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fldread.F90 in branches/2017/dev_r8600_xios_write/NEMOGCM/NEMO/OPA_SRC/SBC – NEMO

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source: branches/2017/dev_r8600_xios_write/NEMOGCM/NEMO/OPA_SRC/SBC/fldread.F90 @ 8630

Last change on this file since 8630 was 8630, checked in by andmirek, 7 years ago
#1962 merge with branches/UKMO/dev_r7573_xios_write (doesn't woork)
Property svn:keywords set to `Id`
File size: 108.9 KB

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1	MODULE fldread
2	!!======================================================================
3	!! * MODULE fldread *
4	!! Ocean forcing: read input field for surface boundary condition
5	!!=====================================================================
6	!! History : 2.0 ! 2006-06 (S. Masson, G. Madec) Original code
7	!! 3.0 ! 2008-05 (S. Alderson) Modified for Interpolation in memory from input grid to model grid
8	!! 3.4 ! 2013-10 (D. Delrosso, P. Oddo) suppression of land point prior to interpolation
9	!! ! 12-2015 (J. Harle) Adding BDY on-the-fly interpolation
10	!!----------------------------------------------------------------------
11
12	!!----------------------------------------------------------------------
13	!! fld_read : read input fields used for the computation of the surface boundary condition
14	!! fld_init : initialization of field read
15	!! fld_rec : determined the record(s) to be read
16	!! fld_get : read the data
17	!! fld_map : read global data from file and map onto local data using a general mapping (use for open boundaries)
18	!! fld_rot : rotate the vector fields onto the local grid direction
19	!! fld_clopn : update the data file name and close/open the files
20	!! fld_fill : fill the data structure with the associated information read in namelist
21	!! wgt_list : manage the weights used for interpolation
22	!! wgt_print : print the list of known weights
23	!! fld_weight : create a WGT structure and fill in data from file, restructuring as required
24	!! apply_seaoverland : fill land with ocean values
25	!! seaoverland : create shifted matrices for seaoverland application
26	!! fld_interp : apply weights to input gridded data to create data on model grid
27	!! ksec_week : function returning the first 3 letters of the first day of the weekly file
28	!!----------------------------------------------------------------------
29	USE oce ! ocean dynamics and tracers
30	USE dom_oce ! ocean space and time domain
31	USE phycst ! physical constant
32	USE sbc_oce ! surface boundary conditions : fields
33	USE geo2ocean ! for vector rotation on to model grid
34	!
35	USE in_out_manager ! I/O manager
36	USE iom ! I/O manager library
37	USE ioipsl , ONLY : ymds2ju, ju2ymds ! for calendar
38	USE lib_mpp ! MPP library
39	USE wrk_nemo ! work arrays
40	USE lbclnk ! ocean lateral boundary conditions (C1D case)
41
42	IMPLICIT NONE
43	PRIVATE
44
45	PUBLIC fld_map ! routine called by tides_init
46	PUBLIC fld_read, fld_fill ! called by sbc... modules
47	PUBLIC fld_clopn
48
49	TYPE, PUBLIC :: FLD_N !: Namelist field informations
50	CHARACTER(len = 256) :: clname ! generic name of the NetCDF flux file
51	REAL(wp) :: nfreqh ! frequency of each flux file
52	CHARACTER(len = 34) :: clvar ! generic name of the variable in the NetCDF flux file
53	LOGICAL :: ln_tint ! time interpolation or not (T/F)
54	LOGICAL :: ln_clim ! climatology or not (T/F)
55	CHARACTER(len = 8) :: cltype ! type of data file 'daily', 'monthly' or yearly'
56	CHARACTER(len = 256) :: wname ! generic name of a NetCDF weights file to be used, blank if not
57	CHARACTER(len = 34) :: vcomp ! symbolic component name if a vector that needs rotation
58	! ! a string starting with "U" or "V" for each component
59	! ! chars 2 onwards identify which components go together
60	CHARACTER(len = 34) :: lname ! generic name of a NetCDF land/sea mask file to be used, blank if not
61	! ! 0=sea 1=land
62	END TYPE FLD_N
63
64	TYPE, PUBLIC :: FLD !: Input field related variables
65	CHARACTER(len = 256) :: clrootname ! generic name of the NetCDF file
66	CHARACTER(len = 256) :: clname ! current name of the NetCDF file
67	REAL(wp) :: nfreqh ! frequency of each flux file
68	CHARACTER(len = 34) :: clvar ! generic name of the variable in the NetCDF flux file
69	LOGICAL :: ln_tint ! time interpolation or not (T/F)
70	LOGICAL :: ln_clim ! climatology or not (T/F)
71	CHARACTER(len = 8) :: cltype ! type of data file 'daily', 'monthly' or yearly'
72	INTEGER :: num ! iom id of the jpfld files to be read
73	INTEGER , DIMENSION(2) :: nrec_b ! before record (1: index, 2: second since Jan. 1st 00h of nit000 year)
74	INTEGER , DIMENSION(2) :: nrec_a ! after record (1: index, 2: second since Jan. 1st 00h of nit000 year)
75	REAL(wp) , ALLOCATABLE, DIMENSION(:,:,: ) :: fnow ! input fields interpolated to now time step
76	REAL(wp) , ALLOCATABLE, DIMENSION(:,:,:,:) :: fdta ! 2 consecutive record of input fields
77	CHARACTER(len = 256) :: wgtname ! current name of the NetCDF weight file acting as a key
78	! ! into the WGTLIST structure
79	CHARACTER(len = 34) :: vcomp ! symbolic name for a vector component that needs rotation
80	LOGICAL, DIMENSION(2) :: rotn ! flag to indicate whether before/after field has been rotated
81	INTEGER :: nreclast ! last record to be read in the current file
82	CHARACTER(len = 256) :: lsmname ! current name of the NetCDF mask file acting as a key
83	INTEGER :: igrd ! grid type for bdy data
84	INTEGER :: ibdy ! bdy set id number
85	END TYPE FLD
86
87	TYPE, PUBLIC :: MAP_POINTER !: Map from input data file to local domain
88	INTEGER, POINTER, DIMENSION(:) :: ptr ! Array of integer pointers to 1D arrays
89	LOGICAL :: ll_unstruc ! Unstructured (T) or structured (F) boundary data file
90	END TYPE MAP_POINTER
91
92	!$AGRIF_DO_NOT_TREAT
93
94	!! keep list of all weights variables so they're only read in once
95	!! need to add AGRIF directives not to process this structure
96	!! also need to force wgtname to include AGRIF nest number
97	TYPE :: WGT !: Input weights related variables
98	CHARACTER(len = 256) :: wgtname ! current name of the NetCDF weight file
99	INTEGER , DIMENSION(2) :: ddims ! shape of input grid
100	INTEGER , DIMENSION(2) :: botleft ! top left corner of box in input grid containing
101	! ! current processor grid
102	INTEGER , DIMENSION(2) :: topright ! top right corner of box
103	INTEGER :: jpiwgt ! width of box on input grid
104	INTEGER :: jpjwgt ! height of box on input grid
105	INTEGER :: numwgt ! number of weights (4=bilinear, 16=bicubic)
106	INTEGER :: nestid ! for agrif, keep track of nest we're in
107	INTEGER :: overlap ! =0 when cyclic grid has no overlapping EW columns
108	! ! =>1 when they have one or more overlapping columns
109	! ! =-1 not cyclic
110	LOGICAL :: cyclic ! east-west cyclic or not
111	INTEGER, DIMENSION(:,:,:), POINTER :: data_jpi ! array of source integers
112	INTEGER, DIMENSION(:,:,:), POINTER :: data_jpj ! array of source integers
113	REAL(wp), DIMENSION(:,:,:), POINTER :: data_wgt ! array of weights on model grid
114	REAL(wp), DIMENSION(:,:,:), POINTER :: fly_dta ! array of values on input grid
115	REAL(wp), DIMENSION(:,:,:), POINTER :: col ! temporary array for reading in columns
116	END TYPE WGT
117
118	INTEGER, PARAMETER :: tot_wgts = 10
119	TYPE( WGT ), DIMENSION(tot_wgts) :: ref_wgts ! array of wgts
120	INTEGER :: nxt_wgt = 1 ! point to next available space in ref_wgts array
121	REAL(wp), PARAMETER :: undeff_lsm = -999.00_wp
122
123	!$AGRIF_END_DO_NOT_TREAT
124
125	!!----------------------------------------------------------------------
126	!! NEMO/OPA 3.3 , NEMO Consortium (2010)
127	!! $Id$
128	!! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
129	!!----------------------------------------------------------------------
130	CONTAINS
131
132	SUBROUTINE fld_read( kt, kn_fsbc, sd, map, kit, kt_offset, jpk_bdy, fvl )
133	!!---------------------------------------------------------------------
134	!! * ROUTINE fld_read *
135	!!
136	!! ** Purpose : provide at each time step the surface ocean fluxes
137	!! (momentum, heat, freshwater and runoff)
138	!!
139	!! ** Method : READ each input fields in NetCDF files using IOM
140	!! and intepolate it to the model time-step.
141	!! Several assumptions are made on the input file:
142	!! blahblahblah....
143	!!----------------------------------------------------------------------
144	INTEGER , INTENT(in ) :: kt ! ocean time step
145	INTEGER , INTENT(in ) :: kn_fsbc ! sbc computation period (in time step)
146	TYPE(FLD), INTENT(inout), DIMENSION(:) :: sd ! input field related variables
147	TYPE(MAP_POINTER),INTENT(in), OPTIONAL, DIMENSION(:) :: map ! global-to-local mapping indices
148	INTEGER , INTENT(in ), OPTIONAL :: kit ! subcycle timestep for timesplitting option
149	INTEGER , INTENT(in ), OPTIONAL :: kt_offset ! provide fields at time other than "now"
150	! ! kt_offset = -1 => fields at "before" time level
151	! ! kt_offset = +1 => fields at "after" time level
152	! ! etc.
153	INTEGER , INTENT(in ), OPTIONAL :: jpk_bdy ! number of vertical levels in the BDY data
154	LOGICAL , INTENT(in ), OPTIONAL :: fvl ! number of vertical levels in the BDY data
155	!!
156	INTEGER :: itmp ! local variable
157	INTEGER :: imf ! size of the structure sd
158	INTEGER :: jf ! dummy indices
159	INTEGER :: isecend ! number of second since Jan. 1st 00h of nit000 year at nitend
160	INTEGER :: isecsbc ! number of seconds between Jan. 1st 00h of nit000 year and the middle of sbc time step
161	INTEGER :: it_offset ! local time offset variable
162	LOGICAL :: llnxtyr ! open next year file?
163	LOGICAL :: llnxtmth ! open next month file?
164	LOGICAL :: llstop ! stop is the file does not exist
165	LOGICAL :: ll_firstcall ! true if this is the first call to fld_read for this set of fields
166	REAL(wp) :: ztinta ! ratio applied to after records when doing time interpolation
167	REAL(wp) :: ztintb ! ratio applied to before records when doing time interpolation
168	CHARACTER(LEN=1000) :: clfmt ! write format
169	TYPE(MAP_POINTER) :: imap ! global-to-local mapping indices
170	!!---------------------------------------------------------------------
171	ll_firstcall = kt == nit000
172	IF( PRESENT(kit) ) ll_firstcall = ll_firstcall .and. kit == 1
173
174	IF ( nn_components == jp_iam_sas ) THEN ; it_offset = nn_fsbc
175	ELSE ; it_offset = 0
176	ENDIF
177	IF( PRESENT(kt_offset) ) it_offset = kt_offset
178
179	imap%ptr => NULL()
180
181	! Note that shifting time to be centrered in the middle of sbc time step impacts only nsec_* variables of the calendar
182	IF( present(kit) ) THEN ! ignore kn_fsbc in this case
183	isecsbc = nsec_year + nsec1jan000 + (kit+it_offset)*NINT( rdt/REAL(nn_baro,wp) )
184	ELSE ! middle of sbc time step
185	isecsbc = nsec_year + nsec1jan000 + NINT(0.5 * REAL(kn_fsbc - 1,wp) * rdt) + it_offset * NINT(rdt)
186	ENDIF
187	imf = SIZE( sd )
188	!
189	IF( ll_firstcall ) THEN ! initialization
190	DO jf = 1, imf
191	IF( PRESENT(map) ) imap = map(jf)
192	IF( PRESENT(jpk_bdy) ) THEN
193	CALL fld_init( kn_fsbc, sd(jf), imap, jpk_bdy, fvl ) ! read each before field (put them in after as they will be swapped)
194	ELSE
195	CALL fld_init( kn_fsbc, sd(jf), imap ) ! read each before field (put them in after as they will be swapped)
196	ENDIF
197	END DO
198	IF( lwp ) CALL wgt_print() ! control print
199	ENDIF
200	! ! ====================================== !
201	IF( MOD( kt-1, kn_fsbc ) == 0 ) THEN ! update field at each kn_fsbc time-step !
202	! ! ====================================== !
203	!
204	DO jf = 1, imf ! --- loop over field --- !
205
206	IF( isecsbc > sd(jf)%nrec_a(2) .OR. ll_firstcall ) THEN ! read/update the after data?
207
208	IF( PRESENT(map) ) imap = map(jf) ! temporary definition of map
209
210	sd(jf)%nrec_b(:) = sd(jf)%nrec_a(:) ! swap before record informations
211	sd(jf)%rotn(1) = sd(jf)%rotn(2) ! swap before rotate informations
212	IF( sd(jf)%ln_tint ) sd(jf)%fdta(:,:,:,1) = sd(jf)%fdta(:,:,:,2) ! swap before record field
213
214	CALL fld_rec( kn_fsbc, sd(jf), kt_offset = it_offset, kit = kit ) ! update after record informations
215
216	! if kn_fsbc*rdt is larger than nfreqh (which is kind of odd),
217	! it is possible that the before value is no more the good one... we have to re-read it
218	! if before is not the last record of the file currently opened and after is the first record to be read
219	! in a new file which means after = 1 (the file to be opened corresponds to the current time)
220	! or after = nreclast + 1 (the file to be opened corresponds to a future time step)
221	IF( .NOT. ll_firstcall .AND. sd(jf)%ln_tint .AND. sd(jf)%nrec_b(1) /= sd(jf)%nreclast &
222	& .AND. MOD( sd(jf)%nrec_a(1), sd(jf)%nreclast ) == 1 ) THEN
223	itmp = sd(jf)%nrec_a(1) ! temporary storage
224	sd(jf)%nrec_a(1) = sd(jf)%nreclast ! read the last record of the file currently opened
225	CALL fld_get( sd(jf), imap ) ! read after data
226	sd(jf)%fdta(:,:,:,1) = sd(jf)%fdta(:,:,:,2) ! re-swap before record field
227	sd(jf)%nrec_b(1) = sd(jf)%nrec_a(1) ! update before record informations
228	sd(jf)%nrec_b(2) = sd(jf)%nrec_a(2) - NINT( sd(jf)%nfreqh * 3600 ) ! assume freq to be in hours in this case
229	sd(jf)%rotn(1) = sd(jf)%rotn(2) ! update before rotate informations
230	sd(jf)%nrec_a(1) = itmp ! move back to after record
231	ENDIF
232
233	CALL fld_clopn( sd(jf) ) ! Do we need to open a new year/month/week/day file?
234
235	IF( sd(jf)%ln_tint ) THEN
236
237	! if kn_fsbc*rdt is larger than nfreqh (which is kind of odd),
238	! it is possible that the before value is no more the good one... we have to re-read it
239	! if before record is not just just before the after record...
240	IF( .NOT. ll_firstcall .AND. MOD( sd(jf)%nrec_a(1), sd(jf)%nreclast ) /= 1 &
241	& .AND. sd(jf)%nrec_b(1) /= sd(jf)%nrec_a(1) - 1 ) THEN
242	sd(jf)%nrec_a(1) = sd(jf)%nrec_a(1) - 1 ! move back to before record
243	CALL fld_get( sd(jf), imap ) ! read after data
244	sd(jf)%fdta(:,:,:,1) = sd(jf)%fdta(:,:,:,2) ! re-swap before record field
245	sd(jf)%nrec_b(1) = sd(jf)%nrec_a(1) ! update before record informations
246	sd(jf)%nrec_b(2) = sd(jf)%nrec_a(2) - NINT( sd(jf)%nfreqh * 3600 ) ! assume freq to be in hours in this case
247	sd(jf)%rotn(1) = sd(jf)%rotn(2) ! update before rotate informations
248	sd(jf)%nrec_a(1) = sd(jf)%nrec_a(1) + 1 ! move back to after record
249	ENDIF
250
251	! do we have to change the year/month/week/day of the forcing field??
252	! if we do time interpolation we will need to open next year/month/week/day file before the end of the current
253	! one. If so, we are still before the end of the year/month/week/day when calling fld_rec so sd(jf)%nrec_a(1)
254	! will be larger than the record number that should be read for current year/month/week/day
255	! do we need next file data?
256	IF( sd(jf)%nrec_a(1) > sd(jf)%nreclast ) THEN
257
258	sd(jf)%nrec_a(1) = sd(jf)%nrec_a(1) - sd(jf)%nreclast !
259
260	IF( .NOT. ( sd(jf)%ln_clim .AND. sd(jf)%cltype == 'yearly' ) ) THEN ! close/open the current/new file
261
262	llnxtmth = sd(jf)%cltype == 'monthly' .OR. nday == nmonth_len(nmonth) ! open next month file?
263	llnxtyr = sd(jf)%cltype == 'yearly' .OR. (nmonth == 12 .AND. llnxtmth) ! open next year file?
264
265	! if the run finishes at the end of the current year/month/week/day, we will allow next
266	! year/month/week/day file to be not present. If the run continue further than the current
267	! year/month/week/day, next year/month/week/day file must exist
268	isecend = nsec_year + nsec1jan000 + (nitend - kt) * NINT(rdt) ! second at the end of the run
269	llstop = isecend > sd(jf)%nrec_a(2) ! read more than 1 record of next year
270	! we suppose that the date of next file is next day (should be ok even for weekly files...)
271	CALL fld_clopn( sd(jf), nyear + COUNT((/llnxtyr /)) , &
272	& nmonth + COUNT((/llnxtmth/)) - 12 * COUNT((/llnxtyr /)), &
273	& nday + 1 - nmonth_len(nmonth) * COUNT((/llnxtmth/)), llstop )
274
275	IF( sd(jf)%num <= 0 .AND. .NOT. llstop ) THEN ! next year file does not exist
276	CALL ctl_warn('next year/month/week/day file: '//TRIM(sd(jf)%clname)// &
277	& ' not present -> back to current year/month/day')
278	CALL fld_clopn( sd(jf) ) ! back to the current year/month/day
279	sd(jf)%nrec_a(1) = sd(jf)%nreclast ! force to read the last record in the current year file
280	ENDIF
281
282	ENDIF
283	ENDIF ! open need next file?
284
285	ENDIF ! temporal interpolation?
286
287	! read after data
288	IF( PRESENT(jpk_bdy) ) THEN
289	CALL fld_get( sd(jf), imap, jpk_bdy, fvl)
290	ELSE
291	CALL fld_get( sd(jf), imap )
292	ENDIF
293	ENDIF ! read new data?
294	END DO ! --- end loop over field --- !
295
296	CALL fld_rot( kt, sd ) ! rotate vector before/now/after fields if needed
297
298	DO jf = 1, imf ! --- loop over field --- !
299	!
300	IF( sd(jf)%ln_tint ) THEN ! temporal interpolation
301	IF(lwp .AND. kt - nit000 <= 100 ) THEN
302	clfmt = "(' fld_read: var ', a, ' kt = ', i8, ' (', f9.4,' days), Y/M/D = ', i4.4,'/', i2.2,'/', i2.2," // &
303	& "', records b/a: ', i6.4, '/', i6.4, ' (days ', f9.4,'/', f9.4, ')')"
304	WRITE(numout, clfmt) TRIM( sd(jf)%clvar ), kt, REAL(isecsbc,wp)/rday, nyear, nmonth, nday, &
305	& sd(jf)%nrec_b(1), sd(jf)%nrec_a(1), REAL(sd(jf)%nrec_b(2),wp)/rday, REAL(sd(jf)%nrec_a(2),wp)/rday
306	WRITE(numout, *) ' it_offset is : ',it_offset
307	ENDIF
308	! temporal interpolation weights
309	ztinta = REAL( isecsbc - sd(jf)%nrec_b(2), wp ) / REAL( sd(jf)%nrec_a(2) - sd(jf)%nrec_b(2), wp )
310	ztintb = 1. - ztinta
311	sd(jf)%fnow(:,:,:) = ztintb * sd(jf)%fdta(:,:,:,1) + ztinta * sd(jf)%fdta(:,:,:,2)
312	ELSE ! nothing to do...
313	IF(lwp .AND. kt - nit000 <= 100 ) THEN
314	clfmt = "(' fld_read: var ', a, ' kt = ', i8,' (', f9.4,' days), Y/M/D = ', i4.4,'/', i2.2,'/', i2.2," // &
315	& "', record: ', i6.4, ' (days ', f9.4, ' <-> ', f9.4, ')')"
316	WRITE(numout, clfmt) TRIM(sd(jf)%clvar), kt, REAL(isecsbc,wp)/rday, nyear, nmonth, nday, &
317	& sd(jf)%nrec_a(1), REAL(sd(jf)%nrec_b(2),wp)/rday, REAL(sd(jf)%nrec_a(2),wp)/rday
318	ENDIF
319	ENDIF
320	!
321	IF( kt == nitend - kn_fsbc + 1 ) CALL iom_close( sd(jf)%num ) ! Close the input files
322
323	END DO ! --- end loop over field --- !
324	!
325	ENDIF
326	!
327	END SUBROUTINE fld_read
328
329
330	SUBROUTINE fld_init( kn_fsbc, sdjf, map , jpk_bdy, fvl)
331	!!---------------------------------------------------------------------
332	!! * ROUTINE fld_init *
333	!!
334	!! ** Purpose : - first call to fld_rec to define before values
335	!! - if time interpolation, read before data
336	!!----------------------------------------------------------------------
337	INTEGER , INTENT(in ) :: kn_fsbc ! sbc computation period (in time step)
338	TYPE(FLD), INTENT(inout) :: sdjf ! input field related variables
339	TYPE(MAP_POINTER),INTENT(in) :: map ! global-to-local mapping indices
340	INTEGER , INTENT(in), OPTIONAL :: jpk_bdy ! number of vertical levels in the BDY data
341	LOGICAL , INTENT(in), OPTIONAL :: fvl ! number of vertical levels in the BDY data
342	!!
343	LOGICAL :: llprevyr ! are we reading previous year file?
344	LOGICAL :: llprevmth ! are we reading previous month file?
345	LOGICAL :: llprevweek ! are we reading previous week file?
346	LOGICAL :: llprevday ! are we reading previous day file?
347	LOGICAL :: llprev ! llprevyr .OR. llprevmth .OR. llprevweek .OR. llprevday
348	INTEGER :: idvar ! variable id
349	INTEGER :: inrec ! number of record existing for this variable
350	INTEGER :: iyear, imonth, iday ! first day of the current file in yyyy mm dd
351	INTEGER :: isec_week ! number of seconds since start of the weekly file
352	CHARACTER(LEN=1000) :: clfmt ! write format
353	!!---------------------------------------------------------------------
354	llprevyr = .FALSE.
355	llprevmth = .FALSE.
356	llprevweek = .FALSE.
357	llprevday = .FALSE.
358	isec_week = 0
359	!
360	! define record informations
361	CALL fld_rec( kn_fsbc, sdjf, ldbefore = .TRUE. ) ! return before values in sdjf%nrec_a (as we will swap it later)
362	!
363	! Note that shifting time to be centrered in the middle of sbc time step impacts only nsec_* variables of the calendar
364	!
365	IF( sdjf%ln_tint ) THEN ! we need to read the previous record and we will put it in the current record structure
366	!
367	IF( sdjf%nrec_a(1) == 0 ) THEN ! we redefine record sdjf%nrec_a(1) with the last record of previous year file
368	IF ( sdjf%nfreqh == -12 ) THEN ! yearly mean
369	IF( sdjf%cltype == 'yearly' ) THEN ! yearly file
370	sdjf%nrec_a(1) = 1 ! force to read the unique record
371	llprevyr = .NOT. sdjf%ln_clim ! use previous year file?
372	ELSE
373	CALL ctl_stop( "fld_init: yearly mean file must be in a yearly type of file: "//TRIM(sdjf%clrootname) )
374	ENDIF
375	ELSEIF( sdjf%nfreqh == -1 ) THEN ! monthly mean
376	IF( sdjf%cltype == 'monthly' ) THEN ! monthly file
377	sdjf%nrec_a(1) = 1 ! force to read the unique record
378	llprevmth = .TRUE. ! use previous month file?
379	llprevyr = llprevmth .AND. nmonth == 1 ! use previous year file?
380	ELSE ! yearly file
381	sdjf%nrec_a(1) = 12 ! force to read december mean
382	llprevyr = .NOT. sdjf%ln_clim ! use previous year file?
383	ENDIF
384	ELSE ! higher frequency mean (in hours)
385	IF ( sdjf%cltype == 'monthly' ) THEN ! monthly file
386	sdjf%nrec_a(1) = NINT( 24 * nmonth_len(nmonth-1) / sdjf%nfreqh ) ! last record of previous month
387	llprevmth = .TRUE. ! use previous month file?
388	llprevyr = llprevmth .AND. nmonth == 1 ! use previous year file?
389	ELSEIF( sdjf%cltype(1:4) == 'week' ) THEN ! weekly file
390	llprevweek = .TRUE. ! use previous week file?
391	sdjf%nrec_a(1) = NINT( 24 * 7 / sdjf%nfreqh ) ! last record of previous week
392	isec_week = NINT(rday) * 7 ! add a shift toward previous week
393	ELSEIF( sdjf%cltype == 'daily' ) THEN ! daily file
394	sdjf%nrec_a(1) = NINT( 24 / sdjf%nfreqh ) ! last record of previous day
395	llprevday = .TRUE. ! use previous day file?
396	llprevmth = llprevday .AND. nday == 1 ! use previous month file?
397	llprevyr = llprevmth .AND. nmonth == 1 ! use previous year file?
398	ELSE ! yearly file
399	sdjf%nrec_a(1) = NINT( 24 * nyear_len(0) / sdjf%nfreqh ) ! last record of previous year
400	llprevyr = .NOT. sdjf%ln_clim ! use previous year file?
401	ENDIF
402	ENDIF
403	ENDIF
404	!
405	IF ( sdjf%cltype(1:4) == 'week' ) THEN
406	isec_week = isec_week + ksec_week( sdjf%cltype(6:8) ) ! second since the beginning of the week
407	llprevmth = isec_week > nsec_month ! longer time since the beginning of the week than the month
408	llprevyr = llprevmth .AND. nmonth == 1
409	ENDIF
410	llprev = llprevyr .OR. llprevmth .OR. llprevweek .OR. llprevday
411	!
412	iyear = nyear - COUNT((/llprevyr /))
413	imonth = nmonth - COUNT((/llprevmth/)) + 12 * COUNT((/llprevyr /))
414	iday = nday - COUNT((/llprevday/)) + nmonth_len(nmonth-1) * COUNT((/llprevmth/)) - isec_week / NINT(rday)
415	!
416	CALL fld_clopn( sdjf, iyear, imonth, iday, .NOT. llprev )
417	!
418	! if previous year/month/day file does not exist, we switch to the current year/month/day
419	IF( llprev .AND. sdjf%num <= 0 ) THEN
420	CALL ctl_warn( 'previous year/month/week/day file: '//TRIM(sdjf%clrootname)// &
421	& ' not present -> back to current year/month/week/day' )
422	! we force to read the first record of the current year/month/day instead of last record of previous year/month/day
423	llprev = .FALSE.
424	sdjf%nrec_a(1) = 1
425	CALL fld_clopn( sdjf )
426	ENDIF
427	!
428	IF( llprev ) THEN ! check if the record sdjf%nrec_a(1) exists in the file
429	idvar = iom_varid( sdjf%num, sdjf%clvar ) ! id of the variable sdjf%clvar
430	IF( idvar <= 0 ) RETURN
431	inrec = iom_file( sdjf%num )%dimsz( iom_file( sdjf%num )%ndims(idvar), idvar ) ! size of the last dim of idvar
432	sdjf%nrec_a(1) = MIN( sdjf%nrec_a(1), inrec ) ! make sure we select an existing record
433	ENDIF
434	!
435	! read before data in after arrays(as we will swap it later)
436	IF( PRESENT(jpk_bdy) ) THEN
437	CALL fld_get( sdjf, map, jpk_bdy, fvl )
438	ELSE
439	CALL fld_get( sdjf, map )
440	ENDIF
441	!
442	clfmt = "(' fld_init : time-interpolation for ', a, ' read previous record = ', i6, ' at time = ', f7.2, ' days')"
443	IF(lwp) WRITE(numout, clfmt) TRIM(sdjf%clvar), sdjf%nrec_a(1), REAL(sdjf%nrec_a(2),wp)/rday
444	!
445	ENDIF
446	!
447	END SUBROUTINE fld_init
448
449
450	SUBROUTINE fld_rec( kn_fsbc, sdjf, ldbefore, kit, kt_offset )
451	!!---------------------------------------------------------------------
452	!! * ROUTINE fld_rec *
453	!!
454	!! ** Purpose : Compute
455	!! if sdjf%ln_tint = .TRUE.
456	!! nrec_a: record number and its time (nrec_b is obtained from nrec_a when swapping)
457	!! if sdjf%ln_tint = .FALSE.
458	!! nrec_a(1): record number
459	!! nrec_b(2) and nrec_a(2): time of the beginning and end of the record (for print only)
460	!!----------------------------------------------------------------------
461	INTEGER , INTENT(in ) :: kn_fsbc ! sbc computation period (in time step)
462	TYPE(FLD), INTENT(inout) :: sdjf ! input field related variables
463	LOGICAL , INTENT(in ), OPTIONAL :: ldbefore ! sent back before record values (default = .FALSE.)
464	INTEGER , INTENT(in ), OPTIONAL :: kit ! index of barotropic subcycle
465	! ! used only if sdjf%ln_tint = .TRUE.
466	INTEGER , INTENT(in ), OPTIONAL :: kt_offset ! Offset of required time level compared to "now"
467	! ! time level in units of time steps.
468	!
469	LOGICAL :: llbefore ! local definition of ldbefore
470	INTEGER :: iendrec ! end of this record (in seconds)
471	INTEGER :: imth ! month number
472	INTEGER :: ifreq_sec ! frequency mean (in seconds)
473	INTEGER :: isec_week ! number of seconds since the start of the weekly file
474	INTEGER :: it_offset ! local time offset variable
475	REAL(wp) :: ztmp ! temporary variable
476	!!----------------------------------------------------------------------
477	!
478	! Note that shifting time to be centrered in the middle of sbc time step impacts only nsec_* variables of the calendar
479	!
480	IF( PRESENT(ldbefore) ) THEN ; llbefore = ldbefore .AND. sdjf%ln_tint ! needed only if sdjf%ln_tint = .TRUE.
481	ELSE ; llbefore = .FALSE.
482	ENDIF
483	!
484	IF ( nn_components == jp_iam_sas ) THEN ; it_offset = nn_fsbc
485	ELSE ; it_offset = 0
486	ENDIF
487	IF( PRESENT(kt_offset) ) it_offset = kt_offset
488	IF( PRESENT(kit) ) THEN ; it_offset = ( kit + it_offset ) * NINT( rdt/REAL(nn_baro,wp) )
489	ELSE ; it_offset = it_offset * NINT( rdt )
490	ENDIF
491	!
492	! ! =========== !
493	IF ( sdjf%nfreqh == -12 ) THEN ! yearly mean
494	! ! =========== !
495	!
496	IF( sdjf%ln_tint ) THEN ! time interpolation, shift by 1/2 record
497	!
498	! INT( ztmp )
499	! /\|\
500	! 1 \| *----
501	! 0 \|----(
502	! \|----+----\|--> time
503	! 0 /\|\ 1 (nday/nyear_len(1))
504	! \|
505	! \|
506	! forcing record : 1
507	!
508	ztmp = REAL( nsec_year, wp ) / ( REAL( nyear_len(1), wp ) * rday ) + 0.5 &
509	& + REAL( it_offset, wp ) / ( REAL( nyear_len(1), wp ) * rday )
510	sdjf%nrec_a(1) = 1 + INT( ztmp ) - COUNT((/llbefore/))
511	! swap at the middle of the year
512	IF( llbefore ) THEN ; sdjf%nrec_a(2) = nsec1jan000 - (1 - INT(ztmp)) * NINT(0.5 * rday) * nyear_len(0) + &
513	& INT(ztmp) * NINT( 0.5 * rday) * nyear_len(1)
514	ELSE ; sdjf%nrec_a(2) = nsec1jan000 + (1 - INT(ztmp)) * NINT(0.5 * rday) * nyear_len(1) + &
515	& INT(ztmp) * INT(rday) * nyear_len(1) + INT(ztmp) * NINT( 0.5 * rday) * nyear_len(2)
516	ENDIF
517	ELSE ! no time interpolation
518	sdjf%nrec_a(1) = 1
519	sdjf%nrec_a(2) = NINT(rday) * nyear_len(1) + nsec1jan000 ! swap at the end of the year
520	sdjf%nrec_b(2) = nsec1jan000 ! beginning of the year (only for print)
521	ENDIF
522	!
523	! ! ============ !
524	ELSEIF( sdjf%nfreqh == -1 ) THEN ! monthly mean !
525	! ! ============ !
526	!
527	IF( sdjf%ln_tint ) THEN ! time interpolation, shift by 1/2 record
528	!
529	! INT( ztmp )
530	! /\|\
531	! 1 \| *----
532	! 0 \|----(
533	! \|----+----\|--> time
534	! 0 /\|\ 1 (nday/nmonth_len(nmonth))
535	! \|
536	! \|
537	! forcing record : nmonth
538	!
539	ztmp = REAL( nsec_month, wp ) / ( REAL( nmonth_len(nmonth), wp ) * rday ) + 0.5 &
540	& + REAL( it_offset, wp ) / ( REAL( nmonth_len(nmonth), wp ) * rday )
541	imth = nmonth + INT( ztmp ) - COUNT((/llbefore/))
542	IF( sdjf%cltype == 'monthly' ) THEN ; sdjf%nrec_a(1) = 1 + INT( ztmp ) - COUNT((/llbefore/))
543	ELSE ; sdjf%nrec_a(1) = imth
544	ENDIF
545	sdjf%nrec_a(2) = nmonth_half( imth ) + nsec1jan000 ! swap at the middle of the month
546	ELSE ! no time interpolation
547	IF( sdjf%cltype == 'monthly' ) THEN ; sdjf%nrec_a(1) = 1
548	ELSE ; sdjf%nrec_a(1) = nmonth
549	ENDIF
550	sdjf%nrec_a(2) = nmonth_end(nmonth ) + nsec1jan000 ! swap at the end of the month
551	sdjf%nrec_b(2) = nmonth_end(nmonth-1) + nsec1jan000 ! beginning of the month (only for print)
552	ENDIF
553	!
554	! ! ================================ !
555	ELSE ! higher frequency mean (in hours)
556	! ! ================================ !
557	!
558	ifreq_sec = NINT( sdjf%nfreqh * 3600 ) ! frequency mean (in seconds)
559	IF( sdjf%cltype(1:4) == 'week' ) isec_week = ksec_week( sdjf%cltype(6:8) ) ! since the first day of the current week
560	! number of second since the beginning of the file
561	IF( sdjf%cltype == 'monthly' ) THEN ; ztmp = REAL(nsec_month,wp) ! since the first day of the current month
562	ELSEIF( sdjf%cltype(1:4) == 'week' ) THEN ; ztmp = REAL(isec_week ,wp) ! since the first day of the current week
563	ELSEIF( sdjf%cltype == 'daily' ) THEN ; ztmp = REAL(nsec_day ,wp) ! since 00h of the current day
564	ELSE ; ztmp = REAL(nsec_year ,wp) ! since 00h on Jan 1 of the current year
565	ENDIF
566	ztmp = ztmp + 0.5 * REAL(kn_fsbc - 1, wp) * rdt + REAL( it_offset, wp ) ! centrered in the middle of sbc time step
567	ztmp = ztmp + 0.01 * rdt ! avoid truncation error
568	IF( sdjf%ln_tint ) THEN ! time interpolation, shift by 1/2 record
569	!
570	! INT( ztmp/ifreq_sec + 0.5 )
571	! /\|\
572	! 2 \| *-----(
573	! 1 \| *-----(
574	! 0 \|--(
575	! \|--+--\|--+--\|--+--\|--> time
576	! 0 /\|\ 1 /\|\ 2 /\|\ 3 (ztmp/ifreq_sec)
577	! \| \| \|
578	! \| \| \|
579	! forcing record : 1 2 3
580	!
581	ztmp= ztmp / REAL(ifreq_sec, wp) + 0.5
582	ELSE ! no time interpolation
583	!
584	! INT( ztmp/ifreq_sec )
585	! /\|\
586	! 2 \| *-----(
587	! 1 \| *-----(
588	! 0 \|-----(
589	! \|--+--\|--+--\|--+--\|--> time
590	! 0 /\|\ 1 /\|\ 2 /\|\ 3 (ztmp/ifreq_sec)
591	! \| \| \|
592	! \| \| \|
593	! forcing record : 1 2 3
594	!
595	ztmp= ztmp / REAL(ifreq_sec, wp)
596	ENDIF
597	sdjf%nrec_a(1) = 1 + INT( ztmp ) - COUNT((/llbefore/)) ! record number to be read
598
599	iendrec = ifreq_sec * sdjf%nrec_a(1) + nsec1jan000 ! end of this record (in second)
600	! add the number of seconds between 00h Jan 1 and the end of previous month/week/day (ok if nmonth=1)
601	IF( sdjf%cltype == 'monthly' ) iendrec = iendrec + NINT(rday) * SUM(nmonth_len(1:nmonth -1))
602	IF( sdjf%cltype(1:4) == 'week' ) iendrec = iendrec + ( nsec_year - isec_week )
603	IF( sdjf%cltype == 'daily' ) iendrec = iendrec + NINT(rday) * ( nday_year - 1 )
604	IF( sdjf%ln_tint ) THEN
605	sdjf%nrec_a(2) = iendrec - ifreq_sec / 2 ! swap at the middle of the record
606	ELSE
607	sdjf%nrec_a(2) = iendrec ! swap at the end of the record
608	sdjf%nrec_b(2) = iendrec - ifreq_sec ! beginning of the record (only for print)
609	ENDIF
610	!
611	ENDIF
612	!
613	END SUBROUTINE fld_rec
614
615
616	SUBROUTINE fld_get( sdjf, map, jpk_bdy, fvl )
617	!!---------------------------------------------------------------------
618	!! * ROUTINE fld_get *
619	!!
620	!! ** Purpose : read the data
621	!!----------------------------------------------------------------------
622	TYPE(FLD) , INTENT(inout) :: sdjf ! input field related variables
623	TYPE(MAP_POINTER), INTENT(in ) :: map ! global-to-local mapping indices
624	INTEGER , INTENT(in), OPTIONAL :: jpk_bdy ! number of vertical levels in the bdy data
625	LOGICAL , INTENT(in), OPTIONAL :: fvl ! number of vertical levels in the bdy data
626	!
627	INTEGER :: ipk ! number of vertical levels of sdjf%fdta ( 2D: ipk=1 ; 3D: ipk=jpk )
628	INTEGER :: iw ! index into wgts array
629	INTEGER :: ipdom ! index of the domain
630	INTEGER :: idvar ! variable ID
631	INTEGER :: idmspc ! number of spatial dimensions
632	LOGICAL :: lmoor ! C1D case: point data
633	!!---------------------------------------------------------------------
634	!
635	ipk = SIZE( sdjf%fnow, 3 )
636	!
637	IF( ASSOCIATED(map%ptr) ) THEN
638	IF( PRESENT(jpk_bdy) ) THEN
639	IF( sdjf%ln_tint ) THEN ; CALL fld_map( sdjf%num, sdjf%clvar, sdjf%fdta(:,:,:,2), &
640	sdjf%nrec_a(1), map, sdjf%igrd, sdjf%ibdy, jpk_bdy, fvl )
641	ELSE ; CALL fld_map( sdjf%num, sdjf%clvar, sdjf%fnow(:,:,: ), &
642	sdjf%nrec_a(1), map, sdjf%igrd, sdjf%ibdy, jpk_bdy, fvl )
643	ENDIF
644	ELSE
645	IF( sdjf%ln_tint ) THEN ; CALL fld_map( sdjf%num, sdjf%clvar, sdjf%fdta(:,:,:,2), sdjf%nrec_a(1), map )
646	ELSE ; CALL fld_map( sdjf%num, sdjf%clvar, sdjf%fnow(:,:,: ), sdjf%nrec_a(1), map )
647	ENDIF
648	ENDIF
649	ELSE IF( LEN(TRIM(sdjf%wgtname)) > 0 ) THEN
650	CALL wgt_list( sdjf, iw )
651	IF( sdjf%ln_tint ) THEN ; CALL fld_interp( sdjf%num, sdjf%clvar, iw, ipk, sdjf%fdta(:,:,:,2), &
652	& sdjf%nrec_a(1), sdjf%lsmname )
653	ELSE ; CALL fld_interp( sdjf%num, sdjf%clvar, iw, ipk, sdjf%fnow(:,:,: ), &
654	& sdjf%nrec_a(1), sdjf%lsmname )
655	ENDIF
656	ELSE
657	IF( SIZE(sdjf%fnow, 1) == jpi ) THEN ; ipdom = jpdom_data
658	ELSE ; ipdom = jpdom_unknown
659	ENDIF
660	! C1D case: If product of spatial dimensions == ipk, then x,y are of
661	! size 1 (point/mooring data): this must be read onto the central grid point
662	idvar = iom_varid( sdjf%num, sdjf%clvar )
663	idmspc = iom_file ( sdjf%num )%ndims( idvar )
664	IF( iom_file( sdjf%num )%luld( idvar ) ) idmspc = idmspc - 1
665	lmoor = ( idmspc == 0 .OR. PRODUCT( iom_file( sdjf%num )%dimsz( 1:MAX(idmspc,1) ,idvar ) ) == ipk )
666	!
667	SELECT CASE( ipk )
668	CASE(1)
669	IF( lk_c1d .AND. lmoor ) THEN
670	IF( sdjf%ln_tint ) THEN
671	CALL iom_get( sdjf%num, sdjf%clvar, sdjf%fdta(2,2,1,2), sdjf%nrec_a(1) )
672	CALL lbc_lnk( sdjf%fdta(:,:,1,2),'Z',1. )
673	ELSE
674	CALL iom_get( sdjf%num, sdjf%clvar, sdjf%fnow(2,2,1 ), sdjf%nrec_a(1) )
675	CALL lbc_lnk( sdjf%fnow(:,:,1 ),'Z',1. )
676	ENDIF
677	ELSE
678	IF( sdjf%ln_tint ) THEN ; CALL iom_get( sdjf%num, ipdom, sdjf%clvar, sdjf%fdta(:,:,1,2), sdjf%nrec_a(1) )
679	ELSE ; CALL iom_get( sdjf%num, ipdom, sdjf%clvar, sdjf%fnow(:,:,1 ), sdjf%nrec_a(1) )
680	ENDIF
681	ENDIF
682	CASE DEFAULT
683	IF (lk_c1d .AND. lmoor ) THEN
684	IF( sdjf%ln_tint ) THEN
685	CALL iom_get( sdjf%num, jpdom_unknown, sdjf%clvar, sdjf%fdta(2,2,:,2), sdjf%nrec_a(1) )
686	CALL lbc_lnk( sdjf%fdta(:,:,:,2),'Z',1. )
687	ELSE
688	CALL iom_get( sdjf%num, jpdom_unknown, sdjf%clvar, sdjf%fnow(2,2,: ), sdjf%nrec_a(1) )
689	CALL lbc_lnk( sdjf%fnow(:,:,: ),'Z',1. )
690	ENDIF
691	ELSE
692	IF( sdjf%ln_tint ) THEN ; CALL iom_get( sdjf%num, ipdom, sdjf%clvar, sdjf%fdta(:,:,:,2), sdjf%nrec_a(1) )
693	ELSE ; CALL iom_get( sdjf%num, ipdom, sdjf%clvar, sdjf%fnow(:,:,: ), sdjf%nrec_a(1) )
694	ENDIF
695	ENDIF
696	END SELECT
697	ENDIF
698	!
699	sdjf%rotn(2) = .false. ! vector not yet rotated
700	!
701	END SUBROUTINE fld_get
702
703	SUBROUTINE fld_map( num, clvar, dta, nrec, map, igrd, ibdy, jpk_bdy, fvl )
704	!!---------------------------------------------------------------------
705	!! * ROUTINE fld_map *
706	!!
707	!! ** Purpose : read global data from file and map onto local data
708	!! using a general mapping (for open boundaries)
709	!!----------------------------------------------------------------------
710
711	USE bdy_oce, ONLY: ln_bdy, idx_bdy, dta_global, dta_global_z, dta_global_dz, dta_global2, dta_global2_z, dta_global2_dz ! workspace to read in global data arrays
712
713	INTEGER , INTENT(in ) :: num ! stream number
714	CHARACTER(LEN=*) , INTENT(in ) :: clvar ! variable name
715	REAL(wp), DIMENSION(:,:,:), INTENT(out) :: dta ! output field on model grid (2 dimensional)
716	INTEGER , INTENT(in ) :: nrec ! record number to read (ie time slice)
717	TYPE(MAP_POINTER) , INTENT(in ) :: map ! global-to-local mapping indices
718	INTEGER , INTENT(in), OPTIONAL :: igrd, ibdy, jpk_bdy ! grid type, set number and number of vertical levels in the bdy data
719	LOGICAL , INTENT(in), OPTIONAL :: fvl ! grid type, set number and number of vertical levels in the bdy data
720	INTEGER :: jpkm1_bdy! number of vertical levels in the bdy data minus 1
721	!!
722	INTEGER :: ipi ! length of boundary data on local process
723	INTEGER :: ipj ! length of dummy dimension ( = 1 )
724	INTEGER :: ipk ! number of vertical levels of dta ( 2D: ipk=1 ; 3D: ipk=jpk )
725	INTEGER :: ilendta ! length of data in file
726	INTEGER :: idvar ! variable ID
727	INTEGER :: ib, ik, ji, jj ! loop counters
728	INTEGER :: ierr
729	REAL(wp) :: fv ! fillvalue
730	REAL(wp), POINTER, DIMENSION(:,:,:) :: dta_read ! work space for global data
731	REAL(wp), POINTER, DIMENSION(:,:,:) :: dta_read_z ! work space for global data
732	REAL(wp), POINTER, DIMENSION(:,:,:) :: dta_read_dz ! work space for global data
733	!!---------------------------------------------------------------------
734	!
735	ipi = SIZE( dta, 1 )
736	ipj = 1
737	ipk = SIZE( dta, 3 )
738	!
739	idvar = iom_varid( num, clvar )
740	ilendta = iom_file(num)%dimsz(1,idvar)
741
742	IF ( ln_bdy ) THEN
743	ipj = iom_file(num)%dimsz(2,idvar)
744	IF( map%ll_unstruc) THEN ! unstructured open boundary data file
745	dta_read => dta_global
746	IF( PRESENT(jpk_bdy) ) THEN
747	IF( jpk_bdy>0 ) THEN
748	dta_read_z => dta_global_z
749	dta_read_dz => dta_global_dz
750	jpkm1_bdy = jpk_bdy-1
751	ENDIF
752	ENDIF
753	ELSE ! structured open boundary file
754	dta_read => dta_global2
755	IF( PRESENT(jpk_bdy) ) THEN
756	IF( jpk_bdy>0 ) THEN
757	dta_read_z => dta_global2_z
758	dta_read_dz => dta_global2_dz
759	jpkm1_bdy = jpk_bdy-1
760	ENDIF
761	ENDIF
762	ENDIF
763	ENDIF
764
765	IF(lwp) WRITE(numout,*) 'Dim size for ', TRIM(clvar),' is ', ilendta
766	IF(lwp) WRITE(numout,*) 'Number of levels for ',TRIM(clvar),' is ', ipk
767	!
768	SELECT CASE( ipk )
769	CASE(1) ;
770	CALL iom_get ( num, jpdom_unknown, clvar, dta_read(1:ilendta,1:ipj,1 ), nrec )
771	IF ( map%ll_unstruc) THEN ! unstructured open boundary data file
772	DO ib = 1, ipi
773	DO ik = 1, ipk
774	dta(ib,1,ik) = dta_read(map%ptr(ib),1,ik)
775	END DO
776	END DO
777	ELSE ! we assume that this is a structured open boundary file
778	DO ib = 1, ipi
779	jj=1+floor(REAL(map%ptr(ib)-1)/REAL(ilendta))
780	ji=map%ptr(ib)-(jj-1)*ilendta
781	DO ik = 1, ipk
782	dta(ib,1,ik) = dta_read(ji,jj,ik)
783	END DO
784	END DO
785	ENDIF
786
787	!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
788	! Do we include something here to adjust barotropic velocities !
789	! in case of a depth difference between bdy files and !
790	! bathymetry in the case ln_full_vel = .false. and jpk_bdy>0? !
791	! [as the enveloping and parital cells could change H] !
792	!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
793
794	CASE DEFAULT ;
795
796	IF( PRESENT(jpk_bdy) .AND. jpk_bdy>0 ) THEN ! boundary data not on model grid: vertical interpolation
797	CALL iom_getatt(num, '_FillValue', fv, cdvar=clvar )
798	dta_read(:,:,:) = -ABS(fv)
799	dta_read_z(:,:,:) = 0._wp
800	dta_read_dz(:,:,:) = 0._wp
801	CALL iom_get ( num, jpdom_unknown, clvar, dta_read(1:ilendta,1:ipj,1:jpk_bdy), nrec )
802	SELECT CASE( igrd )
803	CASE(1)
804	CALL iom_get ( num, jpdom_unknown, 'gdept', dta_read_z(1:ilendta,1:ipj,1:jpk_bdy) )
805	CALL iom_get ( num, jpdom_unknown, 'e3t', dta_read_dz(1:ilendta,1:ipj,1:jpk_bdy) )
806	CASE(2)
807	CALL iom_get ( num, jpdom_unknown, 'gdepu', dta_read_z(1:ilendta,1:ipj,1:jpk_bdy) )
808	CALL iom_get ( num, jpdom_unknown, 'e3u', dta_read_dz(1:ilendta,1:ipj,1:jpk_bdy) )
809	CASE(3)
810	CALL iom_get ( num, jpdom_unknown, 'gdepv', dta_read_z(1:ilendta,1:ipj,1:jpk_bdy) )
811	CALL iom_get ( num, jpdom_unknown, 'e3v', dta_read_dz(1:ilendta,1:ipj,1:jpk_bdy) )
812	END SELECT
813
814	IF ( ln_bdy ) &
815	CALL fld_bdy_interp(dta_read, dta_read_z, dta_read_dz, map, jpk_bdy, igrd, ibdy, fv, dta, fvl, ilendta)
816
817	ELSE ! boundary data assumed to be on model grid
818
819	CALL iom_get ( num, jpdom_unknown, clvar, dta_read(1:ilendta,1:ipj,1:ipk), nrec )
820	IF ( map%ll_unstruc) THEN ! unstructured open boundary data file
821	DO ib = 1, ipi
822	DO ik = 1, ipk
823	dta(ib,1,ik) = dta_read(map%ptr(ib),1,ik)
824	END DO
825	END DO
826	ELSE ! we assume that this is a structured open boundary file
827	DO ib = 1, ipi
828	jj=1+floor(REAL(map%ptr(ib)-1)/REAL(ilendta))
829	ji=map%ptr(ib)-(jj-1)*ilendta
830	DO ik = 1, ipk
831	dta(ib,1,ik) = dta_read(ji,jj,ik)
832	END DO
833	END DO
834	ENDIF
835	ENDIF ! PRESENT(jpk_bdy)
836	END SELECT
837
838	END SUBROUTINE fld_map
839
840	SUBROUTINE fld_bdy_interp(dta_read, dta_read_z, dta_read_dz, map, jpk_bdy, igrd, ibdy, fv, dta, fvl, ilendta)
841
842	!!---------------------------------------------------------------------
843	!! * ROUTINE fld_bdy_interp *
844	!!
845	!! ** Purpose : on the fly vertical interpolation to allow the use of
846	!! boundary data from non-native vertical grid
847	!!----------------------------------------------------------------------
848	USE bdy_oce, ONLY: idx_bdy ! indexing for map <-> ij transformation
849
850	REAL(wp), POINTER, DIMENSION(:,:,:), INTENT(in ) :: dta_read ! work space for global data
851	REAL(wp), POINTER, DIMENSION(:,:,:), INTENT(in ) :: dta_read_z ! work space for global data
852	REAL(wp), POINTER, DIMENSION(:,:,:), INTENT(in ) :: dta_read_dz ! work space for global data
853	REAL(wp) , INTENT(in) :: fv ! fillvalue and alternative -ABS(fv)
854	REAL(wp), DIMENSION(:,:,:), INTENT(out) :: dta ! output field on model grid (2 dimensional)
855	TYPE(MAP_POINTER) , INTENT(in ) :: map ! global-to-local mapping indices
856	LOGICAL , INTENT(in), OPTIONAL :: fvl ! grid type, set number and number of vertical levels in the bdy data
857	INTEGER , INTENT(in) :: igrd, ibdy, jpk_bdy ! number of levels in bdy data
858	INTEGER , INTENT(in) :: ilendta ! length of data in file
859	!!
860	INTEGER :: ipi ! length of boundary data on local process
861	INTEGER :: ipj ! length of dummy dimension ( = 1 )
862	INTEGER :: ipk ! number of vertical levels of dta ( 2D: ipk=1 ; 3D: ipk=jpk )
863	INTEGER :: jpkm1_bdy ! number of levels in bdy data minus 1
864	INTEGER :: ib, ik, ikk ! loop counters
865	INTEGER :: ji, jj, zij, zjj ! temporary indices
866	REAL(wp) :: zl, zi, zh ! tmp variable for current depth and interpolation factor
867	REAL(wp) :: fv_alt, ztrans, ztrans_new ! fillvalue and alternative -ABS(fv)
868	CHARACTER (LEN=10) :: ibstr
869	!!---------------------------------------------------------------------
870
871
872	ipi = SIZE( dta, 1 )
873	ipj = SIZE( dta_read, 2 )
874	ipk = SIZE( dta, 3 )
875	jpkm1_bdy = jpk_bdy-1
876
877	fv_alt = -ABS(fv) ! set _FillValue < 0 as we make use of MAXVAL and MAXLOC later
878	DO ib = 1, ipi
879	zij = idx_bdy(ibdy)%nbi(ib,igrd)
880	zjj = idx_bdy(ibdy)%nbj(ib,igrd)
881	IF(narea==2) WRITE(,) 'MAPI', ib, igrd, map%ptr(ib), narea-1, zij, zjj
882	ENDDO
883	!
884	IF ( map%ll_unstruc ) THEN ! unstructured open boundary data file
885
886	DO ib = 1, ipi
887	DO ik = 1, jpk_bdy
888	IF( ( dta_read(map%ptr(ib),1,ik) == fv ) ) THEN
889	dta_read_z(map%ptr(ib),1,ik) = fv_alt ! safety: put fillvalue into external depth field so consistent with data
890	dta_read_dz(map%ptr(ib),1,ik) = 0._wp ! safety: put 0._wp into external thickness factors to ensure transport is correct
891	ENDIF
892	ENDDO
893	ENDDO
894
895	DO ib = 1, ipi
896	zij = idx_bdy(ibdy)%nbi(ib,igrd)
897	zjj = idx_bdy(ibdy)%nbj(ib,igrd)
898	zh = SUM(dta_read_dz(map%ptr(ib),1,:) )
899	! Warnings to flag differences in the input and model topgraphy - is this useful/necessary?
900	SELECT CASE( igrd )
901	CASE(1)
902	IF( ABS( (zh - ht_n(zij,zjj)) / ht_n(zij,zjj)) * tmask(zij,zjj,1) > 0.01_wp ) THEN
903	WRITE(ibstr,"(I10.10)") map%ptr(ib)
904	CALL ctl_warn('fld_bdy_interp: T depths differ between grids at BDY point '//TRIM(ibstr)//' by more than 1%')
905	! IF(lwp) WRITE(,) 'DEPTHT', zh, sum(e3t_n(zij,zjj,:), mask=tmask(zij,zjj,:)==1), ht_n(zij,zjj), map%ptr(ib), ib, zij, zjj
906	ENDIF
907	CASE(2)
908	IF( ABS( (zh - hu_n(zij,zjj)) * r1_hu_n(zij,zjj)) * umask(zij,zjj,1) > 0.01_wp ) THEN
909	WRITE(ibstr,"(I10.10)") map%ptr(ib)
910	CALL ctl_warn('fld_bdy_interp: U depths differ between grids at BDY point '//TRIM(ibstr)//' by more than 1%')
911	IF(lwp) WRITE(,) 'DEPTHU', zh, sum(e3u_n(zij,zjj,:), mask=umask(zij,zjj,:)==1), sum(umask(zij,zjj,:)), &
912	& hu_n(zij,zjj), map%ptr(ib), ib, zij, zjj, narea-1 , &
913	& dta_read(map%ptr(ib),1,:)
914	ENDIF
915	CASE(3)
916	IF( ABS( (zh - hv_n(zij,zjj)) * r1_hv_n(zij,zjj)) * vmask(zij,zjj,1) > 0.01_wp ) THEN
917	WRITE(ibstr,"(I10.10)") map%ptr(ib)
918	CALL ctl_warn('fld_bdy_interp: V depths differ between grids at BDY point '//TRIM(ibstr)//' by more than 1%')
919	ENDIF
920	END SELECT
921	DO ik = 1, ipk
922	SELECT CASE( igrd )
923	CASE(1)
924	zl = gdept_n(zij,zjj,ik) ! if using in step could use fsdept instead of gdept_n?
925	CASE(2)
926	IF(ln_sco) THEN
927	zl = ( gdept_n(zij,zjj,ik) + gdept_n(zij+1,zjj,ik) ) * 0.5_wp ! if using in step could use fsdept instead of gdept_n?
928	ELSE
929	zl = MIN( gdept_n(zij,zjj,ik), gdept_n(zij+1,zjj,ik) )
930	ENDIF
931	CASE(3)
932	IF(ln_sco) THEN
933	zl = ( gdept_n(zij,zjj,ik) + gdept_n(zij,zjj+1,ik) ) * 0.5_wp ! if using in step could use fsdept instead of gdept_n?
934	ELSE
935	zl = MIN( gdept_n(zij,zjj,ik), gdept_n(zij,zjj+1,ik) )
936	ENDIF
937	END SELECT
938	IF( zl < dta_read_z(map%ptr(ib),1,1) ) THEN ! above the first level of external data
939	dta(ib,1,ik) = dta_read(map%ptr(ib),1,1)
940	ELSEIF( zl > MAXVAL(dta_read_z(map%ptr(ib),1,:),1) ) THEN ! below the last level of external data
941	dta(ib,1,ik) = dta_read(map%ptr(ib),1,MAXLOC(dta_read_z(map%ptr(ib),1,:),1))
942	ELSE ! inbetween : vertical interpolation between ikk & ikk+1
943	DO ikk = 1, jpkm1_bdy ! when gdept_n(ikk) < zl < gdept_n(ikk+1)
944	IF( ( (zl-dta_read_z(map%ptr(ib),1,ikk)) * (zl-dta_read_z(map%ptr(ib),1,ikk+1)) <= 0._wp) &
945	& .AND. (dta_read_z(map%ptr(ib),1,ikk+1) /= fv_alt)) THEN
946	zi = ( zl - dta_read_z(map%ptr(ib),1,ikk) ) / &
947	& ( dta_read_z(map%ptr(ib),1,ikk+1) - dta_read_z(map%ptr(ib),1,ikk) )
948	dta(ib,1,ik) = dta_read(map%ptr(ib),1,ikk) + &
949	& ( dta_read(map%ptr(ib),1,ikk+1) - dta_read(map%ptr(ib),1,ikk) ) * zi
950	ENDIF
951	END DO
952	ENDIF
953	END DO
954	END DO
955
956	IF(igrd == 2) THEN ! do we need to adjust the transport term?
957	DO ib = 1, ipi
958	zij = idx_bdy(ibdy)%nbi(ib,igrd)
959	zjj = idx_bdy(ibdy)%nbj(ib,igrd)
960	zh = SUM(dta_read_dz(map%ptr(ib),1,:) )
961	ztrans = 0._wp
962	ztrans_new = 0._wp
963	DO ik = 1, jpk_bdy ! calculate transport on input grid
964	ztrans = ztrans + dta_read(map%ptr(ib),1,ik) * dta_read_dz(map%ptr(ib),1,ik)
965	ENDDO
966	DO ik = 1, ipk ! calculate transport on model grid
967	ztrans_new = ztrans_new + dta(ib,1,ik) * e3u_n(zij,zjj,ik) * umask(zij,zjj,ik)
968	ENDDO
969	DO ik = 1, ipk ! make transport correction
970	IF(fvl) THEN ! bdy data are total velocity so adjust bt transport term to match input data
971	dta(ib,1,ik) = ( dta(ib,1,ik) + ( ztrans - ztrans_new ) * r1_hu_n(zij,zjj) ) * umask(zij,zjj,ik)
972	ELSE ! we're just dealing with bc velocity so bt transport term should sum to zero
973	IF( ABS(ztrans * r1_hu_n(zij,zjj)) > 0.01_wp ) &
974	& CALL ctl_warn('fld_bdy_interp: barotropic component of > 0.01 ms-1 found in baroclinic velocities at')
975	dta(ib,1,ik) = dta(ib,1,ik) + ( 0._wp - ztrans_new ) * r1_hu_n(zij,zjj) * umask(zij,zjj,ik)
976	ENDIF
977	ENDDO
978	ENDDO
979	ENDIF
980
981	IF(igrd == 3) THEN ! do we need to adjust the transport term?
982	DO ib = 1, ipi
983	zij = idx_bdy(ibdy)%nbi(ib,igrd)
984	zjj = idx_bdy(ibdy)%nbj(ib,igrd)
985	zh = SUM(dta_read_dz(map%ptr(ib),1,:) )
986	ztrans = 0._wp
987	ztrans_new = 0._wp
988	DO ik = 1, jpk_bdy ! calculate transport on input grid
989	ztrans = ztrans + dta_read(map%ptr(ib),1,ik) * dta_read_dz(map%ptr(ib),1,ik)
990	ENDDO
991	DO ik = 1, ipk ! calculate transport on model grid
992	ztrans_new = ztrans_new + dta(ib,1,ik) * e3v_n(zij,zjj,ik) * vmask(zij,zjj,ik)
993	ENDDO
994	DO ik = 1, ipk ! make transport correction
995	IF(fvl) THEN ! bdy data are total velocity so adjust bt transport term to match input data
996	dta(ib,1,ik) = ( dta(ib,1,ik) + ( ztrans - ztrans_new ) * r1_hv_n(zij,zjj) ) * vmask(zij,zjj,ik)
997	ELSE ! we're just dealing with bc velocity so bt transport term should sum to zero
998	dta(ib,1,ik) = dta(ib,1,ik) + ( 0._wp - ztrans_new ) * r1_hv_n(zij,zjj) * vmask(zij,zjj,ik)
999	ENDIF
1000	ENDDO
1001	ENDDO
1002	ENDIF
1003
1004	ELSE ! structured open boundary file
1005
1006	DO ib = 1, ipi
1007	jj=1+floor(REAL(map%ptr(ib)-1)/REAL(ilendta))
1008	ji=map%ptr(ib)-(jj-1)*ilendta
1009	DO ik = 1, jpk_bdy
1010	IF( ( dta_read(ji,jj,ik) == fv ) ) THEN
1011	dta_read_z(ji,jj,ik) = fv_alt ! safety: put fillvalue into external depth field so consistent with data
1012	dta_read_dz(ji,jj,ik) = 0._wp ! safety: put 0._wp into external thickness factors to ensure transport is correct
1013	ENDIF
1014	ENDDO
1015	ENDDO
1016
1017
1018	DO ib = 1, ipi
1019	jj=1+floor(REAL(map%ptr(ib)-1)/REAL(ilendta))
1020	ji=map%ptr(ib)-(jj-1)*ilendta
1021	zij = idx_bdy(ibdy)%nbi(ib,igrd)
1022	zjj = idx_bdy(ibdy)%nbj(ib,igrd)
1023	zh = SUM(dta_read_dz(ji,jj,:) )
1024	! Warnings to flag differences in the input and model topgraphy - is this useful/necessary?
1025	SELECT CASE( igrd )
1026	CASE(1)
1027	IF( ABS( (zh - ht_n(zij,zjj)) / ht_n(zij,zjj)) * tmask(zij,zjj,1) > 0.01_wp ) THEN
1028	WRITE(ibstr,"(I10.10)") map%ptr(ib)
1029	CALL ctl_warn('fld_bdy_interp: T depths differ between grids at BDY point '//TRIM(ibstr)//' by more than 1%')
1030	! IF(lwp) WRITE(,) 'DEPTHT', zh, sum(e3t_n(zij,zjj,:), mask=tmask(zij,zjj,:)==1), ht_n(zij,zjj), map%ptr(ib), ib, zij, zjj
1031	ENDIF
1032	CASE(2)
1033	IF( ABS( (zh - hu_n(zij,zjj)) * r1_hu_n(zij,zjj)) * umask(zij,zjj,1) > 0.01_wp ) THEN
1034	WRITE(ibstr,"(I10.10)") map%ptr(ib)
1035	CALL ctl_warn('fld_bdy_interp: U depths differ between grids at BDY point '//TRIM(ibstr)//' by more than 1%')
1036	ENDIF
1037	CASE(3)
1038	IF( ABS( (zh - hv_n(zij,zjj)) * r1_hv_n(zij,zjj)) * vmask(zij,zjj,1) > 0.01_wp ) THEN
1039	WRITE(ibstr,"(I10.10)") map%ptr(ib)
1040	CALL ctl_warn('fld_bdy_interp: V depths differ between grids at BDY point '//TRIM(ibstr)//' by more than 1%')
1041	ENDIF
1042	END SELECT
1043	DO ik = 1, ipk
1044	SELECT CASE( igrd ) ! coded for sco - need zco and zps option using min
1045	CASE(1)
1046	zl = gdept_n(zij,zjj,ik) ! if using in step could use fsdept instead of gdept_n?
1047	CASE(2)
1048	IF(ln_sco) THEN
1049	zl = ( gdept_n(zij,zjj,ik) + gdept_n(zij+1,zjj,ik) ) * 0.5_wp ! if using in step could use fsdept instead of gdept_n?
1050	ELSE
1051	zl = MIN( gdept_n(zij,zjj,ik), gdept_n(zij+1,zjj,ik) )
1052	ENDIF
1053	CASE(3)
1054	IF(ln_sco) THEN
1055	zl = ( gdept_n(zij,zjj,ik) + gdept_n(zij,zjj+1,ik) ) * 0.5_wp ! if using in step could use fsdept instead of gdept_n?
1056	ELSE
1057	zl = MIN( gdept_n(zij,zjj,ik), gdept_n(zij,zjj+1,ik) )
1058	ENDIF
1059	END SELECT
1060	IF( zl < dta_read_z(ji,jj,1) ) THEN ! above the first level of external data
1061	dta(ib,1,ik) = dta_read(ji,jj,1)
1062	ELSEIF( zl > MAXVAL(dta_read_z(ji,jj,:),1) ) THEN ! below the last level of external data
1063	dta(ib,1,ik) = dta_read(ji,jj,MAXLOC(dta_read_z(ji,jj,:),1))
1064	ELSE ! inbetween : vertical interpolation between ikk & ikk+1
1065	DO ikk = 1, jpkm1_bdy ! when gdept_n(ikk) < zl < gdept_n(ikk+1)
1066	IF( ( (zl-dta_read_z(ji,jj,ikk)) * (zl-dta_read_z(ji,jj,ikk+1)) <= 0._wp) &
1067	& .AND. (dta_read_z(ji,jj,ikk+1) /= fv_alt)) THEN
1068	zi = ( zl - dta_read_z(ji,jj,ikk) ) / &
1069	& ( dta_read_z(ji,jj,ikk+1) - dta_read_z(ji,jj,ikk) )
1070	dta(ib,1,ik) = dta_read(ji,jj,ikk) + &
1071	& ( dta_read(ji,jj,ikk+1) - dta_read(ji,jj,ikk) ) * zi
1072	ENDIF
1073	END DO
1074	ENDIF
1075	END DO
1076	END DO
1077
1078	IF(igrd == 2) THEN ! do we need to adjust the transport term?
1079	DO ib = 1, ipi
1080	jj=1+floor(REAL(map%ptr(ib)-1)/REAL(ilendta))
1081	ji=map%ptr(ib)-(jj-1)*ilendta
1082	zij = idx_bdy(ibdy)%nbi(ib,igrd)
1083	zjj = idx_bdy(ibdy)%nbj(ib,igrd)
1084	zh = SUM(dta_read_dz(ji,jj,:) )
1085	ztrans = 0._wp
1086	ztrans_new = 0._wp
1087	DO ik = 1, jpk_bdy ! calculate transport on input grid
1088	ztrans = ztrans + dta_read(ji,jj,ik) * dta_read_dz(ji,jj,ik)
1089	ENDDO
1090	DO ik = 1, ipk ! calculate transport on model grid
1091	ztrans_new = ztrans_new + dta(ib,1,ik) * e3u_n(zij,zjj,ik) * umask(zij,zjj,ik)
1092	ENDDO
1093	DO ik = 1, ipk ! make transport correction
1094	IF(fvl) THEN ! bdy data are total velocity so adjust bt transport term to match input data
1095	dta(ib,1,ik) = ( dta(ib,1,ik) + ( ztrans - ztrans_new ) * r1_hu_n(zij,zjj) ) * umask(zij,zjj,ik)
1096	ELSE ! we're just dealing with bc velocity so bt transport term should sum to zero
1097	dta(ib,1,ik) = ( dta(ib,1,ik) + ( 0._wp - ztrans_new ) * r1_hu_n(zij,zjj) ) * umask(zij,zjj,ik)
1098	ENDIF
1099	ENDDO
1100	ENDDO
1101	ENDIF
1102
1103	IF(igrd == 3) THEN ! do we need to adjust the transport term?
1104	DO ib = 1, ipi
1105	jj = 1+floor(REAL(map%ptr(ib)-1)/REAL(ilendta))
1106	ji = map%ptr(ib)-(jj-1)*ilendta
1107	zij = idx_bdy(ibdy)%nbi(ib,igrd)
1108	zjj = idx_bdy(ibdy)%nbj(ib,igrd)
1109	zh = SUM(dta_read_dz(ji,jj,:) )
1110	ztrans = 0._wp
1111	ztrans_new = 0._wp
1112	DO ik = 1, jpk_bdy ! calculate transport on input grid
1113	ztrans = ztrans + dta_read(ji,jj,ik) * dta_read_dz(ji,jj,ik)
1114	ENDDO
1115	DO ik = 1, ipk ! calculate transport on model grid
1116	ztrans_new = ztrans_new + dta(ib,1,ik) * e3v_n(zij,zjj,ik) * vmask(zij,zjj,ik)
1117	ENDDO
1118	DO ik = 1, ipk ! make transport correction
1119	IF(fvl) THEN ! bdy data are total velocity so adjust bt transport term to match input data
1120	dta(ib,1,ik) = ( dta(ib,1,ik) + ( ztrans - ztrans_new ) * r1_hv_n(zij,zjj) ) * vmask(zij,zjj,ik)
1121	ELSE ! we're just dealing with bc velocity so bt transport term should sum to zero
1122	dta(ib,1,ik) = ( dta(ib,1,ik) + ( 0._wp - ztrans_new ) * r1_hv_n(zij,zjj) ) * vmask(zij,zjj,ik)
1123	ENDIF
1124	ENDDO
1125	ENDDO
1126	ENDIF
1127
1128	ENDIF ! endif unstructured or structured
1129
1130	END SUBROUTINE fld_bdy_interp
1131
1132
1133	SUBROUTINE fld_rot( kt, sd )
1134	!!---------------------------------------------------------------------
1135	!! * ROUTINE fld_rot *
1136	!!
1137	!! ** Purpose : Vector fields may need to be rotated onto the local grid direction
1138	!!----------------------------------------------------------------------
1139	INTEGER , INTENT(in ) :: kt ! ocean time step
1140	TYPE(FLD), DIMENSION(:), INTENT(inout) :: sd ! input field related variables
1141	!
1142	INTEGER :: ju, jv, jk, jn ! loop indices
1143	INTEGER :: imf ! size of the structure sd
1144	INTEGER :: ill ! character length
1145	INTEGER :: iv ! indice of V component
1146	CHARACTER (LEN=100) :: clcomp ! dummy weight name
1147	REAL(wp), POINTER, DIMENSION(:,:) :: utmp, vtmp ! temporary arrays for vector rotation
1148	!!---------------------------------------------------------------------
1149	!
1150	CALL wrk_alloc( jpi,jpj, utmp, vtmp )
1151	!
1152	!! (sga: following code should be modified so that pairs arent searched for each time
1153	!
1154	imf = SIZE( sd )
1155	DO ju = 1, imf
1156	ill = LEN_TRIM( sd(ju)%vcomp )
1157	DO jn = 2-COUNT((/sd(ju)%ln_tint/)), 2
1158	IF( ill > 0 .AND. .NOT. sd(ju)%rotn(jn) ) THEN ! find vector rotations required
1159	IF( sd(ju)%vcomp(1:1) == 'U' ) THEN ! east-west component has symbolic name starting with 'U'
1160	! look for the north-south component which has same symbolic name but with 'U' replaced with 'V'
1161	clcomp = 'V' // sd(ju)%vcomp(2:ill) ! works even if ill == 1
1162	iv = -1
1163	DO jv = 1, imf
1164	IF( TRIM(sd(jv)%vcomp) == TRIM(clcomp) ) iv = jv
1165	END DO
1166	IF( iv > 0 ) THEN ! fields ju and iv are two components which need to be rotated together
1167	DO jk = 1, SIZE( sd(ju)%fnow, 3 )
1168	IF( sd(ju)%ln_tint )THEN
1169	CALL rot_rep( sd(ju)%fdta(:,:,jk,jn), sd(iv)%fdta(:,:,jk,jn), 'T', 'en->i', utmp(:,:) )
1170	CALL rot_rep( sd(ju)%fdta(:,:,jk,jn), sd(iv)%fdta(:,:,jk,jn), 'T', 'en->j', vtmp(:,:) )
1171	sd(ju)%fdta(:,:,jk,jn) = utmp(:,:) ; sd(iv)%fdta(:,:,jk,jn) = vtmp(:,:)
1172	ELSE
1173	CALL rot_rep( sd(ju)%fnow(:,:,jk ), sd(iv)%fnow(:,:,jk ), 'T', 'en->i', utmp(:,:) )
1174	CALL rot_rep( sd(ju)%fnow(:,:,jk ), sd(iv)%fnow(:,:,jk ), 'T', 'en->j', vtmp(:,:) )
1175	sd(ju)%fnow(:,:,jk ) = utmp(:,:) ; sd(iv)%fnow(:,:,jk ) = vtmp(:,:)
1176	ENDIF
1177	END DO
1178	sd(ju)%rotn(jn) = .TRUE. ! vector was rotated
1179	IF( lwp .AND. kt == nit000 ) WRITE(numout,*) &
1180	& 'fld_read: vector pair ('//TRIM(sd(ju)%clvar)//', '//TRIM(sd(iv)%clvar)//') rotated on to model grid'
1181	ENDIF
1182	ENDIF
1183	ENDIF
1184	END DO
1185	END DO
1186	!
1187	CALL wrk_dealloc( jpi,jpj, utmp, vtmp )
1188	!
1189	END SUBROUTINE fld_rot
1190
1191
1192	SUBROUTINE fld_clopn( sdjf, kyear, kmonth, kday, ldstop )
1193	!!---------------------------------------------------------------------
1194	!! * ROUTINE fld_clopn *
1195	!!
1196	!! ** Purpose : update the file name and close/open the files
1197	!!----------------------------------------------------------------------
1198	TYPE(FLD) , INTENT(inout) :: sdjf ! input field related variables
1199	INTEGER, OPTIONAL, INTENT(in ) :: kyear ! year value
1200	INTEGER, OPTIONAL, INTENT(in ) :: kmonth ! month value
1201	INTEGER, OPTIONAL, INTENT(in ) :: kday ! day value
1202	LOGICAL, OPTIONAL, INTENT(in ) :: ldstop ! stop if open to read a non-existing file (default = .TRUE.)
1203	!
1204	LOGICAL :: llprevyr ! are we reading previous year file?
1205	LOGICAL :: llprevmth ! are we reading previous month file?
1206	INTEGER :: iyear, imonth, iday ! first day of the current file in yyyy mm dd
1207	INTEGER :: isec_week ! number of seconds since start of the weekly file
1208	INTEGER :: indexyr ! year undex (O/1/2: previous/current/next)
1209	INTEGER :: iyear_len, imonth_len ! length (days) of iyear and imonth !
1210	CHARACTER(len = 256):: clname ! temporary file name
1211	!!----------------------------------------------------------------------
1212	IF( PRESENT(kyear) ) THEN ! use given values
1213	iyear = kyear
1214	imonth = kmonth
1215	iday = kday
1216	IF ( sdjf%cltype(1:4) == 'week' ) THEN ! find the day of the beginning of the week
1217	isec_week = ksec_week( sdjf%cltype(6:8) )- (86400 * 8 )
1218	llprevmth = isec_week > nsec_month ! longer time since beginning of the week than the month
1219	llprevyr = llprevmth .AND. nmonth == 1
1220	iyear = nyear - COUNT((/llprevyr /))
1221	imonth = nmonth - COUNT((/llprevmth/)) + 12 * COUNT((/llprevyr /))
1222	iday = nday + nmonth_len(nmonth-1) * COUNT((/llprevmth/)) - isec_week / NINT(rday)
1223	ENDIF
1224	ELSE ! use current day values
1225	IF ( sdjf%cltype(1:4) == 'week' ) THEN ! find the day of the beginning of the week
1226	isec_week = ksec_week( sdjf%cltype(6:8) ) ! second since the beginning of the week
1227	llprevmth = isec_week > nsec_month ! longer time since beginning of the week than the month
1228	llprevyr = llprevmth .AND. nmonth == 1
1229	ELSE
1230	isec_week = 0
1231	llprevmth = .FALSE.
1232	llprevyr = .FALSE.
1233	ENDIF
1234	iyear = nyear - COUNT((/llprevyr /))
1235	imonth = nmonth - COUNT((/llprevmth/)) + 12 * COUNT((/llprevyr /))
1236	iday = nday + nmonth_len(nmonth-1) * COUNT((/llprevmth/)) - isec_week / NINT(rday)
1237	ENDIF
1238
1239	! build the new filename if not climatological data
1240	clname=TRIM(sdjf%clrootname)
1241	!
1242	! note that sdjf%ln_clim is is only acting on the presence of the year in the file name
1243	IF( .NOT. sdjf%ln_clim ) THEN
1244	WRITE(clname, '(a,"_y",i4.4)' ) TRIM( sdjf%clrootname ), iyear ! add year
1245	IF( sdjf%cltype /= 'yearly' ) WRITE(clname, '(a,"m" ,i2.2)' ) TRIM( clname ), imonth ! add month
1246	ELSE
1247	! build the new filename if climatological data
1248	IF( sdjf%cltype /= 'yearly' ) WRITE(clname, '(a,"_m",i2.2)' ) TRIM( sdjf%clrootname ), imonth ! add month
1249	ENDIF
1250	IF( sdjf%cltype == 'daily' .OR. sdjf%cltype(1:4) == 'week' ) &
1251	& WRITE(clname, '(a,"d" ,i2.2)' ) TRIM( clname ), iday ! add day
1252	!
1253	IF( TRIM(clname) /= TRIM(sdjf%clname) .OR. sdjf%num == 0 ) THEN ! new file to be open
1254	!
1255	sdjf%clname = TRIM(clname)
1256	IF( sdjf%num /= 0 ) CALL iom_close( sdjf%num ) ! close file if already open
1257	CALL iom_open( sdjf%clname, sdjf%num, ldstop = ldstop, ldiof = LEN(TRIM(sdjf%wgtname)) > 0 )
1258	!
1259	! find the last record to be read -> update sdjf%nreclast
1260	indexyr = iyear - nyear + 1
1261	iyear_len = nyear_len( indexyr )
1262	SELECT CASE ( indexyr )
1263	CASE ( 0 ) ; imonth_len = 31 ! previous year -> imonth = 12
1264	CASE ( 1 ) ; imonth_len = nmonth_len(imonth)
1265	CASE ( 2 ) ; imonth_len = 31 ! next year -> imonth = 1
1266	END SELECT
1267	!
1268	! last record to be read in the current file
1269	IF ( sdjf%nfreqh == -12 ) THEN ; sdjf%nreclast = 1 ! yearly mean
1270	ELSEIF( sdjf%nfreqh == -1 ) THEN ! monthly mean
1271	IF( sdjf%cltype == 'monthly' ) THEN ; sdjf%nreclast = 1
1272	ELSE ; sdjf%nreclast = 12
1273	ENDIF
1274	ELSE ! higher frequency mean (in hours)
1275	IF( sdjf%cltype == 'monthly' ) THEN ; sdjf%nreclast = NINT( 24 * imonth_len / sdjf%nfreqh )
1276	ELSEIF( sdjf%cltype(1:4) == 'week' ) THEN ; sdjf%nreclast = NINT( 24 * 7 / sdjf%nfreqh )
1277	ELSEIF( sdjf%cltype == 'daily' ) THEN ; sdjf%nreclast = NINT( 24 / sdjf%nfreqh )
1278	ELSE ; sdjf%nreclast = NINT( 24 * iyear_len / sdjf%nfreqh )
1279	ENDIF
1280	ENDIF
1281	!
1282	ENDIF
1283	!
1284	END SUBROUTINE fld_clopn
1285
1286
1287	SUBROUTINE fld_fill( sdf, sdf_n, cdir, cdcaller, cdtitle, cdnam, knoprint )
1288	!!---------------------------------------------------------------------
1289	!! * ROUTINE fld_fill *
1290	!!
1291	!! ** Purpose : fill the data structure (sdf) with the associated information
1292	!! read in namelist (sdf_n) and control print
1293	!!----------------------------------------------------------------------
1294	TYPE(FLD) , DIMENSION(:) , INTENT(inout) :: sdf ! structure of input fields (file informations, fields read)
1295	TYPE(FLD_N), DIMENSION(:) , INTENT(in ) :: sdf_n ! array of namelist information structures
1296	CHARACTER(len=*) , INTENT(in ) :: cdir ! Root directory for location of flx files
1297	CHARACTER(len=*) , INTENT(in ) :: cdcaller ! name of the calling routine
1298	CHARACTER(len=*) , INTENT(in ) :: cdtitle ! description of the calling routine
1299	CHARACTER(len=*) , INTENT(in ) :: cdnam ! name of the namelist from which sdf_n comes
1300	INTEGER , OPTIONAL, INTENT(in ) :: knoprint ! no calling routine information printed
1301	!
1302	INTEGER :: jf ! dummy indices
1303	!!---------------------------------------------------------------------
1304	!
1305	DO jf = 1, SIZE(sdf)
1306	sdf(jf)%clrootname = TRIM( cdir )//TRIM( sdf_n(jf)%clname )
1307	sdf(jf)%clname = "not yet defined"
1308	sdf(jf)%nfreqh = sdf_n(jf)%nfreqh
1309	sdf(jf)%clvar = sdf_n(jf)%clvar
1310	sdf(jf)%ln_tint = sdf_n(jf)%ln_tint
1311	sdf(jf)%ln_clim = sdf_n(jf)%ln_clim
1312	sdf(jf)%cltype = sdf_n(jf)%cltype
1313	sdf(jf)%num = -1
1314	sdf(jf)%wgtname = " "
1315	IF( LEN( TRIM(sdf_n(jf)%wname) ) > 0 ) sdf(jf)%wgtname = TRIM( cdir )//TRIM( sdf_n(jf)%wname )
1316	sdf(jf)%lsmname = " "
1317	IF( LEN( TRIM(sdf_n(jf)%lname) ) > 0 ) sdf(jf)%lsmname = TRIM( cdir )//TRIM( sdf_n(jf)%lname )
1318	sdf(jf)%vcomp = sdf_n(jf)%vcomp
1319	sdf(jf)%rotn(:) = .TRUE. ! pretend to be rotated -> won't try to rotate data before the first call to fld_get
1320	IF( sdf(jf)%cltype(1:4) == 'week' .AND. nn_leapy == 0 ) &
1321	& CALL ctl_stop('fld_clopn: weekly file ('//TRIM(sdf(jf)%clrootname)//') needs nn_leapy = 1')
1322	IF( sdf(jf)%cltype(1:4) == 'week' .AND. sdf(jf)%ln_clim ) &
1323	& CALL ctl_stop('fld_clopn: weekly file ('//TRIM(sdf(jf)%clrootname)//') needs ln_clim = .FALSE.')
1324	sdf(jf)%nreclast = -1 ! Set to non zero default value to avoid errors, is updated to meaningful value during fld_clopn
1325	END DO
1326	!
1327	IF(lwp) THEN ! control print
1328	WRITE(numout,*)
1329	IF( .NOT.PRESENT( knoprint) ) THEN
1330	WRITE(numout,*) TRIM( cdcaller )//' : '//TRIM( cdtitle )
1331	WRITE(numout,*) (/ ('~', jf = 1, LEN_TRIM( cdcaller ) ) /)
1332	ENDIF
1333	WRITE(numout,*) ' fld_fill : fill data structure with information from namelist '//TRIM( cdnam )
1334	WRITE(numout,*) ' ~~~~~~~~'
1335	WRITE(numout,*) ' list of files and frequency (>0: in hours ; <0 in months)'
1336	DO jf = 1, SIZE(sdf)
1337	WRITE(numout,*) ' root filename: ' , TRIM( sdf(jf)%clrootname ), ' variable name: ', TRIM( sdf(jf)%clvar )
1338	WRITE(numout,*) ' frequency: ' , sdf(jf)%nfreqh , &
1339	& ' time interp: ' , sdf(jf)%ln_tint , &
1340	& ' climatology: ' , sdf(jf)%ln_clim
1341	WRITE(numout,*) ' weights: ' , TRIM( sdf(jf)%wgtname ), &
1342	& ' pairing: ' , TRIM( sdf(jf)%vcomp ), &
1343	& ' data type: ' , sdf(jf)%cltype , &
1344	& ' land/sea mask:' , TRIM( sdf(jf)%lsmname )
1345	END DO
1346	ENDIF
1347	!
1348	END SUBROUTINE fld_fill
1349
1350
1351	SUBROUTINE wgt_list( sd, kwgt )
1352	!!---------------------------------------------------------------------
1353	!! * ROUTINE wgt_list *
1354	!!
1355	!! ** Purpose : search array of WGTs and find a weights file entry,
1356	!! or return a new one adding it to the end if new entry.
1357	!! the weights data is read in and restructured (fld_weight)
1358	!!----------------------------------------------------------------------
1359	TYPE( FLD ), INTENT(in ) :: sd ! field with name of weights file
1360	INTEGER , INTENT(inout) :: kwgt ! index of weights
1361	!
1362	INTEGER :: kw, nestid ! local integer
1363	LOGICAL :: found ! local logical
1364	!!----------------------------------------------------------------------
1365	!
1366	!! search down linked list
1367	!! weights filename is either present or we hit the end of the list
1368	found = .FALSE.
1369	!
1370	!! because agrif nest part of filenames are now added in iom_open
1371	!! to distinguish between weights files on the different grids, need to track
1372	!! nest number explicitly
1373	nestid = 0
1374	#if defined key_agrif
1375	nestid = Agrif_Fixed()
1376	#endif
1377	DO kw = 1, nxt_wgt-1
1378	IF( TRIM(ref_wgts(kw)%wgtname) == TRIM(sd%wgtname) .AND. &
1379	ref_wgts(kw)%nestid == nestid) THEN
1380	kwgt = kw
1381	found = .TRUE.
1382	EXIT
1383	ENDIF
1384	END DO
1385	IF( .NOT.found ) THEN
1386	kwgt = nxt_wgt
1387	CALL fld_weight( sd )
1388	ENDIF
1389	!
1390	END SUBROUTINE wgt_list
1391
1392
1393	SUBROUTINE wgt_print( )
1394	!!---------------------------------------------------------------------
1395	!! * ROUTINE wgt_print *
1396	!!
1397	!! ** Purpose : print the list of known weights
1398	!!----------------------------------------------------------------------
1399	INTEGER :: kw !
1400	!!----------------------------------------------------------------------
1401	!
1402	DO kw = 1, nxt_wgt-1
1403	WRITE(numout,*) 'weight file: ',TRIM(ref_wgts(kw)%wgtname)
1404	WRITE(numout,*) ' ddims: ',ref_wgts(kw)%ddims(1),ref_wgts(kw)%ddims(2)
1405	WRITE(numout,*) ' numwgt: ',ref_wgts(kw)%numwgt
1406	WRITE(numout,*) ' jpiwgt: ',ref_wgts(kw)%jpiwgt
1407	WRITE(numout,*) ' jpjwgt: ',ref_wgts(kw)%jpjwgt
1408	WRITE(numout,*) ' botleft: ',ref_wgts(kw)%botleft
1409	WRITE(numout,*) ' topright: ',ref_wgts(kw)%topright
1410	IF( ref_wgts(kw)%cyclic ) THEN
1411	WRITE(numout,*) ' cyclical'
1412	IF( ref_wgts(kw)%overlap > 0 ) WRITE(numout,*) ' with overlap of ', ref_wgts(kw)%overlap
1413	ELSE
1414	WRITE(numout,*) ' not cyclical'
1415	ENDIF
1416	IF( ASSOCIATED(ref_wgts(kw)%data_wgt) ) WRITE(numout,*) ' allocated'
1417	END DO
1418	!
1419	END SUBROUTINE wgt_print
1420
1421
1422	SUBROUTINE fld_weight( sd )
1423	!!---------------------------------------------------------------------
1424	!! * ROUTINE fld_weight *
1425	!!
1426	!! ** Purpose : create a new WGT structure and fill in data from file,
1427	!! restructuring as required
1428	!!----------------------------------------------------------------------
1429	TYPE( FLD ), INTENT(in) :: sd ! field with name of weights file
1430	!!
1431	INTEGER :: jn ! dummy loop indices
1432	INTEGER :: inum ! local logical unit
1433	INTEGER :: id ! local variable id
1434	INTEGER :: ipk ! local vertical dimension
1435	INTEGER :: zwrap ! local integer
1436	LOGICAL :: cyclical !
1437	CHARACTER (len=5) :: aname !
1438	INTEGER , DIMENSION(:), ALLOCATABLE :: ddims
1439	INTEGER , POINTER, DIMENSION(:,:) :: data_src
1440	REAL(wp), POINTER, DIMENSION(:,:) :: data_tmp
1441	!!----------------------------------------------------------------------
1442	!
1443	CALL wrk_alloc( jpi,jpj, data_src ) ! integer
1444	CALL wrk_alloc( jpi,jpj, data_tmp )
1445	!
1446	IF( nxt_wgt > tot_wgts ) THEN
1447	CALL ctl_stop("fld_weight: weights array size exceeded, increase tot_wgts")
1448	ENDIF
1449	!
1450	!! new weights file entry, add in extra information
1451	!! a weights file represents a 2D grid of a certain shape, so we assume that the current
1452	!! input data file is representative of all other files to be opened and processed with the
1453	!! current weights file
1454
1455	!! open input data file (non-model grid)
1456	CALL iom_open( sd%clname, inum, ldiof = LEN(TRIM(sd%wgtname)) > 0 )
1457
1458	!! get dimensions
1459	IF ( SIZE(sd%fnow, 3) > 1 ) THEN
1460	ALLOCATE( ddims(4) )
1461	ELSE
1462	ALLOCATE( ddims(3) )
1463	ENDIF
1464	id = iom_varid( inum, sd%clvar, ddims )
1465
1466	!! close it
1467	CALL iom_close( inum )
1468
1469	!! now open the weights file
1470
1471	CALL iom_open ( sd%wgtname, inum ) ! interpolation weights
1472	IF ( inum > 0 ) THEN
1473
1474	!! determine whether we have an east-west cyclic grid
1475	!! from global attribute called "ew_wrap" in the weights file
1476	!! note that if not found, iom_getatt returns -999 and cyclic with no overlap is assumed
1477	!! since this is the most common forcing configuration
1478
1479	CALL iom_getatt(inum, 'ew_wrap', zwrap)
1480	IF( zwrap >= 0 ) THEN
1481	cyclical = .TRUE.
1482	ELSE IF( zwrap == -999 ) THEN
1483	cyclical = .TRUE.
1484	zwrap = 0
1485	ELSE
1486	cyclical = .FALSE.
1487	ENDIF
1488
1489	ref_wgts(nxt_wgt)%ddims(1) = ddims(1)
1490	ref_wgts(nxt_wgt)%ddims(2) = ddims(2)
1491	ref_wgts(nxt_wgt)%wgtname = sd%wgtname
1492	ref_wgts(nxt_wgt)%overlap = zwrap
1493	ref_wgts(nxt_wgt)%cyclic = cyclical
1494	ref_wgts(nxt_wgt)%nestid = 0
1495	#if defined key_agrif
1496	ref_wgts(nxt_wgt)%nestid = Agrif_Fixed()
1497	#endif
1498	!! weights file is stored as a set of weights (wgt01->wgt04 or wgt01->wgt16)
1499	!! for each weight wgtNN there is an integer array srcNN which gives the point in
1500	!! the input data grid which is to be multiplied by the weight
1501	!! they are both arrays on the model grid so the result of the multiplication is
1502	!! added into an output array on the model grid as a running sum
1503
1504	!! two possible cases: bilinear (4 weights) or bicubic (16 weights)
1505	id = iom_varid(inum, 'src05', ldstop=.FALSE.)
1506	IF( id <= 0) THEN
1507	ref_wgts(nxt_wgt)%numwgt = 4
1508	ELSE
1509	ref_wgts(nxt_wgt)%numwgt = 16
1510	ENDIF
1511
1512	ALLOCATE( ref_wgts(nxt_wgt)%data_jpi(jpi,jpj,4) )
1513	ALLOCATE( ref_wgts(nxt_wgt)%data_jpj(jpi,jpj,4) )
1514	ALLOCATE( ref_wgts(nxt_wgt)%data_wgt(jpi,jpj,ref_wgts(nxt_wgt)%numwgt) )
1515
1516	DO jn = 1,4
1517	aname = ' '
1518	WRITE(aname,'(a3,i2.2)') 'src',jn
1519	data_tmp(:,:) = 0
1520	CALL iom_get ( inum, jpdom_data, aname, data_tmp(:,:) )
1521	data_src(:,:) = INT(data_tmp(:,:))
1522	ref_wgts(nxt_wgt)%data_jpj(:,:,jn) = 1 + (data_src(:,:)-1) / ref_wgts(nxt_wgt)%ddims(1)
1523	ref_wgts(nxt_wgt)%data_jpi(:,:,jn) = data_src(:,:) - ref_wgts(nxt_wgt)%ddims(1)*(ref_wgts(nxt_wgt)%data_jpj(:,:,jn)-1)
1524	END DO
1525
1526	DO jn = 1, ref_wgts(nxt_wgt)%numwgt
1527	aname = ' '
1528	WRITE(aname,'(a3,i2.2)') 'wgt',jn
1529	ref_wgts(nxt_wgt)%data_wgt(:,:,jn) = 0.0
1530	CALL iom_get ( inum, jpdom_data, aname, ref_wgts(nxt_wgt)%data_wgt(:,:,jn) )
1531	END DO
1532	CALL iom_close (inum)
1533
1534	! find min and max indices in grid
1535	ref_wgts(nxt_wgt)%botleft(1) = MINVAL(ref_wgts(nxt_wgt)%data_jpi(:,:,:))
1536	ref_wgts(nxt_wgt)%botleft(2) = MINVAL(ref_wgts(nxt_wgt)%data_jpj(:,:,:))
1537	ref_wgts(nxt_wgt)%topright(1) = MAXVAL(ref_wgts(nxt_wgt)%data_jpi(:,:,:))
1538	ref_wgts(nxt_wgt)%topright(2) = MAXVAL(ref_wgts(nxt_wgt)%data_jpj(:,:,:))
1539
1540	! and therefore dimensions of the input box
1541	ref_wgts(nxt_wgt)%jpiwgt = ref_wgts(nxt_wgt)%topright(1) - ref_wgts(nxt_wgt)%botleft(1) + 1
1542	ref_wgts(nxt_wgt)%jpjwgt = ref_wgts(nxt_wgt)%topright(2) - ref_wgts(nxt_wgt)%botleft(2) + 1
1543
1544	! shift indexing of source grid
1545	ref_wgts(nxt_wgt)%data_jpi(:,:,:) = ref_wgts(nxt_wgt)%data_jpi(:,:,:) - ref_wgts(nxt_wgt)%botleft(1) + 1
1546	ref_wgts(nxt_wgt)%data_jpj(:,:,:) = ref_wgts(nxt_wgt)%data_jpj(:,:,:) - ref_wgts(nxt_wgt)%botleft(2) + 1
1547
1548	! create input grid, give it a halo to allow gradient calculations
1549	! SA: +3 stencil is a patch to avoid out-of-bound computation in some configuration.
1550	! a more robust solution will be given in next release
1551	ipk = SIZE(sd%fnow, 3)
1552	ALLOCATE( ref_wgts(nxt_wgt)%fly_dta(ref_wgts(nxt_wgt)%jpiwgt+3, ref_wgts(nxt_wgt)%jpjwgt+3 ,ipk) )
1553	IF( ref_wgts(nxt_wgt)%cyclic ) ALLOCATE( ref_wgts(nxt_wgt)%col(1,ref_wgts(nxt_wgt)%jpjwgt+3,ipk) )
1554	!
1555	nxt_wgt = nxt_wgt + 1
1556	!
1557	ELSE
1558	CALL ctl_stop( ' fld_weight : unable to read the file ' )
1559	ENDIF
1560
1561	DEALLOCATE (ddims )
1562
1563	CALL wrk_dealloc( jpi,jpj, data_src ) ! integer
1564	CALL wrk_dealloc( jpi,jpj, data_tmp )
1565	!
1566	END SUBROUTINE fld_weight
1567
1568
1569	SUBROUTINE apply_seaoverland( clmaskfile, zfieldo, jpi1_lsm, jpi2_lsm, jpj1_lsm, &
1570	& jpj2_lsm, itmpi, itmpj, itmpz, rec1_lsm, recn_lsm )
1571	!!---------------------------------------------------------------------
1572	!! * ROUTINE apply_seaoverland *
1573	!!
1574	!! ** Purpose : avoid spurious fluxes in coastal or near-coastal areas
1575	!! due to the wrong usage of "land" values from the coarse
1576	!! atmospheric model when spatial interpolation is required
1577	!! D. Delrosso INGV
1578	!!----------------------------------------------------------------------
1579	INTEGER, INTENT(in ) :: itmpi,itmpj,itmpz ! lengths
1580	INTEGER, INTENT(in ) :: jpi1_lsm,jpi2_lsm,jpj1_lsm,jpj2_lsm ! temporary indices
1581	INTEGER, DIMENSION(3), INTENT(in ) :: rec1_lsm,recn_lsm ! temporary arrays for start and length
1582	REAL(wp),DIMENSION (:,:,:),INTENT(inout) :: zfieldo ! input/output array for seaoverland application
1583	CHARACTER (len=100), INTENT(in ) :: clmaskfile ! land/sea mask file name
1584	!
1585	INTEGER :: inum,jni,jnj,jnz,jc ! local indices
1586	REAL(wp),DIMENSION (:,:,:),ALLOCATABLE :: zslmec1 ! local array for land point detection
1587	REAL(wp),DIMENSION (:,:), ALLOCATABLE :: zfieldn ! array of forcing field with undeff for land points
1588	REAL(wp),DIMENSION (:,:), ALLOCATABLE :: zfield ! array of forcing field
1589	!!---------------------------------------------------------------------
1590	!
1591	ALLOCATE ( zslmec1(itmpi,itmpj,itmpz), zfieldn(itmpi,itmpj), zfield(itmpi,itmpj) )
1592	!
1593	! Retrieve the land sea mask data
1594	CALL iom_open( clmaskfile, inum )
1595	SELECT CASE( SIZE(zfieldo(jpi1_lsm:jpi2_lsm,jpj1_lsm:jpj2_lsm,:),3) )
1596	CASE(1)
1597	CALL iom_get( inum, jpdom_unknown, 'LSM', zslmec1(jpi1_lsm:jpi2_lsm,jpj1_lsm:jpj2_lsm,1), 1, rec1_lsm, recn_lsm)
1598	CASE DEFAULT
1599	CALL iom_get( inum, jpdom_unknown, 'LSM', zslmec1(jpi1_lsm:jpi2_lsm,jpj1_lsm:jpj2_lsm,:), 1, rec1_lsm, recn_lsm)
1600	END SELECT
1601	CALL iom_close( inum )
1602	!
1603	DO jnz=1,rec1_lsm(3) !! Loop over k dimension
1604	!
1605	DO jni = 1, itmpi !! copy the original field into a tmp array
1606	DO jnj = 1, itmpj !! substituting undeff over land points
1607	zfieldn(jni,jnj) = zfieldo(jni,jnj,jnz)
1608	IF( zslmec1(jni,jnj,jnz) == 1. ) zfieldn(jni,jnj) = undeff_lsm
1609	END DO
1610	END DO
1611	!
1612	CALL seaoverland( zfieldn, itmpi, itmpj, zfield )
1613	DO jc = 1, nn_lsm
1614	CALL seaoverland( zfield, itmpi, itmpj, zfield )
1615	END DO
1616	!
1617	! Check for Undeff and substitute original values
1618	IF( ANY(zfield==undeff_lsm) ) THEN
1619	DO jni = 1, itmpi
1620	DO jnj = 1, itmpj
1621	IF( zfield(jni,jnj)==undeff_lsm ) zfield(jni,jnj) = zfieldo(jni,jnj,jnz)
1622	END DO
1623	END DO
1624	ENDIF
1625	!
1626	zfieldo(:,:,jnz) = zfield(:,:)
1627	!
1628	END DO !! End Loop over k dimension
1629	!
1630	DEALLOCATE ( zslmec1, zfieldn, zfield )
1631	!
1632	END SUBROUTINE apply_seaoverland
1633
1634
1635	SUBROUTINE seaoverland( zfieldn, ileni, ilenj, zfield )
1636	!!---------------------------------------------------------------------
1637	!! * ROUTINE seaoverland *
1638	!!
1639	!! ** Purpose : create shifted matrices for seaoverland application
1640	!! D. Delrosso INGV
1641	!!----------------------------------------------------------------------
1642	INTEGER , INTENT(in ) :: ileni,ilenj ! lengths
1643	REAL, DIMENSION (ileni,ilenj), INTENT(in ) :: zfieldn ! array of forcing field with undeff for land points
1644	REAL, DIMENSION (ileni,ilenj), INTENT( out) :: zfield ! array of forcing field
1645	!
1646	REAL , DIMENSION (ileni,ilenj) :: zmat1, zmat2, zmat3, zmat4 ! local arrays
1647	REAL , DIMENSION (ileni,ilenj) :: zmat5, zmat6, zmat7, zmat8 ! - -
1648	REAL , DIMENSION (ileni,ilenj) :: zlsm2d ! - -
1649	REAL , DIMENSION (ileni,ilenj,8) :: zlsm3d ! - -
1650	LOGICAL, DIMENSION (ileni,ilenj,8) :: ll_msknan3d ! logical mask for undeff detection
1651	LOGICAL, DIMENSION (ileni,ilenj) :: ll_msknan2d ! logical mask for undeff detection
1652	!!----------------------------------------------------------------------
1653	zmat8 = eoshift( zfieldn , SHIFT=-1 , BOUNDARY = (/zfieldn(:,1)/) , DIM=2 )
1654	zmat1 = eoshift( zmat8 , SHIFT=-1 , BOUNDARY = (/zmat8(1,:)/) , DIM=1 )
1655	zmat2 = eoshift( zfieldn , SHIFT=-1 , BOUNDARY = (/zfieldn(1,:)/) , DIM=1 )
1656	zmat4 = eoshift( zfieldn , SHIFT= 1 , BOUNDARY = (/zfieldn(:,ilenj)/) , DIM=2 )
1657	zmat3 = eoshift( zmat4 , SHIFT=-1 , BOUNDARY = (/zmat4(1,:)/) , DIM=1 )
1658	zmat5 = eoshift( zmat4 , SHIFT= 1 , BOUNDARY = (/zmat4(ileni,:)/) , DIM=1 )
1659	zmat6 = eoshift( zfieldn , SHIFT= 1 , BOUNDARY = (/zfieldn(ileni,:)/) , DIM=1 )
1660	zmat7 = eoshift( zmat8 , SHIFT= 1 , BOUNDARY = (/zmat8(ileni,:)/) , DIM=1 )
1661	!
1662	zlsm3d = RESHAPE( (/ zmat1, zmat2, zmat3, zmat4, zmat5, zmat6, zmat7, zmat8 /), (/ ileni, ilenj, 8 /))
1663	ll_msknan3d = .NOT.( zlsm3d == undeff_lsm )
1664	ll_msknan2d = .NOT.( zfieldn == undeff_lsm ) ! FALSE where is Undeff (land)
1665	zlsm2d = SUM( zlsm3d, 3 , ll_msknan3d ) / MAX( 1 , COUNT( ll_msknan3d , 3 ) )
1666	WHERE( COUNT( ll_msknan3d , 3 ) == 0._wp ) zlsm2d = undeff_lsm
1667	zfield = MERGE( zfieldn, zlsm2d, ll_msknan2d )
1668	!
1669	END SUBROUTINE seaoverland
1670
1671
1672	SUBROUTINE fld_interp( num, clvar, kw, kk, dta, &
1673	& nrec, lsmfile)
1674	!!---------------------------------------------------------------------
1675	!! * ROUTINE fld_interp *
1676	!!
1677	!! ** Purpose : apply weights to input gridded data to create data
1678	!! on model grid
1679	!!----------------------------------------------------------------------
1680	INTEGER , INTENT(in ) :: num ! stream number
1681	CHARACTER(LEN=*) , INTENT(in ) :: clvar ! variable name
1682	INTEGER , INTENT(in ) :: kw ! weights number
1683	INTEGER , INTENT(in ) :: kk ! vertical dimension of kk
1684	REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: dta ! output field on model grid
1685	INTEGER , INTENT(in ) :: nrec ! record number to read (ie time slice)
1686	CHARACTER(LEN=*) , INTENT(in ) :: lsmfile ! land sea mask file name
1687	!
1688	INTEGER, DIMENSION(3) :: rec1, recn ! temporary arrays for start and length
1689	INTEGER, DIMENSION(3) :: rec1_lsm, recn_lsm ! temporary arrays for start and length in case of seaoverland
1690	INTEGER :: ii_lsm1,ii_lsm2,ij_lsm1,ij_lsm2 ! temporary indices
1691	INTEGER :: jk, jn, jm, jir, jjr ! loop counters
1692	INTEGER :: ni, nj ! lengths
1693	INTEGER :: jpimin,jpiwid ! temporary indices
1694	INTEGER :: jpimin_lsm,jpiwid_lsm ! temporary indices
1695	INTEGER :: jpjmin,jpjwid ! temporary indices
1696	INTEGER :: jpjmin_lsm,jpjwid_lsm ! temporary indices
1697	INTEGER :: jpi1,jpi2,jpj1,jpj2 ! temporary indices
1698	INTEGER :: jpi1_lsm,jpi2_lsm,jpj1_lsm,jpj2_lsm ! temporary indices
1699	INTEGER :: itmpi,itmpj,itmpz ! lengths
1700	REAL(wp),DIMENSION(:,:,:), ALLOCATABLE :: ztmp_fly_dta ! local array of values on input grid
1701	!!----------------------------------------------------------------------
1702	!
1703	!! for weighted interpolation we have weights at four corners of a box surrounding
1704	!! a model grid point, each weight is multiplied by a grid value (bilinear case)
1705	!! or by a grid value and gradients at the corner point (bicubic case)
1706	!! so we need to have a 4 by 4 subgrid surrounding each model point to cover both cases
1707
1708	!! sub grid from non-model input grid which encloses all grid points in this nemo process
1709	jpimin = ref_wgts(kw)%botleft(1)
1710	jpjmin = ref_wgts(kw)%botleft(2)
1711	jpiwid = ref_wgts(kw)%jpiwgt
1712	jpjwid = ref_wgts(kw)%jpjwgt
1713
1714	!! when reading in, expand this sub-grid by one halo point all the way round for calculating gradients
1715	rec1(1) = MAX( jpimin-1, 1 )
1716	rec1(2) = MAX( jpjmin-1, 1 )
1717	rec1(3) = 1
1718	recn(1) = MIN( jpiwid+2, ref_wgts(kw)%ddims(1)-rec1(1)+1 )
1719	recn(2) = MIN( jpjwid+2, ref_wgts(kw)%ddims(2)-rec1(2)+1 )
1720	recn(3) = kk
1721
1722	!! where we need to put it in the non-nemo grid fly_dta
1723	!! note that jpi1 and jpj1 only differ from 1 when jpimin and jpjmin are 1
1724	!! (ie at the extreme west or south of the whole input grid) and similarly for jpi2 and jpj2
1725	jpi1 = 2 + rec1(1) - jpimin
1726	jpj1 = 2 + rec1(2) - jpjmin
1727	jpi2 = jpi1 + recn(1) - 1
1728	jpj2 = jpj1 + recn(2) - 1
1729
1730
1731	IF( LEN( TRIM(lsmfile) ) > 0 ) THEN
1732	!! indeces for ztmp_fly_dta
1733	! --------------------------
1734	rec1_lsm(1)=MAX(rec1(1)-nn_lsm,1) ! starting index for enlarged external data, x direction
1735	rec1_lsm(2)=MAX(rec1(2)-nn_lsm,1) ! starting index for enlarged external data, y direction
1736	rec1_lsm(3) = 1 ! vertical dimension
1737	recn_lsm(1)=MIN(rec1(1)-rec1_lsm(1)+recn(1)+nn_lsm,ref_wgts(kw)%ddims(1)-rec1_lsm(1)) ! n points in x direction
1738	recn_lsm(2)=MIN(rec1(2)-rec1_lsm(2)+recn(2)+nn_lsm,ref_wgts(kw)%ddims(2)-rec1_lsm(2)) ! n points in y direction
1739	recn_lsm(3) = kk ! number of vertical levels in the input file
1740
1741	! Avoid out of bound
1742	jpimin_lsm = MAX( rec1_lsm(1)+1, 1 )
1743	jpjmin_lsm = MAX( rec1_lsm(2)+1, 1 )
1744	jpiwid_lsm = MIN( recn_lsm(1)-2,ref_wgts(kw)%ddims(1)-rec1(1)+1)
1745	jpjwid_lsm = MIN( recn_lsm(2)-2,ref_wgts(kw)%ddims(2)-rec1(2)+1)
1746
1747	jpi1_lsm = 2+rec1_lsm(1)-jpimin_lsm
1748	jpj1_lsm = 2+rec1_lsm(2)-jpjmin_lsm
1749	jpi2_lsm = jpi1_lsm + recn_lsm(1) - 1
1750	jpj2_lsm = jpj1_lsm + recn_lsm(2) - 1
1751
1752
1753	itmpi=jpi2_lsm-jpi1_lsm+1
1754	itmpj=jpj2_lsm-jpj1_lsm+1
1755	itmpz=kk
1756	ALLOCATE(ztmp_fly_dta(itmpi,itmpj,itmpz))
1757	ztmp_fly_dta(:,:,:) = 0.0
1758	SELECT CASE( SIZE(ztmp_fly_dta(jpi1_lsm:jpi2_lsm,jpj1_lsm:jpj2_lsm,:),3) )
1759	CASE(1)
1760	CALL iom_get( num, jpdom_unknown, clvar, ztmp_fly_dta(jpi1_lsm:jpi2_lsm,jpj1_lsm:jpj2_lsm,1), &
1761	& nrec, rec1_lsm, recn_lsm)
1762	CASE DEFAULT
1763	CALL iom_get( num, jpdom_unknown, clvar, ztmp_fly_dta(jpi1_lsm:jpi2_lsm,jpj1_lsm:jpj2_lsm,:), &
1764	& nrec, rec1_lsm, recn_lsm)
1765	END SELECT
1766	CALL apply_seaoverland(lsmfile,ztmp_fly_dta(jpi1_lsm:jpi2_lsm,jpj1_lsm:jpj2_lsm,:), &
1767	& jpi1_lsm,jpi2_lsm,jpj1_lsm,jpj2_lsm, &
1768	& itmpi,itmpj,itmpz,rec1_lsm,recn_lsm)
1769
1770
1771	! Relative indeces for remapping
1772	ii_lsm1 = (rec1(1)-rec1_lsm(1))+1
1773	ii_lsm2 = (ii_lsm1+recn(1))-1
1774	ij_lsm1 = (rec1(2)-rec1_lsm(2))+1
1775	ij_lsm2 = (ij_lsm1+recn(2))-1
1776
1777	ref_wgts(kw)%fly_dta(:,:,:) = 0.0
1778	ref_wgts(kw)%fly_dta(jpi1:jpi2,jpj1:jpj2,:) = ztmp_fly_dta(ii_lsm1:ii_lsm2,ij_lsm1:ij_lsm2,:)
1779	DEALLOCATE(ztmp_fly_dta)
1780
1781	ELSE
1782
1783	ref_wgts(kw)%fly_dta(:,:,:) = 0.0
1784	SELECT CASE( SIZE(ref_wgts(kw)%fly_dta(jpi1:jpi2,jpj1:jpj2,:),3) )
1785	CASE(1)
1786	CALL iom_get( num, jpdom_unknown, clvar, ref_wgts(kw)%fly_dta(jpi1:jpi2,jpj1:jpj2,1), nrec, rec1, recn)
1787	CASE DEFAULT
1788	CALL iom_get( num, jpdom_unknown, clvar, ref_wgts(kw)%fly_dta(jpi1:jpi2,jpj1:jpj2,:), nrec, rec1, recn)
1789	END SELECT
1790	ENDIF
1791
1792
1793	!! first four weights common to both bilinear and bicubic
1794	!! data_jpi, data_jpj have already been shifted to (1,1) corresponding to botleft
1795	!! note that we have to offset by 1 into fly_dta array because of halo
1796	dta(:,:,:) = 0.0
1797	DO jk = 1,4
1798	DO jn = 1, jpj
1799	DO jm = 1,jpi
1800	ni = ref_wgts(kw)%data_jpi(jm,jn,jk)
1801	nj = ref_wgts(kw)%data_jpj(jm,jn,jk)
1802	dta(jm,jn,:) = dta(jm,jn,:) + ref_wgts(kw)%data_wgt(jm,jn,jk) * ref_wgts(kw)%fly_dta(ni+1,nj+1,:)
1803	END DO
1804	END DO
1805	END DO
1806
1807	IF (ref_wgts(kw)%numwgt .EQ. 16) THEN
1808
1809	!! fix up halo points that we couldnt read from file
1810	IF( jpi1 == 2 ) THEN
1811	ref_wgts(kw)%fly_dta(jpi1-1,:,:) = ref_wgts(kw)%fly_dta(jpi1,:,:)
1812	ENDIF
1813	IF( jpi2 + jpimin - 1 == ref_wgts(kw)%ddims(1)+1 ) THEN
1814	ref_wgts(kw)%fly_dta(jpi2+1,:,:) = ref_wgts(kw)%fly_dta(jpi2,:,:)
1815	ENDIF
1816	IF( jpj1 == 2 ) THEN
1817	ref_wgts(kw)%fly_dta(:,jpj1-1,:) = ref_wgts(kw)%fly_dta(:,jpj1,:)
1818	ENDIF
1819	IF( jpj2 + jpjmin - 1 == ref_wgts(kw)%ddims(2)+1 .AND. jpj2 .lt. jpjwid+2 ) THEN
1820	ref_wgts(kw)%fly_dta(:,jpj2+1,:) = 2.0*ref_wgts(kw)%fly_dta(:,jpj2,:) - ref_wgts(kw)%fly_dta(:,jpj2-1,:)
1821	ENDIF
1822
1823	!! if data grid is cyclic we can do better on east-west edges
1824	!! but have to allow for whether first and last columns are coincident
1825	IF( ref_wgts(kw)%cyclic ) THEN
1826	rec1(2) = MAX( jpjmin-1, 1 )
1827	recn(1) = 1
1828	recn(2) = MIN( jpjwid+2, ref_wgts(kw)%ddims(2)-rec1(2)+1 )
1829	jpj1 = 2 + rec1(2) - jpjmin
1830	jpj2 = jpj1 + recn(2) - 1
1831	IF( jpi1 == 2 ) THEN
1832	rec1(1) = ref_wgts(kw)%ddims(1) - ref_wgts(kw)%overlap
1833	SELECT CASE( SIZE( ref_wgts(kw)%col(:,jpj1:jpj2,:),3) )
1834	CASE(1)
1835	CALL iom_get( num, jpdom_unknown, clvar, ref_wgts(kw)%col(:,jpj1:jpj2,1), nrec, rec1, recn)
1836	CASE DEFAULT
1837	CALL iom_get( num, jpdom_unknown, clvar, ref_wgts(kw)%col(:,jpj1:jpj2,:), nrec, rec1, recn)
1838	END SELECT
1839	ref_wgts(kw)%fly_dta(jpi1-1,jpj1:jpj2,:) = ref_wgts(kw)%col(1,jpj1:jpj2,:)
1840	ENDIF
1841	IF( jpi2 + jpimin - 1 == ref_wgts(kw)%ddims(1)+1 ) THEN
1842	rec1(1) = 1 + ref_wgts(kw)%overlap
1843	SELECT CASE( SIZE( ref_wgts(kw)%col(:,jpj1:jpj2,:),3) )
1844	CASE(1)
1845	CALL iom_get( num, jpdom_unknown, clvar, ref_wgts(kw)%col(:,jpj1:jpj2,1), nrec, rec1, recn)
1846	CASE DEFAULT
1847	CALL iom_get( num, jpdom_unknown, clvar, ref_wgts(kw)%col(:,jpj1:jpj2,:), nrec, rec1, recn)
1848	END SELECT
1849	ref_wgts(kw)%fly_dta(jpi2+1,jpj1:jpj2,:) = ref_wgts(kw)%col(1,jpj1:jpj2,:)
1850	ENDIF
1851	ENDIF
1852
1853	! gradient in the i direction
1854	DO jk = 1,4
1855	DO jn = 1, jpj
1856	DO jm = 1,jpi
1857	ni = ref_wgts(kw)%data_jpi(jm,jn,jk)
1858	nj = ref_wgts(kw)%data_jpj(jm,jn,jk)
1859	dta(jm,jn,:) = dta(jm,jn,:) + ref_wgts(kw)%data_wgt(jm,jn,jk+4) * 0.5 * &
1860	(ref_wgts(kw)%fly_dta(ni+2,nj+1,:) - ref_wgts(kw)%fly_dta(ni,nj+1,:))
1861	END DO
1862	END DO
1863	END DO
1864
1865	! gradient in the j direction
1866	DO jk = 1,4
1867	DO jn = 1, jpj
1868	DO jm = 1,jpi
1869	ni = ref_wgts(kw)%data_jpi(jm,jn,jk)
1870	nj = ref_wgts(kw)%data_jpj(jm,jn,jk)
1871	dta(jm,jn,:) = dta(jm,jn,:) + ref_wgts(kw)%data_wgt(jm,jn,jk+8) * 0.5 * &
1872	(ref_wgts(kw)%fly_dta(ni+1,nj+2,:) - ref_wgts(kw)%fly_dta(ni+1,nj,:))
1873	END DO
1874	END DO
1875	END DO
1876
1877	! gradient in the ij direction
1878	DO jk = 1,4
1879	DO jn = 1, jpj
1880	DO jm = 1,jpi
1881	ni = ref_wgts(kw)%data_jpi(jm,jn,jk)
1882	nj = ref_wgts(kw)%data_jpj(jm,jn,jk)
1883	dta(jm,jn,:) = dta(jm,jn,:) + ref_wgts(kw)%data_wgt(jm,jn,jk+12) * 0.25 * ( &
1884	(ref_wgts(kw)%fly_dta(ni+2,nj+2,:) - ref_wgts(kw)%fly_dta(ni ,nj+2,:)) - &
1885	(ref_wgts(kw)%fly_dta(ni+2,nj ,:) - ref_wgts(kw)%fly_dta(ni ,nj ,:)))
1886	END DO
1887	END DO
1888	END DO
1889	!
1890	END IF
1891	!
1892	END SUBROUTINE fld_interp
1893
1894
1895	FUNCTION ksec_week( cdday )
1896	!!---------------------------------------------------------------------
1897	!! * FUNCTION kshift_week *
1898	!!
1899	!! ** Purpose : return the first 3 letters of the first day of the weekly file
1900	!!---------------------------------------------------------------------
1901	CHARACTER(len=*), INTENT(in) :: cdday ! first 3 letters of the first day of the weekly file
1902	!!
1903	INTEGER :: ksec_week ! output variable
1904	INTEGER :: ijul, ishift ! local integer
1905	CHARACTER(len=3),DIMENSION(7) :: cl_week
1906	!!----------------------------------------------------------------------
1907	cl_week = (/"sun","sat","fri","thu","wed","tue","mon"/)
1908	DO ijul = 1, 7
1909	IF( cl_week(ijul) == TRIM(cdday) ) EXIT
1910	END DO
1911	IF( ijul .GT. 7 ) CALL ctl_stop( 'ksec_week: wrong day for sdjf%cltype(6:8): '//TRIM(cdday) )
1912	!
1913	ishift = ijul * NINT(rday)
1914	!
1915	ksec_week = nsec_week + ishift
1916	ksec_week = MOD( ksec_week, 7*NINT(rday) )
1917	!
1918	END FUNCTION ksec_week
1919
1920	!!======================================================================
1921	END MODULE fldread

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