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cpl.F90 in trunk/NEMO/OPA_SRC – NEMO

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source: trunk/NEMO/OPA_SRC/cpl.F90 @ 699

Last change on this file since 699 was 699, checked in by smasson, 17 years ago
insert revision Id
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 28.7 KB

Line
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_stp : 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	USE daymod ! calendar
22
23	IMPLICIT NONE
24	PRIVATE
25
26	!! Routine accessibility
27	PUBLIC cpl_init ! routine called in opa module
28	PUBLIC cpl_stp ! routine called in step module
29	!!----------------------------------------------------------------------
30	!! OPA 9.0 , LOCEAN-IPSL (2005)
31	!! $Id$
32	!! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt
33	!!----------------------------------------------------------------------
34
35	CONTAINS
36
37	SUBROUTINE cpl_init( kastp, kexch, kstep )
38	!!---------------------------------------------------------------------
39	!! * ROUTINE cpl_init *
40	!!
41	!! ** Purpose : Initialize coupled mode communication for ocean
42	!! exchange process identifiers and timestep information
43	!! between AGCM, OGCM and COUPLER. (OASIS software)
44	!!
45	!! ** Method : 3 types :
46	!! a) Use named pipes(FIFO) to exchange process identifiers
47	!! between the 3 programs
48	!! b) USE a messag passing method with PVM language (CLIM)
49	!! c) USE SVIPC method
50	!!
51	!! ** Input : npiat : agcm process identifier
52	!! npicp : coupler process identifier
53	!! npioc : ogcm process identifier
54	!!
55	!! Reference : see Epicoa 0803 (1992)
56	!!
57	!! History :
58	!! ! 92-09 (L. Terray) Original code
59	!! ! 96-07 (L. Terray) OASIS version 2
60	!! ! 96-11 (E. Guilyardi) run-off + Taux,Tauy x2
61	!! ! 98-04 (M.A Foujols, S. Valcke, M. Imbard) OASIS2.2
62	!! 8.5 ! 02-09 (G. Madec) F90: Free form and module
63	!!----------------------------------------------------------------------
64	!! * Arguments
65	INTEGER, INTENT(in ) :: &
66	kastp, & ! total number of timesteps in oceanic model
67	kexch, & ! frequency of exchange for the fluxes (in time steps)
68	kstep ! timestep value (in seconds)
69
70	!! * Local declarations
71	INTEGER,DIMENSION(3) :: iparal
72	INTEGER :: ifcpl, idt, info, imxtag, istep
73
74	CHARACTER (len=9) :: clpoolnam
75	INTEGER :: ipoolhandle, ipoolsize, jf
76	CHARACTER (len=3) :: cljobnam ! experiment name
77	INTEGER :: ierror
78	! INTEGER,DIMENSION(4) :: imess
79	INTEGER,DIMENSION(4) :: imesso
80	!!----------------------------------------------------------------------
81
82	IF(lwp) WRITE(numout,*)
83	IF(lwp) WRITE(numout,*) 'cpl_init : initialization in coupled ocean/atmosphere case'
84	IF(lwp) WRITE(numout,*) '~~~~~~~~'
85	IF(lwp) WRITE(numout,*)
86
87	#if defined key_flx_bulk_monthly \|\| defined key_flx_bulk_daily \|\| defined key_flx_forced_daily
88	CALL ctl_stop( 'key_coupled and key_flx_bulk_... are incompatible' )
89	#endif
90
91	CALL cpl_read ! read the coupled mode information in namelist
92
93	CALL flush(numout)
94
95	! I- PIPE
96	! --------
97	! W A R N I N G : PIPE technique is temporary diseable (nov. 2000)
98
99	IF( cchan == 'PIPE' ) THEN
100
101	IF(lwp) WRITE(numout,*)
102	IF(lwp) WRITE(numout,*) 'Making pipes for fields to receive from CPL'
103	IF(lwp) WRITE(numout,*)
104	CALL flush(numout)
105	ierror = 0
106
107	! loop to define pipes (CPL=atmos to ocean)
108
109	DO jf = 1, nflxc2o
110	! CALL PIPE_Model_Define( numout, cpl_readflx(jf), jpread, info )
111	IF( info /= 0 ) ierror = ierror + 1
112	END DO
113	DO jf = 1, ntauc2o
114	! CALL PIPE_Model_Define( numout, cpl_readtau(jf), jpread, info )
115	IF( info /= 0 ) ierror = ierror + 1
116	END DO
117
118	IF(lwp) WRITE(numout,*) ' '
119	IF(lwp) WRITE(numout,*) 'Making pipes for fields to send to CPL'
120	IF(lwp) WRITE(numout,*) ' '
121
122	! loop to define pipes (ocean to atmos=CPL)
123
124	DO jf = 1, nfldo2c
125	! CALL PIPE_Model_Define( numout, cpl_writ(jf), jpwrit, info )
126	IF( info /= 0 ) ierror = ierror + 1
127	END DO
128
129	IF( ierror /= 0 ) THEN
130	IF(lwp) WRITE(numout,*)
131	IF(lwp) WRITE(numout,*) 'cpl_init: end of job due to error in pipes definitions'
132	CALL abort('')
133	END IF
134
135	IF(lwp) WRITE(numout,*)
136	IF(lwp) WRITE(numout,*) 'All pipes have been made'
137
138	IF(lwp) WRITE(numout,*)
139	IF(lwp) WRITE(numout,*) 'Communication test between OCE and CPL'
140	CALL flush(numout)
141
142	! CALL PIPE_Model_Stepi(numout, imess, nmodcpl, imesso, ierror)
143
144	IF( ierror /= 0 ) THEN
145	IF(lwp) WRITE(numout,*)
146	IF(lwp) WRITE(numout,*) 'cpl_init: end of job due to error in exchange first informations with Oasis'
147	CALL abort('')
148	END IF
149
150	IF(lwp) WRITE(numout,*)
151	IF(lwp) WRITE(numout,*) 'Communication test between OCE and CPL is OK'
152	IF(lwp) WRITE(numout,*) ' total simulation time in oasis = ',imesso(1)
153	IF(lwp) WRITE(numout,*) ' total number of iterations is = ',imesso(2)
154	IF(lwp) WRITE(numout,*) ' value of oasis timestep is = ',imesso(3)
155	IF(lwp) WRITE(numout,*) ' process id for oasis is = ',imesso(4)
156	CALL flush(numout)
157
158	! II SVIPC
159	! ---------
160	! W A R N I N G : SVIPC technique is temporary diseable (nov. 2000)
161
162
163	ELSE IF( cchan == 'SIPC' ) THEN
164
165	! debug for more information
166
167	! CALL SVIPC_debug(1)
168
169	! Define the experiment name :
170
171	cljobnam = 'IPC' ! as $JOBNAM in namcouple
172
173	! Attach to shared memory pool used to exchange initial infos
174
175	info = 0
176	! CALL SIPC_Init_Model (cljobnam, cplmodnam, 1, info)
177	IF( info /= 0 ) THEN
178	IF(lwp) WRITE(numout,*)
179	IF(lwp) WRITE(numout,*)'WARNING: Problem with attachement to',info
180	IF(lwp) WRITE(numout,*)' initial memory pool(s) in ocean'
181	IF(lwp) WRITE(numout,*)
182	CALL abort('STOP in ocean')
183	ENDIF
184
185	! Attach to pools used to exchange fields from ocean to coupler
186
187	DO jf = 1, nfldo2c
188	! Pool name:
189	clpoolnam = 'P'//cpl_writ(jf)
190	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
191	! Resulting pool handle:
192	mpoolwrit(jf) = ipoolhandle
193	END DO
194
195	! Attach to pools used to exchange fields from coupler to ocean
196
197	DO jf = 1, nflxc2o
198	! Pool name:
199	clpoolnam = 'P'//cpl_readflx(jf)
200	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
201	! Resulting pool handle:
202	mpoolread(jf) = ipoolhandle
203	END DO
204
205	DO jf = 1, ntauc2o
206	! Pool name:
207	clpoolnam = 'P'//cpl_readtau(jf)
208	! CALL SIPC_Attach(clpoolnam, ipoolhandle)
209	! Resulting pool handle:
210	mpoolread(jf+nflxc2o) = ipoolhandle
211	END DO
212
213	! Exchange of initial infos
214
215	! Write data array isend to pool READ by Oasis
216
217	info = 0
218	ipoolsize = 4*jpbyteint
219	! CALL SVIPC_write(mpoolinitr, imess, ipoolsize, info)
220
221	! Find error if any
222
223	IF( info < 0 ) THEN
224	IF(lwp) WRITE(numout,*)
225	IF(lwp) WRITE(numout,*) 'Problem in ocean in writing initial'
226	IF(lwp) WRITE(numout,*) 'infos to the shared memory segment(s)'
227	IF(lwp) WRITE(numout,*)
228	ELSE
229	IF(lwp) WRITE(numout,*)
230	IF(lwp) WRITE(numout,*) 'Initial infos written in ocean'
231	IF(lwp) WRITE(numout,*) 'to the shared memory segment(s)'
232	IF(lwp) WRITE(numout,*)
233	ENDIF
234
235	! Read data array irecv from pool written by Oasis
236
237	info = 0
238	ipoolsize = 4 * jpbyteint
239	CALL svipc_read(mpoolinitw, imesso, ipoolsize, info)
240
241	! Find error if any
242
243	IF( info < 0 ) THEN
244	IF(lwp) WRITE(numout,*) ' '
245	IF(lwp) WRITE(numout,*) 'Problem in ocean in reading initial'
246	IF(lwp) WRITE(numout,*) 'infos from the shared memory segment(s)'
247	IF(lwp) WRITE(numout,*) ' '
248	ELSE
249	IF(lwp) WRITE(numout,*) ' '
250	IF(lwp) WRITE(numout,*) 'Initial infos read by ocean'
251	IF(lwp) WRITE(numout,*) 'from the shared memory segment(s)'
252	IF(lwp) WRITE(numout,*) ' '
253	IF(lwp) WRITE(numout,*) ' ntime, niter, nstep, Oasis pid:'
254	IF(lwp) WRITE(numout,*) imesso(1), imesso(2), imesso(3), imesso(4)
255	ENDIF
256
257	! Detach from shared memory segment(s)
258
259	info = 0
260	! CALL SVIPC_close(mpoolinitw, 0, info)
261
262	! Find error if any
263
264	IF( info < 0 ) THEN
265	IF(lwp) WRITE(numout,*) 'Problem in detaching from shared memory segment(s)'
266	IF(lwp) WRITE(numout,*) 'used by ocean to read initial infos'
267	ENDIF
268
269	! III CLIM
270	! --------
271
272	ELSE IF( cchan == 'CLIM' ) THEN
273
274	! Define the number of processors involved in the coupling for
275	! Oasis (=1) and each model (as last two INTEGER on $CHATYPE line
276	! in the namcouple); they will be stored in a COMMON in mpiclim.h
277	! (used for CLIM/MPI2 only)
278	mpi_nproc(0)=1
279	mpi_nproc(1)=1
280	mpi_nproc(2)=1
281
282	! Define the number of processors used by each model as in
283	! $CHATYPE line of namcouple (used for CLIM/MPI2 only)
284	mpi_totproc(1)=1
285	mpi_totproc(2)=1
286
287	! Define names of each model as in $NBMODEL line of namcouple
288	! (used for CLIM/MPI2 only)
289	cmpi_modnam(1)='lmdz.x'
290	cmpi_modnam(2)=cplmodnam
291	!
292	! 1.1-Define the experiment name :
293
294	cljobnam = 'CLI' ! as $JOBNAM in namcouple
295
296	OPEN ( UNIT = 7, FILE = 'trace', STATUS = 'unknown', FORM = 'formatted')
297	CALL clim_init ( cljobnam, cplmodnam, 3, 7, &
298	kastp, kexch, kstep, &
299	5, 3600, 3600, info )
300
301	IF( info /= clim_ok ) THEN
302	IF(lwp) WRITE( numout, *) 'cpl_init : pb init clim, error code is = ', info
303	CALL abort( 'STOP in cpl_init' )
304	ELSE
305	IF(lwp) WRITE(numout,*) 'cpl_init : init clim ok '
306	ENDIF
307
308	iparal ( clim_strategy ) = clim_serial
309	iparal ( clim_length ) = jpiglo*jpjglo
310	iparal ( clim_offset ) = 0
311
312	! loop to define messages (CPL=atmos to ocean)
313	DO jf = 1, nflxc2o
314	CALL CLIM_Define ( cpl_readflx(jf), clim_in, clim_double, iparal, info )
315	END DO
316	DO jf = 1, ntauc2o
317	CALL CLIM_Define ( cpl_readtau(jf), clim_in, clim_double, iparal, info )
318	END DO
319
320	! loop to define messages (ocean to CPL=atmos)
321	DO jf = 1, nfldo2c
322	CALL CLIM_Define ( cpl_writ(jf), clim_out, clim_double, iparal, info )
323	END DO
324
325	IF(lwp) WRITE(numout,*) 'cpl_init : clim_define ok '
326
327	CALL CLIM_Start( imxtag, info )
328
329	IF( info /= clim_ok ) THEN
330	IF(lwp) WRITE(numout,*) 'cpl_init : pb start clim, error code is = ', info
331	CALL abort( 'stop in cpl_init' )
332	ELSE
333	IF(lwp) WRITE(numout,*) 'cpl_init : start clim ok '
334	ENDIF
335
336	CALL CLIM_Stepi ( cploasis, istep, ifcpl, idt, info )
337
338	IF( info /= clim_ok ) THEN
339	IF(lwp) WRITE(numout,*) ' warning : problem in getting step info from oasis '
340	IF(lwp) WRITE(numout,*) ' ======= error code number = ', info
341	ELSE
342	IF(lwp) WRITE(numout,*) ' got step information from oasis '
343	ENDIF
344	IF(lwp) WRITE(numout,*) ' number of tstep in oasis ', istep
345	IF(lwp) WRITE(numout,*) ' exchange frequency in oasis ', ifcpl
346	IF(lwp) WRITE(numout,*) ' length of tstep in oasis ', idt
347	ENDIF
348
349	END SUBROUTINE cpl_init
350
351
352	SUBROUTINE cpl_read
353	!!---------------------------------------------------------------------
354	!! * ROUTINE cpl_read *
355	!!
356	!! ** Purpose : Read and print options for the coupled run (namelist)
357	!!
358	!! ** Method : ???
359	!!
360	!! History :
361	!! 8.5 ! 02-12 (G. Madec) F90: Free form and module
362	!!----------------------------------------------------------------------
363	!! * Local declarations
364	INTEGER :: jf
365
366	NAMELIST/namcpl/ nexco, cchan, nmodcpl, cplmodnam, cploasis &
367	, nfldo2c, nflxc2o, ntauc2o, cpl_f_readflx, cpl_f_readtau &
368	, cpl_f_writ, cpl_readflx, cpl_readtau, cpl_writ
369	!!----------------------------------------------------------------------
370
371	IF(lwp) WRITE(numout,*)
372	IF(lwp) WRITE(numout,*) ' cpl_read : read the coupled parameters in namelist'
373	IF(lwp) WRITE(numout,*) ' ~~~~~~~~'
374	IF(lwp) WRITE(numout,*)
375
376	! Default values
377
378	nexco = 24
379	cchan='PIPE' ! echange TYPE
380	nmodcpl = 2
381	cplmodnam = 'opa.xx' ! model name : as $NBMODEL in namcouple
382	cploasis = 'Oasis' ! coupler name : as in coupler
383
384	! -Define symbolic name for fields exchanged from ocean to coupler,
385	! must be the same as (1) of the field definition in namcouple:
386	nfldo2c=2
387	cpl_writ(1)='SOSSTSST'
388	cpl_writ(2)='SOICECOV'
389
390	! -Define files name for fields exchanged from ocean to coupler,
391	! must be the same as (6) of the field definition in namcouple:
392	nflxc2o=6
393	cpl_readflx(1)='SONSFLDO' ! non solar heat flux (positif vers l'ocean)
394	cpl_readflx(2)='SOSHFLDO' ! solar flux
395	cpl_readflx(3)='SOTOPRSU' ! precip
396	cpl_readflx(4)='SOTFSHSU' ! evaporation
397	cpl_readflx(5)='SORUNCOA' ! coastal run-off
398	cpl_readflx(6)='SORIVFLU' ! river run-off
399	ntauc2o=2
400	cpl_readtau(1)='SOZOTAUX' ! first zonal wind stress
401	cpl_readtau(2)='SOZOTAU2' ! second zonal wind stress
402	cpl_readtau(3)='SOMETAUY' ! first meridien wind stress
403	cpl_readtau(4)='SOMETAU2' ! second meridien wind stress
404
405	! -Define files name for fields exchanged from ocean to coupler,
406	! must be the same as (6) of the field definition in namcouple:
407	cpl_f_writ(1)='ocesst'
408	cpl_f_writ(2)='oceice'
409
410	! -Define files name for fields exchanged from coupler to ocean
411	! must be the same as (7) of the field definition in namcouple:
412	cpl_f_readflx(1)='oceflx'
413	cpl_f_readflx(2)='oceflx'
414	cpl_f_readflx(3)='oceflx'
415	cpl_f_readflx(4)='oceflx'
416	cpl_f_readflx(5)='oceflx'
417	cpl_f_readflx(6)='oceflx'
418	cpl_f_readtau(1)='ocetau'
419	cpl_f_readtau(2)='ocetau'
420	cpl_f_readtau(3)='ocetau'
421	cpl_f_readtau(4)='ocetau'
422
423	! Namelist namcpl : coupling mode and frequency
424	REWIND( numnam )
425	READ ( numnam, namcpl )
426
427	IF(lwp) THEN
428	WRITE(numout,*) 'namcpl'
429	WRITE(numout,*)
430	WRITE(numout,*) ' Coupling exchange frequency nexco = ',nexco
431	WRITE(numout,*) ' Coupling exchange technique cchan = ',cchan
432	WRITE(numout,*) ' Mode Coupling technique nmodcpl = ',nmodcpl
433	WRITE(numout,*) ' Define the model name cplmodnam = ',cplmodnam
434	WRITE(numout,*) ' Define the coupler name cploasis = ',cploasis
435	WRITE(numout,*) ' Fields number ocean to coupler nfldo2c= ',nfldo2c
436	WRITE(numout,*) ' Flux fields coupler to ocean nflxc2o = ',nflxc2o
437	WRITE(numout,*) ' Stress fields coupler to ocean ntauc2o= ',ntauc2o
438	IF ( cchan == 'PIPE' .OR. cchan == 'pipe' ) THEN
439	cchan='PIPE'
440	WRITE(numout,*)'(communication between models made by pipes)'
441	ELSEIF( cchan == 'CLIM' .OR. cchan == 'clim' ) THEN
442	cchan='CLIM'
443	WRITE(numout,*)'(communication between models made by CLIM-PVM)'
444	ELSEIF( cchan == 'SIPC' .OR. cchan == 'sipc' ) THEN
445	cchan='SIPC'
446	WRITE(numout,*)'(communication between models made by the', &
447	'Share Memory Segment and Semaphore)'
448	ELSE
449	WRITE(numout,*) 'technic not yet implemented ',cchan
450	STOP 'in cpl_read'
451	ENDIF
452	DO jf = 1, nflxc2o
453	WRITE(numout,*) 'file to receive field number = ',jf,' ',cpl_f_readflx(jf)
454	END DO
455	DO jf = 1, ntauc2o
456	WRITE(numout,*) 'file to receive field number = ',jf,' ',cpl_f_readtau(jf)
457	END DO
458	DO jf = 1, nfldo2c
459	WRITE(numout,*) 'file to send field number = ',jf,' ',cpl_f_writ(jf)
460	END DO
461	WRITE(numout,*) ' fields received from coupler'
462	DO jf = 1, nflxc2o
463	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_readflx(jf)
464	END DO
465	DO jf = 1, ntauc2o
466	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_readtau(jf)
467	END DO
468	WRITE(numout,*) ' fields send to coupler'
469	DO jf = 1, nfldo2c
470	WRITE(numout,*) 'symbolic name for field number = ',jf,' ',cpl_writ(jf)
471	END DO
472	ENDIF
473
474	END SUBROUTINE cpl_read
475
476
477	SUBROUTINE cpl_stp( kt )
478	!!---------------------------------------------------------------------
479	!! * ROUTINE cpl_stp *
480	!! *****************
481	!! * OASIS routine *
482	!! *****************
483	!! ** Purpose : - At each coupling time-step,this routine sends fields
484	!! like sst or ice cover to the coupler.
485	!! - At each time-step computes time average values
486	!! - Specific treatment for the last time-step
487	!!
488	!! ** Method : 3 types available:
489	!! a) Use named pipes(FIFO) to exchange process identifiers
490	!! between the 3 programs
491	!! b) USE a messag passing method with PVM language (CLIM)
492	!! c) USE SVIPC method
493	!!
494	!! History :
495	!! ! 92-09 (L. Terray) Original code
496	!! ! 96-07 (L. Terray) OASIS version 2
497	!! ! 96-11 (E. Guilyardi) run-off + Taux,Tauy x2
498	!! ! 98-04 (M.A Foujols, S. Valcke, M. Imbard) OASIS2.2
499	!! 8.5 ! 02-06 (G. Madec) F90: Free form and module
500	!!----------------------------------------------------------------------
501	!! * modules used
502	USE ioipsl
503	USE phycst ! physical constants
504
505	!! * Arguments
506	INTEGER, INTENT( in ) :: kt ! ocean time-step
507
508	!! * Local declarations
509	INTEGER :: ji, jj, jn, jf ! dummy loop indexes
510	INTEGER :: icstep, info, ierror, isize
511	INTEGER :: iflmax, iunmax
512	INTEGER :: ifile(jpmaxfld), ifield(jpmaxfld)
513	CHARACTER (len=8) :: clfile(jpmaxfld)
514	LOGICAL :: llfind
515	REAL(wp), DIMENSION(jpiglo,jpjglo) :: &
516	zstoc, zieoc, zalboc, zticoc
517
518	! netcdf outputs
519
520	CHARACTER (len=80) :: clcplsnam
521	INTEGER, SAVE :: nhoridcs, nidcs, ndexcs(1)
522	LOGICAL, SAVE :: lfirsts = .TRUE.
523	REAL(wp) :: zjulian
524
525	! Additions for SVIPC
526
527	INTEGER :: index
528	! INTEGER, DIMENSION(3) :: infos
529	CHARACTER (len=3) :: clmodinf ! Header or not
530	! CHARACTER (len=3) :: cljobnam ! experiment name
531	!!----------------------------------------------------------------------
532
533	! coupled mode Ocean/Atmosphere
534
535	! 0. Initialization
536	! -----------------
537
538	isize = jpiglo * jpjglo
539
540	! First time step: ocean sst and ice sea-ice extend set to zero
541	IF( kt == nit000 ) THEN
542	sstoc(:,:) = 0.e0
543	sieoc(:,:) = 0.e0
544	alboc(:,:) = 0.e0
545	ticoc(:,:) = 0.e0
546
547	! initialisation for netcdf outputs
548	!
549	ndexcs(:) = 0
550	clcplsnam = "cpl_oce_sst"
551
552	! Compute julian date from starting date of the run
553	CALL ymds2ju( nyear, nmonth, nday, 0.e0, zjulian )
554	CALL histbeg(clcplsnam, jpiglo, glamt, jpjglo, gphit, &
555	1, jpiglo, 1, jpjglo, 0, &
556	zjulian, rdt, nhoridcs, nidcs, domain_id=nidom)
557	! no vertical axis
558	DO jf = 1, nfldo2c
559	CALL histdef(nidcs, cpl_writ(jf),cpl_writ(jf),"-",jpi, &
560	jpj, nhoridcs, 1, 1, 1, -99, 32, "inst", rdt, rdt)
561	END DO
562	CALL histend(nidcs)
563	ENDIF
564
565	! 1. Cumulated sst and sea-ice extend
566	!------------------------------------
567
568	sstoc(:,:) = sstoc(:,:) + ( 1.0 - freeze(:,:) ) * ( tn(:,:,1) + rt0 )
569	sieoc(:,:) = sieoc(:,:) + freeze(:,:)
570
571	#if defined key_ice_lim
572	alboc(:,:) = alboc(:,:) + freeze(:,:) * alb_ice(:,:)
573	ticoc(:,:) = ticoc(:,:) + freeze(:,:) * tn_ice(:,:)
574	#else
575	alboc(:,:) = alboc(:,:) + freeze(:,:) * 0.8
576	ticoc(:,:) = ticoc(:,:) + freeze(:,:) * ( -10.e0 + rt0 )
577	#endif
578
579
580	! 2. Send coupling fields to OASIS
581	!---------------------------------
582
583	IF( MOD( kt, nexco ) == 0 ) THEN
584
585	! 2.1 Average : mean coupling fields
586	zstoc (:,:) = 0.e0
587	zieoc (:,:) = 0.e0
588	zalboc(:,:) = 0.e0
589	zticoc(:,:) = 0.e0
590	DO jj = 1, nlcj
591	DO ji = 1, nlci
592	zstoc (mig(ji),mjg(jj)) = sstoc(ji,jj) / FLOAT( nexco )
593	zieoc (mig(ji),mjg(jj)) = sieoc(ji,jj) / FLOAT( nexco )
594	zalboc(mig(ji),mjg(jj)) = alboc(ji,jj) / FLOAT( nexco )
595	zticoc(mig(ji),mjg(jj)) = ticoc(ji,jj) / FLOAT( nexco )
596	END DO
597	END DO
598	icstep = kt - nit000 + 1
599
600	WRITE(numout,*)
601	WRITE(numout,*) 'STEP: Send fields to CPL with kt= ', kt
602	WRITE(numout,*)
603
604	! outputs
605
606	CALL histwrite( nidcs, cpl_writ(1), kt, zstoc , jpi*jpj, ndexcs )
607	CALL histwrite( nidcs, cpl_writ(2), kt, zieoc , jpi*jpj, ndexcs )
608	CALL histwrite( nidcs, cpl_writ(3), kt, zalboc, jpi*jpj, ndexcs )
609	CALL histwrite( nidcs, cpl_writ(4), kt, zticoc, jpi*jpj, ndexcs )
610	CALL histsync ( nidcs )
611
612	! 2.2 Last time step (clim or pipe) or pipe mode
613	!
614	IF( kt == nitend .OR. cchan == 'PIPE' ) THEN
615
616	! finalize outputs
617
618	CALL histclo( nidcs )
619
620	! WRITE fields for coupler with pipe technique or for last time step
621
622	! initialisation
623
624	iflmax = 1
625	iunmax = 99
626
627	clfile(iflmax) = cpl_f_writ(iflmax) ! keeps first file name
628	ifile(iflmax) = iunmax ! keeps first file unit
629	iunmax = iunmax - 1 ! decrements file unit maximum
630	ifield(1) = ifile(iflmax) ! keeps file unit for field
631
632	! different files names counter
633	DO jf = 2, nfldo2c
634	llfind = .FALSE.
635	DO jn = 1, iflmax
636	IF( .NOT. llfind ) THEN
637	IF( cpl_f_writ(jf) == clfile(jn) ) THEN
638	ifield(jf) = ifile(jn) ! keep file unit for field
639	llfind = .TRUE.
640	ENDIF
641	END IF
642	END DO
643	IF( .NOT. llfind) THEN
644	iflmax = iflmax + 1 ! increment the number of different files
645	clfile(iflmax) = cpl_f_writ(jf) ! keep file name
646	ifile (iflmax) = iunmax ! keep file unit for file
647	ifield(jf) = ifile(iflmax) ! keep file unit for field
648	iunmax = iunmax-1 ! decrement unit maximum number from 99 to 98...
649	ENDIF
650	END DO
651	!
652	DO jn = 1, iflmax
653	OPEN (ifile(jn), FILE=clfile(jn), FORM='UNFORMATTED')
654	END DO
655	!
656	DO jf = 1, nfldo2c
657	IF( jf == 1 ) CALL locwrite(cpl_writ(jf),zstoc , isize, ifield(jf), ierror, numout)
658	IF( jf == 2 ) CALL locwrite(cpl_writ(jf),zieoc , isize, ifield(jf), ierror, numout)
659	IF( jf == 3 ) CALL locwrite(cpl_writ(jf),zalboc, isize, ifield(jf), ierror, numout)
660	IF( jf == 4 ) CALL locwrite(cpl_writ(jf),zticoc, isize, ifield(jf), ierror, numout)
661	END DO
662
663	! simulate a FLUSH
664
665	DO jn = 1, iflmax
666	CLOSE( ifile(jn) )
667	END DO
668
669	! Clim mode
670	IF( cchan == 'CLIM' ) THEN ! inform PVM daemon, I have finished
671	CALL CLIM_Quit( CLIM_ContPvm, info )
672	IF( info /= CLIM_Ok ) THEN
673	WRITE (6, *) 'An error occured while leaving CLIM. Error = ',info
674	ENDIF
675	ENDIF
676
677	ENDIF
678
679	! IF last we have finished if not pass info to the atmosphere
680
681	IF ( kt /= nitend ) THEN
682
683	! 2.3 normal exchange
684
685	! PIPE mode
686	IF( cchan == 'PIPE' ) THEN
687
688	! Send message to pipes for CPL=atmosphere
689
690	! DO jf = 1, nfldo2c
691	! CALL PIPE_Model_Send(cpl_writ(jf), icstep, numout)
692	! END DO
693
694	! SIPC mode
695	ELSE IF( cchan == 'SIPC' ) THEN
696
697	! Define IF a header must be encapsulated within the field brick :
698	clmodinf = 'NOT' ! as $MODINFO in namcouple
699
700	! IF clmodinf = 'YES', define encapsulated infos to be exchanged
701	! infos(1) = initial date
702	! infos(2) = timestep
703	! infos(3) = actual time
704	!
705	! Writing of output field SST SOSSTSST
706	!
707	! Index of SST in total number of fields jpfldo2a:
708	index = 1
709	!
710	! CALL SIPC_Write_Model(index, isize, clmodinf, cljobnam, infos, zstoc)
711	!
712	! Writing of output field Sea-Ice SOICECOV
713	!
714	! Index of sea-ice in total number of fields jpfldo2a:
715	index = 2
716	!
717	! CALL SIPC_Write_Model(index, isize, clmodinf, cljobnam, infos, zieoc)
718
719	! CLIM mode
720	ELSE IF( cchan == 'CLIM' ) THEN
721
722	DO jn = 1, nfldo2c
723
724	IF (jn == 1) CALL CLIM_Export(cpl_writ(jn), icstep, zstoc , info)
725	IF (jn == 2) CALL CLIM_Export(cpl_writ(jn), icstep, zieoc , info)
726	IF (jn == 3) CALL CLIM_Export(cpl_writ(jn), icstep, zalboc, info)
727	IF (jn == 4) CALL CLIM_Export(cpl_writ(jn), icstep, zticoc, info)
728
729	IF (info /= CLIM_Ok) THEN
730	WRITE (numout,*) 'STEP : Pb giving', cpl_writ(jn), ':', jn
731	WRITE (numout,*) ' at timestep = ', icstep, 'kt = ', kt
732	WRITE (numout,*) 'Clim error code is = ',info
733	WRITE (numout,*) 'STOP in stpcpl '
734	CALL abort(' stpcpl ')
735	ENDIF
736	END DO
737	ENDIF
738
739	! reset cumulative sst and sea-ice extend to zero
740	sstoc(:,:) = 0.e0
741	sieoc(:,:) = 0.e0
742	alboc(:,:) = 0.e0
743	ticoc(:,:) = 0.e0
744	ENDIF
745	ENDIF
746
747	END SUBROUTINE cpl_stp
748
749	#else
750	!!----------------------------------------------------------------------
751	!! Default case Dummy module forced Ocean/Atmosphere
752	!!----------------------------------------------------------------------
753	CONTAINS
754	SUBROUTINE cpl_init ! Dummy routine
755	WRITE(,) 'cpl_init: You should have not see this print! error?'
756	END SUBROUTINE cpl_init
757	SUBROUTINE cpl_stp( kt ) ! Dummy routine
758	WRITE(,) 'cpl_stp: You should have not see this print! error?', kt
759	END SUBROUTINE cpl_stp
760	#endif
761
762	!!======================================================================
763	END MODULE cpl

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