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cpl.F90 in trunk/NEMO/OPA_SRC – NEMO

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source: trunk/NEMO/OPA_SRC/cpl.F90 @ 3

Last change on this file since 3 was 3, checked in by opalod, 20 years ago
Initial revision
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 29.0 KB

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1	MODULE cpl
2	!!======================================================================
3	!! * MODULE cpl *
4	!! Coupled O/A : coupled ocean-atmosphere case using OASIS
5	!!=====================================================================
6	#if defined key_coupled
7	!!----------------------------------------------------------------------
8	!! 'key_coupled' coupled Ocean/Atmosphere
9	!!----------------------------------------------------------------------
10	!! cpl_init : initialization of coupled mode communication
11	!! cpl_read : read the coupled namelist
12	!! cpl_step : exchange fields in coupled mode
13	!!----------------------------------------------------------------------
14	!! * Modules used
15	USE oce ! ocean dynamics and tracers
16	USE dom_oce ! ocean space and time domain
17	USE in_out_manager ! I/O manager
18	USE cpl_oce ! coupled exchange variables (???)
19	USE flx_oce ! in case of ice
20	USE ocfzpt ! ocean freezing point
21
22	IMPLICIT NONE
23	PRIVATE
24
25	!! Routine accessibility
26	PUBLIC cpl_init
27	PUBLIC cpl_step ! routine called by step.F90
28	!!----------------------------------------------------------------------
29	!! OPA 9.0 , LODYC-IPSL (2003)
30	!!----------------------------------------------------------------------
31
32	CONTAINS
33
34	SUBROUTINE cpl_init( kastp, kexch, kstep )
35	!!---------------------------------------------------------------------
36	!! * ROUTINE cpl_init *
37	!!
38	!! ** Purpose : Initialize coupled mode communication for ocean
39	!! exchange process identifiers and timestep information
40	!! between AGCM, OGCM and COUPLER. (OASIS software)
41	!!
42	!! ** Method : 3 types :
43	!! a) Use named pipes(FIFO) to exchange process identifiers
44	!! between the 3 programs
45	!! b) USE a messag passing method with PVM language (CLIM)
46	!! c) USE SVIPC method
47	!!
48	!! ** Input : npiat : agcm process identifier
49	!! npicp : coupler process identifier
50	!! npioc : ogcm process identifier
51	!!
52	!! Reference : see Epicoa 0803 (1992)
53	!!
54	!! History :
55	!! ! 92-09 (L. Terray) Original code
56	!! ! 96-07 (L. Terray) OASIS version 2
57	!! ! 96-11 (E. Guilyardi) run-off + Taux,Tauy x2
58	!! ! 98-04 (M.A Foujols, S. Valcke, M. Imbard) OASIS2.2
59	!! 8.5 ! 02-09 (G. Madec) F90: Free form and module
60	!!----------------------------------------------------------------------
61	!! * Arguments
62	INTEGER, INTENT(in ) :: &
63	kastp, & ! total number of timesteps in oceanic model
64	kexch, & ! frequency of exchange for the fluxes (in time steps)
65	kstep ! timestep value (in seconds)
66
67	!! * Local declarations
68	INTEGER,DIMENSION(3) :: iparal
69	INTEGER :: ifcpl, idt, info, imxtag, istep
70
71	CHARACTER (len=9) :: clpoolnam
72	INTEGER :: ipoolhandle, ipoolsize, index, jf
73	CHARACTER (len=3) :: cljobnam ! experiment name
74	INTEGER :: ierror
75	INTEGER,DIMENSION(4) :: imess, imesso
76	INTEGER :: getpid, mknod ! system functions
77	!!----------------------------------------------------------------------
78
79	IF(lwp) WRITE(numout,*)
80	IF(lwp) WRITE(numout,*) 'cpl_init : initialization in coupled ocean/atmosphere case'
81	IF(lwp) WRITE(numout,*) '~~~~~~~~'
82	IF(lwp) WRITE(numout,*)
83
84	#if defined key_flx_bulk_monthly \|\| defined key_flx_bulk_daily \|\| defined key_flx_forced_daily
85	IF(lwp)WRITE(numout,cform_err)
86	IF(lwp)WRITE(numout,*) ' key_coupled and key_flx_bulk_... are incompatible'
87	nstop = nstop + 1
88	#endif
89
90	IF(lwp)WRITE(numout,*)' coupled simulation'
91	IF(lwp)WRITE(numout,*)' unit ',numlhf,' receive atm fluxes'
92	IF(lwp)WRITE(numout,*)' unit ',numlws,' receive windstress'
93	IF(lwp)WRITE(numout,*)' unit ',numlts,' transfer sst'
94	IF(lwp)WRITE(numout,*)' unit ',numlic,' transfer ice cover'
95
96
97	CALL cpl_read ! read the coupled mode information in namelist
98
99	CALL flush(numout)
100
101	! I- PIPE
102	! --------
103	! W A R N I N G : PIPE technique is temporary diseable (nov. 2000)
104
105	IF( cchan == 'PIPE' ) THEN
106
107	IF(lwp) WRITE(numout,*)
108	IF(lwp) WRITE(numout,*) 'Making pipes for fields to receive from CPL'
109	IF(lwp) WRITE(numout,*)
110	CALL flush(numout)
111	ierror = 0
112
113	! loop to define pipes (CPL=atmos to ocean)
114
115	DO jf = 1, nflxc2o
116	! CALL PIPE_Model_Define(numout,cpl_readflx(jf),jpread,info)
117	IF( info /= 0 ) ierror = ierror + 1
118	END DO
119	DO jf = 1, ntauc2o
120	! CALL PIPE_Model_Define(numout,cpl_readtau(jf),jpread,info)
121	IF( info /= 0 ) ierror = ierror + 1
122	END DO
123
124	IF(lwp) WRITE(numout,*) ' '
125	IF(lwp) WRITE(numout,*) 'Making pipes for fields to send to CPL'
126	IF(lwp) WRITE(numout,*) ' '
127
128	! loop to define pipes (ocean to atmos=CPL)
129
130	DO jf = 1, nfldo2c
131	! CALL PIPE_Model_Define(numout, cpl_writ(jf), jpwrit, info)
132	IF( info /= 0 ) ierror = ierror + 1
133	END DO
134
135	IF( ierror /= 0 ) THEN
136	IF(lwp) WRITE(numout,*) 'Error in pipes definitions'
137	IF(lwp) WRITE(numout,*) 'STOP cpl_init'
138	CALL abort
139	END IF
140
141	IF(lwp) WRITE(numout,*)
142	IF(lwp) WRITE(numout,*) 'All pipes have been made'
143	IF(lwp) WRITE(numout,*)
144
145	IF(lwp) WRITE(numout,*)
146	IF(lwp) WRITE(numout,*) 'Communication test between OCE and CPL'
147	IF(lwp) WRITE(numout,*)
148	CALL flush(numout)
149
150	! CALL PIPE_Model_Stepi(numout, imess, nmodcpl, imesso, ierror)
151
152	IF( ierror /= 0 ) THEN
153	IF(lwp) WRITE(numout,*) 'Error in exchange first informations with Oasis'
154	IF(lwp) WRITE(numout,*) 'STOP cpl_init'
155	CALL abort
156	END IF
157
158	IF(lwp) WRITE(numout,*)
159	IF(lwp) WRITE(numout,*) 'Communication test between OCE and CPL is OK'
160	IF(lwp) WRITE(numout,*) ' total simulation time in oasis = ',imesso(1)
161	IF(lwp) WRITE(numout,*) ' total number of iterations is = ',imesso(2)
162	IF(lwp) WRITE(numout,*) ' value of oasis timestep is = ',imesso(3)
163	IF(lwp) WRITE(numout,*) ' process id for oasis is = ',imesso(4)
164	IF(lwp) WRITE(numout,*)
165	CALL flush(numout)
166
167	! II SVIPC
168	! ---------
169	! W A R N I N G : SVIPC technique is temporary diseable (nov. 2000)
170
171
172	ELSE IF( cchan == 'SIPC' ) THEN
173
174	! debug for more information
175
176	! CALL SVIPC_debug(1)
177
178
179	! 1.1-Define the experiment name :
180
181	cljobnam = 'IPC' ! as $JOBNAM in namcouple
182
183	! 3-Attach to shared memory pool used to exchange initial infos
184
185	info = 0
186	! CALL SIPC_Init_Model (cljobnam, cplmodnam, 1, info)
187	IF( info /= 0 ) THEN
188	IF(lwp) WRITE(numout,*)
189	IF(lwp) WRITE(numout,*)'WARNING: Problem with attachement to',info
190	IF(lwp) WRITE(numout,*)' initial memory pool(s) in ocean'
191	IF(lwp) WRITE(numout,*)
192	CALL abort('STOP in ocean')
193	ENDIF
194
195	! 4-Attach to pools used to exchange fields from ocean to coupler
196
197	DO jf = 1, nfldo2c
198	! Pool name:
199	clpoolnam = 'P'//cpl_writ(jf)
200	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
201	! Resulting pool handle:
202	mpoolwrit(jf) = ipoolhandle
203	END DO
204
205	! 5-Attach to pools used to exchange fields from coupler to ocean
206
207	DO jf = 1, nflxc2o
208	! Pool name:
209	clpoolnam = 'P'//cpl_readflx(jf)
210	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
211	! Resulting pool handle:
212	mpoolread(jf) = ipoolhandle
213	END DO
214
215	DO jf = 1, ntauc2o
216	! Pool name:
217	clpoolnam = 'P'//cpl_readtau(jf)
218	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
219	! Resulting pool handle:
220	mpoolread(jf+nflxc2o) = ipoolhandle
221	END DO
222
223	! 6-Exchange of initial infos
224
225	! Write data array isend to pool READ by Oasis
226
227	info = 0
228	ipoolsize = 4*jpbyteint
229	! CALL SVIPC_write(mpoolinitr, imess, ipoolsize, info)
230
231	! Find error if any
232
233	IF( info < 0 ) THEN
234	IF(lwp) WRITE(numout,*)
235	IF(lwp) WRITE(numout,*) 'Problem in ocean in writing initial'
236	IF(lwp) WRITE(numout,*) 'infos to the shared memory segment(s)'
237	IF(lwp) WRITE(numout,*)
238	ELSE
239	IF(lwp) WRITE(numout,*)
240	IF(lwp) WRITE(numout,*) 'Initial infos written in ocean'
241	IF(lwp) WRITE(numout,*) 'to the shared memory segment(s)'
242	IF(lwp) WRITE(numout,*)
243	ENDIF
244
245	! Read data array irecv from pool written by Oasis
246
247	info = 0
248	ipoolsize = 4 * jpbyteint
249	CALL svipc_read(mpoolinitw, imesso, ipoolsize, info)
250
251	! Find error if any
252
253	IF( info < 0 ) THEN
254	IF(lwp) WRITE(numout,*) ' '
255	IF(lwp) WRITE(numout,*) 'Problem in ocean in reading initial'
256	IF(lwp) WRITE(numout,*) 'infos from the shared memory segment(s)'
257	IF(lwp) WRITE(numout,*) ' '
258	ELSE
259	IF(lwp) WRITE(numout,*) ' '
260	IF(lwp) WRITE(numout,*) 'Initial infos read by ocean'
261	IF(lwp) WRITE(numout,*) 'from the shared memory segment(s)'
262	IF(lwp) WRITE(numout,*) ' '
263	IF(lwp) WRITE(numout,*) ' ntime, niter, nstep, Oasis pid:'
264	IF(lwp) WRITE(numout,*) imesso(1), imesso(2), imesso(3), imesso(4)
265	ENDIF
266
267	! Detach from shared memory segment(s)
268
269	info = 0
270	! CALL SVIPC_close(mpoolinitw, 0, info)
271
272	! Find error if any
273
274	IF( info < 0 ) THEN
275	IF(lwp) WRITE(numout,*) 'Problem in detaching from shared memory segment(s)'
276	IF(lwp) WRITE(numout,*) 'used by ocean to read initial infos'
277	ENDIF
278
279	! III CLIM
280	! --------
281
282	ELSE IF( cchan == 'CLIM' ) THEN
283
284	! Define the number of processors involved in the coupling for
285	! Oasis (=1) and each model (as last two INTEGER on $CHATYPE line
286	! in the namcouple); they will be stored in a COMMON in mpiclim.h
287	! (used for CLIM/MPI2 only)
288	mpi_nproc(0)=1
289	mpi_nproc(1)=1
290	mpi_nproc(2)=1
291
292	! Define the number of processors used by each model as in
293	! $CHATYPE line of namcouple (used for CLIM/MPI2 only)
294	mpi_totproc(1)=1
295	mpi_totproc(2)=1
296
297	! Define names of each model as in $NBMODEL line of namcouple
298	! (used for CLIM/MPI2 only)
299	cmpi_modnam(1)='lmdz.x'
300	cmpi_modnam(2)=cplmodnam
301	!
302	! 1.1-Define the experiment name :
303
304	cljobnam = 'CLI' ! as $JOBNAM in namcouple
305
306	OPEN ( UNIT = 7, FILE = 'trace', STATUS = 'unknown', FORM = 'formatted')
307	CALL clim_init ( cljobnam, cplmodnam, 3, 7, &
308	kastp, kexch, kstep, &
309	5, 3600, 3600, info )
310
311	IF( info /= clim_ok ) THEN
312	IF(lwp) WRITE( numout, *) ' cpl_init : pb init clim '
313	IF(lwp) WRITE( numout, *) ' error code is = ', info
314	CALL abort('STOP in cpl_init')
315	ELSE
316	IF(lwp) WRITE(numout,*) 'cpl_init : init clim ok '
317	ENDIF
318
319	iparal ( clim_strategy ) = clim_serial
320	iparal ( clim_length ) = jpiglo*jpjglo
321	iparal ( clim_offset ) = 0
322
323	! loop to define messages (CPL=atmos to ocean)
324	DO jf = 1, nflxc2o
325	CALL CLIM_Define ( cpl_readflx(jf), clim_in, clim_double, iparal, info )
326	END DO
327	DO jf = 1, ntauc2o
328	CALL CLIM_Define ( cpl_readtau(jf), clim_in, clim_double, iparal, info )
329	END DO
330
331	! loop to define messages (ocean to CPL=atmos)
332	DO jf = 1, nfldo2c
333	CALL CLIM_Define ( cpl_writ(jf), clim_out, clim_double, iparal, info )
334	END DO
335
336	IF(lwp) WRITE(numout,*) 'cpl_init : clim_define ok '
337
338	CALL CLIM_Start ( imxtag, info )
339
340	IF( info /= clim_ok ) THEN
341	IF(lwp) WRITE(numout,*) 'cpl_init : pb start clim '
342	IF(lwp) WRITE(numout,*) ' error code is = ', info
343	CALL abort('stop in cpl_init')
344	ELSE
345	IF(lwp) WRITE(numout,*) 'cpl_init : start clim ok '
346	ENDIF
347
348	CALL CLIM_Stepi ( cploasis, istep, ifcpl, idt, info )
349
350	IF( info /= clim_ok ) THEN
351	IF(lwp) WRITE(numout,*) ' warning : problem in getting step info from oasis '
352	IF(lwp) WRITE(numout,*) ' ======= error code number = ', info
353	ELSE
354	IF(lwp) WRITE(numout,*) ' got step information from oasis '
355	ENDIF
356	IF(lwp) WRITE(numout,*) ' number of tstep in oasis ', istep
357	IF(lwp) WRITE(numout,*) ' exchange frequency in oasis ', ifcpl
358	IF(lwp) WRITE(numout,*) ' length of tstep in oasis ', idt
359	ENDIF
360
361	END SUBROUTINE cpl_init
362
363
364	SUBROUTINE cpl_read
365	!!---------------------------------------------------------------------
366	!! * ROUTINE cpl_read *
367	!!
368	!! ** Purpose :
369	!! Read and print options for the coupled run (namelist)
370	!!
371	!! ** Method : : no
372	!!
373	!! History :
374	!! 8.5 ! 02-12 (G. Madec) F90: Free form and module
375	!!----------------------------------------------------------------------
376	!! * Local declarations
377	INTEGER :: jf
378
379	CHARACTER (len=21) :: clold, clfor, clseq
380	CHARACTER (len=32) :: clname
381
382	NAMELIST/namcpl/ nexco, cchan, nmodcpl, cplmodnam, cploasis &
383	, nfldo2c, nflxc2o, ntauc2o, cpl_f_readflx, cpl_f_readtau &
384	, cpl_f_writ, cpl_readflx, cpl_readtau, cpl_writ
385	!!----------------------------------------------------------------------
386
387	IF(lwp) WRITE(numout,*)
388	IF(lwp) WRITE(numout,*) ' cpl_read : read the coupled parameters in namelist'
389	IF(lwp) WRITE(numout,*) ' ~~~~~~~~'
390	IF(lwp) WRITE(numout,*)
391
392	! Default values
393
394	nexco = 24
395	cchan='PIPE' ! echange TYPE
396	nmodcpl = 2
397	cplmodnam = 'opa.xx' ! model name : as $NBMODEL in namcouple
398	cploasis = 'Oasis' ! coupler name : as in coupler
399
400	! -Define symbolic name for fields exchanged from ocean to coupler,
401	! must be the same as (1) of the field definition in namcouple:
402	nfldo2c=2
403	cpl_writ(1)='SOSSTSST'
404	cpl_writ(2)='SOICECOV'
405
406	! -Define files name for fields exchanged from ocean to coupler,
407	! must be the same as (6) of the field definition in namcouple:
408	nflxc2o=6
409	cpl_readflx(1)='SONSFLDO' ! non solar heat flux (positif vers l'ocean)
410	cpl_readflx(2)='SOSHFLDO' ! solar flux
411	cpl_readflx(3)='SOTOPRSU' ! precip
412	cpl_readflx(4)='SOTFSHSU' ! evaporation
413	cpl_readflx(5)='SORUNCOA' ! coastal run-off
414	cpl_readflx(6)='SORIVFLU' ! river run-off
415	ntauc2o=2
416	cpl_readtau(1)='SOZOTAUX' ! first zonal wind stress
417	cpl_readtau(2)='SOZOTAU2' ! second zonal wind stress
418	cpl_readtau(3)='SOMETAUY' ! first meridien wind stress
419	cpl_readtau(4)='SOMETAU2' ! second meridien wind stress
420
421	! -Define files name for fields exchanged from ocean to coupler,
422	! must be the same as (6) of the field definition in namcouple:
423	cpl_f_writ(1)='ocesst'
424	cpl_f_writ(2)='oceice'
425
426	! -Define files name for fields exchanged from coupler to ocean
427	! must be the same as (7) of the field definition in namcouple:
428	cpl_f_readflx(1)='oceflx'
429	cpl_f_readflx(2)='oceflx'
430	cpl_f_readflx(3)='oceflx'
431	cpl_f_readflx(4)='oceflx'
432	cpl_f_readflx(5)='oceflx'
433	cpl_f_readflx(6)='oceflx'
434	cpl_f_readtau(1)='ocetau'
435	cpl_f_readtau(2)='ocetau'
436	cpl_f_readtau(3)='ocetau'
437	cpl_f_readtau(4)='ocetau'
438
439	! Namelist namcpl : coupling mode and frequency
440	REWIND( numnam )
441	READ ( numnam, namcpl )
442
443	IF(lwp) THEN
444	WRITE(numout,*) 'namcpl'
445	WRITE(numout,*)
446	WRITE(numout,*) ' Coupling exchange frequency nexco = ',nexco
447	WRITE(numout,*) ' Coupling exchange technique cchan = ',cchan
448	WRITE(numout,*) ' Mode Coupling technique nmodcpl = ',nmodcpl
449	WRITE(numout,*) ' Define the model name cplmodnam = ',cplmodnam
450	WRITE(numout,*) ' Define the coupler name cploasis = ',cploasis
451	WRITE(numout,*) ' Fields number ocean to coupler nfldo2c= ',nfldo2c
452	WRITE(numout,*) ' Flux fields coupler to ocean nflxc2o = ',nflxc2o
453	WRITE(numout,*) ' Stress fields coupler to ocean ntauc2o= ',ntauc2o
454	IF ( cchan == 'PIPE' .OR. cchan == 'pipe' ) THEN
455	cchan='PIPE'
456	WRITE(numout,*)'(communication between models made by pipes)'
457	ELSEIF( cchan == 'CLIM' .OR. cchan == 'clim' ) THEN
458	cchan='CLIM'
459	WRITE(numout,*)'(communication between models made by CLIM-PVM)'
460	ELSEIF( cchan == 'SIPC' .OR. cchan == 'sipc' ) THEN
461	cchan='SIPC'
462	WRITE(numout,*)'(communication between models made by the', &
463	'Share Memory Segment and Semaphore)'
464	ELSE
465	WRITE(numout,*) 'technic not yet implemented ',cchan
466	STOP 'in cpl_read'
467	ENDIF
468	DO jf = 1, nflxc2o
469	WRITE(numout,*) 'file to receive field number = ',jf,' ',cpl_f_readflx(jf)
470	END DO
471	DO jf = 1, ntauc2o
472	WRITE(numout,*) 'file to receive field number = ',jf,' ',cpl_f_readtau(jf)
473	END DO
474	DO jf = 1, nfldo2c
475	WRITE(numout,*) 'file to send field number = ',jf,' ',cpl_f_writ(jf)
476	END DO
477	WRITE(numout,*) ' fields received from coupler'
478	DO jf = 1, nflxc2o
479	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_readflx(jf)
480	END DO
481	DO jf = 1, ntauc2o
482	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_readtau(jf)
483	END DO
484	WRITE(numout,*) ' fields send to coupler'
485	DO jf = 1, nfldo2c
486	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_writ(jf)
487	END DO
488	ENDIF
489
490	END SUBROUTINE cpl_read
491
492
493	SUBROUTINE cpl_step( kt )
494	!!---------------------------------------------------------------------
495	!! * ROUTINE cpl_step *
496	!! *****************
497	!! * OASIS routine *
498	!! *****************
499	!! ** Purpose : - At each coupling time-step,this routine sends fields
500	!! like sst or ice cover to the coupler.
501	!! - At each time-step computes time average values
502	!! - Specific treatment for the last time-step
503	!!
504	!! ** Method : 3 types available:
505	!! a) Use named pipes(FIFO) to exchange process identifiers
506	!! between the 3 programs
507	!! b) USE a messag passing method with PVM language (CLIM)
508	!! c) USE SVIPC method
509	!!
510	!! History :
511	!! ! 92-09 (L. Terray) Original code
512	!! ! 96-07 (L. Terray) OASIS version 2
513	!! ! 96-11 (E. Guilyardi) run-off + Taux,Tauy x2
514	!! ! 98-04 (M.A Foujols, S. Valcke, M. Imbard) OASIS2.2
515	!! 8.5 ! 02-06 (G. Madec) F90: Free form and module
516	!!----------------------------------------------------------------------
517	!! * modules used
518	USE ioipsl
519
520	!! * Arguments
521	INTEGER, INTENT( in ) :: kt ! ocean time-step
522
523	!! * Local declarations
524	INTEGER :: ji, jj, jn, jf ! dummy loop indexes
525	INTEGER :: icstep, info, ierror, isize
526	INTEGER :: iflmax, iunmax
527	INTEGER :: ifile(jpmaxfld), ifield(jpmaxfld)
528	CHARACTER (len=8) :: clfile(jpmaxfld)
529	LOGICAL :: llfind
530	REAL(wp), DIMENSION(jpiglo,jpjglo) :: &
531	zstoc, zieoc, zalboc, zticoc
532
533	! netcdf outputs
534
535	CHARACTER (len=80) :: clcplsnam
536	INTEGER, SAVE :: nhoridcs, nidcs, ndexcs(1)
537	LOGICAL, SAVE :: lfirsts = .TRUE.
538	REAL(wp) :: zjulian
539
540	! Additions for SVIPC
541
542	INTEGER :: index
543	INTEGER, DIMENSION(3) :: infos
544	CHARACTER (len=3) :: clmodinf ! Header or not
545	CHARACTER (len=3) :: cljobnam ! experiment name
546	!!----------------------------------------------------------------------
547
548	! coupled mode Ocean/Atmosphere
549
550	! 0. Initialization
551	! -----------------
552
553	isize = jpiglo * jpjglo
554
555	! First time step: ocean sst and ice sea-ice extend set to zero
556	IF( kt == nit000 ) THEN
557	sstoc(:,:) = 0.e0
558	sieoc(:,:) = 0.e0
559	alboc(:,:) = 0.e0
560	ticoc(:,:) = 0.e0
561
562	! initialisation for netcdf outputs
563	!
564	ndexcs(:) = 0
565	clcplsnam = "cpl_oce_sst"
566
567	! Compute julian date from starting date of the run
568	CALL ymds2ju( nyear, nmonth, nday, 0.e0, zjulian )
569	CALL histbeg(clcplsnam, jpiglo, glamt, jpjglo, gphit, &
570	1, jpiglo, 1, jpjglo, 0, &
571	zjulian, rdt, nhoridcs, nidcs)
572	! no vertical axis
573	DO jf = 1, nfldo2c
574	CALL histdef(nidcs, cpl_writ(jf),cpl_writ(jf),"-",jpi, &
575	jpj, nhoridcs, 1, 1, 1, -99, 32, "inst", rdt, rdt)
576	END DO
577	CALL histend(nidcs)
578	ENDIF
579
580	! 1. Cumulated sst and sea-ice extend
581	!------------------------------------
582
583	sstoc(:,:) = sstoc(:,:) + ( 1.0 - freeze(:,:) ) * ( tn(:,:,1) + rt0 )
584	sieoc(:,:) = sieoc(:,:) + freeze(:,:)
585
586	#if defined key_ice_lim
587	alboc(:,:) = alboc(:,:) + freeze(:,:) * alb_ice(:,:)
588	ticoc(:,:) = ticoc(:,:) + freeze(:,:) * tn_ice(:,:)
589	#else
590	alboc(:,:) = alboc(:,:) + freeze(:,:) * 0.8
591	ticoc(:,:) = ticoc(:,:) + freeze(:,:) * ( -10.0 + rt0 )
592	#endif
593
594
595	! 2. Send coupling fields to OASIS
596	!---------------------------------
597
598	IF( MOD(kt,nexco) == 0 ) THEN
599
600	! 2.1 Average : mean coupling fields
601	DO jj = 1, jpjglo
602	DO ji = 1, jpiglo
603	zstoc (ji,jj) = 0.e0
604	zieoc (ji,jj) = 0.e0
605	zalboc(ji,jj) = 0.e0
606	zticoc(ji,jj) = 0.e0
607	END DO
608	END DO
609	DO jj = 1, nlcj
610	DO ji = 1, nlci
611	zstoc (mig(ji),mjg(jj)) = sstoc(ji,jj) / FLOAT( nexco )
612	zieoc (mig(ji),mjg(jj)) = sieoc(ji,jj) / FLOAT( nexco )
613	zalboc(mig(ji),mjg(jj)) = alboc(ji,jj) / FLOAT( nexco )
614	zticoc(mig(ji),mjg(jj)) = ticoc(ji,jj) / FLOAT( nexco )
615	END DO
616	END DO
617	icstep = kt - nit000 + 1
618
619	WRITE(numout,*) ' '
620	WRITE(numout,*) 'STEP: Send fields to CPL with kt= ', kt
621	WRITE(numout,*) ' '
622
623	! outputs
624
625	CALL histwrite( nidcs, cpl_writ(1), kt, zstoc , jpi*jpj, ndexcs )
626	CALL histwrite( nidcs, cpl_writ(2), kt, zieoc , jpi*jpj, ndexcs )
627	CALL histwrite( nidcs, cpl_writ(3), kt, zalboc, jpi*jpj, ndexcs )
628	CALL histwrite( nidcs, cpl_writ(4), kt, zticoc, jpi*jpj, ndexcs )
629	CALL histsync ( nidcs )
630
631	! 2.2 Last time step (clim or pipe) or pipe mode
632	!
633	IF( kt == nitend .OR. cchan == 'PIPE' ) THEN
634
635	! finalize outputs
636
637	CALL histclo(nidcs)
638
639	! WRITE fields for coupler with pipe technique or for last time step
640
641	! initialisation
642
643	iflmax = 1
644	iunmax = 99
645
646	clfile(iflmax) = cpl_f_writ(iflmax) ! keeps first file name
647	ifile(iflmax) = iunmax ! keeps first file unit
648	iunmax = iunmax - 1 ! decrements file unit maximum
649	ifield(1) = ifile(iflmax) ! keeps file unit for field
650
651	! different files names counter
652	DO jf = 2, nfldo2c
653	llfind = .FALSE.
654	DO jn = 1, iflmax
655	IF( .NOT. llfind ) THEN
656	IF( cpl_f_writ(jf) == clfile(jn) ) THEN
657	ifield(jf) = ifile(jn) ! keep file unit for field
658	llfind = .TRUE.
659	ENDIF
660	END IF
661	END DO
662	IF( .NOT. llfind) THEN
663	iflmax = iflmax + 1 ! increment the number of different files
664	clfile(iflmax) = cpl_f_writ(jf) ! keep file name
665	ifile(iflmax) = iunmax ! keep file unit for file
666	ifield(jf) = ifile(iflmax) ! keep file unit for field
667	iunmax = iunmax-1 ! decrement unit maximum number from 99 to 98...
668	ENDIF
669	END DO
670	!
671	DO jn = 1, iflmax
672	OPEN (ifile(jn), FILE=clfile(jn), FORM='UNFORMATTED')
673	END DO
674	!
675	DO jf = 1, nfldo2c
676	IF(jf == 1) CALL locwrite(cpl_writ(jf),zstoc , isize, ifield(jf), ierror, numout)
677	IF(jf == 2) CALL locwrite(cpl_writ(jf),zieoc , isize, ifield(jf), ierror, numout)
678	IF(jf == 3) CALL locwrite(cpl_writ(jf),zalboc, isize, ifield(jf), ierror, numout)
679	IF(jf == 4) CALL locwrite(cpl_writ(jf),zticoc, isize, ifield(jf), ierror, numout)
680	END DO
681
682	! simulate a FLUSH
683
684	DO jn = 1, iflmax
685	CLOSE (ifile(jn))
686	END DO
687
688	! Clim mode
689	IF( cchan == 'CLIM' ) THEN ! inform PVM daemon, I have finished
690	CALL CLIM_Quit (CLIM_ContPvm, info)
691	IF(info /= CLIM_Ok) THEN
692	WRITE (6, *) 'An error occured while leaving CLIM. Error = ',info
693	ENDIF
694	ENDIF
695
696	ENDIF
697
698	! IF last we have finished
699
700	IF (kt == nitend ) RETURN
701
702	! 2.3 normal exchange
703
704	! PIPE mode
705	IF( cchan == 'PIPE' ) THEN
706
707	! Send message to pipes for CPL=atmosphere
708
709	! DO jf = 1, nfldo2c
710	! CALL PIPE_Model_Send(cpl_writ(jf), icstep, numout)
711	! END DO
712
713	! SIPC mode
714	ELSE IF( cchan == 'SIPC' ) THEN
715
716	! Define IF a header must be encapsulated within the field brick :
717	clmodinf = 'NOT' ! as $MODINFO in namcouple
718
719	! IF clmodinf = 'YES', define encapsulated infos to be exchanged
720	! infos(1) = initial date
721	! infos(2) = timestep
722	! infos(3) = actual time
723	!
724	! Writing of output field SST SOSSTSST
725	!
726	! Index of SST in total number of fields jpfldo2a:
727	index = 1
728	!
729	! CALL SIPC_Write_Model(index, isize, clmodinf, cljobnam, infos, zstoc)
730	!
731	! Writing of output field Sea-Ice SOICECOV
732	!
733	! Index of sea-ice in total number of fields jpfldo2a:
734	index = 2
735	!
736	! CALL SIPC_Write_Model(index, isize, clmodinf, cljobnam, infos, zieoc)
737
738	! CLIM mode
739	ELSE IF( cchan == 'CLIM' ) THEN
740
741	DO jn = 1, nfldo2c
742
743	IF (jn == 1) CALL CLIM_Export(cpl_writ(jn), icstep, zstoc , info)
744	IF (jn == 2) CALL CLIM_Export(cpl_writ(jn), icstep, zieoc , info)
745	IF (jn == 3) CALL CLIM_Export(cpl_writ(jn), icstep, zalboc, info)
746	IF (jn == 4) CALL CLIM_Export(cpl_writ(jn), icstep, zticoc, info)
747
748	IF (info /= CLIM_Ok) THEN
749	WRITE (numout,*) 'STEP : Pb giving', cpl_writ(jn), ':', jn
750	WRITE (numout,*) ' at timestep = ', icstep, 'kt = ', kt
751	WRITE (numout,*) 'Clim error code is = ',info
752	WRITE (numout,*) 'STOP in stpcpl '
753	CALL abort(' stpcpl ')
754	ENDIF
755	END DO
756	ENDIF
757
758	! reset cumulative sst and sea-ice extend to zero
759	sstoc(:,:) = 0.0
760	sieoc(:,:) = 0.0
761	alboc(:,:) = 0.0
762	ticoc(:,:) = 0.0
763	ENDIF
764
765	END SUBROUTINE cpl_step
766
767	#else
768	!!----------------------------------------------------------------------
769	!! Default case Dummy module forced Ocean/Atmosphere
770	!!----------------------------------------------------------------------
771	CONTAINS
772	SUBROUTINE cpl_init ! Dummy routine
773	END SUBROUTINE cpl_init
774	SUBROUTINE cpl_step( kt ) ! Dummy routine
775	WRITE(,) kt
776	END SUBROUTINE cpl_step
777	#endif
778
779	!!======================================================================
780	END MODULE cpl

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