( clfile(igrd), inum )
840	CALL iom_gettime( inum, zstepr, kntime=ntimes_bdy_bt, cdunits=clunits )
841
842	SELECT CASE( igrd )
843	CASE (4)
844	numbdyt_bt = inum
845	CASE (5)
846	numbdyu_bt = inum
847	CASE (6)
848	numbdyv_bt = inum
849	END SELECT
850
851	! Calculate time offset
852	READ(clunits,7000) iyear0, imonth0, iday0, ihours0, iminutes0, isec0
853	! Convert time origin in file to julian days
854	isec0 = isec0 + ihours060.60. + iminutes0*60.
855	CALL ymds2ju(iyear0, imonth0, iday0, REAL(isec0, wp), dayjul0)
856	! Compute model initialization time
857	iyear = ndastp / 10000
858	imonth = ( ndastp - iyear * 10000 ) / 100
859	iday = ndastp - iyear * 10000 - imonth * 100
860	isecs = dayfrac * 86400
861	CALL ymds2ju(iyear, imonth, iday, REAL(isecs, wp) , zdayjulini)
862	! zoffset from initialization date:
863	zoffset = (dayjul0-zdayjulini)*86400
864	!
865
866	7000 FORMAT('seconds since ', I4.4,'-',I2.2,'-',I2.2,' ',I2.2,':',I2.2,':',I2.2)
867
868	!! TO BE DONE... Check consistency between calendar from file
869	!! (available optionally from iom_gettime) and calendar in model
870	!! when calendar in model available outside of IOIPSL.
871
872	! Check that there are not too many times in the file.
873	IF (ntimes_bdy_bt > jpbtime) CALL ctl_stop( &
874	'Number of time dumps in bdy file exceed jpbtime parameter', &
875	'Check file:' // TRIM(clfile(igrd)) )
876
877	! Check that time array increases (or interp will fail):
878	DO it = 2, ntimes_bdy_bt
879	IF ( zstepr(it-1) >= zstepr(it) ) THEN
880	CALL ctl_stop('Time array in unstructured boundary data file', &
881	'does not continuously increase.', &
882	'Check file:' // TRIM(clfile(igrd)) )
883	EXIT
884	END IF
885	END DO
886
887	IF ( .NOT. ln_bdy_clim ) THEN
888	! Check that times in file span model run time:
889
890	! Note: the fields may be time means, so we allow nit000 to be before
891	! first time in the file, provided that it falls inside the meaning
892	! period of the first field. Until we can get the meaning period
893	! from the file, use the interval between fields as a proxy.
894	! If nit000 is before the first time, use the value at first time
895	! instead of extrapolating. This is done by putting time 1 into
896	! both time levels.
897	! The same applies to the last time level: see setting of lect below.
898
899	IF ( ntimes_bdy_bt == 1 ) CALL ctl_stop( &
900	'There is only one time dump in data files', &
901	'Set ln_bdy_clim=.true. in namelist for constant bdy forcing.' )
902
903	zinterval_s = zstepr(2) - zstepr(1)
904	zinterval_e = zstepr(ntimes_bdy_bt) - zstepr(ntimes_bdy_bt-1)
905
906	IF( zstepr(1) + zoffset > 0 ) THEN
907	WRITE(ctmp1,*) 'Check file: ', clfile(igrd)
908	CALL ctl_stop( 'First time dump in bdy file is after model initial time', ctmp1 )
909	END IF
910	IF( zstepr(ntimes_bdy_bt) + zoffset < totime ) THEN
911	WRITE(ctmp1,*) 'Check file: ', clfile(igrd)
912	CALL ctl_stop( 'Last time dump in bdy file is before model final time', ctmp1 )
913	END IF
914	END IF ! .NOT. ln_bdy_clim
915
916	IF ( igrd .EQ. 4) THEN
917	ntimes_bdyt = ntimes_bdy_bt
918	zoffsett = zoffset
919	istept(:) = INT( zstepr(:) + zoffset )
920	ELSE IF (igrd .EQ. 5) THEN
921	ntimes_bdyu = ntimes_bdy_bt
922	zoffsetu = zoffset
923	istepu(:) = INT( zstepr(:) + zoffset )
924	ELSE IF (igrd .EQ. 6) THEN
925	ntimes_bdyv = ntimes_bdy_bt
926	zoffsetv = zoffset
927	istepv(:) = INT( zstepr(:) + zoffset )
928	ENDIF
929
930	ENDDO
931
932	! Verify time consistency between files
933
934	IF ( ntimes_bdyu /= ntimes_bdyt .OR. ntimes_bdyv /= ntimes_bdyt ) THEN
935	CALL ctl_stop( &
936	'Time axis lengths differ between bdy data files', &
937	'Multiple time frequencies not implemented yet' )
938	ELSE
939	ntimes_bdy_bt = ntimes_bdyt
940	ENDIF
941
942	IF (zoffsetu.NE.zoffsett .OR. zoffsetv.NE.zoffsett) THEN
943	CALL ctl_stop( &
944	'Bdy data files must have the same time origin', &
945	'Multiple time frequencies not implemented yet' )
946	ENDIF
947	zoffset = zoffsett
948
949	!! Check that times are the same in the three files... HERE.
950	istep_bt(:) = istept(:)
951
952	! Check number of time dumps:
953	IF (ln_bdy_clim) THEN
954	SELECT CASE ( ntimes_bdy_bt )
955	CASE( 1 )
956	IF(lwp) WRITE(numout,*)
957	IF(lwp) WRITE(numout,*) 'We assume constant boundary forcing from bdy data files'
958	IF(lwp) WRITE(numout,*)
959	CASE( 12 )
960	IF(lwp) WRITE(numout,*)
961	IF(lwp) WRITE(numout,*) 'We assume monthly (and cyclic) boundary forcing from bdy data files'
962	IF(lwp) WRITE(numout,*)
963	CASE DEFAULT
964	CALL ctl_stop( &
965	'For climatological boundary forcing (ln_bdy_clim=.true.),',&
966	'bdy data files must contain 1 or 12 time dumps.' )
967	END SELECT
968	ENDIF
969
970	! Find index of first record to read (before first model time).
971
972	it=1
973	DO WHILE ( ((istep_bt(it+1)) <= 0 ).AND.(it.LE.(ntimes_bdy_bt-1)))
974	it=it+1
975	END DO
976	nbdy_b_bt = it
977
978	IF(lwp) WRITE(numout,*) 'Time offset is ',zoffset
979	IF(lwp) WRITE(numout,*) 'First record to read is ',nbdy_b_bt
980
981	ENDIF ! endif (nbdy_dta == 1)
982
983	! 1.2 Read first record in file if necessary (ie if nbdy_dta == 1)
984	! *****************************************************************
985
986	IF ( nbdy_dta == 0) THEN
987	! boundary data arrays are filled with initial conditions
988	igrd = 5 ! U-points data
989	DO ib = 1, nblen(igrd)
990	ubtbdy(ib) = un(nbi(ib,igrd), nbj(ib,igrd), 1)
991	END DO
992
993	igrd = 6 ! V-points data
994	DO ib = 1, nblen(igrd)
995	vbtbdy(ib) = vn(nbi(ib,igrd), nbj(ib,igrd), 1)
996	END DO
997
998	igrd = 4 ! T-points data
999	DO ib = 1, nblen(igrd)
1000	sshbdy(ib) = sshn(nbi(ib,igrd), nbj(ib,igrd))
1001	END DO
1002
1003	ELSEIF (nbdy_dta == 1) THEN
1004
1005	! Set first record in the climatological case:
1006	IF ((ln_bdy_clim).AND.(ntimes_bdy_bt==1)) THEN
1007	nbdy_a_bt = 1
1008	ELSEIF ((ln_bdy_clim).AND.(ntimes_bdy_bt==iman)) THEN
1009	nbdy_b_bt = 0
1010	nbdy_a_bt = imois
1011	ELSE
1012	nbdy_a_bt = nbdy_b_bt
1013	END IF
1014
1015	! Open Netcdf files:
1016
1017	CALL iom_open ( filbdy_data_bt_T, numbdyt_bt )
1018	CALL iom_open ( filbdy_data_bt_U, numbdyu_bt )
1019	CALL iom_open ( filbdy_data_bt_V, numbdyv_bt )
1020
1021	! Read first record:
1022	ipj=1
1023	igrd=4
1024	ipi=nblendta(igrd)
1025
1026	! ssh
1027	igrd=4
1028	IF ( nblendta(igrd) .le. 0 ) THEN
1029	idvar = iom_varid( numbdyt_bt,'sossheig' )
1030	nblendta(igrd) = iom_file(numbdyt_bt)%dimsz(1,idvar)
1031	ENDIF
1032	WRITE(numout,*) 'Dim size for sossheig is ',nblendta(igrd)
1033	ipi=nblendta(igrd)
1034
1035	CALL iom_get ( numbdyt_bt, jpdom_unknown,'sossheig',zdta(1:ipi,1:ipj),nbdy_a_bt )
1036
1037	DO ib=1, nblen(igrd)
1038	sshbdydta(ib,2) = zdta(nbmap(ib,igrd),1)
1039	END DO
1040
1041	! u-velocity
1042	igrd=5
1043	IF ( nblendta(igrd) .le. 0 ) THEN
1044	idvar = iom_varid( numbdyu_bt,'vobtcrtx' )
1045	nblendta(igrd) = iom_file(numbdyu_bt)%dimsz(1,idvar)
1046	ENDIF
1047	WRITE(numout,*) 'Dim size for vobtcrtx is ',nblendta(igrd)
1048	ipi=nblendta(igrd)
1049
1050	CALL iom_get ( numbdyu_bt, jpdom_unknown,'vobtcrtx',zdta(1:ipi,1:ipj),nbdy_a_bt )
1051
1052	DO ib=1, nblen(igrd)
1053	ubtbdydta(ib,2) = zdta(nbmap(ib,igrd),1)
1054	END DO
1055
1056	! v-velocity
1057	igrd=6
1058	IF ( nblendta(igrd) .le. 0 ) THEN
1059	idvar = iom_varid( numbdyv_bt,'vobtcrty' )
1060	nblendta(igrd) = iom_file(numbdyv_bt)%dimsz(1,idvar)
1061	ENDIF
1062	WRITE(numout,*) 'Dim size for vobtcrty is ',nblendta(igrd)
1063	ipi=nblendta(igrd)
1064
1065	CALL iom_get ( numbdyv_bt, jpdom_unknown,'vobtcrty',zdta(1:ipi,1:ipj),nbdy_a_bt )
1066
1067	DO ib=1, nblen(igrd)
1068	vbtbdydta(ib,2) = zdta(nbmap(ib,igrd),1)
1069	END DO
1070
1071	END IF
1072
1073	! In the case of constant boundary forcing fill bdy arrays once for all
1074	IF ((ln_bdy_clim).AND.(ntimes_bdy_bt==1)) THEN
1075
1076	ubtbdy (:) = ubtbdydta (:,2)
1077	vbtbdy (:) = vbtbdydta (:,2)
1078	sshbdy (:) = sshbdydta (:,2)
1079
1080	CALL iom_close( numbdyt_bt )
1081	CALL iom_close( numbdyu_bt )
1082	CALL iom_close( numbdyv_bt )
1083
1084	END IF
1085
1086	ENDIF ! End if nit000
1087
1088	! -------------------- !
1089	! 2. At each time step !
1090	! -------------------- !
1091
1092	IF ((nbdy_dta==1).AND.(ntimes_bdy_bt>1)) THEN
1093
1094	! 2.1 Read one more record if necessary
1095	!**************************************
1096
1097	IF ( (ln_bdy_clim).AND.(imois/=nbdy_b_bt) ) THEN ! remember that nbdy_b_bt=0 for kt=nit000
1098	nbdy_b_bt = imois
1099	nbdy_a_bt = imois+1
1100	nbdy_b_bt = MOD( nbdy_b_bt, iman )
1101	IF( nbdy_b_bt == 0 ) nbdy_b_bt = iman
1102	nbdy_a_bt = MOD( nbdy_a_bt, iman )
1103	IF( nbdy_a_bt == 0 ) nbdy_a_bt = iman
1104	lect=.true.
1105
1106	ELSEIF ((.NOT.ln_bdy_clim).AND.(itimer >= istep_bt(nbdy_a_bt))) THEN
1107	nbdy_b_bt=nbdy_a_bt
1108	nbdy_a_bt=nbdy_a_bt+1
1109	lect=.true.
1110	END IF
1111
1112	IF (lect) THEN
1113
1114	! Swap arrays
1115	sshbdydta(:,1) = sshbdydta(:,2)
1116	ubtbdydta(:,1) = ubtbdydta(:,2)
1117	vbtbdydta(:,1) = vbtbdydta(:,2)
1118
1119	! read another set
1120
1121	ipj=1
1122	ipk=jpk
1123	igrd=4
1124	ipi=nblendta(igrd)
1125
1126
1127	! ssh
1128	igrd=4
1129	ipi=nblendta(igrd)
1130
1131	CALL iom_get ( numbdyt_bt, jpdom_unknown,'sossheig',zdta(1:ipi,1:ipj),nbdy_a_bt )
1132
1133	DO ib=1, nblen(igrd)
1134	sshbdydta(ib,2) = zdta(nbmap(ib,igrd),1)
1135	END DO
1136
1137	! u-velocity
1138	igrd=5
1139	ipi=nblendta(igrd)
1140
1141	CALL iom_get ( numbdyu_bt, jpdom_unknown,'vobtcrtx',zdta(1:ipi,1:ipj),nbdy_a_bt )
1142
1143	DO ib=1, nblen(igrd)
1144	ubtbdydta(ib,2) = zdta(nbmap(ib,igrd),1)
1145	END DO
1146
1147	! v-velocity
1148	igrd=6
1149	ipi=nblendta(igrd)
1150
1151	CALL iom_get ( numbdyv_bt, jpdom_unknown,'vobtcrty',zdta(1:ipi,1:ipj),nbdy_a_bt )
1152
1153	DO ib=1, nblen(igrd)
1154	vbtbdydta(ib,2) = zdta(nbmap(ib,igrd),1)
1155	END DO
1156
1157
1158	IF(lwp) WRITE(numout,*) 'bdy_dta : first record file used nbdy_b_bt ',nbdy_b_bt
1159	IF(lwp) WRITE(numout,*) '~~~~~~~~ last record file used nbdy_a_bt ',nbdy_a_bt
1160	IF (.NOT.ln_bdy_clim) THEN
1161	IF(lwp) WRITE(numout,*) 'first record time (s): ', istep_bt(nbdy_b_bt)
1162	IF(lwp) WRITE(numout,*) 'model time (s) : ', itimer
1163	IF(lwp) WRITE(numout,*) 'second record time (s): ', istep_bt(nbdy_a_bt)
1164	ENDIF
1165	END IF ! end lect=.true.
1166
1167
1168	! 2.2 Interpolate linearly:
1169	! ***************************
1170
1171	IF (ln_bdy_clim) THEN
1172	zxy = REAL( nday, wp ) / REAL( nmonth_len(nbdy_b_bt), wp ) + 0.5 - i15
1173	ELSE
1174	zxy = REAL(istep_bt(nbdy_b_bt)-itimer, wp) / REAL(istep_bt(nbdy_b_bt)-istep_bt(nbdy_a_bt), wp)
1175	END IF
1176
1177	igrd=4
1178	DO ib=1, nblen(igrd)
1179	sshbdy(ib) = zxy * sshbdydta(ib,2) + &
1180	(1.-zxy) * sshbdydta(ib,1)
1181	END DO
1182
1183	igrd=5
1184	DO ib=1, nblen(igrd)
1185	ubtbdy(ib) = zxy * ubtbdydta(ib,2) + &
1186	(1.-zxy) * ubtbdydta(ib,1)
1187	END DO
1188
1189	igrd=6
1190	DO ib=1, nblen(igrd)
1191	vbtbdy(ib) = zxy * vbtbdydta(ib,2) + &
1192	(1.-zxy) * vbtbdydta(ib,1)
1193	END DO
1194
1195
1196	END IF !end if ((nbdy_dta==1).AND.(ntimes_bdy_bt>1))
1197
1198	! ------------------- !
1199	! Last call kt=nitend !
1200	! ------------------- !
1201
1202	! Closing of the 3 files
1203	IF( kt == nitend .and. jit == icycl ) THEN
1204	CALL iom_close( numbdyt_bt )
1205	CALL iom_close( numbdyu_bt )
1206	CALL iom_close( numbdyv_bt )
1207	ENDIF
1208
1209	ENDIF ! ln_bdy_dyn_frs
1210
1211	END SUBROUTINE bdy_dta_bt
1212
1213
1214	#else
1215	!!----------------------------------------------------------------------
1216	!! Dummy module NO Unstruct Open Boundary Conditions
1217	!!----------------------------------------------------------------------
1218	CONTAINS
1219	SUBROUTINE bdy_dta( kt ) ! Empty routine
1220	WRITE(,) 'bdy_dta: You should not have seen this print! error?', kt
1221	END SUBROUTINE bdy_dta
1222	SUBROUTINE bdy_dta_bt( kt, kit, icycle ) ! Empty routine
1223	WRITE(,) 'bdy_dta: You should not have seen this print! error?', kt, kit
1224	END SUBROUTINE bdy_dta_bt
1225	#endif
1226
1227	!!==============================================================================
1228	END MODULE bdydta

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